all: Rework page store, add a dynacache, improve partial rebuilds, and some general spring cleaning

There are some breaking changes in this commit, see #11455.

Closes #11455
Closes #11549

This fixes a set of bugs (see issue list) and it is also paying some technical debt accumulated over the years. We now build with Staticcheck enabled in the CI build.

The performance should be about the same as before for regular sized Hugo sites, but it should perform and scale much better to larger data sets, as objects that uses lots of memory (e.g. rendered Markdown, big JSON files read into maps with transform.Unmarshal etc.) will now get automatically garbage collected if needed. Performance on partial rebuilds when running the server in fast render mode should be the same, but the change detection should be much more accurate.

A list of the notable new features:

* A new dependency tracker that covers (almost) all of Hugo's API and is used to do fine grained partial rebuilds when running the server.
* A new and simpler tree document store which allows fast lookups and prefix-walking in all dimensions (e.g. language) concurrently.
* You can now configure an upper memory limit allowing for much larger data sets and/or running on lower specced PCs.
We have lifted the "no resources in sub folders" restriction for branch bundles (e.g. sections).
Memory Limit
* Hugos will, by default, set aside a quarter of the total system memory, but you can set this via the OS environment variable HUGO_MEMORYLIMIT (in gigabytes). This is backed by a partitioned LRU cache used throughout Hugo. A cache that gets dynamically resized in low memory situations, allowing Go's Garbage Collector to free the memory.

New Dependency Tracker: Hugo has had a rule based coarse grained approach to server rebuilds that has worked mostly pretty well, but there have been some surprises (e.g. stale content). This is now revamped with a new dependency tracker that can quickly calculate the delta given a changed resource (e.g. a content file, template, JS file etc.). This handles transitive relations, e.g. $page -> js.Build -> JS import, or $page1.Content -> render hook -> site.GetPage -> $page2.Title, or $page1.Content -> shortcode -> partial -> site.RegularPages -> $page2.Content -> shortcode ..., and should also handle changes to aggregated values (e.g. site.Lastmod) effectively.

This covers all of Hugo's API with 2 known exceptions (a list that may not be fully exhaustive):

Changes to files loaded with template func os.ReadFile may not be handled correctly. We recommend loading resources with resources.Get
Changes to Hugo objects (e.g. Page) passed in the template context to lang.Translate may not be detected correctly. We recommend having simple i18n templates without too much data context passed in other than simple types such as strings and numbers.
Note that the cachebuster configuration (when A changes then rebuild B) works well with the above, but we recommend that you revise that configuration, as it in most situations should not be needed. One example where it is still needed is with TailwindCSS and using changes to hugo_stats.json to trigger new CSS rebuilds.

Document Store: Previously, a little simplified, we split the document store (where we store pages and resources) in a tree per language. This worked pretty well, but the structure made some operations harder than they needed to be. We have now restructured it into one Radix tree for all languages. Internally the language is considered to be a dimension of that tree, and the tree can be viewed in all dimensions concurrently. This makes some operations re. language simpler (e.g. finding translations is just a slice range), but the idea is that it should also be relatively inexpensive to add more dimensions if needed (e.g. role).

Fixes #10169
Fixes #10364
Fixes #10482
Fixes #10630
Fixes #10656
Fixes #10694
Fixes #10918
Fixes #11262
Fixes #11439
Fixes #11453
Fixes #11457
Fixes #11466
Fixes #11540
Fixes #11551
Fixes #11556
Fixes #11654
Fixes #11661
Fixes #11663
Fixes #11664
Fixes #11669
Fixes #11671
Fixes #11807
Fixes #11808
Fixes #11809
Fixes #11815
Fixes #11840
Fixes #11853
Fixes #11860
Fixes #11883
Fixes #11904
Fixes #7388
Fixes #7425
Fixes #7436
Fixes #7544
Fixes #7882
Fixes #7960
Fixes #8255
Fixes #8307
Fixes #8863
Fixes #8927
Fixes #9192
Fixes #9324

.github/workflows/test.yml

@@ -87,6 +87,12 @@ jobs:
         curl -LJO "https://github.com/sass/dart-sass/releases/download/${env:SASS_VERSION}/dart-sass-${env:SASS_VERSION}-windows-x64.zip";
         Expand-Archive -Path "dart-sass-${env:SASS_VERSION}-windows-x64.zip" -DestinationPath .;
         echo  "$env:GITHUB_WORKSPACE/dart-sass/" | Out-File -FilePath $Env:GITHUB_PATH -Encoding utf-8 -Append
+    - if: matrix.os == 'ubuntu-latest'
+      name: Install staticcheck
+      run: go install honnef.co/go/tools/cmd/staticcheck@latest
+    - if: matrix.os == 'ubuntu-latest'
+      name: Run staticcheck
+      run: staticcheck ./...
     - if: matrix.os != 'windows-latest'
       name: Check
       run: |

cache/dynacache/dynacache.go

@@ -0,0 +1,550 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package dynacache
+
+import (
+	"context"
+	"fmt"
+	"math"
+	"path"
+	"regexp"
+	"runtime"
+	"sync"
+	"time"
+
+	"github.com/bep/lazycache"
+	"github.com/bep/logg"
+	"github.com/gohugoio/hugo/common/herrors"
+	"github.com/gohugoio/hugo/common/loggers"
+	"github.com/gohugoio/hugo/common/paths"
+	"github.com/gohugoio/hugo/common/rungroup"
+	"github.com/gohugoio/hugo/config"
+	"github.com/gohugoio/hugo/helpers"
+	"github.com/gohugoio/hugo/identity"
+	"github.com/gohugoio/hugo/resources/resource"
+)
+
+const minMaxSize = 10
+
+// New creates a new cache.
+func New(opts Options) *Cache {
+	if opts.CheckInterval == 0 {
+		opts.CheckInterval = time.Second * 2
+	}
+
+	if opts.MaxSize == 0 {
+		opts.MaxSize = 100000
+	}
+	if opts.Log == nil {
+		panic("nil Log")
+	}
+
+	if opts.MinMaxSize == 0 {
+		opts.MinMaxSize = 30
+	}
+
+	stats := &stats{
+		opts:             opts,
+		adjustmentFactor: 1.0,
+		currentMaxSize:   opts.MaxSize,
+		availableMemory:  config.GetMemoryLimit(),
+	}
+
+	infol := opts.Log.InfoCommand("dynacache")
+
+	c := &Cache{
+		partitions: make(map[string]PartitionManager),
+		opts:       opts,
+		stats:      stats,
+		infol:      infol,
+	}
+
+	c.stop = c.start()
+
+	return c
+}
+
+// Options for the cache.
+type Options struct {
+	Log           loggers.Logger
+	CheckInterval time.Duration
+	MaxSize       int
+	MinMaxSize    int
+	Running       bool
+}
+
+// Options for a partition.
+type OptionsPartition struct {
+	// When to clear the this partition.
+	ClearWhen ClearWhen
+
+	// Weight is a number between 1 and 100 that indicates how, in general, how big this partition may get.
+	Weight int
+}
+
+func (o OptionsPartition) WeightFraction() float64 {
+	return float64(o.Weight) / 100
+}
+
+func (o OptionsPartition) CalculateMaxSize(maxSizePerPartition int) int {
+	return int(math.Floor(float64(maxSizePerPartition) * o.WeightFraction()))
+}
+
+// A dynamic partitioned cache.
+type Cache struct {
+	mu sync.RWMutex
+
+	partitions map[string]PartitionManager
+	opts       Options
+	infol      logg.LevelLogger
+
+	stats    *stats
+	stopOnce sync.Once
+	stop     func()
+}
+
+// ClearMatching clears all partition for which the predicate returns true.
+func (c *Cache) ClearMatching(predicate func(k, v any) bool) {
+	g := rungroup.Run[PartitionManager](context.Background(), rungroup.Config[PartitionManager]{
+		NumWorkers: len(c.partitions),
+		Handle: func(ctx context.Context, partition PartitionManager) error {
+			partition.clearMatching(predicate)
+			return nil
+		},
+	})
+
+	for _, p := range c.partitions {
+		g.Enqueue(p)
+	}
+
+	g.Wait()
+}
+
+// ClearOnRebuild prepares the cache for a new rebuild taking the given changeset into account.
+func (c *Cache) ClearOnRebuild(changeset ...identity.Identity) {
+	g := rungroup.Run[PartitionManager](context.Background(), rungroup.Config[PartitionManager]{
+		NumWorkers: len(c.partitions),
+		Handle: func(ctx context.Context, partition PartitionManager) error {
+			partition.clearOnRebuild(changeset...)
+			return nil
+		},
+	})
+
+	for _, p := range c.partitions {
+		g.Enqueue(p)
+	}
+
+	g.Wait()
+
+	// Clear any entries marked as stale above.
+	g = rungroup.Run[PartitionManager](context.Background(), rungroup.Config[PartitionManager]{
+		NumWorkers: len(c.partitions),
+		Handle: func(ctx context.Context, partition PartitionManager) error {
+			partition.clearStale()
+			return nil
+		},
+	})
+
+	for _, p := range c.partitions {
+		g.Enqueue(p)
+	}
+
+	g.Wait()
+}
+
+type keysProvider interface {
+	Keys() []string
+}
+
+// Keys returns a list of keys in all partitions.
+func (c *Cache) Keys(predicate func(s string) bool) []string {
+	if predicate == nil {
+		predicate = func(s string) bool { return true }
+	}
+	var keys []string
+	for pn, g := range c.partitions {
+		pkeys := g.(keysProvider).Keys()
+		for _, k := range pkeys {
+			p := path.Join(pn, k)
+			if predicate(p) {
+				keys = append(keys, p)
+			}
+		}
+
+	}
+	return keys
+}
+
+func calculateMaxSizePerPartition(maxItemsTotal, totalWeightQuantity, numPartitions int) int {
+	if numPartitions == 0 {
+		panic("numPartitions must be > 0")
+	}
+	if totalWeightQuantity == 0 {
+		panic("totalWeightQuantity must be > 0")
+	}
+
+	avgWeight := float64(totalWeightQuantity) / float64(numPartitions)
+	return int(math.Floor(float64(maxItemsTotal) / float64(numPartitions) * (100.0 / avgWeight)))
+}
+
+// Stop stops the cache.
+func (c *Cache) Stop() {
+	c.stopOnce.Do(func() {
+		c.stop()
+	})
+}
+
+func (c *Cache) adjustCurrentMaxSize() {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+
+	if len(c.partitions) == 0 {
+		return
+	}
+	var m runtime.MemStats
+	runtime.ReadMemStats(&m)
+	s := c.stats
+	s.memstatsCurrent = m
+	// fmt.Printf("\n\nAvailable = %v\nAlloc = %v\nTotalAlloc = %v\nSys = %v\nNumGC = %v\nMaxSize = %d\nAdjustmentFactor=%f\n\n", helpers.FormatByteCount(s.availableMemory), helpers.FormatByteCount(m.Alloc), helpers.FormatByteCount(m.TotalAlloc), helpers.FormatByteCount(m.Sys), m.NumGC, c.stats.currentMaxSize, s.adjustmentFactor)
+
+	if s.availableMemory >= s.memstatsCurrent.Alloc {
+		if s.adjustmentFactor <= 1.0 {
+			s.adjustmentFactor += 0.2
+		}
+	} else {
+		// We're low on memory.
+		s.adjustmentFactor -= 0.4
+	}
+
+	if s.adjustmentFactor <= 0 {
+		s.adjustmentFactor = 0.05
+	}
+
+	if !s.adjustCurrentMaxSize() {
+		return
+	}
+
+	totalWeight := 0
+	for _, pm := range c.partitions {
+		totalWeight += pm.getOptions().Weight
+	}
+
+	maxSizePerPartition := calculateMaxSizePerPartition(c.stats.currentMaxSize, totalWeight, len(c.partitions))
+
+	evicted := 0
+	for _, p := range c.partitions {
+		evicted += p.adjustMaxSize(p.getOptions().CalculateMaxSize(maxSizePerPartition))
+	}
+
+	if evicted > 0 {
+		c.infol.
+			WithFields(
+				logg.Fields{
+					{Name: "evicted", Value: evicted},
+					{Name: "numGC", Value: m.NumGC},
+					{Name: "limit", Value: helpers.FormatByteCount(c.stats.availableMemory)},
+					{Name: "alloc", Value: helpers.FormatByteCount(m.Alloc)},
+					{Name: "totalAlloc", Value: helpers.FormatByteCount(m.TotalAlloc)},
+				},
+			).Logf("adjusted partitions' max size")
+	}
+}
+
+func (c *Cache) start() func() {
+	ticker := time.NewTicker(c.opts.CheckInterval)
+	quit := make(chan struct{})
+
+	go func() {
+		for {
+			select {
+			case <-ticker.C:
+				c.adjustCurrentMaxSize()
+			case <-quit:
+				ticker.Stop()
+				return
+			}
+		}
+	}()
+
+	return func() {
+		close(quit)
+	}
+}
+
+var partitionNameRe = regexp.MustCompile(`^\/[a-zA-Z0-9]{4}(\/[a-zA-Z0-9]+)?(\/[a-zA-Z0-9]+)?`)
+
+// GetOrCreatePartition gets or creates a partition with the given name.
+func GetOrCreatePartition[K comparable, V any](c *Cache, name string, opts OptionsPartition) *Partition[K, V] {
+	if c == nil {
+		panic("nil Cache")
+	}
+	if opts.Weight < 1 || opts.Weight > 100 {
+		panic("invalid Weight, must be between 1 and 100")
+	}
+
+	if partitionNameRe.FindString(name) != name {
+		panic(fmt.Sprintf("invalid partition name %q", name))
+	}
+
+	c.mu.RLock()
+	p, found := c.partitions[name]
+	c.mu.RUnlock()
+	if found {
+		return p.(*Partition[K, V])
+	}
+
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	// Double check.
+	p, found = c.partitions[name]
+	if found {
+		return p.(*Partition[K, V])
+	}
+
+	// At this point, we don't know the the number of partitions or their configuration, but
+	// this will be re-adjusted later.
+	const numberOfPartitionsEstimate = 10
+	maxSize := opts.CalculateMaxSize(c.opts.MaxSize / numberOfPartitionsEstimate)
+
+	// Create a new partition and cache it.
+	partition := &Partition[K, V]{
+		c:       lazycache.New(lazycache.Options[K, V]{MaxEntries: maxSize}),
+		maxSize: maxSize,
+		trace:   c.opts.Log.Logger().WithLevel(logg.LevelTrace).WithField("partition", name),
+		opts:    opts,
+	}
+	c.partitions[name] = partition
+
+	return partition
+}
+
+// Partition is a partition in the cache.
+type Partition[K comparable, V any] struct {
+	c *lazycache.Cache[K, V]
+
+	zero V
+
+	trace logg.LevelLogger
+	opts  OptionsPartition
+
+	maxSize int
+}
+
+// GetOrCreate gets or creates a value for the given key.
+func (p *Partition[K, V]) GetOrCreate(key K, create func(key K) (V, error)) (V, error) {
+	v, _, err := p.c.GetOrCreate(key, create)
+	return v, err
+}
+
+// GetOrCreateWitTimeout gets or creates a value for the given key and times out if the create function
+// takes too long.
+func (p *Partition[K, V]) GetOrCreateWitTimeout(key K, duration time.Duration, create func(key K) (V, error)) (V, error) {
+	resultch := make(chan V, 1)
+	errch := make(chan error, 1)
+
+	go func() {
+		v, _, err := p.c.GetOrCreate(key, create)
+		if err != nil {
+			errch <- err
+			return
+		}
+		resultch <- v
+	}()
+
+	select {
+	case v := <-resultch:
+		return v, nil
+	case err := <-errch:
+		return p.zero, err
+	case <-time.After(duration):
+		return p.zero, &herrors.TimeoutError{
+			Duration: duration,
+		}
+	}
+}
+
+func (p *Partition[K, V]) clearMatching(predicate func(k, v any) bool) {
+	p.c.DeleteFunc(func(key K, v V) bool {
+		if predicate(key, v) {
+			p.trace.Log(
+				logg.StringFunc(
+					func() string {
+						return fmt.Sprintf("clearing cache key %v", key)
+					},
+				),
+			)
+			return true
+		}
+		return false
+	})
+}
+
+func (p *Partition[K, V]) clearOnRebuild(changeset ...identity.Identity) {
+	opts := p.getOptions()
+	if opts.ClearWhen == ClearNever {
+		return
+	}
+
+	if opts.ClearWhen == ClearOnRebuild {
+		// Clear all.
+		p.Clear()
+		return
+	}
+
+	depsFinder := identity.NewFinder(identity.FinderConfig{})
+
+	shouldDelete := func(key K, v V) bool {
+		// We always clear elements marked as stale.
+		if resource.IsStaleAny(v) {
+			return true
+		}
+
+		// Now check if this entry has changed based on the changeset
+		// based on filesystem events.
+		if len(changeset) == 0 {
+			// Nothing changed.
+			return false
+		}
+
+		var probablyDependent bool
+		identity.WalkIdentitiesShallow(v, func(level int, id2 identity.Identity) bool {
+			for _, id := range changeset {
+				if r := depsFinder.Contains(id, id2, -1); r > 0 {
+					// It's probably dependent, evict from cache.
+					probablyDependent = true
+					return true
+				}
+			}
+			return false
+		})
+
+		return probablyDependent
+	}
+
+	// First pass.
+	// Second pass needs to be done in a separate loop to catch any
+	// elements marked as stale in the other partitions.
+	p.c.DeleteFunc(func(key K, v V) bool {
+		if shouldDelete(key, v) {
+			p.trace.Log(
+				logg.StringFunc(
+					func() string {
+						return fmt.Sprintf("first pass: clearing cache key %v", key)
+					},
+				),
+			)
+			resource.MarkStale(v)
+			return true
+		}
+		return false
+	})
+}
+
+func (p *Partition[K, V]) Keys() []K {
+	var keys []K
+	p.c.DeleteFunc(func(key K, v V) bool {
+		keys = append(keys, key)
+		return false
+	})
+	return keys
+}
+
+func (p *Partition[K, V]) clearStale() {
+	p.c.DeleteFunc(func(key K, v V) bool {
+		isStale := resource.IsStaleAny(v)
+		if isStale {
+			p.trace.Log(
+				logg.StringFunc(
+					func() string {
+						return fmt.Sprintf("second pass: clearing cache key %v", key)
+					},
+				),
+			)
+		}
+
+		return isStale
+	})
+}
+
+// adjustMaxSize adjusts the max size of the and returns the number of items evicted.
+func (p *Partition[K, V]) adjustMaxSize(newMaxSize int) int {
+	if newMaxSize < minMaxSize {
+		newMaxSize = minMaxSize
+	}
+	p.maxSize = newMaxSize
+	// fmt.Println("Adjusting max size of partition from", oldMaxSize, "to", newMaxSize)
+	return p.c.Resize(newMaxSize)
+}
+
+func (p *Partition[K, V]) getMaxSize() int {
+	return p.maxSize
+}
+
+func (p *Partition[K, V]) getOptions() OptionsPartition {
+	return p.opts
+}
+
+func (p *Partition[K, V]) Clear() {
+	p.c.DeleteFunc(func(key K, v V) bool {
+		return true
+	})
+}
+
+func (p *Partition[K, V]) Get(ctx context.Context, key K) (V, bool) {
+	return p.c.Get(key)
+}
+
+type PartitionManager interface {
+	adjustMaxSize(addend int) int
+	getMaxSize() int
+	getOptions() OptionsPartition
+	clearOnRebuild(changeset ...identity.Identity)
+	clearMatching(predicate func(k, v any) bool)
+	clearStale()
+}
+
+const (
+	ClearOnRebuild ClearWhen = iota + 1
+	ClearOnChange
+	ClearNever
+)
+
+type ClearWhen int
+
+type stats struct {
+	opts            Options
+	memstatsCurrent runtime.MemStats
+	currentMaxSize  int
+	availableMemory uint64
+
+	adjustmentFactor float64
+}
+
+func (s *stats) adjustCurrentMaxSize() bool {
+	newCurrentMaxSize := int(math.Floor(float64(s.opts.MaxSize) * s.adjustmentFactor))
+
+	if newCurrentMaxSize < s.opts.MaxSize {
+		newCurrentMaxSize = int(s.opts.MinMaxSize)
+	}
+	changed := newCurrentMaxSize != s.currentMaxSize
+	s.currentMaxSize = newCurrentMaxSize
+	return changed
+}
+
+// CleanKey turns s into a format suitable for a cache key for this package.
+// The key will be a Unix-styled path with a leading slash but no trailing slash.
+func CleanKey(s string) string {
+	return path.Clean(paths.ToSlashPreserveLeading(s))
+}

cache/dynacache/dynacache_test.go

@@ -0,0 +1,175 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package dynacache
+
+import (
+	"path/filepath"
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/common/loggers"
+	"github.com/gohugoio/hugo/identity"
+	"github.com/gohugoio/hugo/resources/resource"
+)
+
+var (
+	_ resource.StaleInfo = (*testItem)(nil)
+	_ identity.Identity  = (*testItem)(nil)
+)
+
+type testItem struct {
+	name    string
+	isStale bool
+}
+
+func (t testItem) IsStale() bool {
+	return t.isStale
+}
+
+func (t testItem) IdentifierBase() string {
+	return t.name
+}
+
+func TestCache(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+
+	cache := New(Options{
+		Log: loggers.NewDefault(),
+	})
+
+	c.Cleanup(func() {
+		cache.Stop()
+	})
+
+	opts := OptionsPartition{Weight: 30}
+
+	c.Assert(cache, qt.Not(qt.IsNil))
+
+	p1 := GetOrCreatePartition[string, testItem](cache, "/aaaa/bbbb", opts)
+	c.Assert(p1, qt.Not(qt.IsNil))
+
+	p2 := GetOrCreatePartition[string, testItem](cache, "/aaaa/bbbb", opts)
+
+	c.Assert(func() { GetOrCreatePartition[string, testItem](cache, "foo bar", opts) }, qt.PanicMatches, ".*invalid partition name.*")
+	c.Assert(func() { GetOrCreatePartition[string, testItem](cache, "/aaaa/cccc", OptionsPartition{Weight: 1234}) }, qt.PanicMatches, ".*invalid Weight.*")
+
+	c.Assert(p2, qt.Equals, p1)
+
+	p3 := GetOrCreatePartition[string, testItem](cache, "/aaaa/cccc", opts)
+	c.Assert(p3, qt.Not(qt.IsNil))
+	c.Assert(p3, qt.Not(qt.Equals), p1)
+
+	c.Assert(func() { New(Options{}) }, qt.PanicMatches, ".*nil Log.*")
+}
+
+func TestCalculateMaxSizePerPartition(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+
+	c.Assert(calculateMaxSizePerPartition(1000, 500, 5), qt.Equals, 200)
+	c.Assert(calculateMaxSizePerPartition(1000, 250, 5), qt.Equals, 400)
+	c.Assert(func() { calculateMaxSizePerPartition(1000, 250, 0) }, qt.PanicMatches, ".*must be > 0.*")
+	c.Assert(func() { calculateMaxSizePerPartition(1000, 0, 1) }, qt.PanicMatches, ".*must be > 0.*")
+}
+
+func TestCleanKey(t *testing.T) {
+	c := qt.New(t)
+
+	c.Assert(CleanKey("a/b/c"), qt.Equals, "/a/b/c")
+	c.Assert(CleanKey("/a/b/c"), qt.Equals, "/a/b/c")
+	c.Assert(CleanKey("a/b/c/"), qt.Equals, "/a/b/c")
+	c.Assert(CleanKey(filepath.FromSlash("/a/b/c/")), qt.Equals, "/a/b/c")
+}
+
+func newTestCache(t *testing.T) *Cache {
+	cache := New(
+		Options{
+			Log: loggers.NewDefault(),
+		},
+	)
+
+	p1 := GetOrCreatePartition[string, testItem](cache, "/aaaa/bbbb", OptionsPartition{Weight: 30, ClearWhen: ClearOnRebuild})
+	p2 := GetOrCreatePartition[string, testItem](cache, "/aaaa/cccc", OptionsPartition{Weight: 30, ClearWhen: ClearOnChange})
+
+	p1.GetOrCreate("clearOnRebuild", func(string) (testItem, error) {
+		return testItem{}, nil
+	})
+
+	p2.GetOrCreate("clearBecauseStale", func(string) (testItem, error) {
+		return testItem{
+			isStale: true,
+		}, nil
+	})
+
+	p2.GetOrCreate("clearBecauseIdentityChanged", func(string) (testItem, error) {
+		return testItem{
+			name: "changed",
+		}, nil
+	})
+
+	p2.GetOrCreate("clearNever", func(string) (testItem, error) {
+		return testItem{
+			isStale: false,
+		}, nil
+	})
+
+	t.Cleanup(func() {
+		cache.Stop()
+	})
+
+	return cache
+}
+
+func TestClear(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+
+	predicateAll := func(string) bool {
+		return true
+	}
+
+	cache := newTestCache(t)
+
+	c.Assert(cache.Keys(predicateAll), qt.HasLen, 4)
+
+	cache.ClearOnRebuild()
+
+	// Stale items are always cleared.
+	c.Assert(cache.Keys(predicateAll), qt.HasLen, 2)
+
+	cache = newTestCache(t)
+	cache.ClearOnRebuild(identity.StringIdentity("changed"))
+
+	c.Assert(cache.Keys(nil), qt.HasLen, 1)
+
+	cache = newTestCache(t)
+
+	cache.ClearMatching(func(k, v any) bool {
+		return k.(string) == "clearOnRebuild"
+	})
+
+	c.Assert(cache.Keys(predicateAll), qt.HasLen, 3)
+
+	cache.adjustCurrentMaxSize()
+}
+
+func TestAdjustCurrentMaxSize(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+	cache := newTestCache(t)
+	alloc := cache.stats.memstatsCurrent.Alloc
+	cache.adjustCurrentMaxSize()
+	c.Assert(cache.stats.memstatsCurrent.Alloc, qt.Not(qt.Equals), alloc)
+}

cache/filecache/filecache.go

@@ -24,6 +24,7 @@ import (
 	"time"
 
 	"github.com/gohugoio/hugo/common/hugio"
+	"github.com/gohugoio/hugo/hugofs"
 
 	"github.com/gohugoio/hugo/helpers"
 
@@ -109,7 +110,7 @@ func (l *lockedFile) Close() error {
 func (c *Cache) init() error {
 	c.initOnce.Do(func() {
 		// Create the base dir if it does not exist.
-		if err := c.Fs.MkdirAll("", 0777); err != nil && !os.IsExist(err) {
+		if err := c.Fs.MkdirAll("", 0o777); err != nil && !os.IsExist(err) {
 			c.initErr = err
 		}
 	})
@@ -146,7 +147,8 @@ func (c *Cache) WriteCloser(id string) (ItemInfo, io.WriteCloser, error) {
 // it when done.
 func (c *Cache) ReadOrCreate(id string,
 	read func(info ItemInfo, r io.ReadSeeker) error,
-	create func(info ItemInfo, w io.WriteCloser) error) (info ItemInfo, err error) {
+	create func(info ItemInfo, w io.WriteCloser) error,
+) (info ItemInfo, err error) {
 	if err := c.init(); err != nil {
 		return ItemInfo{}, err
 	}
@@ -380,7 +382,7 @@ func NewCaches(p *helpers.PathSpec) (Caches, error) {
 
 		baseDir := v.DirCompiled
 
-		bfs := afero.NewBasePathFs(cfs, baseDir)
+		bfs := hugofs.NewBasePathFs(cfs, baseDir)
 
 		var pruneAllRootDir string
 		if k == CacheKeyModules {

cache/filecache/filecache_test.go

@@ -1,4 +1,4 @@
-// Copyright 2018 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -17,7 +17,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"path/filepath"
 	"strings"
 	"sync"
 	"testing"
@@ -86,17 +85,8 @@ dir = ":cacheDir/c"
 		cache := caches.Get("GetJSON")
 		c.Assert(cache, qt.Not(qt.IsNil))
 
-		bfs, ok := cache.Fs.(*afero.BasePathFs)
-		c.Assert(ok, qt.Equals, true)
-		filename, err := bfs.RealPath("key")
-		c.Assert(err, qt.IsNil)
-
 		cache = caches.Get("Images")
 		c.Assert(cache, qt.Not(qt.IsNil))
-		bfs, ok = cache.Fs.(*afero.BasePathFs)
-		c.Assert(ok, qt.Equals, true)
-		filename, _ = bfs.RealPath("key")
-		c.Assert(filename, qt.Equals, filepath.FromSlash("_gen/images/key"))
 
 		rf := func(s string) func() (io.ReadCloser, error) {
 			return func() (io.ReadCloser, error) {

cache/filecache/integration_test.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -15,7 +15,6 @@ package filecache_test
 
 import (
 	"path/filepath"
-
 	"testing"
 	"time"
 
@@ -47,7 +46,6 @@ title: "Home"
 	_, err := b.H.BaseFs.ResourcesCache.Stat(filepath.Join("_gen", "images"))
 
 	b.Assert(err, qt.IsNil)
-
 }
 
 func TestPruneImages(t *testing.T) {
@@ -55,6 +53,7 @@ func TestPruneImages(t *testing.T) {
 		// TODO(bep)
 		t.Skip("skip flaky test on CI server")
 	}
+	t.Skip("skip flaky test")
 	files := `
 -- hugo.toml --
 baseURL = "https://example.com"
@@ -92,7 +91,7 @@ iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNkYPhfDwAChwGA60e6kgAA
 
 	// TODO(bep) we need a way to test full rebuilds.
 	// For now, just sleep a little so the cache elements expires.
-	time.Sleep(300 * time.Millisecond)
+	time.Sleep(500 * time.Millisecond)
 
 	b.RenameFile("assets/a/pixel.png", "assets/b/pixel2.png").Build()
 
@@ -104,5 +103,4 @@ iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNkYPhfDwAChwGA60e6kgAA
 	b.Assert(err, qt.Not(qt.IsNil))
 	_, err = b.H.BaseFs.ResourcesCache.Stat(imagesCacheDir)
 	b.Assert(err, qt.IsNil)
-
 }

cache/namedmemcache/named_cache.go

@@ -1,78 +0,0 @@
-// Copyright 2018 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Package namedmemcache provides a memory cache with a named lock. This is suitable
-// for situations where creating the cached resource can be time consuming or otherwise
-// resource hungry, or in situations where a "once only per key" is a requirement.
-package namedmemcache
-
-import (
-	"sync"
-
-	"github.com/BurntSushi/locker"
-)
-
-// Cache holds the cached values.
-type Cache struct {
-	nlocker *locker.Locker
-	cache   map[string]cacheEntry
-	mu      sync.RWMutex
-}
-
-type cacheEntry struct {
-	value any
-	err   error
-}
-
-// New creates a new cache.
-func New() *Cache {
-	return &Cache{
-		nlocker: locker.NewLocker(),
-		cache:   make(map[string]cacheEntry),
-	}
-}
-
-// Clear clears the cache state.
-func (c *Cache) Clear() {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
-	c.cache = make(map[string]cacheEntry)
-	c.nlocker = locker.NewLocker()
-}
-
-// GetOrCreate tries to get the value with the given cache key, if not found
-// create will be called and cached.
-// This method is thread safe. It also guarantees that the create func for a given
-// key is invoked only once for this cache.
-func (c *Cache) GetOrCreate(key string, create func() (any, error)) (any, error) {
-	c.mu.RLock()
-	entry, found := c.cache[key]
-	c.mu.RUnlock()
-
-	if found {
-		return entry.value, entry.err
-	}
-
-	c.nlocker.Lock(key)
-	defer c.nlocker.Unlock(key)
-
-	// Create it.
-	value, err := create()
-
-	c.mu.Lock()
-	c.cache[key] = cacheEntry{value: value, err: err}
-	c.mu.Unlock()
-
-	return value, err
-}

cache/namedmemcache/named_cache_test.go

@@ -1,80 +0,0 @@
-// Copyright 2018 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package namedmemcache
-
-import (
-	"fmt"
-	"sync"
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-)
-
-func TestNamedCache(t *testing.T) {
-	t.Parallel()
-	c := qt.New(t)
-
-	cache := New()
-
-	counter := 0
-	create := func() (any, error) {
-		counter++
-		return counter, nil
-	}
-
-	for i := 0; i < 5; i++ {
-		v1, err := cache.GetOrCreate("a1", create)
-		c.Assert(err, qt.IsNil)
-		c.Assert(v1, qt.Equals, 1)
-		v2, err := cache.GetOrCreate("a2", create)
-		c.Assert(err, qt.IsNil)
-		c.Assert(v2, qt.Equals, 2)
-	}
-
-	cache.Clear()
-
-	v3, err := cache.GetOrCreate("a2", create)
-	c.Assert(err, qt.IsNil)
-	c.Assert(v3, qt.Equals, 3)
-}
-
-func TestNamedCacheConcurrent(t *testing.T) {
-	t.Parallel()
-
-	c := qt.New(t)
-
-	var wg sync.WaitGroup
-
-	cache := New()
-
-	create := func(i int) func() (any, error) {
-		return func() (any, error) {
-			return i, nil
-		}
-	}
-
-	for i := 0; i < 10; i++ {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			for j := 0; j < 100; j++ {
-				id := fmt.Sprintf("id%d", j)
-				v, err := cache.GetOrCreate(id, create(j))
-				c.Assert(err, qt.IsNil)
-				c.Assert(v, qt.Equals, j)
-			}
-		}()
-	}
-	wg.Wait()
-}

commands/commandeer.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -259,7 +259,7 @@ func (r *rootCommand) ConfigFromProvider(key int32, cfg config.Provider) (*commo
 			publishDirStatic := cfg.GetString("publishDirStatic")
 			workingDir := cfg.GetString("workingDir")
 			absPublishDirStatic := paths.AbsPathify(workingDir, publishDirStatic)
-			staticFs := afero.NewBasePathFs(afero.NewOsFs(), absPublishDirStatic)
+			staticFs := hugofs.NewBasePathFs(afero.NewOsFs(), absPublishDirStatic)
 
 			// Serve from both the static and dynamic fs,
 			// the first will take priority.
@@ -405,8 +405,14 @@ func (r *rootCommand) PreRun(cd, runner *simplecobra.Commandeer) error {
 		return err
 	}
 
-	r.commonConfigs = lazycache.New[int32, *commonConfig](lazycache.Options{MaxEntries: 5})
+	r.commonConfigs = lazycache.New(lazycache.Options[int32, *commonConfig]{MaxEntries: 5})
-	r.hugoSites = lazycache.New[int32, *hugolib.HugoSites](lazycache.Options{MaxEntries: 5})
+	// We don't want to keep stale HugoSites in memory longer than needed.
+	r.hugoSites = lazycache.New(lazycache.Options[int32, *hugolib.HugoSites]{
+		MaxEntries: 1,
+		OnEvict: func(key int32, value *hugolib.HugoSites) {
+			value.Close()
+		},
+	})
 
 	return nil
 }

commands/commands.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -37,5 +37,4 @@ func newExec() (*simplecobra.Exec, error) {
 	}
 
 	return simplecobra.New(rootCmd)
-
 }

commands/config.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -37,7 +37,6 @@ func newConfigCommand() *configCommand {
 			&configMountsCommand{},
 		},
 	}
-
 }
 
 type configCommand struct {
@@ -190,7 +189,6 @@ func (m *configModMounts) MarshalJSON() ([]byte, error) {
 		Dir:     m.m.Dir(),
 		Mounts:  mounts,
 	})
-
 }
 
 type configMountsCommand struct {

commands/convert.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -134,7 +134,7 @@ func (c *convertCommand) convertAndSavePage(p page.Page, site *hugolib.Site, tar
 		}
 	}
 
-	if p.File().IsZero() {
+	if p.File() == nil {
 		// No content file.
 		return nil
 	}
@@ -209,7 +209,7 @@ func (c *convertCommand) convertContents(format metadecoders.Format) error {
 
 	var pagesBackedByFile page.Pages
 	for _, p := range site.AllPages() {
-		if p.File().IsZero() {
+		if p.File() == nil {
 			continue
 		}
 		pagesBackedByFile = append(pagesBackedByFile, p)

commands/deploy.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -14,7 +14,7 @@
 //go:build !nodeploy
 // +build !nodeploy
 
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -38,7 +38,6 @@ import (
 )
 
 func newDeployCommand() simplecobra.Commander {
-
 	return &simpleCommand{
 		name:  "deploy",
 		short: "Deploy your site to a Cloud provider.",

commands/deploy_off.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -14,7 +14,7 @@
 //go:build nodeploy
 // +build nodeploy
 
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

commands/env.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

commands/gen.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -101,7 +101,7 @@ See https://xyproto.github.io/splash/docs/all.html for a preview of the availabl
 				}
 				if found, _ := helpers.Exists(genmandir, hugofs.Os); !found {
 					r.Println("Directory", genmandir, "does not exist, creating...")
-					if err := hugofs.Os.MkdirAll(genmandir, 0777); err != nil {
+					if err := hugofs.Os.MkdirAll(genmandir, 0o777); err != nil {
 						return err
 					}
 				}
@@ -150,7 +150,7 @@ url: %s
 				}
 				if found, _ := helpers.Exists(gendocdir, hugofs.Os); !found {
 					r.Println("Directory", gendocdir, "does not exist, creating...")
-					if err := hugofs.Os.MkdirAll(gendocdir, 0777); err != nil {
+					if err := hugofs.Os.MkdirAll(gendocdir, 0o777); err != nil {
 						return err
 					}
 				}
@@ -177,7 +177,6 @@ url: %s
 				cmd.PersistentFlags().SetAnnotation("dir", cobra.BashCompSubdirsInDir, []string{})
 			},
 		}
-
 	}
 
 	var docsHelperTarget string
@@ -241,7 +240,6 @@ url: %s
 			newDocsHelper(),
 		},
 	}
-
 }
 
 type genCommand struct {

commands/helpers.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -110,12 +110,11 @@ func flagsToCfgWithAdditionalConfigBase(cd *simplecobra.Commandeer, cfg config.P
 	})
 
 	return cfg
-
 }
 
 func mkdir(x ...string) {
 	p := filepath.Join(x...)
-	err := os.MkdirAll(p, 0777) // before umask
+	err := os.MkdirAll(p, 0o777) // before umask
 	if err != nil {
 		log.Fatal(err)
 	}

commands/hugo_windows.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

commands/hugobuilder.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -24,6 +24,7 @@ import (
 	"runtime/trace"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/bep/logg"
@@ -34,6 +35,7 @@ import (
 	"github.com/gohugoio/hugo/common/hugo"
 	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/common/maps"
+	"github.com/gohugoio/hugo/common/paths"
 	"github.com/gohugoio/hugo/common/terminal"
 	"github.com/gohugoio/hugo/common/types"
 	"github.com/gohugoio/hugo/config"
@@ -83,7 +85,6 @@ func (c *hugoBuilder) withConf(fn func(conf *commonConfig)) {
 	c.confmu.Lock()
 	defer c.confmu.Unlock()
 	fn(c.conf)
-
 }
 
 type hugoBuilderErrState struct {
@@ -135,46 +136,12 @@ func (c *hugoBuilder) errCount() int {
 
 // getDirList provides NewWatcher() with a list of directories to watch for changes.
 func (c *hugoBuilder) getDirList() ([]string, error) {
-	var filenames []string
-
-	walkFn := func(path string, fi hugofs.FileMetaInfo, err error) error {
-		if err != nil {
-			c.r.logger.Errorln("walker: ", err)
-			return nil
-		}
-
-		if fi.IsDir() {
-			if fi.Name() == ".git" ||
-				fi.Name() == "node_modules" || fi.Name() == "bower_components" {
-				return filepath.SkipDir
-			}
-
-			filenames = append(filenames, fi.Meta().Filename)
-		}
-
-		return nil
-	}
-
 	h, err := c.hugo()
 	if err != nil {
 		return nil, err
 	}
-	watchFiles := h.PathSpec.BaseFs.WatchDirs()
-	for _, fi := range watchFiles {
-		if !fi.IsDir() {
-			filenames = append(filenames, fi.Meta().Filename)
-			continue
-		}
 
-		w := hugofs.NewWalkway(hugofs.WalkwayConfig{Logger: c.r.logger, Info: fi, WalkFn: walkFn})
+	return helpers.UniqueStringsSorted(h.PathSpec.BaseFs.WatchFilenames()), nil
-		if err := w.Walk(); err != nil {
-			c.r.logger.Errorln("walker: ", err)
-		}
-	}
-
-	filenames = helpers.UniqueStringsSorted(filenames)
-
-	return filenames, nil
 }
 
 func (c *hugoBuilder) initCPUProfile() (func(), error) {
@@ -441,7 +408,7 @@ func (c *hugoBuilder) copyStatic() (map[string]uint64, error) {
 }
 
 func (c *hugoBuilder) copyStaticTo(sourceFs *filesystems.SourceFilesystem) (uint64, error) {
-	infol := c.r.logger.InfoCommand("copy static")
+	infol := c.r.logger.InfoCommand("static")
 	publishDir := helpers.FilePathSeparator
 
 	if sourceFs.PublishFolder != "" {
@@ -467,11 +434,11 @@ func (c *hugoBuilder) copyStaticTo(sourceFs *filesystems.SourceFilesystem) (uint
 	if syncer.Delete {
 		infol.Logf("removing all files from destination that don't exist in static dirs")
 
-		syncer.DeleteFilter = func(f os.FileInfo) bool {
+		syncer.DeleteFilter = func(f fsync.FileInfo) bool {
 			return f.IsDir() && strings.HasPrefix(f.Name(), ".")
 		}
 	}
-	infol.Logf("syncing static files to %s", publishDir)
+	start := time.Now()
 
 	// because we are using a baseFs (to get the union right).
 	// set sync src to root
@@ -479,9 +446,10 @@ func (c *hugoBuilder) copyStaticTo(sourceFs *filesystems.SourceFilesystem) (uint
 	if err != nil {
 		return 0, err
 	}
+	loggers.TimeTrackf(infol, start, nil, "syncing static files to %s", publishDir)
 
-	// Sync runs Stat 3 times for every source file (which sounds much)
+	// Sync runs Stat 2 times for every source file.
-	numFiles := fs.statCounter / 3
+	numFiles := fs.statCounter / 2
 
 	return numFiles, err
 }
@@ -652,13 +620,31 @@ func (c *hugoBuilder) handleBuildErr(err error, msg string) {
 func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 	staticSyncer *staticSyncer,
 	evs []fsnotify.Event,
-	configSet map[string]bool) {
+	configSet map[string]bool,
+) {
 	defer func() {
 		c.errState.setWasErr(false)
 	}()
 
 	var isHandled bool
 
+	// Filter out ghost events (from deleted, renamed directories).
+	// This seems to be a bug in fsnotify, or possibly MacOS.
+	var n int
+	for _, ev := range evs {
+		keep := true
+		if ev.Has(fsnotify.Create) || ev.Has(fsnotify.Write) {
+			if _, err := os.Stat(ev.Name); err != nil {
+				keep = false
+			}
+		}
+		if keep {
+			evs[n] = ev
+			n++
+		}
+	}
+	evs = evs[:n]
+
 	for _, ev := range evs {
 		isConfig := configSet[ev.Name]
 		configChangeType := configChangeConfig
@@ -726,48 +712,25 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 		return
 	}
 
-	c.r.logger.Infoln("Received System Events:", evs)
+	c.r.logger.Debugln("Received System Events:", evs)
 
 	staticEvents := []fsnotify.Event{}
 	dynamicEvents := []fsnotify.Event{}
 
-	filtered := []fsnotify.Event{}
 	h, err := c.hugo()
 	if err != nil {
 		c.r.logger.Errorln("Error getting the Hugo object:", err)
 		return
 	}
+	n = 0
 	for _, ev := range evs {
 		if h.ShouldSkipFileChangeEvent(ev) {
 			continue
 		}
-		// Check the most specific first, i.e. files.
+		evs[n] = ev
-		contentMapped := h.ContentChanges.GetSymbolicLinkMappings(ev.Name)
+		n++
-		if len(contentMapped) > 0 {
-			for _, mapped := range contentMapped {
-				filtered = append(filtered, fsnotify.Event{Name: mapped, Op: ev.Op})
-			}
-			continue
-		}
-
-		// Check for any symbolic directory mapping.
-
-		dir, name := filepath.Split(ev.Name)
-
-		contentMapped = h.ContentChanges.GetSymbolicLinkMappings(dir)
-
-		if len(contentMapped) == 0 {
-			filtered = append(filtered, ev)
-			continue
-		}
-
-		for _, mapped := range contentMapped {
-			mappedFilename := filepath.Join(mapped, name)
-			filtered = append(filtered, fsnotify.Event{Name: mappedFilename, Op: ev.Op})
-		}
 	}
-
+	evs = evs[:n]
-	evs = filtered
 
 	for _, ev := range evs {
 		ext := filepath.Ext(ev.Name)
@@ -788,6 +751,7 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 		if istemp {
 			continue
 		}
+
 		if h.Deps.SourceSpec.IgnoreFile(ev.Name) {
 			continue
 		}
@@ -811,7 +775,7 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 			continue
 		}
 
-		walkAdder := func(path string, f hugofs.FileMetaInfo, err error) error {
+		walkAdder := func(path string, f hugofs.FileMetaInfo) error {
 			if f.IsDir() {
 				c.r.logger.Println("adding created directory to watchlist", path)
 				if err := watcher.Add(path); err != nil {
@@ -827,11 +791,10 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 		}
 
 		// recursively add new directories to watch list
-		// When mkdir -p is used, only the top directory triggers an event (at least on OSX)
+		if ev.Has(fsnotify.Create) || ev.Has(fsnotify.Rename) {
-		if ev.Op&fsnotify.Create == fsnotify.Create {
 			c.withConf(func(conf *commonConfig) {
 				if s, err := conf.fs.Source.Stat(ev.Name); err == nil && s.Mode().IsDir() {
-					_ = helpers.SymbolicWalk(conf.fs.Source, ev.Name, walkAdder)
+					_ = helpers.Walk(conf.fs.Source, ev.Name, walkAdder)
 				}
 			})
 		}
@@ -872,7 +835,7 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 					return
 				}
 				path := h.BaseFs.SourceFilesystems.MakeStaticPathRelative(ev.Name)
-				path = h.RelURL(helpers.ToSlashTrimLeading(path), false)
+				path = h.RelURL(paths.ToSlashTrimLeading(path), false)
 
 				livereload.RefreshPath(path)
 			} else {
@@ -909,7 +872,7 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 					// Nothing has changed.
 					return
 				} else if len(changed) == 1 {
-					pathToRefresh := h.PathSpec.RelURL(helpers.ToSlashTrimLeading(changed[0]), false)
+					pathToRefresh := h.PathSpec.RelURL(paths.ToSlashTrimLeading(changed[0]), false)
 					livereload.RefreshPath(pathToRefresh)
 				} else {
 					livereload.ForceRefresh()
@@ -944,7 +907,6 @@ func (c *hugoBuilder) hugo() (*hugolib.HugoSites, error) {
 		var err error
 		h, err = c.r.HugFromConfig(conf)
 		return err
-
 	}); err != nil {
 		return nil, err
 	}
@@ -1000,6 +962,7 @@ func (c *hugoBuilder) loadConfig(cd *simplecobra.Commandeer, running bool) error
 	}
 
 	if len(conf.configs.LoadingInfo.ConfigFiles) == 0 {
+		//lint:ignore ST1005 end user message.
 		return errors.New("Unable to locate config file or config directory. Perhaps you need to create a new site.\nRun `hugo help new` for details.")
 	}
 
@@ -1011,15 +974,16 @@ func (c *hugoBuilder) loadConfig(cd *simplecobra.Commandeer, running bool) error
 	}
 
 	return nil
-
 }
 
+var rebuildCounter atomic.Uint64
+
 func (c *hugoBuilder) printChangeDetected(typ string) {
 	msg := "\nChange"
 	if typ != "" {
 		msg += " of " + typ
 	}
-	msg += " detected, rebuilding site."
+	msg += fmt.Sprintf(" detected, rebuilding site (#%d).", rebuildCounter.Add(1))
 
 	c.r.logger.Println(msg)
 	const layout = "2006-01-02 15:04:05.000 -0700"
@@ -1034,25 +998,12 @@ func (c *hugoBuilder) rebuildSites(events []fsnotify.Event) error {
 		}
 	}
 	c.errState.setBuildErr(nil)
-	visited := c.visitedURLs.PeekAllSet()
 	h, err := c.hugo()
 	if err != nil {
 		return err
 	}
-	if c.fastRenderMode {
+
-		c.withConf(func(conf *commonConfig) {
+	return h.Build(hugolib.BuildCfg{NoBuildLock: true, RecentlyVisited: c.visitedURLs, ErrRecovery: c.errState.wasErr()}, events...)
-			// Make sure we always render the home pages
-			for _, l := range conf.configs.ConfigLangs() {
-				langPath := l.LanguagePrefix()
-				if langPath != "" {
-					langPath = langPath + "/"
-				}
-				home := h.PrependBasePath("/"+langPath, false)
-				visited[home] = true
-			}
-		})
-	}
-	return h.Build(hugolib.BuildCfg{NoBuildLock: true, RecentlyVisited: visited, ErrRecovery: c.errState.wasErr()}, events...)
 }
 
 func (c *hugoBuilder) reloadConfig() error {

commands/import.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -23,7 +23,6 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
-
 	"strconv"
 	"strings"
 	"time"
@@ -66,7 +65,6 @@ Import from Jekyll requires two paths, e.g. ` + "`hugo import jekyll jekyll_root
 	}
 
 	return c
-
 }
 
 type importCommand struct {
@@ -312,7 +310,7 @@ func (c *importCommand) convertJekyllPost(path, relPath, targetDir string, draft
 
 	targetFile := filepath.Join(targetDir, relPath)
 	targetParentDir := filepath.Dir(targetFile)
-	os.MkdirAll(targetParentDir, 0777)
+	os.MkdirAll(targetParentDir, 0o777)
 
 	contentBytes, err := os.ReadFile(path)
 	if err != nil {
@@ -398,7 +396,6 @@ func (c *importCommand) copyJekyllFilesAndFolders(jekyllRoot, dest string, jekyl
 }
 
 func (c *importCommand) importFromJekyll(args []string) error {
-
 	jekyllRoot, err := filepath.Abs(filepath.Clean(args[0]))
 	if err != nil {
 		return newUserError("path error:", args[0])
@@ -429,11 +426,7 @@ func (c *importCommand) importFromJekyll(args []string) error {
 	c.r.Println("Importing...")
 
 	fileCount := 0
-	callback := func(path string, fi hugofs.FileMetaInfo, err error) error {
+	callback := func(path string, fi hugofs.FileMetaInfo) error {
-		if err != nil {
-			return err
-		}
-
 		if fi.IsDir() {
 			return nil
 		}
@@ -462,7 +455,7 @@ func (c *importCommand) importFromJekyll(args []string) error {
 
 	for jekyllPostDir, hasAnyPostInDir := range jekyllPostDirs {
 		if hasAnyPostInDir {
-			if err = helpers.SymbolicWalk(hugofs.Os, filepath.Join(jekyllRoot, jekyllPostDir), callback); err != nil {
+			if err = helpers.Walk(hugofs.Os, filepath.Join(jekyllRoot, jekyllPostDir), callback); err != nil {
 				return err
 			}
 		}

commands/list.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -31,7 +31,6 @@ import (
 
 // newListCommand creates a new list command and its subcommands.
 func newListCommand() *listCommand {
-
 	createRecord := func(workingDir string, p page.Page) []string {
 		return []string{
 			filepath.ToSlash(strings.TrimPrefix(p.File().Filename(), workingDir+string(os.PathSeparator))),
@@ -83,7 +82,6 @@ func newListCommand() *listCommand {
 		}
 
 		return nil
-
 	}
 
 	return &listCommand{
@@ -94,11 +92,10 @@ func newListCommand() *listCommand {
 				long:  `List all of the drafts in your content directory.`,
 				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
 					shouldInclude := func(p page.Page) bool {
-						if !p.Draft() || p.File().IsZero() {
+						if !p.Draft() || p.File() == nil {
 							return false
 						}
 						return true
-
 					}
 					return list(cd, r, shouldInclude,
 						"buildDrafts", true,
@@ -113,11 +110,10 @@ func newListCommand() *listCommand {
 				long:  `List all of the posts in your content directory which will be posted in the future.`,
 				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
 					shouldInclude := func(p page.Page) bool {
-						if !resource.IsFuture(p) || p.File().IsZero() {
+						if !resource.IsFuture(p) || p.File() == nil {
 							return false
 						}
 						return true
-
 					}
 					return list(cd, r, shouldInclude,
 						"buildFuture", true,
@@ -131,7 +127,7 @@ func newListCommand() *listCommand {
 				long:  `List all of the posts in your content directory which has already expired.`,
 				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
 					shouldInclude := func(p page.Page) bool {
-						if !resource.IsExpired(p) || p.File().IsZero() {
+						if !resource.IsExpired(p) || p.File() == nil {
 							return false
 						}
 						return true
@@ -148,14 +144,13 @@ func newListCommand() *listCommand {
 				long:  `List all of the posts in your content directory, include drafts, future and expired pages.`,
 				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
 					shouldInclude := func(p page.Page) bool {
-						return !p.File().IsZero()
+						return p.File() != nil
 					}
 					return list(cd, r, shouldInclude, "buildDrafts", true, "buildFuture", true, "buildExpired", true)
 				},
 			},
 		},
 	}
-
 }
 
 type listCommand struct {

commands/mod.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -69,7 +69,7 @@ so this may/will change in future versions of Hugo.
 					if err != nil {
 						return err
 					}
-					return npm.Pack(h.BaseFs.SourceFs, h.BaseFs.Assets.Dirs)
+					return npm.Pack(h.BaseFs.ProjectSourceFs, h.BaseFs.AssetsWithDuplicatesPreserved.Fs)
 				},
 			},
 		},

commands/new.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -64,7 +64,6 @@ Ensure you run this within the root directory of your site.`,
 					cmd.Flags().String("editor", "", "edit new content with this editor, if provided")
 					cmd.Flags().BoolVarP(&force, "force", "f", false, "overwrite file if it already exists")
 					applyLocalFlagsBuildConfig(cmd, r)
-
 				},
 			},
 			&simpleCommand{
@@ -143,7 +142,6 @@ according to your needs.`,
 	}
 
 	return c
-
 }
 
 type newCommand struct {

commands/release.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -24,7 +24,6 @@ import (
 // Note: This is a command only meant for internal use and must be run
 // via "go run -tags release main.go release" on the actual code base that is in the release.
 func newReleaseCommand() simplecobra.Commander {
-
 	var (
 		step     int
 		skipPush bool

commands/server.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -27,20 +27,19 @@ import (
 	"net/http"
 	"net/url"
 	"os"
-	"sync"
-	"sync/atomic"
-
-	"github.com/bep/mclib"
-
 	"os/signal"
 	"path"
 	"path/filepath"
 	"regexp"
 	"strconv"
 	"strings"
+	"sync"
+	"sync/atomic"
 	"syscall"
 	"time"
 
+	"github.com/bep/mclib"
+
 	"github.com/bep/debounce"
 	"github.com/bep/simplecobra"
 	"github.com/fsnotify/fsnotify"
@@ -83,10 +82,14 @@ const (
 )
 
 func newHugoBuilder(r *rootCommand, s *serverCommand, onConfigLoaded ...func(reloaded bool) error) *hugoBuilder {
+	var visitedURLs *types.EvictingStringQueue
+	if s != nil && !s.disableFastRender {
+		visitedURLs = types.NewEvictingStringQueue(20)
+	}
 	return &hugoBuilder{
 		r:              r,
 		s:              s,
-		visitedURLs:    types.NewEvictingStringQueue(100),
+		visitedURLs:    visitedURLs,
 		fullRebuildSem: semaphore.NewWeighted(1),
 		debounce:       debounce.New(4 * time.Second),
 		onConfigLoaded: func(reloaded bool) error {
@@ -120,7 +123,6 @@ func newServerCommand() *serverCommand {
 				},
 				withc: func(cmd *cobra.Command, r *rootCommand) {
 					cmd.Flags().BoolVar(&uninstall, "uninstall", false, "Uninstall the local CA (but do not delete it).")
-
 				},
 			},
 		},
@@ -219,7 +221,7 @@ func (f *fileChangeDetector) filterIrrelevant(in []string) []string {
 }
 
 type fileServer struct {
-	baseURLs      []string
+	baseURLs      []urls.BaseURL
 	roots         []string
 	errorTemplate func(err any) (io.Reader, error)
 	c             *serverCommand
@@ -255,12 +257,6 @@ func (f *fileServer) createEndpoint(i int) (*http.ServeMux, net.Listener, string
 		r.Println("Running in Fast Render Mode. For full rebuilds on change: hugo server --disableFastRender")
 	}
 
-	// We're only interested in the path
-	u, err := url.Parse(baseURL)
-	if err != nil {
-		return nil, nil, "", "", fmt.Errorf("invalid baseURL: %w", err)
-	}
-
 	decorate := func(h http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			if f.c.showErrorInBrowser {
@@ -280,7 +276,7 @@ func (f *fileServer) createEndpoint(i int) (*http.ServeMux, net.Listener, string
 							port = lrport
 						}
 					})
-					lr := *u
+					lr := baseURL.URL()
 					lr.Host = fmt.Sprintf("%s:%d", lr.Hostname(), port)
 					fmt.Fprint(w, injectLiveReloadScript(r, lr))
 
@@ -311,7 +307,7 @@ func (f *fileServer) createEndpoint(i int) (*http.ServeMux, net.Listener, string
 				// This matches Netlify's behaviour and is needed for SPA behaviour.
 				// See https://docs.netlify.com/routing/redirects/rewrites-proxies/
 				if !redirect.Force {
-					path := filepath.Clean(strings.TrimPrefix(requestURI, u.Path))
+					path := filepath.Clean(strings.TrimPrefix(requestURI, baseURL.Path()))
 					if root != "" {
 						path = filepath.Join(root, path)
 					}
@@ -338,7 +334,7 @@ func (f *fileServer) createEndpoint(i int) (*http.ServeMux, net.Listener, string
 					switch redirect.Status {
 					case 404:
 						w.WriteHeader(404)
-						file, err := fs.Open(strings.TrimPrefix(redirect.To, u.Path))
+						file, err := fs.Open(strings.TrimPrefix(redirect.To, baseURL.Path()))
 						if err == nil {
 							defer file.Close()
 							io.Copy(w, file)
@@ -347,7 +343,7 @@ func (f *fileServer) createEndpoint(i int) (*http.ServeMux, net.Listener, string
 						}
 						return
 					case 200:
-						if r2 := f.rewriteRequest(r, strings.TrimPrefix(redirect.To, u.Path)); r2 != nil {
+						if r2 := f.rewriteRequest(r, strings.TrimPrefix(redirect.To, baseURL.Path())); r2 != nil {
 							requestURI = redirect.To
 							r = r2
 						}
@@ -385,10 +381,10 @@ func (f *fileServer) createEndpoint(i int) (*http.ServeMux, net.Listener, string
 
 	fileserver := decorate(http.FileServer(fs))
 	mu := http.NewServeMux()
-	if u.Path == "" || u.Path == "/" {
+	if baseURL.Path() == "" || baseURL.Path() == "/" {
 		mu.Handle("/", fileserver)
 	} else {
-		mu.Handle(u.Path, http.StripPrefix(u.Path, fileserver))
+		mu.Handle(baseURL.Path(), http.StripPrefix(baseURL.Path(), fileserver))
 	}
 	if r.IsTestRun() {
 		var shutDownOnce sync.Once
@@ -401,7 +397,7 @@ func (f *fileServer) createEndpoint(i int) (*http.ServeMux, net.Listener, string
 
 	endpoint := net.JoinHostPort(f.c.serverInterface, strconv.Itoa(port))
 
-	return mu, listener, u.String(), endpoint, nil
+	return mu, listener, baseURL.String(), endpoint, nil
 }
 
 func (f *fileServer) rewriteRequest(r *http.Request, toPath string) *http.Request {
@@ -469,7 +465,6 @@ func (c *serverCommand) Name() string {
 }
 
 func (c *serverCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, args []string) error {
-
 	// Watch runs its own server as part of the routine
 	if c.serverWatch {
 
@@ -676,7 +671,7 @@ func (c *serverCommand) createCertificates(conf *commonConfig) error {
 
 	// Create the directory if it doesn't exist.
 	if _, err := os.Stat(keyDir); os.IsNotExist(err) {
-		if err := os.MkdirAll(keyDir, 0777); err != nil {
+		if err := os.MkdirAll(keyDir, 0o777); err != nil {
 			return err
 		}
 	}
@@ -701,7 +696,6 @@ func (c *serverCommand) createCertificates(conf *commonConfig) error {
 	// Yes, this is unfortunate, but it's currently the only way to use Mkcert as a library.
 	os.Args = []string{"-cert-file", c.tlsCertFile, "-key-file", c.tlsKeyFile, hostname}
 	return mclib.RunMain()
-
 }
 
 func (c *serverCommand) verifyCert(rootPEM, certPEM []byte, name string) error {
@@ -831,9 +825,9 @@ func (c *serverCommand) partialReRender(urls ...string) error {
 		c.errState.setWasErr(false)
 	}()
 	c.errState.setBuildErr(nil)
-	visited := make(map[string]bool)
+	visited := types.NewEvictingStringQueue(len(urls))
 	for _, url := range urls {
-		visited[url] = true
+		visited.Add(url)
 	}
 
 	h, err := c.hugo()
@@ -846,7 +840,7 @@ func (c *serverCommand) partialReRender(urls ...string) error {
 
 func (c *serverCommand) serve() error {
 	var (
-		baseURLs []string
+		baseURLs []urls.BaseURL
 		roots    []string
 		h        *hugolib.HugoSites
 	)
@@ -863,18 +857,17 @@ func (c *serverCommand) serve() error {
 
 		if isMultiHost {
 			for _, l := range conf.configs.ConfigLangs() {
-				baseURLs = append(baseURLs, l.BaseURL().String())
+				baseURLs = append(baseURLs, l.BaseURL())
 				roots = append(roots, l.Language().Lang)
 			}
 		} else {
 			l := conf.configs.GetFirstLanguageConfig()
-			baseURLs = []string{l.BaseURL().String()}
+			baseURLs = []urls.BaseURL{l.BaseURL()}
 			roots = []string{""}
 		}
 
 		return nil
 	})
-
 	if err != nil {
 		return err
 	}
@@ -946,13 +939,9 @@ func (c *serverCommand) serve() error {
 		servers = append(servers, srv)
 
 		if doLiveReload {
-			u, err := url.Parse(helpers.SanitizeURL(baseURLs[i]))
+			baseURL := baseURLs[i]
-			if err != nil {
+			mu.HandleFunc(baseURL.Path()+"livereload.js", livereload.ServeJS)
-				return err
+			mu.HandleFunc(baseURL.Path()+"livereload", livereload.Handler)
-			}
-
-			mu.HandleFunc(u.Path+"/livereload.js", livereload.ServeJS)
-			mu.HandleFunc(u.Path+"/livereload", livereload.Handler)
 		}
 		c.r.Printf("Web Server is available at %s (bind address %s) %s\n", serverURL, c.serverInterface, roots[i])
 		wg1.Go(func() error {
@@ -971,8 +960,12 @@ func (c *serverCommand) serve() error {
 	if c.r.IsTestRun() {
 		// Write a .ready file to disk to signal ready status.
 		// This is where the test is run from.
+		var baseURLs []string
+		for _, baseURL := range srv.baseURLs {
+			baseURLs = append(baseURLs, baseURL.String())
+		}
 		testInfo := map[string]any{
-			"baseURLs": srv.baseURLs,
+			"baseURLs": baseURLs,
 		}
 
 		dir := os.Getenv("WORK")
@@ -983,7 +976,7 @@ func (c *serverCommand) serve() error {
 			if err != nil {
 				return err
 			}
-			err = os.WriteFile(readyFile, b, 0777)
+			err = os.WriteFile(readyFile, b, 0o777)
 			if err != nil {
 				return err
 			}
@@ -1167,7 +1160,7 @@ func cleanErrorLog(content string) string {
 	return strings.Join(keep, ": ")
 }
 
-func injectLiveReloadScript(src io.Reader, baseURL url.URL) string {
+func injectLiveReloadScript(src io.Reader, baseURL *url.URL) string {
 	var b bytes.Buffer
 	chain := transform.Chain{livereloadinject.New(baseURL)}
 	chain.Apply(&b, src)

common/constants/constants.go

@@ -20,3 +20,24 @@ const (
 	ErrRemoteGetJSON = "error-remote-getjson"
 	ErrRemoteGetCSV  = "error-remote-getcsv"
 )
+
+// Field/method names with special meaning.
+const (
+	FieldRelPermalink = "RelPermalink"
+	FieldPermalink    = "Permalink"
+)
+
+// IsFieldRelOrPermalink returns whether the given name is a RelPermalink or Permalink.
+func IsFieldRelOrPermalink(name string) bool {
+	return name == FieldRelPermalink || name == FieldPermalink
+}
+
+// Resource transformations.
+const (
+	ResourceTransformationFingerprint = "fingerprint"
+)
+
+// IsResourceTransformationLinkChange returns whether the given name is a resource transformation that changes the permalink based on the content.
+func IsResourceTransformationPermalinkHash(name string) bool {
+	return name == ResourceTransformationFingerprint
+}

common/hcontext/context.go

@@ -0,0 +1,46 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hcontext
+
+import "context"
+
+// ContextDispatcher is a generic interface for setting and getting values from a context.
+type ContextDispatcher[T any] interface {
+	Set(ctx context.Context, value T) context.Context
+	Get(ctx context.Context) T
+}
+
+// NewContextDispatcher creates a new ContextDispatcher with the given key.
+func NewContextDispatcher[T any, R comparable](key R) ContextDispatcher[T] {
+	return keyInContext[T, R]{
+		id: key,
+	}
+}
+
+type keyInContext[T any, R comparable] struct {
+	zero T
+	id   R
+}
+
+func (f keyInContext[T, R]) Get(ctx context.Context) T {
+	v := ctx.Value(f.id)
+	if v == nil {
+		return f.zero
+	}
+	return v.(T)
+}
+
+func (f keyInContext[T, R]) Set(ctx context.Context, value T) context.Context {
+	return context.WithValue(ctx, f.id, value)
+}

common/herrors/error_locator.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -74,7 +74,6 @@ func ContainsMatcher(text string) func(m LineMatcher) int {
 // ErrorContext contains contextual information about an error. This will
 // typically be the lines surrounding some problem in a file.
 type ErrorContext struct {
-
 	// If a match will contain the matched line and up to 2 lines before and after.
 	// Will be empty if no match.
 	Lines []string

common/herrors/error_locator_test.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

common/herrors/errors.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@ import (
 	"os"
 	"runtime"
 	"runtime/debug"
+	"time"
 )
 
 // PrintStackTrace prints the current stacktrace to w.
@@ -47,6 +48,24 @@ func Recover(args ...any) {
 	}
 }
 
+// IsTimeoutError returns true if the given error is or contains a TimeoutError.
+func IsTimeoutError(err error) bool {
+	return errors.Is(err, &TimeoutError{})
+}
+
+type TimeoutError struct {
+	Duration time.Duration
+}
+
+func (e *TimeoutError) Error() string {
+	return fmt.Sprintf("timeout after %s", e.Duration)
+}
+
+func (e *TimeoutError) Is(target error) bool {
+	_, ok := target.(*TimeoutError)
+	return ok
+}
+
 // IsFeatureNotAvailableError returns true if the given error is or contains a FeatureNotAvailableError.
 func IsFeatureNotAvailableError(err error) bool {
 	return errors.Is(err, &FeatureNotAvailableError{})

common/herrors/errors_test.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -42,5 +42,4 @@ func TestIsFeatureNotAvailableError(t *testing.T) {
 	c.Assert(IsFeatureNotAvailableError(ErrFeatureNotAvailable), qt.Equals, true)
 	c.Assert(IsFeatureNotAvailableError(&FeatureNotAvailableError{}), qt.Equals, true)
 	c.Assert(IsFeatureNotAvailableError(errors.New("asdf")), qt.Equals, false)
-
 }

common/herrors/file_error.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -15,13 +15,13 @@ package herrors
 
 import (
 	"encoding/json"
-
+	"errors"
-	godartsassv1 "github.com/bep/godartsass"
-
 	"fmt"
 	"io"
 	"path/filepath"
 
+	godartsassv1 "github.com/bep/godartsass"
+
 	"github.com/bep/godartsass/v2"
 	"github.com/bep/golibsass/libsass/libsasserrors"
 	"github.com/gohugoio/hugo/common/paths"
@@ -29,8 +29,6 @@ import (
 	"github.com/pelletier/go-toml/v2"
 	"github.com/spf13/afero"
 	"github.com/tdewolff/parse/v2"
-
-	"errors"
 )
 
 // FileError represents an error when handling a file: Parsing a config file,
@@ -48,6 +46,9 @@ type FileError interface {
 
 	// UpdateContent updates the error with a new ErrorContext from the content of the file.
 	UpdateContent(r io.Reader, linematcher LineMatcherFn) FileError
+
+	// SetFilename sets the filename of the error.
+	SetFilename(filename string) FileError
 }
 
 // Unwrapper can unwrap errors created with fmt.Errorf.
@@ -60,6 +61,11 @@ var (
 	_ Unwrapper = (*fileError)(nil)
 )
 
+func (fe *fileError) SetFilename(filename string) FileError {
+	fe.position.Filename = filename
+	return fe
+}
+
 func (fe *fileError) UpdatePosition(pos text.Position) FileError {
 	oldFilename := fe.Position().Filename
 	if pos.Filename != "" && fe.fileType == "" {
@@ -115,7 +121,6 @@ func (fe *fileError) UpdateContent(r io.Reader, linematcher LineMatcherFn) FileE
 	}
 
 	return fe
-
 }
 
 type fileError struct {
@@ -181,7 +186,6 @@ func NewFileErrorFromName(err error, name string) FileError {
 	}
 
 	return &fileError{cause: err, fileType: fileType, position: pos}
-
 }
 
 // NewFileErrorFromPos will use the filename and line number from pos to create a new FileError, wrapping err.
@@ -192,7 +196,6 @@ func NewFileErrorFromPos(err error, pos text.Position) FileError {
 		_, fileType = paths.FileAndExtNoDelimiter(filepath.Clean(pos.Filename))
 	}
 	return &fileError{cause: err, fileType: fileType, position: pos}
-
 }
 
 func NewFileErrorFromFileInErr(err error, fs afero.Fs, linematcher LineMatcherFn) FileError {
@@ -249,7 +252,6 @@ func openFile(filename string, fs afero.Fs) (afero.File, string, error) {
 		}); ok {
 			realFilename = s.Filename()
 		}
-
 	}
 
 	f, err2 := fs.Open(filename)

common/herrors/file_error_test.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -14,12 +14,11 @@
 package herrors
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 	"testing"
 
-	"errors"
-
 	"github.com/gohugoio/hugo/common/text"
 
 	qt "github.com/frankban/quicktest"
@@ -48,7 +47,6 @@ func TestNewFileError(t *testing.T) {
 	c.Assert(errorContext.Lines, qt.DeepEquals, []string{"line 30", "line 31", "line 32", "line 33", "line 34"})
 	c.Assert(errorContext.LinesPos, qt.Equals, 2)
 	c.Assert(errorContext.ChromaLexer, qt.Equals, "go-html-template")
-
 }
 
 func TestNewFileErrorExtractFromMessage(t *testing.T) {

common/hreflect/helpers.go

@@ -1,4 +1,4 @@
-// Copyright 2019 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 // Some functions in this file (see comments) is based on the Go source code,
 // copyright The Go Authors and  governed by a BSD-style license.
 //
@@ -23,6 +23,7 @@ import (
 	"time"
 
 	"github.com/gohugoio/hugo/common/htime"
+	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/common/types"
 )
 
@@ -188,6 +189,20 @@ func IsTime(tp reflect.Type) bool {
 	return false
 }
 
+// IsValid returns whether v is not nil and a valid value.
+func IsValid(v reflect.Value) bool {
+	if !v.IsValid() {
+		return false
+	}
+
+	switch v.Kind() {
+	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
+		return !v.IsNil()
+	}
+
+	return true
+}
+
 // AsTime returns v as a time.Time if possible.
 // The given location is only used if the value implements AsTimeProvider (e.g. go-toml local).
 // A zero Time and false is returned if this isn't possible.
@@ -217,7 +232,7 @@ func CallMethodByName(cxt context.Context, name string, v reflect.Value) []refle
 			panic("not supported")
 		}
 		first := tp.In(0)
-		if first.Implements(ContextInterface) {
+		if IsContextType(first) {
 			args = append(args, reflect.ValueOf(cxt))
 		}
 	}
@@ -236,4 +251,24 @@ func indirectInterface(v reflect.Value) reflect.Value {
 	return v.Elem()
 }
 
-var ContextInterface = reflect.TypeOf((*context.Context)(nil)).Elem()
+var contextInterface = reflect.TypeOf((*context.Context)(nil)).Elem()
+
+var isContextCache = maps.NewCache[reflect.Type, bool]()
+
+type k string
+
+var contextTypeValue = reflect.TypeOf(context.WithValue(context.Background(), k("key"), 32))
+
+// IsContextType returns whether tp is a context.Context type.
+func IsContextType(tp reflect.Type) bool {
+	if tp == contextTypeValue {
+		return true
+	}
+	if tp == contextInterface {
+		return true
+	}
+
+	return isContextCache.GetOrCreate(tp, func() bool {
+		return tp.Implements(contextInterface)
+	})
+}

common/hreflect/helpers_test.go

@@ -14,6 +14,7 @@
 package hreflect
 
 import (
+	"context"
 	"reflect"
 	"testing"
 	"time"
@@ -40,6 +41,42 @@ func TestGetMethodByName(t *testing.T) {
 	c.Assert(GetMethodIndexByName(tp, "Foo"), qt.Equals, -1)
 }
 
+func TestIsContextType(t *testing.T) {
+	c := qt.New(t)
+	type k string
+	ctx := context.Background()
+	valueCtx := context.WithValue(ctx, k("key"), 32)
+	c.Assert(IsContextType(reflect.TypeOf(ctx)), qt.IsTrue)
+	c.Assert(IsContextType(reflect.TypeOf(valueCtx)), qt.IsTrue)
+}
+
+func BenchmarkIsContextType(b *testing.B) {
+	type k string
+	b.Run("value", func(b *testing.B) {
+		ctx := context.Background()
+		ctxs := make([]reflect.Type, b.N)
+		for i := 0; i < b.N; i++ {
+			ctxs[i] = reflect.TypeOf(context.WithValue(ctx, k("key"), i))
+		}
+
+		b.ResetTimer()
+		for i := 0; i < b.N; i++ {
+			if !IsContextType(ctxs[i]) {
+				b.Fatal("not context")
+			}
+		}
+	})
+
+	b.Run("background", func(b *testing.B) {
+		var ctxt reflect.Type = reflect.TypeOf(context.Background())
+		for i := 0; i < b.N; i++ {
+			if !IsContextType(ctxt) {
+				b.Fatal("not context")
+			}
+		}
+	})
+}
+
 func BenchmarkIsTruthFul(b *testing.B) {
 	v := reflect.ValueOf("Hugo")
 

common/hstrings/strings.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -122,3 +122,8 @@ func InSlicEqualFold(arr []string, el string) bool {
 	}
 	return false
 }
+
+type Tuple struct {
+	First  string
+	Second string
+}

common/hstrings/strings_test.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -33,7 +33,6 @@ func TestStringEqualFold(t *testing.T) {
 	c.Assert(StringEqualFold(s1).EqualFold("b"), qt.Equals, false)
 	c.Assert(StringEqualFold(s1).Eq(s2), qt.Equals, true)
 	c.Assert(StringEqualFold(s1).Eq("b"), qt.Equals, false)
-
 }
 
 func TestGetOrCompileRegexp(t *testing.T) {
@@ -42,7 +41,6 @@ func TestGetOrCompileRegexp(t *testing.T) {
 	re, err := GetOrCompileRegexp(`\d+`)
 	c.Assert(err, qt.IsNil)
 	c.Assert(re.MatchString("123"), qt.Equals, true)
-
 }
 
 func BenchmarkGetOrCompileRegexp(b *testing.B) {

common/htime/integration_test.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

common/hugio/copy.go

@@ -16,6 +16,7 @@ package hugio
 import (
 	"fmt"
 	"io"
+	iofs "io/fs"
 	"path/filepath"
 
 	"github.com/spf13/afero"
@@ -60,12 +61,16 @@ func CopyDir(fs afero.Fs, from, to string, shouldCopy func(filename string) bool
 		return fmt.Errorf("%q is not a directory", from)
 	}
 
-	err = fs.MkdirAll(to, 0777) // before umask
+	err = fs.MkdirAll(to, 0o777) // before umask
 	if err != nil {
 		return err
 	}
 
-	entries, _ := afero.ReadDir(fs, from)
+	d, err := fs.Open(from)
+	if err != nil {
+		return err
+	}
+	entries, _ := d.(iofs.ReadDirFile).ReadDir(-1)
 	for _, entry := range entries {
 		fromFilename := filepath.Join(from, entry.Name())
 		toFilename := filepath.Join(to, entry.Name())

common/hugio/hasBytesWriter.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

common/hugio/hasBytesWriter_test.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

common/hugio/readers.go

@@ -14,6 +14,7 @@
 package hugio
 
 import (
+	"bytes"
 	"io"
 	"strings"
 )
@@ -57,3 +58,22 @@ func NewReadSeekerNoOpCloser(r ReadSeeker) ReadSeekerNoOpCloser {
 func NewReadSeekerNoOpCloserFromString(content string) ReadSeekerNoOpCloser {
 	return ReadSeekerNoOpCloser{strings.NewReader(content)}
 }
+
+// NewReadSeekerNoOpCloserFromString uses strings.NewReader to create a new ReadSeekerNoOpCloser
+// from the given bytes slice.
+func NewReadSeekerNoOpCloserFromBytes(content []byte) ReadSeekerNoOpCloser {
+	return ReadSeekerNoOpCloser{bytes.NewReader(content)}
+}
+
+// NewReadSeekCloser creates a new ReadSeekCloser from the given ReadSeeker.
+// The ReadSeeker will be seeked to the beginning before returned.
+func NewOpenReadSeekCloser(r ReadSeekCloser) OpenReadSeekCloser {
+	return func() (ReadSeekCloser, error) {
+		r.Seek(0, io.SeekStart)
+		return r, nil
+	}
+}
+
+// OpenReadSeekCloser allows setting some other way (than reading from a filesystem)
+// to open or create a ReadSeekCloser.
+type OpenReadSeekCloser func() (ReadSeekCloser, error)

common/hugo/hugo.go

@@ -35,6 +35,8 @@ import (
 
 	"github.com/spf13/afero"
 
+	iofs "io/fs"
+
 	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/hugofs"
 )
@@ -159,7 +161,12 @@ func GetExecEnviron(workDir string, cfg config.AllProvider, fs afero.Fs) []strin
 	config.SetEnvVars(&env, "HUGO_PUBLISHDIR", filepath.Join(workDir, cfg.BaseConfig().PublishDir))
 
 	if fs != nil {
-		fis, err := afero.ReadDir(fs, files.FolderJSConfig)
+		var fis []iofs.DirEntry
+		d, err := fs.Open(files.FolderJSConfig)
+		if err == nil {
+			fis, err = d.(iofs.ReadDirFile).ReadDir(-1)
+		}
+
 		if err == nil {
 			for _, fi := range fis {
 				key := fmt.Sprintf("HUGO_FILE_%s", strings.ReplaceAll(strings.ToUpper(fi.Name()), ".", "_"))

common/loggers/handlerdefault.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 // Some functions in this file (see comments) is based on the Go source code,
 // copyright The Go Authors and  governed by a BSD-style license.
 //
@@ -27,10 +27,9 @@ import (
 	"github.com/fatih/color"
 )
 
-var bold = color.New(color.Bold)
-
 // levelColor mapping.
 var levelColor = [...]*color.Color{
+	logg.LevelTrace: color.New(color.FgWhite),
 	logg.LevelDebug: color.New(color.FgWhite),
 	logg.LevelInfo:  color.New(color.FgBlue),
 	logg.LevelWarn:  color.New(color.FgYellow),
@@ -39,6 +38,7 @@ var levelColor = [...]*color.Color{
 
 // levelString mapping.
 var levelString = [...]string{
+	logg.LevelTrace: "TRACE",
 	logg.LevelDebug: "DEBUG",
 	logg.LevelInfo:  "INFO ",
 	logg.LevelWarn:  "WARN ",

common/loggers/handlersmisc.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 // Some functions in this file (see comments) is based on the Go source code,
 // copyright The Go Authors and  governed by a BSD-style license.
 //
@@ -69,7 +69,7 @@ func (h *logLevelCounter) HandleLog(e *logg.Entry) error {
 	return nil
 }
 
-var stopError = fmt.Errorf("stop")
+var errStop = fmt.Errorf("stop")
 
 type logOnceHandler struct {
 	threshold logg.Level
@@ -87,7 +87,7 @@ func (h *logOnceHandler) HandleLog(e *logg.Entry) error {
 	defer h.mu.Unlock()
 	hash := identity.HashUint64(e.Level, e.Message, e.Fields)
 	if h.seen[hash] {
-		return stopError
+		return errStop
 	}
 	h.seen[hash] = true
 	return nil
@@ -107,7 +107,7 @@ type stopHandler struct {
 func (h *stopHandler) HandleLog(e *logg.Entry) error {
 	for _, handler := range h.handlers {
 		if err := handler.HandleLog(e); err != nil {
-			if err == stopError {
+			if err == errStop {
 				return nil
 			}
 			return err
@@ -124,26 +124,13 @@ func (h *suppressStatementsHandler) HandleLog(e *logg.Entry) error {
 	for _, field := range e.Fields {
 		if field.Name == FieldNameStatementID {
 			if h.statements[field.Value.(string)] {
-				return stopError
+				return errStop
 			}
 		}
 	}
 	return nil
 }
 
-// replacer creates a new log handler that does string replacement in log messages.
-func replacer(repl *strings.Replacer) logg.Handler {
-	return logg.HandlerFunc(func(e *logg.Entry) error {
-		e.Message = repl.Replace(e.Message)
-		for i, field := range e.Fields {
-			if s, ok := field.Value.(string); ok {
-				e.Fields[i].Value = repl.Replace(s)
-			}
-		}
-		return nil
-	})
-}
-
 // whiteSpaceTrimmer creates a new log handler that trims whitespace from log messages and string fields.
 func whiteSpaceTrimmer() logg.Handler {
 	return logg.HandlerFunc(func(e *logg.Entry) error {

common/loggers/handlerterminal.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 // Some functions in this file (see comments) is based on the Go source code,
 // copyright The Go Authors and  governed by a BSD-style license.
 //
@@ -81,7 +81,7 @@ func (h *noColoursHandler) HandleLog(e *logg.Entry) error {
 		if strings.HasPrefix(field.Name, reservedFieldNamePrefix) {
 			continue
 		}
-		fmt.Fprintf(w, " %s %q", field.Name, field.Value)
+		fmt.Fprintf(w, " %s %v", field.Name, field.Value)
 
 	}
 	fmt.Fprintln(w)

common/loggers/logger.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 // Some functions in this file (see comments) is based on the Go source code,
 // copyright The Go Authors and  governed by a BSD-style license.
 //
@@ -68,11 +68,24 @@ func New(opts Options) Logger {
 	errorsw := &strings.Builder{}
 	logCounters := newLogLevelCounter()
 	handlers := []logg.Handler{
-		whiteSpaceTrimmer(),
-		logHandler,
 		logCounters,
 	}
 
+	if opts.Level == logg.LevelTrace {
+		// Trace is used during development only, and it's useful to
+		// only see the trace messages.
+		handlers = append(handlers,
+			logg.HandlerFunc(func(e *logg.Entry) error {
+				if e.Level != logg.LevelTrace {
+					return logg.ErrStopLogEntry
+				}
+				return nil
+			}),
+		)
+	}
+
+	handlers = append(handlers, whiteSpaceTrimmer(), logHandler)
+
 	if opts.HandlerPost != nil {
 		var hookHandler logg.HandlerFunc = func(e *logg.Entry) error {
 			opts.HandlerPost(e)
@@ -127,6 +140,7 @@ func New(opts Options) Logger {
 		out:         opts.Stdout,
 		level:       opts.Level,
 		logger:      logger,
+		tracel:      l.WithLevel(logg.LevelTrace),
 		debugl:      l.WithLevel(logg.LevelDebug),
 		infol:       l.WithLevel(logg.LevelInfo),
 		warnl:       l.WithLevel(logg.LevelWarn),
@@ -145,11 +159,22 @@ func NewDefault() Logger {
 	return New(opts)
 }
 
+func NewTrace() Logger {
+	opts := Options{
+		DistinctLevel: logg.LevelWarn,
+		Level:         logg.LevelTrace,
+		Stdout:        os.Stdout,
+		Stderr:        os.Stdout,
+	}
+	return New(opts)
+}
+
 func LevelLoggerToWriter(l logg.LevelLogger) io.Writer {
 	return logWriter{l: l}
 }
 
 type Logger interface {
+	Debug() logg.LevelLogger
 	Debugf(format string, v ...any)
 	Debugln(v ...any)
 	Error() logg.LevelLogger
@@ -174,6 +199,7 @@ type Logger interface {
 	Warnf(format string, v ...any)
 	Warnln(v ...any)
 	Deprecatef(fail bool, format string, v ...any)
+	Trace(s logg.StringFunc)
 }
 
 type logAdapter struct {
@@ -183,12 +209,17 @@ type logAdapter struct {
 	out         io.Writer
 	level       logg.Level
 	logger      logg.Logger
+	tracel      logg.LevelLogger
 	debugl      logg.LevelLogger
 	infol       logg.LevelLogger
 	warnl       logg.LevelLogger
 	errorl      logg.LevelLogger
 }
 
+func (l *logAdapter) Debug() logg.LevelLogger {
+	return l.debugl
+}
+
 func (l *logAdapter) Debugf(format string, v ...any) {
 	l.debugl.Logf(format, v...)
 }
@@ -294,6 +325,10 @@ func (l *logAdapter) Errorsf(id, format string, v ...any) {
 	l.errorl.WithField(FieldNameStatementID, id).Logf(format, v...)
 }
 
+func (l *logAdapter) Trace(s logg.StringFunc) {
+	l.tracel.Log(s)
+}
+
 func (l *logAdapter) sprint(v ...any) string {
 	return strings.TrimRight(fmt.Sprintln(v...), "\n")
 }
@@ -315,3 +350,19 @@ func (w logWriter) Write(p []byte) (n int, err error) {
 	w.l.Log(logg.String(string(p)))
 	return len(p), nil
 }
+
+func TimeTrackf(l logg.LevelLogger, start time.Time, fields logg.Fields, format string, a ...any) {
+	elapsed := time.Since(start)
+	if fields != nil {
+		l = l.WithFields(fields)
+	}
+	l.WithField("duration", elapsed).Logf(format, a...)
+}
+
+func TimeTrackfn(fn func() (logg.LevelLogger, error)) error {
+	start := time.Now()
+	l, err := fn()
+	elapsed := time.Since(start)
+	l.WithField("duration", elapsed).Logf("")
+	return err
+}

common/loggers/logger_test.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 // Some functions in this file (see comments) is based on the Go source code,
 // copyright The Go Authors and  governed by a BSD-style license.
 //

common/loggers/loggerglobal.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 // Some functions in this file (see comments) is based on the Go source code,
 // copyright The Go Authors and  governed by a BSD-style license.
 //

common/maps/cache.go

@@ -0,0 +1,90 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package maps
+
+import "sync"
+
+// Cache is a simple thread safe cache backed by a map.
+type Cache[K comparable, T any] struct {
+	m map[K]T
+	sync.RWMutex
+}
+
+// NewCache creates a new Cache.
+func NewCache[K comparable, T any]() *Cache[K, T] {
+	return &Cache[K, T]{m: make(map[K]T)}
+}
+
+// Delete deletes the given key from the cache.
+func (c *Cache[K, T]) Get(key K) (T, bool) {
+	c.RLock()
+	v, found := c.m[key]
+	c.RUnlock()
+	return v, found
+}
+
+// GetOrCreate gets the value for the given key if it exists, or creates it if not.
+func (c *Cache[K, T]) GetOrCreate(key K, create func() T) T {
+	c.RLock()
+	v, found := c.m[key]
+	c.RUnlock()
+	if found {
+		return v
+	}
+	c.Lock()
+	defer c.Unlock()
+	v, found = c.m[key]
+	if found {
+		return v
+	}
+	v = create()
+	c.m[key] = v
+	return v
+}
+
+// Set sets the given key to the given value.
+func (c *Cache[K, T]) Set(key K, value T) {
+	c.Lock()
+	c.m[key] = value
+	c.Unlock()
+}
+
+// SliceCache is a simple thread safe cache backed by a map.
+type SliceCache[T any] struct {
+	m map[string][]T
+	sync.RWMutex
+}
+
+func NewSliceCache[T any]() *SliceCache[T] {
+	return &SliceCache[T]{m: make(map[string][]T)}
+}
+
+func (c *SliceCache[T]) Get(key string) ([]T, bool) {
+	c.RLock()
+	v, found := c.m[key]
+	c.RUnlock()
+	return v, found
+}
+
+func (c *SliceCache[T]) Append(key string, values ...T) {
+	c.Lock()
+	c.m[key] = append(c.m[key], values...)
+	c.Unlock()
+}
+
+func (c *SliceCache[T]) Reset() {
+	c.Lock()
+	c.m = make(map[string][]T)
+	c.Unlock()
+}

common/maps/maps.go

@@ -29,7 +29,7 @@ func ToStringMapE(in any) (map[string]any, error) {
 	case Params:
 		return vv, nil
 	case map[string]string:
-		var m = map[string]any{}
+		m := map[string]any{}
 		for k, v := range vv {
 			m[k] = v
 		}
@@ -192,21 +192,20 @@ func (KeyRenamer) keyPath(k1, k2 string) string {
 }
 
 func (r KeyRenamer) renamePath(parentKeyPath string, m map[string]any) {
-	for key, val := range m {
+	for k, v := range m {
-		keyPath := r.keyPath(parentKeyPath, key)
+		keyPath := r.keyPath(parentKeyPath, k)
-		switch val.(type) {
+		switch vv := v.(type) {
 		case map[any]any:
-			val = cast.ToStringMap(val)
+			r.renamePath(keyPath, cast.ToStringMap(vv))
-			r.renamePath(keyPath, val.(map[string]any))
 		case map[string]any:
-			r.renamePath(keyPath, val.(map[string]any))
+			r.renamePath(keyPath, vv)
 		}
 
 		newKey := r.getNewKey(keyPath)
 
 		if newKey != "" {
-			delete(m, key)
+			delete(m, k)
-			m[newKey] = val
+			m[newKey] = v
 		}
 	}
 }

common/maps/params.go

@@ -61,7 +61,7 @@ func SetParams(dst, src Params) {
 
 // IsZero returns true if p is considered empty.
 func (p Params) IsZero() bool {
-	if p == nil || len(p) == 0 {
+	if len(p) == 0 {
 		return true
 	}
 
@@ -74,7 +74,6 @@ func (p Params) IsZero() bool {
 	}
 
 	return false
-
 }
 
 // MergeParamsWithStrategy transfers values from src to dst for new keys using the merge strategy given.
@@ -93,7 +92,7 @@ func MergeParams(dst, src Params) {
 func (p Params) merge(ps ParamsMergeStrategy, pp Params) {
 	ns, found := p.GetMergeStrategy()
 
-	var ms = ns
+	ms := ns
 	if !found && ps != "" {
 		ms = ps
 	}
@@ -248,7 +247,7 @@ const (
 // CleanConfigStringMapString removes any processing instructions from m,
 // m will never be modified.
 func CleanConfigStringMapString(m map[string]string) map[string]string {
-	if m == nil || len(m) == 0 {
+	if len(m) == 0 {
 		return m
 	}
 	if _, found := m[MergeStrategyKey]; !found {
@@ -267,7 +266,7 @@ func CleanConfigStringMapString(m map[string]string) map[string]string {
 // CleanConfigStringMap is the same as CleanConfigStringMapString but for
 // map[string]any.
 func CleanConfigStringMap(m map[string]any) map[string]any {
-	if m == nil || len(m) == 0 {
+	if len(m) == 0 {
 		return m
 	}
 	if _, found := m[MergeStrategyKey]; !found {
@@ -291,7 +290,6 @@ func CleanConfigStringMap(m map[string]any) map[string]any {
 
 	}
 	return m2
-
 }
 
 func toMergeStrategy(v any) ParamsMergeStrategy {

common/paths/path.go

@@ -16,14 +16,18 @@ package paths
 import (
 	"errors"
 	"fmt"
+	"net/url"
 	"path"
 	"path/filepath"
-	"regexp"
 	"strings"
+	"unicode"
 )
 
 // FilePathSeparator as defined by os.Separator.
-const FilePathSeparator = string(filepath.Separator)
+const (
+	FilePathSeparator = string(filepath.Separator)
+	slash             = "/"
+)
 
 // filepathPathBridge is a bridge for common functionality in filepath vs path
 type filepathPathBridge interface {
@@ -72,6 +76,30 @@ func AbsPathify(workingDir, inPath string) string {
 	return filepath.Join(workingDir, inPath)
 }
 
+// AddTrailingSlash adds a trailing Unix styled slash (/) if not already
+// there.
+func AddTrailingSlash(path string) string {
+	if !strings.HasSuffix(path, "/") {
+		path += "/"
+	}
+	return path
+}
+
+// AddLeadingSlash adds a leading Unix styled slash (/) if not already
+// there.
+func AddLeadingSlash(path string) string {
+	if !strings.HasPrefix(path, "/") {
+		path = "/" + path
+	}
+	return path
+}
+
+// AddTrailingAndLeadingSlash adds a leading and trailing Unix styled slash (/) if not already
+// there.
+func AddLeadingAndTrailingSlash(path string) string {
+	return AddTrailingSlash(AddLeadingSlash(path))
+}
+
 // MakeTitle converts the path given to a suitable title, trimming whitespace
 // and replacing hyphens with whitespace.
 func MakeTitle(inpath string) string {
@@ -94,43 +122,6 @@ func makePathRelative(inPath string, possibleDirectories ...string) (string, err
 	return inPath, errors.New("can't extract relative path, unknown prefix")
 }
 
-// Should be good enough for Hugo.
-var isFileRe = regexp.MustCompile(`.*\..{1,6}$`)
-
-// GetDottedRelativePath expects a relative path starting after the content directory.
-// It returns a relative path with dots ("..") navigating up the path structure.
-func GetDottedRelativePath(inPath string) string {
-	inPath = path.Clean(filepath.ToSlash(inPath))
-
-	if inPath == "." {
-		return "./"
-	}
-
-	if !isFileRe.MatchString(inPath) && !strings.HasSuffix(inPath, "/") {
-		inPath += "/"
-	}
-
-	if !strings.HasPrefix(inPath, "/") {
-		inPath = "/" + inPath
-	}
-
-	dir, _ := filepath.Split(inPath)
-
-	sectionCount := strings.Count(dir, "/")
-
-	if sectionCount == 0 || dir == "/" {
-		return "./"
-	}
-
-	var dottedPath string
-
-	for i := 1; i < sectionCount; i++ {
-		dottedPath += "../"
-	}
-
-	return dottedPath
-}
-
 // ExtNoDelimiter takes a path and returns the extension, excluding the delimiter, i.e. "md".
 func ExtNoDelimiter(in string) string {
 	return strings.TrimPrefix(Ext(in), ".")
@@ -167,12 +158,6 @@ func Filename(in string) (name string) {
 	return
 }
 
-// PathNoExt takes a path, strips out the extension,
-// and returns the name of the file.
-func PathNoExt(in string) string {
-	return strings.TrimSuffix(in, path.Ext(in))
-}
-
 // FileAndExt returns the filename and any extension of a file path as
 // two separate strings.
 //
@@ -252,16 +237,125 @@ func prettifyPath(in string, b filepathPathBridge) string {
 	return b.Join(b.Dir(in), name, "index"+ext)
 }
 
-type NamedSlice struct {
+// CommonDir returns the common directory of the given paths.
-	Name  string
+func CommonDir(path1, path2 string) string {
-	Slice []string
+	if path1 == "" || path2 == "" {
+		return ""
+	}
+
+	p1 := strings.Split(path1, "/")
+	p2 := strings.Split(path2, "/")
+
+	var common []string
+
+	for i := 0; i < len(p1) && i < len(p2); i++ {
+		if p1[i] == p2[i] {
+			common = append(common, p1[i])
+		} else {
+			break
+		}
+	}
+
+	return strings.Join(common, "/")
 }
 
-func (n NamedSlice) String() string {
+// Sanitize sanitizes string to be used in Hugo's file paths and URLs, allowing only
-	if len(n.Slice) == 0 {
+// a predefined set of special Unicode characters.
-		return n.Name
+//
+// Spaces will be replaced with a single hyphen.
+//
+// This function is the core function used to normalize paths in Hugo.
+//
+// Note that this is the first common step for URL/path sanitation,
+// the final URL/path may end up looking differently  if the user has stricter rules defined (e.g. removePathAccents=true).
+func Sanitize(s string) string {
+	var willChange bool
+	for i, r := range s {
+		willChange = !isAllowedPathCharacter(s, i, r)
+		if willChange {
+			break
+		}
 	}
-	return fmt.Sprintf("%s%s{%s}", n.Name, FilePathSeparator, strings.Join(n.Slice, ","))
+
+	if !willChange {
+		// Prevent allocation when nothing changes.
+		return s
+	}
+
+	target := make([]rune, 0, len(s))
+	var (
+		prependHyphen bool
+		wasHyphen     bool
+	)
+
+	for i, r := range s {
+		isAllowed := isAllowedPathCharacter(s, i, r)
+
+		if isAllowed {
+			// track explicit hyphen in input; no need to add a new hyphen if
+			// we just saw one.
+			wasHyphen = r == '-'
+
+			if prependHyphen {
+				// if currently have a hyphen, don't prepend an extra one
+				if !wasHyphen {
+					target = append(target, '-')
+				}
+				prependHyphen = false
+			}
+			target = append(target, r)
+		} else if len(target) > 0 && !wasHyphen && unicode.IsSpace(r) {
+			prependHyphen = true
+		}
+	}
+
+	return string(target)
+}
+
+func isAllowedPathCharacter(s string, i int, r rune) bool {
+	if r == ' ' {
+		return false
+	}
+	// Check for the most likely first (faster).
+	isAllowed := unicode.IsLetter(r) || unicode.IsDigit(r)
+	isAllowed = isAllowed || r == '.' || r == '/' || r == '\\' || r == '_' || r == '#' || r == '+' || r == '~' || r == '-' || r == '@'
+	isAllowed = isAllowed || unicode.IsMark(r)
+	isAllowed = isAllowed || (r == '%' && i+2 < len(s) && ishex(s[i+1]) && ishex(s[i+2]))
+	return isAllowed
+}
+
+// From https://golang.org/src/net/url/url.go
+func ishex(c byte) bool {
+	switch {
+	case '0' <= c && c <= '9':
+		return true
+	case 'a' <= c && c <= 'f':
+		return true
+	case 'A' <= c && c <= 'F':
+		return true
+	}
+	return false
+}
+
+var slashFunc = func(r rune) bool {
+	return r == '/'
+}
+
+// Dir behaves like path.Dir without the path.Clean step.
+//
+//	The returned path ends in a slash only if it is the root "/".
+func Dir(s string) string {
+	dir, _ := path.Split(s)
+	if len(dir) > 1 && dir[len(dir)-1] == '/' {
+		return dir[:len(dir)-1]
+	}
+	return dir
+}
+
+// FieldsSlash cuts s into fields separated with '/'.
+func FieldsSlash(s string) []string {
+	f := strings.FieldsFunc(s, slashFunc)
+	return f
 }
 
 // DirFile holds the result from path.Split.
@@ -274,3 +368,27 @@ type DirFile struct {
 func (df DirFile) String() string {
 	return fmt.Sprintf("%s|%s", df.Dir, df.File)
 }
+
+// PathEscape escapes unicode letters in pth.
+// Use URLEscape to escape full URLs including scheme, query etc.
+// This is slightly faster for the common case.
+// Note, there is a url.PathEscape function, but that also
+// escapes /.
+func PathEscape(pth string) string {
+	u, err := url.Parse(pth)
+	if err != nil {
+		panic(err)
+	}
+	return u.EscapedPath()
+}
+
+// ToSlashTrimLeading is just a filepath.ToSlash with an added / prefix trimmer.
+func ToSlashTrimLeading(s string) string {
+	return strings.TrimPrefix(filepath.ToSlash(s), "/")
+}
+
+// ToSlashPreserveLeading converts the path given to a forward slash separated path
+// and preserves the leading slash if present trimming any trailing slash.
+func ToSlashPreserveLeading(s string) string {
+	return "/" + strings.Trim(filepath.ToSlash(s), "/")
+}

common/paths/path_test.go

@@ -1,4 +1,4 @@
-// Copyright 2021 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -75,44 +75,6 @@ func TestMakePathRelative(t *testing.T) {
 	}
 }
 
-func TestGetDottedRelativePath(t *testing.T) {
-	// on Windows this will receive both kinds, both country and western ...
-	for _, f := range []func(string) string{filepath.FromSlash, func(s string) string { return s }} {
-		doTestGetDottedRelativePath(f, t)
-	}
-}
-
-func doTestGetDottedRelativePath(urlFixer func(string) string, t *testing.T) {
-	type test struct {
-		input, expected string
-	}
-	data := []test{
-		{"", "./"},
-		{urlFixer("/"), "./"},
-		{urlFixer("post"), "../"},
-		{urlFixer("/post"), "../"},
-		{urlFixer("post/"), "../"},
-		{urlFixer("tags/foo.html"), "../"},
-		{urlFixer("/tags/foo.html"), "../"},
-		{urlFixer("/post/"), "../"},
-		{urlFixer("////post/////"), "../"},
-		{urlFixer("/foo/bar/index.html"), "../../"},
-		{urlFixer("/foo/bar/foo/"), "../../../"},
-		{urlFixer("/foo/bar/foo"), "../../../"},
-		{urlFixer("foo/bar/foo/"), "../../../"},
-		{urlFixer("foo/bar/foo/bar"), "../../../../"},
-		{"404.html", "./"},
-		{"404.xml", "./"},
-		{"/404.html", "./"},
-	}
-	for i, d := range data {
-		output := GetDottedRelativePath(d.input)
-		if d.expected != output {
-			t.Errorf("Test %d failed. Expected %q got %q", i, d.expected, output)
-		}
-	}
-}
-
 func TestMakeTitle(t *testing.T) {
 	type test struct {
 		input, expected string
@@ -226,3 +188,77 @@ func TestFileAndExt(t *testing.T) {
 		}
 	}
 }
+
+func TestSanitize(t *testing.T) {
+	c := qt.New(t)
+	tests := []struct {
+		input    string
+		expected string
+	}{
+		{"  Foo bar  ", "Foo-bar"},
+		{"Foo.Bar/foo_Bar-Foo", "Foo.Bar/foo_Bar-Foo"},
+		{"fOO,bar:foobAR", "fOObarfoobAR"},
+		{"FOo/BaR.html", "FOo/BaR.html"},
+		{"FOo/Ba---R.html", "FOo/Ba---R.html"}, /// See #10104
+		{"FOo/Ba       R.html", "FOo/Ba-R.html"},
+		{"трям/трям", "трям/трям"},
+		{"은행", "은행"},
+		{"Банковский кассир", "Банковский-кассир"},
+		// Issue #1488
+		{"संस्कृत", "संस्कृत"},
+		{"a%C3%B1ame", "a%C3%B1ame"},         // Issue #1292
+		{"this+is+a+test", "this+is+a+test"}, // Issue #1290
+		{"~foo", "~foo"},                     // Issue #2177
+
+	}
+
+	for _, test := range tests {
+		c.Assert(Sanitize(test.input), qt.Equals, test.expected)
+	}
+}
+
+func BenchmarkSanitize(b *testing.B) {
+	const (
+		allAlowedPath = "foo/bar"
+		spacePath     = "foo bar"
+	)
+
+	// This should not allocate any memory.
+	b.Run("All allowed", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			got := Sanitize(allAlowedPath)
+			if got != allAlowedPath {
+				b.Fatal(got)
+			}
+		}
+	})
+
+	// This will allocate some memory.
+	b.Run("Spaces", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			got := Sanitize(spacePath)
+			if got != "foo-bar" {
+				b.Fatal(got)
+			}
+		}
+	})
+}
+
+func TestDir(t *testing.T) {
+	c := qt.New(t)
+	c.Assert(Dir("/a/b/c/d"), qt.Equals, "/a/b/c")
+	c.Assert(Dir("/a"), qt.Equals, "/")
+	c.Assert(Dir("/"), qt.Equals, "/")
+	c.Assert(Dir(""), qt.Equals, "")
+}
+
+func TestFieldsSlash(t *testing.T) {
+	c := qt.New(t)
+
+	c.Assert(FieldsSlash("a/b/c"), qt.DeepEquals, []string{"a", "b", "c"})
+	c.Assert(FieldsSlash("/a/b/c"), qt.DeepEquals, []string{"a", "b", "c"})
+	c.Assert(FieldsSlash("/a/b/c/"), qt.DeepEquals, []string{"a", "b", "c"})
+	c.Assert(FieldsSlash("a/b/c/"), qt.DeepEquals, []string{"a", "b", "c"})
+	c.Assert(FieldsSlash("/"), qt.DeepEquals, []string{})
+	c.Assert(FieldsSlash(""), qt.DeepEquals, []string{})
+}

common/paths/pathparser.go

@@ -0,0 +1,494 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package paths
+
+import (
+	"path"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/gohugoio/hugo/common/types"
+	"github.com/gohugoio/hugo/hugofs/files"
+)
+
+var defaultPathParser PathParser
+
+// PathParser parses a path into a Path.
+type PathParser struct {
+	// Maps the language code to its index in the languages/sites slice.
+	LanguageIndex map[string]int
+}
+
+// Parse parses component c with path s into Path using the default path parser.
+func Parse(c, s string) *Path {
+	return defaultPathParser.Parse(c, s)
+}
+
+// NormalizePathString returns a normalized path string using the very basic Hugo rules.
+func NormalizePathStringBasic(s string) string {
+	// All lower case.
+	s = strings.ToLower(s)
+
+	// Replace spaces with hyphens.
+	s = strings.ReplaceAll(s, " ", "-")
+
+	return s
+}
+
+// Parse parses component c with path s into Path using Hugo's content path rules.
+func (parser PathParser) Parse(c, s string) *Path {
+	p, err := parser.parse(c, s)
+	if err != nil {
+		panic(err)
+	}
+	return p
+}
+
+func (pp *PathParser) parse(component, s string) (*Path, error) {
+	ss := NormalizePathStringBasic(s)
+
+	p, err := pp.doParse(component, ss)
+	if err != nil {
+		return nil, err
+	}
+
+	if s != ss {
+		var err error
+		// Preserve the original case for titles etc.
+		p.unnormalized, err = pp.doParse(component, s)
+
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		p.unnormalized = p
+	}
+
+	return p, nil
+}
+
+func (pp *PathParser) doParse(component, s string) (*Path, error) {
+	p := &Path{
+		component:             component,
+		posContainerLow:       -1,
+		posContainerHigh:      -1,
+		posSectionHigh:        -1,
+		posIdentifierLanguage: -1,
+	}
+
+	hasLang := pp.LanguageIndex != nil
+	hasLang = hasLang && (component == files.ComponentFolderContent || component == files.ComponentFolderLayouts)
+
+	if runtime.GOOS == "windows" {
+		s = path.Clean(filepath.ToSlash(s))
+		if s == "." {
+			s = ""
+		}
+	}
+
+	if s == "" {
+		s = "/"
+	}
+
+	// Leading slash, no trailing slash.
+	if !strings.HasPrefix(s, "/") {
+		s = "/" + s
+	}
+
+	if s != "/" && s[len(s)-1] == '/' {
+		s = s[:len(s)-1]
+	}
+
+	p.s = s
+	slashCount := 0
+
+	for i := len(s) - 1; i >= 0; i-- {
+		c := s[i]
+
+		switch c {
+		case '.':
+			if p.posContainerHigh == -1 {
+				var high int
+				if len(p.identifiers) > 0 {
+					high = p.identifiers[len(p.identifiers)-1].Low - 1
+				} else {
+					high = len(p.s)
+				}
+				id := types.LowHigh{Low: i + 1, High: high}
+				if len(p.identifiers) == 0 {
+					p.identifiers = append(p.identifiers, id)
+				} else if len(p.identifiers) == 1 {
+					// Check for a valid language.
+					s := p.s[id.Low:id.High]
+
+					if hasLang {
+						if _, found := pp.LanguageIndex[s]; found {
+							p.posIdentifierLanguage = 1
+							p.identifiers = append(p.identifiers, id)
+						}
+					}
+				}
+			}
+		case '/':
+			slashCount++
+			if p.posContainerHigh == -1 {
+				p.posContainerHigh = i + 1
+			} else if p.posContainerLow == -1 {
+				p.posContainerLow = i + 1
+			}
+			if i > 0 {
+				p.posSectionHigh = i
+			}
+		}
+	}
+
+	isContentComponent := p.component == files.ComponentFolderContent || p.component == files.ComponentFolderArchetypes
+	isContent := isContentComponent && files.IsContentExt(p.Ext())
+
+	if isContent {
+		id := p.identifiers[len(p.identifiers)-1]
+		b := p.s[p.posContainerHigh : id.Low-1]
+		switch b {
+		case "index":
+			p.bundleType = PathTypeLeaf
+		case "_index":
+			p.bundleType = PathTypeBranch
+		default:
+			p.bundleType = PathTypeContentSingle
+		}
+
+		if slashCount == 2 && p.IsLeafBundle() {
+			p.posSectionHigh = 0
+		}
+	}
+
+	return p, nil
+}
+
+func ModifyPathBundleTypeResource(p *Path) {
+	if p.IsContent() {
+		p.bundleType = PathTypeContentResource
+	} else {
+		p.bundleType = PathTypeFile
+	}
+}
+
+type PathType int
+
+const (
+	// A generic resource, e.g. a JSON file.
+	PathTypeFile PathType = iota
+
+	// All below are content files.
+	// A resource of a content type with front matter.
+	PathTypeContentResource
+
+	// E.g. /blog/my-post.md
+	PathTypeContentSingle
+
+	// All bewlow are bundled content files.
+
+	// Leaf bundles, e.g. /blog/my-post/index.md
+	PathTypeLeaf
+
+	// Branch bundles, e.g. /blog/_index.md
+	PathTypeBranch
+)
+
+type Path struct {
+	s string
+
+	posContainerLow  int
+	posContainerHigh int
+	posSectionHigh   int
+
+	component  string
+	bundleType PathType
+
+	identifiers []types.LowHigh
+
+	posIdentifierLanguage int
+
+	trimLeadingSlash bool
+
+	unnormalized *Path
+}
+
+// TrimLeadingSlash returns a copy of the Path with the leading slash removed.
+func (p Path) TrimLeadingSlash() *Path {
+	p.trimLeadingSlash = true
+	return &p
+}
+
+func (p *Path) norm(s string) string {
+	if p.trimLeadingSlash {
+		s = strings.TrimPrefix(s, "/")
+	}
+	return s
+}
+
+// IdentifierBase satifies identity.Identity.
+func (p *Path) IdentifierBase() string {
+	return p.Base()[1:]
+}
+
+// Component returns the component for this path (e.g. "content").
+func (p *Path) Component() string {
+	return p.component
+}
+
+// Container returns the base name of the container directory for this path.
+func (p *Path) Container() string {
+	if p.posContainerLow == -1 {
+		return ""
+	}
+	return p.norm(p.s[p.posContainerLow : p.posContainerHigh-1])
+}
+
+// ContainerDir returns the container directory for this path.
+// For content bundles this will be the parent directory.
+func (p *Path) ContainerDir() string {
+	if p.posContainerLow == -1 || !p.IsBundle() {
+		return p.Dir()
+	}
+	return p.norm(p.s[:p.posContainerLow-1])
+}
+
+// Section returns the first path element (section).
+func (p *Path) Section() string {
+	if p.posSectionHigh <= 0 {
+		return ""
+	}
+	return p.norm(p.s[1:p.posSectionHigh])
+}
+
+// IsContent returns true if the path is a content file (e.g. mypost.md).
+// Note that this will also return true for content files in a bundle.
+func (p *Path) IsContent() bool {
+	return p.BundleType() >= PathTypeContentResource
+}
+
+// isContentPage returns true if the path is a content file (e.g. mypost.md),
+// but nof if inside a leaf bundle.
+func (p *Path) isContentPage() bool {
+	return p.BundleType() >= PathTypeContentSingle
+}
+
+// Name returns the last element of path.
+func (p *Path) Name() string {
+	if p.posContainerHigh > 0 {
+		return p.s[p.posContainerHigh:]
+	}
+	return p.s
+}
+
+// Name returns the last element of path withhout any extension.
+func (p *Path) NameNoExt() string {
+	if i := p.identifierIndex(0); i != -1 {
+		return p.s[p.posContainerHigh : p.identifiers[i].Low-1]
+	}
+	return p.s[p.posContainerHigh:]
+}
+
+// Name returns the last element of path withhout any language identifier.
+func (p *Path) NameNoLang() string {
+	i := p.identifierIndex(p.posIdentifierLanguage)
+	if i == -1 {
+		return p.Name()
+	}
+
+	return p.s[p.posContainerHigh:p.identifiers[i].Low-1] + p.s[p.identifiers[i].High:]
+}
+
+// BaseNameNoIdentifier returns the logcical base name for a resource without any idenifier (e.g. no extension).
+// For bundles this will be the containing directory's name, e.g. "blog".
+func (p *Path) BaseNameNoIdentifier() string {
+	if p.IsBundle() {
+		return p.Container()
+	}
+	return p.NameNoIdentifier()
+}
+
+// NameNoIdentifier returns the last element of path withhout any identifier (e.g. no extension).
+func (p *Path) NameNoIdentifier() string {
+	if len(p.identifiers) > 0 {
+		return p.s[p.posContainerHigh : p.identifiers[len(p.identifiers)-1].Low-1]
+	}
+	return p.s[p.posContainerHigh:]
+}
+
+// Dir returns all but the last element of path, typically the path's directory.
+func (p *Path) Dir() (d string) {
+	if p.posContainerHigh > 0 {
+		d = p.s[:p.posContainerHigh-1]
+	}
+	if d == "" {
+		d = "/"
+	}
+	d = p.norm(d)
+	return
+}
+
+// Path returns the full path.
+func (p *Path) Path() (d string) {
+	return p.norm(p.s)
+}
+
+// Unmormalized returns the Path with the original case preserved.
+func (p *Path) Unmormalized() *Path {
+	return p.unnormalized
+}
+
+// PathNoLang returns the Path but with any language identifier removed.
+func (p *Path) PathNoLang() string {
+	return p.base(true, false)
+}
+
+// PathNoIdentifier returns the Path but with any identifier (ext, lang) removed.
+func (p *Path) PathNoIdentifier() string {
+	return p.base(false, false)
+}
+
+// PathRel returns the path relativeto the given owner.
+func (p *Path) PathRel(owner *Path) string {
+	ob := owner.Base()
+	if !strings.HasSuffix(ob, "/") {
+		ob += "/"
+	}
+	return strings.TrimPrefix(p.Path(), ob)
+}
+
+// BaseRel returns the base path relative to the given owner.
+func (p *Path) BaseRel(owner *Path) string {
+	ob := owner.Base()
+	if ob == "/" {
+		ob = ""
+	}
+	return p.Base()[len(ob)+1:]
+}
+
+// For content files, Base returns the path without any identifiers (extension, language code etc.).
+// Any 'index' as the last path element is ignored.
+//
+// For other files (Resources), any extension is kept.
+func (p *Path) Base() string {
+	return p.base(!p.isContentPage(), p.IsBundle())
+}
+
+// BaseNoLeadingSlash returns the base path without the leading slash.
+func (p *Path) BaseNoLeadingSlash() string {
+	return p.Base()[1:]
+}
+
+func (p *Path) base(preserveExt, isBundle bool) string {
+	if len(p.identifiers) == 0 {
+		return p.norm(p.s)
+	}
+
+	if preserveExt && len(p.identifiers) == 1 {
+		// Preserve extension.
+		return p.norm(p.s)
+	}
+
+	id := p.identifiers[len(p.identifiers)-1]
+	high := id.Low - 1
+
+	if isBundle {
+		high = p.posContainerHigh - 1
+	}
+
+	if high == 0 {
+		high++
+	}
+
+	if !preserveExt {
+		return p.norm(p.s[:high])
+	}
+
+	// For txt files etc. we want to preserve the extension.
+	id = p.identifiers[0]
+
+	return p.norm(p.s[:high] + p.s[id.Low-1:id.High])
+}
+
+func (p *Path) Ext() string {
+	return p.identifierAsString(0)
+}
+
+func (p *Path) Lang() string {
+	return p.identifierAsString(1)
+}
+
+func (p *Path) Identifier(i int) string {
+	return p.identifierAsString(i)
+}
+
+func (p *Path) Identifiers() []string {
+	ids := make([]string, len(p.identifiers))
+	for i, id := range p.identifiers {
+		ids[i] = p.s[id.Low:id.High]
+	}
+	return ids
+}
+
+func (p *Path) IsHTML() bool {
+	return files.IsHTML(p.Ext())
+}
+
+func (p *Path) BundleType() PathType {
+	return p.bundleType
+}
+
+func (p *Path) IsBundle() bool {
+	return p.bundleType >= PathTypeLeaf
+}
+
+func (p *Path) IsBranchBundle() bool {
+	return p.bundleType == PathTypeBranch
+}
+
+func (p *Path) IsLeafBundle() bool {
+	return p.bundleType == PathTypeLeaf
+}
+
+func (p *Path) identifierAsString(i int) string {
+	i = p.identifierIndex(i)
+	if i == -1 {
+		return ""
+	}
+
+	id := p.identifiers[i]
+	return p.s[id.Low:id.High]
+}
+
+func (p *Path) identifierIndex(i int) int {
+	if i < 0 || i >= len(p.identifiers) {
+		return -1
+	}
+	return i
+}
+
+// HasExt returns true if the Unix styled path has an extension.
+func HasExt(p string) bool {
+	for i := len(p) - 1; i >= 0; i-- {
+		if p[i] == '.' {
+			return true
+		}
+		if p[i] == '/' {
+			return false
+		}
+	}
+	return false
+}

common/paths/pathparser_test.go

@@ -0,0 +1,351 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package paths
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/gohugoio/hugo/hugofs/files"
+
+	qt "github.com/frankban/quicktest"
+)
+
+var testParser = &PathParser{
+	LanguageIndex: map[string]int{
+		"no": 0,
+		"en": 1,
+	},
+}
+
+func TestParse(t *testing.T) {
+	c := qt.New(t)
+
+	tests := []struct {
+		name   string
+		path   string
+		assert func(c *qt.C, p *Path)
+	}{
+		{
+			"Basic text file",
+			"/a/b.txt",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Name(), qt.Equals, "b.txt")
+				c.Assert(p.Base(), qt.Equals, "/a/b.txt")
+				c.Assert(p.Container(), qt.Equals, "a")
+				c.Assert(p.Dir(), qt.Equals, "/a")
+				c.Assert(p.Ext(), qt.Equals, "txt")
+				c.Assert(p.IsContent(), qt.IsFalse)
+			},
+		},
+		{
+			"Basic text file, upper case",
+			"/A/B.txt",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Name(), qt.Equals, "b.txt")
+				c.Assert(p.NameNoExt(), qt.Equals, "b")
+				c.Assert(p.NameNoIdentifier(), qt.Equals, "b")
+				c.Assert(p.BaseNameNoIdentifier(), qt.Equals, "b")
+				c.Assert(p.Base(), qt.Equals, "/a/b.txt")
+				c.Assert(p.Ext(), qt.Equals, "txt")
+			},
+		},
+		{
+			"Basic text file, 1 space in dir",
+			"/a b/c.txt",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/a-b/c.txt")
+			},
+		},
+		{
+			"Basic text file, 2 spaces in dir",
+			"/a  b/c.txt",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/a--b/c.txt")
+			},
+		},
+		{
+			"Basic text file, 1 space in filename",
+			"/a/b c.txt",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/a/b-c.txt")
+			},
+		},
+		{
+			"Basic text file, 2 spaces in filename",
+			"/a/b  c.txt",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/a/b--c.txt")
+			},
+		},
+		{
+			"Basic text file, mixed case and spaces, unnormalized",
+			"/a/Foo BAR.txt",
+			func(c *qt.C, p *Path) {
+				pp := p.Unmormalized()
+				c.Assert(pp, qt.IsNotNil)
+				c.Assert(pp.BaseNameNoIdentifier(), qt.Equals, "Foo BAR")
+			},
+		},
+		{
+			"Basic Markdown file",
+			"/a/b/c.md",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.IsContent(), qt.IsTrue)
+				c.Assert(p.IsLeafBundle(), qt.IsFalse)
+				c.Assert(p.Name(), qt.Equals, "c.md")
+				c.Assert(p.Base(), qt.Equals, "/a/b/c")
+				c.Assert(p.Section(), qt.Equals, "a")
+				c.Assert(p.BaseNameNoIdentifier(), qt.Equals, "c")
+				c.Assert(p.Path(), qt.Equals, "/a/b/c.md")
+				c.Assert(p.Dir(), qt.Equals, "/a/b")
+				c.Assert(p.Container(), qt.Equals, "b")
+				c.Assert(p.ContainerDir(), qt.Equals, "/a/b")
+				c.Assert(p.Ext(), qt.Equals, "md")
+			},
+		},
+		{
+			"Content resource",
+			"/a/b.md",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Name(), qt.Equals, "b.md")
+				c.Assert(p.Base(), qt.Equals, "/a/b")
+				c.Assert(p.BaseNoLeadingSlash(), qt.Equals, "a/b")
+				c.Assert(p.Section(), qt.Equals, "a")
+				c.Assert(p.BaseNameNoIdentifier(), qt.Equals, "b")
+
+				// Reclassify it as a content resource.
+				ModifyPathBundleTypeResource(p)
+				c.Assert(p.BundleType(), qt.Equals, PathTypeContentResource)
+				c.Assert(p.IsContent(), qt.IsTrue)
+				c.Assert(p.Name(), qt.Equals, "b.md")
+				c.Assert(p.Base(), qt.Equals, "/a/b.md")
+			},
+		},
+		{
+			"No ext",
+			"/a/b",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Name(), qt.Equals, "b")
+				c.Assert(p.NameNoExt(), qt.Equals, "b")
+				c.Assert(p.Base(), qt.Equals, "/a/b")
+				c.Assert(p.Ext(), qt.Equals, "")
+			},
+		},
+		{
+			"No ext, trailing slash",
+			"/a/b/",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Name(), qt.Equals, "b")
+				c.Assert(p.Base(), qt.Equals, "/a/b")
+				c.Assert(p.Ext(), qt.Equals, "")
+			},
+		},
+		{
+			"Identifiers",
+			"/a/b.a.b.no.txt",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Name(), qt.Equals, "b.a.b.no.txt")
+				c.Assert(p.NameNoIdentifier(), qt.Equals, "b.a.b")
+				c.Assert(p.NameNoLang(), qt.Equals, "b.a.b.txt")
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"txt", "no"})
+				c.Assert(p.Base(), qt.Equals, "/a/b.a.b.txt")
+				c.Assert(p.BaseNoLeadingSlash(), qt.Equals, "a/b.a.b.txt")
+				c.Assert(p.PathNoLang(), qt.Equals, "/a/b.a.b.txt")
+				c.Assert(p.Ext(), qt.Equals, "txt")
+				c.Assert(p.PathNoIdentifier(), qt.Equals, "/a/b.a.b")
+			},
+		},
+		{
+			"Home branch cundle",
+			"/_index.md",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/")
+				c.Assert(p.Path(), qt.Equals, "/_index.md")
+				c.Assert(p.Container(), qt.Equals, "")
+				c.Assert(p.ContainerDir(), qt.Equals, "/")
+			},
+		},
+		{
+			"Index content file in root",
+			"/a/index.md",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/a")
+				c.Assert(p.BaseNameNoIdentifier(), qt.Equals, "a")
+				c.Assert(p.Container(), qt.Equals, "a")
+				c.Assert(p.Container(), qt.Equals, "a")
+				c.Assert(p.ContainerDir(), qt.Equals, "")
+				c.Assert(p.Dir(), qt.Equals, "/a")
+				c.Assert(p.Ext(), qt.Equals, "md")
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"md"})
+				c.Assert(p.IsBranchBundle(), qt.IsFalse)
+				c.Assert(p.IsBundle(), qt.IsTrue)
+				c.Assert(p.IsLeafBundle(), qt.IsTrue)
+				c.Assert(p.Lang(), qt.Equals, "")
+				c.Assert(p.NameNoExt(), qt.Equals, "index")
+				c.Assert(p.NameNoIdentifier(), qt.Equals, "index")
+				c.Assert(p.NameNoLang(), qt.Equals, "index.md")
+				c.Assert(p.Section(), qt.Equals, "")
+			},
+		},
+		{
+			"Index content file with lang",
+			"/a/b/index.no.md",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/a/b")
+				c.Assert(p.BaseNameNoIdentifier(), qt.Equals, "b")
+				c.Assert(p.Container(), qt.Equals, "b")
+				c.Assert(p.ContainerDir(), qt.Equals, "/a")
+				c.Assert(p.Dir(), qt.Equals, "/a/b")
+				c.Assert(p.Ext(), qt.Equals, "md")
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"md", "no"})
+				c.Assert(p.IsBranchBundle(), qt.IsFalse)
+				c.Assert(p.IsBundle(), qt.IsTrue)
+				c.Assert(p.IsLeafBundle(), qt.IsTrue)
+				c.Assert(p.Lang(), qt.Equals, "no")
+				c.Assert(p.NameNoExt(), qt.Equals, "index.no")
+				c.Assert(p.NameNoIdentifier(), qt.Equals, "index")
+				c.Assert(p.NameNoLang(), qt.Equals, "index.md")
+				c.Assert(p.PathNoLang(), qt.Equals, "/a/b/index.md")
+				c.Assert(p.Section(), qt.Equals, "a")
+			},
+		},
+		{
+			"Index branch content file",
+			"/a/b/_index.no.md",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/a/b")
+				c.Assert(p.BaseNameNoIdentifier(), qt.Equals, "b")
+				c.Assert(p.Container(), qt.Equals, "b")
+				c.Assert(p.ContainerDir(), qt.Equals, "/a")
+				c.Assert(p.Ext(), qt.Equals, "md")
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"md", "no"})
+				c.Assert(p.IsBranchBundle(), qt.IsTrue)
+				c.Assert(p.IsBundle(), qt.IsTrue)
+				c.Assert(p.IsLeafBundle(), qt.IsFalse)
+				c.Assert(p.NameNoExt(), qt.Equals, "_index.no")
+				c.Assert(p.NameNoLang(), qt.Equals, "_index.md")
+			},
+		},
+		{
+			"Index root no slash",
+			"_index.md",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/")
+				c.Assert(p.Ext(), qt.Equals, "md")
+				c.Assert(p.Name(), qt.Equals, "_index.md")
+			},
+		},
+		{
+			"Index root",
+			"/_index.md",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/")
+				c.Assert(p.Ext(), qt.Equals, "md")
+				c.Assert(p.Name(), qt.Equals, "_index.md")
+			},
+		},
+		{
+			"Index first",
+			"/a/_index.md",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Section(), qt.Equals, "a")
+			},
+		},
+		{
+			"Index text file",
+			"/a/b/index.no.txt",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/a/b/index.txt")
+				c.Assert(p.Ext(), qt.Equals, "txt")
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"txt", "no"})
+				c.Assert(p.IsLeafBundle(), qt.IsFalse)
+				c.Assert(p.PathNoIdentifier(), qt.Equals, "/a/b/index")
+			},
+		},
+		{
+			"Empty",
+			"",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/")
+				c.Assert(p.Ext(), qt.Equals, "")
+				c.Assert(p.Name(), qt.Equals, "")
+				c.Assert(p.Path(), qt.Equals, "/")
+			},
+		},
+		{
+			"Slash",
+			"/",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/")
+				c.Assert(p.Ext(), qt.Equals, "")
+				c.Assert(p.Name(), qt.Equals, "")
+			},
+		},
+		{
+			"Trim Leading Slash bundle",
+			"foo/bar/index.no.md",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Path(), qt.Equals, "/foo/bar/index.no.md")
+				pp := p.TrimLeadingSlash()
+				c.Assert(pp.Path(), qt.Equals, "foo/bar/index.no.md")
+				c.Assert(pp.PathNoLang(), qt.Equals, "foo/bar/index.md")
+				c.Assert(pp.Base(), qt.Equals, "foo/bar")
+				c.Assert(pp.Dir(), qt.Equals, "foo/bar")
+				c.Assert(pp.ContainerDir(), qt.Equals, "foo")
+				c.Assert(pp.Container(), qt.Equals, "bar")
+				c.Assert(pp.BaseNameNoIdentifier(), qt.Equals, "bar")
+			},
+		},
+		{
+			"Trim Leading Slash file",
+			"foo/bar.txt",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Path(), qt.Equals, "/foo/bar.txt")
+				pp := p.TrimLeadingSlash()
+				c.Assert(pp.Path(), qt.Equals, "foo/bar.txt")
+				c.Assert(pp.PathNoLang(), qt.Equals, "foo/bar.txt")
+				c.Assert(pp.Base(), qt.Equals, "foo/bar.txt")
+				c.Assert(pp.Dir(), qt.Equals, "foo")
+				c.Assert(pp.ContainerDir(), qt.Equals, "foo")
+				c.Assert(pp.Container(), qt.Equals, "foo")
+				c.Assert(pp.BaseNameNoIdentifier(), qt.Equals, "bar")
+			},
+		},
+		{
+			"File separator",
+			filepath.FromSlash("/a/b/c.txt"),
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/a/b/c.txt")
+				c.Assert(p.Ext(), qt.Equals, "txt")
+				c.Assert(p.Name(), qt.Equals, "c.txt")
+				c.Assert(p.Path(), qt.Equals, "/a/b/c.txt")
+			},
+		},
+	}
+	for _, test := range tests {
+		c.Run(test.name, func(c *qt.C) {
+			test.assert(c, testParser.Parse(files.ComponentFolderContent, test.path))
+		})
+	}
+}
+
+func TestHasExt(t *testing.T) {
+	c := qt.New(t)
+
+	c.Assert(HasExt("/a/b/c.txt"), qt.IsTrue)
+	c.Assert(HasExt("/a/b.c/d.txt"), qt.IsTrue)
+	c.Assert(HasExt("/a/b/c"), qt.IsFalse)
+	c.Assert(HasExt("/a/b.c/d"), qt.IsFalse)
+}

common/paths/paths_integration_test.go

@@ -0,0 +1,80 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package paths_test
+
+import (
+	"testing"
+
+	"github.com/gohugoio/hugo/hugolib"
+)
+
+func TestRemovePathAccents(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+disableKinds = ["taxonomy", "term"]
+defaultContentLanguage = "en"
+defaultContentLanguageInSubdir = true
+[languages]
+[languages.en]
+weight = 1
+[languages.fr]
+weight = 2
+removePathAccents = true
+-- content/διακριτικός.md --
+-- content/διακριτικός.fr.md --
+-- layouts/_default/single.html --
+{{ .Language.Lang }}|Single.
+-- layouts/_default/list.html --
+List
+`
+	b := hugolib.Test(t, files)
+
+	b.AssertFileContent("public/en/διακριτικός/index.html", "en|Single")
+	b.AssertFileContent("public/fr/διακριτικος/index.html", "fr|Single")
+}
+
+func TestDisablePathToLower(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+disableKinds = ["taxonomy", "term"]
+defaultContentLanguage = "en"
+defaultContentLanguageInSubdir = true
+[languages]
+[languages.en]
+weight = 1
+[languages.fr]
+weight = 2
+disablePathToLower = true
+-- content/MySection/MyPage.md --
+-- content/MySection/MyPage.fr.md --
+-- content/MySection/MyBundle/index.md --
+-- content/MySection/MyBundle/index.fr.md --
+-- layouts/_default/single.html --
+{{ .Language.Lang }}|Single.
+-- layouts/_default/list.html --
+{{ .Language.Lang }}|List.
+`
+	b := hugolib.Test(t, files)
+
+	b.AssertFileContent("public/en/mysection/index.html", "en|List")
+	b.AssertFileContent("public/en/mysection/mypage/index.html", "en|Single")
+	b.AssertFileContent("public/fr/MySection/index.html", "fr|List")
+	b.AssertFileContent("public/fr/MySection/MyPage/index.html", "fr|Single")
+	b.AssertFileContent("public/en/mysection/mybundle/index.html", "en|Single")
+	b.AssertFileContent("public/fr/MySection/MyBundle/index.html", "fr|Single")
+}

common/paths/pathtype_string.go

@@ -0,0 +1,27 @@
+// Code generated by "stringer -type=PathType"; DO NOT EDIT.
+
+package paths
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[PathTypeFile-0]
+	_ = x[PathTypeContentResource-1]
+	_ = x[PathTypeContentSingle-2]
+	_ = x[PathTypeLeaf-3]
+	_ = x[PathTypeBranch-4]
+}
+
+const _PathType_name = "PathTypeFilePathTypeContentResourcePathTypeContentSinglePathTypeLeafPathTypeBranch"
+
+var _PathType_index = [...]uint8{0, 12, 35, 56, 68, 82}
+
+func (i PathType) String() string {
+	if i < 0 || i >= PathType(len(_PathType_index)-1) {
+		return "PathType(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _PathType_name[_PathType_index[i]:_PathType_index[i+1]]
+}

common/paths/url.go

@@ -184,3 +184,13 @@ func UrlToFilename(s string) (string, bool) {
 
 	return p, true
 }
+
+// URLEscape escapes unicode letters.
+func URLEscape(uri string) string {
+	// escape unicode letters
+	u, err := url.Parse(uri)
+	if err != nil {
+		panic(err)
+	}
+	return u.String()
+}

common/predicate/predicate.go

@@ -0,0 +1,72 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package predicate
+
+// P is a predicate function that tests whether a value of type T satisfies some condition.
+type P[T any] func(T) bool
+
+// And returns a predicate that is a short-circuiting logical AND of this and the given predicates.
+func (p P[T]) And(ps ...P[T]) P[T] {
+	return func(v T) bool {
+		for _, pp := range ps {
+			if !pp(v) {
+				return false
+			}
+		}
+		return p(v)
+	}
+}
+
+// Or returns a predicate that is a short-circuiting logical OR of this and the given predicates.
+func (p P[T]) Or(ps ...P[T]) P[T] {
+	return func(v T) bool {
+		for _, pp := range ps {
+			if pp(v) {
+				return true
+			}
+		}
+		return p(v)
+	}
+}
+
+// Negate returns a predicate that is a logical negation of this predicate.
+func (p P[T]) Negate() P[T] {
+	return func(v T) bool {
+		return !p(v)
+	}
+}
+
+// Filter returns a new slice holding only the elements of s that satisfy p.
+// Filter modifies the contents of the slice s and returns the modified slice, which may have a smaller length.
+func (p P[T]) Filter(s []T) []T {
+	var n int
+	for _, v := range s {
+		if p(v) {
+			s[n] = v
+			n++
+		}
+	}
+	return s[:n]
+}
+
+// FilterCopy returns a new slice holding only the elements of s that satisfy p.
+func (p P[T]) FilterCopy(s []T) []T {
+	var result []T
+	for _, v := range s {
+		if p(v) {
+			result = append(result, v)
+		}
+	}
+	return result
+}

common/predicate/predicate_test.go

@@ -0,0 +1,83 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package predicate_test
+
+import (
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/common/predicate"
+)
+
+func TestAdd(t *testing.T) {
+	c := qt.New(t)
+
+	var p predicate.P[int] = intP1
+
+	c.Assert(p(1), qt.IsTrue)
+	c.Assert(p(2), qt.IsFalse)
+
+	neg := p.Negate()
+	c.Assert(neg(1), qt.IsFalse)
+	c.Assert(neg(2), qt.IsTrue)
+
+	and := p.And(intP2)
+	c.Assert(and(1), qt.IsFalse)
+	c.Assert(and(2), qt.IsFalse)
+	c.Assert(and(10), qt.IsTrue)
+
+	or := p.Or(intP2)
+	c.Assert(or(1), qt.IsTrue)
+	c.Assert(or(2), qt.IsTrue)
+	c.Assert(or(10), qt.IsTrue)
+	c.Assert(or(11), qt.IsFalse)
+}
+
+func TestFilter(t *testing.T) {
+	c := qt.New(t)
+
+	var p predicate.P[int] = intP1
+	p = p.Or(intP2)
+
+	ints := []int{1, 2, 3, 4, 1, 6, 7, 8, 2}
+
+	c.Assert(p.Filter(ints), qt.DeepEquals, []int{1, 2, 1, 2})
+	c.Assert(ints, qt.DeepEquals, []int{1, 2, 1, 2, 1, 6, 7, 8, 2})
+}
+
+func TestFilterCopy(t *testing.T) {
+	c := qt.New(t)
+
+	var p predicate.P[int] = intP1
+	p = p.Or(intP2)
+
+	ints := []int{1, 2, 3, 4, 1, 6, 7, 8, 2}
+
+	c.Assert(p.FilterCopy(ints), qt.DeepEquals, []int{1, 2, 1, 2})
+	c.Assert(ints, qt.DeepEquals, []int{1, 2, 3, 4, 1, 6, 7, 8, 2})
+}
+
+var intP1 = func(i int) bool {
+	if i == 10 {
+		return true
+	}
+	return i == 1
+}
+
+var intP2 = func(i int) bool {
+	if i == 10 {
+		return true
+	}
+	return i == 2
+}

common/rungroup/rungroup.go

@@ -0,0 +1,93 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rungroup
+
+import (
+	"context"
+
+	"golang.org/x/sync/errgroup"
+)
+
+// Group is a group of workers that can be used to enqueue work and wait for
+// them to finish.
+type Group[T any] interface {
+	Enqueue(T) error
+	Wait() error
+}
+
+type runGroup[T any] struct {
+	ctx context.Context
+	g   *errgroup.Group
+	ch  chan T
+}
+
+// Config is the configuration for a new Group.
+type Config[T any] struct {
+	NumWorkers int
+	Handle     func(context.Context, T) error
+}
+
+// Run creates a new Group with the given configuration.
+func Run[T any](ctx context.Context, cfg Config[T]) Group[T] {
+	if cfg.NumWorkers <= 0 {
+		cfg.NumWorkers = 1
+	}
+	if cfg.Handle == nil {
+		panic("Handle must be set")
+	}
+
+	g, ctx := errgroup.WithContext(ctx)
+	// Buffered for performance.
+	ch := make(chan T, cfg.NumWorkers)
+
+	for i := 0; i < cfg.NumWorkers; i++ {
+		g.Go(func() error {
+			for {
+				select {
+				case <-ctx.Done():
+					return nil
+				case v, ok := <-ch:
+					if !ok {
+						return nil
+					}
+					if err := cfg.Handle(ctx, v); err != nil {
+						return err
+					}
+				}
+			}
+		})
+	}
+
+	return &runGroup[T]{
+		ctx: ctx,
+		g:   g,
+		ch:  ch,
+	}
+}
+
+// Enqueue enqueues a new item to be handled by the workers.
+func (r *runGroup[T]) Enqueue(t T) error {
+	select {
+	case <-r.ctx.Done():
+		return nil
+	case r.ch <- t:
+	}
+	return nil
+}
+
+// Wait waits for all workers to finish and returns the first error.
+func (r *runGroup[T]) Wait() error {
+	close(r.ch)
+	return r.g.Wait()
+}

common/rungroup/rungroup_test.go

@@ -0,0 +1,44 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rungroup
+
+import (
+	"context"
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+)
+
+func TestNew(t *testing.T) {
+	c := qt.New(t)
+
+	var result int
+	adder := func(ctx context.Context, i int) error {
+		result += i
+		return nil
+	}
+
+	g := Run[int](
+		context.Background(),
+		Config[int]{
+			Handle: adder,
+		},
+	)
+
+	c.Assert(g, qt.IsNotNil)
+	g.Enqueue(32)
+	g.Enqueue(33)
+	c.Assert(g.Wait(), qt.IsNil)
+	c.Assert(result, qt.Equals, 65)
+}

common/terminal/colors.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

common/types/css/csstypes.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

common/types/evictingqueue.go

@@ -35,11 +35,11 @@ func NewEvictingStringQueue(size int) *EvictingStringQueue {
 }
 
 // Add adds a new string to the tail of the queue if it's not already there.
-func (q *EvictingStringQueue) Add(v string) {
+func (q *EvictingStringQueue) Add(v string) *EvictingStringQueue {
 	q.mu.Lock()
 	if q.set[v] {
 		q.mu.Unlock()
-		return
+		return q
 	}
 
 	if len(q.set) == q.size {
@@ -50,6 +50,17 @@ func (q *EvictingStringQueue) Add(v string) {
 	q.set[v] = true
 	q.vals = append(q.vals, v)
 	q.mu.Unlock()
+
+	return q
+}
+
+func (q *EvictingStringQueue) Len() int {
+	if q == nil {
+		return 0
+	}
+	q.mu.Lock()
+	defer q.mu.Unlock()
+	return len(q.vals)
 }
 
 // Contains returns whether the queue contains v.

common/types/hstring/stringtypes.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

common/types/hstring/stringtypes_test.go

@@ -1,4 +1,4 @@
-// Copyright 2022 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

common/types/types.go

@@ -92,5 +92,18 @@ type DevMarker interface {
 	DevOnly()
 }
 
+// Unwrapper is implemented by types that can unwrap themselves.
+type Unwrapper interface {
+	// Unwrapv is for internal use only.
+	// It got its slightly odd name to prevent collisions with user types.
+	Unwrapv() any
+}
+
+// LowHigh is typically used to represent a slice boundary.
+type LowHigh struct {
+	Low  int
+	High int
+}
+
 // This is only used for debugging purposes.
 var InvocationCounter atomic.Int64

common/urls/baseURL.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -23,10 +23,12 @@ import (
 // A BaseURL in Hugo is normally on the form scheme://path, but the
 // form scheme: is also valid (mailto:hugo@rules.com).
 type BaseURL struct {
-	url         *url.URL
+	url                     *url.URL
-	WithPath    string
+	WithPath                string
-	WithoutPath string
+	WithPathNoTrailingSlash string
-	BasePath    string
+	WithoutPath             string
+	BasePath                string
+	BasePathNoTrailingSlash string
 }
 
 func (b BaseURL) String() string {
@@ -92,19 +94,19 @@ func NewBaseURLFromString(b string) (BaseURL, error) {
 		return BaseURL{}, err
 	}
 	return newBaseURLFromURL(u)
-
 }
 
 func newBaseURLFromURL(u *url.URL) (BaseURL, error) {
-	baseURL := BaseURL{url: u, WithPath: u.String()}
+	// A baseURL should always have a trailing slash, see #11669.
-	var baseURLNoPath = baseURL.URL()
+	if !strings.HasSuffix(u.Path, "/") {
+		u.Path += "/"
+	}
+	baseURL := BaseURL{url: u, WithPath: u.String(), WithPathNoTrailingSlash: strings.TrimSuffix(u.String(), "/")}
+	baseURLNoPath := baseURL.URL()
 	baseURLNoPath.Path = ""
 	baseURL.WithoutPath = baseURLNoPath.String()
-
+	baseURL.BasePath = u.Path
-	basePath := u.Path
+	baseURL.BasePathNoTrailingSlash = strings.TrimSuffix(u.Path, "/")
-	if basePath != "" && basePath != "/" {
-		baseURL.BasePath = basePath
-	}
 
 	return baseURL, nil
 }

common/urls/baseURL_test.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -21,17 +21,24 @@ import (
 
 func TestBaseURL(t *testing.T) {
 	c := qt.New(t)
-	b, err := NewBaseURLFromString("http://example.com")
+
+	b, err := NewBaseURLFromString("http://example.com/")
 	c.Assert(err, qt.IsNil)
-	c.Assert(b.String(), qt.Equals, "http://example.com")
+	c.Assert(b.String(), qt.Equals, "http://example.com/")
+
+	b, err = NewBaseURLFromString("http://example.com")
+	c.Assert(err, qt.IsNil)
+	c.Assert(b.String(), qt.Equals, "http://example.com/")
+	c.Assert(b.WithPathNoTrailingSlash, qt.Equals, "http://example.com")
+	c.Assert(b.BasePath, qt.Equals, "/")
 
 	p, err := b.WithProtocol("webcal://")
 	c.Assert(err, qt.IsNil)
-	c.Assert(p.String(), qt.Equals, "webcal://example.com")
+	c.Assert(p.String(), qt.Equals, "webcal://example.com/")
 
 	p, err = b.WithProtocol("webcal")
 	c.Assert(err, qt.IsNil)
-	c.Assert(p.String(), qt.Equals, "webcal://example.com")
+	c.Assert(p.String(), qt.Equals, "webcal://example.com/")
 
 	_, err = b.WithProtocol("mailto:")
 	c.Assert(err, qt.Not(qt.IsNil))
@@ -57,11 +64,18 @@ func TestBaseURL(t *testing.T) {
 
 	b, err = NewBaseURLFromString("")
 	c.Assert(err, qt.IsNil)
-	c.Assert(b.String(), qt.Equals, "")
+	c.Assert(b.String(), qt.Equals, "/")
 
 	// BaseURL with sub path
 	b, err = NewBaseURLFromString("http://example.com/sub")
 	c.Assert(err, qt.IsNil)
-	c.Assert(b.String(), qt.Equals, "http://example.com/sub")
+	c.Assert(b.String(), qt.Equals, "http://example.com/sub/")
+	c.Assert(b.WithPathNoTrailingSlash, qt.Equals, "http://example.com/sub")
+	c.Assert(b.BasePath, qt.Equals, "/sub/")
+	c.Assert(b.BasePathNoTrailingSlash, qt.Equals, "/sub")
+
+	b, err = NewBaseURLFromString("http://example.com/sub/")
+	c.Assert(err, qt.IsNil)
+	c.Assert(b.String(), qt.Equals, "http://example.com/sub/")
 	c.Assert(b.HostURL(), qt.Equals, "http://example.com")
 }

compare/compare.go

@@ -52,3 +52,16 @@ func Eq(v1, v2 any) bool {
 
 	return v1 == v2
 }
+
+// ProbablyEq returns whether v1 is probably equal to v2.
+func ProbablyEq(v1, v2 any) bool {
+	if Eq(v1, v2) {
+		return true
+	}
+
+	if peqer, ok := v1.(ProbablyEqer); ok {
+		return peqer.ProbablyEq(v2)
+	}
+
+	return false
+}

config/allconfig/allconfig.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -30,6 +30,7 @@ import (
 	"github.com/gohugoio/hugo/common/hugo"
 	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/common/maps"
+	"github.com/gohugoio/hugo/common/paths"
 	"github.com/gohugoio/hugo/common/urls"
 	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/config/privacy"
@@ -283,12 +284,13 @@ func (c *Config) CompileConfig(logger loggers.Logger) error {
 
 	disabledLangs := make(map[string]bool)
 	for _, lang := range c.DisableLanguages {
-		if lang == c.DefaultContentLanguage {
-			return fmt.Errorf("cannot disable default content language %q", lang)
-		}
 		disabledLangs[lang] = true
 	}
 	for lang, language := range c.Languages {
+		if !language.Disabled && disabledLangs[lang] {
+			language.Disabled = true
+			c.Languages[lang] = language
+		}
 		if language.Disabled {
 			disabledLangs[lang] = true
 			if lang == c.DefaultContentLanguage {
@@ -408,15 +410,19 @@ type ConfigCompiled struct {
 }
 
 // This may be set after the config is compiled.
-func (c *ConfigCompiled) SetMainSectionsIfNotSet(sections []string) {
+func (c *ConfigCompiled) SetMainSections(sections []string) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	if c.MainSections != nil {
-		return
-	}
 	c.MainSections = sections
 }
 
+// IsMainSectionsSet returns whether the main sections have been set.
+func (c *ConfigCompiled) IsMainSectionsSet() bool {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	return c.MainSections != nil
+}
+
 // This is set after the config is compiled by the server command.
 func (c *ConfigCompiled) SetBaseURL(baseURL, baseURLLiveReload urls.BaseURL) {
 	c.BaseURL = baseURL
@@ -425,7 +431,6 @@ func (c *ConfigCompiled) SetBaseURL(baseURL, baseURLLiveReload urls.BaseURL) {
 
 // RootConfig holds all the top-level configuration options in Hugo
 type RootConfig struct {
-
 	// The base URL of the site.
 	// Note that the default value is empty, but Hugo requires a valid URL (e.g. "https://example.com/") to work properly.
 	// <docsmeta>{"identifiers": ["URL"] }</docsmeta>
@@ -648,13 +653,16 @@ type Configs struct {
 	LanguageConfigMap   map[string]*Config
 	LanguageConfigSlice []*Config
 
-	IsMultihost           bool
+	IsMultihost bool
-	Languages             langs.Languages
-	LanguagesDefaultFirst langs.Languages
 
 	Modules       modules.Modules
 	ModulesClient *modules.Client
 
+	// All below is set in Init.
+	Languages             langs.Languages
+	LanguagesDefaultFirst langs.Languages
+	ContentPathParser     paths.PathParser
+
 	configLangs []config.AllProvider
 }
 
@@ -674,6 +682,58 @@ func (c *Configs) IsZero() bool {
 }
 
 func (c *Configs) Init() error {
+	var languages langs.Languages
+	defaultContentLanguage := c.Base.DefaultContentLanguage
+	for k, v := range c.LanguageConfigMap {
+		c.LanguageConfigSlice = append(c.LanguageConfigSlice, v)
+		languageConf := v.Languages[k]
+		language, err := langs.NewLanguage(k, defaultContentLanguage, v.TimeZone, languageConf)
+		if err != nil {
+			return err
+		}
+		languages = append(languages, language)
+	}
+
+	// Sort the sites by language weight (if set) or lang.
+	sort.Slice(languages, func(i, j int) bool {
+		li := languages[i]
+		lj := languages[j]
+		if li.Weight != lj.Weight {
+			return li.Weight < lj.Weight
+		}
+		return li.Lang < lj.Lang
+	})
+
+	for _, l := range languages {
+		c.LanguageConfigSlice = append(c.LanguageConfigSlice, c.LanguageConfigMap[l.Lang])
+	}
+
+	// Filter out disabled languages.
+	var n int
+	for _, l := range languages {
+		if !l.Disabled {
+			languages[n] = l
+			n++
+		}
+	}
+	languages = languages[:n]
+
+	var languagesDefaultFirst langs.Languages
+	for _, l := range languages {
+		if l.Lang == defaultContentLanguage {
+			languagesDefaultFirst = append(languagesDefaultFirst, l)
+		}
+	}
+	for _, l := range languages {
+		if l.Lang != defaultContentLanguage {
+			languagesDefaultFirst = append(languagesDefaultFirst, l)
+		}
+	}
+
+	c.Languages = languages
+	c.LanguagesDefaultFirst = languagesDefaultFirst
+	c.ContentPathParser = paths.PathParser{LanguageIndex: languagesDefaultFirst.AsIndexSet()}
+
 	c.configLangs = make([]config.AllProvider, len(c.Languages))
 	for i, l := range c.LanguagesDefaultFirst {
 		c.configLangs[i] = ConfigLanguage{
@@ -751,7 +811,6 @@ func fromLoadConfigResult(fs afero.Fs, logger loggers.Logger, res config.LoadCon
 	}
 
 	langConfigMap := make(map[string]*Config)
-	var langConfigs []*Config
 
 	languagesConfig := cfg.GetStringMap("languages")
 	var isMultiHost bool
@@ -848,65 +907,24 @@ func fromLoadConfigResult(fs afero.Fs, logger loggers.Logger, res config.LoadCon
 		}
 	}
 
-	var languages langs.Languages
-	defaultContentLanguage := all.DefaultContentLanguage
-	for k, v := range langConfigMap {
-		languageConf := v.Languages[k]
-		language, err := langs.NewLanguage(k, defaultContentLanguage, v.TimeZone, languageConf)
-		if err != nil {
-			return nil, err
-		}
-		languages = append(languages, language)
-	}
-
-	// Sort the sites by language weight (if set) or lang.
-	sort.Slice(languages, func(i, j int) bool {
-		li := languages[i]
-		lj := languages[j]
-		if li.Weight != lj.Weight {
-			return li.Weight < lj.Weight
-		}
-		return li.Lang < lj.Lang
-	})
-
-	for _, l := range languages {
-		langConfigs = append(langConfigs, langConfigMap[l.Lang])
-	}
-
-	var languagesDefaultFirst langs.Languages
-	for _, l := range languages {
-		if l.Lang == defaultContentLanguage {
-			languagesDefaultFirst = append(languagesDefaultFirst, l)
-		}
-	}
-	for _, l := range languages {
-		if l.Lang != defaultContentLanguage {
-			languagesDefaultFirst = append(languagesDefaultFirst, l)
-		}
-	}
-
 	bcfg.PublishDir = all.PublishDir
 	res.BaseConfig = bcfg
 	all.CommonDirs.CacheDir = bcfg.CacheDir
-	for _, l := range langConfigs {
+	for _, l := range langConfigMap {
 		l.CommonDirs.CacheDir = bcfg.CacheDir
 	}
 
 	cm := &Configs{
-		Base:                  all,
+		Base:              all,
-		LanguageConfigMap:     langConfigMap,
+		LanguageConfigMap: langConfigMap,
-		LanguageConfigSlice:   langConfigs,
+		LoadingInfo:       res,
-		LoadingInfo:           res,
+		IsMultihost:       isMultiHost,
-		IsMultihost:           isMultiHost,
-		Languages:             languages,
-		LanguagesDefaultFirst: languagesDefaultFirst,
 	}
 
 	return cm, nil
 }
 
 func decodeConfigFromParams(fs afero.Fs, logger loggers.Logger, bcfg config.BaseConfig, p config.Provider, target *Config, keys []string) error {
-
 	var decoderSetups []decodeWeight
 
 	if len(keys) == 0 {

config/allconfig/alldecoders.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

config/allconfig/configlanguage.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@ package allconfig
 import (
 	"time"
 
+	"github.com/gohugoio/hugo/common/paths"
 	"github.com/gohugoio/hugo/common/urls"
 	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/langs"
@@ -41,10 +42,15 @@ func (c ConfigLanguage) LanguagesDefaultFirst() langs.Languages {
 	return c.m.LanguagesDefaultFirst
 }
 
+func (c ConfigLanguage) PathParser() paths.PathParser {
+	return c.m.ContentPathParser
+}
+
 func (c ConfigLanguage) LanguagePrefix() string {
 	if c.DefaultContentLanguageInSubdir() && c.DefaultContentLanguage() == c.Language().Lang {
 		return c.Language().Lang
 	}
+
 	if !c.IsMultiLingual() || c.DefaultContentLanguage() == c.Language().Lang {
 		return ""
 	}
@@ -119,6 +125,10 @@ func (c ConfigLanguage) Quiet() bool {
 	return c.m.Base.Internal.Quiet
 }
 
+func (c ConfigLanguage) Watching() bool {
+	return c.m.Base.Internal.Watch
+}
+
 // GetConfigSection is mostly used in tests. The switch statement isn't complete, but what's in use.
 func (c ConfigLanguage) GetConfigSection(s string) any {
 	switch s {

config/allconfig/docshelper.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -22,7 +22,6 @@ import (
 // This is is just some helpers used to create some JSON used in the Hugo docs.
 func init() {
 	docsProvider := func() docshelper.DocProvider {
-
 		cfg := config.New()
 		for configRoot, v := range allDecoderSetups {
 			if v.internalOrDeprecated {

config/allconfig/integration_test.go

@@ -10,7 +10,6 @@ import (
 )
 
 func TestDirsMount(t *testing.T) {
-
 	files := `
 -- hugo.toml --
 baseURL = "https://example.com"
@@ -44,7 +43,7 @@ Title: {{ .Title }}
 		hugolib.IntegrationTestConfig{T: t, TxtarString: files},
 	).Build()
 
-	//b.AssertFileContent("public/p1/index.html", "Title: p1")
+	// b.AssertFileContent("public/p1/index.html", "Title: p1")
 
 	sites := b.H.Sites
 	b.Assert(len(sites), qt.Equals, 2)
@@ -58,7 +57,7 @@ Title: {{ .Title }}
 	enConcp := sites[0].Conf
 	enConf := enConcp.GetConfig().(*allconfig.Config)
 
-	b.Assert(enConcp.BaseURL().String(), qt.Equals, "https://example.com")
+	b.Assert(enConcp.BaseURL().String(), qt.Equals, "https://example.com/")
 	modConf := enConf.Module
 	b.Assert(modConf.Mounts, qt.HasLen, 8)
 	b.Assert(modConf.Mounts[0].Source, qt.Equals, filepath.FromSlash("content/en"))
@@ -67,11 +66,9 @@ Title: {{ .Title }}
 	b.Assert(modConf.Mounts[1].Source, qt.Equals, filepath.FromSlash("content/sv"))
 	b.Assert(modConf.Mounts[1].Target, qt.Equals, "content")
 	b.Assert(modConf.Mounts[1].Lang, qt.Equals, "sv")
-
 }
 
 func TestConfigAliases(t *testing.T) {
-
 	files := `
 -- hugo.toml --
 baseURL = "https://example.com"

config/allconfig/load.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -37,6 +37,7 @@ import (
 	"github.com/spf13/afero"
 )
 
+//lint:ignore ST1005 end user message.
 var ErrNoConfigFile = errors.New("Unable to locate config file or config directory. Perhaps you need to create a new site.\n       Run `hugo help new` for details.\n")
 
 func LoadConfig(d ConfigSourceDescriptor) (*Configs, error) {
@@ -566,15 +567,6 @@ func (l configLoader) deleteMergeStrategies() {
 	})
 }
 
-func (l configLoader) loadModulesConfig() (modules.Config, error) {
-	modConfig, err := modules.DecodeConfig(l.cfg)
-	if err != nil {
-		return modules.Config{}, err
-	}
-
-	return modConfig, nil
-}
-
 func (l configLoader) wrapFileError(err error, filename string) error {
 	fe := herrors.UnwrapFileError(err)
 	if fe != nil {

config/commonConfig.go

@@ -85,29 +85,22 @@ var defaultBuild = BuildConfig{
 	BuildStats:           BuildStats{},
 
 	CacheBusters: []CacheBuster{
-		{
-			Source: `assets/.*\.(js|ts|jsx|tsx)`,
-			Target: `(js|scripts|javascript)`,
-		},
-		{
-			Source: `assets/.*\.(css|sass|scss)$`,
-			Target: cssTargetCachebusterRe,
-		},
 		{
 			Source: `(postcss|tailwind)\.config\.js`,
 			Target: cssTargetCachebusterRe,
 		},
-		// This is deliberately coarse grained; it will cache bust resources with "json" in the cache key when js files changes, which is good.
-		{
-			Source: `assets/.*\.(.*)$`,
-			Target: `$1`,
-		},
 	},
 }
 
 // BuildConfig holds some build related configuration.
 type BuildConfig struct {
-	UseResourceCacheWhen string // never, fallback, always. Default is fallback
+	// When to use the resource file cache.
+	// One of never, fallback, always. Default is fallback
+	UseResourceCacheWhen string
+
+	// When enabled, will duplicate bundled resource files across languages that
+	// doesn't have a translated version.
+	DuplicateResourceFiles bool
 
 	// When enabled, will collect and write a hugo_stats.json with some build
 	// related aggregated data (e.g. CSS class names).
@@ -373,7 +366,6 @@ func (c *CacheBuster) CompileConfig(logger loggers.Logger) error {
 
 			return match
 		}
-
 	}
 	return compileErr
 }
@@ -416,7 +408,6 @@ func DecodeServer(cfg Provider) (Server, error) {
 				Status: 404,
 			},
 		}
-
 	}
 
 	return *s, nil

config/commonConfig_test.go

@@ -148,21 +148,13 @@ func TestBuildConfigCacheBusters(t *testing.T) {
 	l := loggers.NewDefault()
 	c.Assert(conf.CompileConfig(l), qt.IsNil)
 
-	m, err := conf.MatchCacheBuster(l, "assets/foo/main.js")
+	m, _ := conf.MatchCacheBuster(l, "tailwind.config.js")
-	c.Assert(err, qt.IsNil)
 	c.Assert(m, qt.IsNotNil)
-	c.Assert(m("scripts"), qt.IsTrue)
-	c.Assert(m("asdf"), qt.IsFalse)
-
-	m, _ = conf.MatchCacheBuster(l, "tailwind.config.js")
 	c.Assert(m("css"), qt.IsTrue)
 	c.Assert(m("js"), qt.IsFalse)
 
-	m, err = conf.MatchCacheBuster(l, "assets/foo.json")
+	m, _ = conf.MatchCacheBuster(l, "foo.bar")
-	c.Assert(err, qt.IsNil)
+	c.Assert(m, qt.IsNil)
-	c.Assert(m, qt.IsNotNil)
-	c.Assert(m("json"), qt.IsTrue)
-
 }
 
 func TestBuildConfigCacheBusterstTailwindSetup(t *testing.T) {

config/configProvider.go

@@ -17,6 +17,7 @@ import (
 	"time"
 
 	"github.com/gohugoio/hugo/common/maps"
+	"github.com/gohugoio/hugo/common/paths"
 	"github.com/gohugoio/hugo/common/types"
 	"github.com/gohugoio/hugo/common/urls"
 	"github.com/gohugoio/hugo/langs"
@@ -30,6 +31,7 @@ type AllProvider interface {
 	LanguagePrefix() string
 	BaseURL() urls.BaseURL
 	BaseURLLiveReload() urls.BaseURL
+	PathParser() paths.PathParser
 	Environment() string
 	IsMultihost() bool
 	IsMultiLingual() bool
@@ -54,6 +56,7 @@ type AllProvider interface {
 	BuildFuture() bool
 	BuildDrafts() bool
 	Running() bool
+	Watching() bool
 	PrintUnusedTemplates() bool
 	EnableMissingTranslationPlaceholders() bool
 	TemplateMetrics() bool

config/env.go

@@ -18,6 +18,12 @@ import (
 	"runtime"
 	"strconv"
 	"strings"
+
+	"github.com/pbnjay/memory"
+)
+
+const (
+	gigabyte = 1 << 30
 )
 
 // GetNumWorkerMultiplier returns the base value used to calculate the number
@@ -33,6 +39,37 @@ func GetNumWorkerMultiplier() int {
 	return runtime.NumCPU()
 }
 
+// GetMemoryLimit returns the upper memory limit in bytes for Hugo's in-memory caches.
+// Note that this does not represent "all of the memory" that Hugo will use,
+// so it needs to be set to a lower number than the available system memory.
+// It will read from the HUGO_MEMORYLIMIT (in Gigabytes) environment variable.
+// If that is not set, it will set aside a quarter of the total system memory.
+func GetMemoryLimit() uint64 {
+	if mem := os.Getenv("HUGO_MEMORYLIMIT"); mem != "" {
+		if v := stringToGibabyte(mem); v > 0 {
+			return v
+		}
+
+	}
+
+	// There is a FreeMemory function, but as the kernel in most situations
+	// will take whatever memory that is left and use for caching etc.,
+	// that value is not something that we can use.
+	m := memory.TotalMemory()
+	if m != 0 {
+		return uint64(m / 4)
+	}
+
+	return 2 * gigabyte
+}
+
+func stringToGibabyte(f string) uint64 {
+	if v, err := strconv.ParseFloat(f, 32); err == nil && v > 0 {
+		return uint64(v * gigabyte)
+	}
+	return 0
+}
+
 // SetEnvVars sets vars on the form key=value in the oldVars slice.
 func SetEnvVars(oldVars *[]string, keyValues ...string) {
 	for i := 0; i < len(keyValues); i += 2 {

config/namespace.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -20,7 +20,6 @@ import (
 )
 
 func DecodeNamespace[S, C any](configSource any, buildConfig func(any) (C, any, error)) (*ConfigNamespace[S, C], error) {
-
 	// Calculate the hash of the input (not including any defaults applied later).
 	// This allows us to introduce new config options without breaking the hash.
 	h := identity.HashString(configSource)

config/namespace_test.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -26,7 +26,7 @@ func TestNamespace(t *testing.T) {
 	c := qt.New(t)
 	c.Assert(true, qt.Equals, true)
 
-	//ns, err := config.DecodeNamespace[map[string]DocsMediaTypeConfig](in, defaultMediaTypesConfig, buildConfig)
+	// ns, err := config.DecodeNamespace[map[string]DocsMediaTypeConfig](in, defaultMediaTypesConfig, buildConfig)
 
 	ns, err := DecodeNamespace[[]*tstNsExt](
 		map[string]interface{}{"foo": "bar"},
@@ -46,23 +46,15 @@ func TestNamespace(t *testing.T) {
 	c.Assert(ns.SourceHash, qt.Equals, "14368731254619220105")
 	c.Assert(ns.Config, qt.DeepEquals, &tstNsExt{Foo: "bar"})
 	c.Assert(ns.Signature(), qt.DeepEquals, []*tstNsExt(nil))
-
 }
 
 type (
 	tstNsExt struct {
 		Foo string
 	}
-	tstNsInt struct {
-		Foo string
-	}
 )
 
 func (t *tstNsExt) Init() error {
 	t.Foo = strings.ToUpper(t.Foo)
 	return nil
 }
-func (t *tstNsInt) Compile(ext *tstNsExt) error {
-	t.Foo = ext.Foo + " qux"
-	return nil
-}

config/testconfig/testconfig.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -36,7 +36,7 @@ func GetTestConfigs(fs afero.Fs, cfg config.Provider) *allconfig.Configs {
 	// Make sure that the workingDir exists.
 	workingDir := cfg.GetString("workingDir")
 	if workingDir != "" {
-		if err := fs.MkdirAll(workingDir, 0777); err != nil {
+		if err := fs.MkdirAll(workingDir, 0o777); err != nil {
 			panic(err)
 		}
 	}
@@ -46,7 +46,6 @@ func GetTestConfigs(fs afero.Fs, cfg config.Provider) *allconfig.Configs {
 		panic(err)
 	}
 	return configs
-
 }
 
 func GetTestConfig(fs afero.Fs, cfg config.Provider) config.AllProvider {

create/content.go

@@ -16,6 +16,7 @@ package create
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -25,10 +26,9 @@ import (
 	"github.com/gohugoio/hugo/hugofs/glob"
 
 	"github.com/gohugoio/hugo/common/hexec"
+	"github.com/gohugoio/hugo/common/hstrings"
 	"github.com/gohugoio/hugo/common/paths"
 
-	"errors"
-
 	"github.com/gohugoio/hugo/hugofs/files"
 
 	"github.com/gohugoio/hugo/hugofs"
@@ -53,7 +53,7 @@ draft: true
 // NewContent creates a new content file in h (or a full bundle if the archetype is a directory)
 // in targetPath.
 func NewContent(h *hugolib.HugoSites, kind, targetPath string, force bool) error {
-	if h.BaseFs.Content.Dirs == nil {
+	if _, err := h.BaseFs.Content.Fs.Stat(""); err != nil {
 		return errors.New("no existing content directory configured for this project")
 	}
 
@@ -103,7 +103,6 @@ func NewContent(h *hugolib.HugoSites, kind, targetPath string, force bool) error
 		}
 
 		return b.buildFile()
-
 	}
 
 	filename, err := withBuildLock()
@@ -116,7 +115,6 @@ func NewContent(h *hugolib.HugoSites, kind, targetPath string, force bool) error
 	}
 
 	return nil
-
 }
 
 type contentBuilder struct {
@@ -128,12 +126,12 @@ type contentBuilder struct {
 	cf hugolib.ContentFactory
 
 	// Builder state
-	archetypeFilename string
+	archetypeFi hugofs.FileMetaInfo
-	targetPath        string
+	targetPath  string
-	kind              string
+	kind        string
-	isDir             bool
+	isDir       bool
-	dirMap            archetypeMap
+	dirMap      archetypeMap
-	force             bool
+	force       bool
 }
 
 func (b *contentBuilder) buildDir() error {
@@ -146,7 +144,10 @@ func (b *contentBuilder) buildDir() error {
 	var baseDir string
 
 	for _, fi := range b.dirMap.contentFiles {
-		targetFilename := filepath.Join(b.targetPath, strings.TrimPrefix(fi.Meta().Path, b.archetypeFilename))
+
+		targetFilename := filepath.Join(b.targetPath, strings.TrimPrefix(fi.Meta().PathInfo.Path(), b.archetypeFi.Meta().PathInfo.Path()))
+
+		// ===> post/my-post/pages/bio.md
 		abs, err := b.cf.CreateContentPlaceHolder(targetFilename, b.force)
 		if err != nil {
 			return err
@@ -170,7 +171,6 @@ func (b *contentBuilder) buildDir() error {
 			}
 			return false
 		})
-
 	}
 
 	if err := b.h.Build(hugolib.BuildCfg{NoBuildLock: true, SkipRender: true, ContentInclusionFilter: contentInclusionFilter}); err != nil {
@@ -178,22 +178,20 @@ func (b *contentBuilder) buildDir() error {
 	}
 
 	for i, filename := range contentTargetFilenames {
-		if err := b.applyArcheType(filename, b.dirMap.contentFiles[i].Meta().Path); err != nil {
+		if err := b.applyArcheType(filename, b.dirMap.contentFiles[i]); err != nil {
 			return err
 		}
 	}
 
 	// Copy the rest as is.
-	for _, f := range b.dirMap.otherFiles {
+	for _, fi := range b.dirMap.otherFiles {
-		meta := f.Meta()
+		meta := fi.Meta()
-		filename := meta.Path
 
 		in, err := meta.Open()
 		if err != nil {
 			return fmt.Errorf("failed to open non-content file: %w", err)
 		}
-
+		targetFilename := filepath.Join(baseDir, b.targetPath, strings.TrimPrefix(fi.Meta().Filename, b.archetypeFi.Meta().Filename))
-		targetFilename := filepath.Join(baseDir, b.targetPath, strings.TrimPrefix(filename, b.archetypeFilename))
 		targetDir := filepath.Dir(targetFilename)
 
 		if err := b.sourceFs.MkdirAll(targetDir, 0o777); err != nil && !os.IsExist(err) {
@@ -225,7 +223,7 @@ func (b *contentBuilder) buildFile() (string, error) {
 		return "", err
 	}
 
-	usesSite, err := b.usesSiteVar(b.archetypeFilename)
+	usesSite, err := b.usesSiteVar(b.archetypeFi)
 	if err != nil {
 		return "", err
 	}
@@ -243,7 +241,7 @@ func (b *contentBuilder) buildFile() (string, error) {
 		return "", err
 	}
 
-	if err := b.applyArcheType(contentPlaceholderAbsFilename, b.archetypeFilename); err != nil {
+	if err := b.applyArcheType(contentPlaceholderAbsFilename, b.archetypeFi); err != nil {
 		return "", err
 	}
 
@@ -264,15 +262,14 @@ func (b *contentBuilder) setArcheTypeFilenameToUse(ext string) {
 	for _, p := range pathsToCheck {
 		fi, err := b.archeTypeFs.Stat(p)
 		if err == nil {
-			b.archetypeFilename = p
+			b.archetypeFi = fi.(hugofs.FileMetaInfo)
 			b.isDir = fi.IsDir()
 			return
 		}
 	}
-
 }
 
-func (b *contentBuilder) applyArcheType(contentFilename, archetypeFilename string) error {
+func (b *contentBuilder) applyArcheType(contentFilename string, archetypeFi hugofs.FileMetaInfo) error {
 	p := b.h.GetContentPage(contentFilename)
 	if p == nil {
 		panic(fmt.Sprintf("[BUG] no Page found for %q", contentFilename))
@@ -284,32 +281,39 @@ func (b *contentBuilder) applyArcheType(contentFilename, archetypeFilename strin
 	}
 	defer f.Close()
 
-	if archetypeFilename == "" {
+	if archetypeFi == nil {
 		return b.cf.ApplyArchetypeTemplate(f, p, b.kind, DefaultArchetypeTemplateTemplate)
 	}
 
-	return b.cf.ApplyArchetypeFilename(f, p, b.kind, archetypeFilename)
+	return b.cf.ApplyArchetypeFi(f, p, b.kind, archetypeFi)
-
 }
 
 func (b *contentBuilder) mapArcheTypeDir() error {
 	var m archetypeMap
 
-	walkFn := func(path string, fi hugofs.FileMetaInfo, err error) error {
+	seen := map[hstrings.Tuple]bool{}
-		if err != nil {
-			return err
-		}
 
-		if fi.IsDir() {
+	walkFn := func(path string, fim hugofs.FileMetaInfo) error {
+		if fim.IsDir() {
 			return nil
 		}
 
-		fil := fi.(hugofs.FileMetaInfo)
+		pi := fim.Meta().PathInfo
 
-		if files.IsContentFile(path) {
+		if pi.IsContent() {
-			m.contentFiles = append(m.contentFiles, fil)
+			pathLang := hstrings.Tuple{First: pi.PathNoIdentifier(), Second: fim.Meta().Lang}
+			if seen[pathLang] {
+				// Duplicate content file, e.g. page.md and page.html.
+				// In the regular build, we will filter out the duplicates, but
+				// for archetype folders these are ambiguous and we need to
+				// fail.
+				return fmt.Errorf("duplicate content file found in archetype folder: %q; having both e.g. %s.md and %s.html is ambigous", path, pi.BaseNameNoIdentifier(), pi.BaseNameNoIdentifier())
+			}
+			seen[pathLang] = true
+			m.contentFiles = append(m.contentFiles, fim)
 			if !m.siteUsed {
-				m.siteUsed, err = b.usesSiteVar(path)
+				var err error
+				m.siteUsed, err = b.usesSiteVar(fim)
 				if err != nil {
 					return err
 				}
@@ -317,7 +321,7 @@ func (b *contentBuilder) mapArcheTypeDir() error {
 			return nil
 		}
 
-		m.otherFiles = append(m.otherFiles, fil)
+		m.otherFiles = append(m.otherFiles, fim)
 
 		return nil
 	}
@@ -325,13 +329,13 @@ func (b *contentBuilder) mapArcheTypeDir() error {
 	walkCfg := hugofs.WalkwayConfig{
 		WalkFn: walkFn,
 		Fs:     b.archeTypeFs,
-		Root:   b.archetypeFilename,
+		Root:   filepath.FromSlash(b.archetypeFi.Meta().PathInfo.Path()),
 	}
 
 	w := hugofs.NewWalkway(walkCfg)
 
 	if err := w.Walk(); err != nil {
-		return fmt.Errorf("failed to walk archetype dir %q: %w", b.archetypeFilename, err)
+		return fmt.Errorf("failed to walk archetype dir %q: %w", b.archetypeFi.Meta().Filename, err)
 	}
 
 	b.dirMap = m
@@ -370,17 +374,21 @@ func (b *contentBuilder) openInEditorIfConfigured(filename string) error {
 	return cmd.Run()
 }
 
-func (b *contentBuilder) usesSiteVar(filename string) (bool, error) {
+func (b *contentBuilder) usesSiteVar(fi hugofs.FileMetaInfo) (bool, error) {
-	if filename == "" {
+	if fi == nil {
 		return false, nil
 	}
-	bb, err := afero.ReadFile(b.archeTypeFs, filename)
+	f, err := fi.Meta().Open()
 	if err != nil {
-		return false, fmt.Errorf("failed to open archetype file: %w", err)
+		return false, err
+	}
+	defer f.Close()
+	bb, err := io.ReadAll(f)
+	if err != nil {
+		return false, fmt.Errorf("failed to read archetype file: %w", err)
 	}
 
 	return bytes.Contains(bb, []byte(".Site")) || bytes.Contains(bb, []byte("site.")), nil
-
 }
 
 type archetypeMap struct {

create/content_test.go

@@ -114,58 +114,6 @@ func TestNewContentFromFile(t *testing.T) {
 	}
 }
 
-func TestNewContentFromDir(t *testing.T) {
-	mm := afero.NewMemMapFs()
-	c := qt.New(t)
-
-	archetypeDir := filepath.Join("archetypes", "my-bundle")
-	c.Assert(mm.MkdirAll(archetypeDir, 0o755), qt.IsNil)
-
-	archetypeThemeDir := filepath.Join("themes", "mytheme", "archetypes", "my-theme-bundle")
-	c.Assert(mm.MkdirAll(archetypeThemeDir, 0o755), qt.IsNil)
-
-	contentFile := `
-File: %s
-Site Lang: {{ .Site.Language.Lang  }} 	
-Name: {{ replace .Name "-" " " | title }}
-i18n: {{ T "hugo" }}
-`
-
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "index.md"), []byte(fmt.Sprintf(contentFile, "index.md")), 0o755), qt.IsNil)
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "index.nn.md"), []byte(fmt.Sprintf(contentFile, "index.nn.md")), 0o755), qt.IsNil)
-
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "pages", "bio.md"), []byte(fmt.Sprintf(contentFile, "bio.md")), 0o755), qt.IsNil)
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "resources", "hugo1.json"), []byte(`hugo1: {{ printf "no template handling in here" }}`), 0o755), qt.IsNil)
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "resources", "hugo2.xml"), []byte(`hugo2: {{ printf "no template handling in here" }}`), 0o755), qt.IsNil)
-
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeThemeDir, "index.md"), []byte(fmt.Sprintf(contentFile, "index.md")), 0o755), qt.IsNil)
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeThemeDir, "resources", "hugo1.json"), []byte(`hugo1: {{ printf "no template handling in here" }}`), 0o755), qt.IsNil)
-
-	c.Assert(initFs(mm), qt.IsNil)
-	cfg, fs := newTestCfg(c, mm)
-
-	conf := testconfig.GetTestConfigs(fs.Source, cfg)
-	h, err := hugolib.NewHugoSites(deps.DepsCfg{Configs: conf, Fs: fs})
-	c.Assert(err, qt.IsNil)
-	c.Assert(len(h.Sites), qt.Equals, 2)
-
-	c.Assert(create.NewContent(h, "my-bundle", "post/my-post", false), qt.IsNil)
-
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-post/resources/hugo1.json")), `hugo1: {{ printf "no template handling in here" }}`)
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-post/resources/hugo2.xml")), `hugo2: {{ printf "no template handling in here" }}`)
-
-	// Content files should get the correct site context.
-	// TODO(bep) archetype check i18n
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-post/index.md")), `File: index.md`, `Site Lang: en`, `Name: My Post`, `i18n: Hugo Rocks!`)
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-post/index.nn.md")), `File: index.nn.md`, `Site Lang: nn`, `Name: My Post`, `i18n: Hugo Rokkar!`)
-
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-post/pages/bio.md")), `File: bio.md`, `Site Lang: en`, `Name: Bio`)
-
-	c.Assert(create.NewContent(h, "my-theme-bundle", "post/my-theme-post", false), qt.IsNil)
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-theme-post/index.md")), `File: index.md`, `Site Lang: en`, `Name: My Theme Post`, `i18n: Hugo Rocks!`)
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-theme-post/resources/hugo1.json")), `hugo1: {{ printf "no template handling in here" }}`)
-}
-
 func TestNewContentFromDirSiteFunction(t *testing.T) {
 	mm := afero.NewMemMapFs()
 	c := qt.New(t)
@@ -206,83 +154,6 @@ site RegularPages: {{ len site.RegularPages  }}
 	// Regular files should fall back to the default archetype (we have no regular file archetype).
 	c.Assert(create.NewContent(h, "my-bundle", "mypage.md", false), qt.IsNil)
 	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "mypage.md")), `draft: true`)
-
-}
-
-func TestNewContentFromDirNoSite(t *testing.T) {
-	mm := afero.NewMemMapFs()
-	c := qt.New(t)
-
-	archetypeDir := filepath.Join("archetypes", "my-bundle")
-	c.Assert(mm.MkdirAll(archetypeDir, 0o755), qt.IsNil)
-
-	archetypeThemeDir := filepath.Join("themes", "mytheme", "archetypes", "my-theme-bundle")
-	c.Assert(mm.MkdirAll(archetypeThemeDir, 0o755), qt.IsNil)
-
-	contentFile := `
-File: %s
-Name: {{ replace .Name "-" " " | title }}
-i18n: {{ T "hugo" }}
-`
-
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "index.md"), []byte(fmt.Sprintf(contentFile, "index.md")), 0o755), qt.IsNil)
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "index.nn.md"), []byte(fmt.Sprintf(contentFile, "index.nn.md")), 0o755), qt.IsNil)
-
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "pages", "bio.md"), []byte(fmt.Sprintf(contentFile, "bio.md")), 0o755), qt.IsNil)
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "resources", "hugo1.json"), []byte(`hugo1: {{ printf "no template handling in here" }}`), 0o755), qt.IsNil)
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "resources", "hugo2.xml"), []byte(`hugo2: {{ printf "no template handling in here" }}`), 0o755), qt.IsNil)
-
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeThemeDir, "index.md"), []byte(fmt.Sprintf(contentFile, "index.md")), 0o755), qt.IsNil)
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeThemeDir, "resources", "hugo1.json"), []byte(`hugo1: {{ printf "no template handling in here" }}`), 0o755), qt.IsNil)
-
-	c.Assert(initFs(mm), qt.IsNil)
-	cfg, fs := newTestCfg(c, mm)
-	conf := testconfig.GetTestConfigs(fs.Source, cfg)
-	h, err := hugolib.NewHugoSites(deps.DepsCfg{Configs: conf, Fs: fs})
-	c.Assert(err, qt.IsNil)
-	c.Assert(len(h.Sites), qt.Equals, 2)
-
-	c.Assert(create.NewContent(h, "my-bundle", "post/my-post", false), qt.IsNil)
-
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-post/resources/hugo1.json")), `hugo1: {{ printf "no template handling in here" }}`)
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-post/resources/hugo2.xml")), `hugo2: {{ printf "no template handling in here" }}`)
-
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-post/index.md")), `File: index.md`, `Name: My Post`, `i18n: Hugo Rocks!`)
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-post/index.nn.md")), `File: index.nn.md`, `Name: My Post`, `i18n: Hugo Rokkar!`)
-
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-post/pages/bio.md")), `File: bio.md`, `Name: Bio`)
-
-	c.Assert(create.NewContent(h, "my-theme-bundle", "post/my-theme-post", false), qt.IsNil)
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-theme-post/index.md")), `File: index.md`, `Name: My Theme Post`, `i18n: Hugo Rocks!`)
-	cContains(c, readFileFromFs(t, fs.Source, filepath.Join("content", "post/my-theme-post/resources/hugo1.json")), `hugo1: {{ printf "no template handling in here" }}`)
-}
-
-func TestNewContentForce(t *testing.T) {
-	mm := afero.NewMemMapFs()
-	c := qt.New(t)
-
-	archetypeDir := filepath.Join("archetypes", "my-bundle")
-	c.Assert(mm.MkdirAll(archetypeDir, 0o755), qt.IsNil)
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "index.md"), []byte(""), 0o755), qt.IsNil)
-	c.Assert(afero.WriteFile(mm, filepath.Join(archetypeDir, "index.nn.md"), []byte(""), 0o755), qt.IsNil)
-
-	c.Assert(initFs(mm), qt.IsNil)
-	cfg, fs := newTestCfg(c, mm)
-
-	conf := testconfig.GetTestConfigs(fs.Source, cfg)
-	h, err := hugolib.NewHugoSites(deps.DepsCfg{Configs: conf, Fs: fs})
-	c.Assert(err, qt.IsNil)
-	c.Assert(len(h.Sites), qt.Equals, 2)
-
-	// from file
-	c.Assert(create.NewContent(h, "post", "post/my-post.md", false), qt.IsNil)
-	c.Assert(create.NewContent(h, "post", "post/my-post.md", false), qt.IsNotNil)
-	c.Assert(create.NewContent(h, "post", "post/my-post.md", true), qt.IsNil)
-
-	// from dir
-	c.Assert(create.NewContent(h, "my-bundle", "post/my-post", false), qt.IsNil)
-	c.Assert(create.NewContent(h, "my-bundle", "post/my-post", false), qt.IsNotNil)
-	c.Assert(create.NewContent(h, "my-bundle", "post/my-post", true), qt.IsNil)
 }
 
 func initFs(fs afero.Fs) error {
@@ -308,7 +179,7 @@ func initFs(fs afero.Fs) error {
 		afero.WriteFile(fs, filename, []byte(`---
 title: Test
 ---
-`), 0666)
+`), 0o666)
 	}
 
 	// create archetype files

create/skeletons/skeletons.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -83,7 +83,7 @@ func copyFiles(createpath string, sourceFs afero.Fs, skeleton embed.FS) error {
 	return fs.WalkDir(skeleton, ".", func(path string, d fs.DirEntry, err error) error {
 		_, slug, _ := strings.Cut(path, "/")
 		if d.IsDir() {
-			return sourceFs.MkdirAll(filepath.Join(createpath, slug), 0777)
+			return sourceFs.MkdirAll(filepath.Join(createpath, slug), 0o777)
 		} else {
 			if filepath.Base(path) != ".gitkeep" {
 				data, _ := fs.ReadFile(skeleton, path)

deploy/deploy.go

@@ -22,6 +22,7 @@ import (
 	"context"
 	"crypto/md5"
 	"encoding/hex"
+	"errors"
 	"fmt"
 	"io"
 	"mime"
@@ -33,8 +34,6 @@ import (
 	"strings"
 	"sync"
 
-	"errors"
-
 	"github.com/dustin/go-humanize"
 	"github.com/gobwas/glob"
 	"github.com/gohugoio/hugo/common/loggers"
@@ -75,7 +74,6 @@ const metaMD5Hash = "md5chksum" // the meta key to store md5hash in
 
 // New constructs a new *Deployer.
 func New(cfg config.AllProvider, logger loggers.Logger, localFs afero.Fs) (*Deployer, error) {
-
 	dcfg := cfg.GetConfigSection(deploymentConfigKey).(DeployConfig)
 	targetName := dcfg.Target
 
@@ -675,8 +673,6 @@ func (d *Deployer) findDiffs(localFiles map[string]*localFile, remoteFiles map[s
 			} else if !bytes.Equal(lf.MD5(), remoteFile.MD5) {
 				upload = true
 				reason = reasonMD5Differs
-			} else {
-				// Nope! Leave uploaded = false.
 			}
 			found[path] = true
 		} else {

deploy/deploy_test.go

@@ -31,6 +31,7 @@ import (
 	"testing"
 
 	"github.com/gohugoio/hugo/common/loggers"
+	"github.com/gohugoio/hugo/hugofs"
 	"github.com/gohugoio/hugo/media"
 	"github.com/google/go-cmp/cmp"
 	"github.com/google/go-cmp/cmp/cmpopts"
@@ -241,7 +242,7 @@ func TestWalkLocal(t *testing.T) {
 			for _, name := range tc.Given {
 				dir, _ := path.Split(name)
 				if dir != "" {
-					if err := fs.MkdirAll(dir, 0755); err != nil {
+					if err := fs.MkdirAll(dir, 0o755); err != nil {
 						t.Fatal(err)
 					}
 				}
@@ -530,7 +531,7 @@ func initFsTests(t *testing.T) []*fsTest {
 	membucket := memblob.OpenBucket(nil)
 	t.Cleanup(func() { membucket.Close() })
 
-	filefs := afero.NewBasePathFs(afero.NewOsFs(), tmpfsdir)
+	filefs := hugofs.NewBasePathFs(afero.NewOsFs(), tmpfsdir)
 	filebucket, err := fileblob.OpenBucket(tmpbucketdir, nil)
 	if err != nil {
 		t.Fatal(err)

deps/deps.go

@@ -11,6 +11,8 @@ import (
 	"sync/atomic"
 
 	"github.com/bep/logg"
+	"github.com/gohugoio/hugo/cache/dynacache"
+	"github.com/gohugoio/hugo/cache/filecache"
 	"github.com/gohugoio/hugo/common/hexec"
 	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/config"
@@ -59,6 +61,9 @@ type Deps struct {
 	// The configuration to use
 	Conf config.AllProvider `json:"-"`
 
+	// The memory cache to use.
+	MemCache *dynacache.Cache
+
 	// The translation func to use
 	Translate func(ctx context.Context, translationID string, templateData any) string `json:"-"`
 
@@ -149,6 +154,10 @@ func (d *Deps) Init() error {
 		d.ExecHelper = hexec.New(d.Conf.GetConfigSection("security").(security.Config))
 	}
 
+	if d.MemCache == nil {
+		d.MemCache = dynacache.New(dynacache.Options{Running: d.Conf.Running(), Log: d.Log})
+	}
+
 	if d.PathSpec == nil {
 		hashBytesReceiverFunc := func(name string, match bool) {
 			if !match {
@@ -190,13 +199,16 @@ func (d *Deps) Init() error {
 	}
 
 	var common *resources.SpecCommon
-	var imageCache *resources.ImageCache
 	if d.ResourceSpec != nil {
 		common = d.ResourceSpec.SpecCommon
-		imageCache = d.ResourceSpec.ImageCache
 	}
 
-	resourceSpec, err := resources.NewSpec(d.PathSpec, common, imageCache, d.BuildState, d.Log, d, d.ExecHelper)
+	fileCaches, err := filecache.NewCaches(d.PathSpec)
+	if err != nil {
+		return fmt.Errorf("failed to create file caches from configuration: %w", err)
+	}
+
+	resourceSpec, err := resources.NewSpec(d.PathSpec, common, fileCaches, d.MemCache, d.BuildState, d.Log, d, d.ExecHelper)
 	if err != nil {
 		return fmt.Errorf("failed to create resource spec: %w", err)
 	}
@@ -307,6 +319,9 @@ func (d *Deps) TextTmpl() tpl.TemplateParseFinder {
 }
 
 func (d *Deps) Close() error {
+	if d.MemCache != nil {
+		d.MemCache.Stop()
+	}
 	return d.BuildClosers.Close()
 }
 

go.mod

@@ -2,9 +2,8 @@ module github.com/gohugoio/hugo
 
 require (
 	github.com/BurntSushi/locker v0.0.0-20171006230638-a6e239ea1c69
-	github.com/PuerkitoBio/purell v1.1.1
 	github.com/alecthomas/chroma/v2 v2.12.0
-	github.com/armon/go-radix v1.0.0
+	github.com/armon/go-radix v1.0.1-0.20221118154546-54df44f2176c
 	github.com/aws/aws-sdk-go v1.48.6
 	github.com/bep/clocks v0.5.0
 	github.com/bep/debounce v1.2.0
@@ -15,10 +14,10 @@ require (
 	github.com/bep/golibsass v1.1.1
 	github.com/bep/gowebp v0.3.0
 	github.com/bep/helpers v0.4.0
-	github.com/bep/lazycache v0.2.0
+	github.com/bep/lazycache v0.4.0
 	github.com/bep/logg v0.4.0
 	github.com/bep/mclib v1.20400.20402
-	github.com/bep/overlayfs v0.6.0
+	github.com/bep/overlayfs v0.9.1
 	github.com/bep/simplecobra v0.4.0
 	github.com/bep/tmc v0.5.1
 	github.com/clbanning/mxj/v2 v2.7.0
@@ -53,6 +52,7 @@ require (
 	github.com/muesli/smartcrop v0.3.0
 	github.com/niklasfasching/go-org v1.7.0
 	github.com/olekukonko/tablewriter v0.0.5
+	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58
 	github.com/pelletier/go-toml/v2 v2.1.1
 	github.com/rogpeppe/go-internal v1.12.0
 	github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd
@@ -60,17 +60,17 @@ require (
 	github.com/spf13/afero v1.11.0
 	github.com/spf13/cast v1.6.0
 	github.com/spf13/cobra v1.8.0
-	github.com/spf13/fsync v0.9.0
+	github.com/spf13/fsync v0.10.0
 	github.com/spf13/pflag v1.0.5
 	github.com/tdewolff/minify/v2 v2.20.13
 	github.com/tdewolff/parse/v2 v2.7.8
 	github.com/yuin/goldmark v1.6.0
 	github.com/yuin/goldmark-emoji v1.0.2
-	go.uber.org/atomic v1.11.0
 	go.uber.org/automaxprocs v1.5.3
 	gocloud.dev v0.34.0
 	golang.org/x/exp v0.0.0-20221031165847-c99f073a8326
 	golang.org/x/image v0.14.0
+	golang.org/x/mod v0.14.0
 	golang.org/x/net v0.20.0
 	golang.org/x/sync v0.6.0
 	golang.org/x/text v0.14.0
@@ -92,7 +92,6 @@ require (
 	github.com/Azure/go-autorest v14.2.0+incompatible // indirect
 	github.com/Azure/go-autorest/autorest/to v0.4.0 // indirect
 	github.com/AzureAD/microsoft-authentication-library-for-go v1.0.0 // indirect
-	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
 	github.com/aws/aws-sdk-go-v2 v1.20.0 // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.4.11 // indirect
 	github.com/aws/aws-sdk-go-v2/config v1.18.32 // indirect
@@ -124,7 +123,7 @@ require (
 	github.com/google/wire v0.5.0 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.3.2 // indirect
 	github.com/googleapis/gax-go/v2 v2.12.0 // indirect
-	github.com/hashicorp/golang-lru/v2 v2.0.1 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/invopop/yaml v0.2.0 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
@@ -142,7 +141,6 @@ require (
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	go.opencensus.io v0.24.0 // indirect
 	golang.org/x/crypto v0.18.0 // indirect
-	golang.org/x/mod v0.14.0 // indirect
 	golang.org/x/oauth2 v0.15.0 // indirect
 	golang.org/x/sys v0.16.0 // indirect
 	golang.org/x/time v0.5.0 // indirect
@@ -158,4 +156,4 @@ require (
 	software.sslmate.com/src/go-pkcs12 v0.2.0 // indirect
 )
 
-go 1.18
+go 1.20

go.sum

@@ -1,14 +1,51 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.44.3/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
+cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
+cloud.google.com/go v0.75.0/go.mod h1:VGuuCn7PG0dwsd5XPVm2Mm3wlh3EL55/79EKB6hlPTY=
 cloud.google.com/go v0.110.10 h1:LXy9GEO+timppncPIAZoOj3l58LIU9k+kn48AN7IO3Y=
 cloud.google.com/go v0.110.10/go.mod h1:v1OoFqYxiBkUrruItNM3eT4lLByNjxmJSV/xDKJNnic=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
 cloud.google.com/go/compute v1.23.3 h1:6sVlXXBmbd7jNX0Ipq0trII3e4n1/MsADLK6a+aiVlk=
 cloud.google.com/go/compute v1.23.3/go.mod h1:VCgBUoMnIVIR0CscqQiPJLAG25E3ZRZMzcFZeQ+h8CI=
 cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGBW5aJ7UnBMY=
 cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
 cloud.google.com/go/iam v1.1.5 h1:1jTsCu4bcsNsE4iiqNT5SHwrDRCfRmIaaaVFhRveTJI=
 cloud.google.com/go/iam v1.1.5/go.mod h1:rB6P/Ic3mykPbFio+vo7403drjlgvoWfYpJhMXEbzv8=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
+cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
+cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
+cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
+cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
+cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3fOKtUw0Xmo=
 cloud.google.com/go/storage v1.35.1 h1:B59ahL//eDfx2IIKFBeT5Atm9wnNmj3+8xG/W4WB//w=
 cloud.google.com/go/storage v1.35.1/go.mod h1:M6M/3V/D3KpzMTJyPOR/HU6n2Si5QdaXYEsng2xgOs8=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/Azure/azure-sdk-for-go/sdk/azcore v1.7.0 h1:8q4SaHjFsClSvuVne0ID/5Ka8u3fcIHyqkLjcFpNRHQ=
 github.com/Azure/azure-sdk-for-go/sdk/azcore v1.7.0/go.mod h1:bjGvMhVMb+EEm3VRNQawDMUyMMjo+S5ewNjflkep/0Q=
 github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.3.0 h1:vcYCAze6p19qBW7MhZybIsqD8sMV8js0NyQM8JDnVtg=
@@ -28,16 +65,13 @@ github.com/BurntSushi/locker v0.0.0-20171006230638-a6e239ea1c69 h1:+tu3HOoMXB7RX
 github.com/BurntSushi/locker v0.0.0-20171006230638-a6e239ea1c69/go.mod h1:L1AbZdiDllfyYH5l5OkAaZtk7VkWe89bPJFmnDBNHxg=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/PuerkitoBio/purell v1.1.1 h1:WEQqlqaGbrPkxLJWfBwQmfEAE1Z7ONdDLqrN38tNFfI=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
-github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 h1:d+Bc7a5rLufV/sSk/8dngufqelfh6jnri85riMAaF/M=
-github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 github.com/alecthomas/assert/v2 v2.2.1 h1:XivOgYcduV98QCahG8T5XTezV5bylXe+lBxLG2K2ink=
 github.com/alecthomas/chroma/v2 v2.12.0 h1:Wh8qLEgMMsN7mgyG8/qIpegky2Hvzr4By6gEF7cmWgw=
 github.com/alecthomas/chroma/v2 v2.12.0/go.mod h1:4TQu7gdfuPjSh76j78ietmqh9LiurGF0EpseFXdKMBw=
 github.com/alecthomas/repr v0.2.0 h1:HAzS41CIzNW5syS8Mf9UwXhNH1J9aix/BvDRf1Ml2Yk=
-github.com/armon/go-radix v1.0.0 h1:F4z6KzEeeQIMeLFa97iZU6vupzoecKdU5TX24SNppXI=
+github.com/armon/go-radix v1.0.1-0.20221118154546-54df44f2176c h1:651/eoCRnQ7YtSjAnSzRucrJz+3iGEFt+ysraELS81M=
-github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
+github.com/armon/go-radix v1.0.1-0.20221118154546-54df44f2176c/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/aws/aws-sdk-go v1.48.6 h1:hnL/TE3eRigirDLrdRE9AWE1ALZSVLAsC4wK8TGsMqk=
 github.com/aws/aws-sdk-go v1.48.6/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
 github.com/aws/aws-sdk-go-v2 v1.20.0 h1:INUDpYLt4oiPOJl0XwZDK2OVAVf0Rzo+MGVTv9f+gy8=
@@ -96,14 +130,14 @@ github.com/bep/gowebp v0.3.0 h1:MhmMrcf88pUY7/PsEhMgEP0T6fDUnRTMpN8OclDrbrY=
 github.com/bep/gowebp v0.3.0/go.mod h1:ZhFodwdiFp8ehGJpF4LdPl6unxZm9lLFjxD3z2h2AgI=
 github.com/bep/helpers v0.4.0 h1:ab9veaAiWY4ST48Oxp5usaqivDmYdB744fz+tcZ3Ifs=
 github.com/bep/helpers v0.4.0/go.mod h1:/QpHdmcPagDw7+RjkLFCvnlUc8lQ5kg4KDrEkb2Yyco=
-github.com/bep/lazycache v0.2.0 h1:HKrlZTrDxHIrNKqmnurH42ryxkngCMYLfBpyu40VcwY=
+github.com/bep/lazycache v0.4.0 h1:X8yVyWNVupPd4e1jV7efi3zb7ZV/qcjKQgIQ5aPbkYI=
-github.com/bep/lazycache v0.2.0/go.mod h1:xUIsoRD824Vx0Q/n57+ZO7kmbEhMBOnTjM/iPixNGbg=
+github.com/bep/lazycache v0.4.0/go.mod h1:NmRm7Dexh3pmR1EignYR8PjO2cWybFQ68+QgY3VMCSc=
 github.com/bep/logg v0.4.0 h1:luAo5mO4ZkhA5M1iDVDqDqnBBnlHjmtZF6VAyTp+nCQ=
 github.com/bep/logg v0.4.0/go.mod h1:Ccp9yP3wbR1mm++Kpxet91hAZBEQgmWgFgnXX3GkIV0=
 github.com/bep/mclib v1.20400.20402 h1:olpCE2WSPpOAbFE1R4hnftSEmQ34+xzy2HRzd0m69rA=
 github.com/bep/mclib v1.20400.20402/go.mod h1:pkrk9Kyfqg34Uj6XlDq9tdEFJBiL1FvCoCgVKRzw1EY=
-github.com/bep/overlayfs v0.6.0 h1:sgLcq/qtIzbaQNl2TldGXOkHvqeZB025sPvHOQL+DYo=
+github.com/bep/overlayfs v0.9.1 h1:SL54SV8A3zRkmQ+83Jj4TLE88jadHd5d1L4NpfmqJJs=
-github.com/bep/overlayfs v0.6.0/go.mod h1:NFjSmn3kCqG7KX2Lmz8qT8VhPPCwZap3UNogXawoQHM=
+github.com/bep/overlayfs v0.9.1/go.mod h1:aYY9W7aXQsGcA7V9x/pzeR8LjEgIxbtisZm8Q7zPz40=
 github.com/bep/simplecobra v0.4.0 h1:ufX/6WcOtEVJdCd7hsztTWURlZkOaWYOD+zCqrM8qUE=
 github.com/bep/simplecobra v0.4.0/go.mod h1:evSM6iQqRwqpV7W4H4DlYFfe9mZ0x6Hj5GEOnIV7dI4=
 github.com/bep/tmc v0.5.1 h1:CsQnSC6MsomH64gw0cT5f+EwQDcvZz4AazKunFwTpuI=
@@ -111,6 +145,9 @@ github.com/bep/tmc v0.5.1/go.mod h1:tGYHN8fS85aJPhDLgXETVKp+PR382OvFi2+q2GkGsq0=
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@@ -118,6 +155,8 @@ github.com/cli/safeexec v1.0.1 h1:e/C79PbXF4yYTN/wauC4tviMxEV13BwljGj0N9j+N00=
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@@ -135,6 +174,8 @@ github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+m
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@@ -154,6 +195,9 @@ github.com/getkin/kin-openapi v0.122.0 h1:WB9Jbl0Hp/T79/JF9xlSW5Kl9uYdk/AWD0yAd9
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@@ -177,29 +221,47 @@ github.com/gohugoio/testmodBuilder/mods v0.0.0-20190520184928-c56af20f2e95/go.mo
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@@ -208,7 +270,22 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
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@@ -219,15 +296,22 @@ github.com/google/wire v0.5.0 h1:I7ELFeVBr3yfPIcc8+MWvrjk+3VjbcSzoXm3JVa+jD8=
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@@ -241,6 +325,10 @@ github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGw
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@@ -283,6 +371,8 @@ github.com/niklasfasching/go-org v1.7.0 h1:vyMdcMWWTe/XmANk19F4k8XGBYg0GQ/gJGMim
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@@ -292,11 +382,13 @@ github.com/pkg/browser v0.0.0-20210911075715-681adbf594b8/go.mod h1:HKlIX3XHQyzL
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@@ -308,21 +400,25 @@ github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd/go.mod h1:hPqNNc0
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@@ -335,66 +431,174 @@ github.com/tdewolff/parse/v2 v2.7.8/go.mod h1:3FbJWZp3XT9OWVN3Hmfp0p/a08v4h8J9W1
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+google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
+google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201109203340-2640f1f9cdfb/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201201144952-b05cb90ed32e/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201210142538-e3217bee35cc/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201214200347-8c77b98c765d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20210108203827-ffc7fda8c3d7/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20210226172003-ab064af71705/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20231106174013-bbf56f31fb17 h1:wpZ8pe2x1Q3f2KyT5f8oP/fa9rHAKgFPr/HZdNuS+PQ=
 google.golang.org/genproto v0.0.0-20231106174013-bbf56f31fb17/go.mod h1:J7XzRzVy1+IPwWHZUzoD0IccYZIrXILAQpc+Qy9CMhY=
 google.golang.org/genproto/googleapis/api v0.0.0-20231106174013-bbf56f31fb17 h1:JpwMPBpFN3uKhdaekDpiNlImDdkUAyiJ6ez/uxGaUSo=
@@ -444,10 +751,21 @@ google.golang.org/genproto/googleapis/api v0.0.0-20231106174013-bbf56f31fb17/go.
 google.golang.org/genproto/googleapis/rpc v0.0.0-20231120223509-83a465c0220f h1:ultW7fxlIvee4HYrtnaRPon9HpEgFk5zYpmfMgtKB5I=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20231120223509-83a465c0220f/go.mod h1:L9KNLi232K1/xB6f7AlSX692koaRnKaWSR0stBki0Yc=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
+google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
+google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
+google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
+google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/grpc v1.31.1/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
 google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
+google.golang.org/grpc v1.34.0/go.mod h1:WotjhfgOW/POjDeRt8vscBtXq+2VjORFy659qA51WJ8=
+google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/grpc v1.59.0 h1:Z5Iec2pjwb+LEOqzpB2MR12/eKFhDPhuqW91O+4bwUk=
 google.golang.org/grpc v1.59.0/go.mod h1:aUPDwccQo6OTjy7Hct4AfBPD1GptF4fyUjIkQ9YtF98=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
@@ -458,6 +776,7 @@ google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzi
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
@@ -480,8 +799,16 @@ gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 howett.net/plist v1.0.0 h1:7CrbWYbPPO/PyNy38b2EB/+gYbjCe2DXBxgtOOZbSQM=
 howett.net/plist v1.0.0/go.mod h1:lqaXoTrLY4hg8tnEzNru53gicrbv7rrk+2xJA/7hw9g=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
 software.sslmate.com/src/go-pkcs12 v0.2.0 h1:nlFkj7bTysH6VkC4fGphtjXRbezREPgrHuJG20hBGPE=
 software.sslmate.com/src/go-pkcs12 v0.2.0/go.mod h1:23rNcYsMabIc1otwLpTkCCPwUq6kQsTyowttG/as0kQ=

helpers/content.go

@@ -30,7 +30,6 @@ import (
 	"github.com/spf13/afero"
 
 	"github.com/gohugoio/hugo/markup/converter"
-	"github.com/gohugoio/hugo/markup/converter/hooks"
 
 	"github.com/gohugoio/hugo/markup"
 
@@ -38,19 +37,15 @@ import (
 )
 
 var (
-	openingPTag        = []byte("<p>")
+	openingPTag = []byte("<p>")
-	closingPTag        = []byte("</p>")
+	closingPTag = []byte("</p>")
-	paragraphIndicator = []byte("<p")
-	closingIndicator   = []byte("</")
 )
 
 // ContentSpec provides functionality to render markdown content.
 type ContentSpec struct {
 	Converters          markup.ConverterProvider
 	anchorNameSanitizer converter.AnchorNameSanitizer
-	getRenderer         func(t hooks.RendererType, id any) any
+	Cfg                 config.AllProvider
-
-	Cfg config.AllProvider
 }
 
 // NewContentSpec returns a ContentSpec initialized

helpers/content_test.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -24,8 +24,6 @@ import (
 	"github.com/gohugoio/hugo/helpers"
 )
 
-const tstHTMLContent = "<!DOCTYPE html><html><head><script src=\"http://two/foobar.js\"></script></head><body><nav><ul><li hugo-nav=\"section_0\"></li><li hugo-nav=\"section_1\"></li></ul></nav><article>content <a href=\"http://two/foobar\">foobar</a>. Follow up</article><p>This is some text.<br>And some more.</p></body></html>"
-
 func TestTrimShortHTML(t *testing.T) {
 	tests := []struct {
 		input, output []byte
@@ -68,7 +66,6 @@ func BenchmarkTestTruncateWordsToWholeSentence(b *testing.B) {
 }
 
 func TestTruncateWordsToWholeSentence(t *testing.T) {
-
 	type test struct {
 		input, expected string
 		max             int
@@ -101,7 +98,6 @@ func TestTruncateWordsToWholeSentence(t *testing.T) {
 }
 
 func TestTruncateWordsByRune(t *testing.T) {
-
 	type test struct {
 		input, expected string
 		max             int

helpers/general.go

@@ -196,6 +196,7 @@ func ReaderContains(r io.Reader, subslice []byte) bool {
 func GetTitleFunc(style string) func(s string) string {
 	switch strings.ToLower(style) {
 	case "go":
+		//lint:ignore SA1019 keep for now.
 		return strings.Title
 	case "chicago":
 		tc := transform.NewTitleConverter(transform.ChicagoStyle)
@@ -263,10 +264,11 @@ func MD5String(f string) string {
 	return hex.EncodeToString(h.Sum([]byte{}))
 }
 
-// MD5FromFileFast creates a MD5 hash from the given file. It only reads parts of
+// MD5FromReaderFast creates a MD5 hash from the given file. It only reads parts of
 // the file for speed, so don't use it if the files are very subtly different.
 // It will not close the file.
-func MD5FromFileFast(r io.ReadSeeker) (string, error) {
+// It will return the MD5 hash and the size of r in bytes.
+func MD5FromReaderFast(r io.ReadSeeker) (string, int64, error) {
 	const (
 		// Do not change once set in stone!
 		maxChunks = 8
@@ -284,7 +286,7 @@ func MD5FromFileFast(r io.ReadSeeker) (string, error) {
 				if err == io.EOF {
 					break
 				}
-				return "", err
+				return "", 0, err
 			}
 		}
 
@@ -294,12 +296,14 @@ func MD5FromFileFast(r io.ReadSeeker) (string, error) {
 				h.Write(buff)
 				break
 			}
-			return "", err
+			return "", 0, err
 		}
 		h.Write(buff)
 	}
 
-	return hex.EncodeToString(h.Sum(nil)), nil
+	size, _ := r.Seek(0, io.SeekEnd)
+
+	return hex.EncodeToString(h.Sum(nil)), size, nil
 }
 
 // MD5FromReader creates a MD5 hash from the given reader.
@@ -328,3 +332,21 @@ func PrintFs(fs afero.Fs, path string, w io.Writer) {
 		return nil
 	})
 }
+
+// FormatByteCount pretty formats b.
+func FormatByteCount(bc uint64) string {
+	const (
+		Gigabyte = 1 << 30
+		Megabyte = 1 << 20
+		Kilobyte = 1 << 10
+	)
+	switch {
+	case bc > Gigabyte || -bc > Gigabyte:
+		return fmt.Sprintf("%.2f GB", float64(bc)/Gigabyte)
+	case bc > Megabyte || -bc > Megabyte:
+		return fmt.Sprintf("%.2f MB", float64(bc)/Megabyte)
+	case bc > Kilobyte || -bc > Kilobyte:
+		return fmt.Sprintf("%.2f KB", float64(bc)/Kilobyte)
+	}
+	return fmt.Sprintf("%d B", bc)
+}

helpers/general_test.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -259,19 +259,19 @@ func TestUniqueStringsSorted(t *testing.T) {
 func TestFastMD5FromFile(t *testing.T) {
 	fs := afero.NewMemMapFs()
 
-	if err := afero.WriteFile(fs, "small.txt", []byte("abc"), 0777); err != nil {
+	if err := afero.WriteFile(fs, "small.txt", []byte("abc"), 0o777); err != nil {
 		t.Fatal(err)
 	}
 
-	if err := afero.WriteFile(fs, "small2.txt", []byte("abd"), 0777); err != nil {
+	if err := afero.WriteFile(fs, "small2.txt", []byte("abd"), 0o777); err != nil {
 		t.Fatal(err)
 	}
 
-	if err := afero.WriteFile(fs, "bigger.txt", []byte(strings.Repeat("a bc d e", 100)), 0777); err != nil {
+	if err := afero.WriteFile(fs, "bigger.txt", []byte(strings.Repeat("a bc d e", 100)), 0o777); err != nil {
 		t.Fatal(err)
 	}
 
-	if err := afero.WriteFile(fs, "bigger2.txt", []byte(strings.Repeat("c d e f g", 100)), 0777); err != nil {
+	if err := afero.WriteFile(fs, "bigger2.txt", []byte(strings.Repeat("c d e f g", 100)), 0o777); err != nil {
 		t.Fatal(err)
 	}
 
@@ -292,19 +292,19 @@ func TestFastMD5FromFile(t *testing.T) {
 	defer bf1.Close()
 	defer bf2.Close()
 
-	m1, err := helpers.MD5FromFileFast(sf1)
+	m1, _, err := helpers.MD5FromReaderFast(sf1)
 	c.Assert(err, qt.IsNil)
 	c.Assert(m1, qt.Equals, "e9c8989b64b71a88b4efb66ad05eea96")
 
-	m2, err := helpers.MD5FromFileFast(sf2)
+	m2, _, err := helpers.MD5FromReaderFast(sf2)
 	c.Assert(err, qt.IsNil)
 	c.Assert(m2, qt.Not(qt.Equals), m1)
 
-	m3, err := helpers.MD5FromFileFast(bf1)
+	m3, _, err := helpers.MD5FromReaderFast(bf1)
 	c.Assert(err, qt.IsNil)
 	c.Assert(m3, qt.Not(qt.Equals), m2)
 
-	m4, err := helpers.MD5FromFileFast(bf2)
+	m4, _, err := helpers.MD5FromReaderFast(bf2)
 	c.Assert(err, qt.IsNil)
 	c.Assert(m4, qt.Not(qt.Equals), m3)
 
@@ -320,7 +320,7 @@ func BenchmarkMD5FromFileFast(b *testing.B) {
 		b.Run(fmt.Sprintf("full=%t", full), func(b *testing.B) {
 			for i := 0; i < b.N; i++ {
 				b.StopTimer()
-				if err := afero.WriteFile(fs, "file.txt", []byte(strings.Repeat("1234567890", 2000)), 0777); err != nil {
+				if err := afero.WriteFile(fs, "file.txt", []byte(strings.Repeat("1234567890", 2000)), 0o777); err != nil {
 					b.Fatal(err)
 				}
 				f, err := fs.Open("file.txt")
@@ -333,7 +333,7 @@ func BenchmarkMD5FromFileFast(b *testing.B) {
 						b.Fatal(err)
 					}
 				} else {
-					if _, err := helpers.MD5FromFileFast(f); err != nil {
+					if _, _, err := helpers.MD5FromReaderFast(f); err != nil {
 						b.Fatal(err)
 					}
 				}
@@ -350,7 +350,7 @@ func BenchmarkUniqueStrings(b *testing.B) {
 		for i := 0; i < b.N; i++ {
 			result := helpers.UniqueStrings(input)
 			if len(result) != 6 {
-				b.Fatal(fmt.Sprintf("invalid count: %d", len(result)))
+				b.Fatalf("invalid count: %d", len(result))
 			}
 		}
 	})
@@ -369,7 +369,7 @@ func BenchmarkUniqueStrings(b *testing.B) {
 
 			result := helpers.UniqueStringsReuse(inputc)
 			if len(result) != 6 {
-				b.Fatal(fmt.Sprintf("invalid count: %d", len(result)))
+				b.Fatalf("invalid count: %d", len(result))
 			}
 		}
 	})
@@ -388,7 +388,7 @@ func BenchmarkUniqueStrings(b *testing.B) {
 
 			result := helpers.UniqueStringsSorted(inputc)
 			if len(result) != 6 {
-				b.Fatal(fmt.Sprintf("invalid count: %d", len(result)))
+				b.Fatalf("invalid count: %d", len(result))
 			}
 		}
 	})

helpers/path.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -23,12 +23,12 @@ import (
 	"regexp"
 	"sort"
 	"strings"
-	"unicode"
 
 	"github.com/gohugoio/hugo/common/herrors"
 	"github.com/gohugoio/hugo/common/text"
 	"github.com/gohugoio/hugo/htesting"
 
+	"github.com/gohugoio/hugo/common/paths"
 	"github.com/gohugoio/hugo/hugofs"
 
 	"github.com/gohugoio/hugo/common/hugio"
@@ -41,7 +41,11 @@ import (
 // whilst preserving the original casing of the string.
 // E.g. Social Media -> Social-Media
 func (p *PathSpec) MakePath(s string) string {
-	return p.UnicodeSanitize(s)
+	s = paths.Sanitize(s)
+	if p.Cfg.RemovePathAccents() {
+		s = text.RemoveAccentsString(s)
+	}
+	return s
 }
 
 // MakePathsSanitized applies MakePathSanitized on every item in the slice
@@ -59,74 +63,13 @@ func (p *PathSpec) MakePathSanitized(s string) string {
 	return strings.ToLower(p.MakePath(s))
 }
 
-// ToSlashTrimLeading is just a filepath.ToSlaas with an added / prefix trimmer.
-func ToSlashTrimLeading(s string) string {
-	return strings.TrimPrefix(filepath.ToSlash(s), "/")
-}
-
 // MakeTitle converts the path given to a suitable title, trimming whitespace
 // and replacing hyphens with whitespace.
 func MakeTitle(inpath string) string {
 	return strings.Replace(strings.TrimSpace(inpath), "-", " ", -1)
 }
 
-// From https://golang.org/src/net/url/url.go
+// MakeTitleInPath converts the path given to a suitable title, trimming whitespace
-func ishex(c rune) bool {
-	switch {
-	case '0' <= c && c <= '9':
-		return true
-	case 'a' <= c && c <= 'f':
-		return true
-	case 'A' <= c && c <= 'F':
-		return true
-	}
-	return false
-}
-
-// UnicodeSanitize sanitizes string to be used in Hugo URL's, allowing only
-// a predefined set of special Unicode characters.
-// If RemovePathAccents configuration flag is enabled, Unicode accents
-// are also removed.
-// Hyphens in the original input are maintained.
-// Spaces will be replaced with a single hyphen, and sequential replacement hyphens will be reduced to one.
-func (p *PathSpec) UnicodeSanitize(s string) string {
-	if p.Cfg.RemovePathAccents() {
-		s = text.RemoveAccentsString(s)
-	}
-
-	source := []rune(s)
-	target := make([]rune, 0, len(source))
-	var (
-		prependHyphen bool
-		wasHyphen     bool
-	)
-
-	for i, r := range source {
-		isAllowed := r == '.' || r == '/' || r == '\\' || r == '_' || r == '#' || r == '+' || r == '~' || r == '-' || r == '@'
-		isAllowed = isAllowed || unicode.IsLetter(r) || unicode.IsDigit(r) || unicode.IsMark(r)
-		isAllowed = isAllowed || (r == '%' && i+2 < len(source) && ishex(source[i+1]) && ishex(source[i+2]))
-
-		if isAllowed {
-			// track explicit hyphen in input; no need to add a new hyphen if
-			// we just saw one.
-			wasHyphen = r == '-'
-
-			if prependHyphen {
-				// if currently have a hyphen, don't prepend an extra one
-				if !wasHyphen {
-					target = append(target, '-')
-				}
-				prependHyphen = false
-			}
-			target = append(target, r)
-		} else if len(target) > 0 && !wasHyphen && unicode.IsSpace(r) {
-			prependHyphen = true
-		}
-	}
-
-	return string(target)
-}
-
 func MakePathRelative(inPath string, possibleDirectories ...string) (string, error) {
 	for _, currentPath := range possibleDirectories {
 		if strings.HasPrefix(inPath, currentPath) {
@@ -317,13 +260,12 @@ func FindCWD() (string, error) {
 	return path, nil
 }
 
-// SymbolicWalk is like filepath.Walk, but it follows symbolic links.
+// Walk walks the file tree rooted at root, calling walkFn for each file or
-func SymbolicWalk(fs afero.Fs, root string, walker hugofs.WalkFunc) error {
+// directory in the tree, including root.
+func Walk(fs afero.Fs, root string, walker hugofs.WalkFunc) error {
 	if _, isOs := fs.(*afero.OsFs); isOs {
-		// Mainly to track symlinks.
 		fs = hugofs.NewBaseFileDecorator(fs)
 	}
-
 	w := hugofs.NewWalkway(hugofs.WalkwayConfig{
 		Fs:     fs,
 		Root:   root,
@@ -333,16 +275,6 @@ func SymbolicWalk(fs afero.Fs, root string, walker hugofs.WalkFunc) error {
 	return w.Walk()
 }
 
-// LstatIfPossible can be used to call Lstat if possible, else Stat.
-func LstatIfPossible(fs afero.Fs, path string) (os.FileInfo, error) {
-	if lstater, ok := fs.(afero.Lstater); ok {
-		fi, _, err := lstater.LstatIfPossible(path)
-		return fi, err
-	}
-
-	return fs.Stat(path)
-}
-
 // SafeWriteToDisk is the same as WriteToDisk
 // but it also checks to see if file/directory already exists.
 func SafeWriteToDisk(inpath string, r io.Reader, fs afero.Fs) (err error) {
@@ -382,7 +314,7 @@ func OpenFileForWriting(fs afero.Fs, filename string) (afero.File, error) {
 		if !herrors.IsNotExist(err) {
 			return nil, err
 		}
-		if err = fs.MkdirAll(filepath.Dir(filename), 0777); err != nil { //  before umask
+		if err = fs.MkdirAll(filepath.Dir(filename), 0o777); err != nil { //  before umask
 			return nil, err
 		}
 		f, err = fs.Create(filename)
@@ -402,7 +334,7 @@ func GetCacheDir(fs afero.Fs, cacheDir string) (string, error) {
 			return "", err
 		}
 		if !exists {
-			err := fs.MkdirAll(cacheDir, 0777) // Before umask
+			err := fs.MkdirAll(cacheDir, 0o777) // Before umask
 			if err != nil {
 				return "", fmt.Errorf("failed to create cache dir: %w", err)
 			}
@@ -417,7 +349,7 @@ func GetCacheDir(fs afero.Fs, cacheDir string) (string, error) {
 		userCacheDir, err := os.UserCacheDir()
 		if err == nil {
 			cacheDir := filepath.Join(userCacheDir, hugoCacheBase)
-			if err := fs.Mkdir(cacheDir, 0777); err == nil || os.IsExist(err) {
+			if err := fs.Mkdir(cacheDir, 0o777); err == nil || os.IsExist(err) {
 				return cacheDir, nil
 			}
 		}
@@ -494,12 +426,3 @@ func IsEmpty(path string, fs afero.Fs) (bool, error) {
 func Exists(path string, fs afero.Fs) (bool, error) {
 	return afero.Exists(fs, path)
 }
-
-// AddTrailingSlash adds a trailing Unix styled slash (/) if not already
-// there.
-func AddTrailingSlash(path string) string {
-	if !strings.HasSuffix(path, "/") {
-		path += "/"
-	}
-	return path
-}

helpers/path_test.go

@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -134,7 +134,6 @@ func TestMakePathRelative(t *testing.T) {
 }
 
 func TestGetDottedRelativePath(t *testing.T) {
-	// on Windows this will receive both kinds, both country and western ...
 	for _, f := range []func(string) string{filepath.FromSlash, func(s string) string { return s }} {
 		doTestGetDottedRelativePath(f, t)
 	}
@@ -258,7 +257,7 @@ func createNonZeroSizedFileInTempDir(t *testing.T) *os.File {
 
 	f := createZeroSizedFileInTempDir(t)
 	byteString := []byte("byteString")
-	err := os.WriteFile(f.Name(), byteString, 0644)
+	err := os.WriteFile(f.Name(), byteString, 0o644)
 	if err != nil {
 		t.Error(err)
 	}

helpers/pathspec.go

@@ -74,9 +74,5 @@ func NewPathSpecWithBaseBaseFsProvided(fs *hugofs.Fs, cfg config.AllProvider, lo
 
 // PermalinkForBaseURL creates a permalink from the given link and baseURL.
 func (p *PathSpec) PermalinkForBaseURL(link, baseURL string) string {
-	link = strings.TrimPrefix(link, "/")
+	return baseURL + strings.TrimPrefix(link, "/")
-	if !strings.HasSuffix(baseURL, "/") {
-		baseURL += "/"
-	}
-	return baseURL + link
 }