Add /config dir support

This commit adds support for a configuration directory (default `config`). The different pieces in this puzzle are:

* A new `--environment` (or `-e`) flag. This can also be set with the `HUGO_ENVIRONMENT` OS environment variable. The value for `environment` defaults to `production` when running `hugo` and `development` when running `hugo server`. You can set it to any value you want (e.g. `hugo server -e "Sensible Environment"`), but as it is used to load configuration from the file system, the letter case may be important. You can get this value in your templates with `{{ hugo.Environment }}`.
* A new `--configDir` flag (defaults to `config` below your project). This can also be set with `HUGO_CONFIGDIR` OS environment variable.

If the `configDir` exists, the configuration files will be read and merged on top of each other from left to right; the right-most value will win on duplicates.

Given the example tree below:

If `environment` is `production`, the left-most `config.toml` would be the one directly below the project (this can now be omitted if you want), and then `_default/config.toml` and finally `production/config.toml`. And since these will be merged, you can just provide the environment specific configuration setting in you production config, e.g. `enableGitInfo = true`. The order within the directories will be lexical (`config.toml` and then `params.toml`).

```bash
config
├── _default
│   ├── config.toml
│   ├── languages.toml
│   ├── menus
│   │   ├── menus.en.toml
│   │   └── menus.zh.toml
│   └── params.toml
├── development
│   └── params.toml
└── production
    ├── config.toml
    └── params.toml
```

Some configuration maps support the language code in the filename (e.g. `menus.en.toml`): `menus` (`menu` also works) and `params`.

Also note that the only folders with "a meaning" in the above listing is the top level directories below `config`. The `menus` sub folder is just added for better organization.

We use `TOML` in the example above, but Hugo also supports `JSON` and `YAML` as configuration formats. These can be mixed.

Fixes #5422

commands/commandeer.go

@@ -249,6 +249,8 @@ func (c *commandeer) loadConfig(mustHaveConfigFile, running bool) error {
 		sourceFs = c.DepsCfg.Fs.Source
 	}
 
+	environment := c.h.getEnvironment(running)
+
 	doWithConfig := func(cfg config.Provider) error {
 
 		if c.ftch != nil {
@@ -256,7 +258,7 @@ func (c *commandeer) loadConfig(mustHaveConfigFile, running bool) error {
 		}
 
 		cfg.Set("workingDir", dir)
-
+		cfg.Set("environment", environment)
 		return nil
 	}
 
@@ -269,8 +271,18 @@ func (c *commandeer) loadConfig(mustHaveConfigFile, running bool) error {
 		return err
 	}
 
+	configPath := c.h.source
+	if configPath == "" {
+		configPath = dir
+	}
 	config, configFiles, err := hugolib.LoadConfig(
-		hugolib.ConfigSourceDescriptor{Fs: sourceFs, Path: c.h.source, WorkingDir: dir, Filename: c.h.cfgFile},
+		hugolib.ConfigSourceDescriptor{
+			Fs:           sourceFs,
+			Path:         configPath,
+			WorkingDir:   dir,
+			Filename:     c.h.cfgFile,
+			AbsConfigDir: c.h.getConfigDir(dir),
+			Environment:  environment},
 		doWithCommandeer,
 		doWithConfig)
 

commands/commands.go

@@ -14,6 +14,11 @@
 package commands
 
 import (
+	"os"
+
+	"github.com/gohugoio/hugo/hugolib/paths"
+
+	"github.com/gohugoio/hugo/common/hugo"
 	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/helpers"
@@ -159,6 +164,7 @@ Complete documentation is available at http://gohugo.io/.`,
 	})
 
 	cc.cmd.PersistentFlags().StringVar(&cc.cfgFile, "config", "", "config file (default is path/config.yaml|json|toml)")
+	cc.cmd.PersistentFlags().StringVar(&cc.cfgDir, "configDir", "config", "config dir")
 	cc.cmd.PersistentFlags().BoolVar(&cc.quiet, "quiet", false, "build in quiet mode")
 
 	// Set bash-completion
@@ -185,8 +191,9 @@ Complete documentation is available at http://gohugo.io/.`,
 }
 
 type hugoBuilderCommon struct {
-	source  string
-	baseURL string
+	source      string
+	baseURL     string
+	environment string
 
 	buildWatch bool
 
@@ -200,15 +207,45 @@ type hugoBuilderCommon struct {
 	quiet      bool
 
 	cfgFile string
+	cfgDir  string
 	logFile string
 }
 
+func (cc *hugoBuilderCommon) getConfigDir(baseDir string) string {
+	if cc.cfgDir != "" {
+		return paths.AbsPathify(baseDir, cc.cfgDir)
+	}
+
+	if v, found := os.LookupEnv("HUGO_CONFIGDIR"); found {
+		return paths.AbsPathify(baseDir, v)
+	}
+
+	return paths.AbsPathify(baseDir, "config")
+}
+
+func (cc *hugoBuilderCommon) getEnvironment(isServer bool) string {
+	if cc.environment != "" {
+		return cc.environment
+	}
+
+	if v, found := os.LookupEnv("HUGO_ENVIRONMENT"); found {
+		return v
+	}
+
+	if isServer {
+		return hugo.EnvironmentDevelopment
+	}
+
+	return hugo.EnvironmentProduction
+}
+
 func (cc *hugoBuilderCommon) handleFlags(cmd *cobra.Command) {
 	cmd.Flags().Bool("cleanDestinationDir", false, "remove files from destination not found in static directories")
 	cmd.Flags().BoolP("buildDrafts", "D", false, "include content marked as draft")
 	cmd.Flags().BoolP("buildFuture", "F", false, "include content with publishdate in the future")
 	cmd.Flags().BoolP("buildExpired", "E", false, "include expired content")
 	cmd.Flags().StringVarP(&cc.source, "source", "s", "", "filesystem path to read files relative from")
+	cmd.Flags().StringVarP(&cc.environment, "environment", "e", "", "build environment")
 	cmd.Flags().StringP("contentDir", "c", "", "filesystem path to content directory")
 	cmd.Flags().StringP("layoutDir", "l", "", "filesystem path to layout directory")
 	cmd.Flags().StringP("cacheDir", "", "", "filesystem path to cache directory. Defaults: $TMPDIR/hugo_cache/")

commands/commands_test.go

@@ -56,8 +56,11 @@ func TestCommandsPersistentFlags(t *testing.T) {
 		check func(command []cmder)
 	}{{[]string{"server",
 		"--config=myconfig.toml",
+		"--configDir=myconfigdir",
 		"--contentDir=mycontent",
 		"--disableKinds=page,home",
+		"--environment=testing",
+		"--configDir=myconfigdir",
 		"--layoutDir=mylayouts",
 		"--theme=mytheme",
 		"--gc",
@@ -78,6 +81,7 @@ func TestCommandsPersistentFlags(t *testing.T) {
 			if b, ok := command.(commandsBuilderGetter); ok {
 				v := b.getCommandsBuilder().hugoBuilderCommon
 				assert.Equal("myconfig.toml", v.cfgFile)
+				assert.Equal("myconfigdir", v.cfgDir)
 				assert.Equal("mysource", v.source)
 				assert.Equal("https://example.com/b/", v.baseURL)
 			}
@@ -93,6 +97,7 @@ func TestCommandsPersistentFlags(t *testing.T) {
 		assert.True(sc.noHTTPCache)
 		assert.True(sc.renderToDisk)
 		assert.Equal(1366, sc.serverPort)
+		assert.Equal("testing", sc.environment)
 
 		cfg := viper.New()
 		sc.flagsToConfig(cfg)
@@ -233,6 +238,7 @@ Single: {{ .Title }}
 	writeFile(t, filepath.Join(d, "layouts", "_default", "list.html"), `
 
 List: {{ .Title }}
+Environment: {{ hugo.Environment }}
 
 `)
 

commands/hugo.go

@@ -718,8 +718,8 @@ func (c *commandeer) newWatcher(dirList ...string) (*watcher.Batcher, error) {
 	// Identifies changes to config (config.toml) files.
 	configSet := make(map[string]bool)
 
+	c.logger.FEEDBACK.Println("Watching for config changes in", strings.Join(c.configFiles, ", "))
 	for _, configFile := range c.configFiles {
-		c.logger.FEEDBACK.Println("Watching for config changes in", configFile)
 		watcher.Add(configFile)
 		configSet[configFile] = true
 	}
@@ -750,7 +750,17 @@ func (c *commandeer) handleEvents(watcher *watcher.Batcher,
 	configSet map[string]bool) {
 
 	for _, ev := range evs {
-		if configSet[ev.Name] {
+		isConfig := configSet[ev.Name]
+		if !isConfig {
+			// It may be one of the /config folders
+			dirname := filepath.Dir(ev.Name)
+			if dirname != "." && configSet[dirname] {
+				isConfig = true
+			}
+
+		}
+
+		if isConfig {
 			if ev.Op&fsnotify.Chmod == fsnotify.Chmod {
 				continue
 			}
@@ -766,7 +776,7 @@ func (c *commandeer) handleEvents(watcher *watcher.Batcher,
 					}
 				}
 			}
-			// Config file changed. Need full rebuild.
+			// Config file(s) changed. Need full rebuild.
 			c.fullRebuild()
 			break
 		}

commands/server.go

@@ -36,7 +36,6 @@ import (
 	"github.com/gohugoio/hugo/tpl"
 
 	"github.com/gohugoio/hugo/config"
-
 	"github.com/gohugoio/hugo/helpers"
 	"github.com/spf13/afero"
 	"github.com/spf13/cobra"
@@ -301,6 +300,8 @@ func (f *fileServer) createEndpoint(i int) (*http.ServeMux, string, string, erro
 
 	absPublishDir := f.c.hugo.PathSpec.AbsPathify(publishDir)
 
+	jww.FEEDBACK.Printf("Environment: %q", f.c.hugo.Deps.Site.Hugo().Environment)
+
 	if i == 0 {
 		if f.s.renderToDisk {
 			jww.FEEDBACK.Println("Serving pages from " + absPublishDir)

commands/server_test.go

@@ -68,6 +68,7 @@ func TestServer(t *testing.T) {
 	homeContent := helpers.ReaderToString(resp.Body)
 
 	assert.Contains(homeContent, "List: Hugo Commands")
+	assert.Contains(homeContent, "Environment: development")
 
 	// Stop the server.
 	stop <- true

common/herrors/error_locator.go

@@ -17,10 +17,10 @@ package herrors
 import (
 	"io"
 	"io/ioutil"
+	"path/filepath"
 	"strings"
 
 	"github.com/gohugoio/hugo/common/text"
-	"github.com/gohugoio/hugo/helpers"
 
 	"github.com/spf13/afero"
 )
@@ -172,12 +172,16 @@ func chromaLexerFromType(fileType string) string {
 	return fileType
 }
 
+func extNoDelimiter(filename string) string {
+	return strings.TrimPrefix(".", filepath.Ext(filename))
+}
+
 func chromaLexerFromFilename(filename string) string {
 	if strings.Contains(filename, "layouts") {
 		return "go-html-template"
 	}
 
-	ext := helpers.ExtNoDelimiter(filename)
+	ext := extNoDelimiter(filename)
 	return chromaLexerFromType(ext)
 }
 

common/hugo/hugo.go

@@ -18,28 +18,50 @@ import (
 	"html/template"
 )
 
-var (
-	// CommitHash contains the current Git revision. Use make to build to make
-	// sure this gets set.
-	CommitHash string
+const (
+	EnvironmentDevelopment = "development"
+	EnvironmentProduction  = "production"
+)
 
-	// BuildDate contains the date of the current build.
-	BuildDate string
+var (
+	// commitHash contains the current Git revision. Use make to build to make
+	// sure this gets set.
+	commitHash string
+
+	// buildDate contains the date of the current build.
+	buildDate string
 )
 
 // Info contains information about the current Hugo environment
 type Info struct {
-	Version    VersionString
-	Generator  template.HTML
 	CommitHash string
 	BuildDate  string
+
+	// The build environment.
+	// Defaults are "production" (hugo) and "development" (hugo server).
+	// This can also be set by the user.
+	// It can be any string, but it will be all lower case.
+	Environment string
 }
 
-func NewInfo() Info {
+// Version returns the current version as a comparable version string.
+func (i Info) Version() VersionString {
+	return CurrentVersion.Version()
+}
+
+// Generator a Hugo meta generator HTML tag.
+func (i Info) Generator() template.HTML {
+	return template.HTML(fmt.Sprintf(`<meta name="generator" content="Hugo %s" />`, CurrentVersion.String()))
+}
+
+// NewInfo creates a new Hugo Info object.
+func NewInfo(environment string) Info {
+	if environment == "" {
+		environment = EnvironmentProduction
+	}
 	return Info{
-		Version:    CurrentVersion.Version(),
-		CommitHash: CommitHash,
-		BuildDate:  BuildDate,
-		Generator:  template.HTML(fmt.Sprintf(`<meta name="generator" content="Hugo %s" />`, CurrentVersion.String())),
+		CommitHash:  commitHash,
+		BuildDate:   buildDate,
+		Environment: environment,
 	}
 }

common/hugo/hugo_test.go

@@ -23,12 +23,13 @@ import (
 func TestHugoInfo(t *testing.T) {
 	assert := require.New(t)
 
-	hugoInfo := NewInfo()
+	hugoInfo := NewInfo("")
 
-	assert.Equal(CurrentVersion.Version(), hugoInfo.Version)
-	assert.IsType(VersionString(""), hugoInfo.Version)
-	assert.Equal(CommitHash, hugoInfo.CommitHash)
-	assert.Equal(BuildDate, hugoInfo.BuildDate)
-	assert.Contains(hugoInfo.Generator, fmt.Sprintf("Hugo %s", hugoInfo.Version))
+	assert.Equal(CurrentVersion.Version(), hugoInfo.Version())
+	assert.IsType(VersionString(""), hugoInfo.Version())
+	assert.Equal(commitHash, hugoInfo.CommitHash)
+	assert.Equal(buildDate, hugoInfo.BuildDate)
+	assert.Equal("production", hugoInfo.Environment)
+	assert.Contains(hugoInfo.Generator(), fmt.Sprintf("Hugo %s", hugoInfo.Version()))
 
 }

common/hugo/version.go

@@ -130,8 +130,8 @@ func BuildVersionString() string {
 	program := "Hugo Static Site Generator"
 
 	version := "v" + CurrentVersion.String()
-	if CommitHash != "" {
-		version += "-" + strings.ToUpper(CommitHash)
+	if commitHash != "" {
+		version += "-" + strings.ToUpper(commitHash)
 	}
 	if isExtended {
 		version += "/extended"
@@ -139,14 +139,12 @@ func BuildVersionString() string {
 
 	osArch := runtime.GOOS + "/" + runtime.GOARCH
 
-	var buildDate string
-	if BuildDate != "" {
-		buildDate = BuildDate
-	} else {
-		buildDate = "unknown"
+	date := buildDate
+	if date == "" {
+		date = "unknown"
 	}
 
-	return fmt.Sprintf("%s %s %s BuildDate: %s", program, version, osArch, buildDate)
+	return fmt.Sprintf("%s %s %s BuildDate: %s", program, version, osArch, date)
 
 }
 

common/maps/maps.go

@@ -16,6 +16,8 @@ package maps
 import (
 	"strings"
 
+	"github.com/gobwas/glob"
+
 	"github.com/spf13/cast"
 )
 
@@ -42,3 +44,73 @@ func ToLower(m map[string]interface{}) {
 
 	}
 }
+
+type keyRename struct {
+	pattern glob.Glob
+	newKey  string
+}
+
+// KeyRenamer supports renaming of keys in a map.
+type KeyRenamer struct {
+	renames []keyRename
+}
+
+// NewKeyRenamer creates a new KeyRenamer given a list of pattern and new key
+// value pairs.
+func NewKeyRenamer(patternKeys ...string) (KeyRenamer, error) {
+	var renames []keyRename
+	for i := 0; i < len(patternKeys); i += 2 {
+		g, err := glob.Compile(strings.ToLower(patternKeys[i]), '/')
+		if err != nil {
+			return KeyRenamer{}, err
+		}
+		renames = append(renames, keyRename{pattern: g, newKey: patternKeys[i+1]})
+	}
+
+	return KeyRenamer{renames: renames}, nil
+}
+
+func (r KeyRenamer) getNewKey(keyPath string) string {
+	for _, matcher := range r.renames {
+		if matcher.pattern.Match(keyPath) {
+			return matcher.newKey
+		}
+	}
+
+	return ""
+}
+
+// Rename renames the keys in the given map according
+// to the patterns in the current KeyRenamer.
+func (r KeyRenamer) Rename(m map[string]interface{}) {
+	r.renamePath("", m)
+}
+
+func (KeyRenamer) keyPath(k1, k2 string) string {
+	k1, k2 = strings.ToLower(k1), strings.ToLower(k2)
+	if k1 == "" {
+		return k2
+	} else {
+		return k1 + "/" + k2
+	}
+}
+
+func (r KeyRenamer) renamePath(parentKeyPath string, m map[string]interface{}) {
+	for key, val := range m {
+		keyPath := r.keyPath(parentKeyPath, key)
+		switch val.(type) {
+		case map[interface{}]interface{}:
+			val = cast.ToStringMap(val)
+			r.renamePath(keyPath, val.(map[string]interface{}))
+		case map[string]interface{}:
+			r.renamePath(keyPath, val.(map[string]interface{}))
+		}
+
+		newKey := r.getNewKey(keyPath)
+
+		if newKey != "" {
+			delete(m, key)
+			m[newKey] = val
+		}
+	}
+}

common/maps/maps_test.go

@@ -16,6 +16,8 @@ package maps
 import (
 	"reflect"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func TestToLower(t *testing.T) {
@@ -70,3 +72,52 @@ func TestToLower(t *testing.T) {
 		}
 	}
 }
+
+func TestRenameKeys(t *testing.T) {
+	assert := require.New(t)
+
+	m := map[string]interface{}{
+		"a":    32,
+		"ren1": "m1",
+		"ren2": "m1_2",
+		"sub": map[string]interface{}{
+			"subsub": map[string]interface{}{
+				"REN1": "m2",
+				"ren2": "m2_2",
+			},
+		},
+		"no": map[string]interface{}{
+			"ren1": "m2",
+			"ren2": "m2_2",
+		},
+	}
+
+	expected := map[string]interface{}{
+		"a":    32,
+		"new1": "m1",
+		"new2": "m1_2",
+		"sub": map[string]interface{}{
+			"subsub": map[string]interface{}{
+				"new1": "m2",
+				"ren2": "m2_2",
+			},
+		},
+		"no": map[string]interface{}{
+			"ren1": "m2",
+			"ren2": "m2_2",
+		},
+	}
+
+	renamer, err := NewKeyRenamer(
+		"{ren1,sub/*/ren1}", "new1",
+		"{Ren2,sub/ren2}", "new2",
+	)
+	assert.NoError(err)
+
+	renamer.Rename(m)
+
+	if !reflect.DeepEqual(expected, m) {
+		t.Errorf("Expected\n%#v, got\n%#v\n", expected, m)
+	}
+
+}

config/configLoader.go

@@ -0,0 +1,106 @@
+// 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 config
+
+import (
+	"github.com/gohugoio/hugo/common/maps"
+	"github.com/gohugoio/hugo/parser/metadecoders"
+	"github.com/spf13/afero"
+	"github.com/spf13/viper"
+)
+
+// FromConfigString creates a config from the given YAML, JSON or TOML config. This is useful in tests.
+func FromConfigString(config, configType string) (Provider, error) {
+	v := newViper()
+	m, err := readConfig(metadecoders.FormatFromString(configType), []byte(config))
+	if err != nil {
+		return nil, err
+	}
+
+	v.MergeConfigMap(m)
+
+	return v, nil
+}
+
+// FromFile loads the configuration from the given filename.
+func FromFile(fs afero.Fs, filename string) (Provider, error) {
+	m, err := loadConfigFromFile(fs, filename)
+	if err != nil {
+		return nil, err
+	}
+
+	v := newViper()
+
+	err = v.MergeConfigMap(m)
+	if err != nil {
+		return nil, err
+	}
+
+	return v, nil
+}
+
+// FromFileToMap is the same as FromFile, but it returns the config values
+// as a simple map.
+func FromFileToMap(fs afero.Fs, filename string) (map[string]interface{}, error) {
+	return loadConfigFromFile(fs, filename)
+}
+
+func readConfig(format metadecoders.Format, data []byte) (map[string]interface{}, error) {
+	m, err := metadecoders.UnmarshalToMap(data, format)
+	if err != nil {
+		return nil, err
+	}
+
+	RenameKeys(m)
+
+	return m, nil
+
+}
+
+func loadConfigFromFile(fs afero.Fs, filename string) (map[string]interface{}, error) {
+	m, err := metadecoders.UnmarshalFileToMap(fs, filename)
+	if err != nil {
+		return nil, err
+	}
+	RenameKeys(m)
+	return m, nil
+}
+
+var keyAliases maps.KeyRenamer
+
+func init() {
+	var err error
+	keyAliases, err = maps.NewKeyRenamer(
+		// Before 0.53 we used singular for "menu".
+		"{menu,languages/*/menu}", "menus",
+	)
+
+	if err != nil {
+		panic(err)
+	}
+}
+
+// RenameKeys renames config keys in m recursively according to a global Hugo
+// alias definition.
+func RenameKeys(m map[string]interface{}) {
+	keyAliases.Rename(m)
+}
+
+func newViper() *viper.Viper {
+	v := viper.New()
+	v.AutomaticEnv()
+	v.SetEnvPrefix("hugo")
+
+	return v
+}

config/configProvider.go

@@ -14,11 +14,7 @@
 package config
 
 import (
-	"strings"
-
 	"github.com/spf13/cast"
-
-	"github.com/spf13/viper"
 )
 
 // Provider provides the configuration settings for Hugo.
@@ -34,16 +30,6 @@ type Provider interface {
 	IsSet(key string) bool
 }
 
-// FromConfigString creates a config from the given YAML, JSON or TOML config. This is useful in tests.
-func FromConfigString(config, configType string) (Provider, error) {
-	v := viper.New()
-	v.SetConfigType(configType)
-	if err := v.ReadConfig(strings.NewReader(config)); err != nil {
-		return nil, err
-	}
-	return v, nil
-}
-
 // GetStringSlicePreserveString returns a string slice from the given config and key.
 // It differs from the GetStringSlice method in that if the config value is a string,
 // we do not attempt to split it into fields.

go.mod

@@ -33,7 +33,7 @@ require (
 	github.com/mattn/go-runewidth v0.0.3 // indirect
 	github.com/miekg/mmark v1.3.6
 	github.com/mitchellh/hashstructure v1.0.0
-	github.com/mitchellh/mapstructure v1.0.0
+	github.com/mitchellh/mapstructure v1.1.2
 	github.com/muesli/smartcrop v0.0.0-20180228075044-f6ebaa786a12
 	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect
 	github.com/nicksnyder/go-i18n v1.10.0
@@ -50,16 +50,18 @@ require (
 	github.com/spf13/jwalterweatherman v1.0.1-0.20181028145347-94f6ae3ed3bc
 	github.com/spf13/nitro v0.0.0-20131003134307-24d7ef30a12d
 	github.com/spf13/pflag v1.0.3
-	github.com/spf13/viper v1.2.0
+	github.com/spf13/viper v1.3.1
 	github.com/stretchr/testify v1.2.3-0.20181014000028-04af85275a5c
 	github.com/tdewolff/minify/v2 v2.3.7
+	github.com/ugorji/go/codec v0.0.0-20181206144755-e72634d4d386 // indirect
 	github.com/yosssi/ace v0.0.5
 	golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81
 	golang.org/x/net v0.0.0-20180906233101-161cd47e91fd // indirect
 	golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f
+	golang.org/x/sys v0.0.0-20181206074257-70b957f3b65e // indirect
 	golang.org/x/text v0.3.0
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
-	gopkg.in/yaml.v2 v2.2.1
+	gopkg.in/yaml.v2 v2.2.2
 )
 
 exclude github.com/chaseadamsio/goorgeous v2.0.0+incompatible

go.sum

@@ -14,6 +14,7 @@ github.com/alecthomas/colour v0.0.0-20160524082231-60882d9e2721 h1:JHZL0hZKJ1VEN
 github.com/alecthomas/colour v0.0.0-20160524082231-60882d9e2721/go.mod h1:QO9JBoKquHd+jz9nshCh40fOfO+JzsoXy8qTHF68zU0=
 github.com/alecthomas/repr v0.0.0-20180818092828-117648cd9897 h1:p9Sln00KOTlrYkxI1zYWl1QLnEqAqEARBEYa8FQnQcY=
 github.com/alecthomas/repr v0.0.0-20180818092828-117648cd9897/go.mod h1:xTS7Pm1pD1mvyM075QCDSRqH6qRLXylzS24ZTpRiSzQ=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/bep/debounce v1.1.0 h1:6ocXeW2iZ/7vAzgXz82J00tYxncMiEEBExPftTtOQzk=
 github.com/bep/debounce v1.1.0/go.mod h1:H8yggRPQKLUhUoqrJC1bO2xNya7vanpDl7xR3ISbCJ0=
 github.com/bep/gitmap v1.0.0 h1:cTTZwq7vpGuhwefKCBDV9UrHnZAPVJTvoWobimrqkUc=
@@ -24,6 +25,9 @@ github.com/chaseadamsio/goorgeous v1.1.0 h1:J9UrYDhzucUMHXsCKG+kICvpR5dT1cqZdVFT
 github.com/chaseadamsio/goorgeous v1.1.0/go.mod h1:6QaC0vFoKWYDth94dHFNgRT2YkT5FHdQp/Yx15aAAi0=
 github.com/cheekybits/is v0.0.0-20150225183255-68e9c0620927 h1:SKI1/fuSdodxmNNyVBR8d7X/HuLnRpvvFO0AgyQk764=
 github.com/cheekybits/is v0.0.0-20150225183255-68e9c0620927/go.mod h1:h/aW8ynjgkuj+NQRlZcDbAbM1ORAbXjXX77sX7T289U=
+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/cpuguy83/go-md2man v1.0.8 h1:DwoNytLphI8hzS2Af4D0dfaEaiSq2bN05mEm4R6vf8M=
 github.com/cpuguy83/go-md2man v1.0.8/go.mod h1:N6JayAiVKtlHSnuTCeuLSQVs75hb8q+dYQLjr7cDsKY=
 github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964 h1:y5HC9v93H5EPKqaS1UYVg1uYah5Xf51mBfIoWehClUQ=
@@ -79,8 +83,8 @@ github.com/miekg/mmark v1.3.6 h1:t47x5vThdwgLJzofNsbsAl7gmIiJ7kbDQN5BxwBmwvY=
 github.com/miekg/mmark v1.3.6/go.mod h1:w7r9mkTvpS55jlfyn22qJ618itLryxXBhA7Jp3FIlkw=
 github.com/mitchellh/hashstructure v1.0.0 h1:ZkRJX1CyOoTkar7p/mLS5TZU4nJ1Rn/F8u9dGS02Q3Y=
 github.com/mitchellh/hashstructure v1.0.0/go.mod h1:QjSHrPWS+BGUVBYkbTZWEnOh3G1DutKwClXU/ABz6AQ=
-github.com/mitchellh/mapstructure v1.0.0 h1:vVpGvMXJPqSDh2VYHF7gsfQj8Ncx+Xw5Y1KHeTRY+7I=
-github.com/mitchellh/mapstructure v1.0.0/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/mitchellh/mapstructure v1.1.2 h1:fmNYVwqnSfB9mZU6OS2O6GsXM+wcskZDuKQzvN1EDeE=
+github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/muesli/smartcrop v0.0.0-20180228075044-f6ebaa786a12 h1:l0X/8IDy2UoK+oXcQFMRSIOcyuYb5iEPytPGplnM41Y=
 github.com/muesli/smartcrop v0.0.0-20180228075044-f6ebaa786a12/go.mod h1:i2fCI/UorTfgEpPPLWiFBv4pye+YAG78RwcQLUkocpI=
 github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
@@ -105,8 +109,6 @@ github.com/shurcooL/sanitized_anchor_name v0.0.0-20170918181015-86672fcb3f95 h1:
 github.com/shurcooL/sanitized_anchor_name v0.0.0-20170918181015-86672fcb3f95/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/spf13/afero v1.1.2 h1:m8/z1t7/fwjysjQRYbP0RD+bUIF/8tJwPdEZsI83ACI=
 github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
-github.com/spf13/cast v1.2.0 h1:HHl1DSRbEQN2i8tJmtS6ViPyHx35+p51amrdsiTCrkg=
-github.com/spf13/cast v1.2.0/go.mod h1:r2rcYCSwa1IExKTDiTfzaxqT2FNHs8hODu4LnUfgKEg=
 github.com/spf13/cast v1.3.0 h1:oget//CVOEoFewqQxwr0Ej5yjygnqGkvggSE/gB35Q8=
 github.com/spf13/cast v1.3.0/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
 github.com/spf13/cobra v0.0.3 h1:ZlrZ4XsMRm04Fr5pSFxBgfND2EBVa1nLpiy1stUsX/8=
@@ -119,12 +121,12 @@ github.com/spf13/jwalterweatherman v1.0.1-0.20181028145347-94f6ae3ed3bc h1:Iwxhe
 github.com/spf13/jwalterweatherman v1.0.1-0.20181028145347-94f6ae3ed3bc/go.mod h1:aNWZUN0dPAAO/Ljvb5BEdw96iTZ0EXowPYD95IqWIGo=
 github.com/spf13/nitro v0.0.0-20131003134307-24d7ef30a12d h1:ihvj2nmx8eqWjlgNgdW6h0DyGJuq5GiwHadJkG0wXtQ=
 github.com/spf13/nitro v0.0.0-20131003134307-24d7ef30a12d/go.mod h1:jU8A+8xL+6n1OX4XaZtCj4B3mIa64tULUsD6YegdpFo=
-github.com/spf13/pflag v1.0.2 h1:Fy0orTDgHdbnzHcsOgfCN4LtHf0ec3wwtiwJqwvf3Gc=
-github.com/spf13/pflag v1.0.2/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
 github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
-github.com/spf13/viper v1.2.0 h1:M4Rzxlu+RgU4pyBRKhKaVN1VeYOm8h2jgyXnAseDgCc=
-github.com/spf13/viper v1.2.0/go.mod h1:P4AexN0a+C9tGAnUFNwDMYYZv3pjFuvmeiMyKRaNVlI=
+github.com/spf13/viper v1.3.0 h1:cO6QlTTeK9RQDhFAbGLV5e3fHXbRpin/Gi8qfL4rdLk=
+github.com/spf13/viper v1.3.0/go.mod h1:ZiWeW+zYFKm7srdB9IoDzzZXaJaI5eL9QjNiN/DMA2s=
+github.com/spf13/viper v1.3.1 h1:5+8j8FTpnFV4nEImW/ofkzEt8VoOiLXxdYIDsB73T38=
+github.com/spf13/viper v1.3.1/go.mod h1:ZiWeW+zYFKm7srdB9IoDzzZXaJaI5eL9QjNiN/DMA2s=
 github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.2.3-0.20181014000028-04af85275a5c h1:03OmljzZYsezlgAfa+f/cY8E8XXPiFh5bgANMhUlDI4=
@@ -135,24 +137,30 @@ github.com/tdewolff/parse/v2 v2.3.5 h1:/uS8JfhwVJsNkEh769GM5ENv6L9LOh2Z9uW3tCdlh
 github.com/tdewolff/parse/v2 v2.3.5/go.mod h1:HansaqmN4I/U7L6/tUp0NcwT2tFO0F4EAWYGSDzkYNk=
 github.com/tdewolff/test v1.0.0 h1:jOwzqCXr5ePXEPGJaq2ivoR6HOCi+D5TPfpoyg8yvmU=
 github.com/tdewolff/test v1.0.0/go.mod h1:DiQUlutnqlEvdvhSn2LPGy4TFwRauAaYDsL+683RNX4=
+github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
+github.com/ugorji/go/codec v0.0.0-20181206144755-e72634d4d386/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
 github.com/wellington/go-libsass v0.9.3-0.20181113175235-c63644206701 h1:9vG9vvVNVupO4Y7uwFkRgIMNe9rdaJMCINDe8vhAhLo=
 github.com/wellington/go-libsass v0.9.3-0.20181113175235-c63644206701/go.mod h1:mxgxgam0N0E+NAUMHLcu20Ccfc3mVpDkyrLDayqfiTs=
+github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
 github.com/yosssi/ace v0.0.5 h1:tUkIP/BLdKqrlrPwcmH0shwEEhTRHoGnc1wFIWmaBUA=
 github.com/yosssi/ace v0.0.5/go.mod h1:ALfIzm2vT7t5ZE7uoIZqF3TQ7SAOyupFZnkrF5id+K0=
+golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81 h1:00VmoueYNlNz/aHIilyyQz/MHSqGoWJzpFv/HW8xpzI=
 golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81/go.mod h1:ux5Hcp/YLpHSI86hEcLt0YII63i6oz57MZXIpbrjZUs=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd h1:nTDtHvHSdCn1m6ITfMRqtOd/9+7a3s8RBNOZ3eYZzJA=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180906133057-8cf3aee42992 h1:BH3eQWeGbwRU2+wxxuuPOdFBmaiBH81O8BugSjHeTFg=
-golang.org/x/sys v0.0.0-20180906133057-8cf3aee42992/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181031143558-9b800f95dbbc h1:SdCq5U4J+PpbSDIl9bM0V1e1Ug1jsnBkAFvTs1htn7U=
 golang.org/x/sys v0.0.0-20181031143558-9b800f95dbbc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a h1:1n5lsVfiQW3yfsRGu98756EH1YthsFqr/5mxHduZW2A=
+golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181206074257-70b957f3b65e h1:njOxP/wVblhCLIUhjHXf6X+dzTt5OQ3vMQo9mkOIKIo=
+golang.org/x/sys v0.0.0-20181206074257-70b957f3b65e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

goreleaser-extended.yml

@@ -2,7 +2,7 @@ project_name: hugo_extended
 builds:
 - binary: hugo
   ldflags:
-    - -s -w -X github.com/gohugoio/hugo/common/hugo.BuildDate={{.Date}} -X github.com/gohugoio/hugo/common/hugo.CommitHash={{ .ShortCommit }}
+    - -s -w -X github.com/gohugoio/hugo/common/hugo.buildDate={{.Date}} -X github.com/gohugoio/hugo/common/hugo.commitHash={{ .ShortCommit }}
     - "-extldflags '-static'"
   env:
     - CGO_ENABLED=1

goreleaser.yml

@@ -2,7 +2,7 @@ project_name: hugo
 build:
   main: main.go
   binary: hugo
-  ldflags: -s -w -X github.com/gohugoio/hugo/common/hugo.BuildDate={{.Date}} -X github.com/gohugoio/hugo/common/hugo.CommitHash={{ .ShortCommit }}
+  ldflags: -s -w -X github.com/gohugoio/hugo/common/hugo.buildDate={{.Date}} -X github.com/gohugoio/hugo/common/hugo.commitHash={{ .ShortCommit }}
   env:
     - CGO_ENABLED=0
   goos:

helpers/path.go

@@ -274,6 +274,13 @@ func FileAndExt(in string) (string, string) {
 	return fileAndExt(in, fpb)
 }
 
+// FileAndExtNoDelimiter takes a path and returns the file and extension separated,
+// the extension excluding the delmiter, e.g "md".
+func FileAndExtNoDelimiter(in string) (string, string) {
+	file, ext := fileAndExt(in, fpb)
+	return file, strings.TrimPrefix(ext, ".")
+}
+
 // Filename takes a path, strips out the extension,
 // and returns the name of the file.
 func Filename(in string) (name string) {
@@ -400,6 +407,8 @@ func ExtractRootPaths(paths []string) []string {
 
 }
 
+var numInPathRe = regexp.MustCompile("\\.(\\d+)\\.")
+
 // FindCWD returns the current working directory from where the Hugo
 // executable is run.
 func FindCWD() (string, error) {

htesting/test_structs.go

@@ -39,7 +39,7 @@ func (t testSite) Language() *langs.Language {
 // NewTestHugoSite creates a new minimal test site.
 func NewTestHugoSite() hugo.Site {
 	return testSite{
-		h: hugo.NewInfo(),
+		h: hugo.NewInfo(hugo.EnvironmentProduction),
 		l: langs.NewLanguage("en", newTestConfig()),
 	}
 }

htesting/testdata_builder.go

@@ -0,0 +1,59 @@
+// 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 htesting
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/spf13/afero"
+)
+
+type testFile struct {
+	name    string
+	content string
+}
+
+type testdataBuilder struct {
+	t          testing.TB
+	fs         afero.Fs
+	workingDir string
+
+	files []testFile
+}
+
+func NewTestdataBuilder(fs afero.Fs, workingDir string, t testing.TB) *testdataBuilder {
+	workingDir = filepath.Clean(workingDir)
+	return &testdataBuilder{fs: fs, workingDir: workingDir, t: t}
+}
+
+func (b *testdataBuilder) Add(filename, content string) *testdataBuilder {
+	b.files = append(b.files, testFile{name: filename, content: content})
+	return b
+}
+
+func (b *testdataBuilder) Build() *testdataBuilder {
+	for _, f := range b.files {
+		if err := afero.WriteFile(b.fs, filepath.Join(b.workingDir, f.name), []byte(f.content), 0666); err != nil {
+			b.t.Fatalf("failed to add %q: %s", f.name, err)
+		}
+	}
+	return b
+}
+
+func (b testdataBuilder) WithWorkingDir(dir string) *testdataBuilder {
+	b.workingDir = filepath.Clean(dir)
+	b.files = make([]testFile, 0)
+	return &b
+}

hugolib/config.go

@@ -14,14 +14,19 @@
 package hugolib
 
 import (
-	"errors"
 	"fmt"
-	"io"
+
+	"os"
+	"path/filepath"
 	"strings"
 
-	"github.com/gohugoio/hugo/common/herrors"
+	"github.com/gohugoio/hugo/parser/metadecoders"
 
+	"github.com/gohugoio/hugo/common/herrors"
+	"github.com/gohugoio/hugo/common/hugo"
+	"github.com/gohugoio/hugo/hugofs"
 	"github.com/gohugoio/hugo/hugolib/paths"
+	"github.com/pkg/errors"
 	_errors "github.com/pkg/errors"
 
 	"github.com/gohugoio/hugo/langs"
@@ -65,96 +70,84 @@ func loadSiteConfig(cfg config.Provider) (scfg SiteConfig, err error) {
 type ConfigSourceDescriptor struct {
 	Fs afero.Fs
 
-	// Full path to the config file to use, i.e. /my/project/config.toml
+	// Path to the config file to use, e.g. /my/project/config.toml
 	Filename string
 
 	// The path to the directory to look for configuration. Is used if Filename is not
-	// set.
+	// set or if it is set to a relative filename.
 	Path string
 
 	// The project's working dir. Is used to look for additional theme config.
 	WorkingDir string
+
+	// The (optional) directory for additional configuration files.
+	AbsConfigDir string
+
+	// production, development
+	Environment string
 }
 
 func (d ConfigSourceDescriptor) configFilenames() []string {
+	if d.Filename == "" {
+		return []string{"config"}
+	}
 	return strings.Split(d.Filename, ",")
 }
 
+func (d ConfigSourceDescriptor) configFileDir() string {
+	if d.Path != "" {
+		return d.Path
+	}
+	return d.WorkingDir
+}
+
 // LoadConfigDefault is a convenience method to load the default "config.toml" config.
 func LoadConfigDefault(fs afero.Fs) (*viper.Viper, error) {
 	v, _, err := LoadConfig(ConfigSourceDescriptor{Fs: fs, Filename: "config.toml"})
 	return v, err
 }
 
-var ErrNoConfigFile = errors.New("Unable to locate Config file. Perhaps you need to create a new site.\n       Run `hugo help new` for details.\n")
+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")
 
 // LoadConfig loads Hugo configuration into a new Viper and then adds
 // a set of defaults.
 func LoadConfig(d ConfigSourceDescriptor, doWithConfig ...func(cfg config.Provider) error) (*viper.Viper, []string, error) {
+	if d.Environment == "" {
+		d.Environment = hugo.EnvironmentProduction
+	}
+
 	var configFiles []string
 
-	fs := d.Fs
 	v := viper.New()
-	v.SetFs(fs)
+	l := configLoader{ConfigSourceDescriptor: d}
 
-	if d.Path == "" {
-		d.Path = "."
-	}
-
-	configFilenames := d.configFilenames()
 	v.AutomaticEnv()
 	v.SetEnvPrefix("hugo")
-	v.SetConfigFile(configFilenames[0])
-	v.AddConfigPath(d.Path)
 
-	applyFileContext := func(filename string, err error) error {
-		err, _ = herrors.WithFileContextForFile(
-			err,
-			filename,
-			filename,
-			fs,
-			herrors.SimpleLineMatcher)
+	var cerr error
 
-		return err
+	for _, name := range d.configFilenames() {
+		var filename string
+		if filename, cerr = l.loadConfig(name, v); cerr != nil && cerr != ErrNoConfigFile {
+			return nil, nil, cerr
+		}
+		configFiles = append(configFiles, filename)
 	}
 
-	var configFileErr error
-
-	err := v.ReadInConfig()
-	if err != nil {
-		if _, ok := err.(viper.ConfigParseError); ok {
-			return nil, configFiles, applyFileContext(v.ConfigFileUsed(), err)
+	if d.AbsConfigDir != "" {
+		dirnames, err := l.loadConfigFromConfigDir(v)
+		if err == nil {
+			configFiles = append(configFiles, dirnames...)
 		}
-		configFileErr = ErrNoConfigFile
-	}
-
-	if configFileErr == nil {
-
-		if cf := v.ConfigFileUsed(); cf != "" {
-			configFiles = append(configFiles, cf)
-		}
-
-		for _, configFile := range configFilenames[1:] {
-			var r io.Reader
-			var err error
-			if r, err = fs.Open(configFile); err != nil {
-				return nil, configFiles, fmt.Errorf("Unable to open Config file.\n (%s)\n", err)
-			}
-			if err = v.MergeConfig(r); err != nil {
-				return nil, configFiles, applyFileContext(configFile, err)
-			}
-			configFiles = append(configFiles, configFile)
-		}
-
+		cerr = err
 	}
 
 	if err := loadDefaultSettingsFor(v); err != nil {
 		return v, configFiles, err
 	}
 
-	if configFileErr == nil {
-
-		themeConfigFiles, err := loadThemeConfig(d, v)
+	if cerr == nil {
+		themeConfigFiles, err := l.loadThemeConfig(v)
 		if err != nil {
 			return v, configFiles, err
 		}
@@ -176,10 +169,181 @@ func LoadConfig(d ConfigSourceDescriptor, doWithConfig ...func(cfg config.Provid
 		return v, configFiles, err
 	}
 
-	return v, configFiles, configFileErr
+	return v, configFiles, cerr
 
 }
 
+type configLoader struct {
+	ConfigSourceDescriptor
+}
+
+func (l configLoader) wrapFileInfoError(err error, fi os.FileInfo) error {
+	rfi, ok := fi.(hugofs.RealFilenameInfo)
+	if !ok {
+		return err
+	}
+	return l.wrapFileError(err, rfi.RealFilename())
+}
+
+func (l configLoader) loadConfig(configName string, v *viper.Viper) (string, error) {
+	baseDir := l.configFileDir()
+	var baseFilename string
+	if filepath.IsAbs(configName) {
+		baseFilename = configName
+	} else {
+		baseFilename = filepath.Join(baseDir, configName)
+	}
+
+	var filename string
+	fileExt := helpers.ExtNoDelimiter(configName)
+	if fileExt != "" {
+		exists, _ := helpers.Exists(baseFilename, l.Fs)
+		if exists {
+			filename = baseFilename
+		}
+	} else {
+		for _, ext := range []string{"toml", "yaml", "yml", "json"} {
+			filenameToCheck := baseFilename + "." + ext
+			exists, _ := helpers.Exists(filenameToCheck, l.Fs)
+			if exists {
+				filename = filenameToCheck
+				fileExt = ext
+				break
+			}
+		}
+	}
+
+	if filename == "" {
+		return "", ErrNoConfigFile
+	}
+
+	m, err := config.FromFileToMap(l.Fs, filename)
+	if err != nil {
+		return "", l.wrapFileError(err, filename)
+	}
+
+	if err = v.MergeConfigMap(m); err != nil {
+		return "", l.wrapFileError(err, filename)
+	}
+
+	return filename, nil
+
+}
+
+func (l configLoader) wrapFileError(err error, filename string) error {
+	err, _ = herrors.WithFileContextForFile(
+		err,
+		filename,
+		filename,
+		l.Fs,
+		herrors.SimpleLineMatcher)
+	return err
+}
+
+func (l configLoader) newRealBaseFs(path string) afero.Fs {
+	return hugofs.NewBasePathRealFilenameFs(afero.NewBasePathFs(l.Fs, path).(*afero.BasePathFs))
+
+}
+
+func (l configLoader) loadConfigFromConfigDir(v *viper.Viper) ([]string, error) {
+	sourceFs := l.Fs
+	configDir := l.AbsConfigDir
+
+	if _, err := sourceFs.Stat(configDir); err != nil {
+		// Config dir does not exist.
+		return nil, nil
+	}
+
+	defaultConfigDir := filepath.Join(configDir, "_default")
+	environmentConfigDir := filepath.Join(configDir, l.Environment)
+
+	var configDirs []string
+	// Merge from least to most specific.
+	for _, dir := range []string{defaultConfigDir, environmentConfigDir} {
+		if _, err := sourceFs.Stat(dir); err == nil {
+			configDirs = append(configDirs, dir)
+		}
+	}
+
+	if len(configDirs) == 0 {
+		return nil, nil
+	}
+
+	// Keep track of these so we can watch them for changes.
+	var dirnames []string
+
+	for _, configDir := range configDirs {
+		err := afero.Walk(sourceFs, configDir, func(path string, fi os.FileInfo, err error) error {
+			if fi == nil {
+				return nil
+			}
+
+			if fi.IsDir() {
+				dirnames = append(dirnames, path)
+				return nil
+			}
+
+			name := helpers.Filename(filepath.Base(path))
+
+			item, err := metadecoders.UnmarshalFileToMap(sourceFs, path)
+			if err != nil {
+				return l.wrapFileError(err, path)
+			}
+
+			var keyPath []string
+
+			if name != "config" {
+				// Can be params.jp, menus.en etc.
+				name, lang := helpers.FileAndExtNoDelimiter(name)
+
+				keyPath = []string{name}
+
+				if lang != "" {
+					keyPath = []string{"languages", lang}
+					switch name {
+					case "menu", "menus":
+						keyPath = append(keyPath, "menus")
+					case "params":
+						keyPath = append(keyPath, "params")
+					}
+				}
+			}
+
+			root := item
+			if len(keyPath) > 0 {
+				root = make(map[string]interface{})
+				m := root
+				for i, key := range keyPath {
+					if i >= len(keyPath)-1 {
+						m[key] = item
+					} else {
+						nm := make(map[string]interface{})
+						m[key] = nm
+						m = nm
+					}
+				}
+			}
+
+			// Migrate menu => menus etc.
+			config.RenameKeys(root)
+
+			if err := v.MergeConfigMap(root); err != nil {
+				return l.wrapFileError(err, path)
+			}
+
+			return nil
+
+		})
+
+		if err != nil {
+			return nil, err
+		}
+
+	}
+
+	return dirnames, nil
+}
+
 func loadLanguageSettings(cfg config.Provider, oldLangs langs.Languages) error {
 
 	defaultLang := cfg.GetString("defaultContentLanguage")
@@ -289,12 +453,11 @@ func loadLanguageSettings(cfg config.Provider, oldLangs langs.Languages) error {
 	return nil
 }
 
-func loadThemeConfig(d ConfigSourceDescriptor, v1 *viper.Viper) ([]string, error) {
-	themesDir := paths.AbsPathify(d.WorkingDir, v1.GetString("themesDir"))
+func (l configLoader) loadThemeConfig(v1 *viper.Viper) ([]string, error) {
+	themesDir := paths.AbsPathify(l.WorkingDir, v1.GetString("themesDir"))
 	themes := config.GetStringSlicePreserveString(v1, "theme")
 
-	//  CollectThemes(fs afero.Fs, themesDir string, themes []strin
-	themeConfigs, err := paths.CollectThemes(d.Fs, themesDir, themes)
+	themeConfigs, err := paths.CollectThemes(l.Fs, themesDir, themes)
 	if err != nil {
 		return nil, err
 	}
@@ -309,7 +472,7 @@ func loadThemeConfig(d ConfigSourceDescriptor, v1 *viper.Viper) ([]string, error
 	for _, tc := range themeConfigs {
 		if tc.ConfigFilename != "" {
 			configFilenames = append(configFilenames, tc.ConfigFilename)
-			if err := applyThemeConfig(v1, tc); err != nil {
+			if err := l.applyThemeConfig(v1, tc); err != nil {
 				return nil, err
 			}
 		}
@@ -319,18 +482,18 @@ func loadThemeConfig(d ConfigSourceDescriptor, v1 *viper.Viper) ([]string, error
 
 }
 
-func applyThemeConfig(v1 *viper.Viper, theme paths.ThemeConfig) error {
+func (l configLoader) applyThemeConfig(v1 *viper.Viper, theme paths.ThemeConfig) error {
 
 	const (
 		paramsKey    = "params"
 		languagesKey = "languages"
-		menuKey      = "menu"
+		menuKey      = "menus"
 	)
 
 	v2 := theme.Cfg
 
 	for _, key := range []string{paramsKey, "outputformats", "mediatypes"} {
-		mergeStringMapKeepLeft("", key, v1, v2)
+		l.mergeStringMapKeepLeft("", key, v1, v2)
 	}
 
 	themeLower := strings.ToLower(theme.Name)
@@ -348,7 +511,7 @@ func applyThemeConfig(v1 *viper.Viper, theme paths.ThemeConfig) error {
 		v1Langs := v1.GetStringMap(languagesKey)
 		for k := range v1Langs {
 			langParamsKey := languagesKey + "." + k + "." + paramsKey
-			mergeStringMapKeepLeft(paramsKey, langParamsKey, v1, v2)
+			l.mergeStringMapKeepLeft(paramsKey, langParamsKey, v1, v2)
 		}
 		v2Langs := v2.GetStringMap(languagesKey)
 		for k := range v2Langs {
@@ -378,7 +541,7 @@ func applyThemeConfig(v1 *viper.Viper, theme paths.ThemeConfig) error {
 	}
 
 	// Add menu definitions from theme not found in project
-	if v2.IsSet("menu") {
+	if v2.IsSet(menuKey) {
 		v2menus := v2.GetStringMap(menuKey)
 		for k, v := range v2menus {
 			menuEntry := menuKey + "." + k
@@ -392,7 +555,7 @@ func applyThemeConfig(v1 *viper.Viper, theme paths.ThemeConfig) error {
 
 }
 
-func mergeStringMapKeepLeft(rootKey, key string, v1, v2 config.Provider) {
+func (configLoader) mergeStringMapKeepLeft(rootKey, key string, v1, v2 config.Provider) {
 	if !v2.IsSet(key) {
 		return
 	}
@@ -440,6 +603,7 @@ func loadDefaultSettingsFor(v *viper.Viper) error {
 	v.SetDefault("buildDrafts", false)
 	v.SetDefault("buildFuture", false)
 	v.SetDefault("buildExpired", false)
+	v.SetDefault("environment", hugo.EnvironmentProduction)
 	v.SetDefault("uglyURLs", false)
 	v.SetDefault("verbose", false)
 	v.SetDefault("ignoreCache", false)

hugolib/config_test.go

@@ -247,8 +247,8 @@ map[string]interface {}{
 	b.AssertObject(`map[string]interface {}{
   "en": map[string]interface {}{
     "languagename": "English",
-    "menu": map[string]interface {}{
-      "theme": []interface {}{
+    "menus": map[string]interface {}{
+      "theme": []map[string]interface {}{
         map[string]interface {}{
           "name": "menu-lang-en-theme",
         },
@@ -265,8 +265,8 @@ map[string]interface {}{
   },
   "nb": map[string]interface {}{
     "languagename": "Norsk",
-    "menu": map[string]interface {}{
-      "theme": []interface {}{
+    "menus": map[string]interface {}{
+      "theme": []map[string]interface {}{
         map[string]interface {}{
           "name": "menu-lang-nb-theme",
         },
@@ -287,23 +287,23 @@ map[string]interface {}{
 
 	b.AssertObject(`
 map[string]interface {}{
-  "main": []interface {}{
+  "main": []map[string]interface {}{
     map[string]interface {}{
       "name": "menu-main-main",
     },
   },
-  "thememenu": []interface {}{
+  "thememenu": []map[string]interface {}{
     map[string]interface {}{
       "name": "menu-theme",
     },
   },
-  "top": []interface {}{
+  "top": []map[string]interface {}{
     map[string]interface {}{
       "name": "menu-top-main",
     },
   },
 }
-`, got["menu"])
+`, got["menus"])
 
 	assert.Equal("https://example.com/", got["baseurl"])
 

hugolib/configdir_test.go

@@ -0,0 +1,152 @@
+// 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 hugolib
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/gohugoio/hugo/common/herrors"
+
+	"github.com/gohugoio/hugo/htesting"
+	"github.com/spf13/afero"
+	"github.com/stretchr/testify/require"
+)
+
+func TestLoadConfigDir(t *testing.T) {
+	t.Parallel()
+
+	assert := require.New(t)
+
+	configContent := `
+baseURL = "https://example.org"
+paginagePath = "pag_root"
+
+[languages.en]
+weight = 0
+languageName = "English"
+
+[languages.no]
+weight = 10
+languageName = "FOO"
+
+[params]
+p1 = "p1_base"
+
+`
+
+	mm := afero.NewMemMapFs()
+
+	writeToFs(t, mm, "hugo.toml", configContent)
+
+	fb := htesting.NewTestdataBuilder(mm, "config/_default", t)
+
+	fb.Add("config.toml", `paginatePath = "pag_default"`)
+
+	fb.Add("params.yaml", `
+p2: "p2params_default"
+p3: "p3params_default"
+p4: "p4params_default"
+`)
+	fb.Add("menus.toml", `
+[[docs]]
+name = "About Hugo"
+weight = 1
+[[docs]]
+name = "Home"
+weight = 2
+	`)
+
+	fb.Add("menus.no.toml", `
+	[[docs]]
+	name = "Om Hugo"
+	weight = 1
+	`)
+
+	fb.Add("params.no.toml",
+		`
+p3 = "p3params_no_default"
+p4 = "p4params_no_default"`,
+	)
+	fb.Add("languages.no.toml", `languageName = "Norsk_no_default"`)
+
+	fb.Build()
+
+	fb = fb.WithWorkingDir("config/production")
+
+	fb.Add("config.toml", `paginatePath = "pag_production"`)
+
+	fb.Add("params.no.toml", `
+p2 = "p2params_no_production"
+p3 = "p3params_no_production"
+`)
+
+	fb.Build()
+
+	fb = fb.WithWorkingDir("config/development")
+
+	// This is set in all the config.toml variants above, but this will win.
+	fb.Add("config.toml", `paginatePath = "pag_development"`)
+
+	fb.Add("params.no.toml", `p3 = "p3params_no_development"`)
+	fb.Add("params.toml", `p3 = "p3params_development"`)
+
+	fb.Build()
+
+	cfg, _, err := LoadConfig(ConfigSourceDescriptor{Fs: mm, Environment: "development", Filename: "hugo.toml", AbsConfigDir: "config"})
+	assert.NoError(err)
+
+	assert.Equal("pag_development", cfg.GetString("paginatePath")) // /config/development/config.toml
+
+	assert.Equal(10, cfg.GetInt("languages.no.weight"))                          //  /config.toml
+	assert.Equal("Norsk_no_default", cfg.GetString("languages.no.languageName")) // /config/_default/languages.no.toml
+
+	assert.Equal("p1_base", cfg.GetString("params.p1"))
+	assert.Equal("p2params_default", cfg.GetString("params.p2")) // Is in both _default and production
+	assert.Equal("p3params_development", cfg.GetString("params.p3"))
+	assert.Equal("p3params_no_development", cfg.GetString("languages.no.params.p3"))
+
+	assert.Equal(2, len(cfg.Get("menus.docs").(([]map[string]interface{}))))
+	noMenus := cfg.Get("languages.no.menus.docs")
+	assert.NotNil(noMenus)
+	assert.Equal(1, len(noMenus.(([]map[string]interface{}))))
+
+}
+
+func TestLoadConfigDirError(t *testing.T) {
+	t.Parallel()
+
+	assert := require.New(t)
+
+	configContent := `
+baseURL = "https://example.org"
+
+`
+
+	mm := afero.NewMemMapFs()
+
+	writeToFs(t, mm, "hugo.toml", configContent)
+
+	fb := htesting.NewTestdataBuilder(mm, "config/development", t)
+
+	fb.Add("config.toml", `invalid & syntax`).Build()
+
+	_, _, err := LoadConfig(ConfigSourceDescriptor{Fs: mm, Environment: "development", Filename: "hugo.toml", AbsConfigDir: "config"})
+	assert.Error(err)
+
+	fe := herrors.UnwrapErrorWithFileContext(err)
+	assert.NotNil(fe)
+	assert.Equal(filepath.FromSlash("config/development/config.toml"), fe.Position().Filename)
+
+}

hugolib/hugo_sites.go

@@ -21,6 +21,8 @@ import (
 	"strings"
 	"sync"
 
+	"github.com/gohugoio/hugo/config"
+
 	"github.com/gohugoio/hugo/publisher"
 
 	"github.com/gohugoio/hugo/common/herrors"
@@ -361,14 +363,14 @@ func (h *HugoSites) resetLogs() {
 	}
 }
 
-func (h *HugoSites) createSitesFromConfig() error {
+func (h *HugoSites) createSitesFromConfig(cfg config.Provider) error {
 	oldLangs, _ := h.Cfg.Get("languagesSorted").(langs.Languages)
 
 	if err := loadLanguageSettings(h.Cfg, oldLangs); err != nil {
 		return err
 	}
 
-	depsCfg := deps.DepsCfg{Fs: h.Fs, Cfg: h.Cfg}
+	depsCfg := deps.DepsCfg{Fs: h.Fs, Cfg: cfg}
 
 	sites, err := createSitesFromConfig(depsCfg)
 
@@ -412,9 +414,9 @@ func (h *HugoSites) toSiteInfos() []*SiteInfo {
 type BuildCfg struct {
 	// Reset site state before build. Use to force full rebuilds.
 	ResetState bool
-	// Re-creates the sites from configuration before a build.
+	// If set, we re-create the sites from the given configuration before a build.
 	// This is needed if new languages are added.
-	CreateSitesFromConfig bool
+	NewConfig config.Provider
 	// Skip rendering. Useful for testing.
 	SkipRender bool
 	// Use this to indicate what changed (for rebuilds).

hugolib/hugo_sites_build.go

@@ -144,8 +144,8 @@ func (h *HugoSites) init(config *BuildCfg) error {
 		h.reset()
 	}
 
-	if config.CreateSitesFromConfig {
-		if err := h.createSitesFromConfig(); err != nil {
+	if config.NewConfig != nil {
+		if err := h.createSitesFromConfig(config.NewConfig); err != nil {
 			return err
 		}
 	}
@@ -154,8 +154,8 @@ func (h *HugoSites) init(config *BuildCfg) error {
 }
 
 func (h *HugoSites) initRebuild(config *BuildCfg) error {
-	if config.CreateSitesFromConfig {
-		return errors.New("Rebuild does not support 'CreateSitesFromConfig'.")
+	if config.NewConfig != nil {
+		return errors.New("Rebuild does not support 'NewConfig'.")
 	}
 
 	if config.ResetState {

hugolib/hugo_sites_build_test.go

@@ -11,14 +11,11 @@ import (
 	"path/filepath"
 	"time"
 
-	"github.com/gohugoio/hugo/langs"
-
 	"github.com/fortytw2/leaktest"
 	"github.com/fsnotify/fsnotify"
 	"github.com/gohugoio/hugo/helpers"
 	"github.com/gohugoio/hugo/hugofs"
 	"github.com/spf13/afero"
-	"github.com/spf13/viper"
 	"github.com/stretchr/testify/require"
 )
 
@@ -661,9 +658,8 @@ title = "Svenska"
 
 	sites := b.H
 
-	// Watching does not work with in-memory fs, so we trigger a reload manually
-	assert.NoError(sites.Cfg.(*langs.Language).Cfg.(*viper.Viper).ReadInConfig())
-	err := b.H.Build(BuildCfg{CreateSitesFromConfig: true})
+	assert.NoError(b.LoadConfig())
+	err := b.H.Build(BuildCfg{NewConfig: b.Cfg})
 
 	if err != nil {
 		t.Fatalf("Failed to rebuild sites: %s", err)
@@ -723,10 +719,9 @@ func TestChangeDefaultLanguage(t *testing.T) {
 		"DefaultContentLanguageInSubdir": false,
 	})
 
-	// Watching does not work with in-memory fs, so we trigger a reload manually
-	// This does not look pretty, so we should think of something else.
-	assert.NoError(b.H.Cfg.(*langs.Language).Cfg.(*viper.Viper).ReadInConfig())
-	err := b.H.Build(BuildCfg{CreateSitesFromConfig: true})
+	assert.NoError(b.LoadConfig())
+	err := b.H.Build(BuildCfg{NewConfig: b.Cfg})
+
 	if err != nil {
 		t.Fatalf("Failed to rebuild sites: %s", err)
 	}

hugolib/page.go

@@ -1647,7 +1647,12 @@ func (p *Page) Menus() PageMenus {
 	p.pageMenusInit.Do(func() {
 		p.pageMenus = PageMenus{}
 
-		if ms, ok := p.params["menu"]; ok {
+		ms, ok := p.params["menus"]
+		if !ok {
+			ms, ok = p.params["menu"]
+		}
+
+		if ok {
 			link := p.RelPermalink()
 
 			me := MenuEntry{Page: p, Name: p.LinkTitle(), Weight: p.Weight, URL: link}

hugolib/page_test.go

@@ -1436,7 +1436,7 @@ func TestIndexPageSimpleMethods(t *testing.T) {
 		{func(n *Page) bool { return n.IsNode() }},
 		{func(n *Page) bool { return !n.IsPage() }},
 		{func(n *Page) bool { return n.Scratch() != nil }},
-		{func(n *Page) bool { return n.Hugo().Version != "" }},
+		{func(n *Page) bool { return n.Hugo().Version() != "" }},
 	} {
 
 		n := s.newHomePage()

hugolib/paths/themes.go

@@ -20,7 +20,6 @@ import (
 	"github.com/gohugoio/hugo/config"
 	"github.com/spf13/afero"
 	"github.com/spf13/cast"
-	"github.com/spf13/viper"
 )
 
 type ThemeConfig struct {
@@ -73,18 +72,11 @@ func (c *themesCollector) add(name, configFilename string) (ThemeConfig, error)
 	var tc ThemeConfig
 
 	if configFilename != "" {
-		v := viper.New()
-		v.SetFs(c.fs)
-		v.AutomaticEnv()
-		v.SetEnvPrefix("hugo")
-		v.SetConfigFile(configFilename)
-
-		err := v.ReadInConfig()
+		var err error
+		cfg, err = config.FromFile(c.fs, configFilename)
 		if err != nil {
-			return tc, err
+			return tc, nil
 		}
-		cfg = v
-
 	}
 
 	tc = ThemeConfig{Name: name, ConfigFilename: configFilename, Cfg: cfg}

hugolib/site.go

@@ -1226,7 +1226,7 @@ func (s *Site) initializeSiteInfo() error {
 		Data:                           &s.Data,
 		owner:                          s.owner,
 		s:                              s,
-		hugoInfo:                       hugo.NewInfo(),
+		hugoInfo:                       hugo.NewInfo(s.Cfg.GetString("environment")),
 		// TODO(bep) make this Menu and similar into delegate methods on SiteInfo
 		Taxonomies: s.Taxonomies,
 	}
@@ -1370,7 +1370,7 @@ func (s *Site) getMenusFromConfig() Menus {
 
 	ret := Menus{}
 
-	if menus := s.Language.GetStringMap("menu"); menus != nil {
+	if menus := s.Language.GetStringMap("menus"); menus != nil {
 		for name, menu := range menus {
 			m, err := cast.ToSliceE(menu)
 			if err != nil {

hugolib/testhelpers_test.go

@@ -322,6 +322,15 @@ func (s *sitesBuilder) CreateSites() *sitesBuilder {
 	return s
 }
 
+func (s *sitesBuilder) LoadConfig() error {
+	cfg, _, err := LoadConfig(ConfigSourceDescriptor{Fs: s.Fs.Source, Filename: "config." + s.configFormat})
+	if err != nil {
+		return err
+	}
+	s.Cfg = cfg
+	return nil
+}
+
 func (s *sitesBuilder) CreateSitesE() error {
 	s.addDefaults()
 	s.writeFilePairs("content", s.contentFilePairs)
@@ -334,18 +343,9 @@ func (s *sitesBuilder) CreateSitesE() error {
 	s.writeFilePairs("i18n", s.i18nFilePairsAdded)
 
 	if s.Cfg == nil {
-		cfg, _, err := LoadConfig(ConfigSourceDescriptor{Fs: s.Fs.Source, Filename: "config." + s.configFormat})
-		if err != nil {
+		if err := s.LoadConfig(); err != nil {
 			return err
 		}
-		// TODO(bep)
-		/*		expectedConfigs := 1
-				if s.theme != "" {
-					expectedConfigs = 2
-				}
-				require.Equal(s.T, expectedConfigs, len(configFiles), fmt.Sprintf("Configs: %v", configFiles))
-		*/
-		s.Cfg = cfg
 	}
 
 	sites, err := NewHugoSites(deps.DepsCfg{Fs: s.Fs, Cfg: s.Cfg, Logger: s.logger, Running: s.running})

magefile.go

@@ -21,10 +21,10 @@ import (
 
 const (
 	packageName  = "github.com/gohugoio/hugo"
-	noGitLdflags = "-X $PACKAGE/common/hugo.BuildDate=$BUILD_DATE"
+	noGitLdflags = "-X $PACKAGE/common/hugo.buildDate=$BUILD_DATE"
 )
 
-var ldflags = "-X $PACKAGE/common/hugo.CommitHash=$COMMIT_HASH -X $PACKAGE/common/hugo.BuildDate=$BUILD_DATE"
+var ldflags = "-X $PACKAGE/common/hugo.commitHash=$COMMIT_HASH -X $PACKAGE/common/hugo.buildDate=$BUILD_DATE"
 
 // allow user to override go executable by running as GOEXE=xxx make ... on unix-like systems
 var goexe = "go"

parser/metadecoders/decoder.go

@@ -22,6 +22,7 @@ import (
 	"github.com/BurntSushi/toml"
 	"github.com/chaseadamsio/goorgeous"
 	"github.com/pkg/errors"
+	"github.com/spf13/afero"
 	"github.com/spf13/cast"
 	yaml "gopkg.in/yaml.v2"
 )
@@ -37,7 +38,21 @@ func UnmarshalToMap(data []byte, f Format) (map[string]interface{}, error) {
 	err := unmarshal(data, f, &m)
 
 	return m, err
+}
 
+// UnmarshalFileToMap is the same as UnmarshalToMap, but reads the data from
+// the given filename.
+func UnmarshalFileToMap(fs afero.Fs, filename string) (map[string]interface{}, error) {
+	format := FormatFromString(filename)
+	if format == "" {
+		return nil, errors.Errorf("%q is not a valid configuration format", filename)
+	}
+
+	data, err := afero.ReadFile(fs, filename)
+	if err != nil {
+		return nil, err
+	}
+	return UnmarshalToMap(data, format)
 }
 
 // Unmarshal will unmarshall data in format f into an interface{}.

parser/metadecoders/format.go

@@ -14,6 +14,7 @@
 package metadecoders
 
 import (
+	"path/filepath"
 	"strings"
 
 	"github.com/gohugoio/hugo/parser/pageparser"
@@ -34,6 +35,11 @@ const (
 // into a Format. It returns an empty string for unknown formats.
 func FormatFromString(formatStr string) Format {
 	formatStr = strings.ToLower(formatStr)
+	if strings.Contains(formatStr, ".") {
+		// Assume a filename
+		formatStr = strings.TrimPrefix(filepath.Ext(formatStr), ".")
+
+	}
 	switch formatStr {
 	case "yaml", "yml":
 		return YAML

parser/metadecoders/format_test.go

@@ -32,6 +32,7 @@ func TestFormatFromString(t *testing.T) {
 		{"yaml", YAML},
 		{"yml", YAML},
 		{"toml", TOML},
+		{"config.toml", TOML},
 		{"tOMl", TOML},
 		{"org", ORG},
 		{"foo", ""},