hugo/hugofs/decorators.go
Bjørn Erik Pedersen eada236f87
Introduce a tree map for all content
This commit introduces a new data structure to store pages and their resources.

This data structure is backed by radix trees.

This simplies tree operations, makes all pages a bundle,  and paves the way for #6310.

It also solves a set of annoying issues (see list below).

Not a motivation behind this, but this commit also makes Hugo in general a little bit faster and more memory effective (see benchmarks). Especially for partial rebuilds on content edits, but also when taxonomies is in use.

```
name                                   old time/op    new time/op    delta
SiteNew/Bundle_with_image/Edit-16        1.32ms ± 8%    1.00ms ± 9%  -24.42%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file/Edit-16    1.28ms ± 0%    0.94ms ± 0%  -26.26%  (p=0.029 n=4+4)
SiteNew/Tags_and_categories/Edit-16      33.9ms ± 2%    21.8ms ± 1%  -35.67%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs/Edit-16            40.6ms ± 1%    37.7ms ± 3%   -7.20%  (p=0.029 n=4+4)
SiteNew/Deep_content_tree/Edit-16        56.7ms ± 0%    51.7ms ± 1%   -8.82%  (p=0.029 n=4+4)
SiteNew/Many_HTML_templates/Edit-16      19.9ms ± 2%    18.3ms ± 3%   -7.64%  (p=0.029 n=4+4)
SiteNew/Page_collections/Edit-16         37.9ms ± 4%    34.0ms ± 2%  -10.28%  (p=0.029 n=4+4)
SiteNew/Bundle_with_image-16             10.7ms ± 0%    10.6ms ± 0%   -1.15%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file-16         10.8ms ± 0%    10.7ms ± 0%   -1.05%  (p=0.029 n=4+4)
SiteNew/Tags_and_categories-16           43.2ms ± 1%    39.6ms ± 1%   -8.35%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs-16                 47.6ms ± 1%    47.3ms ± 0%     ~     (p=0.057 n=4+4)
SiteNew/Deep_content_tree-16             73.0ms ± 1%    74.2ms ± 1%     ~     (p=0.114 n=4+4)
SiteNew/Many_HTML_templates-16           37.9ms ± 0%    38.1ms ± 1%     ~     (p=0.114 n=4+4)
SiteNew/Page_collections-16              53.6ms ± 1%    54.7ms ± 1%   +2.09%  (p=0.029 n=4+4)

name                                   old alloc/op   new alloc/op   delta
SiteNew/Bundle_with_image/Edit-16         486kB ± 0%     430kB ± 0%  -11.47%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file/Edit-16     265kB ± 0%     209kB ± 0%  -21.06%  (p=0.029 n=4+4)
SiteNew/Tags_and_categories/Edit-16      13.6MB ± 0%     8.8MB ± 0%  -34.93%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs/Edit-16            66.5MB ± 0%    63.9MB ± 0%   -3.95%  (p=0.029 n=4+4)
SiteNew/Deep_content_tree/Edit-16        28.8MB ± 0%    25.8MB ± 0%  -10.55%  (p=0.029 n=4+4)
SiteNew/Many_HTML_templates/Edit-16      6.16MB ± 0%    5.56MB ± 0%   -9.86%  (p=0.029 n=4+4)
SiteNew/Page_collections/Edit-16         16.9MB ± 0%    16.0MB ± 0%   -5.19%  (p=0.029 n=4+4)
SiteNew/Bundle_with_image-16             2.28MB ± 0%    2.29MB ± 0%   +0.35%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file-16         2.07MB ± 0%    2.07MB ± 0%     ~     (p=0.114 n=4+4)
SiteNew/Tags_and_categories-16           14.3MB ± 0%    13.2MB ± 0%   -7.30%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs-16                 69.1MB ± 0%    69.0MB ± 0%     ~     (p=0.343 n=4+4)
SiteNew/Deep_content_tree-16             31.3MB ± 0%    31.8MB ± 0%   +1.49%  (p=0.029 n=4+4)
SiteNew/Many_HTML_templates-16           10.8MB ± 0%    10.9MB ± 0%   +1.11%  (p=0.029 n=4+4)
SiteNew/Page_collections-16              21.4MB ± 0%    21.6MB ± 0%   +1.15%  (p=0.029 n=4+4)

name                                   old allocs/op  new allocs/op  delta
SiteNew/Bundle_with_image/Edit-16         4.74k ± 0%     3.86k ± 0%  -18.57%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file/Edit-16     4.73k ± 0%     3.85k ± 0%  -18.58%  (p=0.029 n=4+4)
SiteNew/Tags_and_categories/Edit-16        301k ± 0%      198k ± 0%  -34.14%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs/Edit-16              389k ± 0%      373k ± 0%   -4.07%  (p=0.029 n=4+4)
SiteNew/Deep_content_tree/Edit-16          338k ± 0%      262k ± 0%  -22.63%  (p=0.029 n=4+4)
SiteNew/Many_HTML_templates/Edit-16        102k ± 0%       88k ± 0%  -13.81%  (p=0.029 n=4+4)
SiteNew/Page_collections/Edit-16           176k ± 0%      152k ± 0%  -13.32%  (p=0.029 n=4+4)
SiteNew/Bundle_with_image-16              26.8k ± 0%     26.8k ± 0%   +0.05%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file-16          26.8k ± 0%     26.8k ± 0%   +0.05%  (p=0.029 n=4+4)
SiteNew/Tags_and_categories-16             273k ± 0%      245k ± 0%  -10.36%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs-16                   396k ± 0%      398k ± 0%   +0.39%  (p=0.029 n=4+4)
SiteNew/Deep_content_tree-16               317k ± 0%      325k ± 0%   +2.53%  (p=0.029 n=4+4)
SiteNew/Many_HTML_templates-16             146k ± 0%      147k ± 0%   +0.98%  (p=0.029 n=4+4)
SiteNew/Page_collections-16                210k ± 0%      215k ± 0%   +2.44%  (p=0.029 n=4+4)
```

Fixes #6312
Fixes #6087
Fixes #6738
Fixes #6412
Fixes #6743
Fixes #6875
Fixes #6034
Fixes #6902
Fixes #6173
Fixes #6590
2020-02-18 09:49:42 +01:00

237 lines
5.2 KiB
Go

// Copyright 2019 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 hugofs
import (
"os"
"path/filepath"
"strings"
"github.com/pkg/errors"
"github.com/spf13/afero"
)
func decorateDirs(fs afero.Fs, meta FileMeta) afero.Fs {
ffs := &baseFileDecoratorFs{Fs: fs}
decorator := func(fi os.FileInfo, name string) (os.FileInfo, error) {
if !fi.IsDir() {
// Leave regular files as they are.
return fi, nil
}
return decorateFileInfo(fi, fs, nil, "", "", meta), nil
}
ffs.decorate = decorator
return ffs
}
func decoratePath(fs afero.Fs, createPath func(name string) string) afero.Fs {
ffs := &baseFileDecoratorFs{Fs: fs}
decorator := func(fi os.FileInfo, name string) (os.FileInfo, error) {
path := createPath(name)
return decorateFileInfo(fi, fs, nil, "", path, nil), nil
}
ffs.decorate = decorator
return ffs
}
// DecorateBasePathFs adds Path info to files and directories in the
// provided BasePathFs, using the base as base.
func DecorateBasePathFs(base *afero.BasePathFs) afero.Fs {
basePath, _ := base.RealPath("")
if !strings.HasSuffix(basePath, filepathSeparator) {
basePath += filepathSeparator
}
ffs := &baseFileDecoratorFs{Fs: base}
decorator := func(fi os.FileInfo, name string) (os.FileInfo, error) {
path := strings.TrimPrefix(name, basePath)
return decorateFileInfo(fi, base, nil, "", path, nil), nil
}
ffs.decorate = decorator
return ffs
}
// NewBaseFileDecorator decorates the given Fs to provide the real filename
// and an Opener func.
func NewBaseFileDecorator(fs afero.Fs, callbacks ...func(fi FileMetaInfo)) afero.Fs {
ffs := &baseFileDecoratorFs{Fs: fs}
decorator := func(fi os.FileInfo, filename string) (os.FileInfo, error) {
// Store away the original in case it's a symlink.
meta := FileMeta{metaKeyName: fi.Name()}
if fi.IsDir() {
meta[metaKeyJoinStat] = func(name string) (FileMetaInfo, error) {
joinedFilename := filepath.Join(filename, name)
fi, _, err := lstatIfPossible(fs, joinedFilename)
if err != nil {
return nil, err
}
fi, err = ffs.decorate(fi, joinedFilename)
if err != nil {
return nil, err
}
return fi.(FileMetaInfo), nil
}
}
isSymlink := isSymlink(fi)
if isSymlink {
meta[metaKeyOriginalFilename] = filename
var link string
var err error
link, fi, err = evalSymlinks(fs, filename)
if err != nil {
return nil, err
}
filename = link
meta[metaKeyIsSymlink] = true
}
opener := func() (afero.File, error) {
return ffs.open(filename)
}
fim := decorateFileInfo(fi, ffs, opener, filename, "", meta)
for _, cb := range callbacks {
cb(fim)
}
return fim, nil
}
ffs.decorate = decorator
return ffs
}
func evalSymlinks(fs afero.Fs, filename string) (string, os.FileInfo, error) {
link, err := filepath.EvalSymlinks(filename)
if err != nil {
return "", nil, err
}
fi, err := fs.Stat(link)
if err != nil {
return "", nil, err
}
return link, fi, nil
}
type baseFileDecoratorFs struct {
afero.Fs
decorate func(fi os.FileInfo, filename string) (os.FileInfo, error)
}
func (fs *baseFileDecoratorFs) Stat(name string) (os.FileInfo, error) {
fi, err := fs.Fs.Stat(name)
if err != nil {
return nil, err
}
return fs.decorate(fi, name)
}
func (fs *baseFileDecoratorFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
var (
fi os.FileInfo
err error
ok bool
)
if lstater, isLstater := fs.Fs.(afero.Lstater); isLstater {
fi, ok, err = lstater.LstatIfPossible(name)
} else {
fi, err = fs.Fs.Stat(name)
}
if err != nil {
return nil, false, err
}
fi, err = fs.decorate(fi, name)
return fi, ok, err
}
func (fs *baseFileDecoratorFs) Open(name string) (afero.File, error) {
return fs.open(name)
}
func (fs *baseFileDecoratorFs) open(name string) (afero.File, error) {
f, err := fs.Fs.Open(name)
if err != nil {
return nil, err
}
return &baseFileDecoratorFile{File: f, fs: fs}, nil
}
type baseFileDecoratorFile struct {
afero.File
fs *baseFileDecoratorFs
}
func (l *baseFileDecoratorFile) Readdir(c int) (ofi []os.FileInfo, err error) {
dirnames, err := l.File.Readdirnames(c)
if err != nil {
return nil, err
}
fisp := make([]os.FileInfo, 0, len(dirnames))
for _, dirname := range dirnames {
filename := dirname
if l.Name() != "" && l.Name() != filepathSeparator {
filename = filepath.Join(l.Name(), dirname)
}
// We need to resolve any symlink info.
fi, _, err := lstatIfPossible(l.fs.Fs, filename)
if err != nil {
if os.IsNotExist(err) {
continue
}
return nil, err
}
fi, err = l.fs.decorate(fi, filename)
if err != nil {
return nil, errors.Wrap(err, "decorate")
}
fisp = append(fisp, fi)
}
return fisp, err
}