ref: ae63c2b5c94f68fbabd5dbd821630e747e8959a4
dir: /hugofs/fileinfo.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 provides the file systems used by Hugo.
package hugofs
import (
"os"
"path/filepath"
"runtime"
"sort"
"strings"
"time"
"github.com/gohugoio/hugo/hugofs/files"
"golang.org/x/text/unicode/norm"
"github.com/pkg/errors"
"github.com/spf13/cast"
"github.com/gohugoio/hugo/common/hreflect"
"github.com/spf13/afero"
)
const (
metaKeyFilename = "filename"
metaKeyBaseDir = "baseDir" // Abs base directory of source file.
metaKeyMountRoot = "mountRoot"
metaKeyModule = "module"
metaKeyOriginalFilename = "originalFilename"
metaKeyName = "name"
metaKeyPath = "path"
metaKeyPathWalk = "pathWalk"
metaKeyLang = "lang"
metaKeyWeight = "weight"
metaKeyOrdinal = "ordinal"
metaKeyFs = "fs"
metaKeyOpener = "opener"
metaKeyIsOrdered = "isOrdered"
metaKeyIsSymlink = "isSymlink"
metaKeyJoinStat = "joinStat"
metaKeySkipDir = "skipDir"
metaKeyClassifier = "classifier"
metaKeyTranslationBaseName = "translationBaseName"
metaKeyTranslationBaseNameWithExt = "translationBaseNameWithExt"
metaKeyTranslations = "translations"
metaKeyDecoraterPath = "decoratorPath"
)
type FileMeta map[string]interface{}
func (f FileMeta) GetInt(key string) int {
return cast.ToInt(f[key])
}
func (f FileMeta) GetString(key string) string {
return cast.ToString(f[key])
}
func (f FileMeta) GetBool(key string) bool {
return cast.ToBool(f[key])
}
func (f FileMeta) Filename() string {
return f.stringV(metaKeyFilename)
}
func (f FileMeta) OriginalFilename() string {
return f.stringV(metaKeyOriginalFilename)
}
func (f FileMeta) SkipDir() bool {
return f.GetBool(metaKeySkipDir)
}
func (f FileMeta) TranslationBaseName() string {
return f.stringV(metaKeyTranslationBaseName)
}
func (f FileMeta) TranslationBaseNameWithExt() string {
return f.stringV(metaKeyTranslationBaseNameWithExt)
}
func (f FileMeta) Translations() []string {
return cast.ToStringSlice(f[metaKeyTranslations])
}
func (f FileMeta) Name() string {
return f.stringV(metaKeyName)
}
func (f FileMeta) Classifier() files.ContentClass {
c, found := f[metaKeyClassifier]
if found {
return c.(files.ContentClass)
}
return files.ContentClassFile // For sorting
}
func (f FileMeta) Lang() string {
return f.stringV(metaKeyLang)
}
// Path returns the relative file path to where this file is mounted.
func (f FileMeta) Path() string {
return f.stringV(metaKeyPath)
}
// PathFile returns the relative file path for the file source.
func (f FileMeta) PathFile() string {
base := f.stringV(metaKeyBaseDir)
if base == "" {
return ""
}
return strings.TrimPrefix(strings.TrimPrefix(f.Filename(), base), filepathSeparator)
}
func (f FileMeta) MountRoot() string {
return f.stringV(metaKeyMountRoot)
}
func (f FileMeta) Module() string {
return f.stringV(metaKeyModule)
}
func (f FileMeta) Weight() int {
return f.GetInt(metaKeyWeight)
}
func (f FileMeta) Ordinal() int {
return f.GetInt(metaKeyOrdinal)
}
func (f FileMeta) IsOrdered() bool {
return f.GetBool(metaKeyIsOrdered)
}
// IsSymlink returns whether this comes from a symlinked file or directory.
func (f FileMeta) IsSymlink() bool {
return f.GetBool(metaKeyIsSymlink)
}
func (f FileMeta) Watch() bool {
if v, found := f["watch"]; found {
return v.(bool)
}
return false
}
func (f FileMeta) Fs() afero.Fs {
if v, found := f[metaKeyFs]; found {
return v.(afero.Fs)
}
return nil
}
func (f FileMeta) GetOpener() func() (afero.File, error) {
o, found := f[metaKeyOpener]
if !found {
return nil
}
return o.(func() (afero.File, error))
}
func (f FileMeta) Open() (afero.File, error) {
v, found := f[metaKeyOpener]
if !found {
return nil, errors.New("file opener not found")
}
return v.(func() (afero.File, error))()
}
func (f FileMeta) JoinStat(name string) (FileMetaInfo, error) {
v, found := f[metaKeyJoinStat]
if !found {
return nil, os.ErrNotExist
}
return v.(func(name string) (FileMetaInfo, error))(name)
}
func (f FileMeta) stringV(key string) string {
if v, found := f[key]; found {
return v.(string)
}
return ""
}
func (f FileMeta) setIfNotZero(key string, val interface{}) {
if !hreflect.IsTruthful(val) {
return
}
f[key] = val
}
type FileMetaInfo interface {
os.FileInfo
Meta() FileMeta
}
type fileInfoMeta struct {
os.FileInfo
m FileMeta
}
// Name returns the file's name. Note that we follow symlinks,
// if supported by the file system, and the Name given here will be the
// name of the symlink, which is what Hugo needs in all situations.
func (fi *fileInfoMeta) Name() string {
if name := fi.m.Name(); name != "" {
return name
}
return fi.FileInfo.Name()
}
func (fi *fileInfoMeta) Meta() FileMeta {
return fi.m
}
func NewFileMetaInfo(fi os.FileInfo, m FileMeta) FileMetaInfo {
if fim, ok := fi.(FileMetaInfo); ok {
mergeFileMeta(fim.Meta(), m)
}
return &fileInfoMeta{FileInfo: fi, m: m}
}
func copyFileMeta(m FileMeta) FileMeta {
c := make(FileMeta)
for k, v := range m {
c[k] = v
}
return c
}
// Merge metadata, last entry wins.
func mergeFileMeta(from, to FileMeta) {
if from == nil {
return
}
for k, v := range from {
if _, found := to[k]; !found {
to[k] = v
}
}
}
type dirNameOnlyFileInfo struct {
name string
}
func (fi *dirNameOnlyFileInfo) Name() string {
return fi.name
}
func (fi *dirNameOnlyFileInfo) Size() int64 {
panic("not implemented")
}
func (fi *dirNameOnlyFileInfo) Mode() os.FileMode {
return os.ModeDir
}
func (fi *dirNameOnlyFileInfo) ModTime() time.Time {
return time.Time{}
}
func (fi *dirNameOnlyFileInfo) IsDir() bool {
return true
}
func (fi *dirNameOnlyFileInfo) Sys() interface{} {
return nil
}
func newDirNameOnlyFileInfo(name string, meta FileMeta, fileOpener func() (afero.File, error)) FileMetaInfo {
name = normalizeFilename(name)
_, base := filepath.Split(name)
m := copyFileMeta(meta)
if _, found := m[metaKeyFilename]; !found {
m.setIfNotZero(metaKeyFilename, name)
}
m[metaKeyOpener] = fileOpener
m[metaKeyIsOrdered] = false
return NewFileMetaInfo(
&dirNameOnlyFileInfo{name: base},
m,
)
}
func decorateFileInfo(
fi os.FileInfo,
fs afero.Fs, opener func() (afero.File, error),
filename, filepath string, inMeta FileMeta) FileMetaInfo {
var meta FileMeta
var fim FileMetaInfo
filepath = strings.TrimPrefix(filepath, filepathSeparator)
var ok bool
if fim, ok = fi.(FileMetaInfo); ok {
meta = fim.Meta()
} else {
meta = make(FileMeta)
fim = NewFileMetaInfo(fi, meta)
}
meta.setIfNotZero(metaKeyOpener, opener)
meta.setIfNotZero(metaKeyFs, fs)
meta.setIfNotZero(metaKeyPath, normalizeFilename(filepath))
meta.setIfNotZero(metaKeyFilename, normalizeFilename(filename))
mergeFileMeta(inMeta, meta)
return fim
}
func isSymlink(fi os.FileInfo) bool {
return fi != nil && fi.Mode()&os.ModeSymlink == os.ModeSymlink
}
func fileInfosToFileMetaInfos(fis []os.FileInfo) []FileMetaInfo {
fims := make([]FileMetaInfo, len(fis))
for i, v := range fis {
fims[i] = v.(FileMetaInfo)
}
return fims
}
func normalizeFilename(filename string) string {
if filename == "" {
return ""
}
if runtime.GOOS == "darwin" {
// When a file system is HFS+, its filepath is in NFD form.
return norm.NFC.String(filename)
}
return filename
}
func fileInfosToNames(fis []os.FileInfo) []string {
names := make([]string, len(fis))
for i, d := range fis {
names[i] = d.Name()
}
return names
}
func fromSlash(filenames []string) []string {
for i, name := range filenames {
filenames[i] = filepath.FromSlash(name)
}
return filenames
}
func sortFileInfos(fis []os.FileInfo) {
sort.Slice(fis, func(i, j int) bool {
fimi, fimj := fis[i].(FileMetaInfo), fis[j].(FileMetaInfo)
return fimi.Meta().Filename() < fimj.Meta().Filename()
})
}