mirror of https://github.com/gohugoio/hugo
155 lines
3.5 KiB
Go
155 lines
3.5 KiB
Go
// Copyright 2019 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package hugofs
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import (
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"fmt"
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"io/fs"
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"os"
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"path/filepath"
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"github.com/spf13/afero"
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)
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var _ FilesystemUnwrapper = (*baseFileDecoratorFs)(nil)
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func decorateDirs(fs afero.Fs, meta *FileMeta) afero.Fs {
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ffs := &baseFileDecoratorFs{Fs: fs}
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decorator := func(fi FileNameIsDir, name string) (FileNameIsDir, error) {
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if !fi.IsDir() {
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// Leave regular files as they are.
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return fi, nil
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}
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return decorateFileInfo(fi, nil, "", meta), nil
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}
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ffs.decorate = decorator
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return ffs
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}
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// NewBaseFileDecorator decorates the given Fs to provide the real filename
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// and an Opener func.
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func NewBaseFileDecorator(fs afero.Fs, callbacks ...func(fi FileMetaInfo)) afero.Fs {
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ffs := &baseFileDecoratorFs{Fs: fs}
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decorator := func(fi FileNameIsDir, filename string) (FileNameIsDir, error) {
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// Store away the original in case it's a symlink.
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meta := NewFileMeta()
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meta.Name = fi.Name()
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if fi.IsDir() {
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meta.JoinStatFunc = func(name string) (FileMetaInfo, error) {
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joinedFilename := filepath.Join(filename, name)
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fi, err := fs.Stat(joinedFilename)
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if err != nil {
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return nil, err
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}
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fim, err := ffs.decorate(fi, joinedFilename)
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if err != nil {
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return nil, err
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}
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return fim.(FileMetaInfo), nil
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}
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}
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opener := func() (afero.File, error) {
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return ffs.open(filename)
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}
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fim := decorateFileInfo(fi, opener, filename, meta)
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for _, cb := range callbacks {
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cb(fim)
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}
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return fim, nil
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}
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ffs.decorate = decorator
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return ffs
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}
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type baseFileDecoratorFs struct {
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afero.Fs
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decorate func(fi FileNameIsDir, name string) (FileNameIsDir, error)
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}
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func (fs *baseFileDecoratorFs) UnwrapFilesystem() afero.Fs {
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return fs.Fs
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}
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func (fs *baseFileDecoratorFs) Stat(name string) (os.FileInfo, error) {
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fi, err := fs.Fs.Stat(name)
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if err != nil {
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return nil, err
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}
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fim, err := fs.decorate(fi, name)
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if err != nil {
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return nil, err
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}
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return fim.(os.FileInfo), nil
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}
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func (fs *baseFileDecoratorFs) Open(name string) (afero.File, error) {
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return fs.open(name)
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}
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func (fs *baseFileDecoratorFs) open(name string) (afero.File, error) {
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f, err := fs.Fs.Open(name)
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if err != nil {
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return nil, err
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}
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return &baseFileDecoratorFile{File: f, fs: fs}, nil
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}
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type baseFileDecoratorFile struct {
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afero.File
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fs *baseFileDecoratorFs
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}
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func (l *baseFileDecoratorFile) ReadDir(n int) ([]fs.DirEntry, error) {
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fis, err := l.File.(fs.ReadDirFile).ReadDir(-1)
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if err != nil {
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return nil, err
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}
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fisp := make([]fs.DirEntry, len(fis))
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for i, fi := range fis {
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filename := fi.Name()
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if l.Name() != "" {
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filename = filepath.Join(l.Name(), fi.Name())
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}
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fid, err := l.fs.decorate(fi, filename)
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if err != nil {
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return nil, fmt.Errorf("decorate: %w", err)
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}
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fisp[i] = fid.(fs.DirEntry)
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}
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return fisp, err
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}
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func (l *baseFileDecoratorFile) Readdir(c int) (ofi []os.FileInfo, err error) {
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panic("not supported: Use ReadDir")
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}
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