hugo filename_filter_fs 源码
hugo filename_filter_fs 代码
文件路径:/hugofs/filename_filter_fs.go
// Copyright 2021 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"
"strings"
"syscall"
"time"
"github.com/gohugoio/hugo/hugofs/glob"
"github.com/spf13/afero"
)
var (
_ FilesystemUnwrapper = (*filenameFilterFs)(nil)
)
func newFilenameFilterFs(fs afero.Fs, base string, filter *glob.FilenameFilter) afero.Fs {
return &filenameFilterFs{
fs: fs,
base: base,
filter: filter,
}
}
// filenameFilterFs is a filesystem that filters by filename.
type filenameFilterFs struct {
base string
fs afero.Fs
filter *glob.FilenameFilter
}
func (fs *filenameFilterFs) UnwrapFilesystem() afero.Fs {
return fs.fs
}
func (fs *filenameFilterFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
fi, b, err := fs.fs.(afero.Lstater).LstatIfPossible(name)
if err != nil {
return nil, false, err
}
if !fs.filter.Match(name, fi.IsDir()) {
return nil, false, os.ErrNotExist
}
return fi, b, nil
}
func (fs *filenameFilterFs) Open(name string) (afero.File, error) {
fi, err := fs.fs.Stat(name)
if err != nil {
return nil, err
}
if !fs.filter.Match(name, fi.IsDir()) {
return nil, os.ErrNotExist
}
f, err := fs.fs.Open(name)
if err != nil {
return nil, err
}
if !fi.IsDir() {
return f, nil
}
return &filenameFilterDir{
File: f,
base: fs.base,
filter: fs.filter,
}, nil
}
func (fs *filenameFilterFs) OpenFile(name string, flag int, perm os.FileMode) (afero.File, error) {
return fs.Open(name)
}
func (fs *filenameFilterFs) Stat(name string) (os.FileInfo, error) {
fi, _, err := fs.LstatIfPossible(name)
return fi, err
}
func (fs *filenameFilterFs) getOpener(name string) func() (afero.File, error) {
return func() (afero.File, error) {
return fs.Open(name)
}
}
type filenameFilterDir struct {
afero.File
base string
filter *glob.FilenameFilter
}
func (f *filenameFilterDir) Readdir(count int) ([]os.FileInfo, error) {
fis, err := f.File.Readdir(-1)
if err != nil {
return nil, err
}
var result []os.FileInfo
for _, fi := range fis {
fim := fi.(FileMetaInfo)
if f.filter.Match(strings.TrimPrefix(fim.Meta().Filename, f.base), fim.IsDir()) {
result = append(result, fi)
}
}
return result, nil
}
func (f *filenameFilterDir) Readdirnames(count int) ([]string, error) {
dirsi, err := f.Readdir(count)
if err != nil {
return nil, err
}
dirs := make([]string, len(dirsi))
for i, d := range dirsi {
dirs[i] = d.Name()
}
return dirs, nil
}
func (fs *filenameFilterFs) Chmod(n string, m os.FileMode) error {
return syscall.EPERM
}
func (fs *filenameFilterFs) Chtimes(n string, a, m time.Time) error {
return syscall.EPERM
}
func (fs *filenameFilterFs) Chown(n string, uid, gid int) error {
return syscall.EPERM
}
func (fs *filenameFilterFs) ReadDir(name string) ([]os.FileInfo, error) {
panic("not implemented")
}
func (fs *filenameFilterFs) Remove(n string) error {
return syscall.EPERM
}
func (fs *filenameFilterFs) RemoveAll(p string) error {
return syscall.EPERM
}
func (fs *filenameFilterFs) Rename(o, n string) error {
return syscall.EPERM
}
func (fs *filenameFilterFs) Create(n string) (afero.File, error) {
return nil, syscall.EPERM
}
func (fs *filenameFilterFs) Name() string {
return "FinameFilterFS"
}
func (fs *filenameFilterFs) Mkdir(n string, p os.FileMode) error {
return syscall.EPERM
}
func (fs *filenameFilterFs) MkdirAll(n string, p os.FileMode) error {
return syscall.EPERM
}
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