92 lines
2.6 KiB
Go
92 lines
2.6 KiB
Go
// Copyright 2018 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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"os"
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"github.com/spf13/afero"
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)
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// RealFilenameInfo is a thin wrapper around os.FileInfo adding the real filename.
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type RealFilenameInfo interface {
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os.FileInfo
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// This is the real filename to the file in the underlying filesystem.
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RealFilename() string
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}
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type realFilenameInfo struct {
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os.FileInfo
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realFilename string
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}
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func (f *realFilenameInfo) RealFilename() string {
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return f.realFilename
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}
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// NewBasePathRealFilenameFs returns a new BasePathRealFilenameFs instance
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// using base.
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func NewBasePathRealFilenameFs(base *afero.BasePathFs) *BasePathRealFilenameFs {
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return &BasePathRealFilenameFs{BasePathFs: base}
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}
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// BasePathRealFilenameFs is a thin wrapper around afero.BasePathFs that
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// provides the real filename in Stat and LstatIfPossible.
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type BasePathRealFilenameFs struct {
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*afero.BasePathFs
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}
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// Stat returns the os.FileInfo structure describing a given file. If there is
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// an error, it will be of type *os.PathError.
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func (b *BasePathRealFilenameFs) Stat(name string) (os.FileInfo, error) {
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fi, err := b.BasePathFs.Stat(name)
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if err != nil {
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return nil, err
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}
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if _, ok := fi.(RealFilenameInfo); ok {
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return fi, nil
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}
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filename, err := b.RealPath(name)
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if err != nil {
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return nil, &os.PathError{Op: "stat", Path: name, Err: err}
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}
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return &realFilenameInfo{FileInfo: fi, realFilename: filename}, nil
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}
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// LstatIfPossible returns the os.FileInfo structure describing a given file.
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// It attempts to use Lstat if supported or defers to the os. In addition to
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// the FileInfo, a boolean is returned telling whether Lstat was called.
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func (b *BasePathRealFilenameFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
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fi, ok, err := b.BasePathFs.LstatIfPossible(name)
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if err != nil {
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return nil, false, err
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}
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if _, ok := fi.(RealFilenameInfo); ok {
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return fi, ok, nil
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}
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filename, err := b.RealPath(name)
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if err != nil {
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return nil, false, &os.PathError{Op: "lstat", Path: name, Err: err}
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}
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return &realFilenameInfo{FileInfo: fi, realFilename: filename}, ok, nil
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}
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