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// Copyright 2018 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"
"github.com/spf13/afero"
)
// RealFilenameInfo is a thin wrapper around os.FileInfo adding the real filename.
type RealFilenameInfo interface {
os.FileInfo
// This is the real filename to the file in the underlying filesystem.
RealFilename() string
}
type realFilenameInfo struct {
os.FileInfo
realFilename string
}
func (f *realFilenameInfo) RealFilename() string {
return f.realFilename
}
func NewBasePathRealFilenameFs(base *afero.BasePathFs) *BasePathRealFilenameFs {
return &BasePathRealFilenameFs{BasePathFs: base}
}
// This is a thin wrapper around afero.BasePathFs that provides the real filename
// in Stat and LstatIfPossible.
type BasePathRealFilenameFs struct {
*afero.BasePathFs
}
func (b *BasePathRealFilenameFs) Stat(name string) (os.FileInfo, error) {
fi, err := b.BasePathFs.Stat(name)
if err != nil {
return nil, err
}
if _, ok := fi.(RealFilenameInfo); ok {
return fi, nil
}
filename, err := b.RealPath(name)
if err != nil {
return nil, &os.PathError{Op: "stat", Path: name, Err: err}
}
return &realFilenameInfo{FileInfo: fi, realFilename: filename}, nil
}
func (b *BasePathRealFilenameFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
fi, ok, err := b.BasePathFs.LstatIfPossible(name)
if err != nil {
return nil, false, err
}
if _, ok := fi.(RealFilenameInfo); ok {
return fi, ok, nil
}
filename, err := b.RealPath(name)
if err != nil {
return nil, false, &os.PathError{Op: "lstat", Path: name, Err: err}
}
return &realFilenameInfo{FileInfo: fi, realFilename: filename}, ok, nil
}
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