mirror of
https://github.com/octoleo/syncthing.git
synced 2024-11-09 14:50:56 +00:00
95 lines
2.9 KiB
Go
95 lines
2.9 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// This part copied directly from golang.org/src/path/filepath/path.go (Go
|
|
// 1.6) and lightly modified to be methods on BasicFilesystem.
|
|
|
|
// In our Walk() all paths given to a WalkFunc() are relative to the
|
|
// filesystem root.
|
|
|
|
package fs
|
|
|
|
import "path/filepath"
|
|
|
|
// WalkFunc is the type of the function called for each file or directory
|
|
// visited by Walk. The path argument contains the argument to Walk as a
|
|
// prefix; that is, if Walk is called with "dir", which is a directory
|
|
// containing the file "a", the walk function will be called with argument
|
|
// "dir/a". The info argument is the FileInfo for the named path.
|
|
//
|
|
// If there was a problem walking to the file or directory named by path, the
|
|
// incoming error will describe the problem and the function can decide how
|
|
// to handle that error (and Walk will not descend into that directory). If
|
|
// an error is returned, processing stops. The sole exception is when the function
|
|
// returns the special value SkipDir. If the function returns SkipDir when invoked
|
|
// on a directory, Walk skips the directory's contents entirely.
|
|
// If the function returns SkipDir when invoked on a non-directory file,
|
|
// Walk skips the remaining files in the containing directory.
|
|
type WalkFunc func(path string, info FileInfo, err error) error
|
|
|
|
type walkFilesystem struct {
|
|
Filesystem
|
|
}
|
|
|
|
func NewWalkFilesystem(next Filesystem) Filesystem {
|
|
return &walkFilesystem{next}
|
|
}
|
|
|
|
// walk recursively descends path, calling walkFn.
|
|
func (f *walkFilesystem) walk(path string, info FileInfo, walkFn WalkFunc) error {
|
|
path, err := Canonicalize(path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
err = walkFn(path, info, nil)
|
|
if err != nil {
|
|
if info.IsDir() && err == SkipDir {
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
|
|
if !info.IsDir() && path != "." {
|
|
return nil
|
|
}
|
|
|
|
names, err := f.DirNames(path)
|
|
if err != nil {
|
|
return walkFn(path, info, err)
|
|
}
|
|
|
|
for _, name := range names {
|
|
filename := filepath.Join(path, name)
|
|
fileInfo, err := f.Lstat(filename)
|
|
if err != nil {
|
|
if err := walkFn(filename, fileInfo, err); err != nil && err != SkipDir {
|
|
return err
|
|
}
|
|
} else {
|
|
err = f.walk(filename, fileInfo, walkFn)
|
|
if err != nil {
|
|
if !fileInfo.IsDir() || err != SkipDir {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Walk walks the file tree rooted at root, calling walkFn for each file or
|
|
// directory in the tree, including root. All errors that arise visiting files
|
|
// and directories are filtered by walkFn. The files are walked in lexical
|
|
// order, which makes the output deterministic but means that for very
|
|
// large directories Walk can be inefficient.
|
|
// Walk does not follow symbolic links.
|
|
func (f *walkFilesystem) Walk(root string, walkFn WalkFunc) error {
|
|
info, err := f.Lstat(root)
|
|
if err != nil {
|
|
return walkFn(root, nil, err)
|
|
}
|
|
return f.walk(root, info, walkFn)
|
|
}
|