You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
119 lines
3.1 KiB
Go
119 lines
3.1 KiB
Go
/*
|
|
Copyright (c) for portions of walk.go are held by The Go Authors, 2009 and are provided under
|
|
the BSD license.
|
|
|
|
https://github.com/golang/go/blob/master/LICENSE
|
|
|
|
Copyright The Helm Authors.
|
|
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 sympath
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
"path/filepath"
|
|
"sort"
|
|
)
|
|
|
|
// 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 follows symbolic links.
|
|
func Walk(root string, walkFn filepath.WalkFunc) error {
|
|
info, err := os.Lstat(root)
|
|
if err != nil {
|
|
err = walkFn(root, nil, err)
|
|
} else {
|
|
err = symwalk(root, info, walkFn)
|
|
}
|
|
if err == filepath.SkipDir {
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
|
|
// readDirNames reads the directory named by dirname and returns
|
|
// a sorted list of directory entries.
|
|
func readDirNames(dirname string) ([]string, error) {
|
|
f, err := os.Open(dirname)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
names, err := f.Readdirnames(-1)
|
|
f.Close()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
sort.Strings(names)
|
|
return names, nil
|
|
}
|
|
|
|
// symwalk recursively descends path, calling walkFn.
|
|
func symwalk(path string, info os.FileInfo, walkFn filepath.WalkFunc) error {
|
|
// Recursively walk symlinked directories.
|
|
if IsSymlink(info) {
|
|
resolved, err := filepath.EvalSymlinks(path)
|
|
if err != nil {
|
|
return fmt.Errorf("error evaluating symlink %s: %s", path, err)
|
|
}
|
|
log.Printf("found symbolic link in path: %s resolves to %s", path, resolved)
|
|
if info, err = os.Lstat(resolved); err != nil {
|
|
return err
|
|
}
|
|
if err := symwalk(path, info, walkFn); err != nil && err != filepath.SkipDir {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
if err := walkFn(path, info, nil); err != nil {
|
|
return err
|
|
}
|
|
|
|
if !info.IsDir() {
|
|
return nil
|
|
}
|
|
|
|
names, err := readDirNames(path)
|
|
if err != nil {
|
|
return walkFn(path, info, err)
|
|
}
|
|
|
|
for _, name := range names {
|
|
filename := filepath.Join(path, name)
|
|
fileInfo, err := os.Lstat(filename)
|
|
if err != nil {
|
|
if err := walkFn(filename, fileInfo, err); err != nil && err != filepath.SkipDir {
|
|
return err
|
|
}
|
|
} else {
|
|
err = symwalk(filename, fileInfo, walkFn)
|
|
if err != nil {
|
|
if (!fileInfo.IsDir() && !IsSymlink(fileInfo)) || err != filepath.SkipDir {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// IsSymlink is used to determine if the fileinfo is a symbolic link.
|
|
func IsSymlink(fi os.FileInfo) bool {
|
|
return fi.Mode()&os.ModeSymlink != 0
|
|
}
|