mirror of https://github.com/stashapp/stash.git
81 lines
3.0 KiB
Go
81 lines
3.0 KiB
Go
|
// Modified from github.com/facebookgo/symwalk
|
||
|
|
|
||
|
|
// BSD License
|
||
|
|
|
||
|
|
// For symwalk software
|
||
|
|
|
||
|
|
// Copyright (c) 2015, Facebook, Inc. All rights reserved.
|
||
|
|
|
||
|
|
// Redistribution and use in source and binary forms, with or without modification,
|
||
|
|
// are permitted provided that the following conditions are met:
|
||
|
|
|
||
|
|
// * Redistributions of source code must retain the above copyright notice, this
|
||
|
|
// list of conditions and the following disclaimer.
|
||
|
|
|
||
|
|
// * Redistributions in binary form must reproduce the above copyright notice,
|
||
|
|
// this list of conditions and the following disclaimer in the documentation
|
||
|
|
// and/or other materials provided with the distribution.
|
||
|
|
|
||
|
|
// * Neither the name Facebook nor the names of its contributors may be used to
|
||
|
|
// endorse or promote products derived from this software without specific
|
||
|
|
// prior written permission.
|
||
|
|
|
||
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
||
|
|
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||
|
|
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||
|
|
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
|
||
|
|
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||
|
|
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||
|
|
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
||
|
|
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||
|
|
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
package utils
|
||
|
|
|
||
|
|
import (
|
||
|
|
"os"
|
||
|
|
"path/filepath"
|
||
|
|
)
|
||
|
|
|
||
|
|
// symwalkFunc calls the provided WalkFn for regular files.
|
||
|
|
// However, when it encounters a symbolic link, it resolves the link fully using the
|
||
|
|
// filepath.EvalSymlinks function and recursively calls symwalk.Walk on the resolved path.
|
||
|
|
// This ensures that unlink filepath.Walk, traversal does not stop at symbolic links.
|
||
|
|
//
|
||
|
|
// Note that symwalk.Walk does not terminate if there are any non-terminating loops in
|
||
|
|
// the file structure.
|
||
|
|
func walk(filename string, linkDirname string, walkFn filepath.WalkFunc) error {
|
||
|
|
symWalkFunc := func(path string, info os.FileInfo, err error) error {
|
||
|
|
|
||
|
|
if fname, err := filepath.Rel(filename, path); err == nil {
|
||
|
|
path = filepath.Join(linkDirname, fname)
|
||
|
|
} else {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
if err == nil && info.Mode()&os.ModeSymlink == os.ModeSymlink {
|
||
|
|
finalPath, err := filepath.EvalSymlinks(path)
|
||
|
|
if err != nil {
|
||
|
|
// don't bail out if symlink is invalid
|
||
|
|
return walkFn(path, info, err)
|
||
|
|
}
|
||
|
|
info, err := os.Lstat(finalPath)
|
||
|
|
if err != nil {
|
||
|
|
return walkFn(path, info, err)
|
||
|
|
}
|
||
|
|
if info.IsDir() {
|
||
|
|
return walk(finalPath, path, walkFn)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return walkFn(path, info, err)
|
||
|
|
}
|
||
|
|
return filepath.Walk(filename, symWalkFunc)
|
||
|
|
}
|
||
|
|
|
||
|
|
// SymWalk extends filepath.Walk to also follow symlinks
|
||
|
|
func SymWalk(path string, walkFn filepath.WalkFunc) error {
|
||
|
|
return walk(path, path, walkFn)
|
||
|
|
}
|