mirror of https://github.com/cheat/cheat.git
73 lines
2.1 KiB
Go
73 lines
2.1 KiB
Go
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package util
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import (
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"os"
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"path/filepath"
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"github.com/go-git/go-billy/v5"
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)
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// walk recursively descends path, calling walkFn
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// adapted from https://golang.org/src/path/filepath/path.go
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func walk(fs billy.Filesystem, path string, info os.FileInfo, walkFn filepath.WalkFunc) error {
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if !info.IsDir() {
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return walkFn(path, info, nil)
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}
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names, err := readdirnames(fs, path)
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err1 := walkFn(path, info, err)
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// If err != nil, walk can't walk into this directory.
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// err1 != nil means walkFn want walk to skip this directory or stop walking.
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// Therefore, if one of err and err1 isn't nil, walk will return.
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if err != nil || err1 != nil {
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// The caller's behavior is controlled by the return value, which is decided
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// by walkFn. walkFn may ignore err and return nil.
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// If walkFn returns SkipDir, it will be handled by the caller.
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// So walk should return whatever walkFn returns.
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return err1
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}
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for _, name := range names {
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filename := filepath.Join(path, name)
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fileInfo, err := fs.Lstat(filename)
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if err != nil {
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if err := walkFn(filename, fileInfo, err); err != nil && err != filepath.SkipDir {
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return err
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}
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} else {
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err = walk(fs, filename, fileInfo, walkFn)
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if err != nil {
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if !fileInfo.IsDir() || err != filepath.SkipDir {
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return err
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}
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}
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}
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}
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return nil
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}
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// Walk walks the file tree rooted at root, calling fn for each file or
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// directory in the tree, including root. All errors that arise visiting files
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// and directories are filtered by fn: see the WalkFunc documentation for
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// details.
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//
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// The files are walked in lexical order, which makes the output deterministic
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// but requires Walk to read an entire directory into memory before proceeding
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// to walk that directory. Walk does not follow symbolic links.
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//
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// Function adapted from https://github.com/golang/go/blob/3b770f2ccb1fa6fecc22ea822a19447b10b70c5c/src/path/filepath/path.go#L500
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func Walk(fs billy.Filesystem, root string, walkFn filepath.WalkFunc) error {
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info, err := fs.Lstat(root)
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if err != nil {
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err = walkFn(root, nil, err)
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} else {
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err = walk(fs, root, info, walkFn)
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}
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if err == filepath.SkipDir {
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return nil
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}
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return err
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}
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