// Copyright © 2014 Steve Francia <spf@spf13.com>. // Copyright 2009 The Go 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 afero import ( "path/filepath" "sort" "strings" ) // Glob returns the names of all files matching pattern or nil // if there is no matching file. The syntax of patterns is the same // as in Match. The pattern may describe hierarchical names such as // /usr/*/bin/ed (assuming the Separator is '/'). // // Glob ignores file system errors such as I/O errors reading directories. // The only possible returned error is ErrBadPattern, when pattern // is malformed. // // This was adapted from (http://golang.org/pkg/path/filepath) and uses several // built-ins from that package. func Glob(fs Fs, pattern string) (matches []string, err error) { if !hasMeta(pattern) { // Lstat not supported by a ll filesystems. if _, err = lstatIfPossible(fs, pattern); err != nil { return nil, nil } return []string{pattern}, nil } dir, file := filepath.Split(pattern) switch dir { case "": dir = "." case string(filepath.Separator): // nothing default: dir = dir[0 : len(dir)-1] // chop off trailing separator } if !hasMeta(dir) { return glob(fs, dir, file, nil) } var m []string m, err = Glob(fs, dir) if err != nil { return } for _, d := range m { matches, err = glob(fs, d, file, matches) if err != nil { return } } return } // glob searches for files matching pattern in the directory dir // and appends them to matches. If the directory cannot be // opened, it returns the existing matches. New matches are // added in lexicographical order. func glob(fs Fs, dir, pattern string, matches []string) (m []string, e error) { m = matches fi, err := fs.Stat(dir) if err != nil { return } if !fi.IsDir() { return } d, err := fs.Open(dir) if err != nil { return } defer d.Close() names, _ := d.Readdirnames(-1) sort.Strings(names) for _, n := range names { matched, err := filepath.Match(pattern, n) if err != nil { return m, err } if matched { m = append(m, filepath.Join(dir, n)) } } return } // hasMeta reports whether path contains any of the magic characters // recognized by Match. func hasMeta(path string) bool { // TODO(niemeyer): Should other magic characters be added here? return strings.IndexAny(path, "*?[") >= 0 }