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110 lines
2.8 KiB
Go
110 lines
2.8 KiB
Go
// Copyright © 2014 Steve Francia <spf@spf13.com>.
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// Copyright 2009 The Go Authors. All rights reserved.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package afero
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import (
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"path/filepath"
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"sort"
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"strings"
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)
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// Glob returns the names of all files matching pattern or nil
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// if there is no matching file. The syntax of patterns is the same
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// as in Match. The pattern may describe hierarchical names such as
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// /usr/*/bin/ed (assuming the Separator is '/').
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//
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// Glob ignores file system errors such as I/O errors reading directories.
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// The only possible returned error is ErrBadPattern, when pattern
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// is malformed.
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//
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// This was adapted from (http://golang.org/pkg/path/filepath) and uses several
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// built-ins from that package.
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func Glob(fs Fs, pattern string) (matches []string, err error) {
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if !hasMeta(pattern) {
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// Lstat not supported by a ll filesystems.
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if _, err = lstatIfPossible(fs, pattern); err != nil {
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return nil, nil
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}
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return []string{pattern}, nil
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}
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dir, file := filepath.Split(pattern)
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switch dir {
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case "":
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dir = "."
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case string(filepath.Separator):
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// nothing
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default:
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dir = dir[0 : len(dir)-1] // chop off trailing separator
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}
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if !hasMeta(dir) {
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return glob(fs, dir, file, nil)
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}
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var m []string
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m, err = Glob(fs, dir)
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if err != nil {
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return
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}
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for _, d := range m {
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matches, err = glob(fs, d, file, matches)
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if err != nil {
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return
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}
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}
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return
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}
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// glob searches for files matching pattern in the directory dir
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// and appends them to matches. If the directory cannot be
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// opened, it returns the existing matches. New matches are
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// added in lexicographical order.
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func glob(fs Fs, dir, pattern string, matches []string) (m []string, e error) {
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m = matches
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fi, err := fs.Stat(dir)
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if err != nil {
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return
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}
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if !fi.IsDir() {
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return
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}
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d, err := fs.Open(dir)
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if err != nil {
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return
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}
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defer d.Close()
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names, _ := d.Readdirnames(-1)
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sort.Strings(names)
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for _, n := range names {
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matched, err := filepath.Match(pattern, n)
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if err != nil {
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return m, err
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}
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if matched {
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m = append(m, filepath.Join(dir, n))
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}
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}
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return
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}
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// hasMeta reports whether path contains any of the magic characters
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// recognized by Match.
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func hasMeta(path string) bool {
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// TODO(niemeyer): Should other magic characters be added here?
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return strings.IndexAny(path, "*?[") >= 0
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}
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