-
Notifications
You must be signed in to change notification settings - Fork 41
/
glob_matching.go
77 lines (70 loc) · 2.25 KB
/
glob_matching.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 fetchers
import (
"os"
"path/filepath"
"strings"
)
// Globs represents one filepath glob, with its elements joined by "**".
// Based on https://github.com/yargevad/filepathx/blob/master/filepathx.go
type Globs []string
// Glob adds double-star support to the core path/filepath Glob function.
// It's useful when your globs might have double-stars, but you're not sure.
func Glob(pattern string) ([]string, error) {
if !strings.Contains(pattern, "**") {
// pass to core package if no double-star
return filepath.Glob(pattern)
}
return Globs(strings.Split(pattern, "**")).Expand()
}
// Expand finds matches for the provided Globs.
func (globs Globs) Expand() ([]string, error) {
matches := []string{""} // accumulate here
for _, glob := range globs {
var hits []string
hitMap := map[string]bool{}
for _, match := range matches {
paths, err := filepath.Glob(match + glob)
if err != nil {
return nil, err
}
for _, path := range paths {
err = filepath.Walk(path, func(path string, _ os.FileInfo, err error) error {
if err != nil {
return err
}
// save deduped match from current iteration
if _, ok := hitMap[path]; !ok {
hits = append(hits, path)
hitMap[path] = true
}
return nil
})
if err != nil {
return nil, err
}
}
}
matches = hits
}
// fix up return value for nil input
if globs == nil && len(matches) > 0 && matches[0] == "" {
matches = matches[1:]
}
return matches, nil
}