87 lines
2.2 KiB
Go
87 lines
2.2 KiB
Go
// Copyright (C) 2014 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at http://mozilla.org/MPL/2.0/.
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package fnmatch
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import (
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"path/filepath"
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"regexp"
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"runtime"
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"strings"
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)
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const (
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NoEscape = (1 << iota)
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PathName
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CaseFold
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)
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func Convert(pattern string, flags int) (*regexp.Regexp, error) {
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any := "."
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switch runtime.GOOS {
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case "windows":
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flags |= NoEscape | CaseFold
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pattern = filepath.FromSlash(pattern)
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if flags&PathName != 0 {
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any = "[^\\\\]"
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}
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case "darwin":
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flags |= CaseFold
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fallthrough
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default:
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if flags&PathName != 0 {
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any = "[^/]"
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}
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}
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// Support case insensitive ignores
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ignore := strings.TrimPrefix(pattern, "(?i)")
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if ignore != pattern {
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flags |= CaseFold
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pattern = ignore
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}
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if flags&NoEscape != 0 {
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pattern = strings.Replace(pattern, "\\", "\\\\", -1)
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} else {
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pattern = strings.Replace(pattern, "\\*", "[:escapedstar:]", -1)
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pattern = strings.Replace(pattern, "\\?", "[:escapedques:]", -1)
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pattern = strings.Replace(pattern, "\\.", "[:escapeddot:]", -1)
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}
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// Characters that are special in regexps but not in glob, must be
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// escaped.
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for _, char := range []string{".", "+", "$", "^", "(", ")", "|"} {
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pattern = strings.Replace(pattern, char, "\\"+char, -1)
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}
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pattern = strings.Replace(pattern, "**", "[:doublestar:]", -1)
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pattern = strings.Replace(pattern, "*", any+"*", -1)
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pattern = strings.Replace(pattern, "[:doublestar:]", ".*", -1)
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pattern = strings.Replace(pattern, "?", any, -1)
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pattern = strings.Replace(pattern, "[:escapedstar:]", "\\*", -1)
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pattern = strings.Replace(pattern, "[:escapedques:]", "\\?", -1)
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pattern = strings.Replace(pattern, "[:escapeddot:]", "\\.", -1)
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pattern = "^" + pattern + "$"
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if flags&CaseFold != 0 {
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pattern = "(?i)" + pattern
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}
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return regexp.Compile(pattern)
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}
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// Match matches the pattern against the string, with the given flags, and
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// returns true if the match is successful.
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func Match(pattern, s string, flags int) (bool, error) {
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exp, err := Convert(pattern, flags)
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if err != nil {
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return false, err
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}
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return exp.MatchString(s), nil
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}
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