syncthing/internal/fnmatch/fnmatch.go

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// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
// All rights reserved. Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package fnmatch
import (
"path/filepath"
"regexp"
"runtime"
"strings"
)
const (
FNM_NOESCAPE = (1 << iota)
FNM_PATHNAME
FNM_CASEFOLD
)
func Convert(pattern string, flags int) (*regexp.Regexp, error) {
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any := "."
switch runtime.GOOS {
case "windows":
flags |= FNM_NOESCAPE | FNM_CASEFOLD
pattern = filepath.FromSlash(pattern)
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if flags&FNM_PATHNAME != 0 {
any = "[^\\\\]"
}
case "darwin":
flags |= FNM_CASEFOLD
fallthrough
default:
if flags&FNM_PATHNAME != 0 {
any = "[^/]"
}
}
if flags&FNM_NOESCAPE != 0 {
pattern = strings.Replace(pattern, "\\", "\\\\", -1)
} else {
pattern = strings.Replace(pattern, "\\*", "[:escapedstar:]", -1)
pattern = strings.Replace(pattern, "\\?", "[:escapedques:]", -1)
pattern = strings.Replace(pattern, "\\.", "[:escapeddot:]", -1)
}
pattern = strings.Replace(pattern, ".", "\\.", -1)
pattern = strings.Replace(pattern, "**", "[:doublestar:]", -1)
pattern = strings.Replace(pattern, "*", any+"*", -1)
pattern = strings.Replace(pattern, "[:doublestar:]", ".*", -1)
pattern = strings.Replace(pattern, "?", any, -1)
pattern = strings.Replace(pattern, "[:escapedstar:]", "\\*", -1)
pattern = strings.Replace(pattern, "[:escapedques:]", "\\?", -1)
pattern = strings.Replace(pattern, "[:escapeddot:]", "\\.", -1)
pattern = "^" + pattern + "$"
if flags&FNM_CASEFOLD != 0 {
pattern = "(?i)" + pattern
}
return regexp.Compile(pattern)
}
// Matches the pattern against the string, with the given flags,
// and returns true if the match is successful.
func Match(pattern, s string, flags int) (bool, error) {
exp, err := Convert(pattern, flags)
if err != nil {
return false, err
}
return exp.MatchString(s), nil
}