mv internal lib

lib/fnmatch/fnmatch.go

@@ -0,0 +1,87 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package fnmatch
+
+import (
+	"path/filepath"
+	"regexp"
+	"runtime"
+	"strings"
+)
+
+const (
+	NoEscape = (1 << iota)
+	PathName
+	CaseFold
+)
+
+func Convert(pattern string, flags int) (*regexp.Regexp, error) {
+	any := "."
+
+	switch runtime.GOOS {
+	case "windows":
+		flags |= NoEscape | CaseFold
+		pattern = filepath.FromSlash(pattern)
+		if flags&PathName != 0 {
+			any = "[^\\\\]"
+		}
+	case "darwin":
+		flags |= CaseFold
+		fallthrough
+	default:
+		if flags&PathName != 0 {
+			any = "[^/]"
+		}
+	}
+
+	// Support case insensitive ignores. We do the loop because we may in some
+	// circumstances end up with multiple insensitivity prefixes
+	// ("(?i)(?i)foo"), which should be accepted.
+	for ignore := strings.TrimPrefix(pattern, "(?i)"); ignore != pattern; ignore = strings.TrimPrefix(pattern, "(?i)") {
+		flags |= CaseFold
+		pattern = ignore
+	}
+
+	if flags&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)
+	}
+
+	// Characters that are special in regexps but not in glob, must be
+	// escaped.
+	for _, char := range []string{".", "+", "$", "^", "(", ")", "|"} {
+		pattern = strings.Replace(pattern, char, "\\"+char, -1)
+	}
+
+	pattern = strings.Replace(pattern, "**", "[:doublestar:]", -1)
+	pattern = strings.Replace(pattern, "*", any+"*", -1)
+	pattern = strings.Replace(pattern, "[:doublestar:]", ".*", -1)
+	pattern = strings.Replace(pattern, "?", any, -1)
+
+	pattern = strings.Replace(pattern, "[:escapedstar:]", "\\*", -1)
+	pattern = strings.Replace(pattern, "[:escapedques:]", "\\?", -1)
+	pattern = strings.Replace(pattern, "[:escapeddot:]", "\\.", -1)
+
+	pattern = "^" + pattern + "$"
+	if flags&CaseFold != 0 {
+		pattern = "(?i)" + pattern
+	}
+	return regexp.Compile(pattern)
+}
+
+// Match 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
+}

lib/fnmatch/fnmatch_test.go

@@ -0,0 +1,102 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package fnmatch
+
+import (
+	"path/filepath"
+	"runtime"
+	"testing"
+)
+
+type testcase struct {
+	pat   string
+	name  string
+	flags int
+	match bool
+}
+
+var testcases = []testcase{
+	{"", "", 0, true},
+	{"*", "", 0, true},
+	{"*", "foo", 0, true},
+	{"*", "bar", 0, true},
+	{"*", "*", 0, true},
+	{"**", "f", 0, true},
+	{"**", "foo.txt", 0, true},
+	{"*.*", "foo.txt", 0, true},
+	{"foo*.txt", "foobar.txt", 0, true},
+	{"foo.txt", "foo.txt", 0, true},
+
+	{"foo.txt", "bar/foo.txt", 0, false},
+	{"*/foo.txt", "bar/foo.txt", 0, true},
+	{"f?o.txt", "foo.txt", 0, true},
+	{"f?o.txt", "fooo.txt", 0, false},
+	{"f[ab]o.txt", "foo.txt", 0, false},
+	{"f[ab]o.txt", "fao.txt", 0, true},
+	{"f[ab]o.txt", "fbo.txt", 0, true},
+	{"f[ab]o.txt", "fco.txt", 0, false},
+	{"f[ab]o.txt", "fabo.txt", 0, false},
+	{"f[ab]o.txt", "f[ab]o.txt", 0, false},
+	{"f\\[ab\\]o.txt", "f[ab]o.txt", NoEscape, false},
+
+	{"*foo.txt", "bar/foo.txt", 0, true},
+	{"*foo.txt", "bar/foo.txt", PathName, false},
+	{"*/foo.txt", "bar/foo.txt", 0, true},
+	{"*/foo.txt", "bar/foo.txt", PathName, true},
+	{"*/foo.txt", "bar/baz/foo.txt", 0, true},
+	{"*/foo.txt", "bar/baz/foo.txt", PathName, false},
+	{"**/foo.txt", "bar/baz/foo.txt", 0, true},
+	{"**/foo.txt", "bar/baz/foo.txt", PathName, true},
+
+	{"foo.txt", "foo.TXT", CaseFold, true},
+	{"(?i)foo.txt", "foo.TXT", 0, true},
+	{"(?i)(?i)foo.txt", "foo.TXT", 0, true}, // repeated prefix should be fine
+	{"(?i)**foo.txt", "/dev/tmp/foo.TXT", 0, true},
+	{"(?i)!**foo.txt", "/dev/tmp/foo.TXT", 0, false},
+
+	// These characters are literals in glob, but not in regexp.
+	{"hey$hello", "hey$hello", 0, true},
+	{"hey^hello", "hey^hello", 0, true},
+	{"hey{hello", "hey{hello", 0, true},
+	{"hey}hello", "hey}hello", 0, true},
+	{"hey(hello", "hey(hello", 0, true},
+	{"hey)hello", "hey)hello", 0, true},
+	{"hey|hello", "hey|hello", 0, true},
+	{"hey|hello", "hey|other", 0, false},
+}
+
+func TestMatch(t *testing.T) {
+	switch runtime.GOOS {
+	case "windows":
+		testcases = append(testcases, testcase{"foo.txt", "foo.TXT", 0, true})
+	case "darwin":
+		testcases = append(testcases, testcase{"foo.txt", "foo.TXT", 0, true})
+		fallthrough
+	default:
+		testcases = append(testcases, testcase{"f\\[ab\\]o.txt", "f[ab]o.txt", 0, true})
+		testcases = append(testcases, testcase{"foo\\.txt", "foo.txt", 0, true})
+		testcases = append(testcases, testcase{"foo\\*.txt", "foo*.txt", 0, true})
+		testcases = append(testcases, testcase{"foo\\.txt", "foo.txt", NoEscape, false})
+		testcases = append(testcases, testcase{"f\\\\\\[ab\\\\\\]o.txt", "f\\[ab\\]o.txt", 0, true})
+	}
+
+	for _, tc := range testcases {
+		if m, err := Match(tc.pat, filepath.FromSlash(tc.name), tc.flags); m != tc.match {
+			if err != nil {
+				t.Error(err)
+			} else {
+				t.Errorf("Match(%q, %q, %d) != %v", tc.pat, tc.name, tc.flags, tc.match)
+			}
+		}
+	}
+}
+
+func TestInvalid(t *testing.T) {
+	if _, err := Match("foo[bar", "...", 0); err == nil {
+		t.Error("Unexpected nil error")
+	}
+}