Import files from compare_target_files for use in diff_target_files
Copied from cl/240594925.
Bug: 121158314
Test: copied unit tests
Change-Id: I2e91126285dcd33171ff8b8dbfcfa5d48501f535
diff --git a/cmd/diff_target_files/glob.go b/cmd/diff_target_files/glob.go
new file mode 100644
index 0000000..ed91af7
--- /dev/null
+++ b/cmd/diff_target_files/glob.go
@@ -0,0 +1,81 @@
+// Copyright 2019 Google Inc. All rights reserved.
+//
+// Licensed 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 main
+
+import (
+ "errors"
+ "path/filepath"
+ "strings"
+)
+
+// Match returns true if name matches pattern using the same rules as filepath.Match, but supporting
+// recursive globs (**).
+func Match(pattern, name string) (bool, error) {
+ if filepath.Base(pattern) == "**" {
+ return false, errors.New("pattern has '**' as last path element")
+ }
+
+ patternDir := pattern[len(pattern)-1] == '/'
+ nameDir := name[len(name)-1] == '/'
+
+ if patternDir != nameDir {
+ return false, nil
+ }
+
+ if nameDir {
+ name = name[:len(name)-1]
+ pattern = pattern[:len(pattern)-1]
+ }
+
+ for {
+ var patternFile, nameFile string
+ pattern, patternFile = filepath.Dir(pattern), filepath.Base(pattern)
+
+ if patternFile == "**" {
+ if strings.Contains(pattern, "**") {
+ return false, errors.New("pattern contains multiple '**'")
+ }
+ // Test if the any prefix of name matches the part of the pattern before **
+ for {
+ if name == "." || name == "/" {
+ return name == pattern, nil
+ }
+ if match, err := filepath.Match(pattern, name); err != nil {
+ return false, err
+ } else if match {
+ return true, nil
+ }
+ name = filepath.Dir(name)
+ }
+ } else if strings.Contains(patternFile, "**") {
+ return false, errors.New("pattern contains other characters between '**' and path separator")
+ }
+
+ name, nameFile = filepath.Dir(name), filepath.Base(name)
+
+ if nameFile == "." && patternFile == "." {
+ return true, nil
+ } else if nameFile == "/" && patternFile == "/" {
+ return true, nil
+ } else if nameFile == "." || patternFile == "." || nameFile == "/" || patternFile == "/" {
+ return false, nil
+ }
+
+ match, err := filepath.Match(patternFile, nameFile)
+ if err != nil || !match {
+ return match, err
+ }
+ }
+}