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// Copyright 2017 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 jar
import (
"fmt"
"strings"
)
// EntryNamesLess tells whether <filepathA> should precede <filepathB> in
// the order of files with a .jar
func EntryNamesLess(filepathA string, filepathB string) (less bool) {
diff := index(filepathA) - index(filepathB)
if diff == 0 {
return filepathA < filepathB
}
return diff < 0
}
// Treats trailing * as a prefix match
func patternMatch(pattern, name string) bool {
if strings.HasSuffix(pattern, "*") {
return strings.HasPrefix(name, strings.TrimSuffix(pattern, "*"))
} else {
return name == pattern
}
}
var jarOrder = []string{
"META-INF/",
"META-INF/MANIFEST.MF",
"META-INF/*",
"*",
}
func index(name string) int {
for i, pattern := range jarOrder {
if patternMatch(pattern, name) {
return i
}
}
panic(fmt.Errorf("file %q did not match any pattern", name))
}
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