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// Copyright 2014 The Bazel Authors. 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 com.google.devtools.build.lib.bazel.repository;
import com.google.common.base.Optional;
import com.google.devtools.build.lib.concurrent.ThreadSafety;
import com.google.devtools.build.lib.vfs.PathFragment;
/**
* Utility class for removing a prefix from an archive's path.
*/
@ThreadSafety.Immutable
public final class StripPrefixedPath {
private final PathFragment pathFragment;
private final boolean found;
private final boolean skip;
public static StripPrefixedPath maybeDeprefix(String entry, Optional<String> prefix) {
boolean found = false;
PathFragment entryPath = new PathFragment(entry);
if (!prefix.isPresent()) {
return new StripPrefixedPath(entryPath, false, false);
}
PathFragment prefixPath = new PathFragment(prefix.get());
boolean skip = false;
if (entryPath.startsWith(prefixPath)) {
found = true;
entryPath = entryPath.relativeTo(prefixPath);
if (entryPath.getPathString().isEmpty()) {
skip = true;
}
} else {
skip = true;
}
return new StripPrefixedPath(entryPath, found, skip);
}
private StripPrefixedPath(PathFragment pathFragment, boolean found, boolean skip) {
this.pathFragment = pathFragment;
this.found = found;
this.skip = skip;
}
public PathFragment getPathFragment() {
return pathFragment;
}
public boolean foundPrefix() {
return found;
}
public boolean skip() {
return skip;
}
}
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