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// Copyright 2015 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.java.bazel;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOError;
import java.nio.file.AccessDeniedException;
/**
* Utility class to provide java-level access to the blessed langtools jar path:
* {@code //third_party/java/jdk:langtools}, as defined by bazel's --java_langtools flag.
*/
public class JavaLangtools {
private static final File FILE;
private static String getRunfilesDir() {
String dir = System.getenv("JAVA_RUNFILES");
if (dir == null) {
dir = System.getenv("TEST_SRCDIR");
}
if (dir == null) {
throw new IllegalStateException(
"Neither JAVA_RUNFILES nor TEST_SRCDIR environment variable was defined!");
}
return dir;
}
static {
File file = new File(getRunfilesDir(), JavaLangtoolsLocation.FILE);
if (!file.isFile()) {
throw new IOError(new FileNotFoundException("Can't find langtools jar: " + file.getPath()));
} else if (!file.canRead()) {
throw new IOError(new AccessDeniedException("Can't read langtools jar: " + file.getPath()));
}
FILE = file;
}
/**
* Returns the blessed langtools jar path.
*/
public static File file() {
return FILE;
}
}
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