/*
* Copyright 2016 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 com.google.errorprone;
import com.google.common.base.Optional;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
/** The Error Prone version. */
public final class ErrorProneVersion {
private static final String PROPERTIES_RESOURCE =
"/META-INF/maven/com.google.errorprone/error_prone_core/pom.properties";
/**
* Loads the Error Prone version.
*
* <p>This depends on the Maven build, and will always return {@code Optional.absent()} with
* other build systems.
*/
public static Optional<String> loadVersionFromPom() {
try (InputStream stream = ErrorProneVersion.class.getResourceAsStream(PROPERTIES_RESOURCE)) {
if (stream == null) {
return Optional.absent();
}
Properties mavenProperties = new Properties();
mavenProperties.load(stream);
return Optional.of(mavenProperties.getProperty("version"));
} catch (IOException expected) {
return Optional.absent();
}
}
}