tools/java/src/org/apache/bazel/checkstyle/ExtraActionUtils.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.bazel.checkstyle;

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Paths;

import com.google.devtools.build.lib.actions.extra.ExtraActionInfo;
import com.google.devtools.build.lib.actions.extra.ExtraActionsBase;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.ExtensionRegistry;

/**
 * Utility methods for checkstyles
 */
public final class ExtraActionUtils {

  private ExtraActionUtils() {
  }

  public static ExtraActionInfo getExtraActionInfo(String extraActionFile) {
    ExtensionRegistry registry = ExtensionRegistry.newInstance();
    ExtraActionsBase.registerAllExtensions(registry);

    try (InputStream stream = Files.newInputStream(Paths.get(extraActionFile))) {
      CodedInputStream coded = CodedInputStream.newInstance(stream);
      return ExtraActionInfo.parseFrom(coded, registry);
    } catch (IOException e) {
      throw new RuntimeException("ERROR: failed to deserialize extra action file "
        + extraActionFile + ": " + e.getMessage(), e);
    }
  }
}