001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.maven.scm.provider.git.jgit.command.blame;
020
021import java.io.File;
022import java.util.ArrayList;
023import java.util.List;
024
025import org.apache.maven.scm.ScmException;
026import org.apache.maven.scm.ScmFileSet;
027import org.apache.maven.scm.command.blame.AbstractBlameCommand;
028import org.apache.maven.scm.command.blame.BlameLine;
029import org.apache.maven.scm.command.blame.BlameScmResult;
030import org.apache.maven.scm.provider.ScmProviderRepository;
031import org.apache.maven.scm.provider.git.command.GitCommand;
032import org.apache.maven.scm.provider.git.jgit.command.JGitUtils;
033import org.eclipse.jgit.api.Git;
034import org.eclipse.jgit.blame.BlameResult;
035
036/**
037 * @author Dominik Bartholdi (imod)
038 * @since 1.9
039 */
040public class JGitBlameCommand extends AbstractBlameCommand implements GitCommand {
041
042    @Override
043    public BlameScmResult executeBlameCommand(ScmProviderRepository repo, ScmFileSet workingDirectory, String filename)
044            throws ScmException {
045
046        Git git = null;
047        File basedir = workingDirectory.getBasedir();
048        try {
049            git = JGitUtils.openRepo(basedir);
050            BlameResult blameResult = git.blame().setFilePath(filename).call();
051
052            List<BlameLine> lines = new ArrayList<>();
053
054            int i = 0;
055            while ((i = blameResult.computeNext()) != -1) {
056                lines.add(new BlameLine(
057                        blameResult.getSourceAuthor(i).getWhen(),
058                        blameResult.getSourceCommit(i).getName(),
059                        blameResult.getSourceAuthor(i).getName(),
060                        blameResult.getSourceCommitter(i).getName()));
061            }
062
063            return new BlameScmResult("JGit blame", lines);
064        } catch (Exception e) {
065            throw new ScmException("JGit blame failure!", e);
066        } finally {
067            JGitUtils.closeRepo(git);
068        }
069    }
070}