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.gitexe.command.branch;
020
021import java.io.File;
022
023import org.apache.maven.scm.ScmException;
024import org.apache.maven.scm.ScmFileSet;
025import org.apache.maven.scm.ScmFileStatus;
026import org.apache.maven.scm.ScmResult;
027import org.apache.maven.scm.command.branch.AbstractBranchCommand;
028import org.apache.maven.scm.command.branch.BranchScmResult;
029import org.apache.maven.scm.provider.ScmProviderRepository;
030import org.apache.maven.scm.provider.git.command.GitCommand;
031import org.apache.maven.scm.provider.git.gitexe.command.GitCommandLineUtils;
032import org.apache.maven.scm.provider.git.gitexe.command.list.GitListCommand;
033import org.apache.maven.scm.provider.git.gitexe.command.list.GitListConsumer;
034import org.apache.maven.scm.provider.git.repository.GitScmProviderRepository;
035import org.codehaus.plexus.util.cli.CommandLineUtils;
036import org.codehaus.plexus.util.cli.Commandline;
037
038/**
039 * @author <a href="mailto:struberg@yahoo.de">Mark Struberg</a>
040 *
041 */
042public class GitBranchCommand extends AbstractBranchCommand implements GitCommand {
043    /** {@inheritDoc} */
044    public ScmResult executeBranchCommand(ScmProviderRepository repo, ScmFileSet fileSet, String branch, String message)
045            throws ScmException {
046        if (branch == null || branch.trim().isEmpty()) {
047            throw new ScmException("branch name must be specified");
048        }
049
050        if (!fileSet.getFileList().isEmpty()) {
051            throw new ScmException("This provider doesn't support branching subsets of a directory");
052        }
053
054        GitScmProviderRepository repository = (GitScmProviderRepository) repo;
055
056        Commandline cl = createCommandLine(repository, fileSet.getBasedir(), branch);
057
058        CommandLineUtils.StringStreamConsumer stdout = new CommandLineUtils.StringStreamConsumer();
059        CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
060        int exitCode;
061
062        exitCode = GitCommandLineUtils.execute(cl, stdout, stderr);
063        if (exitCode != 0) {
064            return new BranchScmResult(cl.toString(), "The git-branch command failed.", stderr.getOutput(), false);
065        }
066
067        if (repo.isPushChanges()) {
068            // and now push the branch to the upstream repository
069            Commandline clPush = createPushCommandLine(repository, fileSet, branch);
070
071            exitCode = GitCommandLineUtils.execute(clPush, stdout, stderr);
072            if (exitCode != 0) {
073                return new BranchScmResult(
074                        clPush.toString(), "The git-push command failed.", stderr.getOutput(), false);
075            }
076        }
077
078        // as last action we search for the branched files
079        GitListConsumer listConsumer = new GitListConsumer(fileSet.getBasedir(), ScmFileStatus.TAGGED);
080
081        Commandline clList = GitListCommand.createCommandLine(repository, fileSet.getBasedir());
082
083        exitCode = GitCommandLineUtils.execute(clList, listConsumer, stderr);
084        if (exitCode != 0) {
085            return new BranchScmResult(
086                    clList.toString(), "The git-ls-files command failed.", stderr.getOutput(), false);
087        }
088
089        return new BranchScmResult(cl.toString(), listConsumer.getListedFiles());
090    }
091
092    // ----------------------------------------------------------------------
093    //
094    // ----------------------------------------------------------------------
095
096    public static Commandline createCommandLine(
097            GitScmProviderRepository repository, File workingDirectory, String branch) {
098        Commandline cl = GitCommandLineUtils.getBaseGitCommandLine(workingDirectory, "branch");
099
100        cl.createArg().setValue(branch);
101
102        return cl;
103    }
104
105    public static Commandline createPushCommandLine(
106            GitScmProviderRepository repository, ScmFileSet fileSet, String branch) throws ScmException {
107        Commandline cl = GitCommandLineUtils.getBaseGitCommandLine(fileSet.getBasedir(), "push");
108
109        cl.createArg().setValue(repository.getPushUrl());
110        cl.createArg().setValue("refs/heads/" + branch);
111
112        return cl;
113    }
114
115    /**
116     * Helper function to detect the current branch
117     */
118    public static String getCurrentBranch(GitScmProviderRepository repository, ScmFileSet fileSet) throws ScmException {
119        Commandline cl = GitCommandLineUtils.getBaseGitCommandLine(fileSet.getBasedir(), "symbolic-ref");
120        cl.createArg().setValue("HEAD");
121
122        CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
123        GitCurrentBranchConsumer cbConsumer = new GitCurrentBranchConsumer();
124        int exitCode;
125
126        exitCode = GitCommandLineUtils.execute(cl, cbConsumer, stderr);
127
128        if (exitCode != 0) {
129            throw new ScmException("Detecting the current branch failed: " + stderr.getOutput());
130        }
131
132        return cbConsumer.getBranchName();
133    }
134}