001package org.apache.maven.scm.provider.git.gitexe.command.remoteinfo;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 * http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import org.apache.maven.scm.command.remoteinfo.RemoteInfoScmResult;
023import org.apache.maven.scm.log.ScmLogger;
024import org.apache.regexp.RE;
025import org.apache.regexp.RESyntaxException;
026import org.codehaus.plexus.util.cli.StreamConsumer;
027
028import java.util.HashMap;
029
030/**
031 * @author Bertrand Paquet
032 */
033public class GitRemoteInfoConsumer
034    implements StreamConsumer
035{
036
037    /**
038     * The pattern used to match branches
039     */
040    private static final String BRANCH_PATTERN = "^(.*)\\s+refs/heads/(.*)";
041
042    /**
043     * The pattern used to match tags
044     */
045    private static final String TAGS_PATTERN = "^(.*)\\s+refs/tags/(.*)";
046
047    private ScmLogger logger;
048
049    private RemoteInfoScmResult remoteInfoScmResult;
050
051    private RE branchRegexp;
052
053    private RE tagRegexp;
054
055    // ----------------------------------------------------------------------
056    //
057    // ----------------------------------------------------------------------
058
059    public GitRemoteInfoConsumer( ScmLogger logger, String commandLine )
060    {
061        this.logger = logger;
062        this.remoteInfoScmResult =
063            new RemoteInfoScmResult( commandLine, new HashMap<String, String>(), new HashMap<String, String>() );
064
065        try
066        {
067            this.branchRegexp = new RE( BRANCH_PATTERN );
068            this.tagRegexp = new RE( TAGS_PATTERN );
069        }
070        catch ( RESyntaxException ex )
071        {
072            throw new RuntimeException(
073                "INTERNAL ERROR: Could not create regexp to parse git ls-remote file. This shouldn't happen. Something is probably wrong with the oro installation.",
074                ex );
075        }
076    }
077
078    // ----------------------------------------------------------------------
079    // StreamConsumer Implementation
080    // ----------------------------------------------------------------------
081
082    /**
083     * {@inheritDoc}
084     */
085    public void consumeLine( String line )
086    {
087        if ( logger.isDebugEnabled() )
088        {
089            logger.debug( line );
090        }
091        if ( branchRegexp.match( line ) )
092        {
093            remoteInfoScmResult.getBranches().put( branchRegexp.getParen( 2 ), branchRegexp.getParen( 1 ) );
094        }
095        if ( tagRegexp.match( line ) )
096        {
097            remoteInfoScmResult.getTags().put( tagRegexp.getParen( 2 ), tagRegexp.getParen( 1 ) );
098        }
099
100    }
101
102    public RemoteInfoScmResult getRemoteInfoScmResult()
103    {
104        return remoteInfoScmResult;
105    }
106
107}