001 package org.apache.maven.scm.provider.hg.command.diff;
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
022 import org.apache.maven.scm.ScmFile;
023 import org.apache.maven.scm.ScmFileStatus;
024 import org.apache.maven.scm.log.ScmLogger;
025 import org.apache.maven.scm.provider.hg.command.HgConsumer;
026
027 import java.io.File;
028 import java.util.ArrayList;
029 import java.util.HashMap;
030 import java.util.List;
031 import java.util.Map;
032
033 /**
034 * @author <a href="mailto:thurner.rupert@ymono.net">thurner rupert</a>
035 * @author Olivier Lamy
036 * @version $Id: HgDiffConsumer.java 1306867 2012-03-29 13:45:10Z olamy $
037 */
038 public class HgDiffConsumer
039 extends HgConsumer
040 {
041
042 // private static final String MODIFIED_FILE_TOKEN = "=== modified file ";
043
044 private static final String INDEX_TOKEN = "diff -r ";
045
046 private static final String FILE_SEPARATOR_TOKEN = "===";
047
048 private static final String START_REVISION_TOKEN = "---";
049
050 private static final String END_REVISION_TOKEN = "+++";
051
052 private static final String ADDED_LINE_TOKEN = "+";
053
054 private static final String REMOVED_LINE_TOKEN = "-";
055
056 private static final String UNCHANGED_LINE_TOKEN = " ";
057
058 private static final String CHANGE_SEPARATOR_TOKEN = "@@";
059
060 private static final String NO_NEWLINE_TOKEN = "\\ No newline at end of file";
061
062 private static final int HASH_ID_LEN = 12;
063
064 private ScmLogger logger;
065
066 private String currentFile;
067
068 private StringBuilder currentDifference;
069
070 private List<ScmFile> changedFiles = new ArrayList<ScmFile>();
071
072 private Map<String,CharSequence> differences = new HashMap<String,CharSequence>();
073
074 private StringBuilder patch = new StringBuilder();
075
076 @SuppressWarnings( "unused" )
077 private File workingDirectory;
078
079
080 public HgDiffConsumer( ScmLogger logger, File workingDirectory )
081 {
082 super( logger );
083 this.logger = logger;
084 this.workingDirectory = workingDirectory;
085 }
086
087 // ----------------------------------------------------------------------
088 // StreamConsumer Implementation
089 // ----------------------------------------------------------------------
090
091 /** {@inheritDoc} */
092 public void consumeLine( String line )
093 {
094 if ( line.startsWith( INDEX_TOKEN ) )
095 {
096 // start a new file
097 currentFile = line.substring( INDEX_TOKEN.length() + HASH_ID_LEN + 1 );
098
099 changedFiles.add( new ScmFile( currentFile, ScmFileStatus.MODIFIED ) );
100
101 currentDifference = new StringBuilder();
102
103 differences.put( currentFile, currentDifference );
104
105 patch.append( line ).append( "\n" );
106
107 return;
108 }
109
110 if ( currentFile == null )
111 {
112 if ( logger.isWarnEnabled() )
113 {
114 logger.warn( "Unparseable line: '" + line + "'" );
115 }
116 patch.append( line ).append( "\n" );
117 return;
118 }
119
120 if ( line.startsWith( FILE_SEPARATOR_TOKEN ) )
121 {
122 // skip
123 patch.append( line ).append( "\n" );
124 }
125 else if ( line.startsWith( START_REVISION_TOKEN ) )
126 {
127 // skip, though could parse to verify filename, start revision
128 patch.append( line ).append( "\n" );
129 }
130 else if ( line.startsWith( END_REVISION_TOKEN ) )
131 {
132 // skip, though could parse to verify filename, end revision
133 patch.append( line ).append( "\n" );
134 }
135 else if ( line.startsWith( ADDED_LINE_TOKEN ) || line.startsWith( REMOVED_LINE_TOKEN )
136 || line.startsWith( UNCHANGED_LINE_TOKEN ) || line.startsWith( CHANGE_SEPARATOR_TOKEN )
137 || line.equals( NO_NEWLINE_TOKEN ) )
138 {
139 // add to buffer
140 currentDifference.append( line ).append( "\n" );
141 patch.append( line ).append( "\n" );
142 }
143 else
144 {
145 // TODO: handle property differences
146
147 if ( logger.isWarnEnabled() )
148 {
149 logger.warn( "Unparseable line: '" + line + "'" );
150 }
151 patch.append( line ).append( "\n" );
152 // skip to next file
153 currentFile = null;
154 currentDifference = null;
155 }
156 }
157
158 public List<ScmFile> getChangedFiles()
159 {
160 return changedFiles;
161 }
162
163 public Map<String,CharSequence> getDifferences()
164 {
165 return differences;
166 }
167
168 public String getPatch()
169 {
170 return patch.toString();
171 }
172 }