1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.maven.scm.provider.git.gitexe.command.update;
20
21 import java.util.regex.Matcher;
22 import java.util.regex.Pattern;
23
24 import org.apache.maven.scm.util.AbstractConsumer;
25
26 /**
27 * @author <a href="mailto:struberg@yahoo.de">Mark Struberg</a>
28 */
29 public class GitLatestRevisionCommandConsumer extends AbstractConsumer {
30
31 /**
32 * The pattern used to match git log latest revision lines.
33 */
34 private static final Pattern LATESTREV_PATTERN = Pattern.compile("^commit \\s*(.*)");
35
36 private String latestRevision;
37
38 /**
39 * {@inheritDoc}
40 */
41 public void consumeLine(String line) {
42 if (logger.isDebugEnabled()) {
43 logger.debug("GitLatestRevisionCommandConsumer consumeLine : " + line);
44 }
45 if (line == null || line.isEmpty()) {
46 return;
47 }
48
49 processGetLatestRevision(line);
50 }
51
52 public String getLatestRevision() {
53 return latestRevision;
54 }
55
56 /**
57 * Process the current input line for the latest revision.
58 *
59 * @param line a line of text from the git log output
60 */
61 private void processGetLatestRevision(String line) {
62 Matcher matcher = LATESTREV_PATTERN.matcher(line);
63 if (matcher.matches()) {
64 latestRevision = matcher.group(1);
65 }
66 }
67 }