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 */
30 public class GitLatestRevisionCommandConsumer extends AbstractConsumer {
31
32 /**
33 * The pattern used to match git log latest revision lines
34 */
35 private static final Pattern LATESTREV_PATTERN = Pattern.compile("^commit \\s*(.*)");
36
37 private String latestRevision;
38
39 /** {@inheritDoc} */
40 public void consumeLine(String line) {
41 if (logger.isDebugEnabled()) {
42 logger.debug("GitLatestRevisionCommandConsumer consumeLine : " + line);
43 }
44 if (line == null || (line == null || line.isEmpty())) {
45 return;
46 }
47
48 processGetLatestRevision(line);
49 }
50
51 public String getLatestRevision() {
52 return latestRevision;
53 }
54
55 /**
56 * Process the current input line for the latest revision
57 *
58 * @param line A line of text from the git log output
59 */
60 private void processGetLatestRevision(String line) {
61 Matcher matcher = LATESTREV_PATTERN.matcher(line);
62 if (matcher.matches()) {
63 latestRevision = matcher.group(1);
64 }
65 }
66 }