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1   /*
2    * Copyright (C) 2008, Jonas Fonseca <fonseca@diku.dk>
3    * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
4    * and other copyright owners as documented in the project's IP log.
5    *
6    * This program and the accompanying materials are made available
7    * under the terms of the Eclipse Distribution License v1.0 which
8    * accompanies this distribution, is reproduced below, and is
9    * available at http://www.eclipse.org/org/documents/edl-v10.php
10   *
11   * All rights reserved.
12   *
13   * Redistribution and use in source and binary forms, with or
14   * without modification, are permitted provided that the following
15   * conditions are met:
16   *
17   * - Redistributions of source code must retain the above copyright
18   *   notice, this list of conditions and the following disclaimer.
19   *
20   * - Redistributions in binary form must reproduce the above
21   *   copyright notice, this list of conditions and the following
22   *   disclaimer in the documentation and/or other materials provided
23   *   with the distribution.
24   *
25   * - Neither the name of the Eclipse Foundation, Inc. nor the
26   *   names of its contributors may be used to endorse or promote
27   *   products derived from this software without specific prior
28   *   written permission.
29   *
30   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
31   * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
32   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
33   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
35   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
37   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
38   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
39   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
42   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43   */
44  
45  package org.eclipse.jgit.pgm;
46  
47  import java.util.ArrayList;
48  import java.util.List;
49  
50  import org.eclipse.jgit.revwalk.RevCommit;
51  import org.eclipse.jgit.revwalk.filter.RevFilter;
52  import org.kohsuke.args4j.Argument;
53  import org.kohsuke.args4j.Option;
54  
55  @Command(usage = "usage_MergeBase")
56  class MergeBase extends TextBuiltin {
57  	@Option(name = "--all", usage = "usage_displayAllPossibleMergeBases")
58  	private boolean all;
59  
60  	@Argument(index = 0, metaVar = "metaVar_commitish", required = true)
61  	void commit_0(final RevCommit c) {
62  		commits.add(c);
63  	}
64  
65  	@Argument(index = 1, metaVar = "metaVar_commitish", required = true)
66  	private List<RevCommit> commits = new ArrayList<>();
67  
68  	/** {@inheritDoc} */
69  	@Override
70  	protected void run() throws Exception {
71  		for (RevCommit c : commits)
72  			argWalk.markStart(c);
73  		argWalk.setRevFilter(RevFilter.MERGE_BASE);
74  		int max = all ? Integer.MAX_VALUE : 1;
75  		while (max-- > 0) {
76  			final RevCommit b = argWalk.next();
77  			if (b == null)
78  				break;
79  			outw.println(b.getId().name());
80  		}
81  	}
82  }