org.spearce.jgit.pgm/src/org/spearce/jgit/pgm/MergeBase.java

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