Package org.eclipse.jgit.pgm

Source Code of org.eclipse.jgit.pgm.DiffTree

/*
* Copyright (C) 2008, Jonas Fonseca <fonseca@diku.dk>
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
*   notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
*   copyright notice, this list of conditions and the following
*   disclaimer in the documentation and/or other materials provided
*   with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
*   names of its contributors may be used to endorse or promote
*   products derived from this software without specific prior
*   written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package org.eclipse.jgit.pgm;

import java.util.ArrayList;
import java.util.List;

import org.kohsuke.args4j.Argument;
import org.kohsuke.args4j.Option;
import org.eclipse.jgit.lib.FileMode;
import org.eclipse.jgit.pgm.opt.PathTreeFilterHandler;
import org.eclipse.jgit.treewalk.AbstractTreeIterator;
import org.eclipse.jgit.treewalk.TreeWalk;
import org.eclipse.jgit.treewalk.filter.AndTreeFilter;
import org.eclipse.jgit.treewalk.filter.TreeFilter;

class DiffTree extends TextBuiltin {
  @Option(name = "--recursive", usage = "usage_recurseIntoSubtrees", aliases = { "-r" })
  private boolean recursive;

  @Argument(index = 0, metaVar = "metaVar_treeish", required = true)
  void tree_0(final AbstractTreeIterator c) {
    trees.add(c);
  }

  @Argument(index = 1, metaVar = "metaVar_treeish", required = true)
  private final List<AbstractTreeIterator> trees = new ArrayList<AbstractTreeIterator>();

  @Option(name = "--", metaVar = "metaVar_path", multiValued = true, handler = PathTreeFilterHandler.class)
  private TreeFilter pathFilter = TreeFilter.ALL;

  @Override
  protected void run() throws Exception {
    final TreeWalk walk = new TreeWalk(db);
    walk.reset();
    walk.setRecursive(recursive);
    for (final AbstractTreeIterator i : trees)
      walk.addTree(i);
    walk.setFilter(AndTreeFilter.create(TreeFilter.ANY_DIFF, pathFilter));

    final int nTree = walk.getTreeCount();
    while (walk.next()) {
      for (int i = 1; i < nTree; i++)
        out.print(':');
      for (int i = 0; i < nTree; i++) {
        final FileMode m = walk.getFileMode(i);
        final String s = m.toString();
        for (int pad = 6 - s.length(); pad > 0; pad--)
          out.print('0');
        out.print(s);
        out.print(' ');
      }

      for (int i = 0; i < nTree; i++) {
        out.print(walk.getObjectId(i).name());
        out.print(' ');
      }

      char chg = 'M';
      if (nTree == 2) {
        final int m0 = walk.getRawMode(0);
        final int m1 = walk.getRawMode(1);
        if (m0 == 0 && m1 != 0)
          chg = 'A';
        else if (m0 != 0 && m1 == 0)
          chg = 'D';
        else if (m0 != m1 && walk.idEqual(0, 1))
          chg = 'T';
      }
      out.print(chg);

      out.print('\t');
      out.print(walk.getPathString());
      out.println();
    }
  }
}
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