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annotate src/org/tmatesoft/hg/repo/ext/Rebase.java @ 709:497e697636fc

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Report merged lines as changed block if possible, not as a sequence of added/deleted blocks. To facilitate access to merge parent lines AddBlock got mergeLineAt() method that reports index of the line in the second parent (if any), while insertedAt() has been changed to report index in the first parent always
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 21 Aug 2013 16:23:27 +0200
parents 6526d8adbc0f
children
rev   line source
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1 /*
628
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2 * Copyright (c) 2012-2013 TMate Software Ltd
501
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.repo.ext;
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18
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19 import java.io.File;
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20 import java.util.ArrayList;
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21 import java.util.HashMap;
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22 import java.util.Iterator;
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23 import java.util.Map;
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24 import java.util.NoSuchElementException;
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25
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26 import org.tmatesoft.hg.core.HgBadNodeidFormatException;
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27 import org.tmatesoft.hg.core.HgIOException;
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28 import org.tmatesoft.hg.core.Nodeid;
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29 import org.tmatesoft.hg.internal.Internals;
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30 import org.tmatesoft.hg.internal.LineReader;
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31 import org.tmatesoft.hg.repo.HgInvalidStateException;
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32
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33 /**
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34 * Support for standard Rebase extension.
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35 *
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36 * @see http://mercurial.selenic.com/wiki/RebaseExtension
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37 * @since 1.1
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38 * @author Artem Tikhomirov
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39 * @author TMate Software Ltd.
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40 */
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41 public class Rebase {
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42 private Internals repo;
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43 private Nodeid workingDirParent;
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44 private Nodeid destRevision;
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45 private Nodeid externalParent;
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46 private Map<Nodeid, Nodeid> state;
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47 private boolean collapse;
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48 private boolean keepOriginalRevisions;
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49 private boolean keepBranchNames;
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50
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51 /*package-local*/ Rebase(Internals internalRepo) {
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52 repo = internalRepo;
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53 }
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54
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55 public Rebase refresh() throws HgIOException {
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56 workingDirParent = null;
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57 destRevision = null;
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58 externalParent = null;
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59 state = null;
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60 File f = repo.getFileFromRepoDir("rebasestate");
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61 if (!f.exists()) {
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62 return this;
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63 }
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64 state = new HashMap<Nodeid, Nodeid>();
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65 try {
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66 LineReader lr = new LineReader(f, repo.getSessionContext().getLog());
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67 ArrayList<String> contents = new ArrayList<String>();
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68 lr.read(new LineReader.SimpleLineCollector(), contents);
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69 Iterator<String> it = contents.iterator();
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70 workingDirParent = Nodeid.fromAscii(it.next());
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71 destRevision = Nodeid.fromAscii(it.next());
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72 externalParent = Nodeid.fromAscii(it.next());
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73 collapse = "1".equals(it.next());
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74 keepOriginalRevisions = "1".equals(it.next());
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75 keepBranchNames = "1".equals(it.next());
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76 final String nullmerge = "-2";
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77 while (it.hasNext()) {
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78 String line = it.next();
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79 int x = line.indexOf(':');
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80 if (x == -1) {
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81 throw new HgInvalidStateException(line);
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82 }
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83 Nodeid oldRev = Nodeid.fromAscii(line.substring(0, x));
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84 Nodeid newRev;
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85 if (line.regionMatches(x+1, nullmerge, 0, nullmerge.length())) {
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86 newRev = null;
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87 } else {
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88 newRev = Nodeid.fromAscii(line.substring(x+1));
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89 }
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90 state.put(oldRev, newRev);
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91 }
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92 } catch (NoSuchElementException ex) {
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93 throw new HgIOException("Bad format of rebase state file", f);
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94 } catch (HgBadNodeidFormatException ex) {
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95 throw new HgIOException("Bad format of rebase state file", ex, f);
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96 }
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97 return this;
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98 }
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99
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100 /**
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101 * Tells whether rebase process was interrupted to manually resolve a merge
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102 * and can be resumed or aborted.
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103 *
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104 * @return <code>true</code> when rebase is in progress
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105 */
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106 public boolean isRebaseInProgress() {
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107 return state != null;
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108 }
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109
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110 public Nodeid getWorkingDirParent() {
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111 assert isRebaseInProgress();
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112 return workingDirParent;
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113 }
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114
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115 public Nodeid getTarget() {
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116 assert isRebaseInProgress();
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117 return destRevision;
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118 }
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119
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120 public Nodeid getExternalParent() {
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121 assert isRebaseInProgress();
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122 assert collapse;
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123 return externalParent;
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124 }
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125
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126 public boolean isCollapse() {
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127 return collapse;
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128 }
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129
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130 public boolean isKeepOriginalRevisions() {
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131 return keepOriginalRevisions;
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132 }
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133
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134 public boolean isKeepBranchNames() {
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135 return keepBranchNames;
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136 }
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137 }