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annotate src/org/tmatesoft/hg/core/HgDiffCommand.java @ 679:19f5167c2155

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HgParentChildMap: deduce common ancestor functionality
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 20 Jul 2013 17:40:52 +0200
parents a20121a2bba6
children 98ff1fb49abe
rev   line source
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1 /*
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2 * Copyright (c) 2013 TMate Software Ltd
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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.core;
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18
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19 import static org.tmatesoft.hg.repo.HgRepository.NO_REVISION;
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20 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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21
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22 import org.tmatesoft.hg.internal.BlameHelper;
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23 import org.tmatesoft.hg.internal.CsetParamKeeper;
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24 import org.tmatesoft.hg.internal.FileHistory;
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25 import org.tmatesoft.hg.internal.FileRevisionHistoryChunk;
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26 import org.tmatesoft.hg.repo.HgDataFile;
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27 import org.tmatesoft.hg.repo.HgRepository;
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28 import org.tmatesoft.hg.repo.HgRuntimeException;
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29 import org.tmatesoft.hg.util.CancelSupport;
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30 import org.tmatesoft.hg.util.CancelledException;
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31 import org.tmatesoft.hg.util.Path;
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32 import org.tmatesoft.hg.util.ProgressSupport;
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33
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34 /**
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35 * 'hg diff' counterpart, with similar, although not identical, functionality.
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36 * Despite both 'hg diff' and this command are diff-based, implementation
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37 * peculiarities may lead to slightly different diff results. Either is valid
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38 * as there's no strict diff specification.
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39 *
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40 * <p>
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41 * <strong>Note</strong>, at the moment this command annotates single file only. Diff over
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42 * complete repository (all the file changed in a given changeset) might
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43 * be added later.
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44 *
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45 * @since 1.1
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46 * @author Artem Tikhomirov
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47 * @author TMate Software Ltd.
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48 */
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49 public class HgDiffCommand extends HgAbstractCommand<HgDiffCommand> {
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50
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51 private final HgRepository repo;
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52 private HgDataFile df;
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53 private final CsetParamKeeper clogRevIndexStart, clogRevIndexEnd;
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54 private HgIterateDirection iterateDirection = HgIterateDirection.NewToOld;
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55
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56 public HgDiffCommand(HgRepository hgRepo) {
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57 repo = hgRepo;
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58 clogRevIndexStart = new CsetParamKeeper(hgRepo);
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59 clogRevIndexEnd = new CsetParamKeeper(hgRepo);
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60 }
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61
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62 public HgDiffCommand file(Path file) {
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63 df = repo.getFileNode(file);
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64 return this;
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65 }
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66
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67 /**
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68 * Selects the file which history to blame, mandatory.
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69 *
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70 * @param file repository file
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71 * @return <code>this</code> for convenience
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72 */
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73 public HgDiffCommand file(HgDataFile file) {
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74 df = file;
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75 return this;
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76 }
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77
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78 /**
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79 * Select range of file's history for {@link #executeDiff(HgBlameInspector)}
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80 * and {@link #executeAnnotate(HgBlameInspector)}.
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81 * <p>
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82 * {@link #executeDiff(HgBlameInspector) diff} uses these as revisions to diff against each other, while
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83 * {@link #executeAnnotate(HgBlameInspector) annotate} walks the range.
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84 *
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85 * @param changelogRevIndexStart index of changelog revision, left range boundary
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86 * @param changelogRevIndexEnd index of changelog revision, right range boundary
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87 * @return <code>this</code> for convenience
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88 * @throws HgBadArgumentException if failed to find any of supplied changeset
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89 */
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90 public HgDiffCommand range(int changelogRevIndexStart, int changelogRevIndexEnd) throws HgBadArgumentException {
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91 clogRevIndexStart.set(changelogRevIndexStart);
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92 clogRevIndexEnd.set(changelogRevIndexEnd);
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93 return this;
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94 }
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96 /**
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97 * Selects revision for {@link #executeParentsAnnotate(HgBlameInspector)}, the one
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98 * to diff against its parents.
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99 *
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100 * Besides, it is handy when range of interest spans up to the very beginning of the file history
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101 * (and thus is equivalent to <code>range(0, changelogRevIndex)</code>)
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102 *
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103 * @param changelogRevIndex index of changelog revision
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104 * @return <code>this</code> for convenience
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105 * @throws HgBadArgumentException if failed to find supplied changeset
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106 */
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107 public HgDiffCommand changeset(int changelogRevIndex) throws HgBadArgumentException {
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108 clogRevIndexStart.set(0);
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109 clogRevIndexEnd.set(changelogRevIndex);
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110 return this;
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111 }
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112
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113 /**
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114 * Revision differences are reported in selected order when
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115 * annotating {@link #range(int, int) range} of changesets with
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116 * {@link #executeAnnotate(HgBlameInspector)}.
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117 * <p>
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118 * This method doesn't affect {@link #executeParentsAnnotate(HgBlameInspector)} and
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119 * {@link #executeDiff(HgBlameInspector)}
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120 *
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121 * @param order desired iteration order
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122 * @return <code>this</code> for convenience
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123 */
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124 public HgDiffCommand order(HgIterateDirection order) {
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125 iterateDirection = order;
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126 return this;
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127 }
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128
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129 /**
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130 * Diff two revisions selected with {@link #range(int, int)} against each other.
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131 * <p>mimics 'hg diff -r clogRevIndex1 -r clogRevIndex2'
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132 *
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133 * @throws HgCallbackTargetException propagated exception from the handler
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134 * @throws CancelledException if execution of the command was cancelled
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135 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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136 */
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137 public void executeDiff(HgBlameInspector insp) throws HgCallbackTargetException, CancelledException, HgException {
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138 checkFile();
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139 final ProgressSupport progress = getProgressSupport(insp);
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140 progress.start(2);
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141 try {
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142 final int startRevIndex = clogRevIndexStart.get(0);
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143 final int endRevIndex = clogRevIndexEnd.get(TIP);
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144 final CancelSupport cancel = getCancelSupport(insp, true);
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145 int fileRevIndex1 = fileRevIndex(df, startRevIndex);
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146 int fileRevIndex2 = fileRevIndex(df, endRevIndex);
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147 BlameHelper bh = new BlameHelper(insp);
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148 bh.prepare(df, startRevIndex, endRevIndex);
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149 progress.worked(1);
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150 cancel.checkCancelled();
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151 bh.diff(fileRevIndex1, startRevIndex, fileRevIndex2, endRevIndex);
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152 progress.worked(1);
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153 cancel.checkCancelled();
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154 } catch (HgRuntimeException ex) {
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155 throw new HgLibraryFailureException(ex);
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156 } finally {
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157 progress.done();
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158 }
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159 }
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160
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161 /**
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162 * Walk file history {@link #range(int, int) range} and report changes (diff) for each revision
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163 *
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164 * @throws HgCallbackTargetException propagated exception from the handler
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165 * @throws CancelledException if execution of the command was cancelled
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166 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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167 */
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168 public void executeAnnotate(HgBlameInspector insp) throws HgCallbackTargetException, CancelledException, HgException {
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169 checkFile();
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170 ProgressSupport progress = null;
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171 try {
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172 if (!df.exists()) {
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173 return;
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174 }
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175 final CancelSupport cancel = getCancelSupport(insp, true);
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176 BlameHelper bh = new BlameHelper(insp);
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177 final int startRevIndex = clogRevIndexStart.get(0);
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178 final int endRevIndex = clogRevIndexEnd.get(TIP);
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179 FileHistory fileHistory = bh.prepare(df, startRevIndex, endRevIndex);
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180 //
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181 cancel.checkCancelled();
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182 int totalWork = 0;
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183 for (FileRevisionHistoryChunk fhc : fileHistory.iterate(iterateDirection)) {
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184 totalWork += fhc.revisionCount();
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185 }
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186 progress = getProgressSupport(insp);
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187 progress.start(totalWork + 1);
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188 progress.worked(1); // BlameHelper.prepare
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189 //
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190 int[] fileClogParentRevs = new int[2];
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191 int[] fileParentRevs = new int[2];
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192 for (FileRevisionHistoryChunk fhc : fileHistory.iterate(iterateDirection)) {
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193 for (int fri : fhc.fileRevisions(iterateDirection)) {
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194 int clogRevIndex = fhc.changeset(fri);
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195 // the way we built fileHistory ensures we won't walk past [changelogRevIndexStart..changelogRevIndexEnd]
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196 assert clogRevIndex >= startRevIndex;
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197 assert clogRevIndex <= endRevIndex;
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198 fhc.fillFileParents(fri, fileParentRevs);
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199 fhc.fillCsetParents(fri, fileClogParentRevs);
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200 bh.annotateChange(fri, clogRevIndex, fileParentRevs, fileClogParentRevs);
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201 progress.worked(1);
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202 cancel.checkCancelled();
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203 }
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204 }
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205 } catch (HgRuntimeException ex) {
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206 throw new HgLibraryFailureException(ex);
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207 } finally {
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208 if (progress != null) {
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209 progress.done();
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210 }
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211 }
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212 }
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213
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214 /**
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215 * Annotates changes of the file against its parent(s).
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216 * Unlike {@link #annotate(HgDataFile, int, Inspector, HgIterateDirection)}, doesn't
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217 * walk file history, looks at the specified revision only. Handles both parents (if merge revision).
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218 *
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219 * @throws HgCallbackTargetException propagated exception from the handler
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220 * @throws CancelledException if execution of the command was cancelled
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221 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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222 */
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223 public void executeParentsAnnotate(HgBlameInspector insp) throws HgCallbackTargetException, CancelledException, HgException {
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224 checkFile();
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225 final ProgressSupport progress = getProgressSupport(insp);
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226 progress.start(2);
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227 try {
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228 final CancelSupport cancel = getCancelSupport(insp, true);
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229 int changelogRevisionIndex = clogRevIndexEnd.get();
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230 // TODO detect if file is text/binary (e.g. looking for chars < ' ' and not \t\r\n\f
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231 int fileRevIndex = fileRevIndex(df, changelogRevisionIndex);
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232 int[] fileRevParents = new int[2];
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233 df.parents(fileRevIndex, fileRevParents, null, null);
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234 if (changelogRevisionIndex == TIP) {
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235 changelogRevisionIndex = df.getChangesetRevisionIndex(fileRevIndex);
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236 }
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237 int[] fileClogParentRevs = new int[2];
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238 fileClogParentRevs[0] = fileRevParents[0] == NO_REVISION ? NO_REVISION : df.getChangesetRevisionIndex(fileRevParents[0]);
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239 fileClogParentRevs[1] = fileRevParents[1] == NO_REVISION ? NO_REVISION : df.getChangesetRevisionIndex(fileRevParents[1]);
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240 BlameHelper bh = new BlameHelper(insp);
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241 int clogIndexStart = fileClogParentRevs[0] == NO_REVISION ? (fileClogParentRevs[1] == NO_REVISION ? 0 : fileClogParentRevs[1]) : fileClogParentRevs[0];
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242 bh.prepare(df, clogIndexStart, changelogRevisionIndex);
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243 progress.worked(1);
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244 cancel.checkCancelled();
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245 bh.annotateChange(fileRevIndex, changelogRevisionIndex, fileRevParents, fileClogParentRevs);
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246 progress.worked(1);
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247 cancel.checkCancelled();
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248 } catch (HgRuntimeException ex) {
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249 throw new HgLibraryFailureException(ex);
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250 } finally {
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251 progress.done();
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252 }
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253 }
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254
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255 private void checkFile() {
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256 if (df == null) {
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257 throw new IllegalArgumentException("File is not set");
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258 }
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259 }
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260
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261 private static int fileRevIndex(HgDataFile df, int csetRevIndex) throws HgRuntimeException {
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262 Nodeid fileRev = df.getRepo().getManifest().getFileRevision(csetRevIndex, df.getPath());
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263 return df.getRevisionIndex(fileRev);
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264 }
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265 }