Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/PhasesHelper.java @ 450:03fd8d079e9c smartgit3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Share PhasesHelper instance among few HgChangesets (mostly affects HgChangesetTreeHandler case)
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 07 Jun 2012 17:06:23 +0200
parents 5787e912f60e
children 39fe00407937
rev   line source
445
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1 /*
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2 * Copyright (c) 2012 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.internal;
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18
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19 import static org.tmatesoft.hg.repo.HgPhase.Draft;
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20 import static org.tmatesoft.hg.repo.HgPhase.Secret;
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21
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22 import java.io.BufferedReader;
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23 import java.io.File;
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24 import java.io.FileReader;
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25 import java.io.IOException;
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26 import java.util.Collections;
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27 import java.util.HashMap;
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28 import java.util.LinkedList;
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29 import java.util.List;
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30
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31 import org.tmatesoft.hg.core.HgChangeset;
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32 import org.tmatesoft.hg.core.HgInvalidControlFileException;
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33 import org.tmatesoft.hg.core.Nodeid;
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34 import org.tmatesoft.hg.repo.HgChangelog;
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35 import org.tmatesoft.hg.repo.HgInternals;
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36 import org.tmatesoft.hg.repo.HgPhase;
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37 import org.tmatesoft.hg.repo.HgRepository;
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38
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39 /**
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40 * Support to deal with phases feature fo Mercurial (as of Mercutial version 2.1)
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41 *
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42 * @author Artem Tikhomirov
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43 * @author TMate Software Ltd.
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44 */
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45 public final class PhasesHelper {
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46
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47 private final HgRepository repo;
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48 private final HgChangelog.ParentWalker parentHelper;
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49 private Boolean repoSupporsPhases;
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50 private List<Nodeid> draftPhaseRoots;
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51 private List<Nodeid> secretPhaseRoots;
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52 private RevisionDescendants[][] phaseDescendants = new RevisionDescendants[HgPhase.values().length][];
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53
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54 public PhasesHelper(HgRepository hgRepo) {
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55 this(hgRepo, null);
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56 }
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57
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58 public PhasesHelper(HgRepository hgRepo, HgChangelog.ParentWalker pw) {
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59 repo = hgRepo;
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60 parentHelper = pw;
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61 }
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62
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63 public boolean isCapableOfPhases() throws HgInvalidControlFileException {
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64 if (null == repoSupporsPhases) {
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65 repoSupporsPhases = readRoots();
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66 }
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67 return repoSupporsPhases.booleanValue();
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68 }
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69
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70
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71 public HgPhase getPhase(HgChangeset cset) throws HgInvalidControlFileException {
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72 final Nodeid csetRev = cset.getNodeid();
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73 final int csetRevIndex = cset.getRevision();
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74 return getPhase(csetRevIndex, csetRev);
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75 }
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76
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77 public HgPhase getPhase(final int csetRevIndex, Nodeid csetRev) throws HgInvalidControlFileException {
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78 if (!isCapableOfPhases()) {
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79 return HgPhase.Undefined;
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80 }
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81 // csetRev is only used when parentHelper is available
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82 if (parentHelper != null && (csetRev == null || csetRev.isNull())) {
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83 csetRev = repo.getChangelog().getRevision(csetRevIndex);
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84 }
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85
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86 for (HgPhase phase : new HgPhase[] {HgPhase.Secret, HgPhase.Draft }) {
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87 List<Nodeid> roots = getPhaseRoots(phase);
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88 if (roots.isEmpty()) {
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89 continue;
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90 }
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91 if (parentHelper != null) {
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92 if (roots.contains(csetRev)) {
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93 return phase;
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94 }
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95 if (parentHelper.childrenOf(roots).contains(csetRev)) {
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96 return phase;
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97 }
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98 } else {
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99 // no parent helper
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100 // search all descendants.RevisuionDescendats includes root as well.
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101 for (RevisionDescendants rd : getPhaseDescendants(phase)) {
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102 // isCandidate is to go straight to another root if changeset was added later that the current root
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103 if (rd.isCandidate(csetRevIndex) && rd.isDescendant(csetRevIndex)) {
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104 return phase;
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105 }
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106 }
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107 }
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108 }
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109 return HgPhase.Public;
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110
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111 }
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112
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113 private Boolean readRoots() throws HgInvalidControlFileException {
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114 // FIXME shall access phaseroots through HgRepository#repoPathHelper
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115 File phaseroots = new File(HgInternals.getRepositoryDir(repo), "store/phaseroots");
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116 try {
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117 if (!phaseroots.exists()) {
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118 return Boolean.FALSE;
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119 }
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120 HashMap<HgPhase, List<Nodeid>> phase2roots = new HashMap<HgPhase, List<Nodeid>>();
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121 BufferedReader br = new BufferedReader(new FileReader(phaseroots));
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122 String line;
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123 while ((line = br.readLine()) != null) {
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124 String[] lc = line.trim().split("\\s+");
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125 if (lc.length == 0) {
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126 continue;
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127 }
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128 if (lc.length != 2) {
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129 HgInternals.getContext(repo).getLog().warn(getClass(), "Bad line in phaseroots:%s", line);
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130 continue;
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131 }
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132 int phaseIndex = Integer.parseInt(lc[0]);
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133 Nodeid rootRev = Nodeid.fromAscii(lc[1]);
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134 HgPhase phase = HgPhase.parse(phaseIndex);
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135 List<Nodeid> roots = phase2roots.get(phase);
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136 if (roots == null) {
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137 phase2roots.put(phase, roots = new LinkedList<Nodeid>());
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138 }
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139 roots.add(rootRev);
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140 }
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141 draftPhaseRoots = phase2roots.containsKey(Draft) ? phase2roots.get(Draft) : Collections.<Nodeid>emptyList();
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142 secretPhaseRoots = phase2roots.containsKey(Secret) ? phase2roots.get(Secret) : Collections.<Nodeid>emptyList();
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143 } catch (IOException ex) {
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144 throw new HgInvalidControlFileException(ex.toString(), ex, phaseroots);
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145 }
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146 return Boolean.TRUE;
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147 }
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148
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149 private List<Nodeid> getPhaseRoots(HgPhase phase) {
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150 switch (phase) {
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151 case Draft : return draftPhaseRoots;
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152 case Secret : return secretPhaseRoots;
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153 }
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154 return Collections.emptyList();
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155 }
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156
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157
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158 private RevisionDescendants[] getPhaseDescendants(HgPhase phase) throws HgInvalidControlFileException {
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159 int ordinal = phase.ordinal();
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160 if (phaseDescendants[ordinal] == null) {
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161 phaseDescendants[ordinal] = buildPhaseDescendants(phase);
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162 }
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163 return phaseDescendants[ordinal];
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164 }
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165
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166 private RevisionDescendants[] buildPhaseDescendants(HgPhase phase) throws HgInvalidControlFileException {
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167 int[] roots = toIndexes(getPhaseRoots(phase));
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168 RevisionDescendants[] rv = new RevisionDescendants[roots.length];
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169 for (int i = 0; i < roots.length; i++) {
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170 rv[i] = new RevisionDescendants(repo, roots[i]);
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171 rv[i].build();
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172 }
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173 return rv;
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174 }
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175
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176 private int[] toIndexes(List<Nodeid> roots) throws HgInvalidControlFileException {
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177 int[] rv = new int[roots.size()];
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178 for (int i = 0; i < rv.length; i++) {
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179 rv[i] = repo.getChangelog().getRevisionIndex(roots.get(i));
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180 }
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181 return rv;
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182 }
445
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183 }