Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/PhasesHelper.java @ 446:9f0e6dfd417e smartgit3

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Workaround for a Revlog#walk defect for the price of (almost) complete repo walk
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 05 Jun 2012 21:18:20 +0200
parents d0e5dc3cae6e
children 056f724bdc21
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.Arrays;
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27 import java.util.Collections;
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28 import java.util.HashMap;
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29 import java.util.HashSet;
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30 import java.util.LinkedList;
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31 import java.util.List;
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32
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33 import org.tmatesoft.hg.core.HgChangeset;
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34 import org.tmatesoft.hg.core.HgInvalidControlFileException;
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35 import org.tmatesoft.hg.core.Nodeid;
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36 import org.tmatesoft.hg.repo.HgChangelog;
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37 import org.tmatesoft.hg.repo.HgInternals;
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38 import org.tmatesoft.hg.repo.HgPhase;
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39 import org.tmatesoft.hg.repo.HgRepository;
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40
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41 /**
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42 * Support to deal with phases feature fo Mercurial (as of Mercutial version 2.1)
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43 *
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44 * @author Artem Tikhomirov
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45 * @author TMate Software Ltd.
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46 */
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47 public final class PhasesHelper {
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48
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49 private final HgRepository hgRepo;
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50 private final HgChangelog.ParentWalker parentHelper;
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51 private Boolean repoSupporsPhases;
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52 private List<Nodeid> draftPhaseRoots;
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53 private List<Nodeid> secretPhaseRoots;
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54
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55 public PhasesHelper(HgRepository repo) {
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56 this(repo, null);
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57 }
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58
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59 public PhasesHelper(HgRepository repo, HgChangelog.ParentWalker pw) {
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60 hgRepo = repo;
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61 parentHelper = pw;
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62 }
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63
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64 public boolean isCapableOfPhases() throws HgInvalidControlFileException {
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65 if (null == repoSupporsPhases) {
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66 repoSupporsPhases = readRoots();
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67 }
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68 return repoSupporsPhases.booleanValue();
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69 }
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70
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71
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72 public HgPhase getPhase(HgChangeset cset) throws HgInvalidControlFileException {
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73 final Nodeid csetRev = cset.getNodeid();
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74 final int csetRevIndex = cset.getRevision();
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75 return getPhase(csetRevIndex, csetRev);
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76 }
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77
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78 public HgPhase getPhase(final int csetRevIndex, Nodeid csetRev) throws HgInvalidControlFileException {
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79 if (!isCapableOfPhases()) {
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80 return HgPhase.Undefined;
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81 }
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82 if (csetRev == null || csetRev.isNull()) {
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83 csetRev = hgRepo.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 (roots.contains(csetRev)) {
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92 return phase;
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93 }
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94 if (parentHelper != null) {
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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
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101 int[] rootIndexes = toIndexes(roots);
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102 Arrays.sort(rootIndexes);
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103 if (rootIndexes[0] > csetRevIndex) {
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104 // this phase started later than our changeset was added, try another phase
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105 continue;
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106 }
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107 /*
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108 * TODO descendants() method to build a BitSet with 1 at index of those that are descendants
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109 * wrap it into a class with root nodeid to
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110 * (a) collect only for a subset of repository,
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111 * (b) be able to answer isDescendant(int csetRevIndex) using absolute indexing (i.e bitAt(csetRevIndex - rootRevIndex))
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112 */
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113 final HashSet<Nodeid> parents2consider = new HashSet<Nodeid>(roots);
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114 final boolean[] result = new boolean[] { false };
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115 hgRepo.getChangelog().walk(0/*rootIndexes[0]*/, csetRevIndex, new HgChangelog.ParentInspector() {
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116
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117 public void next(int revisionIndex, Nodeid revision, int parent1, int parent2, Nodeid nidParent1, Nodeid nidParent2) {
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118 boolean descendant = false;
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119 if (!nidParent1.isNull() && parents2consider.contains(nidParent1)) {
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120 parents2consider.add(revision);
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121 descendant = true;
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122 }
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123 if (!nidParent2.isNull() && parents2consider.contains(nidParent2)) {
446
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124 parents2consider.add(revision);
445
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125 descendant = true;
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126 }
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127 if (descendant && revisionIndex == csetRevIndex) {
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128 // revision of interest descends from one of the roots
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129 result[0] = true;
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130 }
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131 }
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132 });
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133 if (result[0]) {
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134 return phase;
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135 }
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136 }
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137 }
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138 return HgPhase.Public;
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139
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140 }
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141
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142
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143 private int[] toIndexes(List<Nodeid> roots) throws HgInvalidControlFileException {
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144 int[] rv = new int[roots.size()];
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145 for (int i = 0; i < rv.length; i++) {
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146 rv[i] = hgRepo.getChangelog().getRevisionIndex(roots.get(i));
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147 }
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148 return rv;
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149 }
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150
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151 private Boolean readRoots() throws HgInvalidControlFileException {
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152 // FIXME shall access phaseroots through HgRepository#repoPathHelper
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153 File phaseroots = new File(HgInternals.getRepositoryDir(hgRepo), "store/phaseroots");
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154 try {
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155 if (!phaseroots.exists()) {
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156 return Boolean.FALSE;
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157 }
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158 HashMap<HgPhase, List<Nodeid>> phase2roots = new HashMap<HgPhase, List<Nodeid>>();
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159 BufferedReader br = new BufferedReader(new FileReader(phaseroots));
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160 String line;
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161 while ((line = br.readLine()) != null) {
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162 String[] lc = line.trim().split("\\s+");
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163 if (lc.length == 0) {
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164 continue;
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165 }
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166 if (lc.length != 2) {
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parents:
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167 HgInternals.getContext(hgRepo).getLog().warn(getClass(), "Bad line in phaseroots:%s", line);
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168 continue;
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169 }
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170 int phaseIndex = Integer.parseInt(lc[0]);
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171 Nodeid rootRev = Nodeid.fromAscii(lc[1]);
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172 HgPhase phase = HgPhase.parse(phaseIndex);
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173 List<Nodeid> roots = phase2roots.get(phase);
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174 if (roots == null) {
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175 phase2roots.put(phase, roots = new LinkedList<Nodeid>());
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176 }
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177 roots.add(rootRev);
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178 }
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179 draftPhaseRoots = phase2roots.containsKey(Draft) ? phase2roots.get(Draft) : Collections.<Nodeid>emptyList();
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180 secretPhaseRoots = phase2roots.containsKey(Secret) ? phase2roots.get(Secret) : Collections.<Nodeid>emptyList();
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parents:
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181 } catch (IOException ex) {
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parents:
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182 throw new HgInvalidControlFileException(ex.toString(), ex, phaseroots);
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parents:
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183 }
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184 return Boolean.TRUE;
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185 }
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parents:
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186
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187 private List<Nodeid> getPhaseRoots(HgPhase phase) {
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parents:
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188 switch (phase) {
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parents:
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189 case Draft : return draftPhaseRoots;
d0e5dc3cae6e Support for phases functionality from Mercurial 2.1
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parents:
diff changeset
190 case Secret : return secretPhaseRoots;
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parents:
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191 }
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parents:
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192 return Collections.emptyList();
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parents:
diff changeset
193 }
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parents:
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194 }