Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/PhasesHelper.java @ 651:6e98d34eaca8

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author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 01 Jul 2013 21:19:53 +0200
parents 3b275cc2d2aa
children cd77bf51b562
rev   line source
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1 /*
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2 * Copyright (c) 2012-2013 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.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 import static org.tmatesoft.hg.repo.HgRepositoryFiles.Phaseroots;
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22 import static org.tmatesoft.hg.util.LogFacility.Severity.Warn;
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23
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24 import java.io.File;
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25 import java.io.FileWriter;
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26 import java.io.IOException;
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27 import java.util.ArrayList;
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28 import java.util.Collection;
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29 import java.util.Collections;
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30 import java.util.HashMap;
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31 import java.util.LinkedList;
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32 import java.util.List;
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33
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34 import org.tmatesoft.hg.core.HgChangeset;
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35 import org.tmatesoft.hg.core.HgIOException;
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36 import org.tmatesoft.hg.core.Nodeid;
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37 import org.tmatesoft.hg.repo.HgChangelog;
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38 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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39 import org.tmatesoft.hg.repo.HgParentChildMap;
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40 import org.tmatesoft.hg.repo.HgPhase;
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41 import org.tmatesoft.hg.repo.HgRepository;
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42 import org.tmatesoft.hg.repo.HgRuntimeException;
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43
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44 /**
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45 * Support to deal with Mercurial phases feature (as of Mercurial version 2.1)
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46 *
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47 * @see http://mercurial.selenic.com/wiki/Phases
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48 * @see http://mercurial.selenic.com/wiki/PhasesDevel
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49 *
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50 * @author Artem Tikhomirov
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51 * @author TMate Software Ltd.
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52 */
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53 public final class PhasesHelper {
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54
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55 private final Internals repo;
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56 private final HgParentChildMap<HgChangelog> parentHelper;
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57 private Boolean repoSupporsPhases;
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58 private List<Nodeid> draftPhaseRoots;
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59 private List<Nodeid> secretPhaseRoots;
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60 private RevisionDescendants[][] phaseDescendants = new RevisionDescendants[HgPhase.values().length][];
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61
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62 public PhasesHelper(Internals internalRepo) {
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63 this(internalRepo, null);
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64 }
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65
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66 public PhasesHelper(Internals internalRepo, HgParentChildMap<HgChangelog> pw) {
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67 repo = internalRepo;
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68 parentHelper = pw;
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69 }
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70
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71 public HgRepository getRepo() {
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72 return repo.getRepo();
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73 }
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74
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75 public boolean isCapableOfPhases() throws HgRuntimeException {
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76 if (null == repoSupporsPhases) {
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77 repoSupporsPhases = readRoots();
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78 }
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79 return repoSupporsPhases.booleanValue();
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80 }
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82 public boolean withSecretRoots() {
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83 return !secretPhaseRoots.isEmpty();
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84 }
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85
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86 /**
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87 * @param cset revision to query
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88 * @return phase of the changeset, never <code>null</code>
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89 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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90 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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91 */
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92 public HgPhase getPhase(HgChangeset cset) throws HgRuntimeException {
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93 final Nodeid csetRev = cset.getNodeid();
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94 final int csetRevIndex = cset.getRevisionIndex();
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95 return getPhase(csetRevIndex, csetRev);
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96 }
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97
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98 /**
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99 * @param csetRevIndex revision index to query
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100 * @param csetRev revision nodeid, optional
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101 * @return phase of the changeset, never <code>null</code>
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102 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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103 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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104 */
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105 public HgPhase getPhase(final int csetRevIndex, Nodeid csetRev) throws HgRuntimeException {
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106 if (!isCapableOfPhases()) {
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107 return HgPhase.Undefined;
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108 }
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109 // csetRev is only used when parentHelper is available
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110 if (parentHelper != null && (csetRev == null || csetRev.isNull())) {
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111 csetRev = getRepo().getChangelog().getRevision(csetRevIndex);
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112 }
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113
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114 for (HgPhase phase : new HgPhase[] {HgPhase.Secret, HgPhase.Draft }) {
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115 List<Nodeid> roots = getPhaseRoots(phase);
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116 if (roots.isEmpty()) {
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117 continue;
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118 }
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119 if (parentHelper != null) {
449
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120 if (roots.contains(csetRev)) {
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121 return phase;
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diff changeset
122 }
445
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123 if (parentHelper.childrenOf(roots).contains(csetRev)) {
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124 return phase;
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125 }
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126 } else {
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127 // no parent helper
449
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128 // search all descendants.RevisuionDescendats includes root as well.
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129 for (RevisionDescendants rd : getPhaseDescendants(phase)) {
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130 // isCandidate is to go straight to another root if changeset was added later that the current root
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131 if (rd.isCandidate(csetRevIndex) && rd.isDescendant(csetRevIndex)) {
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diff changeset
132 return phase;
445
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133 }
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134 }
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135 }
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136 }
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137 return HgPhase.Public;
648
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138 }
445
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139
648
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140
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141 /**
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142 * @return all revisions with secret phase
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143 */
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144 public RevisionSet allSecret() {
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145 return allOf(HgPhase.Secret);
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146 }
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147
649
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148 /**
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149 * @return all revisions with draft phase
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150 */
648
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151 public RevisionSet allDraft() {
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152 return allOf(HgPhase.Draft).subtract(allOf(HgPhase.Secret));
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153 }
649
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154
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155 public void updateRoots(Collection<Nodeid> draftRoots, Collection<Nodeid> secretRoots) throws HgInvalidControlFileException {
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156 draftPhaseRoots = draftRoots.isEmpty() ? Collections.<Nodeid>emptyList() : new ArrayList<Nodeid>(draftRoots);
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157 secretPhaseRoots = secretRoots.isEmpty() ? Collections.<Nodeid>emptyList() : new ArrayList<Nodeid>(secretRoots);
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diff changeset
158 String fmt = "%d %s\n";
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159 File phaseroots = repo.getRepositoryFile(Phaseroots);
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diff changeset
160 FileWriter fw = null;
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diff changeset
161 try {
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diff changeset
162 fw = new FileWriter(phaseroots);
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163 for (Nodeid n : secretPhaseRoots) {
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diff changeset
164 fw.write(String.format(fmt, HgPhase.Secret.mercurialOrdinal(), n.toString()));
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165 }
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166 for (Nodeid n : draftPhaseRoots) {
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167 fw.write(String.format(fmt, HgPhase.Draft.mercurialOrdinal(), n.toString()));
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168 }
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169 fw.flush();
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170 } catch (IOException ex) {
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diff changeset
171 throw new HgInvalidControlFileException(ex.getMessage(), ex, phaseroots);
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172 } finally {
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diff changeset
173 new FileUtils(repo.getLog()).closeQuietly(fw);
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174 }
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175 }
648
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176
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177 /**
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diff changeset
178 * For a given phase, collect all revisions with phase that is the same or more private (i.e. for Draft, returns Draft+Secret)
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179 * The reason is not a nice API intention (which is awful, indeed), but an ease of implementation
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180 */
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diff changeset
181 private RevisionSet allOf(HgPhase phase) {
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182 assert phase != HgPhase.Public;
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diff changeset
183 if (!isCapableOfPhases()) {
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184 return new RevisionSet(Collections.<Nodeid>emptyList());
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185 }
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diff changeset
186 final List<Nodeid> roots = getPhaseRoots(phase);
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187 if (parentHelper != null) {
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diff changeset
188 return new RevisionSet(roots).union(new RevisionSet(parentHelper.childrenOf(roots)));
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diff changeset
189 } else {
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diff changeset
190 RevisionSet rv = new RevisionSet(Collections.<Nodeid>emptyList());
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diff changeset
191 for (RevisionDescendants rd : getPhaseDescendants(phase)) {
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diff changeset
192 rv = rv.union(rd.asRevisionSet());
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193 }
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194 return rv;
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diff changeset
195 }
445
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196 }
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197
628
6526d8adbc0f Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
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diff changeset
198 private Boolean readRoots() throws HgRuntimeException {
647
c75297c17867 Location of repository files as enumeration, use file constants instead of plain names
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diff changeset
199 File phaseroots = repo.getRepositoryFile(Phaseroots);
445
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200 try {
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diff changeset
201 if (!phaseroots.exists()) {
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202 return Boolean.FALSE;
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diff changeset
203 }
649
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diff changeset
204 LineReader lr = new LineReader(phaseroots, repo.getLog());
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205 final Collection<String> lines = lr.read(new LineReader.SimpleLineCollector(), new LinkedList<String>());
445
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diff changeset
206 HashMap<HgPhase, List<Nodeid>> phase2roots = new HashMap<HgPhase, List<Nodeid>>();
649
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diff changeset
207 for (String line : lines) {
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diff changeset
208 String[] lc = line.split("\\s+");
445
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diff changeset
209 if (lc.length == 0) {
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diff changeset
210 continue;
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diff changeset
211 }
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diff changeset
212 if (lc.length != 2) {
501
d2f6ab541330 Change the way extensions are accessed (with ExtensionsManager now), add preliminary Rebase extension support
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parents: 493
diff changeset
213 repo.getSessionContext().getLog().dump(getClass(), Warn, "Bad line in phaseroots:%s", line);
445
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214 continue;
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diff changeset
215 }
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216 int phaseIndex = Integer.parseInt(lc[0]);
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217 Nodeid rootRev = Nodeid.fromAscii(lc[1]);
493
ba36f66c32b4 Refactor to keep knowledge about repository control files and their location in respect to .hg/ in a single place (facilitate future adoption of shared repositories)
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parents: 490
diff changeset
218 if (!getRepo().getChangelog().isKnown(rootRev)) {
501
d2f6ab541330 Change the way extensions are accessed (with ExtensionsManager now), add preliminary Rebase extension support
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parents: 493
diff changeset
219 repo.getSessionContext().getLog().dump(getClass(), Warn, "Phase(%d) root node %s doesn't exist in the repository, ignored.", phaseIndex, rootRev);
451
39fe00407937 HgBadStateException in ParentWalker.assertSortedIndex when phaseroots lists non-existent revision
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parents: 449
diff changeset
220 continue;
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diff changeset
221 }
445
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222 HgPhase phase = HgPhase.parse(phaseIndex);
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223 List<Nodeid> roots = phase2roots.get(phase);
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diff changeset
224 if (roots == null) {
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diff changeset
225 phase2roots.put(phase, roots = new LinkedList<Nodeid>());
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226 }
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227 roots.add(rootRev);
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228 }
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229 draftPhaseRoots = phase2roots.containsKey(Draft) ? phase2roots.get(Draft) : Collections.<Nodeid>emptyList();
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230 secretPhaseRoots = phase2roots.containsKey(Secret) ? phase2roots.get(Secret) : Collections.<Nodeid>emptyList();
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diff changeset
231 } catch (HgIOException ex) {
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diff changeset
232 throw new HgInvalidControlFileException(ex, true);
445
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233 }
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234 return Boolean.TRUE;
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235 }
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236
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237 private List<Nodeid> getPhaseRoots(HgPhase phase) {
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238 switch (phase) {
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239 case Draft : return draftPhaseRoots;
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240 case Secret : return secretPhaseRoots;
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241 }
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242 return Collections.emptyList();
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243 }
449
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244
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245
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246 private RevisionDescendants[] getPhaseDescendants(HgPhase phase) throws HgRuntimeException {
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247 int ordinal = phase.ordinal();
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248 if (phaseDescendants[ordinal] == null) {
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249 phaseDescendants[ordinal] = buildPhaseDescendants(phase);
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250 }
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251 return phaseDescendants[ordinal];
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252 }
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253
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254 private RevisionDescendants[] buildPhaseDescendants(HgPhase phase) throws HgRuntimeException {
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255 int[] roots = toIndexes(getPhaseRoots(phase));
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256 RevisionDescendants[] rv = new RevisionDescendants[roots.length];
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257 for (int i = 0; i < roots.length; i++) {
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258 rv[i] = new RevisionDescendants(getRepo(), roots[i]);
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259 rv[i].build();
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260 }
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261 return rv;
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262 }
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263
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264 private int[] toIndexes(List<Nodeid> roots) throws HgRuntimeException {
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265 int[] rv = new int[roots.size()];
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266 for (int i = 0; i < rv.length; i++) {
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267 rv[i] = getRepo().getChangelog().getRevisionIndex(roots.get(i));
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268 }
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269 return rv;
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270 }
445
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271 }