Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/PhasesHelper.java @ 648:690e71d29bf6

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Introduced RevisionSet to ease update of phase roots on push
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 25 Jun 2013 20:48:37 +0200
parents c75297c17867
children e79cf9a8130b
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.Info;
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23 import static org.tmatesoft.hg.util.LogFacility.Severity.Warn;
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24
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25 import java.io.BufferedReader;
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26 import java.io.File;
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27 import java.io.FileReader;
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28 import java.io.IOException;
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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.Nodeid;
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36 import org.tmatesoft.hg.repo.HgChangelog;
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37 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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38 import org.tmatesoft.hg.repo.HgParentChildMap;
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39 import org.tmatesoft.hg.repo.HgPhase;
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40 import org.tmatesoft.hg.repo.HgRepository;
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41 import org.tmatesoft.hg.repo.HgRuntimeException;
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42
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43 /**
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44 * Support to deal with Mercurial phases feature (as of Mercurial version 2.1)
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45 *
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46 * @see http://mercurial.selenic.com/wiki/Phases
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47 * @see http://mercurial.selenic.com/wiki/PhasesDevel
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48 *
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49 * @author Artem Tikhomirov
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50 * @author TMate Software Ltd.
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51 */
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52 public final class PhasesHelper {
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53
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54 private final Internals repo;
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55 private final HgParentChildMap<HgChangelog> parentHelper;
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56 private Boolean repoSupporsPhases;
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57 private List<Nodeid> draftPhaseRoots;
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58 private List<Nodeid> secretPhaseRoots;
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59 private RevisionDescendants[][] phaseDescendants = new RevisionDescendants[HgPhase.values().length][];
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60
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61 public PhasesHelper(Internals internalRepo) {
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62 this(internalRepo, null);
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63 }
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64
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65 public PhasesHelper(Internals internalRepo, HgParentChildMap<HgChangelog> pw) {
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66 repo = internalRepo;
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67 parentHelper = pw;
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68 }
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69
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70 public HgRepository getRepo() {
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71 return repo.getRepo();
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72 }
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73
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74 public boolean isCapableOfPhases() throws HgRuntimeException {
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75 if (null == repoSupporsPhases) {
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76 repoSupporsPhases = readRoots();
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77 }
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78 return repoSupporsPhases.booleanValue();
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79 }
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81
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82 /**
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83 * @param cset revision to query
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84 * @return phase of the changeset, never <code>null</code>
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85 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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86 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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87 */
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88 public HgPhase getPhase(HgChangeset cset) throws HgRuntimeException {
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89 final Nodeid csetRev = cset.getNodeid();
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90 final int csetRevIndex = cset.getRevisionIndex();
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91 return getPhase(csetRevIndex, csetRev);
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92 }
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93
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94 /**
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95 * @param csetRevIndex revision index to query
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96 * @param csetRev revision nodeid, optional
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97 * @return phase of the changeset, never <code>null</code>
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98 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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99 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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100 */
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101 public HgPhase getPhase(final int csetRevIndex, Nodeid csetRev) throws HgRuntimeException {
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102 if (!isCapableOfPhases()) {
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103 return HgPhase.Undefined;
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104 }
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105 // csetRev is only used when parentHelper is available
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106 if (parentHelper != null && (csetRev == null || csetRev.isNull())) {
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107 csetRev = getRepo().getChangelog().getRevision(csetRevIndex);
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108 }
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109
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110 for (HgPhase phase : new HgPhase[] {HgPhase.Secret, HgPhase.Draft }) {
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111 List<Nodeid> roots = getPhaseRoots(phase);
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112 if (roots.isEmpty()) {
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113 continue;
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114 }
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115 if (parentHelper != null) {
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diff changeset
116 if (roots.contains(csetRev)) {
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117 return phase;
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diff changeset
118 }
445
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119 if (parentHelper.childrenOf(roots).contains(csetRev)) {
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120 return phase;
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121 }
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122 } else {
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123 // no parent helper
449
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124 // search all descendants.RevisuionDescendats includes root as well.
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125 for (RevisionDescendants rd : getPhaseDescendants(phase)) {
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126 // isCandidate is to go straight to another root if changeset was added later that the current root
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127 if (rd.isCandidate(csetRevIndex) && rd.isDescendant(csetRevIndex)) {
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diff changeset
128 return phase;
445
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129 }
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130 }
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131 }
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132 }
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133 return HgPhase.Public;
648
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134 }
445
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135
648
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136
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137 /**
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138 * @return all revisions with secret phase
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139 */
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140 public RevisionSet allSecret() {
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141 return allOf(HgPhase.Secret);
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142 }
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143
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diff changeset
144 public RevisionSet allDraft() {
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145 return allOf(HgPhase.Draft).subtract(allOf(HgPhase.Secret));
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146 }
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147
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148 /**
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149 * 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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150 * The reason is not a nice API intention (which is awful, indeed), but an ease of implementation
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diff changeset
151 */
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152 private RevisionSet allOf(HgPhase phase) {
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153 assert phase != HgPhase.Public;
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154 if (!isCapableOfPhases()) {
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diff changeset
155 return new RevisionSet(Collections.<Nodeid>emptyList());
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diff changeset
156 }
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diff changeset
157 final List<Nodeid> roots = getPhaseRoots(phase);
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diff changeset
158 if (parentHelper != null) {
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diff changeset
159 return new RevisionSet(roots).union(new RevisionSet(parentHelper.childrenOf(roots)));
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diff changeset
160 } else {
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diff changeset
161 RevisionSet rv = new RevisionSet(Collections.<Nodeid>emptyList());
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diff changeset
162 for (RevisionDescendants rd : getPhaseDescendants(phase)) {
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diff changeset
163 rv = rv.union(rd.asRevisionSet());
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diff changeset
164 }
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165 return rv;
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diff changeset
166 }
445
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167 }
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168
628
6526d8adbc0f Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
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diff changeset
169 private Boolean readRoots() throws HgRuntimeException {
647
c75297c17867 Location of repository files as enumeration, use file constants instead of plain names
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parents: 628
diff changeset
170 File phaseroots = repo.getRepositoryFile(Phaseroots);
451
39fe00407937 HgBadStateException in ParentWalker.assertSortedIndex when phaseroots lists non-existent revision
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diff changeset
171 BufferedReader br = null;
445
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172 try {
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173 if (!phaseroots.exists()) {
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174 return Boolean.FALSE;
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175 }
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176 HashMap<HgPhase, List<Nodeid>> phase2roots = new HashMap<HgPhase, List<Nodeid>>();
451
39fe00407937 HgBadStateException in ParentWalker.assertSortedIndex when phaseroots lists non-existent revision
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diff changeset
177 br = new BufferedReader(new FileReader(phaseroots));
445
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178 String line;
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179 while ((line = br.readLine()) != null) {
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180 String[] lc = line.trim().split("\\s+");
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181 if (lc.length == 0) {
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182 continue;
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183 }
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184 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
185 repo.getSessionContext().getLog().dump(getClass(), Warn, "Bad line in phaseroots:%s", line);
445
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186 continue;
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187 }
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188 int phaseIndex = Integer.parseInt(lc[0]);
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189 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)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 490
diff changeset
190 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
191 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
192 continue;
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parents: 449
diff changeset
193 }
445
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194 HgPhase phase = HgPhase.parse(phaseIndex);
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195 List<Nodeid> roots = phase2roots.get(phase);
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196 if (roots == null) {
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diff changeset
197 phase2roots.put(phase, roots = new LinkedList<Nodeid>());
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198 }
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199 roots.add(rootRev);
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200 }
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201 draftPhaseRoots = phase2roots.containsKey(Draft) ? phase2roots.get(Draft) : Collections.<Nodeid>emptyList();
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202 secretPhaseRoots = phase2roots.containsKey(Secret) ? phase2roots.get(Secret) : Collections.<Nodeid>emptyList();
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diff changeset
203 } catch (IOException ex) {
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diff changeset
204 throw new HgInvalidControlFileException(ex.toString(), ex, phaseroots);
451
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diff changeset
205 } finally {
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parents: 449
diff changeset
206 if (br != null) {
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parents: 449
diff changeset
207 try {
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diff changeset
208 br.close();
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parents: 449
diff changeset
209 } catch (IOException ex) {
501
d2f6ab541330 Change the way extensions are accessed (with ExtensionsManager now), add preliminary Rebase extension support
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parents: 493
diff changeset
210 repo.getSessionContext().getLog().dump(getClass(), Info, ex, null);
451
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parents: 449
diff changeset
211 // ignore the exception otherwise
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parents: 449
diff changeset
212 }
39fe00407937 HgBadStateException in ParentWalker.assertSortedIndex when phaseroots lists non-existent revision
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parents: 449
diff changeset
213 }
445
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diff changeset
214 }
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215 return Boolean.TRUE;
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diff changeset
216 }
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217
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diff changeset
218 private List<Nodeid> getPhaseRoots(HgPhase phase) {
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diff changeset
219 switch (phase) {
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diff changeset
220 case Draft : return draftPhaseRoots;
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diff changeset
221 case Secret : return secretPhaseRoots;
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diff changeset
222 }
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diff changeset
223 return Collections.emptyList();
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parents:
diff changeset
224 }
449
5787e912f60e Speed up changeset phase detection when no parent cache is avalable
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parents: 448
diff changeset
225
5787e912f60e Speed up changeset phase detection when no parent cache is avalable
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parents: 448
diff changeset
226
628
6526d8adbc0f Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
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diff changeset
227 private RevisionDescendants[] getPhaseDescendants(HgPhase phase) throws HgRuntimeException {
447
056f724bdc21 Cache earliest phase root revision not to evaluate all the time
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parents: 446
diff changeset
228 int ordinal = phase.ordinal();
449
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diff changeset
229 if (phaseDescendants[ordinal] == null) {
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diff changeset
230 phaseDescendants[ordinal] = buildPhaseDescendants(phase);
447
056f724bdc21 Cache earliest phase root revision not to evaluate all the time
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parents: 446
diff changeset
231 }
449
5787e912f60e Speed up changeset phase detection when no parent cache is avalable
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diff changeset
232 return phaseDescendants[ordinal];
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diff changeset
233 }
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parents: 448
diff changeset
234
628
6526d8adbc0f Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
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diff changeset
235 private RevisionDescendants[] buildPhaseDescendants(HgPhase phase) throws HgRuntimeException {
449
5787e912f60e Speed up changeset phase detection when no parent cache is avalable
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parents: 448
diff changeset
236 int[] roots = toIndexes(getPhaseRoots(phase));
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237 RevisionDescendants[] rv = new RevisionDescendants[roots.length];
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238 for (int i = 0; i < roots.length; i++) {
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239 rv[i] = new RevisionDescendants(getRepo(), roots[i]);
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240 rv[i].build();
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241 }
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242 return rv;
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243 }
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244
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245 private int[] toIndexes(List<Nodeid> roots) throws HgRuntimeException {
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246 int[] rv = new int[roots.size()];
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247 for (int i = 0; i < rv.length; i++) {
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248 rv[i] = getRepo().getChangelog().getRevisionIndex(roots.get(i));
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249 }
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250 return rv;
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251 }
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252 }