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annotate src/org/tmatesoft/hg/core/HgIncomingCommand.java @ 705:b4242b7e7dfe

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Merge command: implement conflict resolution alternatives
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 15 Aug 2013 18:43:50 +0200
parents 822f3a83ff57
children
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1 /*
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2 * Copyright (c) 2011-2013 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 java.util.ArrayList;
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20 import java.util.HashSet;
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21 import java.util.Iterator;
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22 import java.util.LinkedHashSet;
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23 import java.util.LinkedList;
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24 import java.util.List;
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25 import java.util.Set;
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26 import java.util.TreeSet;
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27
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28 import org.tmatesoft.hg.internal.Internals;
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29 import org.tmatesoft.hg.internal.RepositoryComparator;
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30 import org.tmatesoft.hg.internal.RepositoryComparator.BranchChain;
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31 import org.tmatesoft.hg.repo.HgBundle;
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32 import org.tmatesoft.hg.repo.HgChangelog;
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33 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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34 import org.tmatesoft.hg.repo.HgInvalidStateException;
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35 import org.tmatesoft.hg.repo.HgParentChildMap;
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36 import org.tmatesoft.hg.repo.HgRemoteRepository;
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37 import org.tmatesoft.hg.repo.HgRepository;
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38 import org.tmatesoft.hg.repo.HgRuntimeException;
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39 import org.tmatesoft.hg.util.CancelledException;
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40 import org.tmatesoft.hg.util.ProgressSupport;
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42 /**
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43 * Command to find out changes available in a remote repository, missing locally.
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44 *
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45 * @author Artem Tikhomirov
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46 * @author TMate Software Ltd.
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47 */
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48 public class HgIncomingCommand extends HgAbstractCommand<HgIncomingCommand> {
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49
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50 private final HgRepository localRepo;
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51 private HgRemoteRepository remoteRepo;
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52 @SuppressWarnings("unused")
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53 private boolean includeSubrepo;
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54 private RepositoryComparator comparator;
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55 private List<BranchChain> missingBranches;
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56 private HgParentChildMap<HgChangelog> parentHelper;
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57 private Set<String> branches;
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59 public HgIncomingCommand(HgRepository hgRepo) {
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60 localRepo = hgRepo;
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61 }
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62
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63 public HgIncomingCommand against(HgRemoteRepository hgRemote) {
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64 remoteRepo = hgRemote;
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65 comparator = null;
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66 missingBranches = null;
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67 return this;
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68 }
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70 /**
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71 * Select specific branch to push.
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72 * Multiple branch specification possible (changeset from any of these would be included in result).
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73 * Note, {@link #executeLite()} does not respect this setting.
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74 *
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75 * @param branch - branch name, case-sensitive, non-null.
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76 * @return <code>this</code> for convenience
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77 * @throws IllegalArgumentException when branch argument is null
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78 */
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79 public HgIncomingCommand branch(String branch) {
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80 if (branch == null) {
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81 throw new IllegalArgumentException();
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82 }
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83 if (branches == null) {
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84 branches = new TreeSet<String>();
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85 }
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86 branches.add(branch);
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87 return this;
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88 }
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90 /**
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91 * PLACEHOLDER, NOT IMPLEMENTED YET.
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92 *
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93 * Whether to include sub-repositories when collecting changes, default is <code>true</code> XXX or false?
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94 * @return <code>this</code> for convenience
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95 */
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96 public HgIncomingCommand subrepo(boolean include) {
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97 includeSubrepo = include;
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98 throw Internals.notImplemented();
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99 }
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101 /**
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102 * Lightweight check for incoming changes, gives only list of revisions to pull.
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103 * Reported changes are from any branch (limits set by {@link #branch(String)} are not taken into account.
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104 *
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105 * @return list of nodes present at remote and missing locally
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106 * @throws HgRemoteConnectionException when failed to communicate with remote repository
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107 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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108 * @throws CancelledException if execution of the command was cancelled
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109 */
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110 public List<Nodeid> executeLite() throws HgException, CancelledException {
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111 try {
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112 LinkedHashSet<Nodeid> result = new LinkedHashSet<Nodeid>();
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113 RepositoryComparator repoCompare = getComparator();
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114 for (BranchChain bc : getMissingBranches()) {
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115 List<Nodeid> missing = repoCompare.visitBranches(bc);
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116 HashSet<Nodeid> common = new HashSet<Nodeid>(); // ordering is irrelevant
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117 repoCompare.collectKnownRoots(bc, common);
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118 // missing could only start with common elements. Once non-common, rest is just distinct branch revision trails.
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119 for (Iterator<Nodeid> it = missing.iterator(); it.hasNext() && common.contains(it.next()); it.remove()) ;
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120 result.addAll(missing);
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121 }
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122 ArrayList<Nodeid> rv = new ArrayList<Nodeid>(result);
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123 return rv;
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124 } catch (HgRuntimeException ex) {
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125 throw new HgLibraryFailureException(ex);
192
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126 }
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127 }
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128
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129 /**
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130 * Full information about incoming changes
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131 *
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132 * @throws HgCallbackTargetException to re-throw exception from the handler
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133 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
380
9517df1ef7ec Comments/javadoc
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134 * @throws CancelledException if execution of the command was cancelled
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135 */
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136 public void executeFull(final HgChangesetHandler handler) throws HgCallbackTargetException, HgException, CancelledException {
192
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137 if (handler == null) {
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138 throw new IllegalArgumentException("Delegate can't be null");
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139 }
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140 final ProgressSupport ps = getProgressSupport(handler);
192
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141 try {
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142 final List<Nodeid> common = getCommon();
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143 HgBundle changegroup = remoteRepo.getChanges(common);
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144 final ChangesetTransformer transformer = new ChangesetTransformer(localRepo, handler, getParentHelper(), ps, getCancelSupport(handler, true));
215
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145 transformer.limitBranches(branches);
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146 changegroup.changes(localRepo, new HgChangelog.Inspector() {
208
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147 private int localIndex;
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148 private final HgParentChildMap<HgChangelog> parentHelper;
208
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149
192
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150 {
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151 parentHelper = getParentHelper();
208
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152 // new revisions, if any, would be added after all existing, and would get numbered started with last+1
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153 localIndex = localRepo.getChangelog().getRevisionCount();
192
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154 }
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155
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156 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) throws HgRuntimeException {
192
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157 if (parentHelper.knownNode(nodeid)) {
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158 // FIXME getCommon() and remote.changegroup do not work together nicely.
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159 // e.g. for hgtest-annotate-merge repository and TestIncoming, common reports r0 and r5 (ancestor of r5)
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160 // because there's a distinct branch from r0 (in addition to those after r5).
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161 // remote.changegroup however answers with revisions that are children of either,
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162 /// so revisions 0..5 are reported as well and the next check fails. Instead, shall pass
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163 // not common, but 'first to load' to remote.changegroup() or use another method (e.g. getbundle)
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164 // Note, sending r5 only (i.e. checking for ancestors in common) won't help, changegroup sends children of
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165 // requested roots only, and doesn't look for anything else
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166 // if (!common.contains(nodeid)) {
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167 // throw new HgInvalidStateException("Bundle shall not report known nodes other than roots we've supplied");
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168 // }
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169 return;
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170 }
208
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171 transformer.next(localIndex++, nodeid, cset);
192
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172 }
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173 });
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174 transformer.checkFailure();
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175 } catch (HgRuntimeException ex) {
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176 throw new HgLibraryFailureException(ex);
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177 } finally {
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178 ps.done();
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179 }
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180 }
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181
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182 private RepositoryComparator getComparator() throws CancelledException, HgRuntimeException {
192
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183 if (remoteRepo == null) {
215
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184 throw new IllegalArgumentException("Shall specify remote repository to compare against", null);
192
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185 }
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186 if (comparator == null) {
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187 comparator = new RepositoryComparator(getParentHelper(), remoteRepo);
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188 // comparator.compare(context); // XXX meanwhile we use distinct path to calculate common
192
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189 }
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190 return comparator;
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191 }
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192
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193 private HgParentChildMap<HgChangelog> getParentHelper() throws HgRuntimeException {
192
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194 if (parentHelper == null) {
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195 parentHelper = new HgParentChildMap<HgChangelog>(localRepo.getChangelog());
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196 parentHelper.init();
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197 }
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198 return parentHelper;
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199 }
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200
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201 private List<BranchChain> getMissingBranches() throws HgRemoteConnectionException, CancelledException, HgRuntimeException {
192
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202 if (missingBranches == null) {
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203 missingBranches = getComparator().calculateMissingBranches();
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204 }
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205 return missingBranches;
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206 }
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207
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208 private List<Nodeid> getCommon() throws HgRemoteConnectionException, CancelledException, HgRuntimeException {
202
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209 // return getComparator(context).getCommon();
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210 final LinkedHashSet<Nodeid> common = new LinkedHashSet<Nodeid>();
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211 // XXX common can be obtained from repoCompare, but at the moment it would almost duplicate work of calculateMissingBranches
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212 // once I refactor latter, common shall be taken from repoCompare.
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213 RepositoryComparator repoCompare = getComparator();
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214 for (BranchChain bc : getMissingBranches()) {
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215 repoCompare.collectKnownRoots(bc, common);
192
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216 }
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217 return new LinkedList<Nodeid>(common);
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218 }
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219 }