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annotate src/org/tmatesoft/hg/core/HgStatusCommand.java @ 678:8625cba0a5a8

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Towards better blame of merge revisions: refactor merge handling strategy
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 19 Jul 2013 15:36:29 +0200
parents 90df078d6418
children 98ff1fb49abe
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 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.core;
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18
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19 import static org.tmatesoft.hg.core.HgStatus.Kind.*;
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20 import static org.tmatesoft.hg.repo.HgInternals.wrongRevisionIndex;
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21 import static org.tmatesoft.hg.repo.HgRepository.*;
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22
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23 import java.io.IOException;
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24 import java.util.ConcurrentModificationException;
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26 import org.tmatesoft.hg.internal.AdapterPlug;
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27 import org.tmatesoft.hg.internal.ChangelogHelper;
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28 import org.tmatesoft.hg.internal.Internals;
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6f1b88693d48 Complete refactoring to org.tmatesoft
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29 import org.tmatesoft.hg.repo.HgRepository;
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30 import org.tmatesoft.hg.repo.HgRuntimeException;
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31 import org.tmatesoft.hg.repo.HgStatusCollector;
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32 import org.tmatesoft.hg.repo.HgStatusInspector;
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33 import org.tmatesoft.hg.repo.HgWorkingCopyStatusCollector;
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34 import org.tmatesoft.hg.util.Adaptable;
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35 import org.tmatesoft.hg.util.CancelSupport;
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36 import org.tmatesoft.hg.util.CancelledException;
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37 import org.tmatesoft.hg.util.Path;
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38 import org.tmatesoft.hg.util.Outcome;
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40 /**
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41 * Command to obtain file status information, 'hg status' counterpart.
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42 *
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43 * @author Artem Tikhomirov
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44 * @author TMate Software Ltd.
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45 */
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46 public class HgStatusCommand extends HgAbstractCommand<HgStatusCommand> {
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47 private final HgRepository repo;
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48
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49 private int startRevision = TIP;
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50 private int endRevision = WORKING_COPY;
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51 private Path.Matcher scope;
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52
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53 private final Mediator mediator = new Mediator();
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54
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55 public HgStatusCommand(HgRepository hgRepo) {
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56 repo = hgRepo;
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57 defaults();
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58 }
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59
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60 public HgStatusCommand defaults() {
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61 final Mediator m = mediator;
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62 m.needModified = m.needAdded = m.needRemoved = m.needUnknown = m.needMissing = true;
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63 m.needCopies = m.needClean = m.needIgnored = false;
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64 return this;
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65 }
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66 public HgStatusCommand all() {
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67 final Mediator m = mediator;
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68 m.needModified = m.needAdded = m.needRemoved = m.needUnknown = m.needMissing = true;
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69 m.needCopies = m.needClean = m.needIgnored = true;
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70 return this;
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71 }
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74 public HgStatusCommand modified(boolean include) {
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75 mediator.needModified = include;
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76 return this;
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77 }
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78 public HgStatusCommand added(boolean include) {
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79 mediator.needAdded = include;
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80 return this;
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81 }
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82 public HgStatusCommand removed(boolean include) {
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83 mediator.needRemoved = include;
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84 return this;
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85 }
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86 public HgStatusCommand deleted(boolean include) {
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87 mediator.needMissing = include;
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88 return this;
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89 }
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90 public HgStatusCommand unknown(boolean include) {
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91 mediator.needUnknown = include;
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92 return this;
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93 }
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94 public HgStatusCommand clean(boolean include) {
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95 mediator.needClean = include;
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96 return this;
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97 }
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98 public HgStatusCommand ignored(boolean include) {
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99 mediator.needIgnored = include;
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100 return this;
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101 }
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102
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103 /**
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104 * If set, either base:revision or base:workingdir
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105 * to unset, pass {@link HgRepository#TIP} or {@link HgRepository#BAD_REVISION}
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106 * @param changesetRevisionIndex - local index of a changeset to base status from
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107 * @return <code>this</code> for convenience
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108 * @throws IllegalArgumentException when revision is negative or {@link HgRepository#WORKING_COPY}
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109 */
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110 public HgStatusCommand base(int changesetRevisionIndex) {
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111 if (changesetRevisionIndex == WORKING_COPY || wrongRevisionIndex(changesetRevisionIndex)) {
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112 throw new IllegalArgumentException(String.valueOf(changesetRevisionIndex));
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113 }
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114 if (changesetRevisionIndex == BAD_REVISION) {
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115 changesetRevisionIndex = TIP;
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116 }
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117 startRevision = changesetRevisionIndex;
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118 return this;
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119 }
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120
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121 /**
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122 * Revision without base == --change
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123 * Pass {@link HgRepository#WORKING_COPY} or {@link HgRepository#BAD_REVISION} to reset
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124 * @param changesetRevisionIndex - non-negative changeset revision local index, or any of {@link HgRepository#BAD_REVISION}, {@link HgRepository#WORKING_COPY} or {@link HgRepository#TIP}
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125 * @return <code>this</code> for convenience
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126 * @throws IllegalArgumentException if revision index doesn't specify legitimate revision.
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127 */
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128 public HgStatusCommand revision(int changesetRevisionIndex) {
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129 if (changesetRevisionIndex == BAD_REVISION) {
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130 changesetRevisionIndex = WORKING_COPY;
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131 }
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132 if (wrongRevisionIndex(changesetRevisionIndex)) {
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133 throw new IllegalArgumentException(String.valueOf(changesetRevisionIndex));
143
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134 }
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135 endRevision = changesetRevisionIndex;
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136 return this;
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137 }
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138
143
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139 /**
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140 * Shorthand for {@link #base(int) cmd.base(BAD_REVISION)}{@link #change(int) .revision(revision)}
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141 *
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142 * @param changesetRevisionIndex compare given revision against its parent
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143 * @return <code>this</code> for convenience
143
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144 */
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145 public HgStatusCommand change(int changesetRevisionIndex) {
143
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146 base(BAD_REVISION);
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147 return revision(changesetRevisionIndex);
143
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148 }
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149
148
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150 /**
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151 * Limit status operation to certain sub-tree.
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152 *
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153 * @param scopeMatcher - matcher to use, pass <code>null/<code> to reset
148
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154 * @return <code>this</code> for convenience
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155 */
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156 public HgStatusCommand match(Path.Matcher scopeMatcher) {
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157 scope = scopeMatcher;
123
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158 return this;
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159 }
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160
131
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161 public HgStatusCommand subrepo(boolean visit) {
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162 throw Internals.notImplemented();
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163 }
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164
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165 /**
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166 * Perform status operation according to parameters set.
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167 *
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168 * @param statusHandler callback to get status information
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169 * @throws HgCallbackTargetException propagated exception from the handler
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170 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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171 * @throws IOException if there are (further unspecified) errors while walking working copy
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172 * @throws CancelledException if execution of the command was cancelled
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173 * @throws IllegalArgumentException if handler is <code>null</code>
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174 * @throws ConcurrentModificationException if this command already runs (i.e. being used from another thread)
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175 */
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176 public void execute(HgStatusHandler statusHandler) throws HgCallbackTargetException, HgException, IOException, CancelledException {
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177 if (statusHandler == null) {
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178 throw new IllegalArgumentException();
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179 }
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180 if (mediator.busy()) {
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181 throw new ConcurrentModificationException();
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182 }
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183 HgStatusCollector sc = new HgStatusCollector(repo); // TODO from CommandContext
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184 // PathPool pathHelper = new PathPool(repo.getPathHelper()); // TODO from CommandContext
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185 try {
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186 // XXX if I need a rough estimation (for ProgressMonitor) of number of work units,
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187 // I may use number of files in either rev1 or rev2 manifest edition
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188 mediator.start(statusHandler, getCancelSupport(statusHandler, true), new ChangelogHelper(repo, startRevision));
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189 if (endRevision == WORKING_COPY) {
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190 HgWorkingCopyStatusCollector wcsc = scope != null ? HgWorkingCopyStatusCollector.create(repo, scope) : new HgWorkingCopyStatusCollector(repo);
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191 wcsc.setBaseRevisionCollector(sc);
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192 wcsc.walk(startRevision, mediator);
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193 } else {
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194 sc.setScope(scope); // explicitly set, even if null - would be handy once we reuse StatusCollector
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195 if (startRevision == TIP) {
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196 sc.change(endRevision, mediator);
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197 } else {
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198 sc.walk(startRevision, endRevision, mediator);
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199 }
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200 }
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201 mediator.checkFailure();
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202 } catch (HgRuntimeException ex) {
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203 throw new HgLibraryFailureException(ex);
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204 } finally {
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205 mediator.done();
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206 }
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207 }
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208
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209 private class Mediator extends AdapterPlug implements HgStatusInspector, Adaptable {
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210 boolean needModified;
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211 boolean needAdded;
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212 boolean needRemoved;
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213 boolean needUnknown;
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214 boolean needMissing;
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215 boolean needClean;
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216 boolean needIgnored;
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217 boolean needCopies;
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218 HgStatusHandler handler;
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219 private ChangelogHelper logHelper;
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220 private HgCallbackTargetException failure;
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221
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222 Mediator() {
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223 }
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224
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225 public void start(HgStatusHandler h, CancelSupport hcs, ChangelogHelper changelogHelper) {
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226 handler = h;
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227 super.attachAdapter(CancelSupport.class, hcs);
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228 logHelper = changelogHelper;
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229 }
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230
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231 public void done() {
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232 handler = null;
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233 super.detachAdapter(CancelSupport.class);
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234 logHelper = null;
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235 failure = null;
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236 }
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237
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238 public boolean busy() {
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239 return handler != null;
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240 }
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241
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242 // XXX similar code in ChangesetTransformer
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243 public void checkFailure() throws HgCallbackTargetException {
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244 // do not forget to clear exceptions for reuse of this instance
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245 if (failure != null) {
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246 HgCallbackTargetException toThrow = failure;
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247 failure = null;
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248 throw toThrow;
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249 }
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250 }
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251
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252 private void dispatch(HgStatus s) {
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253 try {
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254 handler.status(s);
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255 } catch (HgCallbackTargetException ex) {
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256 failure = ex;
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257 }
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258 }
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259
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260 public void modified(Path fname) {
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261 if (needModified) {
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262 dispatch(new HgStatus(Modified, fname, logHelper));
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263 }
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264 }
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265 public void added(Path fname) {
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266 if (needAdded) {
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267 dispatch(new HgStatus(Added, fname, logHelper));
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268 }
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269 }
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270 public void removed(Path fname) {
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271 if (needRemoved) {
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272 dispatch(new HgStatus(Removed, fname, logHelper));
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273 }
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274 }
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275 public void copied(Path fnameOrigin, Path fnameAdded) {
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276 if (needCopies) {
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277 // TODO post-1.0 in fact, merged files may report 'copied from' as well, correct status kind thus may differ from Added
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278 dispatch(new HgStatus(Added, fnameAdded, fnameOrigin, logHelper));
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279 }
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280 }
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281 public void missing(Path fname) {
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282 if (needMissing) {
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283 dispatch(new HgStatus(Missing, fname, logHelper));
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284 }
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285 }
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286 public void unknown(Path fname) {
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287 if (needUnknown) {
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288 dispatch(new HgStatus(Unknown, fname, logHelper));
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289 }
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290 }
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291 public void clean(Path fname) {
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292 if (needClean) {
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293 dispatch(new HgStatus(Clean, fname, logHelper));
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294 }
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295 }
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296 public void ignored(Path fname) {
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297 if (needIgnored) {
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298 dispatch(new HgStatus(Ignored, fname, logHelper));
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299 }
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300 }
360
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301
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302 public void invalid(Path fname, Exception err) {
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303 try {
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304 handler.error(fname, new Outcome(Outcome.Kind.Failure, "Failed to get file status", err));
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305 } catch (HgCallbackTargetException ex) {
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306 failure = ex;
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307 }
360
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308 }
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309 }
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310 }