annotate src/org/tmatesoft/hg/core/HgRevertCommand.java @ 709:497e697636fc

Report merged lines as changed block if possible, not as a sequence of added/deleted blocks. To facilitate access to merge parent lines AddBlock got mergeLineAt() method that reports index of the line in the second parent (if any), while insertedAt() has been changed to report index in the first parent always
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 21 Aug 2013 16:23:27 +0200
parents b4242b7e7dfe
children
rev   line source
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1 /*
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2 * Copyright (c) 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.io.File;
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20 import java.util.Arrays;
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21 import java.util.LinkedHashSet;
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22 import java.util.Set;
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23
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24 import org.tmatesoft.hg.internal.CsetParamKeeper;
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25 import org.tmatesoft.hg.internal.DirstateBuilder;
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26 import org.tmatesoft.hg.internal.DirstateReader;
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27 import org.tmatesoft.hg.internal.Internals;
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28 import org.tmatesoft.hg.internal.Transaction;
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29 import org.tmatesoft.hg.repo.HgManifest;
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30 import org.tmatesoft.hg.repo.HgManifest.Flags;
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31 import org.tmatesoft.hg.repo.HgRepository;
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32 import org.tmatesoft.hg.repo.HgRepositoryLock;
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33 import org.tmatesoft.hg.repo.HgRuntimeException;
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34 import org.tmatesoft.hg.util.CancelSupport;
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35 import org.tmatesoft.hg.util.CancelledException;
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36 import org.tmatesoft.hg.util.Path;
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37 import org.tmatesoft.hg.util.ProgressSupport;
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38
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39 /**
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40 * Restore files to their checkout state, 'hg revert' counterpart.
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41 *
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42 * @since 1.1
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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 HgRevertCommand extends HgAbstractCommand<HgRevertCommand> {
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47
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48 private final HgRepository repo;
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49 private final Set<Path> files = new LinkedHashSet<Path>();
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50 private CsetParamKeeper changesetToCheckout;
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51 private boolean keepOriginal = true;
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52
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53 public HgRevertCommand(HgRepository hgRepo) {
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54 repo = hgRepo;
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55 changesetToCheckout = new CsetParamKeeper(hgRepo);
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56 changesetToCheckout.doSet(HgRepository.WORKING_COPY); // XXX WORKING_COPY_PARENT, in fact
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57 }
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58
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59 /**
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60 * Additive
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61 *
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62 * @param paths files to revert
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63 * @return <code>this</code> for convenience
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64 */
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65 public HgRevertCommand file(Path... paths) {
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66 files.addAll(Arrays.asList(paths));
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67 return this;
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68 }
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69
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70 /**
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71 * Revert the given files to their states as of a specific revision
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72 *
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73 * @param changesetRevIndex
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74 * @return <code>this</code> for convenience
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75 * @throws HgBadArgumentException
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76 */
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77 public HgRevertCommand changeset(int changesetRevIndex) throws HgBadArgumentException {
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78 changesetToCheckout.set(changesetRevIndex);
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79 return this;
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80 }
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81
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82 /**
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83 * Handy supplement to {@link #changeset(int)}
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84 *
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85 * @param revision
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86 * @return <code>this</code> for convenience
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87 * @throws HgBadArgumentException
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88 */
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89 public HgRevertCommand changeset(Nodeid revision) throws HgBadArgumentException {
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90 changesetToCheckout.set(revision);
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91 return this;
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92 }
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93
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94 // TODO keepOriginal() to save .orig (with tests!)
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95
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96 /**
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97 * Perform the back out for the given files
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98 *
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99 * @throws HgIOException to indicate troubles updating files in working copy
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100 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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101 * @throws CancelledException if execution of the command was cancelled
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102 */
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103 public void execute() throws HgException, CancelledException {
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104 final HgRepositoryLock wdLock = repo.getWorkingDirLock();
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105 wdLock.acquire();
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106 try {
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107 final ProgressSupport progress = getProgressSupport(null);
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108 final CancelSupport cancellation = getCancelSupport(null, true);
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109 cancellation.checkCancelled();
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110 progress.start(files.size() + 2);
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111 final int csetRevision;
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112 if (changesetToCheckout.get() == HgRepository.WORKING_COPY) {
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113 csetRevision = repo.getChangelog().getRevisionIndex(repo.getWorkingCopyParents().first());
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114 } else {
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115 csetRevision = changesetToCheckout.get();
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116 }
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117 Internals implRepo = Internals.getInstance(repo);
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118 final DirstateBuilder dirstateBuilder = new DirstateBuilder(implRepo);
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119 dirstateBuilder.fillFrom(new DirstateReader(implRepo, new Path.SimpleSource()));
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120 progress.worked(1);
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121 cancellation.checkCancelled();
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122
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123 final HgCheckoutCommand.CheckoutWorker worker = new HgCheckoutCommand.CheckoutWorker(implRepo);
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124
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125 HgManifest.Inspector insp = new HgManifest.Inspector() {
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126
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127 public boolean next(Nodeid nid, Path fname, Flags flags) {
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128 if (worker.next(nid, fname, flags)) {
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129 dirstateBuilder.recordUncertain(fname);
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130 return true;
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131 }
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132 return false;
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133 }
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134
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135 public boolean end(int manifestRevision) {
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136 return false;
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137 }
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138
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139 public boolean begin(int mainfestRevision, Nodeid nid, int changelogRevision) {
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140 return true;
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141 }
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142 };
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143
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144 for (Path file : files) {
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145 File f = new File(repo.getWorkingDir(), file.toString());
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146 if (f.isFile()) {
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147 if (keepOriginal) {
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148 File copy = new File(f.getParentFile(), f.getName() + ".orig");
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149 if (copy.exists()) {
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150 copy.delete();
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151 }
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152 f.renameTo(copy);
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153 } else {
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154 f.delete();
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155 }
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156 }
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157 repo.getManifest().walkFileRevisions(file, insp, csetRevision);
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158 worker.checkFailed();
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159 progress.worked(1);
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160 cancellation.checkCancelled();
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161 }
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162 Transaction.Factory trFactory = implRepo.getTransactionFactory();
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163 Transaction tr = trFactory.create(repo);
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164 try {
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165 // TODO same code in HgAddRemoveCommand and similar in HgCommitCommand
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166 dirstateBuilder.serialize(tr);
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167 tr.commit();
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168 } catch (RuntimeException ex) {
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169 tr.rollback();
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170 throw ex;
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171 } catch (HgException ex) {
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172 tr.rollback();
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173 throw ex;
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174 }
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175 progress.worked(1);
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176 progress.done();
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177 } catch (HgRuntimeException ex) {
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178 throw new HgLibraryFailureException(ex);
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179 } finally {
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180 wdLock.release();
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181 }
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182 }
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183 }