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annotate src/org/tmatesoft/hg/core/HgCommitCommand.java @ 628:6526d8adbc0f

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Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 22 May 2013 15:52:31 +0200
parents 5afc7eedb3dd
children b4242b7e7dfe
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 static org.tmatesoft.hg.repo.HgRepository.NO_REVISION;
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20
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21 import java.io.IOException;
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22
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23 import org.tmatesoft.hg.internal.COWTransaction;
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24 import org.tmatesoft.hg.internal.CommitFacility;
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25 import org.tmatesoft.hg.internal.CompleteRepoLock;
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26 import org.tmatesoft.hg.internal.FileContentSupplier;
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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.internal.WorkingCopyContent;
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30 import org.tmatesoft.hg.repo.HgChangelog;
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31 import org.tmatesoft.hg.repo.HgDataFile;
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32 import org.tmatesoft.hg.repo.HgInternals;
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33 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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34 import org.tmatesoft.hg.repo.HgRepository;
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35 import org.tmatesoft.hg.repo.HgRuntimeException;
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36 import org.tmatesoft.hg.repo.HgStatusCollector.Record;
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37 import org.tmatesoft.hg.repo.HgWorkingCopyStatusCollector;
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38 import org.tmatesoft.hg.util.CancelledException;
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39 import org.tmatesoft.hg.util.Outcome;
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40 import org.tmatesoft.hg.util.Outcome.Kind;
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41 import org.tmatesoft.hg.util.Pair;
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42 import org.tmatesoft.hg.util.Path;
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43
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44 /**
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45 * 'hg commit' counterpart, commit changes
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46 *
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47 * @since 1.1
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48 * @author Artem Tikhomirov
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49 * @author TMate Software Ltd.
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50 */
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51 public class HgCommitCommand extends HgAbstractCommand<HgCommitCommand> {
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52
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53 private final HgRepository repo;
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54 private String message;
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55 private String user;
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56 // nodeid of newly added revision
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57 private Nodeid newRevision;
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58
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59 public HgCommitCommand(HgRepository hgRepo) {
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60 repo = hgRepo;
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61 }
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62
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63
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64 public HgCommitCommand message(String msg) {
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65 message = msg;
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66 return this;
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67 }
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68
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69 public HgCommitCommand user(String userName) {
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70 user = userName;
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71 return this;
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72 }
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73
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74 /**
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75 * Tell if changes in the working directory constitute merge commit. May be invoked prior to (and independently from) {@link #execute()}
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76 *
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77 * @return <code>true</code> if working directory changes are result of a merge
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78 * @throws HgLibraryFailureException to indicate unexpected issue with the repository
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79 * @throws HgException subclass thereof to indicate other specific issue with repository state
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80 */
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81 public boolean isMergeCommit() throws HgException {
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82 try {
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83 int[] parents = new int[2];
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84 detectParentFromDirstate(parents);
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85 return parents[0] != NO_REVISION && parents[1] != NO_REVISION;
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86 } catch (HgRuntimeException ex) {
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87 throw new HgLibraryFailureException(ex);
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88 }
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89 }
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90
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91 /**
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92 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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93 * @throws HgRepositoryLockException if failed to lock the repo for modifications
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94 * @throws IOException propagated IO errors from status walker over working directory
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95 * @throws CancelledException if execution of the command was cancelled
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96 */
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97 public Outcome execute() throws HgException, IOException, CancelledException {
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98 if (message == null) {
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99 throw new HgBadArgumentException("Shall supply commit message", null);
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100 }
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101 final CompleteRepoLock repoLock = new CompleteRepoLock(repo);
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102 repoLock.acquire();
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103 try {
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104 int[] parentRevs = new int[2];
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105 detectParentFromDirstate(parentRevs);
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106 if (parentRevs[0] != NO_REVISION && parentRevs[1] != NO_REVISION) {
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107 throw new HgBadArgumentException("Sorry, I'm not yet smart enough to perform merge commits", null);
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108 }
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109 HgWorkingCopyStatusCollector sc = new HgWorkingCopyStatusCollector(repo);
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110 Record status = sc.status(HgRepository.WORKING_COPY);
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111 if (status.getModified().size() == 0 && status.getAdded().size() == 0 && status.getRemoved().size() == 0) {
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112 newRevision = Nodeid.NULL;
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113 return new Outcome(Kind.Failure, "nothing to add");
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114 }
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115 CommitFacility cf = new CommitFacility(Internals.getInstance(repo), parentRevs[0], parentRevs[1]);
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116 for (Path m : status.getModified()) {
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117 HgDataFile df = repo.getFileNode(m);
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118 cf.add(df, new WorkingCopyContent(df));
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119 }
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120 for (Path a : status.getAdded()) {
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121 HgDataFile df = repo.getFileNode(a); // TODO need smth explicit, like repo.createNewFileNode(Path) here
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122 // XXX might be an interesting exercise not to demand a content supplier, but instead return a "DataRequester"
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123 // object, that would indicate interest in data, and this code would "push" it to requester, so that any exception
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124 // is handled here, right away, and won't need to travel supplier and CommitFacility. (although try/catch inside
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125 // supplier.read (with empty throws declaration)
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126 cf.add(df, new FileContentSupplier(repo, a));
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127 }
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128 for (Path r : status.getRemoved()) {
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129 HgDataFile df = repo.getFileNode(r);
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130 cf.forget(df);
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131 }
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132 cf.branch(detectBranch());
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133 cf.user(detectUser());
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134 Transaction.Factory trFactory = new COWTransaction.Factory();
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135 Transaction tr = trFactory.create(repo);
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136 try {
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137 newRevision = cf.commit(message, tr);
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138 tr.commit();
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139 } catch (RuntimeException ex) {
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140 tr.rollback();
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141 throw ex;
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142 } catch (HgException ex) {
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143 tr.rollback();
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144 throw ex;
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145 }
586
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146 return new Outcome(Kind.Success, "Commit ok");
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147 } catch (HgRuntimeException ex) {
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148 throw new HgLibraryFailureException(ex);
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149 } finally {
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150 repoLock.release();
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151 }
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152 }
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153
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154 public Nodeid getCommittedRevision() {
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155 if (newRevision == null) {
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156 throw new IllegalStateException("Call #execute() first!");
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157 }
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158 return newRevision;
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159 }
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160
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161 private String detectBranch() throws HgInvalidControlFileException {
586
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162 return repo.getWorkingCopyBranchName();
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163 }
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164
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165 private String detectUser() {
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166 if (user != null) {
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167 return user;
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168 }
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169 // TODO HgInternals is odd place for getNextCommitUsername()
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170 return new HgInternals(repo).getNextCommitUsername();
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171 }
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172
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173 private void detectParentFromDirstate(int[] parents) throws HgRuntimeException {
586
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174 Pair<Nodeid, Nodeid> pn = repo.getWorkingCopyParents();
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175 HgChangelog clog = repo.getChangelog();
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176 parents[0] = pn.first().isNull() ? NO_REVISION : clog.getRevisionIndex(pn.first());
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177 parents[1] = pn.second().isNull() ? NO_REVISION : clog.getRevisionIndex(pn.second());
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178 }
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179 }