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annotate src/org/tmatesoft/hg/internal/CommitFacility.java @ 664:ae2d439fbed3

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Utilize transaction when writing fncache. Better HgIOException
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 10 Jul 2013 19:33:51 +0200
parents 4fd317a2fecf
children fba85bc1dfb8
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.internal;
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18
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19 import static org.tmatesoft.hg.repo.HgRepository.DEFAULT_BRANCH_NAME;
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20 import static org.tmatesoft.hg.repo.HgRepository.NO_REVISION;
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21 import static org.tmatesoft.hg.repo.HgRepositoryFiles.*;
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22 import static org.tmatesoft.hg.repo.HgRepositoryFiles.Branch;
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23 import static org.tmatesoft.hg.repo.HgRepositoryFiles.UndoBranch;
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24 import static org.tmatesoft.hg.util.LogFacility.Severity.Error;
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26 import java.io.File;
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27 import java.io.FileOutputStream;
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28 import java.io.FileWriter;
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29 import java.io.IOException;
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30 import java.util.ArrayList;
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31 import java.util.HashMap;
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32 import java.util.LinkedHashMap;
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33 import java.util.Map;
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34 import java.util.Set;
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35 import java.util.TreeMap;
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36 import java.util.TreeSet;
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37
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38 import org.tmatesoft.hg.core.HgCommitCommand;
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39 import org.tmatesoft.hg.core.HgIOException;
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40 import org.tmatesoft.hg.core.HgRepositoryLockException;
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41 import org.tmatesoft.hg.core.Nodeid;
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42 import org.tmatesoft.hg.internal.DataSerializer.DataSource;
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43 import org.tmatesoft.hg.repo.HgChangelog;
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44 import org.tmatesoft.hg.repo.HgDataFile;
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45 import org.tmatesoft.hg.repo.HgPhase;
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46 import org.tmatesoft.hg.repo.HgRuntimeException;
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47 import org.tmatesoft.hg.util.Pair;
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48 import org.tmatesoft.hg.util.Path;
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49
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50 /**
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51 * Name: CommitObject, FutureCommit or PendingCommit
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52 * The only public API now: {@link HgCommitCommand}.
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53 *
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54 * @author Artem Tikhomirov
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55 * @author TMate Software Ltd.
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56 */
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57 public final class CommitFacility {
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58 private final Internals repo;
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59 private final int p1Commit, p2Commit;
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60 private Map<Path, Pair<HgDataFile, DataSource>> files = new LinkedHashMap<Path, Pair<HgDataFile, DataSource>>();
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61 private Set<Path> removals = new TreeSet<Path>();
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62 private String branch, user;
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63
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64 public CommitFacility(Internals hgRepo, int parentCommit) {
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65 this(hgRepo, parentCommit, NO_REVISION);
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66 }
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67
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68 public CommitFacility(Internals hgRepo, int parent1Commit, int parent2Commit) {
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69 repo = hgRepo;
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70 p1Commit = parent1Commit;
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71 p2Commit = parent2Commit;
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72 if (parent1Commit != NO_REVISION && parent1Commit == parent2Commit) {
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73 throw new IllegalArgumentException("Merging same revision is dubious");
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74 }
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75 }
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76
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77 public boolean isMerge() {
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78 return p1Commit != NO_REVISION && p2Commit != NO_REVISION;
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79 }
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80
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81 public void add(HgDataFile dataFile, DataSource content) {
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82 if (content == null) {
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83 throw new IllegalArgumentException();
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84 }
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85 removals.remove(dataFile.getPath());
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86 files.put(dataFile.getPath(), new Pair<HgDataFile, DataSource>(dataFile, content));
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87 }
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88
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89 public void forget(HgDataFile dataFile) {
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90 files.remove(dataFile.getPath());
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91 removals.add(dataFile.getPath());
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92 }
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93
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94 public void branch(String branchName) {
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95 branch = branchName;
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96 }
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97
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98 public void user(String userName) {
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99 user = userName;
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100 }
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101
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102 // this method doesn't roll transaction back in case of failure, caller's responsibility
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103 // this method expects repository to be locked, if needed
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104 public Nodeid commit(String message, Transaction transaction) throws HgIOException, HgRepositoryLockException, HgRuntimeException {
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105 final HgChangelog clog = repo.getRepo().getChangelog();
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106 final int clogRevisionIndex = clog.getRevisionCount();
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107 ManifestRevision c1Manifest = new ManifestRevision(null, null);
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108 ManifestRevision c2Manifest = new ManifestRevision(null, null);
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109 final Nodeid p1Cset = p1Commit == NO_REVISION ? null : clog.getRevision(p1Commit);
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110 final Nodeid p2Cset = p2Commit == NO_REVISION ? null : clog.getRevision(p2Commit);
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111 if (p1Commit != NO_REVISION) {
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112 repo.getRepo().getManifest().walk(p1Commit, p1Commit, c1Manifest);
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113 }
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114 if (p2Commit != NO_REVISION) {
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115 repo.getRepo().getManifest().walk(p2Commit, p2Commit, c2Manifest);
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116 }
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117 // Pair<Integer, Integer> manifestParents = getManifestParents();
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118 Pair<Integer, Integer> manifestParents = new Pair<Integer, Integer>(c1Manifest.revisionIndex(), c2Manifest.revisionIndex());
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119 TreeMap<Path, Nodeid> newManifestRevision = new TreeMap<Path, Nodeid>();
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120 HashMap<Path, Pair<Integer, Integer>> fileParents = new HashMap<Path, Pair<Integer,Integer>>();
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121 for (Path f : c1Manifest.files()) {
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122 HgDataFile df = repo.getRepo().getFileNode(f);
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123 Nodeid fileKnownRev1 = c1Manifest.nodeid(f), fileKnownRev2;
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124 final int fileRevIndex1 = df.getRevisionIndex(fileKnownRev1);
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125 final int fileRevIndex2;
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126 if ((fileKnownRev2 = c2Manifest.nodeid(f)) != null) {
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127 // merged files
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128 fileRevIndex2 = df.getRevisionIndex(fileKnownRev2);
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129 } else {
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130 fileRevIndex2 = NO_REVISION;
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131 }
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132
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133 fileParents.put(f, new Pair<Integer, Integer>(fileRevIndex1, fileRevIndex2));
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134 newManifestRevision.put(f, fileKnownRev1);
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135 }
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136 //
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137 // Forget removed
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138 for (Path p : removals) {
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139 newManifestRevision.remove(p);
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140 }
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141 //
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142 saveCommitMessage(message);
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143 //
559
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144 // Register new/changed
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145 FNCacheFile.Mediator fncache = new FNCacheFile.Mediator(repo, transaction);
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146 ArrayList<Path> touchInDirstate = new ArrayList<Path>();
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147 for (Pair<HgDataFile, DataSource> e : files.values()) {
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148 HgDataFile df = e.first();
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149 DataSource bds = e.second();
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150 Pair<Integer, Integer> fp = fileParents.get(df.getPath());
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151 if (fp == null) {
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152 // NEW FILE
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153 fp = new Pair<Integer, Integer>(NO_REVISION, NO_REVISION);
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154 }
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155 RevlogStream contentStream = repo.getImplAccess().getStream(df);
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156 final boolean isNewFile = !df.exists();
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157 RevlogStreamWriter fileWriter = new RevlogStreamWriter(repo, contentStream, transaction);
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158 Nodeid fileRev = fileWriter.addRevision(bds, clogRevisionIndex, fp.first(), fp.second()).second();
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159 newManifestRevision.put(df.getPath(), fileRev);
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160 touchInDirstate.add(df.getPath());
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161 if (isNewFile) {
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162 // registerNew shall go after fileWriter.addRevision as it needs to know if data is inlined or not
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163 fncache.registerNew(df.getPath(), contentStream);
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164 }
538
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165 }
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166 //
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167 // Manifest
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168 final ManifestEntryBuilder manifestBuilder = new ManifestEntryBuilder(repo.buildFileNameEncodingHelper());
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169 for (Map.Entry<Path, Nodeid> me : newManifestRevision.entrySet()) {
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170 manifestBuilder.add(me.getKey().toString(), me.getValue());
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171 }
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172 RevlogStreamWriter manifestWriter = new RevlogStreamWriter(repo, repo.getImplAccess().getManifestStream(), transaction);
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173 Nodeid manifestRev = manifestWriter.addRevision(manifestBuilder, clogRevisionIndex, manifestParents.first(), manifestParents.second()).second();
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174 //
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175 // Changelog
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176 final ChangelogEntryBuilder changelogBuilder = new ChangelogEntryBuilder();
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177 changelogBuilder.setModified(files.keySet());
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178 changelogBuilder.branch(branch == null ? DEFAULT_BRANCH_NAME : branch);
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179 changelogBuilder.user(String.valueOf(user));
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180 changelogBuilder.manifest(manifestRev).comment(message);
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181 RevlogStreamWriter changelogWriter = new RevlogStreamWriter(repo, repo.getImplAccess().getChangelogStream(), transaction);
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182 Nodeid changesetRev = changelogWriter.addRevision(changelogBuilder, clogRevisionIndex, p1Commit, p2Commit).second();
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183 // TODO move dirstate and bookmark update update to an external facility
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184 fncache.complete();
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185 String oldBranchValue = DirstateReader.readBranch(repo);
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186 String newBranchValue = branch == null ? DEFAULT_BRANCH_NAME : branch;
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187 if (!oldBranchValue.equals(newBranchValue)) {
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188 // prepare undo.branch as described in http://mercurial.selenic.com/wiki/FileFormats#undo..2A
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189 File branchFile = transaction.prepare(repo.getRepositoryFile(Branch), repo.getRepositoryFile(UndoBranch));
612
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190 FileOutputStream fos = null;
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191 try {
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192 fos = new FileOutputStream(branchFile);
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193 fos.write(newBranchValue.getBytes(EncodingHelper.getUTF8().name())); // XXX Java 1.5
612
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194 fos.flush();
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195 fos.close();
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196 fos = null;
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197 transaction.done(branchFile);
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198 } catch (IOException ex) {
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199 transaction.failure(branchFile, ex);
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200 repo.getLog().dump(getClass(), Error, ex, "Failed to write branch information, error ignored");
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201 } finally {
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202 try {
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203 if (fos != null) {
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204 fos.close();
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205 }
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206 } catch (IOException ex) {
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207 repo.getLog().dump(getClass(), Error, ex, null);
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208 }
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209 }
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210 }
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211 // bring dirstate up to commit state, TODO share this code with HgAddRemoveCommand
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212 final DirstateBuilder dirstateBuilder = new DirstateBuilder(repo);
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213 dirstateBuilder.fillFrom(new DirstateReader(repo, new Path.SimpleSource()));
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214 for (Path p : removals) {
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215 dirstateBuilder.recordRemoved(p);
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216 }
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217 for (Path p : touchInDirstate) {
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218 dirstateBuilder.recordUncertain(p);
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219 }
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220 dirstateBuilder.parents(changesetRev, Nodeid.NULL);
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221 dirstateBuilder.serialize(transaction);
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222 // update bookmarks
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223 if (p1Commit != NO_REVISION || p2Commit != NO_REVISION) {
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224 repo.getRepo().getBookmarks().updateActive(p1Cset, p2Cset, changesetRev);
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225 }
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226 PhasesHelper phaseHelper = new PhasesHelper(repo);
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227 HgPhase newCommitPhase = HgPhase.parse(repo.getRepo().getConfiguration().getStringValue("phases", "new-commit", HgPhase.Draft.mercurialString()));
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228 phaseHelper.newCommitNode(changesetRev, newCommitPhase);
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229 // TODO Revisit: might be reasonable to send out a "Repo changed" notification, to clear
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230 // e.g. cached branch, tags and so on, not to rely on file change detection methods?
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231 // The same notification might come useful once Pull is implemented
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232 return changesetRev;
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233 }
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234
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235 private void saveCommitMessage(String message) throws HgIOException {
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236 File lastMessage = repo.getRepositoryFile(LastMessage);
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237 // do not attempt to write if we are going to fail anyway
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238 if ((lastMessage.isFile() && !lastMessage.canWrite()) || !lastMessage.getParentFile().canWrite()) {
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239 return;
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240 }
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241 FileWriter w = null;
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242 try {
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243 w = new FileWriter(lastMessage);
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244 w.write(message == null ? new String() : message);
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245 w.flush();
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246 } catch (IOException ex) {
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247 throw new HgIOException("Failed to save last commit message", ex, lastMessage);
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248 } finally {
654
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249 new FileUtils(repo.getLog(), this).closeQuietly(w, lastMessage);
636
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250 }
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251 }
538
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252 /*
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253 private Pair<Integer, Integer> getManifestParents() {
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254 return new Pair<Integer, Integer>(extractManifestRevisionIndex(p1Commit), extractManifestRevisionIndex(p2Commit));
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255 }
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256
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257 private int extractManifestRevisionIndex(int clogRevIndex) {
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258 if (clogRevIndex == NO_REVISION) {
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259 return NO_REVISION;
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260 }
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261 RawChangeset commitObject = repo.getChangelog().range(clogRevIndex, clogRevIndex).get(0);
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262 Nodeid manifestRev = commitObject.manifest();
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263 if (manifestRev.isNull()) {
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264 return NO_REVISION;
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265 }
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266 return repo.getManifest().getRevisionIndex(manifestRev);
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267 }
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268 */
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269 }