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annotate src/org/tmatesoft/hg/internal/CommitFacility.java @ 710:cf200271439a

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author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 07 Oct 2013 01:56:05 +0200
parents 4ffc17c0b534
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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.util.LogFacility.Severity.Error;
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23
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24 import java.io.File;
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25 import java.io.FileOutputStream;
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26 import java.io.FileWriter;
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27 import java.io.IOException;
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28 import java.nio.ByteBuffer;
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29 import java.util.ArrayList;
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30 import java.util.HashMap;
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31 import java.util.LinkedHashMap;
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32 import java.util.Map;
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33 import java.util.Set;
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34 import java.util.TreeMap;
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35 import java.util.TreeSet;
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36
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37 import org.tmatesoft.hg.core.HgCommitCommand;
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38 import org.tmatesoft.hg.core.HgIOException;
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39 import org.tmatesoft.hg.core.HgRepositoryLockException;
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40 import org.tmatesoft.hg.core.Nodeid;
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41 import org.tmatesoft.hg.internal.DataSerializer.ByteArraySerializer;
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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.ByteChannel;
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48 import org.tmatesoft.hg.util.CancelledException;
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49 import org.tmatesoft.hg.util.Pair;
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50 import org.tmatesoft.hg.util.Path;
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51
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52 /**
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53 * Name: CommitObject, FutureCommit or PendingCommit
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54 * The only public API now: {@link HgCommitCommand}.
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55 *
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56 * @author Artem Tikhomirov
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57 * @author TMate Software Ltd.
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58 */
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59 public final class CommitFacility {
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60 private final Internals repo;
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61 private final int p1Commit, p2Commit;
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62 private Map<Path, Pair<HgDataFile, DataSource>> files = new LinkedHashMap<Path, Pair<HgDataFile, DataSource>>();
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63 private Set<Path> removals = new TreeSet<Path>();
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64 private String branch, user;
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65
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66 public CommitFacility(Internals hgRepo, int parentCommit) {
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67 this(hgRepo, parentCommit, NO_REVISION);
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68 }
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69
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70 public CommitFacility(Internals hgRepo, int parent1Commit, int parent2Commit) {
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71 repo = hgRepo;
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72 p1Commit = parent1Commit;
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73 p2Commit = parent2Commit;
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74 if (parent1Commit != NO_REVISION && parent1Commit == parent2Commit) {
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75 throw new IllegalArgumentException("Merging same revision is dubious");
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76 }
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77 }
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78
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79 public boolean isMerge() {
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80 return p1Commit != NO_REVISION && p2Commit != NO_REVISION;
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81 }
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82
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83 public void add(HgDataFile dataFile, DataSource content) {
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84 if (content == null) {
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85 throw new IllegalArgumentException();
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86 }
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87 removals.remove(dataFile.getPath());
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88 files.put(dataFile.getPath(), new Pair<HgDataFile, DataSource>(dataFile, content));
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89 }
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90
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91 public void forget(HgDataFile dataFile) {
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92 files.remove(dataFile.getPath());
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93 removals.add(dataFile.getPath());
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94 }
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95
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96 public void branch(String branchName) {
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97 branch = branchName;
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98 }
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99
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100 public void user(String userName) {
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101 user = userName;
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102 }
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103
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104 // this method doesn't roll transaction back in case of failure, caller's responsibility
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105 // this method expects repository to be locked, if needed
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106 public Nodeid commit(String message, Transaction transaction) throws HgIOException, HgRepositoryLockException, HgRuntimeException {
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107 final HgChangelog clog = repo.getRepo().getChangelog();
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108 final int clogRevisionIndex = clog.getRevisionCount();
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109 ManifestRevision c1Manifest = new ManifestRevision(null, null);
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110 ManifestRevision c2Manifest = new ManifestRevision(null, null);
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111 final Nodeid p1Cset = p1Commit == NO_REVISION ? null : clog.getRevision(p1Commit);
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112 final Nodeid p2Cset = p2Commit == NO_REVISION ? null : clog.getRevision(p2Commit);
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113 if (p1Commit != NO_REVISION) {
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114 repo.getRepo().getManifest().walk(p1Commit, p1Commit, c1Manifest);
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115 }
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116 if (p2Commit != NO_REVISION) {
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117 repo.getRepo().getManifest().walk(p2Commit, p2Commit, c2Manifest);
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118 }
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119 // Pair<Integer, Integer> manifestParents = getManifestParents();
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120 Pair<Integer, Integer> manifestParents = new Pair<Integer, Integer>(c1Manifest.revisionIndex(), c2Manifest.revisionIndex());
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121 TreeMap<Path, Nodeid> newManifestRevision = new TreeMap<Path, Nodeid>();
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122 HashMap<Path, Pair<Integer, Integer>> fileParents = new HashMap<Path, Pair<Integer,Integer>>();
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123 for (Path f : c1Manifest.files()) {
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124 HgDataFile df = repo.getRepo().getFileNode(f);
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125 Nodeid fileKnownRev1 = c1Manifest.nodeid(f), fileKnownRev2;
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126 final int fileRevIndex1 = df.getRevisionIndex(fileKnownRev1);
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127 final int fileRevIndex2;
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128 if ((fileKnownRev2 = c2Manifest.nodeid(f)) != null) {
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129 // merged files
559
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130 fileRevIndex2 = df.getRevisionIndex(fileKnownRev2);
539
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131 } else {
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132 fileRevIndex2 = NO_REVISION;
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133 }
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134
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135 fileParents.put(f, new Pair<Integer, Integer>(fileRevIndex1, fileRevIndex2));
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136 newManifestRevision.put(f, fileKnownRev1);
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137 }
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138 //
559
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139 // Forget removed
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140 for (Path p : removals) {
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141 newManifestRevision.remove(p);
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142 }
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143 //
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144 saveCommitMessage(message);
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145 //
559
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146 // Register new/changed
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147 FNCacheFile.Mediator fncache = new FNCacheFile.Mediator(repo, transaction);
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148 ArrayList<Path> touchInDirstate = new ArrayList<Path>();
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149 for (Pair<HgDataFile, DataSource> e : files.values()) {
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150 HgDataFile df = e.first();
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151 DataSource bds = e.second();
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152 Pair<Integer, Integer> fp = fileParents.get(df.getPath());
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153 if (fp == null) {
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154 // NEW FILE, either just added or resurrected from p2
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155 Nodeid fileRevInP2;
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156 if ((fileRevInP2 = c2Manifest.nodeid(df.getPath())) != null) {
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157 fp = new Pair<Integer, Integer>(df.getRevisionIndex(fileRevInP2), NO_REVISION);
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158 } else {
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159 // brand new
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160 fp = new Pair<Integer, Integer>(NO_REVISION, NO_REVISION);
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161 }
538
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162 }
708
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163 // TODO if fp.first() != NO_REVISION and fp.second() != NO_REVISION check if one
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164 // revision is ancestor of another and use the latest as p1, then
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165 Nodeid fileRev = null;
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166 final boolean isNewFile = !df.exists();
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167 if (fp.first() != NO_REVISION && fp.second() == NO_REVISION && !isNewFile) {
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168 // compare file contents to see if anything has changed, and reuse old revision, if unchanged.
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169 // XXX ineffective, need better access to revision conten
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170 ByteArraySerializer bas = new ByteArraySerializer();
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171 bds.serialize(bas);
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172 final byte[] newContent = bas.toByteArray();
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173 // unless there's a way to reset DataSource, replace it with the content just read
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174 bds = new DataSerializer.ByteArrayDataSource(newContent);
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175 if (new ComparatorChannel(newContent).same(df, fp.first())) {
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176 fileRev = df.getRevision(fp.first());
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177 }
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178 }
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179 if (fileRev == null) {
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180 RevlogStream contentStream = repo.getImplAccess().getStream(df);
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181 RevlogStreamWriter fileWriter = new RevlogStreamWriter(repo, contentStream, transaction);
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182 fileRev = fileWriter.addRevision(bds, clogRevisionIndex, fp.first(), fp.second()).second();
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183 if (isNewFile) {
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184 // registerNew shall go after fileWriter.addRevision as it needs to know if data is inlined or not
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185 fncache.registerNew(df.getPath(), contentStream);
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186 }
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187 }
538
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188 newManifestRevision.put(df.getPath(), fileRev);
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189 touchInDirstate.add(df.getPath());
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190 }
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191 //
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192 final EncodingHelper encHelper = repo.buildFileNameEncodingHelper();
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diff changeset
193 //
538
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194 // Manifest
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195 final ManifestEntryBuilder manifestBuilder = new ManifestEntryBuilder(encHelper);
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196 for (Map.Entry<Path, Nodeid> me : newManifestRevision.entrySet()) {
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197 manifestBuilder.add(me.getKey().toString(), me.getValue());
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198 }
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199 RevlogStreamWriter manifestWriter = new RevlogStreamWriter(repo, repo.getImplAccess().getManifestStream(), transaction);
660
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200 Nodeid manifestRev = manifestWriter.addRevision(manifestBuilder, clogRevisionIndex, manifestParents.first(), manifestParents.second()).second();
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201 //
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202 // Changelog
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203 final ChangelogEntryBuilder changelogBuilder = new ChangelogEntryBuilder(encHelper);
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204 changelogBuilder.setModified(files.keySet());
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dca70c0b1f74 Test tags, branches and hgingore information get refreshed on external (and/or internal) change
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205 changelogBuilder.branch(branch == null ? DEFAULT_BRANCH_NAME : branch);
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206 changelogBuilder.user(String.valueOf(user));
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207 changelogBuilder.manifest(manifestRev).comment(message);
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208 RevlogStreamWriter changelogWriter = new RevlogStreamWriter(repo, repo.getImplAccess().getChangelogStream(), transaction);
660
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209 Nodeid changesetRev = changelogWriter.addRevision(changelogBuilder, clogRevisionIndex, p1Commit, p2Commit).second();
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210 // TODO move dirstate and bookmark update update to an external facility
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211 fncache.complete();
612
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212 String oldBranchValue = DirstateReader.readBranch(repo);
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213 String newBranchValue = branch == null ? DEFAULT_BRANCH_NAME : branch;
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214 if (!oldBranchValue.equals(newBranchValue)) {
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215 // prepare undo.branch as described in http://mercurial.selenic.com/wiki/FileFormats#undo..2A
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216 File branchFile = transaction.prepare(repo.getRepositoryFile(Branch), repo.getRepositoryFile(UndoBranch));
612
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217 FileOutputStream fos = null;
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218 try {
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219 fos = new FileOutputStream(branchFile);
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220 fos.write(newBranchValue.getBytes(EncodingHelper.getUTF8().name())); // XXX Java 1.5
612
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221 fos.flush();
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222 fos.close();
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223 fos = null;
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224 transaction.done(branchFile);
612
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225 } catch (IOException ex) {
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226 transaction.failure(branchFile, ex);
612
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227 repo.getLog().dump(getClass(), Error, ex, "Failed to write branch information, error ignored");
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228 } finally {
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diff changeset
229 try {
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230 if (fos != null) {
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231 fos.close();
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232 }
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233 } catch (IOException ex) {
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234 repo.getLog().dump(getClass(), Error, ex, null);
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235 }
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236 }
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237 }
617
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238 // bring dirstate up to commit state, TODO share this code with HgAddRemoveCommand
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239 final DirstateBuilder dirstateBuilder = new DirstateBuilder(repo);
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240 dirstateBuilder.fillFrom(new DirstateReader(repo, repo.getSessionContext().getPathFactory()));
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241 for (Path p : removals) {
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242 dirstateBuilder.recordRemoved(p);
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243 }
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244 for (Path p : touchInDirstate) {
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245 dirstateBuilder.recordUncertain(p);
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246 }
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247 dirstateBuilder.parents(changesetRev, Nodeid.NULL);
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248 dirstateBuilder.serialize(transaction);
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249 // update bookmarks
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250 if (p1Commit != NO_REVISION || p2Commit != NO_REVISION) {
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251 repo.getRepo().getBookmarks().updateActive(p1Cset, p2Cset, changesetRev);
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252 }
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253 PhasesHelper phaseHelper = new PhasesHelper(repo);
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254 HgPhase newCommitPhase = HgPhase.parse(repo.getRepo().getConfiguration().getStringValue("phases", "new-commit", HgPhase.Draft.mercurialString()));
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255 phaseHelper.newCommitNode(changesetRev, newCommitPhase);
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256 // TODO Revisit: might be reasonable to send out a "Repo changed" notification, to clear
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257 // e.g. cached branch, tags and so on, not to rely on file change detection methods?
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258 // The same notification might come useful once Pull is implemented
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259 return changesetRev;
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260 }
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261
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262 private void saveCommitMessage(String message) throws HgIOException {
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263 File lastMessage = repo.getRepositoryFile(LastMessage);
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264 // do not attempt to write if we are going to fail anyway
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265 if ((lastMessage.isFile() && !lastMessage.canWrite()) || !lastMessage.getParentFile().canWrite()) {
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266 return;
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267 }
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268 FileWriter w = null;
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269 try {
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270 w = new FileWriter(lastMessage);
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271 w.write(message == null ? new String() : message);
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272 w.flush();
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273 } catch (IOException ex) {
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274 throw new HgIOException("Failed to save last commit message", ex, lastMessage);
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275 } finally {
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276 new FileUtils(repo.getLog(), this).closeQuietly(w, lastMessage);
636
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277 }
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278 }
708
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279
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280 private static class ComparatorChannel implements ByteChannel {
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281 private int index;
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282 private final byte[] content;
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283
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284 public ComparatorChannel(byte[] contentToCompare) {
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285 content = contentToCompare;
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286 }
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287
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288 public int write(ByteBuffer buffer) throws IOException, CancelledException {
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289 int consumed = 0;
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290 while (buffer.hasRemaining()) {
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291 byte b = buffer.get();
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292 consumed++;
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293 if (content[index++] != b) {
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294 throw new CancelledException();
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295 }
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296 }
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297 return consumed;
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298 }
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299
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300 public boolean same(HgDataFile df, int fileRevIndex) {
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301 index = 0;
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302 try {
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303 df.contentWithFilters(fileRevIndex, this);
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304 return index == content.length;
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305 } catch (CancelledException ex) {
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306 // comparison failed, content differs, ok to go on
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307 }
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308 return false;
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309 }
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310 }
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311
538
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312 /*
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313 private Pair<Integer, Integer> getManifestParents() {
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314 return new Pair<Integer, Integer>(extractManifestRevisionIndex(p1Commit), extractManifestRevisionIndex(p2Commit));
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315 }
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316
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317 private int extractManifestRevisionIndex(int clogRevIndex) {
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318 if (clogRevIndex == NO_REVISION) {
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319 return NO_REVISION;
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320 }
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321 RawChangeset commitObject = repo.getChangelog().range(clogRevIndex, clogRevIndex).get(0);
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322 Nodeid manifestRev = commitObject.manifest();
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323 if (manifestRev.isNull()) {
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324 return NO_REVISION;
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325 }
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326 return repo.getManifest().getRevisionIndex(manifestRev);
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327 }
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328 */
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329 }