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annotate src/org/tmatesoft/hg/internal/CommitFacility.java @ 616:5e0313485eef

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author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 14 May 2013 17:31:35 +0200
parents f41dd9a3b8af
children 65c01508f002
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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.Branch;
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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.IOException;
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27 import java.nio.ByteBuffer;
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28 import java.util.ArrayList;
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29 import java.util.HashMap;
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30 import java.util.LinkedHashMap;
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31 import java.util.Map;
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32 import java.util.Set;
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33 import java.util.TreeMap;
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34 import java.util.TreeSet;
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35
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36 import org.tmatesoft.hg.core.HgCommitCommand;
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37 import org.tmatesoft.hg.core.HgIOException;
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38 import org.tmatesoft.hg.core.HgRepositoryLockException;
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39 import org.tmatesoft.hg.core.Nodeid;
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40 import org.tmatesoft.hg.repo.HgChangelog;
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41 import org.tmatesoft.hg.repo.HgDataFile;
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42 import org.tmatesoft.hg.util.Pair;
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43 import org.tmatesoft.hg.util.Path;
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44
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45 /**
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46 * Name: CommitObject, FutureCommit or PendingCommit
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47 * The only public API now: {@link HgCommitCommand}.
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48 *
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49 * @author Artem Tikhomirov
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50 * @author TMate Software Ltd.
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51 */
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52 public final class CommitFacility {
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53 private final Internals repo;
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54 private final int p1Commit, p2Commit;
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55 private Map<Path, Pair<HgDataFile, ByteDataSupplier>> files = new LinkedHashMap<Path, Pair<HgDataFile, ByteDataSupplier>>();
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56 private Set<Path> removals = new TreeSet<Path>();
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57 private String branch, user;
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58
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59 public CommitFacility(Internals hgRepo, int parentCommit) {
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60 this(hgRepo, parentCommit, NO_REVISION);
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61 }
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62
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63 public CommitFacility(Internals hgRepo, int parent1Commit, int parent2Commit) {
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64 repo = hgRepo;
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65 p1Commit = parent1Commit;
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66 p2Commit = parent2Commit;
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67 if (parent1Commit != NO_REVISION && parent1Commit == parent2Commit) {
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68 throw new IllegalArgumentException("Merging same revision is dubious");
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69 }
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70 }
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71
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72 public boolean isMerge() {
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73 return p1Commit != NO_REVISION && p2Commit != NO_REVISION;
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74 }
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75
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76 public void add(HgDataFile dataFile, ByteDataSupplier content) {
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77 if (content == null) {
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78 throw new IllegalArgumentException();
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79 }
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80 removals.remove(dataFile.getPath());
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81 files.put(dataFile.getPath(), new Pair<HgDataFile, ByteDataSupplier>(dataFile, content));
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82 }
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83
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84 public void forget(HgDataFile dataFile) {
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85 files.remove(dataFile.getPath());
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86 removals.add(dataFile.getPath());
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87 }
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88
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89 public void branch(String branchName) {
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90 branch = branchName;
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91 }
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92
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93 public void user(String userName) {
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94 user = userName;
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95 }
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96
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97 public Nodeid commit(String message) throws HgIOException, HgRepositoryLockException {
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98 final HgChangelog clog = repo.getRepo().getChangelog();
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99 final int clogRevisionIndex = clog.getRevisionCount();
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100 ManifestRevision c1Manifest = new ManifestRevision(null, null);
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101 ManifestRevision c2Manifest = new ManifestRevision(null, null);
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102 final Nodeid p1Cset = p1Commit == NO_REVISION ? null : clog.getRevision(p1Commit);
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103 final Nodeid p2Cset = p2Commit == NO_REVISION ? null : clog.getRevision(p2Commit);
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104 if (p1Commit != NO_REVISION) {
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105 repo.getRepo().getManifest().walk(p1Commit, p1Commit, c1Manifest);
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106 }
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107 if (p2Commit != NO_REVISION) {
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108 repo.getRepo().getManifest().walk(p2Commit, p2Commit, c2Manifest);
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109 }
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110 // Pair<Integer, Integer> manifestParents = getManifestParents();
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111 Pair<Integer, Integer> manifestParents = new Pair<Integer, Integer>(c1Manifest.revisionIndex(), c2Manifest.revisionIndex());
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112 TreeMap<Path, Nodeid> newManifestRevision = new TreeMap<Path, Nodeid>();
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113 HashMap<Path, Pair<Integer, Integer>> fileParents = new HashMap<Path, Pair<Integer,Integer>>();
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114 for (Path f : c1Manifest.files()) {
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115 HgDataFile df = repo.getRepo().getFileNode(f);
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116 Nodeid fileKnownRev1 = c1Manifest.nodeid(f), fileKnownRev2;
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117 final int fileRevIndex1 = df.getRevisionIndex(fileKnownRev1);
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118 final int fileRevIndex2;
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119 if ((fileKnownRev2 = c2Manifest.nodeid(f)) != null) {
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120 // merged files
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121 fileRevIndex2 = df.getRevisionIndex(fileKnownRev2);
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122 } else {
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123 fileRevIndex2 = NO_REVISION;
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124 }
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125
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126 fileParents.put(f, new Pair<Integer, Integer>(fileRevIndex1, fileRevIndex2));
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127 newManifestRevision.put(f, fileKnownRev1);
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128 }
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129 //
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130 // Forget removed
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131 for (Path p : removals) {
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132 newManifestRevision.remove(p);
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133 }
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134 //
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135 // Register new/changed
616
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136 LinkedHashMap<Path, RevlogStream> newlyAddedFiles = new LinkedHashMap<Path, RevlogStream>();
588
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137 ArrayList<Path> touchInDirstate = new ArrayList<Path>();
538
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138 for (Pair<HgDataFile, ByteDataSupplier> e : files.values()) {
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139 HgDataFile df = e.first();
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140 Pair<Integer, Integer> fp = fileParents.get(df.getPath());
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141 if (fp == null) {
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142 // NEW FILE
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143 fp = new Pair<Integer, Integer>(NO_REVISION, NO_REVISION);
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144 }
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145 ByteDataSupplier bds = e.second();
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146 // FIXME quickfix, instead, pass ByteDataSupplier directly to RevlogStreamWriter
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147 ByteBuffer bb = ByteBuffer.allocate(2048);
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148 ByteArrayChannel bac = new ByteArrayChannel();
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149 while (bds.read(bb) != -1) {
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150 bb.flip();
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151 bac.write(bb);
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152 bb.clear();
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153 }
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154 RevlogStream contentStream;
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155 if (df.exists()) {
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156 contentStream = repo.getImplAccess().getStream(df);
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157 } else {
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158 contentStream = repo.createStoreFile(df.getPath());
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159 newlyAddedFiles.put(df.getPath(), contentStream);
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160 // FIXME df doesn't get df.content updated, and clients
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161 // that would attempt to access newly added file after commit would fail
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162 // (despite the fact the file is in there)
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163 }
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164 RevlogStreamWriter fileWriter = new RevlogStreamWriter(repo, contentStream);
538
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165 Nodeid fileRev = fileWriter.addRevision(bac.toArray(), clogRevisionIndex, fp.first(), fp.second());
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166 newManifestRevision.put(df.getPath(), fileRev);
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167 touchInDirstate.add(df.getPath());
538
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168 }
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169 //
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170 // Manifest
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171 final ManifestEntryBuilder manifestBuilder = new ManifestEntryBuilder();
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172 for (Map.Entry<Path, Nodeid> me : newManifestRevision.entrySet()) {
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173 manifestBuilder.add(me.getKey().toString(), me.getValue());
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174 }
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175 RevlogStreamWriter manifestWriter = new RevlogStreamWriter(repo, repo.getImplAccess().getManifestStream());
538
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176 Nodeid manifestRev = manifestWriter.addRevision(manifestBuilder.build(), clogRevisionIndex, manifestParents.first(), manifestParents.second());
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177 //
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178 // Changelog
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179 final ChangelogEntryBuilder changelogBuilder = new ChangelogEntryBuilder();
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180 changelogBuilder.setModified(files.keySet());
612
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181 changelogBuilder.branch(branch == null ? DEFAULT_BRANCH_NAME : branch);
586
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182 changelogBuilder.user(String.valueOf(user));
538
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183 byte[] clogContent = changelogBuilder.build(manifestRev, message);
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184 RevlogStreamWriter changelogWriter = new RevlogStreamWriter(repo, repo.getImplAccess().getChangelogStream());
538
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185 Nodeid changesetRev = changelogWriter.addRevision(clogContent, clogRevisionIndex, p1Commit, p2Commit);
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186 // TODO move fncache update to an external facility, along with dirstate and bookmark update
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187 if (!newlyAddedFiles.isEmpty() && repo.fncacheInUse()) {
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188 FNCacheFile fncache = new FNCacheFile(repo);
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189 for (Path p : newlyAddedFiles.keySet()) {
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190 fncache.addIndex(p);
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191 if (!newlyAddedFiles.get(p).isInlineData()) {
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192 fncache.addData(p);
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193 }
539
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194 }
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195 try {
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196 fncache.write();
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197 } catch (IOException ex) {
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198 // see comment above for fnchache.read()
612
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199 repo.getLog().dump(getClass(), Error, ex, "Failed to write fncache, error ignored");
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200 }
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201 }
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202 String oldBranchValue = DirstateReader.readBranch(repo);
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203 String newBranchValue = branch == null ? DEFAULT_BRANCH_NAME : branch;
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204 if (!oldBranchValue.equals(newBranchValue)) {
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205 File branchFile = repo.getRepositoryFile(Branch);
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206 FileOutputStream fos = null;
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207 try {
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208 fos = new FileOutputStream(branchFile);
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209 fos.write(newBranchValue.getBytes(EncodingHelper.getUTF8()));
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210 fos.flush();
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diff changeset
211 } catch (IOException ex) {
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212 repo.getLog().dump(getClass(), Error, ex, "Failed to write branch information, error ignored");
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213 } finally {
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214 try {
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215 if (fos != null) {
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216 fos.close();
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217 }
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218 } catch (IOException ex) {
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219 repo.getLog().dump(getClass(), Error, ex, null);
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220 }
539
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221 }
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222 }
588
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diff changeset
223 // bring dirstate up to commit state
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224 final DirstateBuilder dirstateBuilder = new DirstateBuilder(repo);
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225 dirstateBuilder.fillFrom(new DirstateReader(repo, new Path.SimpleSource()));
588
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diff changeset
226 for (Path p : removals) {
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diff changeset
227 dirstateBuilder.recordRemoved(p);
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228 }
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229 for (Path p : touchInDirstate) {
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230 dirstateBuilder.recordUncertain(p);
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diff changeset
231 }
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232 dirstateBuilder.parents(changesetRev, Nodeid.NULL);
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233 dirstateBuilder.serialize();
605
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234 // update bookmarks
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diff changeset
235 if (p1Commit != NO_REVISION || p2Commit != NO_REVISION) {
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236 repo.getRepo().getBookmarks().updateActive(p1Cset, p2Cset, changesetRev);
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237 }
616
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diff changeset
238 // TODO undo.dirstate and undo.branch as described in http://mercurial.selenic.com/wiki/FileFormats#undo..2A
610
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239 // TODO Revisit: might be reasonable to send out a "Repo changed" notification, to clear
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240 // e.g. cached branch, tags and so on, not to rely on file change detection methods?
616
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241 // The same notification might come useful once Pull is implemented
538
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242 return changesetRev;
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243 }
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244 /*
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245 private Pair<Integer, Integer> getManifestParents() {
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246 return new Pair<Integer, Integer>(extractManifestRevisionIndex(p1Commit), extractManifestRevisionIndex(p2Commit));
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247 }
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248
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249 private int extractManifestRevisionIndex(int clogRevIndex) {
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250 if (clogRevIndex == NO_REVISION) {
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251 return NO_REVISION;
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252 }
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253 RawChangeset commitObject = repo.getChangelog().range(clogRevIndex, clogRevIndex).get(0);
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254 Nodeid manifestRev = commitObject.manifest();
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255 if (manifestRev.isNull()) {
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256 return NO_REVISION;
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257 }
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258 return repo.getManifest().getRevisionIndex(manifestRev);
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259 }
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260 */
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261
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262 // unlike DataAccess (which provides structured access), this one
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263 // deals with a sequence of bytes, when there's no need in structure of the data
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264 // FIXME java.nio.ReadableByteChannel or ByteStream/ByteSequence(read, length, reset)
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265 // SHALL be inline with util.ByteChannel, reading bytes from HgDataFile, preferably DataAccess#readBytes(BB) to match API,
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266 // and a wrap for ByteVector
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267 public interface ByteDataSupplier { // TODO look if can resolve DataAccess in HgCloneCommand visibility issue
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268 // FIXME needs lifecycle, e.g. for supplier that reads from WC
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269 int read(ByteBuffer buf);
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270 }
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271
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272 public interface ByteDataConsumer {
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273 void write(ByteBuffer buf);
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274 }
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275 }