Mercurial > jhg

annotate src/org/tmatesoft/hg/core/HgCloneCommand.java @ 450:03fd8d079e9c smartgit3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Share PhasesHelper instance among few HgChangesets (mostly affects HgChangesetTreeHandler case)
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 07 Jun 2012 17:06:23 +0200
parents 6952d9ce97f1
children 528b6780a8bd
rev   line source
186
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1 /*
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2 * Copyright (c) 2011 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.core.Nodeid.NULL;
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20 import static org.tmatesoft.hg.internal.RequiresFile.*;
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21
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22 import java.io.ByteArrayOutputStream;
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23 import java.io.File;
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24 import java.io.FileOutputStream;
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25 import java.io.IOException;
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26 import java.nio.ByteBuffer;
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27 import java.util.ArrayList;
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28 import java.util.Collections;
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29 import java.util.LinkedList;
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30 import java.util.TreeMap;
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31 import java.util.zip.DeflaterOutputStream;
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32
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33 import org.tmatesoft.hg.internal.BasicSessionContext;
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34 import org.tmatesoft.hg.internal.ByteArrayDataAccess;
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35 import org.tmatesoft.hg.internal.DataAccess;
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36 import org.tmatesoft.hg.internal.DigestHelper;
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37 import org.tmatesoft.hg.internal.Internals;
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38 import org.tmatesoft.hg.repo.HgBundle;
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39 import org.tmatesoft.hg.repo.HgBundle.GroupElement;
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40 import org.tmatesoft.hg.repo.HgLookup;
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41 import org.tmatesoft.hg.repo.HgRemoteRepository;
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42 import org.tmatesoft.hg.repo.HgRepository;
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43 import org.tmatesoft.hg.util.CancelledException;
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44 import org.tmatesoft.hg.util.PathRewrite;
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45
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46 /**
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47 * WORK IN PROGRESS, DO NOT USE
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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 class HgCloneCommand {
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53
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54 private File destination;
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55 private HgRemoteRepository srcRepo;
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56
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57 public HgCloneCommand() {
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58 }
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59
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60 /**
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61 * @param folder location to become root of the repository (i.e. where <em>.hg</em> folder would reside). Either
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62 * shall not exist or be empty otherwise.
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63 * @return <code>this</code> for convenience
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64 */
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65 public HgCloneCommand destination(File folder) {
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66 destination = folder;
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67 return this;
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68 }
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69
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70 public HgCloneCommand source(HgRemoteRepository hgRemote) {
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71 srcRepo = hgRemote;
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72 return this;
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73 }
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74
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75 public HgRepository execute() throws HgBadArgumentException, HgRemoteConnectionException, HgInvalidFileException, CancelledException {
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76 if (destination == null) {
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77 throw new IllegalArgumentException("Destination not set", null);
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78 }
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79 if (srcRepo == null || srcRepo.isInvalid()) {
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80 throw new HgBadArgumentException("Bad source repository", null);
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81 }
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82 if (destination.exists()) {
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83 if (!destination.isDirectory()) {
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84 throw new HgBadArgumentException(String.format("%s is not a directory", destination), null);
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85 } else if (destination.list().length > 0) {
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86 throw new HgBadArgumentException(String.format("% shall be empty", destination), null);
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87 }
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88 } else {
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89 destination.mkdirs();
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90 }
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91 // if cloning remote repo, which can stream and no revision is specified -
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92 // can use 'stream_out' wireproto
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93 //
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94 // pull all changes from the very beginning
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95 // XXX consult getContext() if by any chance has a bundle ready, if not, then read and register
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96 HgBundle completeChanges = srcRepo.getChanges(Collections.singletonList(NULL));
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97 WriteDownMate mate = new WriteDownMate(destination);
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98 try {
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99 // instantiate new repo in the destdir
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100 mate.initEmptyRepository();
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101 // pull changes
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102 completeChanges.inspectAll(mate);
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103 mate.complete();
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104 } catch (IOException ex) {
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105 throw new HgInvalidFileException(getClass().getName(), ex);
186
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106 } finally {
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107 completeChanges.unlink();
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108 }
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109 return new HgLookup().detect(destination);
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110 }
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111
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112
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113 // 1. process changelog, memorize nodeids to index
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114 // 2. process manifest, using map from step 3, collect manifest nodeids
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115 // 3. process every file, using map from 3, and consult set from step 4 to ensure repo is correct
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116 private static class WriteDownMate implements HgBundle.Inspector {
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117 private final File hgDir;
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118 private final PathRewrite storagePathHelper;
186
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119 private FileOutputStream indexFile;
190
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120 private String filename; // human-readable name of the file being written, for log/exception purposes
186
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121
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122 private final TreeMap<Nodeid, Integer> changelogIndexes = new TreeMap<Nodeid, Integer>();
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123 private boolean collectChangelogIndexes = false;
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124
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125 private int base = -1;
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126 private long offset = 0;
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127 private DataAccess prevRevContent;
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128 private final DigestHelper dh = new DigestHelper();
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129 private final ArrayList<Nodeid> revisionSequence = new ArrayList<Nodeid>(); // last visited nodes first
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130
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131 private final LinkedList<String> fncacheFiles = new LinkedList<String>();
202
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132 private Internals implHelper;
186
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133
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134 public WriteDownMate(File destDir) {
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135 hgDir = new File(destDir, ".hg");
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136 implHelper = new Internals(new BasicSessionContext(null, null));
202
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137 implHelper.setStorageConfig(1, STORE | FNCACHE | DOTENCODE);
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138 storagePathHelper = implHelper.buildDataFilesHelper();
186
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139 }
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140
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141 public void initEmptyRepository() throws IOException {
202
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142 implHelper.initEmptyRepository(hgDir);
186
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143 }
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144
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145 public void complete() throws IOException {
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146 FileOutputStream fncacheFile = new FileOutputStream(new File(hgDir, "store/fncache"));
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147 for (String s : fncacheFiles) {
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148 fncacheFile.write(s.getBytes());
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149 fncacheFile.write(0x0A); // http://mercurial.selenic.com/wiki/fncacheRepoFormat
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150 }
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151 fncacheFile.close();
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152 }
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153
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154 public void changelogStart() {
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155 try {
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156 base = -1;
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157 offset = 0;
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158 revisionSequence.clear();
190
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159 indexFile = new FileOutputStream(new File(hgDir, filename = "store/00changelog.i"));
186
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160 collectChangelogIndexes = true;
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161 } catch (IOException ex) {
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162 throw new HgBadStateException(ex);
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163 }
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164 }
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165
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166 public void changelogEnd() {
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167 try {
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168 if (prevRevContent != null) {
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169 prevRevContent.done();
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170 prevRevContent = null;
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171 }
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172 collectChangelogIndexes = false;
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173 indexFile.close();
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174 indexFile = null;
190
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175 filename = null;
186
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176 } catch (IOException ex) {
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177 throw new HgBadStateException(ex);
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178 }
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179 }
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180
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181 public void manifestStart() {
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182 try {
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183 base = -1;
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184 offset = 0;
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185 revisionSequence.clear();
190
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186 indexFile = new FileOutputStream(new File(hgDir, filename = "store/00manifest.i"));
186
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187 } catch (IOException ex) {
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188 throw new HgBadStateException(ex);
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189 }
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190 }
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191
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192 public void manifestEnd() {
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193 try {
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194 if (prevRevContent != null) {
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195 prevRevContent.done();
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196 prevRevContent = null;
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197 }
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198 indexFile.close();
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199 indexFile = null;
190
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200 filename = null;
186
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201 } catch (IOException ex) {
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202 throw new HgBadStateException(ex);
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203 }
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204 }
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205
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206 public void fileStart(String name) {
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207 try {
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208 base = -1;
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209 offset = 0;
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210 revisionSequence.clear();
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211 fncacheFiles.add("data/" + name + ".i"); // FIXME this is pure guess,
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212 // need to investigate more how filenames are kept in fncache
292
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213 File file = new File(hgDir, filename = storagePathHelper.rewrite(name).toString());
186
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214 file.getParentFile().mkdirs();
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215 indexFile = new FileOutputStream(file);
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216 } catch (IOException ex) {
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217 throw new HgBadStateException(ex);
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218 }
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219 }
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220
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221 public void fileEnd(String name) {
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222 try {
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223 if (prevRevContent != null) {
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224 prevRevContent.done();
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225 prevRevContent = null;
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226 }
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227 indexFile.close();
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228 indexFile = null;
190
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229 filename = null;
186
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230 } catch (IOException ex) {
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231 throw new HgBadStateException(ex);
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232 }
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233 }
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234
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235 private int knownRevision(Nodeid p) {
274
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236 if (p.isNull()) {
186
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237 return -1;
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238 } else {
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239 for (int i = revisionSequence.size() - 1; i >= 0; i--) {
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240 if (revisionSequence.get(i).equals(p)) {
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241 return i;
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242 }
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243 }
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244 }
190
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245 throw new HgBadStateException(String.format("Can't find index of %s for file %s", p.shortNotation(), filename));
186
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246 }
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247
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248 public boolean element(GroupElement ge) {
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249 try {
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250 assert indexFile != null;
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251 boolean writeComplete = false;
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252 Nodeid p1 = ge.firstParent();
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253 Nodeid p2 = ge.secondParent();
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254 if (p1.isNull() && p2.isNull() /* or forced flag, does REVIDX_PUNCHED_FLAG indicate that? */) {
186
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255 prevRevContent = new ByteArrayDataAccess(new byte[0]);
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256 writeComplete = true;
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257 }
358
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258 byte[] content = ge.apply(prevRevContent.byteArray());
186
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259 byte[] calculated = dh.sha1(p1, p2, content).asBinary();
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260 final Nodeid node = ge.node();
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261 if (!node.equalsTo(calculated)) {
190
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diff changeset
262 throw new HgBadStateException(String.format("Checksum failed: expected %s, calculated %s. File %s", node, calculated, filename));
186
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263 }
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264 final int link;
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265 if (collectChangelogIndexes) {
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266 changelogIndexes.put(node, revisionSequence.size());
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267 link = revisionSequence.size();
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268 } else {
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269 Integer csRev = changelogIndexes.get(ge.cset());
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270 if (csRev == null) {
190
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diff changeset
271 throw new HgBadStateException(String.format("Changelog doesn't contain revision %s of %s", ge.cset().shortNotation(), filename));
186
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272 }
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273 link = csRev.intValue();
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274 }
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275 final int p1Rev = knownRevision(p1), p2Rev = knownRevision(p2);
358
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diff changeset
276 byte[] patchContent = ge.rawDataByteArray();
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diff changeset
277 writeComplete = writeComplete || patchContent.length >= (/* 3/4 of actual */content.length - (content.length >>> 2));
186
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278 if (writeComplete) {
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279 base = revisionSequence.size();
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280 }
358
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diff changeset
281 final byte[] sourceData = writeComplete ? content : patchContent;
186
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282 final byte[] data;
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283 ByteArrayOutputStream bos = new ByteArrayOutputStream(content.length);
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284 DeflaterOutputStream dos = new DeflaterOutputStream(bos);
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285 dos.write(sourceData);
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286 dos.close();
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287 final byte[] compressedData = bos.toByteArray();
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288 dos = null;
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289 bos = null;
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290 final Byte dataPrefix;
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291 if (compressedData.length >= (sourceData.length - (sourceData.length >>> 2))) {
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292 // compression wasn't too effective,
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293 data = sourceData;
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294 dataPrefix = 'u';
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295 } else {
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296 data = compressedData;
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297 dataPrefix = null;
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298 }
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299
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300 ByteBuffer header = ByteBuffer.allocate(64 /* REVLOGV1_RECORD_SIZE */);
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301 if (offset == 0) {
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302 final int INLINEDATA = 1 << 16;
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303 header.putInt(1 /* RevlogNG */ | INLINEDATA);
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304 header.putInt(0);
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305 } else {
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306 header.putLong(offset << 16);
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307 }
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308 final int compressedLen = data.length + (dataPrefix == null ? 0 : 1);
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309 header.putInt(compressedLen);
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diff changeset
310 header.putInt(content.length);
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311 header.putInt(base);
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312 header.putInt(link);
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313 header.putInt(p1Rev);
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314 header.putInt(p2Rev);
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315 header.put(node.toByteArray());
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316 // assume 12 bytes left are zeros
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diff changeset
317 indexFile.write(header.array());
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diff changeset
318 if (dataPrefix != null) {
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319 indexFile.write(dataPrefix.byteValue());
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320 }
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321 indexFile.write(data);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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322 //
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323 offset += compressedLen;
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324 revisionSequence.add(node);
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325 prevRevContent.done();
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326 prevRevContent = new ByteArrayDataAccess(content);
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327 } catch (IOException ex) {
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328 throw new HgBadStateException(ex);
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329 }
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330 return true;
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331 }
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332 }
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333
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334 }