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annotate cmdline/org/tmatesoft/hg/console/Clone.java @ 176:a8df7162ec75

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Extracting complete branch using remote between call to detect incoming changes is done. Arguments reorderd in remote repo to better match Hg server ideology, not my mental convenience
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 02 Apr 2011 03:01:14 +0200
parents 2c3e96674e2a
children 44a34baabea0
rev   line source
170
71ddbf8603e8 Initial clone: populate given directory from a bundle. Everything but remote server access is there, albeit prototype code style
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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.console;
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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 import static org.tmatesoft.hg.internal.RequiresFile.DOTENCODE;
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22 import static org.tmatesoft.hg.internal.RequiresFile.FNCACHE;
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23
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24 import java.io.ByteArrayOutputStream;
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25 import java.io.File;
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26 import java.io.FileOutputStream;
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27 import java.io.IOException;
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28 import java.net.URL;
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29 import java.nio.ByteBuffer;
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30 import java.util.ArrayList;
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31 import java.util.Collections;
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32 import java.util.LinkedList;
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33 import java.util.List;
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34 import java.util.TreeMap;
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35 import java.util.zip.DeflaterOutputStream;
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36
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37 import org.tmatesoft.hg.core.HgBadStateException;
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38 import org.tmatesoft.hg.core.HgRepoFacade;
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39 import org.tmatesoft.hg.core.Nodeid;
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40 import org.tmatesoft.hg.internal.ByteArrayDataAccess;
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41 import org.tmatesoft.hg.internal.DataAccess;
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42 import org.tmatesoft.hg.internal.DigestHelper;
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43 import org.tmatesoft.hg.internal.Internals;
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44 import org.tmatesoft.hg.internal.RequiresFile;
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45 import org.tmatesoft.hg.internal.RevlogStream;
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46 import org.tmatesoft.hg.repo.HgBundle;
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47 import org.tmatesoft.hg.repo.HgLookup;
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48 import org.tmatesoft.hg.repo.HgRemoteRepository;
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49 import org.tmatesoft.hg.repo.HgBundle.GroupElement;
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50 import org.tmatesoft.hg.repo.HgRepository;
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51 import org.tmatesoft.hg.util.PathRewrite;
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52
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53 /**
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54 * WORK IN PROGRESS, DO NOT USE
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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 class Clone {
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60 /*
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61 * Changegroup:
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62 * http://mercurial.selenic.com/wiki/Merge
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63 * http://mercurial.selenic.com/wiki/WireProtocol
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64 *
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65 * according to latter, bundleformat data is sent through zlib
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66 * (there's no header like HG10?? with the server output, though,
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67 * as one may expect according to http://mercurial.selenic.com/wiki/BundleFormat)
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68 */
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69 public static void main(String[] args) throws Exception {
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70 Options cmdLineOpts = Options.parse(args);
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71 HgRepoFacade hgRepo = new HgRepoFacade();
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72 if (!hgRepo.init(cmdLineOpts.findRepository())) {
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73 System.err.printf("Can't find repository in: %s\n", hgRepo.getRepository().getLocation());
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74 return;
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75 }
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76 File destDir = new File("/temp/hg/clone-01/");
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77 if (destDir.exists()) {
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78 if (!destDir.isDirectory()) {
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79 throw new IllegalArgumentException();
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80 } else if (destDir.list().length > 0) {
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81 throw new IllegalArgumentException();
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82 }
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83 } else {
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84 destDir.mkdirs();
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85 }
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86 // if cloning remote repo, which can stream and no revision is specified -
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87 // can use 'stream_out' wireproto
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88 //
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89 // //////// 1. from Remote.java take code that asks changegroup from remote server and write it down to temp file
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90 // //////// 2. then, read the file with HgBundle
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91 // //////// 3. process changelog, memorize nodeids to index
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92 // //////// 4. process manifest, using map from step 3, collect manifest nodeids
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93 // //////// 5. process every file, using map from 3, and consult set from step 4 to ensure repo is correct
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94 // access source
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2c3e96674e2a Towards outgoing changes - initial detection logic, get connected with remote repo stub
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95 HgRemoteRepository remoteRepo = new HgLookup().detect(new URL("https://asd/hg/"));
170
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96 // discover changes
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97 HgBundle completeChanges = remoteRepo.getChanges(Collections.singletonList(NULL));
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98 WriteDownMate mate = new WriteDownMate(destDir);
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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 // completeChanges.unlink();
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105 }
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106
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107 private static class WriteDownMate implements HgBundle.Inspector {
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108 private final File hgDir;
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109 private FileOutputStream indexFile;
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110 private final PathRewrite storagePathHelper;
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111
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112 private final TreeMap<Nodeid, Integer> changelogIndexes = new TreeMap<Nodeid, Integer>();
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113 private boolean collectChangelogIndexes = false;
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114
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115 private int base = -1;
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116 private long offset = 0;
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117 private DataAccess prevRevContent;
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118 private final DigestHelper dh = new DigestHelper();
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119 private final ArrayList<Nodeid> revisionSequence = new ArrayList<Nodeid>(); // last visited nodes first
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120
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121 private final LinkedList<String> fncacheFiles = new LinkedList<String>();
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122
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123 public WriteDownMate(File destDir) {
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124 hgDir = new File(destDir, ".hg");
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125 Internals i = new Internals();
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126 i.setStorageConfig(1, STORE | FNCACHE | DOTENCODE);
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127 storagePathHelper = i.buildDataFilesHelper();
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128 }
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129
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130 public void initEmptyRepository() throws IOException {
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131 hgDir.mkdir();
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132 FileOutputStream requiresFile = new FileOutputStream(new File(hgDir, "requires"));
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133 requiresFile.write("revlogv1\nstore\nfncache\ndotencode\n".getBytes());
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134 requiresFile.close();
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135 new File(hgDir, "store").mkdir(); // with that, hg verify says ok.
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136 }
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137
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138 public void complete() throws IOException {
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139 FileOutputStream fncacheFile = new FileOutputStream(new File(hgDir, "store/fncache"));
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140 for (String s : fncacheFiles) {
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141 fncacheFile.write(s.getBytes());
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142 fncacheFile.write(0x0A); // http://mercurial.selenic.com/wiki/fncacheRepoFormat
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143 }
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144 fncacheFile.close();
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145 }
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146
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147 public void changelogStart() {
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148 try {
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149 base = -1;
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150 offset = 0;
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151 revisionSequence.clear();
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152 indexFile = new FileOutputStream(new File(hgDir, "store/00changelog.i"));
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153 collectChangelogIndexes = true;
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154 } catch (IOException ex) {
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155 throw new HgBadStateException(ex);
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156 }
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157 }
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158
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159 public void changelogEnd() {
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160 try {
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161 if (prevRevContent != null) {
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162 prevRevContent.done();
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163 prevRevContent = null;
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164 }
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165 collectChangelogIndexes = false;
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166 indexFile.close();
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167 indexFile = null;
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168 } catch (IOException ex) {
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169 throw new HgBadStateException(ex);
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170 }
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171 }
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172
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173 public void manifestStart() {
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174 try {
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175 base = -1;
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176 offset = 0;
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177 revisionSequence.clear();
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178 indexFile = new FileOutputStream(new File(hgDir, "store/00manifest.i"));
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179 } catch (IOException ex) {
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180 throw new HgBadStateException(ex);
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181 }
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182 }
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183
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184 public void manifestEnd() {
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185 try {
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186 if (prevRevContent != null) {
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187 prevRevContent.done();
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188 prevRevContent = null;
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189 }
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190 indexFile.close();
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191 indexFile = null;
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192 } catch (IOException ex) {
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193 throw new HgBadStateException(ex);
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194 }
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195 }
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196
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197 public void fileStart(String name) {
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198 try {
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199 base = -1;
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200 offset = 0;
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201 revisionSequence.clear();
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202 fncacheFiles.add("data/" + name + ".i"); // FIXME this is pure guess,
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203 // need to investigate more how filenames are kept in fncache
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204 File file = new File(hgDir, storagePathHelper.rewrite(name));
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205 file.getParentFile().mkdirs();
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206 indexFile = new FileOutputStream(file);
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207 } catch (IOException ex) {
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208 throw new HgBadStateException(ex);
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209 }
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210 }
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211
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212 public void fileEnd(String name) {
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213 try {
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214 if (prevRevContent != null) {
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215 prevRevContent.done();
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216 prevRevContent = null;
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217 }
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218 indexFile.close();
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219 indexFile = null;
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220 } catch (IOException ex) {
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221 throw new HgBadStateException(ex);
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222 }
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223 }
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224
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225 private int knownRevision(Nodeid p) {
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226 if (NULL.equals(p)) {
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227 return -1;
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228 } else {
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229 for (int i = revisionSequence.size() - 1; i >= 0; i--) {
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230 if (revisionSequence.get(i).equals(p)) {
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231 return i;
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232 }
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233 }
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234 }
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235 throw new HgBadStateException(String.format("Can't find index of %s", p.shortNotation()));
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236 }
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237
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238 public boolean element(GroupElement ge) {
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239 try {
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240 assert indexFile != null;
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241 boolean writeComplete = false;
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242 Nodeid p1 = ge.firstParent();
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243 Nodeid p2 = ge.secondParent();
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244 if (NULL.equals(p1) && NULL.equals(p2) /* or forced flag, does REVIDX_PUNCHED_FLAG indicate that? */) {
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245 prevRevContent = new ByteArrayDataAccess(new byte[0]);
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246 writeComplete = true;
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247 }
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248 byte[] content = ge.apply(prevRevContent);
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249 byte[] calculated = dh.sha1(p1, p2, content).asBinary();
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250 final Nodeid node = ge.node();
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251 if (!node.equalsTo(calculated)) {
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252 throw new HgBadStateException("Checksum failed");
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253 }
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254 final int link;
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255 if (collectChangelogIndexes) {
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256 changelogIndexes.put(node, revisionSequence.size());
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257 link = revisionSequence.size();
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258 } else {
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259 Integer csRev = changelogIndexes.get(ge.cset());
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260 if (csRev == null) {
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261 throw new HgBadStateException(String.format("Changelog doesn't contain revision %s", ge.cset().shortNotation()));
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262 }
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263 link = csRev.intValue();
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264 }
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265 final int p1Rev = knownRevision(p1), p2Rev = knownRevision(p2);
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266 DataAccess patchContent = ge.rawData();
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267 writeComplete = writeComplete || patchContent.length() >= (/* 3/4 of actual */content.length - (content.length >>> 2));
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268 if (writeComplete) {
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269 base = revisionSequence.size();
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270 }
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271 final byte[] sourceData = writeComplete ? content : patchContent.byteArray();
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272 final byte[] data;
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273 ByteArrayOutputStream bos = new ByteArrayOutputStream(content.length);
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274 DeflaterOutputStream dos = new DeflaterOutputStream(bos);
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275 dos.write(sourceData);
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276 dos.close();
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277 final byte[] compressedData = bos.toByteArray();
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278 dos = null;
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279 bos = null;
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280 final Byte dataPrefix;
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281 if (compressedData.length >= (sourceData.length - (sourceData.length >>> 2))) {
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282 // compression wasn't too effective,
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283 data = sourceData;
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284 dataPrefix = 'u';
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285 } else {
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286 data = compressedData;
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287 dataPrefix = null;
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288 }
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289
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290 ByteBuffer header = ByteBuffer.allocate(64 /* REVLOGV1_RECORD_SIZE */);
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291 if (offset == 0) {
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292 final int INLINEDATA = 1 << 16;
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293 header.putInt(1 /* RevlogNG */ | INLINEDATA);
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294 header.putInt(0);
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295 } else {
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296 header.putLong(offset << 16);
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297 }
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298 final int compressedLen = data.length + (dataPrefix == null ? 0 : 1);
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299 header.putInt(compressedLen);
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300 header.putInt(content.length);
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301 header.putInt(base);
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302 header.putInt(link);
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303 header.putInt(p1Rev);
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304 header.putInt(p2Rev);
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305 header.put(node.toByteArray());
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306 // assume 12 bytes left are zeros
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307 indexFile.write(header.array());
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308 if (dataPrefix != null) {
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309 indexFile.write(dataPrefix.byteValue());
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310 }
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311 indexFile.write(data);
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312 //
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313 offset += compressedLen;
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314 revisionSequence.add(node);
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315 prevRevContent.done();
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316 prevRevContent = new ByteArrayDataAccess(content);
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317 } catch (IOException ex) {
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318 throw new HgBadStateException(ex);
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319 }
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320 return true;
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321 }
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322 }
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323 }