Mercurial > jhg
annotate src/org/tmatesoft/hg/core/HgCheckoutCommand.java @ 643:a8ce405da1f5
v1.2 line of dev: update versions, use patch merge code by default
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Wed, 19 Jun 2013 16:03:11 +0200 |
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1 /* |
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2 * Copyright (c) 2012-2013 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.core; |
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18 |
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19 import static org.tmatesoft.hg.repo.HgRepositoryFiles.Branch; |
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20 import static org.tmatesoft.hg.repo.HgRepositoryFiles.Dirstate; |
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21 |
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22 import java.io.File; |
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23 import java.io.FileOutputStream; |
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24 import java.io.IOException; |
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25 import java.io.OutputStreamWriter; |
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26 import java.nio.channels.FileChannel; |
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27 |
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28 import org.tmatesoft.hg.internal.CsetParamKeeper; |
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29 import org.tmatesoft.hg.internal.DirstateBuilder; |
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30 import org.tmatesoft.hg.internal.EncodingHelper; |
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31 import org.tmatesoft.hg.internal.Internals; |
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32 import org.tmatesoft.hg.internal.WorkingDirFileWriter; |
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33 import org.tmatesoft.hg.repo.HgDataFile; |
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34 import org.tmatesoft.hg.repo.HgDirstate; |
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35 import org.tmatesoft.hg.repo.HgDirstate.EntryKind; |
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36 import org.tmatesoft.hg.repo.HgDirstate.Record; |
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37 import org.tmatesoft.hg.repo.HgInternals; |
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38 import org.tmatesoft.hg.repo.HgManifest; |
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39 import org.tmatesoft.hg.repo.HgManifest.Flags; |
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40 import org.tmatesoft.hg.repo.HgRepository; |
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41 import org.tmatesoft.hg.repo.HgRuntimeException; |
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42 import org.tmatesoft.hg.util.CancelSupport; |
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43 import org.tmatesoft.hg.util.CancelledException; |
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44 import org.tmatesoft.hg.util.Path; |
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45 import org.tmatesoft.hg.util.ProgressSupport; |
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46 |
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47 /** |
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48 * Update working directory to specific state, 'hg checkout' counterpart. |
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49 * For the time being, only 'clean' checkout is supported ('hg co --clean') |
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50 * |
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51 * @since 1.1 |
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52 * @author Artem Tikhomirov |
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53 * @author TMate Software Ltd. |
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54 */ |
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55 public class HgCheckoutCommand extends HgAbstractCommand<HgCheckoutCommand>{ |
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56 |
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57 private final HgRepository repo; |
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58 private final CsetParamKeeper revisionToCheckout; |
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59 private boolean cleanCheckout; |
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60 |
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61 public HgCheckoutCommand(HgRepository hgRepo) { |
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62 repo = hgRepo; |
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63 revisionToCheckout = new CsetParamKeeper(repo); |
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64 } |
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65 |
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66 /** |
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67 * Whether to discard all uncommited changes prior to check-out. |
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68 * |
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69 * NOTE, at the moment, only clean checkout is supported! |
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70 * |
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71 * @param clean <code>true</code> to discard any change |
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72 * @return <code>this</code> for convenience |
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73 */ |
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74 public HgCheckoutCommand clean(boolean clean) { |
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75 cleanCheckout = clean; |
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76 return this; |
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77 } |
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78 |
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79 /** |
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80 * Select revision to check out |
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81 * |
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82 * @param nodeid revision |
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83 * @return <code>this</code> for convenience |
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84 * @throws HgBadArgumentException if failed to find supplied changeset |
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85 */ |
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86 public HgCheckoutCommand changeset(Nodeid nodeid) throws HgBadArgumentException { |
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87 revisionToCheckout.set(nodeid); |
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88 return this; |
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89 } |
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90 |
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91 /** |
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92 * Select revision to check out using local revision index |
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93 * |
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94 * @param changesetIndex local changelog revision index, or {@link HgRepository#TIP} |
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95 * @return <code>this</code> for convenience |
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96 * @throws HgBadArgumentException if failed to find supplied changeset |
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97 */ |
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98 public HgCheckoutCommand changeset(int changesetIndex) throws HgBadArgumentException { |
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99 revisionToCheckout.set(changesetIndex); |
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100 return this; |
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101 } |
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102 |
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103 /** |
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104 * Update working copy to match state of the selected revision. |
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105 * |
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106 * @throws HgIOException to indicate troubles updating files in working copy |
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107 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state |
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108 * @throws CancelledException if execution of the command was cancelled |
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109 */ |
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110 public void execute() throws HgException, CancelledException { |
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111 try { |
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112 final ProgressSupport progress = getProgressSupport(null); |
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113 final CancelSupport cancellation = getCancelSupport(null, true); |
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114 cancellation.checkCancelled(); |
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115 progress.start(6); |
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116 Internals internalRepo = Internals.getInstance(repo); |
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117 if (cleanCheckout) { |
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118 // remove tracked files from wd (perhaps, just forget 'Added'?) |
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119 // for now, just delete each and every tracked file |
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120 // TODO WorkingCopy container with getFile(HgDataFile/Path) to access files in WD |
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121 HgDirstate dirstate = new HgInternals(repo).getDirstate(); |
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122 dirstate.walk(new HgDirstate.Inspector() { |
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123 |
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124 public boolean next(EntryKind kind, Record entry) { |
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125 File f = new File(repo.getWorkingDir(), entry.name().toString()); |
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126 if (f.exists()) { |
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127 f.delete(); |
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128 } |
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129 return true; |
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130 } |
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131 }); |
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132 } else { |
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133 throw new HgBadArgumentException("Sorry, only clean checkout is supported now, use #clean(true)", null); |
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134 } |
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135 progress.worked(1); |
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136 cancellation.checkCancelled(); |
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137 final DirstateBuilder dirstateBuilder = new DirstateBuilder(internalRepo); |
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138 final CheckoutWorker worker = new CheckoutWorker(internalRepo); |
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139 HgManifest.Inspector insp = new HgManifest.Inspector() { |
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140 |
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141 public boolean next(Nodeid nid, Path fname, Flags flags) { |
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142 if (worker.next(nid, fname, flags)) { |
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143 // Mercurial seems to write "n 0 -1 unset fname" on `hg --clean co -rev <earlier rev>` |
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144 // and the reason for 'force lookup' I suspect is a slight chance of simultaneous modification |
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145 // of the file by user that doesn't alter its size the very second dirstate is being written |
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146 // (or the file is being updated and the update brought in changes that didn't alter the file size - |
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147 // with size and timestamp set, later `hg status` won't notice these changes) |
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148 |
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149 // However, as long as we use this class to write clean copies of the files, we can put all the fields |
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150 // right away. |
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151 int mtime = worker.getLastFileModificationTime(); |
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152 // Manifest flags are chars (despite octal values `hg manifest --debug` displays), |
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153 // while dirstate keeps actual unix flags. |
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154 int fmode = worker.getLastFileMode(); |
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155 dirstateBuilder.recordNormal(fname, fmode, mtime, worker.getLastFileSize()); |
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156 return true; |
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157 } |
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158 return false; |
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159 } |
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160 |
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161 public boolean end(int manifestRevision) { |
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162 return false; |
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163 } |
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164 |
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165 public boolean begin(int mainfestRevision, Nodeid nid, int changelogRevision) { |
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166 return true; |
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167 } |
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168 }; |
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169 // checkout tip if no revision set |
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170 final int coRevision = revisionToCheckout.get(HgRepository.TIP); |
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171 dirstateBuilder.parents(repo.getChangelog().getRevision(coRevision), null); |
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172 repo.getManifest().walk(coRevision, coRevision, insp); |
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173 worker.checkFailed(); |
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174 progress.worked(3); |
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175 cancellation.checkCancelled(); |
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176 File dirstateFile = internalRepo.getRepositoryFile(Dirstate); |
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177 try { |
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178 FileChannel dirstateFileChannel = new FileOutputStream(dirstateFile).getChannel(); |
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179 dirstateBuilder.serialize(dirstateFileChannel); |
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180 dirstateFileChannel.close(); |
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181 } catch (IOException ex) { |
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182 throw new HgIOException("Can't write down new directory state", ex, dirstateFile); |
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183 } |
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184 progress.worked(1); |
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185 cancellation.checkCancelled(); |
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186 String branchName = repo.getChangelog().range(coRevision, coRevision).get(0).branch(); |
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187 assert branchName != null; |
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188 File branchFile = internalRepo.getRepositoryFile(Branch); |
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189 if (HgRepository.DEFAULT_BRANCH_NAME.equals(branchName)) { |
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190 // clean actual branch, if any |
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191 if (branchFile.isFile()) { |
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192 branchFile.delete(); |
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193 } |
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194 } else { |
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195 try { |
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196 // branch file is UTF-8, see http://mercurial.selenic.com/wiki/EncodingStrategy#UTF-8_strings |
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197 OutputStreamWriter ow = new OutputStreamWriter(new FileOutputStream(branchFile), EncodingHelper.getUTF8()); |
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198 ow.write(branchName); |
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199 ow.close(); |
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200 } catch (IOException ex) { |
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201 throw new HgIOException("Can't write down branch information", ex, branchFile); |
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202 } |
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203 } |
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204 progress.worked(1); |
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205 progress.done(); |
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206 } catch (HgRuntimeException ex) { |
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207 throw new HgLibraryFailureException(ex); |
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208 } |
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209 } |
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210 |
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211 static class CheckoutWorker { |
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212 private final Internals hgRepo; |
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213 private HgException failure; |
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214 private int lastWrittenFileSize; |
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215 private int lastFileMode; |
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216 private int lastFileModificationTime; |
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217 |
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218 CheckoutWorker(Internals implRepo) { |
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219 hgRepo = implRepo; |
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220 } |
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221 |
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222 public boolean next(Nodeid nid, Path fname, Flags flags) { |
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223 WorkingDirFileWriter workingDirWriter = null; |
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224 try { |
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225 HgDataFile df = hgRepo.getRepo().getFileNode(fname); |
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226 int fileRevIndex = df.getRevisionIndex(nid); |
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227 // check out files based on manifest |
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228 workingDirWriter = new WorkingDirFileWriter(hgRepo); |
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229 workingDirWriter.processFile(df, fileRevIndex, flags); |
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230 lastWrittenFileSize = workingDirWriter.bytesWritten(); |
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231 lastFileMode = workingDirWriter.fmode(); |
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232 lastFileModificationTime = workingDirWriter.mtime(); |
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233 return true; |
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234 } catch (IOException ex) { |
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235 failure = new HgIOException("Failed to write down file revision", ex, workingDirWriter.getDestinationFile()); |
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236 } catch (HgRuntimeException ex) { |
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237 failure = new HgLibraryFailureException(ex); |
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238 } |
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239 return false; |
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240 } |
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241 |
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242 public int getLastFileMode() { |
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243 return lastFileMode; |
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244 } |
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245 |
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246 public int getLastFileModificationTime() { |
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247 return lastFileModificationTime; |
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248 } |
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249 |
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250 public int getLastFileSize() { |
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251 return lastWrittenFileSize; |
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252 } |
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253 |
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254 public void checkFailed() throws HgException { |
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255 if (failure != null) { |
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256 throw failure; |
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257 } |
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258 } |
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259 }; |
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260 } |