Mercurial > hg4j
annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 248:3fbfce107f94
Issue 8: Means to find out information about given file at specific changeset. Inner ManifestRevisionInspector got promoted to ManifestRevision
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Fri, 12 Aug 2011 18:48:57 +0200 |
parents | df9d2854d3d6 |
children | a6d19adc2636 |
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1 /* |
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2 * Copyright (c) 2010-2011 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.repo; |
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18 |
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19 import static org.tmatesoft.hg.core.Nodeid.NULL; |
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20 |
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21 import java.io.File; |
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22 import java.io.IOException; |
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23 import java.io.StringReader; |
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24 import java.lang.ref.SoftReference; |
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25 import java.util.ArrayList; |
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26 import java.util.Collections; |
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27 import java.util.HashMap; |
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28 import java.util.List; |
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29 |
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30 import org.tmatesoft.hg.core.HgDataStreamException; |
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31 import org.tmatesoft.hg.core.Nodeid; |
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32 import org.tmatesoft.hg.internal.ByteArrayChannel; |
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33 import org.tmatesoft.hg.internal.ConfigFile; |
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34 import org.tmatesoft.hg.internal.DataAccessProvider; |
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35 import org.tmatesoft.hg.internal.Experimental; |
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36 import org.tmatesoft.hg.internal.Filter; |
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37 import org.tmatesoft.hg.internal.RequiresFile; |
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38 import org.tmatesoft.hg.internal.RevlogStream; |
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39 import org.tmatesoft.hg.internal.SubrepoManager; |
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40 import org.tmatesoft.hg.util.CancelledException; |
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41 import org.tmatesoft.hg.util.Pair; |
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42 import org.tmatesoft.hg.util.Path; |
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43 import org.tmatesoft.hg.util.PathRewrite; |
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44 import org.tmatesoft.hg.util.ProgressSupport; |
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45 |
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46 |
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47 |
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48 /** |
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49 * Shall be as state-less as possible, all the caching happens outside the repo, in commands/walkers |
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50 * |
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51 * @author Artem Tikhomirov |
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52 * @author TMate Software Ltd. |
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53 */ |
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54 public final class HgRepository { |
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55 |
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56 // if new constants added, consider fixing HgInternals#wrongLocalRevision |
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57 public static final int TIP = -3; |
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58 public static final int BAD_REVISION = Integer.MIN_VALUE; |
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59 public static final int WORKING_COPY = -2; |
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60 |
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61 // temp aux marker method |
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62 public static IllegalStateException notImplemented() { |
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63 return new IllegalStateException("Not implemented"); |
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64 } |
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65 |
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66 private final File repoDir; // .hg folder |
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67 private final File workingDir; // .hg/../ |
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68 private final String repoLocation; |
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69 private final DataAccessProvider dataAccess; |
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70 private final PathRewrite normalizePath; |
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71 private final PathRewrite dataPathHelper; |
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72 private final PathRewrite repoPathHelper; |
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73 |
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74 private HgChangelog changelog; |
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75 private HgManifest manifest; |
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76 private HgTags tags; |
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77 private HgBranches branches; |
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78 private HgMergeState mergeState; |
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79 private SubrepoManager subRepos; |
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80 |
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81 // XXX perhaps, shall enable caching explicitly |
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82 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>(); |
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83 |
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84 private final org.tmatesoft.hg.internal.Internals impl = new org.tmatesoft.hg.internal.Internals(); |
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85 private HgIgnore ignore; |
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86 private ConfigFile configFile; |
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87 |
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88 HgRepository(String repositoryPath) { |
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89 repoDir = null; |
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90 workingDir = null; |
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91 repoLocation = repositoryPath; |
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92 dataAccess = null; |
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93 dataPathHelper = repoPathHelper = null; |
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94 normalizePath = null; |
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95 } |
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96 |
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97 HgRepository(String repositoryPath, File repositoryRoot) { |
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98 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory(); |
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99 assert repositoryPath != null; |
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100 assert repositoryRoot != null; |
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101 repoDir = repositoryRoot; |
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102 workingDir = repoDir.getParentFile(); |
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103 if (workingDir == null) { |
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104 throw new IllegalArgumentException(repoDir.toString()); |
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105 } |
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106 repoLocation = repositoryPath; |
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107 dataAccess = new DataAccessProvider(); |
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108 final boolean runningOnWindows = System.getProperty("os.name").indexOf("Windows") != -1; |
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109 if (runningOnWindows) { |
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110 normalizePath = new PathRewrite() { |
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111 |
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112 public String rewrite(String path) { |
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113 // TODO handle . and .. (although unlikely to face them from GUI client) |
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114 path = path.replace('\\', '/').replace("//", "/"); |
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115 if (path.startsWith("/")) { |
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116 path = path.substring(1); |
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117 } |
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118 return path; |
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119 } |
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120 }; |
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121 } else { |
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122 normalizePath = new PathRewrite.Empty(); // or strip leading slash, perhaps? |
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123 } |
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124 parseRequires(); |
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125 dataPathHelper = impl.buildDataFilesHelper(); |
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126 repoPathHelper = impl.buildRepositoryFilesHelper(); |
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127 } |
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128 |
145
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129 @Override |
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130 public String toString() { |
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131 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]"; |
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132 } |
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133 |
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134 public String getLocation() { |
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135 return repoLocation; |
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136 } |
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137 |
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138 public boolean isInvalid() { |
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139 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory(); |
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140 } |
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141 |
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142 public HgChangelog getChangelog() { |
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143 if (this.changelog == null) { |
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144 String storagePath = repoPathHelper.rewrite("00changelog.i"); |
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145 RevlogStream content = resolve(Path.create(storagePath), true); |
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146 this.changelog = new HgChangelog(this, content); |
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147 } |
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148 return this.changelog; |
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149 } |
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150 |
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151 public HgManifest getManifest() { |
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152 if (this.manifest == null) { |
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153 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true); |
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154 this.manifest = new HgManifest(this, content); |
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155 } |
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156 return this.manifest; |
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157 } |
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158 |
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159 public HgTags getTags() { |
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160 if (tags == null) { |
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161 tags = new HgTags(this); |
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162 try { |
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163 HgDataFile hgTags = getFileNode(".hgtags"); |
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164 if (hgTags.exists()) { |
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165 for (int i = 0; i <= hgTags.getLastRevision(); i++) { // FIXME in fact, would be handy to have walk(start,end) |
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166 // method for data files as well, though it looks odd. |
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167 try { |
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168 ByteArrayChannel sink = new ByteArrayChannel(); |
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169 hgTags.content(i, sink); |
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170 final String content = new String(sink.toArray(), "UTF8"); |
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171 tags.readGlobal(new StringReader(content)); |
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172 } catch (CancelledException ex) { |
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173 ex.printStackTrace(); // IGNORE, can't happen, we did not configure cancellation |
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174 } catch (HgDataStreamException ex) { |
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175 ex.printStackTrace(); // FIXME need to react |
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176 } catch (IOException ex) { |
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177 // UnsupportedEncodingException can't happen (UTF8) |
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178 // only from readGlobal. Need to reconsider exceptions thrown from there |
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179 ex.printStackTrace(); // XXX need to decide what to do this. failure to read single revision shall not break complete cycle |
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180 } |
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181 } |
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182 } |
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183 tags.readGlobal(new File(repoDir.getParentFile(), ".hgtags")); // XXX replace with HgDataFile.workingCopy |
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184 tags.readLocal(new File(repoDir, "localtags")); |
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185 } catch (IOException ex) { |
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186 ex.printStackTrace(); // FIXME log or othewise report |
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187 } |
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188 } |
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189 return tags; |
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190 } |
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191 |
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192 public HgBranches getBranches() { |
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193 if (branches == null) { |
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194 branches = new HgBranches(this); |
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195 branches.collect(ProgressSupport.Factory.get(null)); |
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196 } |
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197 return branches; |
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198 } |
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199 |
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200 @Experimental(reason="Perhaps, shall not cache instance, and provide loadMergeState as it may change often") |
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201 public HgMergeState getMergeState() { |
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202 if (mergeState == null) { |
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203 mergeState = new HgMergeState(this); |
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204 } |
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205 return mergeState; |
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206 } |
220
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207 |
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208 public HgDataFile getFileNode(String path) { |
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209 String nPath = normalizePath.rewrite(path); |
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210 String storagePath = dataPathHelper.rewrite(nPath); |
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211 RevlogStream content = resolve(Path.create(storagePath), false); |
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Introduced channels to pipeline (and easily filter) data streams
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212 Path p = Path.create(nPath); |
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213 if (content == null) { |
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214 return new HgDataFile(this, p); |
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215 } |
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216 return new HgDataFile(this, p, content); |
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217 } |
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218 |
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219 public HgDataFile getFileNode(Path path) { |
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220 String storagePath = dataPathHelper.rewrite(path.toString()); |
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221 RevlogStream content = resolve(Path.create(storagePath), false); |
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222 // XXX no content when no file? or HgDataFile.exists() to detect that? |
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223 if (content == null) { |
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224 return new HgDataFile(this, path); |
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225 } |
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226 return new HgDataFile(this, path, content); |
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227 } |
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228 |
142
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229 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/ |
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230 public PathRewrite getToRepoPathHelper() { |
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231 return normalizePath; |
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232 } |
235
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233 |
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234 @Experimental(reason="return type and possible values (presently null, perhaps Nodeid.NULL) may get changed") |
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235 public Pair<Nodeid,Nodeid> getWorkingCopyParents() { |
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236 Nodeid[] p = loadDirstate().parents(); |
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237 return new Pair<Nodeid,Nodeid>(NULL == p[0] ? null : p[0], NULL == p[1] ? null : p[1]); |
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238 } |
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239 |
237
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240 /** |
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241 * @return location where user files (shall) reside |
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242 */ |
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243 public File getWorkingDir() { |
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244 return workingDir; |
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245 } |
239
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246 |
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247 /** |
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248 * Provides access to sub-repositories defined in this repository. Enumerated sub-repositories are those directly |
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249 * known, not recursive collection of all nested sub-repositories. |
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250 * @return list of all known sub-repositories in this repository, or empty list if none found. |
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251 */ |
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252 public List<HgSubrepoLocation> getSubrepositories() { |
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253 if (subRepos == null) { |
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254 subRepos = new SubrepoManager(this); |
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255 } |
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256 return subRepos.all(); |
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257 } |
237
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258 |
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259 // shall be of use only for internal classes |
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260 /*package-local*/ File getRepositoryRoot() { |
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261 return repoDir; |
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262 } |
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263 |
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264 // XXX package-local, unless there are cases when required from outside (guess, working dir/revision walkers may hide dirstate access and no public visibility needed) |
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265 /*package-local*/ final HgDirstate loadDirstate() { |
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266 return new HgDirstate(getDataAccess(), new File(repoDir, "dirstate")); |
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267 } |
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268 |
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269 // package-local, see comment for loadDirstate |
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270 /*package-local*/ final HgIgnore getIgnore() { |
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271 // TODO read config for additional locations |
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272 if (ignore == null) { |
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273 ignore = new HgIgnore(); |
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274 try { |
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275 File ignoreFile = new File(repoDir.getParentFile(), ".hgignore"); |
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276 ignore.read(ignoreFile); |
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277 } catch (IOException ex) { |
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278 ex.printStackTrace(); // log warn |
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279 } |
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280 } |
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281 return ignore; |
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282 } |
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283 |
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284 /*package-local*/ DataAccessProvider getDataAccess() { |
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285 return dataAccess; |
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286 } |
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287 |
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288 /** |
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289 * Perhaps, should be separate interface, like ContentLookup |
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290 * path - repository storage path (i.e. one usually with .i or .d) |
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291 */ |
202
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292 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) { |
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293 final SoftReference<RevlogStream> ref = streamsCache.get(path); |
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294 RevlogStream cached = ref == null ? null : ref.get(); |
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295 if (cached != null) { |
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296 return cached; |
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297 } |
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298 File f = new File(repoDir, path.toString()); |
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299 if (f.exists()) { |
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300 RevlogStream s = new RevlogStream(dataAccess, f); |
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301 streamsCache.put(path, new SoftReference<RevlogStream>(s)); |
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302 return s; |
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303 } else { |
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304 if (shallFakeNonExistent) { |
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305 try { |
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306 File fake = File.createTempFile(f.getName(), null); |
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307 fake.deleteOnExit(); |
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308 return new RevlogStream(dataAccess, fake); |
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309 } catch (IOException ex) { |
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310 ex.printStackTrace(); // FIXME report in debug |
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311 } |
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312 } |
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313 } |
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314 return null; // XXX empty stream instead? |
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315 } |
114
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316 |
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317 // can't expose internal class, otherwise seems reasonable to have it in API |
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318 /*package-local*/ ConfigFile getConfigFile() { |
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319 if (configFile == null) { |
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320 configFile = impl.newConfigFile(); |
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321 configFile.addLocation(new File(System.getProperty("user.home"), ".hgrc")); |
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322 // last one, overrides anything else |
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323 // <repo>/.hg/hgrc |
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324 configFile.addLocation(new File(getRepositoryRoot(), "hgrc")); |
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325 } |
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326 return configFile; |
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327 } |
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328 |
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329 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) { |
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330 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo)); |
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331 } |
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332 |
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333 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) { |
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334 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo)); |
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335 } |
237
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336 |
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337 /*package-local*/ File getFile(HgDataFile dataFile) { |
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338 return new File(getWorkingDir(), dataFile.getPath().toString()); |
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339 } |
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340 |
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341 private List<Filter> instantiateFilters(Path p, Filter.Options opts) { |
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342 List<Filter.Factory> factories = impl.getFilters(this, getConfigFile()); |
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343 if (factories.isEmpty()) { |
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344 return Collections.emptyList(); |
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345 } |
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346 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size()); |
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347 for (Filter.Factory ff : factories) { |
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348 Filter f = ff.create(p, opts); |
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349 if (f != null) { |
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350 rv.add(f); |
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351 } |
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352 } |
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353 return rv; |
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354 } |
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355 |
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356 private void parseRequires() { |
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357 new RequiresFile().parse(impl, new File(repoDir, "requires")); |
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358 } |
114
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359 |
0
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360 } |