Mercurial > jhg
annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 115:c0cc2535462c
Introduced channels to pipeline (and easily filter) data streams
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 03 Feb 2011 23:32:08 +0100 |
parents | 46291ec605a0 |
children | 4a948ec83980 |
rev | line source |
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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 java.io.File; |
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20 import java.io.IOException; |
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21 import java.lang.ref.SoftReference; |
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22 import java.util.ArrayList; |
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23 import java.util.Collections; |
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24 import java.util.HashMap; |
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25 import java.util.List; |
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26 |
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27 import org.tmatesoft.hg.core.Path; |
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28 import org.tmatesoft.hg.internal.ConfigFile; |
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29 import org.tmatesoft.hg.internal.DataAccessProvider; |
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30 import org.tmatesoft.hg.internal.Filter; |
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31 import org.tmatesoft.hg.internal.RequiresFile; |
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32 import org.tmatesoft.hg.internal.RevlogStream; |
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33 import org.tmatesoft.hg.util.FileWalker; |
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34 import org.tmatesoft.hg.util.PathRewrite; |
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35 |
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36 |
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37 |
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38 /** |
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39 * Shall be as state-less as possible, all the caching happens outside the repo, in commands/walkers |
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40 * |
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41 * @author Artem Tikhomirov |
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42 * @author TMate Software Ltd. |
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43 */ |
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44 public final class HgRepository { |
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45 |
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46 public static final int TIP = -1; |
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47 public static final int BAD_REVISION = Integer.MIN_VALUE; |
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48 public static final int WORKING_COPY = -2; |
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49 |
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50 // temp aux marker method |
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51 public static IllegalStateException notImplemented() { |
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52 return new IllegalStateException("Not implemented"); |
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53 } |
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54 |
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55 private final File repoDir; // .hg folder |
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56 private final String repoLocation; |
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57 private final DataAccessProvider dataAccess; |
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58 private final PathRewrite normalizePath = new PathRewrite() { |
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59 |
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60 public String rewrite(String path) { |
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61 // TODO handle . and .. (although unlikely to face them from GUI client) |
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62 path = path.replace('\\', '/').replace("//", "/"); |
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63 if (path.startsWith("/")) { |
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64 path = path.substring(1); |
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65 } |
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66 return path; |
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67 } |
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68 }; |
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69 private final PathRewrite dataPathHelper; |
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70 private final PathRewrite repoPathHelper; |
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71 |
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72 private HgChangelog changelog; |
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73 private HgManifest manifest; |
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74 private HgTags tags; |
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75 // XXX perhaps, shall enable caching explicitly |
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76 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>(); |
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77 |
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78 private final org.tmatesoft.hg.internal.Internals impl = new org.tmatesoft.hg.internal.Internals(); |
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79 private HgIgnore ignore; |
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80 private ConfigFile configFile; |
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81 |
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82 HgRepository(String repositoryPath) { |
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83 repoDir = null; |
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84 repoLocation = repositoryPath; |
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85 dataAccess = null; |
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86 dataPathHelper = repoPathHelper = null; |
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87 } |
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88 |
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89 HgRepository(File repositoryRoot) throws IOException { |
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90 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory(); |
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91 repoDir = repositoryRoot; |
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92 repoLocation = repositoryRoot.getParentFile().getCanonicalPath(); |
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93 dataAccess = new DataAccessProvider(); |
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94 parseRequires(); |
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95 dataPathHelper = impl.buildDataFilesHelper(); |
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96 repoPathHelper = impl.buildRepositoryFilesHelper(); |
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97 } |
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98 |
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99 |
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100 public String getLocation() { |
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101 return repoLocation; |
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102 } |
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103 |
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104 public boolean isInvalid() { |
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105 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory(); |
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106 } |
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107 |
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108 public HgChangelog getChangelog() { |
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109 if (this.changelog == null) { |
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110 String storagePath = repoPathHelper.rewrite("00changelog.i"); |
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111 RevlogStream content = resolve(Path.create(storagePath)); |
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112 this.changelog = new HgChangelog(this, content); |
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113 } |
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114 return this.changelog; |
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115 } |
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116 |
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117 public HgManifest getManifest() { |
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118 if (this.manifest == null) { |
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119 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i"))); |
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120 this.manifest = new HgManifest(this, content); |
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121 } |
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122 return this.manifest; |
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123 } |
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124 |
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125 public final HgTags getTags() { |
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126 if (tags == null) { |
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127 tags = new HgTags(); |
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128 try { |
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129 tags.readGlobal(new File(repoDir.getParentFile(), ".hgtags")); |
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130 tags.readLocal(new File(repoDir, "localtags")); |
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131 } catch (IOException ex) { |
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132 ex.printStackTrace(); // FIXME log or othewise report |
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133 } |
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134 } |
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135 return tags; |
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136 } |
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137 |
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138 public HgDataFile getFileNode(String path) { |
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139 String nPath = normalizePath.rewrite(path); |
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140 String storagePath = dataPathHelper.rewrite(nPath); |
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141 RevlogStream content = resolve(Path.create(storagePath)); |
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142 Path p = Path.create(nPath); |
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143 if (content == null) { |
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144 return new HgDataFile(this, p); |
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145 } |
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146 return new HgDataFile(this, p, content); |
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147 } |
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148 |
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149 public HgDataFile getFileNode(Path path) { |
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150 String storagePath = dataPathHelper.rewrite(path.toString()); |
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151 RevlogStream content = resolve(Path.create(storagePath)); |
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152 // XXX no content when no file? or HgDataFile.exists() to detect that? |
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153 if (content == null) { |
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154 return new HgDataFile(this, path); |
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155 } |
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156 return new HgDataFile(this, path, content); |
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157 } |
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158 |
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159 public PathRewrite getPathHelper() { // Really need to be public? |
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160 return normalizePath; |
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161 } |
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162 |
114
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163 // local to hide use of io.File. |
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164 /*package-local*/ File getRepositoryRoot() { |
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165 return repoDir; |
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166 } |
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167 |
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168 // 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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169 /*package-local*/ final HgDirstate loadDirstate() { |
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170 return new HgDirstate(getDataAccess(), new File(repoDir, "dirstate")); |
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171 } |
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172 |
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173 // package-local, see comment for loadDirstate |
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174 /*package-local*/ final HgIgnore getIgnore() { |
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175 // TODO read config for additional locations |
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176 if (ignore == null) { |
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177 ignore = new HgIgnore(); |
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178 try { |
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179 File ignoreFile = new File(repoDir.getParentFile(), ".hgignore"); |
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180 ignore.read(ignoreFile); |
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181 } catch (IOException ex) { |
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182 ex.printStackTrace(); // log warn |
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183 } |
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184 } |
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185 return ignore; |
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186 } |
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187 |
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188 /*package-local*/ DataAccessProvider getDataAccess() { |
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189 return dataAccess; |
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190 } |
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191 |
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192 // FIXME not sure repository shall create walkers |
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193 /*package-local*/ FileWalker createWorkingDirWalker() { |
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194 return new FileWalker(repoDir.getParentFile()); |
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195 } |
9
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Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
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196 |
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197 /** |
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198 * Perhaps, should be separate interface, like ContentLookup |
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199 * path - repository storage path (i.e. one usually with .i or .d) |
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200 */ |
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201 /*package-local*/ RevlogStream resolve(Path path) { |
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202 final SoftReference<RevlogStream> ref = streamsCache.get(path); |
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203 RevlogStream cached = ref == null ? null : ref.get(); |
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204 if (cached != null) { |
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205 return cached; |
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206 } |
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207 File f = new File(repoDir, path.toString()); |
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208 if (f.exists()) { |
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209 RevlogStream s = new RevlogStream(dataAccess, f); |
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210 streamsCache.put(path, new SoftReference<RevlogStream>(s)); |
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211 return s; |
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212 } |
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213 return null; // XXX empty stream instead? |
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214 } |
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215 |
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216 // can't expose internal class, otherwise seems reasonable to have it in API |
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217 /*package-local*/ ConfigFile getConfigFile() { |
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218 if (configFile == null) { |
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219 configFile = impl.newConfigFile(); |
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220 configFile.addLocation(new File(System.getProperty("user.home"), ".hgrc")); |
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221 // last one, overrides anything else |
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222 // <repo>/.hg/hgrc |
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223 configFile.addLocation(new File(getRepositoryRoot(), "hgrc")); |
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224 } |
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225 return configFile; |
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226 } |
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227 |
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228 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) { |
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229 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo)); |
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230 } |
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231 |
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232 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) { |
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233 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo)); |
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234 } |
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235 |
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236 private List<Filter> instantiateFilters(Path p, Filter.Options opts) { |
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237 List<Filter.Factory> factories = impl.getFilters(this, getConfigFile()); |
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238 if (factories.isEmpty()) { |
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239 return Collections.emptyList(); |
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240 } |
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241 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size()); |
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242 for (Filter.Factory ff : factories) { |
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243 Filter f = ff.create(p, opts); |
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244 if (f != null) { |
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245 rv.add(f); |
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246 } |
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247 } |
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248 return rv; |
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249 } |
74
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250 |
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251 private void parseRequires() { |
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252 new RequiresFile().parse(impl, new File(repoDir, "requires")); |
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253 } |
114
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254 |
0
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255 } |