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annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 270:c6450b0b1fd5

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Avoid IAE:nullid when looking into stale merge/state file
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 24 Aug 2011 04:10:17 +0200
parents a6d19adc2636
children 35125450c804
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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a3a2e5deb320 Updated contact address to support@hg4j.com
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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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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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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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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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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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61 public static final String DEFAULT_BRANCH_NAME = "default";
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63 // temp aux marker method
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64 public static IllegalStateException notImplemented() {
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65 return new IllegalStateException("Not implemented");
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66 }
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68 private final File repoDir; // .hg folder
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69 private final File workingDir; // .hg/../
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70 private final String repoLocation;
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71 private final DataAccessProvider dataAccess;
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72 private final PathRewrite normalizePath;
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73 private final PathRewrite dataPathHelper;
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74 private final PathRewrite repoPathHelper;
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76 private HgChangelog changelog;
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77 private HgManifest manifest;
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78 private HgTags tags;
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79 private HgBranches branches;
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80 private HgMergeState mergeState;
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81 private SubrepoManager subRepos;
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83 // XXX perhaps, shall enable caching explicitly
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84 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>();
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86 private final org.tmatesoft.hg.internal.Internals impl = new org.tmatesoft.hg.internal.Internals();
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87 private HgIgnore ignore;
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88 private ConfigFile configFile;
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90 HgRepository(String repositoryPath) {
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91 repoDir = null;
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92 workingDir = null;
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93 repoLocation = repositoryPath;
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94 dataAccess = null;
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95 dataPathHelper = repoPathHelper = null;
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96 normalizePath = null;
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97 }
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99 HgRepository(String repositoryPath, File repositoryRoot) {
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100 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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101 assert repositoryPath != null;
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102 assert repositoryRoot != null;
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103 repoDir = repositoryRoot;
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104 workingDir = repoDir.getParentFile();
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105 if (workingDir == null) {
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106 throw new IllegalArgumentException(repoDir.toString());
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107 }
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108 repoLocation = repositoryPath;
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109 dataAccess = new DataAccessProvider();
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110 final boolean runningOnWindows = System.getProperty("os.name").indexOf("Windows") != -1;
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111 if (runningOnWindows) {
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112 normalizePath = new PathRewrite() {
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113
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114 public String rewrite(String path) {
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115 // TODO handle . and .. (although unlikely to face them from GUI client)
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116 path = path.replace('\\', '/').replace("//", "/");
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117 if (path.startsWith("/")) {
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118 path = path.substring(1);
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119 }
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120 return path;
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121 }
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122 };
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123 } else {
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124 normalizePath = new PathRewrite.Empty(); // or strip leading slash, perhaps?
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125 }
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126 parseRequires();
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127 dataPathHelper = impl.buildDataFilesHelper();
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128 repoPathHelper = impl.buildRepositoryFilesHelper();
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129 }
0
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130
145
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131 @Override
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132 public String toString() {
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133 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]";
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134 }
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135
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136 public String getLocation() {
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137 return repoLocation;
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138 }
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139
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140 public boolean isInvalid() {
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141 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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142 }
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143
97
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144 public HgChangelog getChangelog() {
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145 if (this.changelog == null) {
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146 String storagePath = repoPathHelper.rewrite("00changelog.i");
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147 RevlogStream content = resolve(Path.create(storagePath), true);
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148 this.changelog = new HgChangelog(this, content);
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149 }
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150 return this.changelog;
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151 }
2
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152
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153 public HgManifest getManifest() {
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154 if (this.manifest == null) {
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155 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true);
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156 this.manifest = new HgManifest(this, content);
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157 }
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158 return this.manifest;
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159 }
50
f1db8610da62 Log to consult (placeholder, for now) class to find out associated tags
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160
231
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161 public HgTags getTags() {
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162 if (tags == null) {
234
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163 tags = new HgTags(this);
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164 try {
234
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165 HgDataFile hgTags = getFileNode(".hgtags");
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166 if (hgTags.exists()) {
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167 for (int i = 0; i <= hgTags.getLastRevision(); i++) { // FIXME in fact, would be handy to have walk(start,end)
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168 // method for data files as well, though it looks odd.
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169 try {
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diff changeset
170 ByteArrayChannel sink = new ByteArrayChannel();
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171 hgTags.content(i, sink);
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172 final String content = new String(sink.toArray(), "UTF8");
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173 tags.readGlobal(new StringReader(content));
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174 } catch (CancelledException ex) {
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diff changeset
175 ex.printStackTrace(); // IGNORE, can't happen, we did not configure cancellation
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176 } catch (HgDataStreamException ex) {
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diff changeset
177 ex.printStackTrace(); // FIXME need to react
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diff changeset
178 } catch (IOException ex) {
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179 // UnsupportedEncodingException can't happen (UTF8)
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diff changeset
180 // only from readGlobal. Need to reconsider exceptions thrown from there
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diff changeset
181 ex.printStackTrace(); // XXX need to decide what to do this. failure to read single revision shall not break complete cycle
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diff changeset
182 }
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diff changeset
183 }
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184 }
252
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diff changeset
185 tags.readGlobal(new File(getWorkingDir(), ".hgtags")); // XXX replace with HgDataFile.workingCopy
104
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diff changeset
186 tags.readLocal(new File(repoDir, "localtags"));
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diff changeset
187 } catch (IOException ex) {
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188 ex.printStackTrace(); // FIXME log or othewise report
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189 }
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190 }
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191 return tags;
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192 }
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193
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diff changeset
194 public HgBranches getBranches() {
220
8de327242aa0 Basic information about branches
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195 if (branches == null) {
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196 branches = new HgBranches(this);
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197 branches.collect(ProgressSupport.Factory.get(null));
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198 }
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199 return branches;
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200 }
231
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diff changeset
201
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diff changeset
202 @Experimental(reason="Perhaps, shall not cache instance, and provide loadMergeState as it may change often")
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diff changeset
203 public HgMergeState getMergeState() {
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204 if (mergeState == null) {
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diff changeset
205 mergeState = new HgMergeState(this);
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diff changeset
206 }
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207 return mergeState;
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diff changeset
208 }
220
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diff changeset
209
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diff changeset
210 public HgDataFile getFileNode(String path) {
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diff changeset
211 String nPath = normalizePath.rewrite(path);
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diff changeset
212 String storagePath = dataPathHelper.rewrite(nPath);
202
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diff changeset
213 RevlogStream content = resolve(Path.create(storagePath), false);
115
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diff changeset
214 Path p = Path.create(nPath);
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diff changeset
215 if (content == null) {
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diff changeset
216 return new HgDataFile(this, p);
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diff changeset
217 }
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diff changeset
218 return new HgDataFile(this, p, content);
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diff changeset
219 }
1
a3576694a4d1 Repository detection from local/specified directory
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diff changeset
220
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diff changeset
221 public HgDataFile getFileNode(Path path) {
77
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diff changeset
222 String storagePath = dataPathHelper.rewrite(path.toString());
202
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diff changeset
223 RevlogStream content = resolve(Path.create(storagePath), false);
115
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diff changeset
224 // XXX no content when no file? or HgDataFile.exists() to detect that?
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diff changeset
225 if (content == null) {
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diff changeset
226 return new HgDataFile(this, path);
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diff changeset
227 }
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diff changeset
228 return new HgDataFile(this, path, content);
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diff changeset
229 }
2
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diff changeset
230
142
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diff changeset
231 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/
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diff changeset
232 public PathRewrite getToRepoPathHelper() {
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diff changeset
233 return normalizePath;
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diff changeset
234 }
235
fd845a53f53d Experimental access to working dir parents
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diff changeset
235
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diff changeset
236 @Experimental(reason="return type and possible values (presently null, perhaps Nodeid.NULL) may get changed")
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diff changeset
237 public Pair<Nodeid,Nodeid> getWorkingCopyParents() {
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diff changeset
238 Nodeid[] p = loadDirstate().parents();
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diff changeset
239 return new Pair<Nodeid,Nodeid>(NULL == p[0] ? null : p[0], NULL == p[1] ? null : p[1]);
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diff changeset
240 }
252
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diff changeset
241
a6d19adc2636 HgRepository.getWorkingCopyBranchName() to retrieve branch associated with working directory
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diff changeset
242 /**
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diff changeset
243 * @return name of the branch associated with working directory, never <code>null</code>.
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244 */
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245 public String getWorkingCopyBranchName() {
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246 return loadDirstate().branch();
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247 }
2
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248
237
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249 /**
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250 * @return location where user files (shall) reside
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251 */
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252 public File getWorkingDir() {
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253 return workingDir;
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254 }
239
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255
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256 /**
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257 * Provides access to sub-repositories defined in this repository. Enumerated sub-repositories are those directly
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258 * known, not recursive collection of all nested sub-repositories.
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259 * @return list of all known sub-repositories in this repository, or empty list if none found.
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260 */
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261 public List<HgSubrepoLocation> getSubrepositories() {
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262 if (subRepos == null) {
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263 subRepos = new SubrepoManager(this);
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264 }
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265 return subRepos.all();
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266 }
237
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267
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268 // shall be of use only for internal classes
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269 /*package-local*/ File getRepositoryRoot() {
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270 return repoDir;
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271 }
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272
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273 // 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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274 /*package-local*/ final HgDirstate loadDirstate() {
252
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275 return new HgDirstate(this, new File(repoDir, "dirstate"));
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276 }
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277
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278 // package-local, see comment for loadDirstate
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279 /*package-local*/ final HgIgnore getIgnore() {
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280 // TODO read config for additional locations
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281 if (ignore == null) {
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282 ignore = new HgIgnore();
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283 try {
252
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284 File ignoreFile = new File(getWorkingDir(), ".hgignore");
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285 ignore.read(ignoreFile);
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286 } catch (IOException ex) {
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287 ex.printStackTrace(); // log warn
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288 }
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289 }
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290 return ignore;
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291 }
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292
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293 /*package-local*/ DataAccessProvider getDataAccess() {
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294 return dataAccess;
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295 }
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296
2
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297 /**
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298 * Perhaps, should be separate interface, like ContentLookup
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299 * path - repository storage path (i.e. one usually with .i or .d)
2
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300 */
202
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301 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) {
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302 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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303 RevlogStream cached = ref == null ? null : ref.get();
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304 if (cached != null) {
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305 return cached;
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306 }
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307 File f = new File(repoDir, path.toString());
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308 if (f.exists()) {
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309 RevlogStream s = new RevlogStream(dataAccess, f);
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310 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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311 return s;
202
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312 } else {
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313 if (shallFakeNonExistent) {
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314 try {
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315 File fake = File.createTempFile(f.getName(), null);
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316 fake.deleteOnExit();
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317 return new RevlogStream(dataAccess, fake);
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318 } catch (IOException ex) {
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319 ex.printStackTrace(); // FIXME report in debug
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320 }
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321 }
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322 }
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323 return null; // XXX empty stream instead?
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324 }
114
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325
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326 // can't expose internal class, otherwise seems reasonable to have it in API
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327 /*package-local*/ ConfigFile getConfigFile() {
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328 if (configFile == null) {
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329 configFile = impl.newConfigFile();
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330 configFile.addLocation(new File(System.getProperty("user.home"), ".hgrc"));
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331 // last one, overrides anything else
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332 // <repo>/.hg/hgrc
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333 configFile.addLocation(new File(getRepositoryRoot(), "hgrc"));
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334 }
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335 return configFile;
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336 }
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337
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338 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) {
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339 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo));
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340 }
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341
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342 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) {
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343 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo));
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344 }
237
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345
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346 /*package-local*/ File getFile(HgDataFile dataFile) {
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347 return new File(getWorkingDir(), dataFile.getPath().toString());
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348 }
114
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349
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350 private List<Filter> instantiateFilters(Path p, Filter.Options opts) {
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351 List<Filter.Factory> factories = impl.getFilters(this, getConfigFile());
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352 if (factories.isEmpty()) {
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353 return Collections.emptyList();
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354 }
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355 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size());
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356 for (Filter.Factory ff : factories) {
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357 Filter f = ff.create(p, opts);
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358 if (f != null) {
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359 rv.add(f);
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360 }
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361 }
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362 return rv;
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diff changeset
363 }
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364
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365 private void parseRequires() {
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366 new RequiresFile().parse(impl, new File(repoDir, "requires"));
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367 }
114
46291ec605a0 Filters to read and initialize according to configuration files
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dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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