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annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 237:6e1373b54e9b

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Allow access to working copy content through HgDataFile. Give access to repository's working dir
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 10 Jun 2011 04:35:21 +0200
parents fd845a53f53d
children df9d2854d3d6
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 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.util.CancelledException;
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40 import org.tmatesoft.hg.util.Pair;
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41 import org.tmatesoft.hg.util.Path;
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42 import org.tmatesoft.hg.util.PathRewrite;
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43 import org.tmatesoft.hg.util.ProgressSupport;
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47 /**
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48 * Shall be as state-less as possible, all the caching happens outside the repo, in commands/walkers
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49 *
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50 * @author Artem Tikhomirov
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51 * @author TMate Software Ltd.
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52 */
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53 public final class HgRepository {
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55 // if new constants added, consider fixing HgInternals#wrongLocalRevision
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56 public static final int TIP = -3;
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57 public static final int BAD_REVISION = Integer.MIN_VALUE;
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58 public static final int WORKING_COPY = -2;
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59
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60 // temp aux marker method
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61 public static IllegalStateException notImplemented() {
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62 return new IllegalStateException("Not implemented");
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63 }
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65 private final File repoDir; // .hg folder
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66 private final File workingDir; // .hg/../
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67 private final String repoLocation;
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68 private final DataAccessProvider dataAccess;
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69 private final PathRewrite normalizePath;
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70 private final PathRewrite dataPathHelper;
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71 private final PathRewrite repoPathHelper;
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72
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73 private HgChangelog changelog;
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74 private HgManifest manifest;
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75 private HgTags tags;
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76 private HgBranches branches;
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77 private HgMergeState mergeState;
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79 // XXX perhaps, shall enable caching explicitly
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80 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>();
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82 private final org.tmatesoft.hg.internal.Internals impl = new org.tmatesoft.hg.internal.Internals();
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83 private HgIgnore ignore;
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84 private ConfigFile configFile;
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86 HgRepository(String repositoryPath) {
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87 repoDir = null;
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88 workingDir = null;
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89 repoLocation = repositoryPath;
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90 dataAccess = null;
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91 dataPathHelper = repoPathHelper = null;
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92 normalizePath = null;
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93 }
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95 HgRepository(String repositoryPath, File repositoryRoot) {
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96 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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97 assert repositoryPath != null;
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98 assert repositoryRoot != null;
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99 repoDir = repositoryRoot;
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100 workingDir = repoDir.getParentFile();
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101 if (workingDir == null) {
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102 throw new IllegalArgumentException(repoDir.toString());
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103 }
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104 repoLocation = repositoryPath;
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105 dataAccess = new DataAccessProvider();
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106 final boolean runningOnWindows = System.getProperty("os.name").indexOf("Windows") != -1;
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107 if (runningOnWindows) {
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108 normalizePath = new PathRewrite() {
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109
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110 public String rewrite(String path) {
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111 // TODO handle . and .. (although unlikely to face them from GUI client)
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112 path = path.replace('\\', '/').replace("//", "/");
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113 if (path.startsWith("/")) {
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114 path = path.substring(1);
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115 }
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116 return path;
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117 }
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118 };
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119 } else {
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120 normalizePath = new PathRewrite.Empty(); // or strip leading slash, perhaps?
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121 }
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122 parseRequires();
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123 dataPathHelper = impl.buildDataFilesHelper();
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124 repoPathHelper = impl.buildRepositoryFilesHelper();
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125 }
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126
145
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127 @Override
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128 public String toString() {
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129 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]";
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130 }
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131
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132 public String getLocation() {
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133 return repoLocation;
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134 }
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135
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136 public boolean isInvalid() {
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137 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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138 }
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139
97
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140 public HgChangelog getChangelog() {
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141 if (this.changelog == null) {
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142 String storagePath = repoPathHelper.rewrite("00changelog.i");
202
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143 RevlogStream content = resolve(Path.create(storagePath), true);
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144 this.changelog = new HgChangelog(this, content);
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145 }
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146 return this.changelog;
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147 }
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148
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149 public HgManifest getManifest() {
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150 if (this.manifest == null) {
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151 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true);
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152 this.manifest = new HgManifest(this, content);
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153 }
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154 return this.manifest;
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155 }
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156
231
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157 public HgTags getTags() {
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158 if (tags == null) {
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159 tags = new HgTags(this);
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160 try {
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161 HgDataFile hgTags = getFileNode(".hgtags");
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162 if (hgTags.exists()) {
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163 for (int i = 0; i <= hgTags.getLastRevision(); i++) { // FIXME in fact, would be handy to have walk(start,end)
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164 // method for data files as well, though it looks odd.
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165 try {
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166 ByteArrayChannel sink = new ByteArrayChannel();
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167 hgTags.content(i, sink);
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168 final String content = new String(sink.toArray(), "UTF8");
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169 tags.readGlobal(new StringReader(content));
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170 } catch (CancelledException ex) {
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171 ex.printStackTrace(); // IGNORE, can't happen, we did not configure cancellation
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172 } catch (HgDataStreamException ex) {
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173 ex.printStackTrace(); // FIXME need to react
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174 } catch (IOException ex) {
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175 // UnsupportedEncodingException can't happen (UTF8)
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176 // only from readGlobal. Need to reconsider exceptions thrown from there
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177 ex.printStackTrace(); // XXX need to decide what to do this. failure to read single revision shall not break complete cycle
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178 }
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179 }
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180 }
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181 tags.readGlobal(new File(repoDir.getParentFile(), ".hgtags")); // XXX replace with HgDataFile.workingCopy
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182 tags.readLocal(new File(repoDir, "localtags"));
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183 } catch (IOException ex) {
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184 ex.printStackTrace(); // FIXME log or othewise report
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185 }
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186 }
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187 return tags;
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188 }
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189
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190 public HgBranches getBranches() {
220
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191 if (branches == null) {
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192 branches = new HgBranches(this);
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193 branches.collect(ProgressSupport.Factory.get(null));
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194 }
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195 return branches;
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196 }
231
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197
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198 @Experimental(reason="Perhaps, shall not cache instance, and provide loadMergeState as it may change often")
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199 public HgMergeState getMergeState() {
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200 if (mergeState == null) {
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201 mergeState = new HgMergeState(this);
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202 }
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203 return mergeState;
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204 }
220
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205
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206 public HgDataFile getFileNode(String path) {
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207 String nPath = normalizePath.rewrite(path);
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208 String storagePath = dataPathHelper.rewrite(nPath);
202
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209 RevlogStream content = resolve(Path.create(storagePath), false);
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210 Path p = Path.create(nPath);
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211 if (content == null) {
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212 return new HgDataFile(this, p);
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213 }
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214 return new HgDataFile(this, p, content);
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215 }
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diff changeset
216
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diff changeset
217 public HgDataFile getFileNode(Path path) {
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218 String storagePath = dataPathHelper.rewrite(path.toString());
202
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219 RevlogStream content = resolve(Path.create(storagePath), false);
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220 // XXX no content when no file? or HgDataFile.exists() to detect that?
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221 if (content == null) {
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222 return new HgDataFile(this, path);
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223 }
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224 return new HgDataFile(this, path, content);
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225 }
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226
142
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227 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/
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diff changeset
228 public PathRewrite getToRepoPathHelper() {
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diff changeset
229 return normalizePath;
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230 }
235
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231
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232 @Experimental(reason="return type and possible values (presently null, perhaps Nodeid.NULL) may get changed")
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233 public Pair<Nodeid,Nodeid> getWorkingCopyParents() {
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234 Nodeid[] p = loadDirstate().parents();
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235 return new Pair<Nodeid,Nodeid>(NULL == p[0] ? null : p[0], NULL == p[1] ? null : p[1]);
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diff changeset
236 }
2
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237
237
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diff changeset
238 /**
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239 * @return location where user files (shall) reside
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diff changeset
240 */
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diff changeset
241 public File getWorkingDir() {
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diff changeset
242 return workingDir;
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243 }
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244
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245 // shall be of use only for internal classes
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246 /*package-local*/ File getRepositoryRoot() {
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247 return repoDir;
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248 }
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249
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250 // 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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251 /*package-local*/ final HgDirstate loadDirstate() {
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252 return new HgDirstate(getDataAccess(), new File(repoDir, "dirstate"));
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253 }
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254
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255 // package-local, see comment for loadDirstate
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256 /*package-local*/ final HgIgnore getIgnore() {
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257 // TODO read config for additional locations
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258 if (ignore == null) {
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259 ignore = new HgIgnore();
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260 try {
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261 File ignoreFile = new File(repoDir.getParentFile(), ".hgignore");
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262 ignore.read(ignoreFile);
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263 } catch (IOException ex) {
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264 ex.printStackTrace(); // log warn
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265 }
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266 }
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267 return ignore;
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268 }
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269
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270 /*package-local*/ DataAccessProvider getDataAccess() {
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271 return dataAccess;
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272 }
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273
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274 /**
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275 * Perhaps, should be separate interface, like ContentLookup
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276 * path - repository storage path (i.e. one usually with .i or .d)
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277 */
202
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278 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) {
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279 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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280 RevlogStream cached = ref == null ? null : ref.get();
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281 if (cached != null) {
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282 return cached;
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283 }
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284 File f = new File(repoDir, path.toString());
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285 if (f.exists()) {
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286 RevlogStream s = new RevlogStream(dataAccess, f);
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287 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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288 return s;
202
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289 } else {
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290 if (shallFakeNonExistent) {
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291 try {
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292 File fake = File.createTempFile(f.getName(), null);
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293 fake.deleteOnExit();
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294 return new RevlogStream(dataAccess, fake);
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295 } catch (IOException ex) {
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296 ex.printStackTrace(); // FIXME report in debug
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297 }
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298 }
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299 }
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300 return null; // XXX empty stream instead?
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301 }
114
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302
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303 // can't expose internal class, otherwise seems reasonable to have it in API
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304 /*package-local*/ ConfigFile getConfigFile() {
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305 if (configFile == null) {
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306 configFile = impl.newConfigFile();
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307 configFile.addLocation(new File(System.getProperty("user.home"), ".hgrc"));
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308 // last one, overrides anything else
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309 // <repo>/.hg/hgrc
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310 configFile.addLocation(new File(getRepositoryRoot(), "hgrc"));
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311 }
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312 return configFile;
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313 }
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314
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315 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) {
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316 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo));
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317 }
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318
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319 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) {
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320 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo));
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321 }
237
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322
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323 /*package-local*/ File getFile(HgDataFile dataFile) {
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324 return new File(getWorkingDir(), dataFile.getPath().toString());
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325 }
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326
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327 private List<Filter> instantiateFilters(Path p, Filter.Options opts) {
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328 List<Filter.Factory> factories = impl.getFilters(this, getConfigFile());
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329 if (factories.isEmpty()) {
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330 return Collections.emptyList();
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331 }
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332 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size());
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333 for (Filter.Factory ff : factories) {
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334 Filter f = ff.create(p, opts);
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335 if (f != null) {
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336 rv.add(f);
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337 }
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338 }
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339 return rv;
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340 }
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341
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342 private void parseRequires() {
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343 new RequiresFile().parse(impl, new File(repoDir, "requires"));
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344 }
114
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345
0
dbd663faec1f Basic changelog parsing
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346 }