Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 78:c25c5c348d1b

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Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 25 Jan 2011 02:13:53 +0100
parents c677e1593919
children c2ce1cfaeb9e
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@svnkit.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.HashMap;
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24 import org.tmatesoft.hg.core.Path;
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25 import org.tmatesoft.hg.internal.DataAccessProvider;
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26 import org.tmatesoft.hg.internal.RequiresFile;
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27 import org.tmatesoft.hg.internal.RevlogStream;
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28 import org.tmatesoft.hg.util.FileWalker;
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29 import org.tmatesoft.hg.util.PathRewrite;
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33 /**
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34 * Shall be as state-less as possible, all the caching happens outside the repo, in commands/walkers
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35 *
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36 * @author Artem Tikhomirov
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37 * @author TMate Software Ltd.
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38 */
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39 public final class HgRepository {
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41 public static final int TIP = -1;
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42 public static final int BAD_REVISION = Integer.MIN_VALUE;
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43 public static final int WORKING_COPY = -2;
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44
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45 // temp aux marker method
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46 public static IllegalStateException notImplemented() {
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47 return new IllegalStateException("Not implemented");
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48 }
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49
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50 private final File repoDir; // .hg folder
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51 private final String repoLocation;
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52 private final DataAccessProvider dataAccess;
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53 private final PathRewrite normalizePath = new PathRewrite() {
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54
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55 public String rewrite(String path) {
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56 // TODO handle . and .. (although unlikely to face them from GUI client)
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57 path = path.replace('\\', '/').replace("//", "/");
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58 if (path.startsWith("/")) {
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59 path = path.substring(1);
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60 }
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61 return path;
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62 }
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63 };
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64 private final PathRewrite dataPathHelper;
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65 private final PathRewrite repoPathHelper;
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66
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67 private Changelog changelog;
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68 private HgManifest manifest;
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69 private HgTags tags;
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70 // XXX perhaps, shall enable caching explicitly
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71 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>();
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73 private final org.tmatesoft.hg.internal.Internals impl = new org.tmatesoft.hg.internal.Internals();
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75 HgRepository(String repositoryPath) {
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76 repoDir = null;
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77 repoLocation = repositoryPath;
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78 dataAccess = null;
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79 dataPathHelper = repoPathHelper = null;
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80 }
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82 HgRepository(File repositoryRoot) throws IOException {
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83 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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84 repoDir = repositoryRoot;
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85 repoLocation = repositoryRoot.getParentFile().getCanonicalPath();
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86 dataAccess = new DataAccessProvider();
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87 parseRequires();
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88 dataPathHelper = impl.buildDataFilesHelper();
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89 repoPathHelper = impl.buildRepositoryFilesHelper();
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90 }
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92
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93 public String getLocation() {
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94 return repoLocation;
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95 }
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97 public boolean isInvalid() {
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98 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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99 }
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100
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101 public Changelog getChangelog() {
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102 if (this.changelog == null) {
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103 String storagePath = repoPathHelper.rewrite("00changelog.i");
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104 RevlogStream content = resolve(Path.create(storagePath));
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105 this.changelog = new Changelog(this, content);
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106 }
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107 return this.changelog;
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108 }
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109
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110 public HgManifest getManifest() {
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111 if (this.manifest == null) {
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112 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")));
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113 this.manifest = new HgManifest(this, content);
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114 }
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115 return this.manifest;
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116 }
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118 public final HgTags getTags() {
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119 if (tags == null) {
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120 tags = new HgTags();
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121 }
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122 return tags;
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123 }
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124
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125 public HgDataFile getFileNode(String path) {
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126 String nPath = normalizePath.rewrite(path);
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127 String storagePath = dataPathHelper.rewrite(nPath);
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128 RevlogStream content = resolve(Path.create(storagePath));
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129 return new HgDataFile(this, Path.create(nPath), content);
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130 }
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131
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132 public HgDataFile getFileNode(Path path) {
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133 String storagePath = dataPathHelper.rewrite(path.toString());
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134 RevlogStream content = resolve(Path.create(storagePath));
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135 // XXX no content when no file? or HgDataFile.exists() to detect that? How about files that were removed in previous releases?
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136 return new HgDataFile(this, path, content);
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137 }
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138
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139 public PathRewrite getPathHelper() { // Really need to be public?
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140 return normalizePath;
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141 }
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142
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143 /*package-local*/ File getRepositoryRoot() {
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144 return repoDir;
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145 }
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146
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147 // 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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148 /*package-local*/ final HgDirstate loadDirstate() {
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149 return new HgDirstate(getDataAccess(), new File(repoDir, "dirstate"));
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150 }
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151
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152 // package-local, see comment for loadDirstate
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153 /*package-local*/ final HgIgnore loadIgnore() {
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154 return new HgIgnore(this);
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155 }
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156
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157 /*package-local*/ DataAccessProvider getDataAccess() {
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158 return dataAccess;
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159 }
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160
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161 // FIXME not sure repository shall create walkers
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162 /*package-local*/ FileWalker createWorkingDirWalker() {
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163 return new FileWalker(repoDir.getParentFile());
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164 }
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165
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166 /**
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167 * Perhaps, should be separate interface, like ContentLookup
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168 * path - repository storage path (i.e. one usually with .i or .d)
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169 */
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170 /*package-local*/ RevlogStream resolve(Path path) {
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171 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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172 RevlogStream cached = ref == null ? null : ref.get();
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173 if (cached != null) {
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174 return cached;
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175 }
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176 File f = new File(repoDir, path.toString());
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177 if (f.exists()) {
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178 RevlogStream s = new RevlogStream(dataAccess, f);
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179 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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180 return s;
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181 }
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182 return null; // XXX empty stream instead?
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183 }
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184
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185 private void parseRequires() {
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186 new RequiresFile().parse(impl, new File(repoDir, "requires"));
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187 }
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188 }