Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 425:48f993aa2f41

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FIXMEs: exceptions, javadoc
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 28 Mar 2012 18:39:29 +0200
parents 9c9c442b5f2e
children d280759c2a3f
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1 /*
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2 * Copyright (c) 2010-2012 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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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.io.StringReader;
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22 import java.lang.ref.SoftReference;
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23 import java.util.ArrayList;
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24 import java.util.Collections;
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25 import java.util.HashMap;
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26 import java.util.List;
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28 import org.tmatesoft.hg.core.Nodeid;
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29 import org.tmatesoft.hg.core.SessionContext;
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30 import org.tmatesoft.hg.internal.ByteArrayChannel;
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31 import org.tmatesoft.hg.internal.ConfigFile;
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32 import org.tmatesoft.hg.internal.DataAccessProvider;
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33 import org.tmatesoft.hg.internal.Experimental;
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34 import org.tmatesoft.hg.internal.Filter;
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35 import org.tmatesoft.hg.internal.Internals;
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36 import org.tmatesoft.hg.internal.RevlogStream;
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37 import org.tmatesoft.hg.internal.SubrepoManager;
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38 import org.tmatesoft.hg.util.CancelledException;
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39 import org.tmatesoft.hg.util.Pair;
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40 import org.tmatesoft.hg.util.Path;
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41 import org.tmatesoft.hg.util.PathPool;
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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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a3576694a4d1 Repository detection from local/specified directory
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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 // IMPORTANT: if new constants added, consider fixing HgInternals#wrongRevisionIndex and HgInvalidRevisionException#getMessage
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57 /**
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58 * Revision index constant to indicate most recent revision
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59 */
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60 public static final int TIP = -3; // XXX TIP_REVISION?
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62 /**
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63 * Revision index constant to indicate invalid revision index value.
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64 * Primary use is default/uninitialized values where user input is expected and as return value where
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65 * an exception (e.g. {@link HgInvalidRevisionException}) is not desired
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66 */
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67 public static final int BAD_REVISION = Integer.MIN_VALUE; // XXX INVALID_REVISION?
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69 /**
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70 * Revision index constant to indicate working copy
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71 */
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72 public static final int WORKING_COPY = -2; // XXX WORKING_COPY_REVISION?
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74 /**
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75 * Constant ({@value #NO_REVISION}) to indicate revision absence or a fictitious revision of an empty repository.
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76 *
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77 * <p>Revision absence is vital e.g. for missing parent from {@link HgChangelog#parents(int, int[], byte[], byte[])} call and
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78 * to report cases when changeset records no corresponding manifest
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79 * revision {@link HgManifest#walk(int, int, org.tmatesoft.hg.repo.HgManifest.Inspector)}.
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80 *
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81 * <p> Use as imaginary revision/empty repository is handy as an argument (contrary to {@link #BAD_REVISION})
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82 * e.g in a status operation to visit changes from the very beginning of a repository.
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83 */
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84 public static final int NO_REVISION = -1;
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85
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86 /**
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87 * Name of the primary branch, "default".
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88 */
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89 public static final String DEFAULT_BRANCH_NAME = "default";
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91 // temp aux marker method
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92 public static IllegalStateException notImplemented() {
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93 return new IllegalStateException("Not implemented");
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94 }
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96 private final File repoDir; // .hg folder
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97 private final File workingDir; // .hg/../
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98 private final String repoLocation;
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99 private final DataAccessProvider dataAccess;
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100 private final PathRewrite normalizePath;
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101 private final PathRewrite dataPathHelper;
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102 private final PathRewrite repoPathHelper;
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103 private final SessionContext sessionContext;
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104
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105 private HgChangelog changelog;
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106 private HgManifest manifest;
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107 private HgTags tags;
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108 private HgBranches branches;
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109 private HgMergeState mergeState;
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110 private SubrepoManager subRepos;
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112 // XXX perhaps, shall enable caching explicitly
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113 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>();
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115 private final org.tmatesoft.hg.internal.Internals impl;
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116 private HgIgnore ignore;
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117 private HgRepoConfig repoConfig;
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118
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119 HgRepository(String repositoryPath) {
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120 repoDir = null;
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121 workingDir = null;
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122 repoLocation = repositoryPath;
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123 dataAccess = null;
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124 dataPathHelper = repoPathHelper = null;
142
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125 normalizePath = null;
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126 sessionContext = null;
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127 impl = null;
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128 }
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129
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130 /**
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131 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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132 */
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133 HgRepository(SessionContext ctx, String repositoryPath, File repositoryRoot) throws HgRuntimeException {
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134 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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135 assert repositoryPath != null;
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136 assert repositoryRoot != null;
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137 assert ctx != null;
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138 repoDir = repositoryRoot;
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139 workingDir = repoDir.getParentFile();
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140 if (workingDir == null) {
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141 throw new IllegalArgumentException(repoDir.toString());
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142 }
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143 impl = new org.tmatesoft.hg.internal.Internals(ctx);
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144 repoLocation = repositoryPath;
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145 sessionContext = ctx;
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146 dataAccess = new DataAccessProvider(ctx);
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147 impl.parseRequires(this, new File(repoDir, "requires"));
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148 normalizePath = impl.buildNormalizePathRewrite();
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149 dataPathHelper = impl.buildDataFilesHelper();
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150 repoPathHelper = impl.buildRepositoryFilesHelper();
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151 }
0
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152
145
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153 @Override
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154 public String toString() {
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155 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]";
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156 }
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157
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158 public String getLocation() {
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159 return repoLocation;
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160 }
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161
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162 public boolean isInvalid() {
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163 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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164 }
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165
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166 public HgChangelog getChangelog() {
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167 if (changelog == null) {
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168 CharSequence storagePath = repoPathHelper.rewrite("00changelog.i");
202
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169 RevlogStream content = resolve(Path.create(storagePath), true);
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170 changelog = new HgChangelog(this, content);
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171 }
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172 return changelog;
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173 }
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174
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175 public HgManifest getManifest() {
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176 if (manifest == null) {
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177 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true);
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178 manifest = new HgManifest(this, content, impl.buildFileNameEncodingHelper());
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179 }
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180 return manifest;
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181 }
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182
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183 public HgTags getTags() throws HgInvalidControlFileException {
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184 if (tags == null) {
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185 tags = new HgTags(this);
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186 HgDataFile hgTags = getFileNode(".hgtags");
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187 if (hgTags.exists()) {
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188 for (int i = 0; i <= hgTags.getLastRevision(); i++) { // TODO post-1.0 in fact, would be handy to have walk(start,end)
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189 // method for data files as well, though it looks odd.
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190 try {
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191 ByteArrayChannel sink = new ByteArrayChannel();
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192 hgTags.content(i, sink);
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193 final String content = new String(sink.toArray(), "UTF8");
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194 tags.readGlobal(new StringReader(content));
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195 } catch (CancelledException ex) {
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196 // IGNORE, can't happen, we did not configure cancellation
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197 getContext().getLog().debug(getClass(), ex, null);
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198 } catch (IOException ex) {
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199 // UnsupportedEncodingException can't happen (UTF8)
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200 // only from readGlobal. Need to reconsider exceptions thrown from there:
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201 // BufferedReader wraps String and unlikely to throw IOException, perhaps, log is enough?
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202 getContext().getLog().error(getClass(), ex, null);
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203 // XXX need to decide what to do this. failure to read single revision shall not break complete cycle
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204 }
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205 }
318
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206 }
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207 File file2read = null;
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208 try {
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209 file2read = new File(getWorkingDir(), ".hgtags");
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210 tags.readGlobal(file2read); // XXX replace with HgDataFile.workingCopy
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211 file2read = new File(repoDir, "localtags");
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212 tags.readLocal(file2read);
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213 } catch (IOException ex) {
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214 getContext().getLog().error(getClass(), ex, null);
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215 throw new HgInvalidControlFileException("Failed to read tags", ex, file2read);
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216 }
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217 }
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218 return tags;
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219 }
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220
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221 public HgBranches getBranches() throws HgInvalidControlFileException {
220
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222 if (branches == null) {
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223 branches = new HgBranches(this);
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224 branches.collect(ProgressSupport.Factory.get(null));
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225 }
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226 return branches;
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227 }
231
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228
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229 @Experimental(reason="Perhaps, shall not cache instance, and provide loadMergeState as it may change often")
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230 public HgMergeState getMergeState() {
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231 if (mergeState == null) {
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232 mergeState = new HgMergeState(this);
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233 }
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234 return mergeState;
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235 }
220
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236
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237 public HgDataFile getFileNode(String path) {
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238 CharSequence nPath = normalizePath.rewrite(path);
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239 CharSequence storagePath = dataPathHelper.rewrite(nPath);
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240 RevlogStream content = resolve(Path.create(storagePath), false);
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241 Path p = Path.create(nPath);
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242 if (content == null) {
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243 return new HgDataFile(this, p);
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244 }
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245 return new HgDataFile(this, p, content);
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246 }
1
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247
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248 public HgDataFile getFileNode(Path path) {
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249 CharSequence storagePath = dataPathHelper.rewrite(path.toString());
202
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250 RevlogStream content = resolve(Path.create(storagePath), false);
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251 // XXX no content when no file? or HgDataFile.exists() to detect that?
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252 if (content == null) {
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253 return new HgDataFile(this, path);
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254 }
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255 return new HgDataFile(this, path, content);
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256 }
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257
142
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258 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/
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259 public PathRewrite getToRepoPathHelper() {
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260 return normalizePath;
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261 }
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262
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263 /**
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264 * @return pair of values, {@link Pair#first()} and {@link Pair#second()} are respective parents, never <code>null</code>.
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265 * @throws HgInvalidControlFileException if attempt to read information about working copy parents from dirstate failed
284
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266 */
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267 public Pair<Nodeid,Nodeid> getWorkingCopyParents() throws HgInvalidControlFileException {
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268 return HgDirstate.readParents(this, new File(repoDir, "dirstate"));
235
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269 }
252
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270
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271 /**
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272 * @return name of the branch associated with working directory, never <code>null</code>.
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273 * @throws HgInvalidControlFileException if attempt to read branch name failed.
252
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274 */
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275 public String getWorkingCopyBranchName() throws HgInvalidControlFileException {
284
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276 return HgDirstate.readBranch(this);
252
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277 }
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278
237
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279 /**
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280 * @return location where user files (shall) reside
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281 */
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282 public File getWorkingDir() {
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283 return workingDir;
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284 }
239
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285
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286 /**
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287 * Provides access to sub-repositories defined in this repository. Enumerated sub-repositories are those directly
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288 * known, not recursive collection of all nested sub-repositories.
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289 * @return list of all known sub-repositories in this repository, or empty list if none found.
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290 */
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291 public List<HgSubrepoLocation> getSubrepositories() throws HgInvalidControlFileException {
239
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292 if (subRepos == null) {
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293 subRepos = new SubrepoManager(this);
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294 subRepos.read();
239
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295 }
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296 return subRepos.all();
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297 }
237
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298
331
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299
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300 public HgRepoConfig getConfiguration() /* XXX throws HgInvalidControlFileException? Description of the exception suggests it is only for files under ./hg/*/ {
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301 if (repoConfig == null) {
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302 try {
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303 ConfigFile configFile = impl.readConfiguration(this, getRepositoryRoot());
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304 repoConfig = new HgRepoConfig(configFile);
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305 } catch (IOException ex) {
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306 String m = "Errors while reading user configuration file";
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307 getContext().getLog().warn(getClass(), ex, m);
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308 return new HgRepoConfig(new ConfigFile()); // empty config, do not cache, allow to try once again
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309 //throw new HgInvalidControlFileException(m, ex, null);
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310 }
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311 }
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312 return repoConfig;
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313 }
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314
237
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315 // shall be of use only for internal classes
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316 /*package-local*/ File getRepositoryRoot() {
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317 return repoDir;
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318 }
337
f377f833b780 Issue 17: temporary code to nail down the problem
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319
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320 /*package-local, debug*/String getStoragePath(HgDataFile df) {
418
528b6780a8bd A bit of FIXME cleanup (mostly degraded to TODO post 1.0), comments and javadoc
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321 // may come handy for debug
337
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322 return dataPathHelper.rewrite(df.getPath().toString()).toString();
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323 }
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324
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325 // 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)
280
35125450c804 Erroneous and slow status for working copies based on non-tip revision
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326 // XXX consider passing Path pool or factory to produce (shared) Path instead of Strings
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327 /*package-local*/ final HgDirstate loadDirstate(PathPool pathPool) throws HgInvalidControlFileException {
292
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328 PathRewrite canonicalPath = null;
388
b015f3918120 Work on FIXME: correct HgDataFile#workingCopy with tests; BasicSessionContext with property override; platform-specific options to internals
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329 if (!impl.isCaseSensitiveFileSystem()) {
292
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330 canonicalPath = new PathRewrite() {
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331
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332 public CharSequence rewrite(CharSequence path) {
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333 return path.toString().toLowerCase();
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334 }
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335 };
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336 }
348
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337 HgDirstate ds = new HgDirstate(this, new File(repoDir, "dirstate"), pathPool, canonicalPath);
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338 ds.read(impl.buildFileNameEncodingHelper());
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339 return ds;
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340 }
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341
289
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342 /**
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343 * Access to configured set of ignored files.
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344 * @see HgIgnore#isIgnored(Path)
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345 */
335
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346 public HgIgnore getIgnore() /*throws HgInvalidControlFileException */{
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347 // TODO read config for additional locations
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348 if (ignore == null) {
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349 ignore = new HgIgnore(getToRepoPathHelper());
335
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350 File ignoreFile = new File(getWorkingDir(), ".hgignore");
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351 try {
335
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352 final List<String> errors = ignore.read(ignoreFile);
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353 if (errors != null) {
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354 getContext().getLog().warn(getClass(), "Syntax errors parsing .hgignore:\n%s", Internals.join(errors, ",\n"));
335
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355 }
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356 } catch (IOException ex) {
335
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357 final String m = "Error reading .hgignore file";
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358 getContext().getLog().warn(getClass(), ex, m);
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359 // throw new HgInvalidControlFileException(m, ex, ignoreFile);
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360 }
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361 }
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362 return ignore;
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363 }
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364
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365 /*package-local*/ DataAccessProvider getDataAccess() {
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366 return dataAccess;
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367 }
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368
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369 /**
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370 * Perhaps, should be separate interface, like ContentLookup
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371 * path - repository storage path (i.e. one usually with .i or .d)
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372 */
202
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373 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) {
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374 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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375 RevlogStream cached = ref == null ? null : ref.get();
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376 if (cached != null) {
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377 return cached;
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378 }
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379 File f = new File(repoDir, path.toString());
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380 if (f.exists()) {
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381 RevlogStream s = new RevlogStream(dataAccess, f);
388
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382 if (impl.shallCacheRevlogs()) {
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383 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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384 }
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385 return s;
202
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386 } else {
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387 if (shallFakeNonExistent) {
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388 try {
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389 File fake = File.createTempFile(f.getName(), null);
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390 fake.deleteOnExit();
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391 return new RevlogStream(dataAccess, fake);
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392 } catch (IOException ex) {
295
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393 getContext().getLog().info(getClass(), ex, null);
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394 }
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395 }
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396 }
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397 return null; // XXX empty stream instead?
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398 }
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399
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400 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) {
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401 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo));
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402 }
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403
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404 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) {
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405 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo));
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406 }
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407
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408 /*package-local*/ File getFile(HgDataFile dataFile) {
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409 return new File(getWorkingDir(), dataFile.getPath().toString());
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410 }
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411
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412 /*package-local*/ SessionContext getContext() {
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413 return sessionContext;
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414 }
412
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415
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416 /*package-local*/ Internals getImplHelper() {
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417 return impl;
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418 }
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419
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420 private List<Filter> instantiateFilters(Path p, Filter.Options opts) {
331
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421 List<Filter.Factory> factories = impl.getFilters(this);
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422 if (factories.isEmpty()) {
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423 return Collections.emptyList();
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424 }
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425 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size());
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426 for (Filter.Factory ff : factories) {
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427 Filter f = ff.create(p, opts);
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428 if (f != null) {
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429 rv.add(f);
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430 }
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431 }
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432 return rv;
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433 }
0
dbd663faec1f Basic changelog parsing
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434 }