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annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 418:528b6780a8bd

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A bit of FIXME cleanup (mostly degraded to TODO post 1.0), comments and javadoc
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 22 Mar 2012 21:02:20 +0100
parents bb278ccf9866
children fdd7d756dea0
rev   line source
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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.HgException;
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29 import org.tmatesoft.hg.core.HgInvalidControlFileException;
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30 import org.tmatesoft.hg.core.HgInvalidRevisionException;
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31 import org.tmatesoft.hg.core.Nodeid;
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32 import org.tmatesoft.hg.core.SessionContext;
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33 import org.tmatesoft.hg.internal.ByteArrayChannel;
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34 import org.tmatesoft.hg.internal.ConfigFile;
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35 import org.tmatesoft.hg.internal.DataAccessProvider;
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36 import org.tmatesoft.hg.internal.Experimental;
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37 import org.tmatesoft.hg.internal.Filter;
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38 import org.tmatesoft.hg.internal.Internals;
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39 import org.tmatesoft.hg.internal.RevlogStream;
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40 import org.tmatesoft.hg.internal.SubrepoManager;
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41 import org.tmatesoft.hg.util.CancelledException;
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42 import org.tmatesoft.hg.util.Pair;
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43 import org.tmatesoft.hg.util.Path;
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44 import org.tmatesoft.hg.util.PathPool;
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45 import org.tmatesoft.hg.util.PathRewrite;
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46 import org.tmatesoft.hg.util.ProgressSupport;
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50 /**
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51 * Shall be as state-less as possible, all the caching happens outside the repo, in commands/walkers
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52 *
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53 * @author Artem Tikhomirov
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54 * @author TMate Software Ltd.
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55 */
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56 public final class HgRepository {
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58 // IMPORTANT: if new constants added, consider fixing HgInternals#wrongRevisionIndex and HgInvalidRevisionException#getMessage
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60 /**
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61 * Revision index constant to indicate most recent revision
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62 */
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63 public static final int TIP = -3; // XXX TIP_REVISION?
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65 /**
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66 * Revision index constant to indicate invalid revision index value.
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67 * Primary use is default/uninitialized values where user input is expected and as return value where
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68 * an exception (e.g. {@link HgInvalidRevisionException}) is not desired
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69 */
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70 public static final int BAD_REVISION = Integer.MIN_VALUE; // XXX INVALID_REVISION?
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72 /**
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73 * Revision index constant to indicate working copy
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74 */
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75 public static final int WORKING_COPY = -2; // XXX WORKING_COPY_REVISION?
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77 /**
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78 * Constant ({@value #NO_REVISION}) to indicate revision absence (e.g. missing parent in from {@link HgChangelog#parents(int, int[], byte[], byte[])} call)
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79 * or a fictitious revision of an empty repository, to use as an argument (contrary to {@link #BAD_REVISION})
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80 * e.g in a status operation to visit changes from the very beginning of a repository.
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81 */
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82 public static final int NO_REVISION = -1;
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84 /**
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85 * Name of the primary branch, "default".
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86 */
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87 public static final String DEFAULT_BRANCH_NAME = "default";
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88
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89 // temp aux marker method
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90 public static IllegalStateException notImplemented() {
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91 return new IllegalStateException("Not implemented");
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92 }
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94 private final File repoDir; // .hg folder
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95 private final File workingDir; // .hg/../
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96 private final String repoLocation;
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97 private final DataAccessProvider dataAccess;
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98 private final PathRewrite normalizePath;
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99 private final PathRewrite dataPathHelper;
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100 private final PathRewrite repoPathHelper;
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101 private final SessionContext sessionContext;
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103 private HgChangelog changelog;
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104 private HgManifest manifest;
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105 private HgTags tags;
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106 private HgBranches branches;
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107 private HgMergeState mergeState;
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108 private SubrepoManager subRepos;
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110 // XXX perhaps, shall enable caching explicitly
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111 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>();
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112
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113 private final org.tmatesoft.hg.internal.Internals impl;
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114 private HgIgnore ignore;
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115 private HgRepoConfig repoConfig;
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117 HgRepository(String repositoryPath) {
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118 repoDir = null;
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119 workingDir = null;
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120 repoLocation = repositoryPath;
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121 dataAccess = null;
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122 dataPathHelper = repoPathHelper = null;
142
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123 normalizePath = null;
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124 sessionContext = null;
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125 impl = null;
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126 }
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127
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128 HgRepository(SessionContext ctx, String repositoryPath, File repositoryRoot) {
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129 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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130 assert repositoryPath != null;
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131 assert repositoryRoot != null;
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132 assert ctx != null;
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133 repoDir = repositoryRoot;
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134 workingDir = repoDir.getParentFile();
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135 if (workingDir == null) {
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136 throw new IllegalArgumentException(repoDir.toString());
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137 }
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138 impl = new org.tmatesoft.hg.internal.Internals(ctx);
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139 repoLocation = repositoryPath;
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140 sessionContext = ctx;
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141 dataAccess = new DataAccessProvider(ctx);
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142 impl.parseRequires(this, new File(repoDir, "requires"));
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143 normalizePath = impl.buildNormalizePathRewrite();
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144 dataPathHelper = impl.buildDataFilesHelper();
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145 repoPathHelper = impl.buildRepositoryFilesHelper();
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146 }
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147
145
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148 @Override
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149 public String toString() {
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150 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]";
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151 }
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152
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153 public String getLocation() {
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154 return repoLocation;
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155 }
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156
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157 public boolean isInvalid() {
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158 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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159 }
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160
97
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161 public HgChangelog getChangelog() {
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162 if (changelog == null) {
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163 CharSequence storagePath = repoPathHelper.rewrite("00changelog.i");
202
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164 RevlogStream content = resolve(Path.create(storagePath), true);
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165 changelog = new HgChangelog(this, content);
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166 }
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167 return changelog;
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168 }
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169
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170 public HgManifest getManifest() {
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171 if (manifest == null) {
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172 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true);
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173 manifest = new HgManifest(this, content, impl.buildFileNameEncodingHelper());
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174 }
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175 return manifest;
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176 }
50
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177
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178 public HgTags getTags() throws HgInvalidControlFileException {
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179 if (tags == null) {
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180 tags = new HgTags(this);
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181 HgDataFile hgTags = getFileNode(".hgtags");
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182 if (hgTags.exists()) {
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183 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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184 // method for data files as well, though it looks odd.
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185 try {
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186 ByteArrayChannel sink = new ByteArrayChannel();
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187 hgTags.content(i, sink);
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188 final String content = new String(sink.toArray(), "UTF8");
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189 tags.readGlobal(new StringReader(content));
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190 } catch (CancelledException ex) {
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191 // IGNORE, can't happen, we did not configure cancellation
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192 getContext().getLog().debug(getClass(), ex, null);
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193 } catch (HgException ex) {
318
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194 getContext().getLog().error(getClass(), ex, null);
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195 // FIXME need to react
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196 } catch (IOException ex) {
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197 // UnsupportedEncodingException can't happen (UTF8)
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198 // only from readGlobal. Need to reconsider exceptions thrown from there:
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199 // BufferedReader wraps String and unlikely to throw IOException, perhaps, log is enough?
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200 getContext().getLog().error(getClass(), ex, null);
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201 // XXX need to decide what to do this. failure to read single revision shall not break complete cycle
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202 }
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203 }
318
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204 }
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205 File file2read = null;
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206 try {
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207 file2read = new File(getWorkingDir(), ".hgtags");
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208 tags.readGlobal(file2read); // XXX replace with HgDataFile.workingCopy
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209 file2read = new File(repoDir, "localtags");
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210 tags.readLocal(file2read);
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211 } catch (IOException ex) {
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212 getContext().getLog().error(getClass(), ex, null);
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213 throw new HgInvalidControlFileException("Failed to read tags", ex, file2read);
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214 }
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215 }
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216 return tags;
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217 }
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218
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219 public HgBranches getBranches() throws HgInvalidControlFileException {
220
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220 if (branches == null) {
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221 branches = new HgBranches(this);
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222 branches.collect(ProgressSupport.Factory.get(null));
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223 }
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224 return branches;
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225 }
231
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226
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227 @Experimental(reason="Perhaps, shall not cache instance, and provide loadMergeState as it may change often")
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228 public HgMergeState getMergeState() {
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229 if (mergeState == null) {
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230 mergeState = new HgMergeState(this);
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231 }
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232 return mergeState;
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233 }
220
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234
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235 public HgDataFile getFileNode(String path) {
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236 CharSequence nPath = normalizePath.rewrite(path);
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237 CharSequence storagePath = dataPathHelper.rewrite(nPath);
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238 RevlogStream content = resolve(Path.create(storagePath), false);
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239 Path p = Path.create(nPath);
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240 if (content == null) {
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241 return new HgDataFile(this, p);
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242 }
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243 return new HgDataFile(this, p, content);
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244 }
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245
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246 public HgDataFile getFileNode(Path path) {
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247 CharSequence storagePath = dataPathHelper.rewrite(path.toString());
202
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248 RevlogStream content = resolve(Path.create(storagePath), false);
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249 // XXX no content when no file? or HgDataFile.exists() to detect that?
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250 if (content == null) {
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251 return new HgDataFile(this, path);
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252 }
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253 return new HgDataFile(this, path, content);
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254 }
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255
142
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256 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/
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257 public PathRewrite getToRepoPathHelper() {
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258 return normalizePath;
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259 }
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260
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261 /**
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262 * @return pair of values, {@link Pair#first()} and {@link Pair#second()} are respective parents, never <code>null</code>.
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263 * @throws HgInvalidControlFileException if attempt to read information about working copy parents from dirstate failed
284
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264 */
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265 public Pair<Nodeid,Nodeid> getWorkingCopyParents() throws HgInvalidControlFileException {
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266 return HgDirstate.readParents(this, new File(repoDir, "dirstate"));
235
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267 }
252
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268
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269 /**
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270 * @return name of the branch associated with working directory, never <code>null</code>.
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271 * @throws HgInvalidControlFileException if attempt to read branch name failed.
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272 */
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273 public String getWorkingCopyBranchName() throws HgInvalidControlFileException {
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274 return HgDirstate.readBranch(this);
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275 }
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276
237
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277 /**
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278 * @return location where user files (shall) reside
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279 */
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280 public File getWorkingDir() {
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281 return workingDir;
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282 }
239
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283
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284 /**
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285 * Provides access to sub-repositories defined in this repository. Enumerated sub-repositories are those directly
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286 * known, not recursive collection of all nested sub-repositories.
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287 * @return list of all known sub-repositories in this repository, or empty list if none found.
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288 */
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289 public List<HgSubrepoLocation> getSubrepositories() throws HgInvalidControlFileException {
239
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290 if (subRepos == null) {
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291 subRepos = new SubrepoManager(this);
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292 subRepos.read();
239
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293 }
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294 return subRepos.all();
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295 }
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296
331
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297
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298 public HgRepoConfig getConfiguration() /* XXX throws HgInvalidControlFileException? Description of the exception suggests it is only for files under ./hg/*/ {
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299 if (repoConfig == null) {
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300 try {
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301 ConfigFile configFile = impl.readConfiguration(this, getRepositoryRoot());
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302 repoConfig = new HgRepoConfig(configFile);
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303 } catch (IOException ex) {
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304 String m = "Errors while reading user configuration file";
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305 getContext().getLog().warn(getClass(), ex, m);
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306 return new HgRepoConfig(new ConfigFile()); // empty config, do not cache, allow to try once again
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307 //throw new HgInvalidControlFileException(m, ex, null);
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308 }
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309 }
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310 return repoConfig;
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311 }
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312
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313 // shall be of use only for internal classes
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314 /*package-local*/ File getRepositoryRoot() {
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315 return repoDir;
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316 }
337
f377f833b780 Issue 17: temporary code to nail down the problem
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317
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318 /*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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319 // may come handy for debug
337
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320 return dataPathHelper.rewrite(df.getPath().toString()).toString();
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321 }
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322
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323 // 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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324 // XXX consider passing Path pool or factory to produce (shared) Path instead of Strings
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325 /*package-local*/ final HgDirstate loadDirstate(PathPool pathPool) throws HgInvalidControlFileException {
292
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326 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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327 if (!impl.isCaseSensitiveFileSystem()) {
292
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328 canonicalPath = new PathRewrite() {
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329
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330 public CharSequence rewrite(CharSequence path) {
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331 return path.toString().toLowerCase();
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332 }
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333 };
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334 }
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335 HgDirstate ds = new HgDirstate(this, new File(repoDir, "dirstate"), pathPool, canonicalPath);
412
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336 ds.read(impl.buildFileNameEncodingHelper());
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337 return ds;
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338 }
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339
289
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340 /**
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341 * Access to configured set of ignored files.
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342 * @see HgIgnore#isIgnored(Path)
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343 */
335
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344 public HgIgnore getIgnore() /*throws HgInvalidControlFileException */{
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345 // TODO read config for additional locations
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346 if (ignore == null) {
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347 ignore = new HgIgnore(getToRepoPathHelper());
335
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348 File ignoreFile = new File(getWorkingDir(), ".hgignore");
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349 try {
335
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350 final List<String> errors = ignore.read(ignoreFile);
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351 if (errors != null) {
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352 getContext().getLog().warn(getClass(), "Syntax errors parsing .hgignore:\n%s", Internals.join(errors, ",\n"));
335
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353 }
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354 } catch (IOException ex) {
335
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355 final String m = "Error reading .hgignore file";
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356 getContext().getLog().warn(getClass(), ex, m);
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357 // throw new HgInvalidControlFileException(m, ex, ignoreFile);
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358 }
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359 }
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360 return ignore;
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361 }
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362
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363 /*package-local*/ DataAccessProvider getDataAccess() {
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364 return dataAccess;
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365 }
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366
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367 /**
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368 * Perhaps, should be separate interface, like ContentLookup
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369 * path - repository storage path (i.e. one usually with .i or .d)
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370 */
202
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371 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) {
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372 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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373 RevlogStream cached = ref == null ? null : ref.get();
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374 if (cached != null) {
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375 return cached;
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376 }
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377 File f = new File(repoDir, path.toString());
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378 if (f.exists()) {
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379 RevlogStream s = new RevlogStream(dataAccess, f);
388
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380 if (impl.shallCacheRevlogs()) {
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381 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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382 }
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383 return s;
202
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384 } else {
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385 if (shallFakeNonExistent) {
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386 try {
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387 File fake = File.createTempFile(f.getName(), null);
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388 fake.deleteOnExit();
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389 return new RevlogStream(dataAccess, fake);
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390 } catch (IOException ex) {
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391 getContext().getLog().info(getClass(), ex, null);
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392 }
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393 }
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394 }
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395 return null; // XXX empty stream instead?
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396 }
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397
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398 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) {
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399 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo));
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400 }
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401
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402 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) {
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403 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo));
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404 }
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405
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406 /*package-local*/ File getFile(HgDataFile dataFile) {
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407 return new File(getWorkingDir(), dataFile.getPath().toString());
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408 }
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409
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410 /*package-local*/ SessionContext getContext() {
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411 return sessionContext;
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412 }
412
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413
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414 /*package-local*/ Internals getImplHelper() {
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415 return impl;
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416 }
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417
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418 private List<Filter> instantiateFilters(Path p, Filter.Options opts) {
331
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419 List<Filter.Factory> factories = impl.getFilters(this);
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420 if (factories.isEmpty()) {
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421 return Collections.emptyList();
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422 }
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423 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size());
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424 for (Filter.Factory ff : factories) {
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425 Filter f = ff.create(p, opts);
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426 if (f != null) {
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427 rv.add(f);
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428 }
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429 }
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430 return rv;
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431 }
0
dbd663faec1f Basic changelog parsing
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432 }