Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 444:b3b1db9301a2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Few comments that emerged while working on examples
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 May 2012 20:19:22 +0200
parents 12f668401613
children 909306e412e2
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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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.PathRewrite;
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42 import org.tmatesoft.hg.util.ProgressSupport;
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46 /**
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47 * Shall be as state-less as possible, all the caching happens outside the repo, in commands/walkers
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48 *
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49 * @author Artem Tikhomirov
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50 * @author TMate Software Ltd.
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51 */
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52 public final class HgRepository {
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54 // IMPORTANT: if new constants added, consider fixing HgInternals#wrongRevisionIndex and HgInvalidRevisionException#getMessage
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56 /**
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57 * Revision index constant to indicate most recent revision
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58 */
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59 public static final int TIP = -3; // XXX TIP_REVISION?
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61 /**
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62 * Revision index constant to indicate invalid revision index value.
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63 * Primary use is default/uninitialized values where user input is expected and as return value where
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64 * an exception (e.g. {@link HgInvalidRevisionException}) is not desired
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65 */
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66 public static final int BAD_REVISION = Integer.MIN_VALUE; // XXX INVALID_REVISION?
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68 /**
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69 * Revision index constant to indicate working copy
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70 */
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71 public static final int WORKING_COPY = -2; // XXX WORKING_COPY_REVISION?
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73 /**
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74 * Constant ({@value #NO_REVISION}) to indicate revision absence or a fictitious revision of an empty repository.
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75 *
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76 * <p>Revision absence is vital e.g. for missing parent from {@link HgChangelog#parents(int, int[], byte[], byte[])} call and
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77 * to report cases when changeset records no corresponding manifest
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78 * revision {@link HgManifest#walk(int, int, org.tmatesoft.hg.repo.HgManifest.Inspector)}.
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79 *
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80 * <p> Use as imaginary revision/empty repository is handy as an argument (contrary to {@link #BAD_REVISION})
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81 * e.g in a status operation to visit changes from the very beginning of a repository.
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82 */
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83 public static final int NO_REVISION = -1;
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84
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85 /**
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86 * Name of the primary branch, "default".
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87 */
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88 public static final String DEFAULT_BRANCH_NAME = "default";
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89
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90 // temp aux marker method
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91 public static IllegalStateException notImplemented() {
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92 return new IllegalStateException("Not implemented");
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93 }
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95 private final File repoDir; // .hg folder
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96 private final File workingDir; // .hg/../
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97 private final String repoLocation;
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98 private final DataAccessProvider dataAccess;
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99 private final PathRewrite normalizePath;
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100 private final PathRewrite dataPathHelper;
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101 private final PathRewrite repoPathHelper;
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102 private final SessionContext sessionContext;
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103
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104 private HgChangelog changelog;
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105 private HgManifest manifest;
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106 private HgTags tags;
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107 private HgBranches branches;
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108 private HgMergeState mergeState;
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109 private SubrepoManager subRepos;
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111 // XXX perhaps, shall enable caching explicitly
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112 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>();
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114 private final org.tmatesoft.hg.internal.Internals impl;
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115 private HgIgnore ignore;
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116 private HgRepoConfig repoConfig;
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118 /*
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119 * TODO [post-1.0] move to a better place, e.g. WorkingCopy container that tracks both dirstate and branches
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120 * (and, perhaps, undo, lastcommit and other similar information), and is change listener so that we don't need to
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121 * worry about this cached value become stale
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122 */
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123 private String wcBranch;
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124
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125
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126 HgRepository(String repositoryPath) {
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127 repoDir = null;
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128 workingDir = null;
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129 repoLocation = repositoryPath;
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130 dataAccess = null;
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131 dataPathHelper = repoPathHelper = null;
142
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132 normalizePath = null;
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133 sessionContext = null;
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134 impl = null;
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135 }
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136
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137 /**
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138 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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139 */
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140 HgRepository(SessionContext ctx, String repositoryPath, File repositoryRoot) throws HgRuntimeException {
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141 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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142 assert repositoryPath != null;
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143 assert repositoryRoot != null;
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144 assert ctx != null;
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145 repoDir = repositoryRoot;
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146 workingDir = repoDir.getParentFile();
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147 if (workingDir == null) {
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148 throw new IllegalArgumentException(repoDir.toString());
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149 }
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150 impl = new org.tmatesoft.hg.internal.Internals(ctx);
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151 repoLocation = repositoryPath;
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152 sessionContext = ctx;
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153 dataAccess = new DataAccessProvider(ctx);
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154 impl.parseRequires(this, new File(repoDir, "requires"));
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155 normalizePath = impl.buildNormalizePathRewrite();
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156 dataPathHelper = impl.buildDataFilesHelper();
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157 repoPathHelper = impl.buildRepositoryFilesHelper();
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158 }
0
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159
145
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160 @Override
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161 public String toString() {
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162 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]";
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163 }
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164
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165 public String getLocation() {
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166 return repoLocation;
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167 }
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168
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169 public boolean isInvalid() {
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170 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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171 }
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172
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173 public HgChangelog getChangelog() {
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174 if (changelog == null) {
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175 CharSequence storagePath = repoPathHelper.rewrite("00changelog.i");
202
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176 RevlogStream content = resolve(Path.create(storagePath), true);
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177 changelog = new HgChangelog(this, content);
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178 }
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179 return changelog;
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180 }
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181
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182 public HgManifest getManifest() {
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183 if (manifest == null) {
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184 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true);
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185 manifest = new HgManifest(this, content, impl.buildFileNameEncodingHelper());
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186 }
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187 return manifest;
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188 }
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189
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190 public HgTags getTags() throws HgInvalidControlFileException {
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191 if (tags == null) {
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192 tags = new HgTags(this);
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193 HgDataFile hgTags = getFileNode(".hgtags");
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194 if (hgTags.exists()) {
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195 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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196 // method for data files as well, though it looks odd.
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197 try {
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198 ByteArrayChannel sink = new ByteArrayChannel();
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199 hgTags.content(i, sink);
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200 final String content = new String(sink.toArray(), "UTF8");
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201 tags.readGlobal(new StringReader(content));
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202 } catch (CancelledException ex) {
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203 // IGNORE, can't happen, we did not configure cancellation
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204 getContext().getLog().debug(getClass(), ex, null);
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205 } catch (IOException ex) {
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206 // UnsupportedEncodingException can't happen (UTF8)
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207 // only from readGlobal. Need to reconsider exceptions thrown from there:
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208 // BufferedReader wraps String and unlikely to throw IOException, perhaps, log is enough?
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209 getContext().getLog().error(getClass(), ex, null);
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210 // XXX need to decide what to do this. failure to read single revision shall not break complete cycle
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211 }
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212 }
318
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213 }
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214 File file2read = null;
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215 try {
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216 file2read = new File(getWorkingDir(), ".hgtags");
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217 tags.readGlobal(file2read); // XXX replace with HgDataFile.workingCopy
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218 file2read = new File(repoDir, "localtags");
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219 tags.readLocal(file2read);
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220 } catch (IOException ex) {
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221 getContext().getLog().error(getClass(), ex, null);
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222 throw new HgInvalidControlFileException("Failed to read tags", ex, file2read);
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223 }
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224 }
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225 return tags;
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226 }
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227
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228 public HgBranches getBranches() throws HgInvalidControlFileException {
220
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229 if (branches == null) {
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230 branches = new HgBranches(this);
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231 branches.collect(ProgressSupport.Factory.get(null));
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232 }
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233 return branches;
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234 }
231
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235
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236 @Experimental(reason="Perhaps, shall not cache instance, and provide loadMergeState as it may change often")
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237 public HgMergeState getMergeState() {
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238 if (mergeState == null) {
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239 mergeState = new HgMergeState(this);
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240 }
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241 return mergeState;
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242 }
220
8de327242aa0 Basic information about branches
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243
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244 public HgDataFile getFileNode(String path) {
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245 CharSequence nPath = normalizePath.rewrite(path);
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246 CharSequence storagePath = dataPathHelper.rewrite(nPath);
202
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247 RevlogStream content = resolve(Path.create(storagePath), false);
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248 Path p = Path.create(nPath);
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249 if (content == null) {
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250 return new HgDataFile(this, p);
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251 }
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252 return new HgDataFile(this, p, content);
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253 }
1
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254
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255 public HgDataFile getFileNode(Path path) {
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256 CharSequence storagePath = dataPathHelper.rewrite(path.toString());
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257 RevlogStream content = resolve(Path.create(storagePath), false);
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258 // XXX no content when no file? or HgDataFile.exists() to detect that?
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259 if (content == null) {
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260 return new HgDataFile(this, path);
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261 }
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262 return new HgDataFile(this, path, content);
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263 }
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264
142
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265 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/
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266 public PathRewrite getToRepoPathHelper() {
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267 return normalizePath;
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268 }
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269
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270 /**
348
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271 * @return pair of values, {@link Pair#first()} and {@link Pair#second()} are respective parents, never <code>null</code>.
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272 * @throws HgInvalidControlFileException if attempt to read information about working copy parents from dirstate failed
284
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273 */
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274 public Pair<Nodeid,Nodeid> getWorkingCopyParents() throws HgInvalidControlFileException {
284
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275 return HgDirstate.readParents(this, new File(repoDir, "dirstate"));
235
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276 }
252
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277
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278 /**
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279 * @return name of the branch associated with working directory, never <code>null</code>.
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280 * @throws HgInvalidControlFileException if attempt to read branch name failed.
252
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281 */
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282 public String getWorkingCopyBranchName() throws HgInvalidControlFileException {
430
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283 if (wcBranch == null) {
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284 wcBranch = HgDirstate.readBranch(this, new File(repoDir, "branch"));
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285 }
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286 return wcBranch;
252
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287 }
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288
237
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289 /**
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290 * @return location where user files (shall) reside
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291 */
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292 public File getWorkingDir() {
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293 return workingDir;
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294 }
239
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295
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296 /**
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297 * Provides access to sub-repositories defined in this repository. Enumerated sub-repositories are those directly
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298 * known, not recursive collection of all nested sub-repositories.
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299 * @return list of all known sub-repositories in this repository, or empty list if none found.
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300 */
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301 public List<HgSubrepoLocation> getSubrepositories() throws HgInvalidControlFileException {
239
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302 if (subRepos == null) {
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303 subRepos = new SubrepoManager(this);
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304 subRepos.read();
239
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305 }
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306 return subRepos.all();
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307 }
237
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308
331
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309
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310 public HgRepoConfig getConfiguration() /* XXX throws HgInvalidControlFileException? Description of the exception suggests it is only for files under ./hg/*/ {
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311 if (repoConfig == null) {
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312 try {
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313 ConfigFile configFile = impl.readConfiguration(this, getRepositoryRoot());
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314 repoConfig = new HgRepoConfig(configFile);
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315 } catch (IOException ex) {
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316 String m = "Errors while reading user configuration file";
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317 getContext().getLog().warn(getClass(), ex, m);
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318 return new HgRepoConfig(new ConfigFile()); // empty config, do not cache, allow to try once again
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319 //throw new HgInvalidControlFileException(m, ex, null);
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320 }
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321 }
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322 return repoConfig;
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323 }
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324
237
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325 // shall be of use only for internal classes
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326 /*package-local*/ File getRepositoryRoot() {
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327 return repoDir;
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328 }
337
f377f833b780 Issue 17: temporary code to nail down the problem
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329
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330 /*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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331 // may come handy for debug
337
f377f833b780 Issue 17: temporary code to nail down the problem
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332 return dataPathHelper.rewrite(df.getPath().toString()).toString();
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333 }
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334
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335 // 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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336 // XXX consider passing Path pool or factory to produce (shared) Path instead of Strings
431
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337 /*package-local*/ final HgDirstate loadDirstate(Path.Source pathFactory) throws HgInvalidControlFileException {
292
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338 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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339 if (!impl.isCaseSensitiveFileSystem()) {
292
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340 canonicalPath = new PathRewrite() {
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341
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342 public CharSequence rewrite(CharSequence path) {
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343 return path.toString().toLowerCase();
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344 }
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345 };
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346 }
431
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diff changeset
347 HgDirstate ds = new HgDirstate(this, new File(repoDir, "dirstate"), pathFactory, canonicalPath);
412
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348 ds.read(impl.buildFileNameEncodingHelper());
348
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349 return ds;
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350 }
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351
289
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352 /**
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353 * Access to configured set of ignored files.
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354 * @see HgIgnore#isIgnored(Path)
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diff changeset
355 */
335
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356 public HgIgnore getIgnore() /*throws HgInvalidControlFileException */{
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357 // TODO read config for additional locations
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diff changeset
358 if (ignore == null) {
409
0f5696623512 Support glob path pattern rewrite to facilitate use of globs with Windows path separator
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diff changeset
359 ignore = new HgIgnore(getToRepoPathHelper());
335
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360 File ignoreFile = new File(getWorkingDir(), ".hgignore");
91
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diff changeset
361 try {
335
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diff changeset
362 final List<String> errors = ignore.read(ignoreFile);
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363 if (errors != null) {
407
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364 getContext().getLog().warn(getClass(), "Syntax errors parsing .hgignore:\n%s", Internals.join(errors, ",\n"));
335
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365 }
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366 } catch (IOException ex) {
335
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367 final String m = "Error reading .hgignore file";
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368 getContext().getLog().warn(getClass(), ex, m);
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369 // throw new HgInvalidControlFileException(m, ex, ignoreFile);
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370 }
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371 }
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372 return ignore;
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373 }
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374
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375 /*package-local*/ DataAccessProvider getDataAccess() {
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376 return dataAccess;
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377 }
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378
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379 /**
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380 * Perhaps, should be separate interface, like ContentLookup
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381 * path - repository storage path (i.e. one usually with .i or .d)
2
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382 */
202
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383 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) {
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384 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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385 RevlogStream cached = ref == null ? null : ref.get();
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386 if (cached != null) {
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387 return cached;
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388 }
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389 File f = new File(repoDir, path.toString());
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390 if (f.exists()) {
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391 RevlogStream s = new RevlogStream(dataAccess, f);
388
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392 if (impl.shallCacheRevlogs()) {
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393 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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394 }
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395 return s;
202
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396 } else {
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397 if (shallFakeNonExistent) {
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398 try {
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399 File fake = File.createTempFile(f.getName(), null);
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400 fake.deleteOnExit();
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401 return new RevlogStream(dataAccess, fake);
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402 } catch (IOException ex) {
295
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403 getContext().getLog().info(getClass(), ex, null);
202
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404 }
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405 }
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406 }
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407 return null; // XXX empty stream instead?
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408 }
114
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409
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410 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) {
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411 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo));
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412 }
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413
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414 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) {
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415 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo));
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416 }
237
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417
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418 /*package-local*/ File getFile(HgDataFile dataFile) {
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419 return new File(getWorkingDir(), dataFile.getPath().toString());
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420 }
295
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diff changeset
421
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422 /*package-local*/ SessionContext getContext() {
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423 return sessionContext;
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diff changeset
424 }
412
63c5a9d7ca3f Follow-up for Issue 29: unify path translation for manifest and dirstate
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diff changeset
425
63c5a9d7ca3f Follow-up for Issue 29: unify path translation for manifest and dirstate
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diff changeset
426 /*package-local*/ Internals getImplHelper() {
63c5a9d7ca3f Follow-up for Issue 29: unify path translation for manifest and dirstate
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diff changeset
427 return impl;
63c5a9d7ca3f Follow-up for Issue 29: unify path translation for manifest and dirstate
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diff changeset
428 }
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429
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diff changeset
430 private List<Filter> instantiateFilters(Path p, Filter.Options opts) {
331
a37ce7145c3f Access to repository configuration
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diff changeset
431 List<Filter.Factory> factories = impl.getFilters(this);
114
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diff changeset
432 if (factories.isEmpty()) {
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diff changeset
433 return Collections.emptyList();
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434 }
46291ec605a0 Filters to read and initialize according to configuration files
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435 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size());
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diff changeset
436 for (Filter.Factory ff : factories) {
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diff changeset
437 Filter f = ff.create(p, opts);
46291ec605a0 Filters to read and initialize according to configuration files
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diff changeset
438 if (f != null) {
46291ec605a0 Filters to read and initialize according to configuration files
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diff changeset
439 rv.add(f);
46291ec605a0 Filters to read and initialize according to configuration files
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diff changeset
440 }
46291ec605a0 Filters to read and initialize according to configuration files
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diff changeset
441 }
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diff changeset
442 return rv;
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diff changeset
443 }
0
dbd663faec1f Basic changelog parsing
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parents:
diff changeset
444 }