Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 423:9c9c442b5f2e

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Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 23 Mar 2012 22:51:18 +0100
parents fdd7d756dea0
children 48f993aa2f41
rev   line source
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382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants
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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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0ae53c32ecef Straighten out exceptions thrown when file access failed - three is too much
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28 import org.tmatesoft.hg.core.HgException;
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29 import org.tmatesoft.hg.core.Nodeid;
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30 import org.tmatesoft.hg.core.SessionContext;
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31 import org.tmatesoft.hg.internal.ByteArrayChannel;
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32 import org.tmatesoft.hg.internal.ConfigFile;
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33 import org.tmatesoft.hg.internal.DataAccessProvider;
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34 import org.tmatesoft.hg.internal.Experimental;
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35 import org.tmatesoft.hg.internal.Filter;
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36 import org.tmatesoft.hg.internal.Internals;
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c677e1593919 Moved RevlogStream implementation into .internal
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37 import org.tmatesoft.hg.internal.RevlogStream;
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38 import org.tmatesoft.hg.internal.SubrepoManager;
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39 import org.tmatesoft.hg.util.CancelledException;
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40 import org.tmatesoft.hg.util.Pair;
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41 import org.tmatesoft.hg.util.Path;
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42 import org.tmatesoft.hg.util.PathPool;
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19e9e220bf68 Convenient commands constitute hi-level API. org.tmatesoft namespace, GPL2 statement
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43 import org.tmatesoft.hg.util.PathRewrite;
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44 import org.tmatesoft.hg.util.ProgressSupport;
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a3576694a4d1 Repository detection from local/specified directory
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48 /**
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49 * Shall be as state-less as possible, all the caching happens outside the repo, in commands/walkers
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50 *
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51 * @author Artem Tikhomirov
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52 * @author TMate Software Ltd.
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53 */
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54 public final class HgRepository {
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56 // IMPORTANT: if new constants added, consider fixing HgInternals#wrongRevisionIndex and HgInvalidRevisionException#getMessage
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58 /**
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59 * Revision index constant to indicate most recent revision
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60 */
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61 public static final int TIP = -3; // XXX TIP_REVISION?
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63 /**
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64 * Revision index constant to indicate invalid revision index value.
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65 * Primary use is default/uninitialized values where user input is expected and as return value where
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66 * an exception (e.g. {@link HgInvalidRevisionException}) is not desired
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67 */
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68 public static final int BAD_REVISION = Integer.MIN_VALUE; // XXX INVALID_REVISION?
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70 /**
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71 * Revision index constant to indicate working copy
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72 */
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73 public static final int WORKING_COPY = -2; // XXX WORKING_COPY_REVISION?
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75 /**
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76 * Constant ({@value #NO_REVISION}) to indicate revision absence or a fictitious revision of an empty repository.
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77 *
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78 * <p>Revision absence is vital e.g. for missing parent from {@link HgChangelog#parents(int, int[], byte[], byte[])} call and
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79 * to report cases when changeset records no corresponding manifest
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80 * revision {@link HgManifest#walk(int, int, org.tmatesoft.hg.repo.HgManifest.Inspector)}.
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81 *
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82 * <p> Use as imaginary revision/empty repository is handy as an argument (contrary to {@link #BAD_REVISION})
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83 * e.g in a status operation to visit changes from the very beginning of a repository.
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84 */
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85 public static final int NO_REVISION = -1;
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86
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87 /**
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88 * Name of the primary branch, "default".
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89 */
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90 public static final String DEFAULT_BRANCH_NAME = "default";
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91
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92 // temp aux marker method
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93 public static IllegalStateException notImplemented() {
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94 return new IllegalStateException("Not implemented");
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95 }
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97 private final File repoDir; // .hg folder
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98 private final File workingDir; // .hg/../
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99 private final String repoLocation;
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100 private final DataAccessProvider dataAccess;
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101 private final PathRewrite normalizePath;
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102 private final PathRewrite dataPathHelper;
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103 private final PathRewrite repoPathHelper;
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104 private final SessionContext sessionContext;
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105
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106 private HgChangelog changelog;
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107 private HgManifest manifest;
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108 private HgTags tags;
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109 private HgBranches branches;
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110 private HgMergeState mergeState;
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111 private SubrepoManager subRepos;
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112
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113 // XXX perhaps, shall enable caching explicitly
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114 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>();
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116 private final org.tmatesoft.hg.internal.Internals impl;
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117 private HgIgnore ignore;
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118 private HgRepoConfig repoConfig;
220
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119
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120 HgRepository(String repositoryPath) {
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121 repoDir = null;
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122 workingDir = null;
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123 repoLocation = repositoryPath;
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124 dataAccess = null;
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125 dataPathHelper = repoPathHelper = null;
142
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126 normalizePath = null;
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127 sessionContext = null;
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128 impl = null;
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129 }
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130
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131 HgRepository(SessionContext ctx, String repositoryPath, File repositoryRoot) {
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132 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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133 assert repositoryPath != null;
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134 assert repositoryRoot != null;
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135 assert ctx != null;
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136 repoDir = repositoryRoot;
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137 workingDir = repoDir.getParentFile();
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138 if (workingDir == null) {
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139 throw new IllegalArgumentException(repoDir.toString());
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140 }
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141 impl = new org.tmatesoft.hg.internal.Internals(ctx);
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142 repoLocation = repositoryPath;
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143 sessionContext = ctx;
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144 dataAccess = new DataAccessProvider(ctx);
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145 impl.parseRequires(this, new File(repoDir, "requires"));
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146 normalizePath = impl.buildNormalizePathRewrite();
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147 dataPathHelper = impl.buildDataFilesHelper();
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148 repoPathHelper = impl.buildRepositoryFilesHelper();
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149 }
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150
145
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151 @Override
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152 public String toString() {
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153 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]";
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154 }
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155
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156 public String getLocation() {
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157 return repoLocation;
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158 }
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159
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160 public boolean isInvalid() {
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161 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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162 }
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163
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164 public HgChangelog getChangelog() {
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165 if (changelog == null) {
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166 CharSequence storagePath = repoPathHelper.rewrite("00changelog.i");
202
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167 RevlogStream content = resolve(Path.create(storagePath), true);
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168 changelog = new HgChangelog(this, content);
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169 }
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170 return changelog;
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171 }
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172
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173 public HgManifest getManifest() {
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174 if (manifest == null) {
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175 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true);
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176 manifest = new HgManifest(this, content, impl.buildFileNameEncodingHelper());
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177 }
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178 return manifest;
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179 }
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180
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181 public HgTags getTags() throws HgInvalidControlFileException {
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182 if (tags == null) {
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183 tags = new HgTags(this);
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184 HgDataFile hgTags = getFileNode(".hgtags");
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185 if (hgTags.exists()) {
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186 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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187 // method for data files as well, though it looks odd.
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188 try {
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189 ByteArrayChannel sink = new ByteArrayChannel();
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190 hgTags.content(i, sink);
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191 final String content = new String(sink.toArray(), "UTF8");
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192 tags.readGlobal(new StringReader(content));
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193 } catch (CancelledException ex) {
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194 // IGNORE, can't happen, we did not configure cancellation
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195 getContext().getLog().debug(getClass(), ex, null);
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196 } catch (HgException ex) {
318
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197 getContext().getLog().error(getClass(), ex, null);
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198 // FIXME EXCEPTIONS need to react
318
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199 } catch (IOException ex) {
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200 // UnsupportedEncodingException can't happen (UTF8)
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201 // only from readGlobal. Need to reconsider exceptions thrown from there:
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202 // BufferedReader wraps String and unlikely to throw IOException, perhaps, log is enough?
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203 getContext().getLog().error(getClass(), ex, null);
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204 // XXX need to decide what to do this. failure to read single revision shall not break complete cycle
234
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205 }
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206 }
318
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207 }
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208 File file2read = null;
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209 try {
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210 file2read = new File(getWorkingDir(), ".hgtags");
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211 tags.readGlobal(file2read); // XXX replace with HgDataFile.workingCopy
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212 file2read = new File(repoDir, "localtags");
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213 tags.readLocal(file2read);
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214 } catch (IOException ex) {
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215 getContext().getLog().error(getClass(), ex, null);
318
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216 throw new HgInvalidControlFileException("Failed to read tags", ex, file2read);
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217 }
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218 }
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219 return tags;
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220 }
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221
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222 public HgBranches getBranches() throws HgInvalidControlFileException {
220
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223 if (branches == null) {
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224 branches = new HgBranches(this);
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225 branches.collect(ProgressSupport.Factory.get(null));
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226 }
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227 return branches;
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228 }
231
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229
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230 @Experimental(reason="Perhaps, shall not cache instance, and provide loadMergeState as it may change often")
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231 public HgMergeState getMergeState() {
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232 if (mergeState == null) {
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233 mergeState = new HgMergeState(this);
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234 }
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235 return mergeState;
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236 }
220
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237
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238 public HgDataFile getFileNode(String path) {
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239 CharSequence nPath = normalizePath.rewrite(path);
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240 CharSequence storagePath = dataPathHelper.rewrite(nPath);
202
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241 RevlogStream content = resolve(Path.create(storagePath), false);
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242 Path p = Path.create(nPath);
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243 if (content == null) {
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244 return new HgDataFile(this, p);
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245 }
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246 return new HgDataFile(this, p, content);
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247 }
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248
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249 public HgDataFile getFileNode(Path path) {
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250 CharSequence storagePath = dataPathHelper.rewrite(path.toString());
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251 RevlogStream content = resolve(Path.create(storagePath), false);
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252 // XXX no content when no file? or HgDataFile.exists() to detect that?
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253 if (content == null) {
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254 return new HgDataFile(this, path);
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255 }
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256 return new HgDataFile(this, path, content);
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257 }
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258
142
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259 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/
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260 public PathRewrite getToRepoPathHelper() {
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261 return normalizePath;
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262 }
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263
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264 /**
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265 * @return pair of values, {@link Pair#first()} and {@link Pair#second()} are respective parents, never <code>null</code>.
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266 * @throws HgInvalidControlFileException if attempt to read information about working copy parents from dirstate failed
284
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267 */
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268 public Pair<Nodeid,Nodeid> getWorkingCopyParents() throws HgInvalidControlFileException {
284
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269 return HgDirstate.readParents(this, new File(repoDir, "dirstate"));
235
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270 }
252
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271
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272 /**
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273 * @return name of the branch associated with working directory, never <code>null</code>.
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274 * @throws HgInvalidControlFileException if attempt to read branch name failed.
252
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275 */
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276 public String getWorkingCopyBranchName() throws HgInvalidControlFileException {
284
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277 return HgDirstate.readBranch(this);
252
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278 }
2
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279
237
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280 /**
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281 * @return location where user files (shall) reside
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282 */
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283 public File getWorkingDir() {
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284 return workingDir;
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285 }
239
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286
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287 /**
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288 * Provides access to sub-repositories defined in this repository. Enumerated sub-repositories are those directly
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289 * known, not recursive collection of all nested sub-repositories.
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290 * @return list of all known sub-repositories in this repository, or empty list if none found.
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291 */
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292 public List<HgSubrepoLocation> getSubrepositories() throws HgInvalidControlFileException {
239
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293 if (subRepos == null) {
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294 subRepos = new SubrepoManager(this);
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295 subRepos.read();
239
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296 }
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297 return subRepos.all();
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298 }
237
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299
331
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300
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301 public HgRepoConfig getConfiguration() /* XXX throws HgInvalidControlFileException? Description of the exception suggests it is only for files under ./hg/*/ {
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302 if (repoConfig == null) {
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303 try {
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304 ConfigFile configFile = impl.readConfiguration(this, getRepositoryRoot());
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305 repoConfig = new HgRepoConfig(configFile);
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306 } catch (IOException ex) {
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307 String m = "Errors while reading user configuration file";
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308 getContext().getLog().warn(getClass(), ex, m);
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309 return new HgRepoConfig(new ConfigFile()); // empty config, do not cache, allow to try once again
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310 //throw new HgInvalidControlFileException(m, ex, null);
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311 }
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312 }
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313 return repoConfig;
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314 }
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315
237
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316 // shall be of use only for internal classes
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317 /*package-local*/ File getRepositoryRoot() {
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318 return repoDir;
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319 }
337
f377f833b780 Issue 17: temporary code to nail down the problem
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320
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321 /*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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322 // may come handy for debug
337
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323 return dataPathHelper.rewrite(df.getPath().toString()).toString();
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324 }
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325
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326 // 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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327 // XXX consider passing Path pool or factory to produce (shared) Path instead of Strings
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328 /*package-local*/ final HgDirstate loadDirstate(PathPool pathPool) throws HgInvalidControlFileException {
292
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diff changeset
329 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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diff changeset
330 if (!impl.isCaseSensitiveFileSystem()) {
292
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diff changeset
331 canonicalPath = new PathRewrite() {
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diff changeset
332
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333 public CharSequence rewrite(CharSequence path) {
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diff changeset
334 return path.toString().toLowerCase();
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335 }
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336 };
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337 }
348
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diff changeset
338 HgDirstate ds = new HgDirstate(this, new File(repoDir, "dirstate"), pathPool, canonicalPath);
412
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339 ds.read(impl.buildFileNameEncodingHelper());
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340 return ds;
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341 }
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342
289
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343 /**
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344 * Access to configured set of ignored files.
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345 * @see HgIgnore#isIgnored(Path)
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346 */
335
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347 public HgIgnore getIgnore() /*throws HgInvalidControlFileException */{
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348 // TODO read config for additional locations
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349 if (ignore == null) {
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350 ignore = new HgIgnore(getToRepoPathHelper());
335
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351 File ignoreFile = new File(getWorkingDir(), ".hgignore");
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352 try {
335
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353 final List<String> errors = ignore.read(ignoreFile);
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354 if (errors != null) {
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355 getContext().getLog().warn(getClass(), "Syntax errors parsing .hgignore:\n%s", Internals.join(errors, ",\n"));
335
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356 }
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357 } catch (IOException ex) {
335
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358 final String m = "Error reading .hgignore file";
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359 getContext().getLog().warn(getClass(), ex, m);
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360 // throw new HgInvalidControlFileException(m, ex, ignoreFile);
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361 }
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362 }
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363 return ignore;
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364 }
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365
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366 /*package-local*/ DataAccessProvider getDataAccess() {
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367 return dataAccess;
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368 }
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369
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370 /**
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371 * Perhaps, should be separate interface, like ContentLookup
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372 * path - repository storage path (i.e. one usually with .i or .d)
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373 */
202
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374 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) {
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375 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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376 RevlogStream cached = ref == null ? null : ref.get();
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377 if (cached != null) {
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378 return cached;
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379 }
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380 File f = new File(repoDir, path.toString());
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381 if (f.exists()) {
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382 RevlogStream s = new RevlogStream(dataAccess, f);
388
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383 if (impl.shallCacheRevlogs()) {
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384 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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385 }
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386 return s;
202
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387 } else {
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388 if (shallFakeNonExistent) {
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389 try {
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390 File fake = File.createTempFile(f.getName(), null);
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391 fake.deleteOnExit();
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392 return new RevlogStream(dataAccess, fake);
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393 } catch (IOException ex) {
295
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394 getContext().getLog().info(getClass(), ex, null);
202
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395 }
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396 }
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397 }
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398 return null; // XXX empty stream instead?
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399 }
114
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400
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401 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) {
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402 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo));
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403 }
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404
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405 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) {
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406 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo));
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407 }
237
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408
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409 /*package-local*/ File getFile(HgDataFile dataFile) {
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410 return new File(getWorkingDir(), dataFile.getPath().toString());
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411 }
295
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412
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413 /*package-local*/ SessionContext getContext() {
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414 return sessionContext;
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diff changeset
415 }
412
63c5a9d7ca3f Follow-up for Issue 29: unify path translation for manifest and dirstate
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 409
diff changeset
416
63c5a9d7ca3f Follow-up for Issue 29: unify path translation for manifest and dirstate
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diff changeset
417 /*package-local*/ Internals getImplHelper() {
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diff changeset
418 return impl;
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diff changeset
419 }
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420
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421 private List<Filter> instantiateFilters(Path p, Filter.Options opts) {
331
a37ce7145c3f Access to repository configuration
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diff changeset
422 List<Filter.Factory> factories = impl.getFilters(this);
114
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diff changeset
423 if (factories.isEmpty()) {
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diff changeset
424 return Collections.emptyList();
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diff changeset
425 }
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diff changeset
426 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size());
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diff changeset
427 for (Filter.Factory ff : factories) {
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diff changeset
428 Filter f = ff.create(p, opts);
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diff changeset
429 if (f != null) {
46291ec605a0 Filters to read and initialize according to configuration files
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diff changeset
430 rv.add(f);
46291ec605a0 Filters to read and initialize according to configuration files
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diff changeset
431 }
46291ec605a0 Filters to read and initialize according to configuration files
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diff changeset
432 }
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diff changeset
433 return rv;
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diff changeset
434 }
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
435 }