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annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 396:0ae53c32ecef

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Straighten out exceptions thrown when file access failed - three is too much
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 23 Feb 2012 01:06:24 +0100
parents b015f3918120
children 2747b0723867
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.Nodeid;
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31 import org.tmatesoft.hg.core.SessionContext;
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32 import org.tmatesoft.hg.internal.ByteArrayChannel;
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33 import org.tmatesoft.hg.internal.ConfigFile;
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34 import org.tmatesoft.hg.internal.DataAccessProvider;
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35 import org.tmatesoft.hg.internal.Experimental;
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36 import org.tmatesoft.hg.internal.Filter;
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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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43 import org.tmatesoft.hg.util.PathRewrite;
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44 import org.tmatesoft.hg.util.ProgressSupport;
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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 // if new constants added, consider fixing HgInternals#wrongRevisionIndex
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57 public static final int TIP = -3;
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58 public static final int BAD_REVISION = Integer.MIN_VALUE;
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59 public static final int WORKING_COPY = -2;
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61 public static final String DEFAULT_BRANCH_NAME = "default";
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63 // temp aux marker method
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64 public static IllegalStateException notImplemented() {
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65 return new IllegalStateException("Not implemented");
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66 }
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68 private final File repoDir; // .hg folder
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69 private final File workingDir; // .hg/../
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70 private final String repoLocation;
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71 private final DataAccessProvider dataAccess;
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72 private final PathRewrite normalizePath;
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73 private final PathRewrite dataPathHelper;
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74 private final PathRewrite repoPathHelper;
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75 private final SessionContext sessionContext;
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77 private HgChangelog changelog;
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78 private HgManifest manifest;
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79 private HgTags tags;
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80 private HgBranches branches;
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81 private HgMergeState mergeState;
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82 private SubrepoManager subRepos;
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84 // XXX perhaps, shall enable caching explicitly
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85 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>();
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87 private final org.tmatesoft.hg.internal.Internals impl;
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88 private HgIgnore ignore;
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89 private HgRepoConfig repoConfig;
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91 HgRepository(String repositoryPath) {
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92 repoDir = null;
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93 workingDir = null;
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94 repoLocation = repositoryPath;
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95 dataAccess = null;
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96 dataPathHelper = repoPathHelper = null;
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97 normalizePath = null;
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98 sessionContext = null;
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99 impl = null;
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100 }
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102 HgRepository(SessionContext ctx, String repositoryPath, File repositoryRoot) {
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103 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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104 assert repositoryPath != null;
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105 assert repositoryRoot != null;
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106 assert ctx != null;
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107 repoDir = repositoryRoot;
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108 workingDir = repoDir.getParentFile();
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109 if (workingDir == null) {
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110 throw new IllegalArgumentException(repoDir.toString());
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111 }
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112 impl = new org.tmatesoft.hg.internal.Internals(ctx);
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113 repoLocation = repositoryPath;
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114 sessionContext = ctx;
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115 dataAccess = new DataAccessProvider(ctx);
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116 impl.parseRequires(this, new File(repoDir, "requires"));
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117 normalizePath = impl.buildNormalizePathRewrite();
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118 dataPathHelper = impl.buildDataFilesHelper();
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119 repoPathHelper = impl.buildRepositoryFilesHelper();
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120 }
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121
145
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122 @Override
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123 public String toString() {
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124 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]";
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125 }
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126
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127 public String getLocation() {
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128 return repoLocation;
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129 }
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130
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131 public boolean isInvalid() {
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132 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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133 }
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134
97
ee2c750b036d Changelog to HgChangelog
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135 public HgChangelog getChangelog() {
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136 if (changelog == null) {
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137 CharSequence storagePath = repoPathHelper.rewrite("00changelog.i");
202
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138 RevlogStream content = resolve(Path.create(storagePath), true);
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139 changelog = new HgChangelog(this, content);
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140 }
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141 return changelog;
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142 }
2
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143
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144 public HgManifest getManifest() {
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145 if (manifest == null) {
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146 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true);
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147 manifest = new HgManifest(this, content);
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148 }
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149 return manifest;
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150 }
50
f1db8610da62 Log to consult (placeholder, for now) class to find out associated tags
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151
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152 public HgTags getTags() throws HgInvalidControlFileException {
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153 if (tags == null) {
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154 tags = new HgTags(this);
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155 HgDataFile hgTags = getFileNode(".hgtags");
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156 if (hgTags.exists()) {
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157 for (int i = 0; i <= hgTags.getLastRevision(); i++) { // FIXME in fact, would be handy to have walk(start,end)
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158 // method for data files as well, though it looks odd.
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159 try {
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160 ByteArrayChannel sink = new ByteArrayChannel();
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161 hgTags.content(i, sink);
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162 final String content = new String(sink.toArray(), "UTF8");
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163 tags.readGlobal(new StringReader(content));
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164 } catch (CancelledException ex) {
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165 // IGNORE, can't happen, we did not configure cancellation
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166 getContext().getLog().debug(getClass(), ex, null);
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167 } catch (HgException ex) {
318
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168 getContext().getLog().error(getClass(), ex, null);
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169 // FIXME need to react
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170 } catch (IOException ex) {
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171 // UnsupportedEncodingException can't happen (UTF8)
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172 // only from readGlobal. Need to reconsider exceptions thrown from there:
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173 // BufferedReader wraps String and unlikely to throw IOException, perhaps, log is enough?
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174 getContext().getLog().error(getClass(), ex, null);
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175 // XXX need to decide what to do this. failure to read single revision shall not break complete cycle
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176 }
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177 }
318
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178 }
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179 File file2read = null;
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180 try {
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181 file2read = new File(getWorkingDir(), ".hgtags");
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182 tags.readGlobal(file2read); // XXX replace with HgDataFile.workingCopy
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183 file2read = new File(repoDir, "localtags");
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184 tags.readLocal(file2read);
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185 } catch (IOException ex) {
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981f9f50bb6c Issue 11: Error log facility. SessionContext to share common facilities
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186 getContext().getLog().error(getClass(), ex, null);
318
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187 throw new HgInvalidControlFileException("Failed to read tags", ex, file2read);
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188 }
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189 }
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190 return tags;
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191 }
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192
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193 public HgBranches getBranches() throws HgInvalidControlFileException {
220
8de327242aa0 Basic information about branches
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194 if (branches == null) {
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195 branches = new HgBranches(this);
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196 branches.collect(ProgressSupport.Factory.get(null));
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197 }
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198 return branches;
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199 }
231
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200
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201 @Experimental(reason="Perhaps, shall not cache instance, and provide loadMergeState as it may change often")
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202 public HgMergeState getMergeState() {
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203 if (mergeState == null) {
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204 mergeState = new HgMergeState(this);
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205 }
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206 return mergeState;
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207 }
220
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208
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209 public HgDataFile getFileNode(String path) {
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210 CharSequence nPath = normalizePath.rewrite(path);
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211 CharSequence storagePath = dataPathHelper.rewrite(nPath);
202
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212 RevlogStream content = resolve(Path.create(storagePath), false);
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213 Path p = Path.create(nPath);
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214 if (content == null) {
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diff changeset
215 return new HgDataFile(this, p);
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216 }
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217 return new HgDataFile(this, p, content);
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218 }
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219
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220 public HgDataFile getFileNode(Path path) {
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221 CharSequence storagePath = dataPathHelper.rewrite(path.toString());
202
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222 RevlogStream content = resolve(Path.create(storagePath), false);
115
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223 // XXX no content when no file? or HgDataFile.exists() to detect that?
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224 if (content == null) {
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225 return new HgDataFile(this, path);
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226 }
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227 return new HgDataFile(this, path, content);
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228 }
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229
142
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diff changeset
230 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/
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diff changeset
231 public PathRewrite getToRepoPathHelper() {
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diff changeset
232 return normalizePath;
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233 }
284
7232b94f2ae3 HgDirstate shall operate with Path instead of String for file names. Use of Pair instead of array of unspecified length for parents.
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234
7232b94f2ae3 HgDirstate shall operate with Path instead of String for file names. Use of Pair instead of array of unspecified length for parents.
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diff changeset
235 /**
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diff changeset
236 * @return pair of values, {@link Pair#first()} and {@link Pair#second()} are respective parents, never <code>null</code>.
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237 * @throws HgInvalidControlFileException if attempt to read information about working copy parents from dirstate failed
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diff changeset
238 */
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diff changeset
239 public Pair<Nodeid,Nodeid> getWorkingCopyParents() throws HgInvalidControlFileException {
284
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diff changeset
240 return HgDirstate.readParents(this, new File(repoDir, "dirstate"));
235
fd845a53f53d Experimental access to working dir parents
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diff changeset
241 }
252
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242
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243 /**
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244 * @return name of the branch associated with working directory, never <code>null</code>.
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245 * @throws HgInvalidControlFileException if attempt to read branch name failed.
252
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246 */
348
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247 public String getWorkingCopyBranchName() throws HgInvalidControlFileException {
284
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248 return HgDirstate.readBranch(this);
252
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249 }
2
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250
237
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251 /**
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252 * @return location where user files (shall) reside
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253 */
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254 public File getWorkingDir() {
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255 return workingDir;
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256 }
239
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257
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258 /**
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259 * Provides access to sub-repositories defined in this repository. Enumerated sub-repositories are those directly
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260 * known, not recursive collection of all nested sub-repositories.
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261 * @return list of all known sub-repositories in this repository, or empty list if none found.
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262 */
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263 public List<HgSubrepoLocation> getSubrepositories() throws HgInvalidControlFileException {
239
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264 if (subRepos == null) {
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265 subRepos = new SubrepoManager(this);
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266 subRepos.read();
239
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267 }
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268 return subRepos.all();
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269 }
237
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270
331
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271
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272 public HgRepoConfig getConfiguration() /* XXX throws HgInvalidControlFileException? Description of the exception suggests it is only for files under ./hg/*/ {
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273 if (repoConfig == null) {
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274 try {
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275 ConfigFile configFile = impl.readConfiguration(this, getRepositoryRoot());
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276 repoConfig = new HgRepoConfig(configFile);
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277 } catch (IOException ex) {
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278 String m = "Errors while reading user configuration file";
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279 getContext().getLog().warn(getClass(), ex, m);
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280 return new HgRepoConfig(new ConfigFile()); // empty config, do not cache, allow to try once again
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281 //throw new HgInvalidControlFileException(m, ex, null);
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282 }
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283 }
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284 return repoConfig;
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285 }
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286
237
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287 // shall be of use only for internal classes
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288 /*package-local*/ File getRepositoryRoot() {
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289 return repoDir;
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290 }
337
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291
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292 // FIXME remove once NPE in HgWorkingCopyStatusCollector.areTheSame is solved
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293 /*package-local, debug*/String getStoragePath(HgDataFile df) {
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294 return dataPathHelper.rewrite(df.getPath().toString()).toString();
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295 }
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296
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297 // 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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298 // XXX consider passing Path pool or factory to produce (shared) Path instead of Strings
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299 /*package-local*/ final HgDirstate loadDirstate(PathPool pathPool) throws HgInvalidControlFileException {
292
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300 PathRewrite canonicalPath = null;
388
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301 if (!impl.isCaseSensitiveFileSystem()) {
292
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302 canonicalPath = new PathRewrite() {
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303
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304 public CharSequence rewrite(CharSequence path) {
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305 return path.toString().toLowerCase();
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306 }
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307 };
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308 }
348
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309 HgDirstate ds = new HgDirstate(this, new File(repoDir, "dirstate"), pathPool, canonicalPath);
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310 ds.read();
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311 return ds;
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312 }
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313
289
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314 /**
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315 * Access to configured set of ignored files.
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316 * @see HgIgnore#isIgnored(Path)
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317 */
335
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318 public HgIgnore getIgnore() /*throws HgInvalidControlFileException */{
91
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319 // TODO read config for additional locations
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320 if (ignore == null) {
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321 ignore = new HgIgnore();
335
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322 File ignoreFile = new File(getWorkingDir(), ".hgignore");
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323 try {
335
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324 final List<String> errors = ignore.read(ignoreFile);
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325 if (errors != null) {
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diff changeset
326 getContext().getLog().warn(getClass(), "Syntax errors parsing .hgignore:\n%s", errors);
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327 }
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328 } catch (IOException ex) {
335
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diff changeset
329 final String m = "Error reading .hgignore file";
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330 getContext().getLog().warn(getClass(), ex, m);
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331 // throw new HgInvalidControlFileException(m, ex, ignoreFile);
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332 }
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333 }
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334 return ignore;
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335 }
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336
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337 /*package-local*/ DataAccessProvider getDataAccess() {
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338 return dataAccess;
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339 }
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340
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341 /**
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342 * Perhaps, should be separate interface, like ContentLookup
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343 * path - repository storage path (i.e. one usually with .i or .d)
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344 */
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345 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) {
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346 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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347 RevlogStream cached = ref == null ? null : ref.get();
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348 if (cached != null) {
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349 return cached;
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350 }
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351 File f = new File(repoDir, path.toString());
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352 if (f.exists()) {
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diff changeset
353 RevlogStream s = new RevlogStream(dataAccess, f);
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354 if (impl.shallCacheRevlogs()) {
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355 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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356 }
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357 return s;
202
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358 } else {
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359 if (shallFakeNonExistent) {
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360 try {
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361 File fake = File.createTempFile(f.getName(), null);
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diff changeset
362 fake.deleteOnExit();
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363 return new RevlogStream(dataAccess, fake);
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364 } catch (IOException ex) {
295
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365 getContext().getLog().info(getClass(), ex, null);
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366 }
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367 }
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6f1b88693d48 Complete refactoring to org.tmatesoft
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368 }
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369 return null; // XXX empty stream instead?
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370 }
114
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371
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372 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) {
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373 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo));
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374 }
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375
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376 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) {
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377 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo));
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378 }
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6e1373b54e9b Allow access to working copy content through HgDataFile. Give access to repository's working dir
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379
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380 /*package-local*/ File getFile(HgDataFile dataFile) {
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381 return new File(getWorkingDir(), dataFile.getPath().toString());
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382 }
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383
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384 /*package-local*/ SessionContext getContext() {
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385 return sessionContext;
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386 }
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387
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388 private List<Filter> instantiateFilters(Path p, Filter.Options opts) {
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a37ce7145c3f Access to repository configuration
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389 List<Filter.Factory> factories = impl.getFilters(this);
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390 if (factories.isEmpty()) {
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391 return Collections.emptyList();
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392 }
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393 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size());
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394 for (Filter.Factory ff : factories) {
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395 Filter f = ff.create(p, opts);
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396 if (f != null) {
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397 rv.add(f);
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398 }
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399 }
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400 return rv;
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401 }
0
dbd663faec1f Basic changelog parsing
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402 }