Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 338:3cfa4d908fc9

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Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close())
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Nov 2011 04:47:03 +0100
parents f377f833b780
children a0864b2892cd
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) 2010-2011 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.HgDataStreamException;
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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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37 import org.tmatesoft.hg.internal.Internals;
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c677e1593919 Moved RevlogStream implementation into .internal
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38 import org.tmatesoft.hg.internal.RevlogStream;
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39 import org.tmatesoft.hg.internal.SubrepoManager;
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40 import org.tmatesoft.hg.util.CancelledException;
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41 import org.tmatesoft.hg.util.Pair;
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42 import org.tmatesoft.hg.util.Path;
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43 import org.tmatesoft.hg.util.PathPool;
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44 import org.tmatesoft.hg.util.PathRewrite;
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45 import org.tmatesoft.hg.util.ProgressSupport;
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49 /**
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50 * Shall be as state-less as possible, all the caching happens outside the repo, in commands/walkers
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51 *
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52 * @author Artem Tikhomirov
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53 * @author TMate Software Ltd.
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54 */
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55 public final class HgRepository {
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57 // if new constants added, consider fixing HgInternals#wrongLocalRevision
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58 public static final int TIP = -3;
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59 public static final int BAD_REVISION = Integer.MIN_VALUE;
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60 public static final int WORKING_COPY = -2;
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62 public static final String DEFAULT_BRANCH_NAME = "default";
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64 // temp aux marker method
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65 public static IllegalStateException notImplemented() {
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66 return new IllegalStateException("Not implemented");
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67 }
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69 private final File repoDir; // .hg folder
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70 private final File workingDir; // .hg/../
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71 private final String repoLocation;
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72 private final DataAccessProvider dataAccess;
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73 private final PathRewrite normalizePath;
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74 private final PathRewrite dataPathHelper;
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75 private final PathRewrite repoPathHelper;
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76 private final boolean isCaseSensitiveFileSystem; // FIXME keep this inside Internals impl and delegate to Internals all os/fs-specific tasks
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77 private final SessionContext sessionContext;
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79 private HgChangelog changelog;
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80 private HgManifest manifest;
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81 private HgTags tags;
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82 private HgBranches branches;
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83 private HgMergeState mergeState;
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84 private SubrepoManager subRepos;
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86 // XXX perhaps, shall enable caching explicitly
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87 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>();
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89 private final org.tmatesoft.hg.internal.Internals impl = new org.tmatesoft.hg.internal.Internals();
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90 private HgIgnore ignore;
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91 private HgRepoConfig repoConfig;
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93 HgRepository(String repositoryPath) {
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94 repoDir = null;
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95 workingDir = null;
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96 repoLocation = repositoryPath;
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97 dataAccess = null;
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98 dataPathHelper = repoPathHelper = null;
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99 normalizePath = null;
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100 sessionContext = null;
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101 isCaseSensitiveFileSystem = !Internals.runningOnWindows();
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102 }
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104 HgRepository(SessionContext ctx, String repositoryPath, File repositoryRoot) {
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105 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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106 assert repositoryPath != null;
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107 assert repositoryRoot != null;
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108 assert ctx != null;
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109 repoDir = repositoryRoot;
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110 workingDir = repoDir.getParentFile();
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111 if (workingDir == null) {
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112 throw new IllegalArgumentException(repoDir.toString());
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113 }
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114 repoLocation = repositoryPath;
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115 sessionContext = ctx;
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116 dataAccess = new DataAccessProvider(ctx);
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117 final boolean runningOnWindows = Internals.runningOnWindows();
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118 isCaseSensitiveFileSystem = !runningOnWindows;
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119 if (runningOnWindows) {
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120 normalizePath = new PathRewrite() {
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121
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122 public CharSequence rewrite(CharSequence p) {
142
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123 // TODO handle . and .. (although unlikely to face them from GUI client)
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124 String path = p.toString();
142
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125 path = path.replace('\\', '/').replace("//", "/");
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126 if (path.startsWith("/")) {
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127 path = path.substring(1);
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128 }
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129 return path;
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130 }
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131 };
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132 } else {
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133 normalizePath = new PathRewrite.Empty(); // or strip leading slash, perhaps?
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134 }
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135 impl.parseRequires(this, new File(repoDir, "requires"));
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136 dataPathHelper = impl.buildDataFilesHelper();
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137 repoPathHelper = impl.buildRepositoryFilesHelper();
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138 }
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139
145
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140 @Override
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141 public String toString() {
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142 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]";
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143 }
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144
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145 public String getLocation() {
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146 return repoLocation;
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147 }
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148
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149 public boolean isInvalid() {
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150 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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151 }
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152
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153 public HgChangelog getChangelog() {
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154 if (this.changelog == null) {
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155 CharSequence storagePath = repoPathHelper.rewrite("00changelog.i");
202
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156 RevlogStream content = resolve(Path.create(storagePath), true);
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157 this.changelog = new HgChangelog(this, content);
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158 }
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159 return this.changelog;
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160 }
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161
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162 public HgManifest getManifest() {
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163 if (this.manifest == null) {
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164 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true);
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165 this.manifest = new HgManifest(this, content);
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166 }
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167 return this.manifest;
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168 }
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169
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170 public HgTags getTags() throws HgInvalidControlFileException {
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171 if (tags == null) {
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172 tags = new HgTags(this);
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173 HgDataFile hgTags = getFileNode(".hgtags");
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174 if (hgTags.exists()) {
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175 for (int i = 0; i <= hgTags.getLastRevision(); i++) { // FIXME in fact, would be handy to have walk(start,end)
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176 // method for data files as well, though it looks odd.
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177 try {
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178 ByteArrayChannel sink = new ByteArrayChannel();
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179 hgTags.content(i, sink);
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180 final String content = new String(sink.toArray(), "UTF8");
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181 tags.readGlobal(new StringReader(content));
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182 } catch (CancelledException ex) {
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183 // IGNORE, can't happen, we did not configure cancellation
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184 getContext().getLog().debug(getClass(), ex, null);
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185 } catch (HgDataStreamException ex) {
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186 getContext().getLog().error(getClass(), ex, null);
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187 // FIXME need to react
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188 } catch (IOException ex) {
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189 // UnsupportedEncodingException can't happen (UTF8)
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190 // only from readGlobal. Need to reconsider exceptions thrown from there:
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191 // BufferedReader wraps String and unlikely to throw IOException, perhaps, log is enough?
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192 getContext().getLog().error(getClass(), ex, null);
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diff changeset
193 // XXX need to decide what to do this. failure to read single revision shall not break complete cycle
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194 }
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195 }
318
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196 }
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diff changeset
197 File file2read = null;
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198 try {
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199 file2read = new File(getWorkingDir(), ".hgtags");
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200 tags.readGlobal(file2read); // XXX replace with HgDataFile.workingCopy
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201 file2read = new File(repoDir, "localtags");
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202 tags.readLocal(file2read);
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diff changeset
203 } catch (IOException ex) {
295
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204 getContext().getLog().error(getClass(), ex, null);
318
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205 throw new HgInvalidControlFileException("Failed to read tags", ex, file2read);
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206 }
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207 }
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208 return tags;
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209 }
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diff changeset
210
231
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diff changeset
211 public HgBranches getBranches() {
220
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212 if (branches == null) {
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213 branches = new HgBranches(this);
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214 branches.collect(ProgressSupport.Factory.get(null));
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215 }
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216 return branches;
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217 }
231
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218
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219 @Experimental(reason="Perhaps, shall not cache instance, and provide loadMergeState as it may change often")
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diff changeset
220 public HgMergeState getMergeState() {
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221 if (mergeState == null) {
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diff changeset
222 mergeState = new HgMergeState(this);
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diff changeset
223 }
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224 return mergeState;
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225 }
220
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226
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diff changeset
227 public HgDataFile getFileNode(String path) {
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diff changeset
228 CharSequence nPath = normalizePath.rewrite(path);
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229 CharSequence storagePath = dataPathHelper.rewrite(nPath);
202
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230 RevlogStream content = resolve(Path.create(storagePath), false);
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231 Path p = Path.create(nPath);
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diff changeset
232 if (content == null) {
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diff changeset
233 return new HgDataFile(this, p);
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diff changeset
234 }
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diff changeset
235 return new HgDataFile(this, p, content);
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236 }
1
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237
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diff changeset
238 public HgDataFile getFileNode(Path path) {
292
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diff changeset
239 CharSequence storagePath = dataPathHelper.rewrite(path.toString());
202
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diff changeset
240 RevlogStream content = resolve(Path.create(storagePath), false);
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diff changeset
241 // XXX no content when no file? or HgDataFile.exists() to detect that?
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diff changeset
242 if (content == null) {
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diff changeset
243 return new HgDataFile(this, path);
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244 }
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245 return new HgDataFile(this, path, content);
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246 }
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247
142
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248 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/
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249 public PathRewrite getToRepoPathHelper() {
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250 return normalizePath;
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251 }
284
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252
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253 /**
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254 * @return pair of values, {@link Pair#first()} and {@link Pair#second()} are respective parents, never <code>null</code>.
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255 */
235
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256 public Pair<Nodeid,Nodeid> getWorkingCopyParents() {
284
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257 return HgDirstate.readParents(this, new File(repoDir, "dirstate"));
235
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258 }
252
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259
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260 /**
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261 * @return name of the branch associated with working directory, never <code>null</code>.
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262 */
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263 public String getWorkingCopyBranchName() {
284
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264 return HgDirstate.readBranch(this);
252
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265 }
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266
237
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267 /**
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268 * @return location where user files (shall) reside
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269 */
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270 public File getWorkingDir() {
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271 return workingDir;
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272 }
239
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273
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274 /**
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275 * Provides access to sub-repositories defined in this repository. Enumerated sub-repositories are those directly
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276 * known, not recursive collection of all nested sub-repositories.
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277 * @return list of all known sub-repositories in this repository, or empty list if none found.
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278 */
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279 public List<HgSubrepoLocation> getSubrepositories() {
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280 if (subRepos == null) {
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281 subRepos = new SubrepoManager(this);
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282 }
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283 return subRepos.all();
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284 }
237
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285
331
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286
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287 public HgRepoConfig getConfiguration() /* XXX throws HgInvalidControlFileException? Description of the exception suggests it is only for files under ./hg/*/ {
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288 if (repoConfig == null) {
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289 try {
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290 ConfigFile configFile = impl.readConfiguration(this, getRepositoryRoot());
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291 repoConfig = new HgRepoConfig(configFile);
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292 } catch (IOException ex) {
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293 String m = "Errors while reading user configuration file";
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294 getContext().getLog().warn(getClass(), ex, m);
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295 return new HgRepoConfig(new ConfigFile()); // empty config, do not cache, allow to try once again
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296 //throw new HgInvalidControlFileException(m, ex, null);
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297 }
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298 }
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299 return repoConfig;
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300 }
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301
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302 // shall be of use only for internal classes
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303 /*package-local*/ File getRepositoryRoot() {
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304 return repoDir;
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305 }
337
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306
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307 // FIXME remove once NPE in HgWorkingCopyStatusCollector.areTheSame is solved
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308 /*package-local, debug*/String getStoragePath(HgDataFile df) {
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309 return dataPathHelper.rewrite(df.getPath().toString()).toString();
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310 }
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311
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312 // 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
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313 // XXX consider passing Path pool or factory to produce (shared) Path instead of Strings
284
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314 /*package-local*/ final HgDirstate loadDirstate(PathPool pathPool) {
292
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315 PathRewrite canonicalPath = null;
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316 if (!isCaseSensitiveFileSystem) {
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317 canonicalPath = new PathRewrite() {
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318
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319 public CharSequence rewrite(CharSequence path) {
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320 return path.toString().toLowerCase();
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321 }
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322 };
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323 }
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324 return new HgDirstate(this, new File(repoDir, "dirstate"), pathPool, canonicalPath);
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325 }
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326
289
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327 /**
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328 * Access to configured set of ignored files.
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329 * @see HgIgnore#isIgnored(Path)
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330 */
335
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331 public HgIgnore getIgnore() /*throws HgInvalidControlFileException */{
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332 // TODO read config for additional locations
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333 if (ignore == null) {
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334 ignore = new HgIgnore();
335
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335 File ignoreFile = new File(getWorkingDir(), ".hgignore");
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336 try {
335
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337 final List<String> errors = ignore.read(ignoreFile);
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338 if (errors != null) {
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339 getContext().getLog().warn(getClass(), "Syntax errors parsing .hgignore:\n%s", errors);
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340 }
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341 } catch (IOException ex) {
335
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342 final String m = "Error reading .hgignore file";
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343 getContext().getLog().warn(getClass(), ex, m);
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344 // throw new HgInvalidControlFileException(m, ex, ignoreFile);
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345 }
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346 }
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347 return ignore;
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348 }
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349
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350 /*package-local*/ DataAccessProvider getDataAccess() {
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351 return dataAccess;
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352 }
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353
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354 /**
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355 * Perhaps, should be separate interface, like ContentLookup
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356 * path - repository storage path (i.e. one usually with .i or .d)
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357 */
202
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358 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) {
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359 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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360 RevlogStream cached = ref == null ? null : ref.get();
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361 if (cached != null) {
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362 return cached;
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363 }
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364 File f = new File(repoDir, path.toString());
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365 if (f.exists()) {
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366 RevlogStream s = new RevlogStream(dataAccess, f);
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diff changeset
367 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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368 return s;
202
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369 } else {
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370 if (shallFakeNonExistent) {
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371 try {
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372 File fake = File.createTempFile(f.getName(), null);
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373 fake.deleteOnExit();
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374 return new RevlogStream(dataAccess, fake);
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375 } catch (IOException ex) {
295
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376 getContext().getLog().info(getClass(), ex, null);
202
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377 }
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378 }
74
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379 }
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380 return null; // XXX empty stream instead?
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381 }
114
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382
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383 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) {
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384 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo));
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385 }
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386
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387 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) {
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388 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo));
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389 }
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390
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391 /*package-local*/ File getFile(HgDataFile dataFile) {
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392 return new File(getWorkingDir(), dataFile.getPath().toString());
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393 }
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394
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395 /*package-local*/ SessionContext getContext() {
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396 return sessionContext;
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397 }
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398
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399 private List<Filter> instantiateFilters(Path p, Filter.Options opts) {
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400 List<Filter.Factory> factories = impl.getFilters(this);
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401 if (factories.isEmpty()) {
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402 return Collections.emptyList();
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403 }
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404 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size());
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405 for (Filter.Factory ff : factories) {
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406 Filter f = ff.create(p, opts);
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407 if (f != null) {
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408 rv.add(f);
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409 }
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410 }
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411 return rv;
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412 }
0
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413 }