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annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 292:a415fe296a50

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Refactor PathRewrite to accept any char sequence, not only string
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 14 Sep 2011 02:16:19 +0200
parents 086a326f181f
children 981f9f50bb6c
rev   line source
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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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27
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28 import org.tmatesoft.hg.core.HgDataStreamException;
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29 import org.tmatesoft.hg.core.Nodeid;
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30 import org.tmatesoft.hg.internal.ByteArrayChannel;
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31 import org.tmatesoft.hg.internal.ConfigFile;
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32 import org.tmatesoft.hg.internal.DataAccessProvider;
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33 import org.tmatesoft.hg.internal.Experimental;
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34 import org.tmatesoft.hg.internal.Filter;
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35 import org.tmatesoft.hg.internal.Internals;
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36 import org.tmatesoft.hg.internal.RequiresFile;
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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#wrongLocalRevision
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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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60
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61 public static final String DEFAULT_BRANCH_NAME = "default";
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62
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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 boolean isCaseSensitiveFileSystem;
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76
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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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83
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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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86
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87 private final org.tmatesoft.hg.internal.Internals impl = new org.tmatesoft.hg.internal.Internals();
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88 private HgIgnore ignore;
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89 private ConfigFile configFile;
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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 isCaseSensitiveFileSystem = !Internals.runningOnWindows();
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99 }
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101 HgRepository(String repositoryPath, File repositoryRoot) {
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102 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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103 assert repositoryPath != null;
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104 assert repositoryRoot != null;
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105 repoDir = repositoryRoot;
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106 workingDir = repoDir.getParentFile();
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107 if (workingDir == null) {
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108 throw new IllegalArgumentException(repoDir.toString());
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109 }
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110 repoLocation = repositoryPath;
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111 dataAccess = new DataAccessProvider();
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112 final boolean runningOnWindows = Internals.runningOnWindows();
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113 isCaseSensitiveFileSystem = !runningOnWindows;
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114 if (runningOnWindows) {
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115 normalizePath = new PathRewrite() {
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116
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117 public CharSequence rewrite(CharSequence p) {
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118 // TODO handle . and .. (although unlikely to face them from GUI client)
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119 String path = p.toString();
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120 path = path.replace('\\', '/').replace("//", "/");
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121 if (path.startsWith("/")) {
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122 path = path.substring(1);
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123 }
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124 return path;
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125 }
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126 };
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diff changeset
127 } else {
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128 normalizePath = new PathRewrite.Empty(); // or strip leading slash, perhaps?
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129 }
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diff changeset
130 parseRequires();
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131 dataPathHelper = impl.buildDataFilesHelper();
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132 repoPathHelper = impl.buildRepositoryFilesHelper();
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133 }
0
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134
145
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135 @Override
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136 public String toString() {
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137 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]";
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138 }
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139
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140 public String getLocation() {
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141 return repoLocation;
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142 }
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143
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144 public boolean isInvalid() {
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145 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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146 }
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147
97
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148 public HgChangelog getChangelog() {
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149 if (this.changelog == null) {
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150 CharSequence storagePath = repoPathHelper.rewrite("00changelog.i");
202
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151 RevlogStream content = resolve(Path.create(storagePath), true);
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152 this.changelog = new HgChangelog(this, content);
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153 }
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154 return this.changelog;
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155 }
2
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156
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diff changeset
157 public HgManifest getManifest() {
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158 if (this.manifest == null) {
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159 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true);
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160 this.manifest = new HgManifest(this, content);
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161 }
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162 return this.manifest;
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163 }
50
f1db8610da62 Log to consult (placeholder, for now) class to find out associated tags
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164
231
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165 public HgTags getTags() {
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166 if (tags == null) {
234
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diff changeset
167 tags = new HgTags(this);
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168 try {
234
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diff changeset
169 HgDataFile hgTags = getFileNode(".hgtags");
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diff changeset
170 if (hgTags.exists()) {
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171 for (int i = 0; i <= hgTags.getLastRevision(); i++) { // FIXME in fact, would be handy to have walk(start,end)
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diff changeset
172 // method for data files as well, though it looks odd.
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diff changeset
173 try {
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diff changeset
174 ByteArrayChannel sink = new ByteArrayChannel();
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diff changeset
175 hgTags.content(i, sink);
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diff changeset
176 final String content = new String(sink.toArray(), "UTF8");
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diff changeset
177 tags.readGlobal(new StringReader(content));
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diff changeset
178 } catch (CancelledException ex) {
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diff changeset
179 ex.printStackTrace(); // IGNORE, can't happen, we did not configure cancellation
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diff changeset
180 } catch (HgDataStreamException ex) {
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diff changeset
181 ex.printStackTrace(); // FIXME need to react
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diff changeset
182 } catch (IOException ex) {
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diff changeset
183 // UnsupportedEncodingException can't happen (UTF8)
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diff changeset
184 // only from readGlobal. Need to reconsider exceptions thrown from there
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diff changeset
185 ex.printStackTrace(); // XXX need to decide what to do this. failure to read single revision shall not break complete cycle
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diff changeset
186 }
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diff changeset
187 }
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diff changeset
188 }
252
a6d19adc2636 HgRepository.getWorkingCopyBranchName() to retrieve branch associated with working directory
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diff changeset
189 tags.readGlobal(new File(getWorkingDir(), ".hgtags")); // XXX replace with HgDataFile.workingCopy
104
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diff changeset
190 tags.readLocal(new File(repoDir, "localtags"));
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diff changeset
191 } catch (IOException ex) {
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diff changeset
192 ex.printStackTrace(); // FIXME log or othewise report
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diff changeset
193 }
50
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194 }
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195 return tags;
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196 }
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diff changeset
197
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diff changeset
198 public HgBranches getBranches() {
220
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199 if (branches == null) {
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200 branches = new HgBranches(this);
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201 branches.collect(ProgressSupport.Factory.get(null));
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diff changeset
202 }
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203 return branches;
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diff changeset
204 }
231
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diff changeset
205
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diff changeset
206 @Experimental(reason="Perhaps, shall not cache instance, and provide loadMergeState as it may change often")
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diff changeset
207 public HgMergeState getMergeState() {
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diff changeset
208 if (mergeState == null) {
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diff changeset
209 mergeState = new HgMergeState(this);
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diff changeset
210 }
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diff changeset
211 return mergeState;
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diff changeset
212 }
220
8de327242aa0 Basic information about branches
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diff changeset
213
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diff changeset
214 public HgDataFile getFileNode(String path) {
292
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diff changeset
215 CharSequence nPath = normalizePath.rewrite(path);
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diff changeset
216 CharSequence storagePath = dataPathHelper.rewrite(nPath);
202
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diff changeset
217 RevlogStream content = resolve(Path.create(storagePath), false);
115
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diff changeset
218 Path p = Path.create(nPath);
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diff changeset
219 if (content == null) {
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diff changeset
220 return new HgDataFile(this, p);
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diff changeset
221 }
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diff changeset
222 return new HgDataFile(this, p, content);
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diff changeset
223 }
1
a3576694a4d1 Repository detection from local/specified directory
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diff changeset
224
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diff changeset
225 public HgDataFile getFileNode(Path path) {
292
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diff changeset
226 CharSequence storagePath = dataPathHelper.rewrite(path.toString());
202
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diff changeset
227 RevlogStream content = resolve(Path.create(storagePath), false);
115
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diff changeset
228 // XXX no content when no file? or HgDataFile.exists() to detect that?
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diff changeset
229 if (content == null) {
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diff changeset
230 return new HgDataFile(this, path);
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diff changeset
231 }
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diff changeset
232 return new HgDataFile(this, path, content);
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diff changeset
233 }
2
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diff changeset
234
142
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diff changeset
235 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/
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diff changeset
236 public PathRewrite getToRepoPathHelper() {
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diff changeset
237 return normalizePath;
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diff changeset
238 }
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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diff changeset
239
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diff changeset
240 /**
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diff changeset
241 * @return pair of values, {@link Pair#first()} and {@link Pair#second()} are respective parents, never <code>null</code>.
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242 */
235
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243 public Pair<Nodeid,Nodeid> getWorkingCopyParents() {
284
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244 return HgDirstate.readParents(this, new File(repoDir, "dirstate"));
235
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245 }
252
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246
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247 /**
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248 * @return name of the branch associated with working directory, never <code>null</code>.
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249 */
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250 public String getWorkingCopyBranchName() {
284
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251 return HgDirstate.readBranch(this);
252
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252 }
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253
237
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254 /**
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255 * @return location where user files (shall) reside
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256 */
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257 public File getWorkingDir() {
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258 return workingDir;
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259 }
239
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260
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261 /**
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262 * Provides access to sub-repositories defined in this repository. Enumerated sub-repositories are those directly
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263 * known, not recursive collection of all nested sub-repositories.
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264 * @return list of all known sub-repositories in this repository, or empty list if none found.
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265 */
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266 public List<HgSubrepoLocation> getSubrepositories() {
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267 if (subRepos == null) {
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268 subRepos = new SubrepoManager(this);
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269 }
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270 return subRepos.all();
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271 }
237
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272
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273 // shall be of use only for internal classes
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274 /*package-local*/ File getRepositoryRoot() {
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275 return repoDir;
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276 }
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277
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278 // 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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279 // XXX consider passing Path pool or factory to produce (shared) Path instead of Strings
284
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280 /*package-local*/ final HgDirstate loadDirstate(PathPool pathPool) {
292
a415fe296a50 Refactor PathRewrite to accept any char sequence, not only string
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281 PathRewrite canonicalPath = null;
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282 if (!isCaseSensitiveFileSystem) {
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283 canonicalPath = new PathRewrite() {
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284
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285 public CharSequence rewrite(CharSequence path) {
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286 return path.toString().toLowerCase();
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287 }
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288 };
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289 }
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290 return new HgDirstate(this, new File(repoDir, "dirstate"), pathPool, canonicalPath);
74
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291 }
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292
289
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293 /**
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294 * Access to configured set of ignored files.
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295 * @see HgIgnore#isIgnored(Path)
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296 */
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297 public HgIgnore getIgnore() {
91
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298 // TODO read config for additional locations
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299 if (ignore == null) {
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300 ignore = new HgIgnore();
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301 try {
252
a6d19adc2636 HgRepository.getWorkingCopyBranchName() to retrieve branch associated with working directory
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302 File ignoreFile = new File(getWorkingDir(), ".hgignore");
91
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303 ignore.read(ignoreFile);
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304 } catch (IOException ex) {
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305 ex.printStackTrace(); // log warn
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306 }
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307 }
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308 return ignore;
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309 }
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310
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311 /*package-local*/ DataAccessProvider getDataAccess() {
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312 return dataAccess;
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313 }
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314
2
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diff changeset
315 /**
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316 * Perhaps, should be separate interface, like ContentLookup
74
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317 * path - repository storage path (i.e. one usually with .i or .d)
2
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318 */
202
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319 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) {
74
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diff changeset
320 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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diff changeset
321 RevlogStream cached = ref == null ? null : ref.get();
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322 if (cached != null) {
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323 return cached;
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324 }
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diff changeset
325 File f = new File(repoDir, path.toString());
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diff changeset
326 if (f.exists()) {
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diff changeset
327 RevlogStream s = new RevlogStream(dataAccess, f);
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diff changeset
328 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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diff changeset
329 return s;
202
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diff changeset
330 } else {
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diff changeset
331 if (shallFakeNonExistent) {
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diff changeset
332 try {
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diff changeset
333 File fake = File.createTempFile(f.getName(), null);
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diff changeset
334 fake.deleteOnExit();
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335 return new RevlogStream(dataAccess, fake);
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diff changeset
336 } catch (IOException ex) {
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337 ex.printStackTrace(); // FIXME report in debug
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338 }
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339 }
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340 }
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341 return null; // XXX empty stream instead?
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342 }
114
46291ec605a0 Filters to read and initialize according to configuration files
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343
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344 // can't expose internal class, otherwise seems reasonable to have it in API
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345 /*package-local*/ ConfigFile getConfigFile() {
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346 if (configFile == null) {
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347 configFile = impl.newConfigFile();
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348 configFile.addLocation(new File(System.getProperty("user.home"), ".hgrc"));
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349 // last one, overrides anything else
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350 // <repo>/.hg/hgrc
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diff changeset
351 configFile.addLocation(new File(getRepositoryRoot(), "hgrc"));
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352 }
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353 return configFile;
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354 }
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diff changeset
355
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356 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) {
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357 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo));
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358 }
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diff changeset
359
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360 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) {
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diff changeset
361 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo));
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diff changeset
362 }
237
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diff changeset
363
6e1373b54e9b Allow access to working copy content through HgDataFile. Give access to repository's working dir
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364 /*package-local*/ File getFile(HgDataFile dataFile) {
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365 return new File(getWorkingDir(), dataFile.getPath().toString());
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366 }
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367
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368 private List<Filter> instantiateFilters(Path p, Filter.Options opts) {
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369 List<Filter.Factory> factories = impl.getFilters(this, getConfigFile());
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370 if (factories.isEmpty()) {
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371 return Collections.emptyList();
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372 }
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373 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size());
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374 for (Filter.Factory ff : factories) {
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375 Filter f = ff.create(p, opts);
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376 if (f != null) {
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377 rv.add(f);
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378 }
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379 }
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380 return rv;
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381 }
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382
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383 private void parseRequires() {
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384 new RequiresFile().parse(impl, new File(repoDir, "requires"));
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385 }
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386
0
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387 }