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annotate src/org/tmatesoft/hg/repo/HgRepository.java @ 227:0fd10e5016dd

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IOException on empty repository with 40-byte dirstate
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 25 May 2011 13:13:36 +0200
parents 8de327242aa0
children 1ec6b327a6ac
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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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.lang.ref.SoftReference;
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22 import java.util.ArrayList;
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23 import java.util.Collections;
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24 import java.util.HashMap;
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25 import java.util.List;
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27 import org.tmatesoft.hg.internal.ConfigFile;
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28 import org.tmatesoft.hg.internal.DataAccessProvider;
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29 import org.tmatesoft.hg.internal.Filter;
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30 import org.tmatesoft.hg.internal.RelativePathRewrite;
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31 import org.tmatesoft.hg.internal.RequiresFile;
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32 import org.tmatesoft.hg.internal.RevlogStream;
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33 import org.tmatesoft.hg.util.FileIterator;
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34 import org.tmatesoft.hg.util.FileWalker;
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35 import org.tmatesoft.hg.util.Path;
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36 import org.tmatesoft.hg.util.PathRewrite;
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37 import org.tmatesoft.hg.util.ProgressSupport;
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41 /**
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42 * Shall be as state-less as possible, all the caching happens outside the repo, in commands/walkers
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43 *
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44 * @author Artem Tikhomirov
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45 * @author TMate Software Ltd.
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46 */
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47 public final class HgRepository {
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49 // if new constants added, consider fixing HgInternals#wrongLocalRevision
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50 public static final int TIP = -3;
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51 public static final int BAD_REVISION = Integer.MIN_VALUE;
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52 public static final int WORKING_COPY = -2;
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53
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54 // temp aux marker method
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55 public static IllegalStateException notImplemented() {
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56 return new IllegalStateException("Not implemented");
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57 }
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59 private final File repoDir; // .hg folder
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60 private final String repoLocation;
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61 private final DataAccessProvider dataAccess;
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62 private final PathRewrite normalizePath;
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63 private final PathRewrite dataPathHelper;
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64 private final PathRewrite repoPathHelper;
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65
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66 private HgChangelog changelog;
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67 private HgManifest manifest;
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68 private HgTags tags;
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69 private HgBranches branches;
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71 // XXX perhaps, shall enable caching explicitly
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72 private final HashMap<Path, SoftReference<RevlogStream>> streamsCache = new HashMap<Path, SoftReference<RevlogStream>>();
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73
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74 private final org.tmatesoft.hg.internal.Internals impl = new org.tmatesoft.hg.internal.Internals();
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75 private HgIgnore ignore;
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76 private ConfigFile configFile;
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78 HgRepository(String repositoryPath) {
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79 repoDir = null;
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80 repoLocation = repositoryPath;
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81 dataAccess = null;
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82 dataPathHelper = repoPathHelper = null;
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83 normalizePath = null;
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84 }
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86 HgRepository(String repositoryPath, File repositoryRoot) {
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87 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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88 assert repositoryPath != null;
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89 assert repositoryRoot != null;
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90 repoDir = repositoryRoot;
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91 repoLocation = repositoryPath;
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92 dataAccess = new DataAccessProvider();
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93 final boolean runningOnWindows = System.getProperty("os.name").indexOf("Windows") != -1;
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94 if (runningOnWindows) {
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95 normalizePath = new PathRewrite() {
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96
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97 public String rewrite(String path) {
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98 // TODO handle . and .. (although unlikely to face them from GUI client)
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99 path = path.replace('\\', '/').replace("//", "/");
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100 if (path.startsWith("/")) {
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101 path = path.substring(1);
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102 }
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103 return path;
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104 }
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105 };
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106 } else {
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107 normalizePath = new PathRewrite.Empty(); // or strip leading slash, perhaps?
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108 }
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109 parseRequires();
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110 dataPathHelper = impl.buildDataFilesHelper();
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111 repoPathHelper = impl.buildRepositoryFilesHelper();
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112 }
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114 @Override
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115 public String toString() {
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116 return getClass().getSimpleName() + "[" + getLocation() + (isInvalid() ? "(BAD)" : "") + "]";
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117 }
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118
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119 public String getLocation() {
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120 return repoLocation;
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121 }
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122
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123 public boolean isInvalid() {
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124 return repoDir == null || !repoDir.exists() || !repoDir.isDirectory();
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125 }
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diff changeset
126
97
ee2c750b036d Changelog to HgChangelog
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127 public HgChangelog getChangelog() {
0
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128 if (this.changelog == null) {
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129 String storagePath = repoPathHelper.rewrite("00changelog.i");
202
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diff changeset
130 RevlogStream content = resolve(Path.create(storagePath), true);
97
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131 this.changelog = new HgChangelog(this, content);
0
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132 }
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133 return this.changelog;
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134 }
2
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135
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diff changeset
136 public HgManifest getManifest() {
2
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137 if (this.manifest == null) {
202
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138 RevlogStream content = resolve(Path.create(repoPathHelper.rewrite("00manifest.i")), true);
13
df8c67f3006a Basic manifest parsing to analyze what's in there
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diff changeset
139 this.manifest = new HgManifest(this, content);
2
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140 }
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141 return this.manifest;
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142 }
50
f1db8610da62 Log to consult (placeholder, for now) class to find out associated tags
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143
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144 public final HgTags getTags() {
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145 if (tags == null) {
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146 tags = new HgTags();
104
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147 try {
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148 tags.readGlobal(new File(repoDir.getParentFile(), ".hgtags"));
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149 tags.readLocal(new File(repoDir, "localtags"));
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150 } catch (IOException ex) {
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151 ex.printStackTrace(); // FIXME log or othewise report
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152 }
50
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153 }
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154 return tags;
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155 }
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156
220
8de327242aa0 Basic information about branches
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diff changeset
157 public final HgBranches getBranches() {
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158 if (branches == null) {
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diff changeset
159 branches = new HgBranches(this);
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diff changeset
160 branches.collect(ProgressSupport.Factory.get(null));
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diff changeset
161 }
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162 return branches;
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diff changeset
163 }
8de327242aa0 Basic information about branches
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diff changeset
164
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165 public HgDataFile getFileNode(String path) {
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diff changeset
166 String nPath = normalizePath.rewrite(path);
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diff changeset
167 String storagePath = dataPathHelper.rewrite(nPath);
202
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
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diff changeset
168 RevlogStream content = resolve(Path.create(storagePath), false);
115
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diff changeset
169 Path p = Path.create(nPath);
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170 if (content == null) {
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diff changeset
171 return new HgDataFile(this, p);
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172 }
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diff changeset
173 return new HgDataFile(this, p, content);
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diff changeset
174 }
1
a3576694a4d1 Repository detection from local/specified directory
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diff changeset
175
74
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diff changeset
176 public HgDataFile getFileNode(Path path) {
77
c677e1593919 Moved RevlogStream implementation into .internal
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diff changeset
177 String storagePath = dataPathHelper.rewrite(path.toString());
202
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
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diff changeset
178 RevlogStream content = resolve(Path.create(storagePath), false);
115
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diff changeset
179 // XXX no content when no file? or HgDataFile.exists() to detect that?
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diff changeset
180 if (content == null) {
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181 return new HgDataFile(this, path);
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diff changeset
182 }
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diff changeset
183 return new HgDataFile(this, path, content);
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diff changeset
184 }
2
08db726a0fb7 Shaping out low-level Hg structures
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diff changeset
185
142
37a34044e6bd More reasonable use of path normalizer and path.source
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diff changeset
186 /* clients need to rewrite path from their FS to a repository-friendly paths, and, perhaps, vice versa*/
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parents: 141
diff changeset
187 public PathRewrite getToRepoPathHelper() {
74
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diff changeset
188 return normalizePath;
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diff changeset
189 }
2
08db726a0fb7 Shaping out low-level Hg structures
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diff changeset
190
114
46291ec605a0 Filters to read and initialize according to configuration files
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diff changeset
191 // local to hide use of io.File.
74
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diff changeset
192 /*package-local*/ File getRepositoryRoot() {
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diff changeset
193 return repoDir;
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194 }
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diff changeset
195
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diff changeset
196 // 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)
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diff changeset
197 /*package-local*/ final HgDirstate loadDirstate() {
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diff changeset
198 return new HgDirstate(getDataAccess(), new File(repoDir, "dirstate"));
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diff changeset
199 }
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diff changeset
200
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
201 // package-local, see comment for loadDirstate
91
c2ce1cfaeb9e ignore file with regex and 'honest' glob support
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diff changeset
202 /*package-local*/ final HgIgnore getIgnore() {
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diff changeset
203 // TODO read config for additional locations
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diff changeset
204 if (ignore == null) {
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diff changeset
205 ignore = new HgIgnore();
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diff changeset
206 try {
c2ce1cfaeb9e ignore file with regex and 'honest' glob support
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diff changeset
207 File ignoreFile = new File(repoDir.getParentFile(), ".hgignore");
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diff changeset
208 ignore.read(ignoreFile);
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diff changeset
209 } catch (IOException ex) {
c2ce1cfaeb9e ignore file with regex and 'honest' glob support
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diff changeset
210 ex.printStackTrace(); // log warn
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diff changeset
211 }
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diff changeset
212 }
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diff changeset
213 return ignore;
74
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
214 }
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
215
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
216 /*package-local*/ DataAccessProvider getDataAccess() {
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diff changeset
217 return dataAccess;
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diff changeset
218 }
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diff changeset
219
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
220 // FIXME not sure repository shall create walkers
141
8248aae33f7d Adopt FileIterator moving towards WCStatusCollector parameterizing. Improved path handling, move 'em around
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parents: 133
diff changeset
221 /*package-local*/ FileIterator createWorkingDirWalker() {
8248aae33f7d Adopt FileIterator moving towards WCStatusCollector parameterizing. Improved path handling, move 'em around
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 133
diff changeset
222 File repoRoot = repoDir.getParentFile();
142
37a34044e6bd More reasonable use of path normalizer and path.source
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 141
diff changeset
223 Path.Source pathSrc = new Path.SimpleSource(new PathRewrite.Composite(new RelativePathRewrite(repoRoot), getToRepoPathHelper()));
141
8248aae33f7d Adopt FileIterator moving towards WCStatusCollector parameterizing. Improved path handling, move 'em around
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 133
diff changeset
224 // Impl note: simple source is enough as files in the working dir are all unique
8248aae33f7d Adopt FileIterator moving towards WCStatusCollector parameterizing. Improved path handling, move 'em around
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parents: 133
diff changeset
225 // even if they might get reused (i.e. after FileIterator#reset() and walking once again),
8248aae33f7d Adopt FileIterator moving towards WCStatusCollector parameterizing. Improved path handling, move 'em around
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parents: 133
diff changeset
226 // path caching is better to be done in the code which knows that path are being reused
8248aae33f7d Adopt FileIterator moving towards WCStatusCollector parameterizing. Improved path handling, move 'em around
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diff changeset
227 return new FileWalker(repoRoot, pathSrc);
74
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diff changeset
228 }
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
229
2
08db726a0fb7 Shaping out low-level Hg structures
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diff changeset
230 /**
08db726a0fb7 Shaping out low-level Hg structures
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diff changeset
231 * Perhaps, should be separate interface, like ContentLookup
74
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diff changeset
232 * path - repository storage path (i.e. one usually with .i or .d)
2
08db726a0fb7 Shaping out low-level Hg structures
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diff changeset
233 */
202
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
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parents: 197
diff changeset
234 /*package-local*/ RevlogStream resolve(Path path, boolean shallFakeNonExistent) {
74
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diff changeset
235 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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diff changeset
236 RevlogStream cached = ref == null ? null : ref.get();
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
237 if (cached != null) {
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
238 return cached;
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
239 }
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
240 File f = new File(repoDir, path.toString());
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diff changeset
241 if (f.exists()) {
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
242 RevlogStream s = new RevlogStream(dataAccess, f);
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
243 streamsCache.put(path, new SoftReference<RevlogStream>(s));
6f1b88693d48 Complete refactoring to org.tmatesoft
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parents: 68
diff changeset
244 return s;
202
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 197
diff changeset
245 } else {
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 197
diff changeset
246 if (shallFakeNonExistent) {
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 197
diff changeset
247 try {
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
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parents: 197
diff changeset
248 File fake = File.createTempFile(f.getName(), null);
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 197
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249 fake.deleteOnExit();
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250 return new RevlogStream(dataAccess, fake);
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251 } catch (IOException ex) {
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252 ex.printStackTrace(); // FIXME report in debug
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253 }
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254 }
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255 }
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256 return null; // XXX empty stream instead?
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257 }
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258
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259 // can't expose internal class, otherwise seems reasonable to have it in API
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260 /*package-local*/ ConfigFile getConfigFile() {
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261 if (configFile == null) {
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262 configFile = impl.newConfigFile();
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263 configFile.addLocation(new File(System.getProperty("user.home"), ".hgrc"));
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264 // last one, overrides anything else
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265 // <repo>/.hg/hgrc
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266 configFile.addLocation(new File(getRepositoryRoot(), "hgrc"));
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267 }
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268 return configFile;
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269 }
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270
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271 /*package-local*/ List<Filter> getFiltersFromRepoToWorkingDir(Path p) {
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272 return instantiateFilters(p, new Filter.Options(Filter.Direction.FromRepo));
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273 }
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274
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275 /*package-local*/ List<Filter> getFiltersFromWorkingDirToRepo(Path p) {
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276 return instantiateFilters(p, new Filter.Options(Filter.Direction.ToRepo));
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277 }
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278
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279 private List<Filter> instantiateFilters(Path p, Filter.Options opts) {
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280 List<Filter.Factory> factories = impl.getFilters(this, getConfigFile());
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281 if (factories.isEmpty()) {
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282 return Collections.emptyList();
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283 }
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284 ArrayList<Filter> rv = new ArrayList<Filter>(factories.size());
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285 for (Filter.Factory ff : factories) {
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286 Filter f = ff.create(p, opts);
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287 if (f != null) {
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288 rv.add(f);
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289 }
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290 }
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291 return rv;
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292 }
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293
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294 private void parseRequires() {
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295 new RequiresFile().parse(impl, new File(repoDir, "requires"));
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296 }
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297
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298 }