Mercurial > jhg
annotate src/org/tmatesoft/hg/internal/Internals.java @ 647:c75297c17867
Location of repository files as enumeration, use file constants instead of plain names
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Tue, 25 Jun 2013 18:53:18 +0200 (2013-06-25) |
parents | a8ce405da1f5 |
children | 46b56864b483 |
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1 /* |
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2 * Copyright (c) 2011-2013 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.internal; |
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18 |
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19 import static org.tmatesoft.hg.util.LogFacility.Severity.Error; |
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20 |
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21 import java.io.File; |
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22 import java.nio.charset.Charset; |
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23 import java.util.ArrayList; |
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24 import java.util.Arrays; |
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25 import java.util.Collections; |
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26 import java.util.Iterator; |
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27 import java.util.LinkedHashSet; |
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28 import java.util.List; |
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29 import java.util.StringTokenizer; |
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30 |
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31 import org.tmatesoft.hg.core.HgIOException; |
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32 import org.tmatesoft.hg.core.SessionContext; |
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33 import org.tmatesoft.hg.repo.HgDataFile; |
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34 import org.tmatesoft.hg.repo.HgInternals; |
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35 import org.tmatesoft.hg.repo.HgRepoConfig.ExtensionsSection; |
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36 import org.tmatesoft.hg.repo.HgRepository; |
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37 import org.tmatesoft.hg.repo.HgRepositoryFiles; |
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38 import org.tmatesoft.hg.repo.HgRepositoryLock; |
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39 import org.tmatesoft.hg.repo.HgRuntimeException; |
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40 import org.tmatesoft.hg.util.LogFacility; |
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41 import org.tmatesoft.hg.util.Path; |
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42 import org.tmatesoft.hg.util.PathRewrite; |
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43 |
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44 /** |
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45 * Fields/members that shall not be visible |
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46 * |
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47 * @author Artem Tikhomirov |
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48 * @author TMate Software Ltd. |
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49 */ |
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50 public final class Internals implements SessionContext.Source { |
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51 |
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52 /** |
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53 * Allows to specify Mercurial installation directory to detect installation-wide configurations. |
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54 * Without this property set, hg4j would attempt to deduce this value locating hg executable. |
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55 */ |
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56 public static final String CFG_PROPERTY_HG_INSTALL_ROOT = "hg4j.hg.install_root"; |
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57 |
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58 /** |
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59 * Tells repository not to cache files/revlogs |
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60 * XXX perhaps, need to respect this property not only for data files, but for manifest and changelog as well? |
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61 * (@see HgRepository#getChangelog and #getManifest()) |
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62 */ |
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63 public static final String CFG_PROPERTY_REVLOG_STREAM_CACHE = "hg4j.repo.disable_revlog_cache"; |
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64 |
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65 /** |
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66 * Name of charset to use when translating Unicode filenames to Mercurial storage paths, string, |
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67 * to resolve with {@link Charset#forName(String)}. |
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68 * E.g. <code>"cp1251"</code> or <code>"Latin-1"</code>. |
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69 * |
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70 * <p>Mercurial uses system encoding when mangling storage paths. Default value |
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71 * based on 'file.encoding' Java system property is usually fine here, however |
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72 * in certain scenarios it may be desirable to force a different one, and this |
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73 * property is exactly for this purpose. |
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74 * |
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75 * <p>E.g. Eclipse defaults to project encoding (Launch config, Common page) when launching an application, |
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76 * and if your project happen to use anything but filesystem default (say, UTF8 on cp1251 system), |
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77 * native storage paths won't match |
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78 */ |
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79 public static final String CFG_PROPERTY_FS_FILENAME_ENCODING = "hg.fs.filename.encoding"; |
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80 |
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81 /** |
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82 * Timeout, in seconds, to acquire filesystem {@link HgRepositoryLock lock}. |
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83 * |
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84 * Mercurial provides 'ui.timeout' in hgrc (defaults to 600 seconds) to specify how long |
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85 * it shall try to acquire a lock for storage or working directory prior to fail. |
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86 * |
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87 * This configuration property allows to override timeout value from Mercurial's configuration |
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88 * file and use Hg4J-specific value instead. |
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89 * |
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90 * Integer value, use negative for attempts to acquire lock until success, and zero to try once and fail immediately. |
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91 */ |
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92 public static final String CFG_PROPERTY_FS_LOCK_TIMEOUT = "hg4j.fs.lock.timeout"; |
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93 |
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94 /** |
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95 * Alternative, more effective approach to build revision text from revlog patches - collect all the |
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96 * patches one by one, starting at revision next to base, and apply against each other to get |
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97 * one final patch, which in turned is applied to base revision. |
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98 * <p> |
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99 * Original approach is to apply each patch to a previous revision, so that with base revision |
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100 * of 1M and three patches, each altering just a tiny fraction |
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101 * of the origin, with latter approach we consume 1M (original) + 1M (first patch applied) + 1M (second |
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102 * patch applied) + 1M (third patch applied). |
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103 * <p> |
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104 * Alternative approach, controlled with this option, first combines these there patches into one, |
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105 * and only then applies it to base revision, eliminating 2 intermediate elements. |
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106 * <p> |
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107 * Present default value for this option is <b>FALSE</b>, and will be changed in future, once |
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108 * tests prove support is fully functional (likely in v1.2). |
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109 * |
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110 * @since 1.1 |
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111 */ |
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112 public static final String CFG_PROPERTY_PATCH_MERGE = "hg4j.repo.merge_revlog_patches"; |
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113 |
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114 public static final int REVLOGV1_RECORD_SIZE = 64; |
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115 |
114
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116 private List<Filter.Factory> filterFactories; |
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117 private final HgRepository repo; |
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118 private final File repoDir; |
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119 private final boolean isCaseSensitiveFileSystem; |
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120 private final DataAccessProvider dataAccess; |
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121 private final ImplAccess implAccess; |
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122 |
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123 private final int requiresFlags; |
114
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124 |
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125 private final PathRewrite dataPathHelper; // access to file storage area (usually under .hg/store/data/), with filenames mangled |
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126 private final PathRewrite repoPathHelper; // access to system files (under .hg/store if requires has 'store' flag) |
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127 |
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128 private final boolean shallMergePatches; |
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129 private final RevlogStreamFactory streamProvider; |
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130 |
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131 public Internals(HgRepository hgRepo, File hgDir, ImplAccess implementationAccess) throws HgRuntimeException { |
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132 repo = hgRepo; |
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133 repoDir = hgDir; |
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134 implAccess = implementationAccess; |
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135 isCaseSensitiveFileSystem = !runningOnWindows(); |
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136 SessionContext ctx = repo.getSessionContext(); |
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137 dataAccess = new DataAccessProvider(ctx); |
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138 RepoInitializer repoInit = new RepoInitializer().initRequiresFromFile(repoDir); |
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139 requiresFlags = repoInit.getRequires(); |
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140 dataPathHelper = repoInit.buildDataFilesHelper(getSessionContext()); |
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141 repoPathHelper = repoInit.buildStoreFilesHelper(); |
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142 final PropertyMarshal pm = new PropertyMarshal(ctx); |
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143 boolean shallCacheRevlogsInRepo = pm.getBoolean(CFG_PROPERTY_REVLOG_STREAM_CACHE, true); |
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144 streamProvider = new RevlogStreamFactory(this, shallCacheRevlogsInRepo); |
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145 shallMergePatches = pm.getBoolean(Internals.CFG_PROPERTY_PATCH_MERGE, true); |
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146 } |
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147 |
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148 public boolean isInvalid() { |
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149 return !repoDir.exists() || !repoDir.isDirectory(); |
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150 } |
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151 |
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152 public File getRepositoryFile(HgRepositoryFiles f) { |
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153 switch (f.getHome()) { |
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154 case Store : return getFileFromStoreDir(f.getName()); |
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155 case Repo : return getFileFromRepoDir(f.getName()); |
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156 default : return new File(repo.getWorkingDir(), f.getName()); |
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157 } |
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158 } |
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159 |
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160 /** |
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161 * Access files under ".hg/". |
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162 * File not necessarily exists, this method is merely a factory for {@link File files} at specific, configuration-dependent location. |
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163 * |
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164 * @param name shall be normalized path |
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165 */ |
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166 public File getFileFromRepoDir(String name) { |
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167 return new File(repoDir, name); |
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168 } |
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169 |
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170 /** |
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171 * Access files under ".hg/store/" or ".hg/" depending on use of 'store' in requires. |
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172 * File not necessarily exists, this method is merely a factory for Files at specific, configuration-dependent location. |
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173 * |
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174 * @param name shall be normalized path |
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175 */ |
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176 public File getFileFromStoreDir(String name) { |
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177 CharSequence location = repoPathHelper.rewrite(name); |
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178 return new File(repoDir, location.toString()); |
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179 } |
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180 |
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181 /** |
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182 * Access files under ".hg/store/data", ".hg/store/dh/" or ".hg/data" according to settings in requires file. |
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183 * File not necessarily exists, this method is merely a factory for Files at specific, configuration-dependent location. |
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184 * |
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185 * @param name shall be normalized path, without .i or .d suffixes |
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186 */ |
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187 public File getFileFromDataDir(CharSequence path) { |
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188 CharSequence storagePath = dataPathHelper.rewrite(path); |
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189 return new File(repoDir, storagePath.toString()); |
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190 } |
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191 |
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192 public SessionContext getSessionContext() { |
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193 return repo.getSessionContext(); |
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194 } |
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195 |
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196 public LogFacility getLog() { |
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197 return getSessionContext().getLog(); |
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198 } |
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199 |
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200 public HgRepository getRepo() { |
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201 return repo; |
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202 } |
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203 |
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204 public DataAccessProvider getDataAccess() { |
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205 return dataAccess; |
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206 } |
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207 |
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208 public PathRewrite buildNormalizePathRewrite() { |
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209 if (runningOnWindows()) { |
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210 return new WinToNixPathRewrite(); |
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211 } else { |
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212 return new PathRewrite.Empty(); // or strip leading slash, perhaps? |
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213 } |
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214 } |
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215 |
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216 public List<Filter.Factory> getFilters() { |
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217 if (filterFactories == null) { |
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218 filterFactories = new ArrayList<Filter.Factory>(); |
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219 ExtensionsSection cfg = repo.getConfiguration().getExtensions(); |
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220 if (cfg.isEnabled("eol")) { |
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221 NewlineFilter.Factory ff = new NewlineFilter.Factory(); |
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222 ff.initialize(repo); |
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223 filterFactories.add(ff); |
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224 } |
331
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225 if (cfg.isEnabled("keyword")) { |
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226 KeywordFilter.Factory ff = new KeywordFilter.Factory(); |
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227 ff.initialize(repo); |
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228 filterFactories.add(ff); |
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229 } |
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230 } |
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231 return filterFactories; |
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232 } |
202
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233 |
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234 public boolean isCaseSensitiveFileSystem() { |
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235 return isCaseSensitiveFileSystem; |
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236 } |
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237 |
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238 public EncodingHelper buildFileNameEncodingHelper() { |
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239 return new EncodingHelper(getFilenameEncoding(), repo.getSessionContext()); |
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240 } |
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241 |
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242 public boolean fncacheInUse() { |
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243 return (getRequiresFlags() & RequiresFile.FNCACHE) != 0; |
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244 } |
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245 |
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246 /*package-local*/ Charset getFilenameEncoding() { |
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247 return getFileEncoding(getSessionContext()); |
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248 } |
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249 |
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250 /*package-local*/ static Charset getFileEncoding(SessionContext ctx) { |
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251 Object altEncoding = ctx.getConfigurationProperty(CFG_PROPERTY_FS_FILENAME_ENCODING, null); |
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252 Charset cs; |
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253 if (altEncoding == null) { |
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254 cs = Charset.defaultCharset(); |
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255 } else { |
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256 try { |
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257 cs = Charset.forName(altEncoding.toString()); |
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258 } catch (IllegalArgumentException ex) { |
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259 // both IllegalCharsetNameException and UnsupportedCharsetException are subclasses of IAE, too |
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260 // not severe enough to throw an exception, imo. Just record the fact it's bad ad we ignore it |
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261 ctx.getLog().dump(Internals.class, Error, ex, String.format("Bad configuration value for filename encoding %s", altEncoding)); |
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262 cs = Charset.defaultCharset(); |
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263 } |
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264 } |
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265 return cs; |
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266 } |
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267 |
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268 /** |
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269 * Access to mangled name of a file in repository storage, may come handy for debug. |
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270 * @return mangled path of the repository file |
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271 */ |
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272 public CharSequence getStoragePath(HgDataFile df) { |
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273 return dataPathHelper.rewrite(df.getPath().toString()); |
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274 } |
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275 |
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276 public int getRequiresFlags() { |
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277 return requiresFlags; |
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278 } |
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279 |
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280 boolean shallMergePatches() { |
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281 return shallMergePatches; |
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282 } |
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283 |
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284 RevlogChangeMonitor getRevlogTracker(File f) { |
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285 // TODO decide whether to use one monitor per multiple files or |
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286 // an instance per file; and let SessionContext pass alternative implementation) |
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287 return new RevlogChangeMonitor(f); |
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288 } |
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289 |
292
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290 public static boolean runningOnWindows() { |
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291 return System.getProperty("os.name").indexOf("Windows") != -1; |
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292 } |
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293 |
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294 /** |
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295 * @param fsHint optional hint pointing to filesystem of interest (generally, it's possible to mount |
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296 * filesystems with different capabilities and repository's capabilities would depend on which fs it resides) |
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297 * @return <code>true</code> if executable files deserve tailored handling |
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298 */ |
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299 public static boolean checkSupportsExecutables(File fsHint) { |
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300 // *.exe are not executables for Mercurial |
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301 return !runningOnWindows(); |
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302 } |
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303 |
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304 /** |
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305 * @param fsHint optional hint pointing to filesystem of interest (generally, it's possible to mount |
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306 * filesystems with different capabilities and repository's capabilities would depend on which fs it resides) |
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307 * @return <code>true</code> if filesystem knows what symbolic links are |
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308 */ |
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309 public static boolean checkSupportsSymlinks(File fsHint) { |
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310 // Windows supports soft symbolic links starting from Vista |
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311 // However, as of Mercurial 2.1.1, no support for this functionality |
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312 // XXX perhaps, makes sense to override with a property a) to speed up when no links are in use b) investigate how this runs windows |
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313 return !runningOnWindows(); |
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314 } |
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315 |
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316 |
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317 /** |
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318 * For Unix, returns installation root, which is the parent directory of the hg executable (or symlink) being run. |
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319 * For Windows, it's Mercurial installation directory itself |
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320 * @param ctx |
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321 */ |
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322 private static File findHgInstallRoot(SessionContext ctx) { |
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323 // let clients to override Hg install location |
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324 String p = (String) ctx.getConfigurationProperty(CFG_PROPERTY_HG_INSTALL_ROOT, null); |
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325 if (p != null) { |
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326 return new File(p); |
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327 } |
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328 StringTokenizer st = new StringTokenizer(System.getenv("PATH"), System.getProperty("path.separator"), false); |
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329 final boolean runsOnWin = runningOnWindows(); |
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330 while (st.hasMoreTokens()) { |
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331 String pe = st.nextToken(); |
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332 File execCandidate = new File(pe, runsOnWin ? "hg.exe" : "hg"); |
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333 if (execCandidate.exists() && execCandidate.isFile()) { |
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334 File execDir = execCandidate.getParentFile(); |
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335 // e.g. on Unix runs "/shared/tools/bin/hg", directory of interest is "/shared/tools/" |
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336 return runsOnWin ? execDir : execDir.getParentFile(); |
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337 } |
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338 } |
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339 return null; |
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340 } |
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341 |
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342 /** |
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343 * User-specific configuration, from system-wide and user home locations, without any repository-specific data. |
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344 * @see http://www.selenic.com/mercurial/hgrc.5.html |
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345 */ |
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346 public static ConfigFile readConfiguration(SessionContext sessionCtx) throws HgIOException { |
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347 ConfigFile configFile = new ConfigFile(sessionCtx); |
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348 File hgInstallRoot = findHgInstallRoot(sessionCtx); // may be null |
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349 // |
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350 if (runningOnWindows()) { |
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351 if (hgInstallRoot != null) { |
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352 for (File f : getWindowsConfigFilesPerInstall(hgInstallRoot)) { |
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353 configFile.addLocation(f); |
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354 } |
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355 } |
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356 LinkedHashSet<String> locations = new LinkedHashSet<String>(); |
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357 locations.add(System.getenv("USERPROFILE")); |
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358 locations.add(System.getenv("HOME")); |
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359 locations.remove(null); |
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360 for (String loc : locations) { |
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361 File location = new File(loc); |
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362 configFile.addLocation(new File(location, "Mercurial.ini")); |
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363 configFile.addLocation(new File(location, ".hgrc")); |
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364 } |
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365 } else { |
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366 if (hgInstallRoot != null) { |
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367 File d = new File(hgInstallRoot, "etc/mercurial/hgrc.d/"); |
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368 if (d.isDirectory() && d.canRead()) { |
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369 for (File f : listConfigFiles(d)) { |
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370 configFile.addLocation(f); |
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371 } |
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372 } |
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373 configFile.addLocation(new File(hgInstallRoot, "etc/mercurial/hgrc")); |
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374 } |
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375 // same, but with absolute paths |
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376 File d = new File("/etc/mercurial/hgrc.d/"); |
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377 if (d.isDirectory() && d.canRead()) { |
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378 for (File f : listConfigFiles(d)) { |
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379 configFile.addLocation(f); |
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380 } |
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381 } |
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382 configFile.addLocation(new File("/etc/mercurial/hgrc")); |
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383 configFile.addLocation(new File(System.getenv("HOME"), ".hgrc")); |
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384 } |
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385 return configFile; |
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386 } |
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387 |
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388 /** |
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389 * Repository-specific configuration |
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390 * @see http://www.selenic.com/mercurial/hgrc.5.html |
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391 */ |
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392 public ConfigFile readConfiguration() throws HgIOException { |
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393 ConfigFile configFile = readConfiguration(repo.getSessionContext()); |
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394 // last one, overrides anything else |
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395 // <repo>/.hg/hgrc |
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396 configFile.addLocation(getFileFromRepoDir("hgrc")); |
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397 return configFile; |
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398 } |
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399 |
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400 /*package-local*/ImplAccess getImplAccess() { |
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401 return implAccess; |
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402 } |
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403 |
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404 private static List<File> getWindowsConfigFilesPerInstall(File hgInstallDir) { |
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405 File f = new File(hgInstallDir, "Mercurial.ini"); |
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406 if (f.exists()) { |
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407 return Collections.singletonList(f); |
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408 } |
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409 f = new File(hgInstallDir, "hgrc.d/"); |
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410 if (f.canRead() && f.isDirectory()) { |
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411 return listConfigFiles(f); |
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412 } |
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413 // TODO [post-1.1] query registry, e.g. with |
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414 // Runtime.exec("reg query HKLM\Software\Mercurial") |
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415 // |
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416 f = new File("C:\\Mercurial\\Mercurial.ini"); |
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417 if (f.exists()) { |
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418 return Collections.singletonList(f); |
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419 } |
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420 return Collections.emptyList(); |
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421 } |
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422 |
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423 private static List<File> listConfigFiles(File dir) { |
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424 assert dir.canRead(); |
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425 assert dir.isDirectory(); |
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426 final File[] allFiles = dir.listFiles(); |
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427 // File is Comparable, lexicographically by default |
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428 Arrays.sort(allFiles); |
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429 ArrayList<File> rv = new ArrayList<File>(allFiles.length); |
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430 for (File f : allFiles) { |
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431 if (f.getName().endsWith(".rc")) { |
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432 rv.add(f); |
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433 } |
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434 } |
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435 return rv; |
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436 } |
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437 |
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438 public static File getInstallationConfigurationFileToWrite(SessionContext ctx) { |
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439 File hgInstallRoot = findHgInstallRoot(ctx); // may be null |
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440 // choice of which hgrc to pick here is according to my own pure discretion |
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441 if (hgInstallRoot != null) { |
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442 // use this location only if it's writable |
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443 File cfg = new File(hgInstallRoot, runningOnWindows() ? "Mercurial.ini" : "etc/mercurial/hgrc"); |
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444 if (cfg.canWrite() || cfg.getParentFile().canWrite()) { |
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445 return cfg; |
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446 } |
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447 } |
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448 // fallback |
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449 if (runningOnWindows()) { |
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450 if (hgInstallRoot == null) { |
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451 return new File("C:\\Mercurial\\Mercurial.ini"); |
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452 } else { |
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453 // yes, we tried this file already (above) and found it non-writable |
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454 // let caller fail with can't write |
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455 return new File(hgInstallRoot, "Mercurial.ini"); |
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456 } |
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457 } else { |
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458 return new File("/etc/mercurial/hgrc"); |
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459 } |
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460 } |
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461 |
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462 public static File getUserConfigurationFileToWrite(SessionContext ctx) { |
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463 LinkedHashSet<String> locations = new LinkedHashSet<String>(); |
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464 final boolean runsOnWindows = runningOnWindows(); |
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465 if (runsOnWindows) { |
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466 locations.add(System.getenv("USERPROFILE")); |
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467 } |
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468 locations.add(System.getenv("HOME")); |
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469 locations.remove(null); |
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470 for (String loc : locations) { |
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471 File location = new File(loc); |
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472 File rv = new File(location, ".hgrc"); |
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473 if (rv.exists() && rv.canWrite()) { |
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474 return rv; |
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475 } |
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476 if (runsOnWindows) { |
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477 rv = new File(location, "Mercurial.ini"); |
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478 if (rv.exists() && rv.canWrite()) { |
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479 return rv; |
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480 } |
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481 } |
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482 } |
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483 // fallback to default, let calling code fail with Exception if can't write |
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484 return new File(System.getProperty("user.home"), ".hgrc"); |
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485 } |
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486 |
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487 public RevlogStream createManifestStream() { |
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488 File manifestFile = getFileFromStoreDir("00manifest.i"); |
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489 return streamProvider.create(manifestFile); |
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490 } |
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491 |
591
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492 public RevlogStream createChangelogStream() { |
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493 File chlogFile = getFileFromStoreDir("00changelog.i"); |
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494 return streamProvider.create(chlogFile); |
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495 } |
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496 |
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497 public RevlogStream resolveStoreFile(Path path) { |
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498 return streamProvider.getStoreFile(path, false); |
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499 } |
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500 |
526
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501 // marker method |
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502 public static IllegalStateException notImplemented() { |
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503 return new IllegalStateException("Not implemented"); |
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504 } |
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505 |
525
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506 public static Internals getInstance(HgRepository repo) { |
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507 return HgInternals.getImplementationRepo(repo); |
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508 } |
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509 |
407
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510 public static <T> CharSequence join(Iterable<T> col, CharSequence separator) { |
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511 if (col == null) { |
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512 return String.valueOf(col); |
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513 } |
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514 Iterator<T> it = col.iterator(); |
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515 if (!it.hasNext()) { |
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516 return "[]"; |
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517 } |
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518 String v = String.valueOf(it.next()); |
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519 StringBuilder sb = new StringBuilder(v); |
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520 while (it.hasNext()) { |
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521 sb.append(separator); |
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522 v = String.valueOf(it.next()); |
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523 sb.append(v); |
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524 } |
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525 return sb; |
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526 } |
420
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527 |
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528 /** |
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529 * keep an eye on all long to int downcasts to get a chance notice the lost of data |
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530 * Use if there's even subtle chance there might be loss |
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531 * (ok not to use if there's no way for l to be greater than int) |
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532 */ |
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533 public static int ltoi(long l) { |
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534 int i = (int) l; |
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535 assert ((long) i) == l : "Loss of data!"; |
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536 return i; |
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537 } |
591
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538 |
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539 // access implementation details (fields, methods) of oth.repo package |
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540 public interface ImplAccess { |
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541 public RevlogStream getStream(HgDataFile df); |
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542 public RevlogStream getManifestStream(); |
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543 public RevlogStream getChangelogStream(); |
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544 } |
74
6f1b88693d48
Complete refactoring to org.tmatesoft
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545 } |