Mercurial > jhg
annotate src/org/tmatesoft/hg/internal/Internals.java @ 503:0bd2d0441d8f
Add lookup of remote paths from repository's .hg/hgrc, respect default (origin)
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Wed, 31 Oct 2012 15:17:21 +0100 |
parents | d2f6ab541330 |
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1 /* |
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2 * Copyright (c) 2011-2012 TMate Software Ltd |
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3 * |
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4 * This program is free software; you can redistribute it and/or modify |
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5 * it under the terms of the GNU General Public License as published by |
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6 * the Free Software Foundation; version 2 of the License. |
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7 * |
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8 * This program is distributed in the hope that it will be useful, |
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 * GNU General Public License for more details. |
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12 * |
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13 * For information on how to redistribute this software under |
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14 * the terms of a license other than GNU General Public License |
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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.io.IOException; |
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23 import java.nio.charset.Charset; |
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24 import java.util.ArrayList; |
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25 import java.util.Arrays; |
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26 import java.util.Collections; |
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27 import java.util.Iterator; |
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28 import java.util.LinkedHashSet; |
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29 import java.util.List; |
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30 import java.util.StringTokenizer; |
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31 |
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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.HgRuntimeException; |
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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.util.PathRewrite; |
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38 |
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39 /** |
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40 * Fields/members that shall not be visible |
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41 * |
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42 * @author Artem Tikhomirov |
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43 * @author TMate Software Ltd. |
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44 */ |
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45 public final class Internals implements SessionContext.Source { |
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46 |
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47 /** |
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48 * Allows to specify Mercurial installation directory to detect installation-wide configurations. |
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49 * Without this property set, hg4j would attempt to deduce this value locating hg executable. |
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50 */ |
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51 public static final String CFG_PROPERTY_HG_INSTALL_ROOT = "hg4j.hg.install_root"; |
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52 |
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53 /** |
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54 * Tells repository not to cache files/revlogs |
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55 * XXX perhaps, need to respect this property not only for data files, but for manifest and changelog as well? |
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56 * (@see HgRepository#getChangelog and #getManifest()) |
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57 */ |
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58 public static final String CFG_PROPERTY_REVLOG_STREAM_CACHE = "hg4j.repo.disable_revlog_cache"; |
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59 |
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60 /** |
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61 * Name of charset to use when translating Unicode filenames to Mercurial storage paths, string, |
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62 * to resolve with {@link Charset#forName(String)}. |
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63 * E.g. <code>"cp1251"</code> or <code>"Latin-1"</code>. |
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64 * |
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65 * <p>Mercurial uses system encoding when mangling storage paths. Default value |
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66 * based on 'file.encoding' Java system property is usually fine here, however |
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67 * in certain scenarios it may be desirable to force a different one, and this |
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68 * property is exactly for this purpose. |
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69 * |
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70 * <p>E.g. Eclipse defaults to project encoding (Launch config, Common page) when launching an application, |
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71 * and if your project happen to use anything but filesystem default (say, UTF8 on cp1251 system), |
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72 * native storage paths won't match |
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73 */ |
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74 public static final String CFG_PROPERTY_FS_FILENAME_ENCODING = "hg.fs.filename.encoding"; |
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75 |
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76 private List<Filter.Factory> filterFactories; |
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77 private final HgRepository repo; |
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78 private final File repoDir; |
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79 private final boolean isCaseSensitiveFileSystem; |
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80 private final boolean shallCacheRevlogsInRepo; |
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81 private final DataAccessProvider dataAccess; |
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82 |
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83 @SuppressWarnings("unused") |
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84 private final int requiresFlags; |
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85 |
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86 private final PathRewrite dataPathHelper; // access to file storage area (usually under .hg/store/data/), with filenames mangled |
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87 private final PathRewrite repoPathHelper; // access to system files (under .hg/store if requires has 'store' flag) |
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88 |
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89 public Internals(HgRepository hgRepo, File hgDir) throws HgRuntimeException { |
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90 repo = hgRepo; |
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91 repoDir = hgDir; |
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92 isCaseSensitiveFileSystem = !runningOnWindows(); |
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93 SessionContext ctx = repo.getSessionContext(); |
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94 shallCacheRevlogsInRepo = new PropertyMarshal(ctx).getBoolean(CFG_PROPERTY_REVLOG_STREAM_CACHE, true); |
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95 dataAccess = new DataAccessProvider(ctx); |
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96 RepoInitializer repoInit = new RepoInitializer().initRequiresFromFile(repoDir); |
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97 requiresFlags = repoInit.getRequires(); |
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98 dataPathHelper = repoInit.buildDataFilesHelper(getSessionContext()); |
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99 repoPathHelper = repoInit.buildStoreFilesHelper(); |
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100 } |
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101 |
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102 public boolean isInvalid() { |
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103 return !repoDir.exists() || !repoDir.isDirectory(); |
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104 } |
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105 |
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106 /** |
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107 * Access files under ".hg/". |
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108 * File not necessarily exists, this method is merely a factory for Files at specific, configuration-dependent location. |
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109 * |
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110 * @param name shall be normalized path |
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111 */ |
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112 public File getFileFromRepoDir(String name) { |
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113 return new File(repoDir, name); |
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114 } |
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115 |
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116 /** |
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117 * Access files under ".hg/store/" or ".hg/" depending on use of 'store' in requires. |
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118 * File not necessarily exists, this method is merely a factory for Files at specific, configuration-dependent location. |
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119 * |
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120 * @param name shall be normalized path |
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121 */ |
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122 public File getFileFromStoreDir(String name) { |
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123 CharSequence location = repoPathHelper.rewrite(name); |
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124 return new File(repoDir, location.toString()); |
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125 } |
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126 |
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127 /** |
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128 * Access files under ".hg/store/data", ".hg/store/dh/" or ".hg/data" according to settings in requires file. |
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129 * File not necessarily exists, this method is merely a factory for Files at specific, configuration-dependent location. |
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130 * |
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131 * @param name shall be normalized path, without .i or .d suffixes |
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132 */ |
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133 public File getFileFromDataDir(CharSequence path) { |
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134 CharSequence storagePath = dataPathHelper.rewrite(path); |
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135 return new File(repoDir, storagePath.toString()); |
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136 } |
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137 |
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138 public SessionContext getSessionContext() { |
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139 return repo.getSessionContext(); |
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140 } |
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141 |
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142 public HgRepository getRepo() { |
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143 return repo; |
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144 } |
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145 |
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146 public DataAccessProvider getDataAccess() { |
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147 return dataAccess; |
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148 } |
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149 |
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150 public PathRewrite buildNormalizePathRewrite() { |
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151 if (runningOnWindows()) { |
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152 return new WinToNixPathRewrite(); |
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153 } else { |
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154 return new PathRewrite.Empty(); // or strip leading slash, perhaps? |
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155 } |
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156 } |
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157 |
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158 public List<Filter.Factory> getFilters() { |
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159 if (filterFactories == null) { |
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160 filterFactories = new ArrayList<Filter.Factory>(); |
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161 ExtensionsSection cfg = repo.getConfiguration().getExtensions(); |
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162 if (cfg.isEnabled("eol")) { |
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163 NewlineFilter.Factory ff = new NewlineFilter.Factory(); |
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164 ff.initialize(repo); |
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165 filterFactories.add(ff); |
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166 } |
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167 if (cfg.isEnabled("keyword")) { |
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168 KeywordFilter.Factory ff = new KeywordFilter.Factory(); |
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169 ff.initialize(repo); |
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170 filterFactories.add(ff); |
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171 } |
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172 } |
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173 return filterFactories; |
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174 } |
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175 |
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176 public boolean isCaseSensitiveFileSystem() { |
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177 return isCaseSensitiveFileSystem; |
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178 } |
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179 |
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180 public EncodingHelper buildFileNameEncodingHelper() { |
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181 SessionContext ctx = repo.getSessionContext(); |
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182 return new EncodingHelper(getFileEncoding(ctx), ctx); |
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183 } |
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184 |
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185 /*package-local*/ static Charset getFileEncoding(SessionContext ctx) { |
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186 Object altEncoding = ctx.getConfigurationProperty(CFG_PROPERTY_FS_FILENAME_ENCODING, null); |
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187 Charset cs; |
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188 if (altEncoding == null) { |
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189 cs = Charset.defaultCharset(); |
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190 } else { |
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191 try { |
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192 cs = Charset.forName(altEncoding.toString()); |
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193 } catch (IllegalArgumentException ex) { |
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194 // both IllegalCharsetNameException and UnsupportedCharsetException are subclasses of IAE, too |
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195 // not severe enough to throw an exception, imo. Just record the fact it's bad ad we ignore it |
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196 ctx.getLog().dump(Internals.class, Error, ex, String.format("Bad configuration value for filename encoding %s", altEncoding)); |
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197 cs = Charset.defaultCharset(); |
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198 } |
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199 } |
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200 return cs; |
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201 } |
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202 |
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203 /** |
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204 * Access to mangled name of a file in repository storage, may come handy for debug. |
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205 * @return mangled path of the repository file |
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206 */ |
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207 public CharSequence getStoragePath(HgDataFile df) { |
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208 return dataPathHelper.rewrite(df.getPath().toString()); |
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209 } |
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210 |
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211 |
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212 public static boolean runningOnWindows() { |
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213 return System.getProperty("os.name").indexOf("Windows") != -1; |
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214 } |
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215 |
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216 /** |
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217 * @param fsHint optional hint pointing to filesystem of interest (generally, it's possible to mount |
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218 * filesystems with different capabilities and repository's capabilities would depend on which fs it resides) |
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219 * @return <code>true</code> if executable files deserve tailored handling |
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220 */ |
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221 public static boolean checkSupportsExecutables(File fsHint) { |
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222 // *.exe are not executables for Mercurial |
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223 return !runningOnWindows(); |
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224 } |
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225 |
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226 /** |
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227 * @param fsHint optional hint pointing to filesystem of interest (generally, it's possible to mount |
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228 * filesystems with different capabilities and repository's capabilities would depend on which fs it resides) |
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229 * @return <code>true</code> if filesystem knows what symbolic links are |
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230 */ |
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231 public static boolean checkSupportsSymlinks(File fsHint) { |
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232 // Windows supports soft symbolic links starting from Vista |
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233 // However, as of Mercurial 2.1.1, no support for this functionality |
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234 // 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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235 return !runningOnWindows(); |
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236 } |
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237 |
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238 |
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239 /** |
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240 * For Unix, returns installation root, which is the parent directory of the hg executable (or symlink) being run. |
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241 * For Windows, it's Mercurial installation directory itself |
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242 * @param ctx |
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243 */ |
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244 private static File findHgInstallRoot(SessionContext ctx) { |
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245 // let clients to override Hg install location |
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246 String p = (String) ctx.getConfigurationProperty(CFG_PROPERTY_HG_INSTALL_ROOT, null); |
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247 if (p != null) { |
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248 return new File(p); |
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249 } |
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250 StringTokenizer st = new StringTokenizer(System.getenv("PATH"), System.getProperty("path.separator"), false); |
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251 final boolean runsOnWin = runningOnWindows(); |
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252 while (st.hasMoreTokens()) { |
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253 String pe = st.nextToken(); |
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254 File execCandidate = new File(pe, runsOnWin ? "hg.exe" : "hg"); |
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255 if (execCandidate.exists() && execCandidate.isFile()) { |
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256 File execDir = execCandidate.getParentFile(); |
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257 // e.g. on Unix runs "/shared/tools/bin/hg", directory of interest is "/shared/tools/" |
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258 return runsOnWin ? execDir : execDir.getParentFile(); |
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259 } |
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260 } |
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261 return null; |
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262 } |
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263 |
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264 /** |
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265 * @see http://www.selenic.com/mercurial/hgrc.5.html |
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266 */ |
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267 public ConfigFile readConfiguration() throws IOException { |
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268 SessionContext sessionCtx = repo.getSessionContext(); |
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269 ConfigFile configFile = new ConfigFile(sessionCtx); |
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270 File hgInstallRoot = findHgInstallRoot(sessionCtx); // may be null |
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271 // |
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272 if (runningOnWindows()) { |
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273 if (hgInstallRoot != null) { |
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274 for (File f : getWindowsConfigFilesPerInstall(hgInstallRoot)) { |
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275 configFile.addLocation(f); |
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276 } |
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277 } |
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278 LinkedHashSet<String> locations = new LinkedHashSet<String>(); |
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279 locations.add(System.getenv("USERPROFILE")); |
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280 locations.add(System.getenv("HOME")); |
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281 locations.remove(null); |
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282 for (String loc : locations) { |
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283 File location = new File(loc); |
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284 configFile.addLocation(new File(location, "Mercurial.ini")); |
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285 configFile.addLocation(new File(location, ".hgrc")); |
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286 } |
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287 } else { |
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288 if (hgInstallRoot != null) { |
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289 File d = new File(hgInstallRoot, "etc/mercurial/hgrc.d/"); |
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290 if (d.isDirectory() && d.canRead()) { |
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291 for (File f : listConfigFiles(d)) { |
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292 configFile.addLocation(f); |
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293 } |
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294 } |
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295 configFile.addLocation(new File(hgInstallRoot, "etc/mercurial/hgrc")); |
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296 } |
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297 // same, but with absolute paths |
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298 File d = new File("/etc/mercurial/hgrc.d/"); |
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299 if (d.isDirectory() && d.canRead()) { |
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300 for (File f : listConfigFiles(d)) { |
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301 configFile.addLocation(f); |
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302 } |
351
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303 } |
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304 configFile.addLocation(new File("/etc/mercurial/hgrc")); |
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305 configFile.addLocation(new File(System.getenv("HOME"), ".hgrc")); |
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306 } |
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307 // last one, overrides anything else |
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308 // <repo>/.hg/hgrc |
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309 configFile.addLocation(getFileFromRepoDir("hgrc")); |
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310 return configFile; |
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311 } |
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312 |
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313 private static List<File> getWindowsConfigFilesPerInstall(File hgInstallDir) { |
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314 File f = new File(hgInstallDir, "Mercurial.ini"); |
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315 if (f.exists()) { |
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316 return Collections.singletonList(f); |
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317 } |
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318 f = new File(hgInstallDir, "hgrc.d/"); |
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319 if (f.canRead() && f.isDirectory()) { |
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320 return listConfigFiles(f); |
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321 } |
418
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322 // TODO post-1.0 query registry, e.g. with |
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323 // Runtime.exec("reg query HKLM\Software\Mercurial") |
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324 // |
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325 f = new File("C:\\Mercurial\\Mercurial.ini"); |
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326 if (f.exists()) { |
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327 return Collections.singletonList(f); |
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328 } |
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329 return Collections.emptyList(); |
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330 } |
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331 |
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332 private static List<File> listConfigFiles(File dir) { |
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333 assert dir.canRead(); |
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334 assert dir.isDirectory(); |
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335 final File[] allFiles = dir.listFiles(); |
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336 // File is Comparable, lexicographically by default |
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337 Arrays.sort(allFiles); |
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338 ArrayList<File> rv = new ArrayList<File>(allFiles.length); |
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339 for (File f : allFiles) { |
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340 if (f.getName().endsWith(".rc")) { |
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341 rv.add(f); |
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342 } |
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343 } |
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344 return rv; |
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345 } |
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346 |
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347 public static File getInstallationConfigurationFileToWrite(SessionContext ctx) { |
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348 File hgInstallRoot = findHgInstallRoot(ctx); // may be null |
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349 // choice of which hgrc to pick here is according to my own pure discretion |
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350 if (hgInstallRoot != null) { |
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351 // use this location only if it's writable |
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352 File cfg = new File(hgInstallRoot, runningOnWindows() ? "Mercurial.ini" : "etc/mercurial/hgrc"); |
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353 if (cfg.canWrite() || cfg.getParentFile().canWrite()) { |
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354 return cfg; |
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355 } |
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356 } |
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357 // fallback |
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358 if (runningOnWindows()) { |
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359 if (hgInstallRoot == null) { |
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360 return new File("C:\\Mercurial\\Mercurial.ini"); |
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361 } else { |
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362 // yes, we tried this file already (above) and found it non-writable |
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363 // let caller fail with can't write |
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364 return new File(hgInstallRoot, "Mercurial.ini"); |
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365 } |
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366 } else { |
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367 return new File("/etc/mercurial/hgrc"); |
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368 } |
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369 } |
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370 |
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371 public static File getUserConfigurationFileToWrite(SessionContext ctx) { |
379
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372 LinkedHashSet<String> locations = new LinkedHashSet<String>(); |
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373 final boolean runsOnWindows = runningOnWindows(); |
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374 if (runsOnWindows) { |
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375 locations.add(System.getenv("USERPROFILE")); |
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376 } |
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377 locations.add(System.getenv("HOME")); |
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378 locations.remove(null); |
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379 for (String loc : locations) { |
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380 File location = new File(loc); |
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381 File rv = new File(location, ".hgrc"); |
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382 if (rv.exists() && rv.canWrite()) { |
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383 return rv; |
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384 } |
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385 if (runsOnWindows) { |
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386 rv = new File(location, "Mercurial.ini"); |
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387 if (rv.exists() && rv.canWrite()) { |
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388 return rv; |
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389 } |
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390 } |
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391 } |
379
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392 // fallback to default, let calling code fail with Exception if can't write |
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393 return new File(System.getProperty("user.home"), ".hgrc"); |
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394 } |
388
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Work on FIXME: correct HgDataFile#workingCopy with tests; BasicSessionContext with property override; platform-specific options to internals
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395 |
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396 public boolean shallCacheRevlogs() { |
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397 return shallCacheRevlogsInRepo; |
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398 } |
407
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399 |
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400 public static <T> CharSequence join(Iterable<T> col, CharSequence separator) { |
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401 if (col == null) { |
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402 return String.valueOf(col); |
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403 } |
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404 Iterator<T> it = col.iterator(); |
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405 if (!it.hasNext()) { |
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406 return "[]"; |
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407 } |
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408 String v = String.valueOf(it.next()); |
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409 StringBuilder sb = new StringBuilder(v); |
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410 while (it.hasNext()) { |
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411 sb.append(separator); |
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412 v = String.valueOf(it.next()); |
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413 sb.append(v); |
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414 } |
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415 return sb; |
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416 } |
420
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417 |
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418 /** |
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419 * keep an eye on all long to int downcasts to get a chance notice the lost of data |
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420 * Use if there's even subtle chance there might be loss |
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421 * (ok not to use if there's no way for l to be greater than int) |
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422 */ |
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423 public static int ltoi(long l) { |
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424 int i = (int) l; |
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425 assert ((long) i) == l : "Loss of data!"; |
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426 return i; |
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427 } |
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428 } |