Mercurial > jhg
annotate src/org/tmatesoft/hg/internal/Internals.java @ 482:6c67debed07e
Distinguish files in wc from files under repo root, use these constants
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Tue, 07 Aug 2012 14:27:13 +0200 |
parents | 909306e412e2 |
children | e31e85cf4d4c |
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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.internal.RequiresFile.*; |
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20 import static org.tmatesoft.hg.util.LogFacility.Severity.Error; |
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21 |
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22 import java.io.File; |
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23 import java.io.FileOutputStream; |
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24 import java.io.IOException; |
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25 import java.nio.charset.Charset; |
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26 import java.util.ArrayList; |
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27 import java.util.Arrays; |
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28 import java.util.Collections; |
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29 import java.util.Iterator; |
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30 import java.util.LinkedHashSet; |
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31 import java.util.List; |
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32 import java.util.StringTokenizer; |
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33 |
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34 import org.tmatesoft.hg.core.SessionContext; |
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35 import org.tmatesoft.hg.repo.HgInternals; |
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36 import org.tmatesoft.hg.repo.HgInvalidControlFileException; |
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37 import org.tmatesoft.hg.repo.HgRepoConfig.ExtensionsSection; |
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38 import org.tmatesoft.hg.repo.HgRepository; |
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39 import org.tmatesoft.hg.util.PathRewrite; |
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40 |
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41 /** |
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42 * Fields/members that shall not be visible |
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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 Internals { |
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48 |
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49 /** |
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50 * Allows to specify Mercurial installation directory to detect installation-wide configurations. |
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51 * Without this property set, hg4j would attempt to deduce this value locating hg executable. |
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52 */ |
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53 public static final String CFG_PROPERTY_HG_INSTALL_ROOT = "hg4j.hg.install_root"; |
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54 |
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55 /** |
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56 * Tells repository not to cache files/revlogs |
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57 * XXX perhaps, need to respect this property not only for data files, but for manifest and changelog as well? |
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58 * (@see HgRepository#getChangelog and #getManifest()) |
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59 */ |
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60 public static final String CFG_PROPERTY_REVLOG_STREAM_CACHE = "hg4j.repo.disable_revlog_cache"; |
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61 |
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62 /** |
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63 * Name of charset to use when translating Unicode filenames to Mercurial storage paths, string, |
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64 * to resolve with {@link Charset#forName(String)}. |
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65 * E.g. <code>"cp1251"</code> or <code>"Latin-1"</code>. |
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66 * |
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67 * <p>Mercurial uses system encoding when mangling storage paths. Default value |
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68 * based on 'file.encoding' Java system property is usually fine here, however |
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69 * in certain scenarios it may be desirable to force a different one, and this |
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70 * property is exactly for this purpose. |
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71 * |
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72 * <p>E.g. Eclipse defaults to project encoding (Launch config, Common page) when launching an application, |
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73 * and if your project happen to use anything but filesystem default (say, UTF8 on cp1251 system), |
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74 * native storage paths won't match |
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75 */ |
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76 public static final String CFG_PROPERTY_FS_FILENAME_ENCODING = "hg.fs.filename.encoding"; |
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77 |
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78 private int requiresFlags = 0; |
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79 private List<Filter.Factory> filterFactories; |
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80 private final SessionContext sessionContext; |
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81 private final boolean isCaseSensitiveFileSystem; |
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82 private final boolean shallCacheRevlogsInRepo; |
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83 |
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84 public Internals(SessionContext ctx) { |
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85 sessionContext = ctx; |
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86 isCaseSensitiveFileSystem = !runningOnWindows(); |
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87 shallCacheRevlogsInRepo = new PropertyMarshal(ctx).getBoolean(CFG_PROPERTY_REVLOG_STREAM_CACHE, true); |
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88 } |
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89 |
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90 public void parseRequires(HgRepository hgRepo, File requiresFile) throws HgInvalidControlFileException { |
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91 try { |
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92 new RequiresFile().parse(this, requiresFile); |
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93 } catch (IOException ex) { |
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94 throw new HgInvalidControlFileException("Parse failed", ex, requiresFile); |
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95 } |
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96 } |
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97 |
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98 public/*for tests, otherwise pkg*/ void setStorageConfig(int version, int flags) { |
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99 requiresFlags = flags; |
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100 } |
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101 |
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102 public PathRewrite buildNormalizePathRewrite() { |
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103 if (runningOnWindows()) { |
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104 return new WinToNixPathRewrite(); |
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105 } else { |
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106 return new PathRewrite.Empty(); // or strip leading slash, perhaps? |
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107 } |
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108 } |
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109 |
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110 // XXX perhaps, should keep both fields right here, not in the HgRepository |
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111 public PathRewrite buildDataFilesHelper() { |
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112 // Note, tests in TestStorePath depend on the encoding not being cached |
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113 Charset cs = getFileEncoding(); |
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114 // StoragePathHelper needs fine-grained control over char encoding, hence doesn't use EncodingHelper |
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115 return new StoragePathHelper((requiresFlags & STORE) != 0, (requiresFlags & FNCACHE) != 0, (requiresFlags & DOTENCODE) != 0, cs); |
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116 } |
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117 |
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118 public PathRewrite buildRepositoryFilesHelper() { |
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119 if ((requiresFlags & STORE) != 0) { |
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120 return new PathRewrite() { |
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121 public CharSequence rewrite(CharSequence path) { |
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122 return "store/" + path; |
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123 } |
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124 }; |
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125 } else { |
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126 return new PathRewrite.Empty(); |
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127 } |
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128 } |
114
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129 |
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130 public List<Filter.Factory> getFilters(HgRepository hgRepo) { |
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131 if (filterFactories == null) { |
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132 filterFactories = new ArrayList<Filter.Factory>(); |
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133 ExtensionsSection cfg = hgRepo.getConfiguration().getExtensions(); |
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134 if (cfg.isEnabled("eol")) { |
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135 NewlineFilter.Factory ff = new NewlineFilter.Factory(); |
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136 ff.initialize(hgRepo); |
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137 filterFactories.add(ff); |
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138 } |
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139 if (cfg.isEnabled("keyword")) { |
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140 KeywordFilter.Factory ff = new KeywordFilter.Factory(); |
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141 ff.initialize(hgRepo); |
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142 filterFactories.add(ff); |
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143 } |
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144 } |
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145 return filterFactories; |
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146 } |
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147 |
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148 public void initEmptyRepository(File hgDir) throws IOException { |
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149 hgDir.mkdir(); |
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150 FileOutputStream requiresFile = new FileOutputStream(new File(hgDir, "requires")); |
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151 StringBuilder sb = new StringBuilder(40); |
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152 sb.append("revlogv1\n"); |
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153 if ((requiresFlags & STORE) != 0) { |
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154 sb.append("store\n"); |
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155 } |
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156 if ((requiresFlags & FNCACHE) != 0) { |
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157 sb.append("fncache\n"); |
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158 } |
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159 if ((requiresFlags & DOTENCODE) != 0) { |
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160 sb.append("dotencode\n"); |
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161 } |
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162 requiresFile.write(sb.toString().getBytes()); |
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163 requiresFile.close(); |
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164 new File(hgDir, "store").mkdir(); // with that, hg verify says ok. |
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165 } |
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166 |
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167 public boolean isCaseSensitiveFileSystem() { |
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168 return isCaseSensitiveFileSystem; |
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169 } |
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170 |
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171 public EncodingHelper buildFileNameEncodingHelper() { |
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172 return new EncodingHelper(getFileEncoding(), sessionContext); |
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173 } |
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174 |
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175 private Charset getFileEncoding() { |
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176 Object altEncoding = sessionContext.getConfigurationProperty(CFG_PROPERTY_FS_FILENAME_ENCODING, null); |
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177 Charset cs; |
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178 if (altEncoding == null) { |
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179 cs = Charset.defaultCharset(); |
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180 } else { |
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181 try { |
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182 cs = Charset.forName(altEncoding.toString()); |
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183 } catch (IllegalArgumentException ex) { |
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184 // both IllegalCharsetNameException and UnsupportedCharsetException are subclasses of IAE, too |
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185 // not severe enough to throw an exception, imo. Just record the fact it's bad ad we ignore it |
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186 sessionContext.getLog().dump(Internals.class, Error, ex, String.format("Bad configuration value for filename encoding %s", altEncoding)); |
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187 cs = Charset.defaultCharset(); |
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188 } |
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189 } |
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190 return cs; |
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191 } |
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192 |
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193 public static boolean runningOnWindows() { |
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194 return System.getProperty("os.name").indexOf("Windows") != -1; |
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195 } |
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196 |
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197 /** |
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198 * @param fsHint optional hint pointing to filesystem of interest (generally, it's possible to mount |
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199 * filesystems with different capabilities and repository's capabilities would depend on which fs it resides) |
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200 * @return <code>true</code> if executable files deserve tailored handling |
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201 */ |
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202 public static boolean checkSupportsExecutables(File fsHint) { |
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203 // *.exe are not executables for Mercurial |
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204 return !runningOnWindows(); |
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205 } |
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206 |
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207 /** |
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208 * @param fsHint optional hint pointing to filesystem of interest (generally, it's possible to mount |
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209 * filesystems with different capabilities and repository's capabilities would depend on which fs it resides) |
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210 * @return <code>true</code> if filesystem knows what symbolic links are |
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211 */ |
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212 public static boolean checkSupportsSymlinks(File fsHint) { |
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213 // Windows supports soft symbolic links starting from Vista |
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214 // However, as of Mercurial 2.1.1, no support for this functionality |
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215 // 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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216 return !runningOnWindows(); |
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217 } |
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218 |
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219 |
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220 /** |
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221 * For Unix, returns installation root, which is the parent directory of the hg executable (or symlink) being run. |
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222 * For Windows, it's Mercurial installation directory itself |
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223 * @param ctx |
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224 */ |
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225 private static File findHgInstallRoot(SessionContext ctx) { |
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226 // let clients to override Hg install location |
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227 String p = (String) ctx.getConfigurationProperty(CFG_PROPERTY_HG_INSTALL_ROOT, null); |
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228 if (p != null) { |
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229 return new File(p); |
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230 } |
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231 StringTokenizer st = new StringTokenizer(System.getenv("PATH"), System.getProperty("path.separator"), false); |
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232 final boolean runsOnWin = runningOnWindows(); |
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233 while (st.hasMoreTokens()) { |
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234 String pe = st.nextToken(); |
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235 File execCandidate = new File(pe, runsOnWin ? "hg.exe" : "hg"); |
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236 if (execCandidate.exists() && execCandidate.isFile()) { |
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237 File execDir = execCandidate.getParentFile(); |
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238 // e.g. on Unix runs "/shared/tools/bin/hg", directory of interest is "/shared/tools/" |
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239 return runsOnWin ? execDir : execDir.getParentFile(); |
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240 } |
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241 } |
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242 return null; |
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243 } |
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244 |
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245 /** |
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246 * @see http://www.selenic.com/mercurial/hgrc.5.html |
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247 */ |
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248 public ConfigFile readConfiguration(HgRepository hgRepo, File repoRoot) throws IOException { |
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249 ConfigFile configFile = new ConfigFile(); |
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250 File hgInstallRoot = findHgInstallRoot(HgInternals.getContext(hgRepo)); // may be null |
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251 // |
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252 if (runningOnWindows()) { |
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253 if (hgInstallRoot != null) { |
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254 for (File f : getWindowsConfigFilesPerInstall(hgInstallRoot)) { |
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255 configFile.addLocation(f); |
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256 } |
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257 } |
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258 LinkedHashSet<String> locations = new LinkedHashSet<String>(); |
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259 locations.add(System.getenv("USERPROFILE")); |
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260 locations.add(System.getenv("HOME")); |
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261 locations.remove(null); |
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262 for (String loc : locations) { |
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263 File location = new File(loc); |
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264 configFile.addLocation(new File(location, "Mercurial.ini")); |
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265 configFile.addLocation(new File(location, ".hgrc")); |
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266 } |
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267 } else { |
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268 if (hgInstallRoot != null) { |
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269 File d = new File(hgInstallRoot, "etc/mercurial/hgrc.d/"); |
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270 if (d.isDirectory() && d.canRead()) { |
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271 for (File f : listConfigFiles(d)) { |
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272 configFile.addLocation(f); |
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273 } |
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274 } |
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275 configFile.addLocation(new File(hgInstallRoot, "etc/mercurial/hgrc")); |
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276 } |
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277 // same, but with absolute paths |
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278 File d = new File("/etc/mercurial/hgrc.d/"); |
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279 if (d.isDirectory() && d.canRead()) { |
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280 for (File f : listConfigFiles(d)) { |
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281 configFile.addLocation(f); |
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282 } |
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283 } |
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284 configFile.addLocation(new File("/etc/mercurial/hgrc")); |
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285 configFile.addLocation(new File(System.getenv("HOME"), ".hgrc")); |
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286 } |
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287 // last one, overrides anything else |
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288 // <repo>/.hg/hgrc |
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289 configFile.addLocation(new File(repoRoot, "hgrc")); |
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290 return configFile; |
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291 } |
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292 |
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293 private static List<File> getWindowsConfigFilesPerInstall(File hgInstallDir) { |
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294 File f = new File(hgInstallDir, "Mercurial.ini"); |
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295 if (f.exists()) { |
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296 return Collections.singletonList(f); |
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297 } |
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298 f = new File(hgInstallDir, "hgrc.d/"); |
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299 if (f.canRead() && f.isDirectory()) { |
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300 return listConfigFiles(f); |
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301 } |
418
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302 // TODO post-1.0 query registry, e.g. with |
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303 // Runtime.exec("reg query HKLM\Software\Mercurial") |
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304 // |
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305 f = new File("C:\\Mercurial\\Mercurial.ini"); |
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306 if (f.exists()) { |
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307 return Collections.singletonList(f); |
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308 } |
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309 return Collections.emptyList(); |
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310 } |
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311 |
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312 private static List<File> listConfigFiles(File dir) { |
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313 assert dir.canRead(); |
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314 assert dir.isDirectory(); |
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315 final File[] allFiles = dir.listFiles(); |
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316 // File is Comparable, lexicographically by default |
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317 Arrays.sort(allFiles); |
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318 ArrayList<File> rv = new ArrayList<File>(allFiles.length); |
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319 for (File f : allFiles) { |
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320 if (f.getName().endsWith(".rc")) { |
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321 rv.add(f); |
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322 } |
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323 } |
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324 return rv; |
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325 } |
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326 |
382
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327 public static File getInstallationConfigurationFileToWrite(SessionContext ctx) { |
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328 File hgInstallRoot = findHgInstallRoot(ctx); // may be null |
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329 // choice of which hgrc to pick here is according to my own pure discretion |
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330 if (hgInstallRoot != null) { |
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331 // use this location only if it's writable |
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332 File cfg = new File(hgInstallRoot, runningOnWindows() ? "Mercurial.ini" : "etc/mercurial/hgrc"); |
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333 if (cfg.canWrite() || cfg.getParentFile().canWrite()) { |
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334 return cfg; |
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335 } |
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336 } |
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337 // fallback |
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338 if (runningOnWindows()) { |
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339 if (hgInstallRoot == null) { |
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340 return new File("C:\\Mercurial\\Mercurial.ini"); |
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341 } else { |
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342 // yes, we tried this file already (above) and found it non-writable |
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343 // let caller fail with can't write |
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344 return new File(hgInstallRoot, "Mercurial.ini"); |
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345 } |
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346 } else { |
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347 return new File("/etc/mercurial/hgrc"); |
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348 } |
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349 } |
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350 |
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351 public static File getUserConfigurationFileToWrite(SessionContext ctx) { |
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352 LinkedHashSet<String> locations = new LinkedHashSet<String>(); |
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353 final boolean runsOnWindows = runningOnWindows(); |
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354 if (runsOnWindows) { |
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355 locations.add(System.getenv("USERPROFILE")); |
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356 } |
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357 locations.add(System.getenv("HOME")); |
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358 locations.remove(null); |
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359 for (String loc : locations) { |
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360 File location = new File(loc); |
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361 File rv = new File(location, ".hgrc"); |
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362 if (rv.exists() && rv.canWrite()) { |
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363 return rv; |
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364 } |
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365 if (runsOnWindows) { |
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366 rv = new File(location, "Mercurial.ini"); |
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367 if (rv.exists() && rv.canWrite()) { |
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368 return rv; |
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369 } |
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370 } |
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371 } |
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372 // fallback to default, let calling code fail with Exception if can't write |
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373 return new File(System.getProperty("user.home"), ".hgrc"); |
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374 } |
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375 |
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376 public boolean shallCacheRevlogs() { |
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377 return shallCacheRevlogsInRepo; |
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378 } |
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379 |
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380 public static <T> CharSequence join(Iterable<T> col, CharSequence separator) { |
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381 if (col == null) { |
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382 return String.valueOf(col); |
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383 } |
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384 Iterator<T> it = col.iterator(); |
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385 if (!it.hasNext()) { |
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386 return "[]"; |
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387 } |
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388 String v = String.valueOf(it.next()); |
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389 StringBuilder sb = new StringBuilder(v); |
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390 while (it.hasNext()) { |
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391 sb.append(separator); |
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392 v = String.valueOf(it.next()); |
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393 sb.append(v); |
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394 } |
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395 return sb; |
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396 } |
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397 |
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398 /** |
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399 * keep an eye on all long to int downcasts to get a chance notice the lost of data |
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400 * Use if there's even subtle chance there might be loss |
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401 * (ok not to use if there's no way for l to be greater than int) |
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402 */ |
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403 public static int ltoi(long l) { |
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404 int i = (int) l; |
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405 assert ((long) i) == l : "Loss of data!"; |
6c22bdc0bdfd
Respect long offsets in revlogs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
419
diff
changeset
|
406 return i; |
6c22bdc0bdfd
Respect long offsets in revlogs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
419
diff
changeset
|
407 } |
74
6f1b88693d48
Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff
changeset
|
408 } |