Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgLookup.java @ 709:497e697636fc

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Report merged lines as changed block if possible, not as a sequence of added/deleted blocks. To facilitate access to merge parent lines AddBlock got mergeLineAt() method that reports index of the line in the second parent (if any), while insertedAt() has been changed to report index in the first parent always
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 21 Aug 2013 16:23:27 +0200
parents a483b2b68a2e
children
rev   line source
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1 /*
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2 * Copyright (c) 2010-2013 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.repo;
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19 import static org.tmatesoft.hg.util.LogFacility.Severity.Warn;
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20
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21 import java.io.File;
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22 import java.net.URI;
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23 import java.net.URISyntaxException;
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24 import java.net.URL;
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25 import java.net.URLStreamHandler;
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26 import java.net.URLStreamHandlerFactory;
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28 import org.tmatesoft.hg.core.HgBadArgumentException;
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29 import org.tmatesoft.hg.core.HgIOException;
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30 import org.tmatesoft.hg.core.HgRepositoryNotFoundException;
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31 import org.tmatesoft.hg.core.SessionContext;
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32 import org.tmatesoft.hg.internal.BasicSessionContext;
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33 import org.tmatesoft.hg.internal.ConfigFile;
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34 import org.tmatesoft.hg.internal.DataAccessProvider;
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35 import org.tmatesoft.hg.internal.RequiresFile;
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36 import org.tmatesoft.hg.repo.HgRepoConfig.PathsSection;
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37
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38 /**
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39 * Utility methods to find Mercurial repository at a given location
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40 *
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41 * @author Artem Tikhomirov
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42 * @author TMate Software Ltd.
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43 */
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44 public class HgLookup implements SessionContext.Source {
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46 private ConfigFile globalCfg;
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47 private SessionContext sessionContext;
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48
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49 public HgLookup() {
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50 }
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51
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52 public HgLookup(SessionContext ctx) {
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53 sessionContext = ctx;
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54 }
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56 public HgRepository detectFromWorkingDir() throws HgRepositoryNotFoundException {
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57 return detect(System.getProperty("user.dir"));
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58 }
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59
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60 public HgRepository detect(String location) throws HgRepositoryNotFoundException {
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61 return detect(new File(location));
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62 }
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63
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64 /**
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65 * Look up repository in specified location and above
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66 *
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67 * @param location where to look for .hg directory, never <code>null</code>
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68 * @return repository object, never <code>null</code>
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69 * @throws HgRepositoryNotFoundException if no repository found, or repository version is not supported
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70 */
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71 public HgRepository detect(File location) throws HgRepositoryNotFoundException {
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72 File dir = location.getAbsoluteFile();
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73 File repository;
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74 do {
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75 repository = new File(dir, ".hg");
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76 if (repository.exists() && repository.isDirectory()) {
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77 break;
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78 }
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79 repository = null;
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80 dir = dir.getParentFile();
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81
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82 } while(dir != null);
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83 if (repository == null) {
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84 throw new HgRepositoryNotFoundException(String.format("Can't locate .hg/ directory of Mercurial repository in %s nor in parent dirs", location)).setLocation(location.getPath());
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85 }
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86 try {
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87 String repoPath = repository.getParentFile().getAbsolutePath();
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88 HgRepository rv = new HgRepository(getSessionContext(), repoPath, repository);
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89 int requiresFlags = rv.getImplHelper().getRequiresFlags();
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90 if ((requiresFlags & RequiresFile.REVLOGV1) == 0) {
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91 throw new HgRepositoryNotFoundException(String.format("%s: repository version is not supported (Mercurial <0.9?)", repoPath)).setLocation(location.getPath());
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92 }
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93 return rv;
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94 } catch (HgRuntimeException ex) {
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95 HgRepositoryNotFoundException e = new HgRepositoryNotFoundException("Failed to initialize Hg4J library").setLocation(location.getPath());
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96 e.initCause(ex);
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97 throw e;
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98 }
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99 }
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100
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101 public HgBundle loadBundle(File location) throws HgRepositoryNotFoundException {
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102 if (location == null || !location.canRead()) {
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103 throw new HgRepositoryNotFoundException(String.format("Can't read file %s", location)).setLocation(String.valueOf(location));
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104 }
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105 return new HgBundle(getSessionContext(), new DataAccessProvider(getSessionContext()), location).link();
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106 }
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108 /**
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109 * Try to instantiate remote server using an immediate url or an url from configuration files
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110 *
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111 * @param key either URL or a key from configuration file that points to remote server; if <code>null</code> or empty string, default remote location of the supplied repository (if any) is looked up
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112 * @param hgRepo optional local repository to get default or otherwise configured remote location
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113 * @return an instance featuring access to remote repository, check {@link HgRemoteRepository#isInvalid()} before actually using it
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114 * @throws HgBadArgumentException if anything is wrong with the remote server's URL
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115 */
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116 public HgRemoteRepository detectRemote(String key, HgRepository hgRepo) throws HgBadArgumentException {
698
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117 URI uri;
181
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118 Exception toReport;
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119 try {
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120 uri = new URI(key);
181
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121 toReport = null;
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122 } catch (URISyntaxException ex) {
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123 uri = null;
181
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124 toReport = ex;
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125 }
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126 if (uri == null) {
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127 String server = null;
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128 if (hgRepo != null && !hgRepo.isInvalid()) {
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129 PathsSection ps = hgRepo.getConfiguration().getPaths();
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130 server = key == null || key.trim().length() == 0 ? ps.getDefault() : ps.getString(key, null); // XXX Java 1.5 isEmpty()
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131 } else if (key == null || key.trim().length() == 0) {
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132 throw new HgBadArgumentException("Can't look up empty key in a global configuration", null);
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133 }
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134 if (server == null) {
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135 server = getGlobalConfig().getSection("paths").get(key);
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136 }
181
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137 if (server == null) {
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138 throw new HgBadArgumentException(String.format("Can't find server %s specification in the config", key), toReport);
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139 }
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140 try {
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141 uri = new URI(server);
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142 } catch (URISyntaxException ex) {
181
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143 throw new HgBadArgumentException(String.format("Found %s server spec in the config, but failed to initialize with it", key), ex);
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144 }
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145 }
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146 return detectRemote(uri);
181
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147 }
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148
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149 /**
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150 * Detect remote repository
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151 * <p>Use of this method is discouraged, please use {@link #detectRemote(URI)} instead}
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152 *
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153 * @param url location of remote repository
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154 * @return instance to interact with remote repository
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155 * @throws HgBadArgumentException if location format is not a valid {@link URI}
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156 * @throws IllegalArgumentException if url is <code>null</code>
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157 */
295
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158 public HgRemoteRepository detect(URL url) throws HgBadArgumentException {
171
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159 if (url == null) {
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160 throw new IllegalArgumentException();
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161 }
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162 try {
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163 return detectRemote(url.toURI());
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164 } catch (URISyntaxException ex) {
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165 throw new HgBadArgumentException(String.format("Bad remote repository location: %s", url), ex);
170
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166 }
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167 }
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168
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169 /**
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170 * Resolves location of remote repository.
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171 *
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172 * <p>Choice between {@link URI URIs} and {@link URL URLs} done in favor of former because they are purely syntactical,
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173 * while latter have semantics of {@link URL#openConnection() connection} establishing, which is not always possible.
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174 * E.g. one can't instantiate <code>new URL("ssh://localhost/")</code> as long as there's no local {@link URLStreamHandler}
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175 * for the protocol, which is the case for certain JREs out there. The way {@link URLStreamHandlerFactory URLStreamHandlerFactories}
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176 * are installed (static field/method) is quite fragile, and definitely not the one to rely on from a library's code (apps can carefully
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177 * do this, but library can't install own nor expect anyone outside there would do). Use of fake {@link URLStreamHandler} (fails to open
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178 * every connection) is possible, of course, although it seems to be less appropriate when there is alternative with {@link URI URIs}.
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179 *
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180 * @param uriRemote remote repository location
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181 * @return instance to interact with remote repository
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182 * @throws HgBadArgumentException
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183 */
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184 public HgRemoteRepository detectRemote(URI uriRemote) throws HgBadArgumentException {
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185 HgRemoteRepository.RemoteDescriptor rd = getSessionContext().getRemoteDescriptor(uriRemote);
698
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186 if (rd == null) {
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187 throw new HgBadArgumentException(String.format("Unsupported remote repository location:%s", uriRemote), null);
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188 }
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189 return new HgRemoteRepository(getSessionContext(), rd);
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190 }
181
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191
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192 private ConfigFile getGlobalConfig() {
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193 if (globalCfg == null) {
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194 globalCfg = new ConfigFile(getSessionContext());
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195 try {
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196 globalCfg.addLocation(new File(System.getProperty("user.home"), ".hgrc"));
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197 } catch (HgIOException ex) {
295
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198 // XXX perhaps, makes sense to let caller/client know that we've failed to read global config?
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199 getSessionContext().getLog().dump(getClass(), Warn, ex, null);
295
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200 }
181
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201 }
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202 return globalCfg;
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203 }
295
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204
618
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205 public SessionContext getSessionContext() {
295
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206 if (sessionContext == null) {
431
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207 sessionContext = new BasicSessionContext(null);
295
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208 }
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209 return sessionContext;
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210 }
2
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211 }