Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgLookup.java @ 565:78a9e26e670d

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Refactor common code to initialize changelog revision for a command into standalone class
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 09 Apr 2013 17:15:30 +0200
parents 2f9ed6bcefa2
children f97e81d13190
rev   line source
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1 /*
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2 * Copyright (c) 2010-2012 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.repo;
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18
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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.MalformedURLException;
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23 import java.net.URL;
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25 import org.tmatesoft.hg.core.HgBadArgumentException;
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26 import org.tmatesoft.hg.core.HgRepositoryNotFoundException;
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27 import org.tmatesoft.hg.core.SessionContext;
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28 import org.tmatesoft.hg.internal.BasicSessionContext;
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29 import org.tmatesoft.hg.internal.ConfigFile;
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30 import org.tmatesoft.hg.internal.DataAccessProvider;
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31 import org.tmatesoft.hg.internal.Internals;
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32 import org.tmatesoft.hg.repo.HgRepoConfig.PathsSection;
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33
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34 /**
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35 * Utility methods to find Mercurial repository at a given location
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36 *
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37 * @author Artem Tikhomirov
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38 * @author TMate Software Ltd.
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39 */
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40 public class HgLookup {
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41
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42 private ConfigFile globalCfg;
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43 private SessionContext sessionContext;
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45 public HgLookup() {
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46 }
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47
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48 public HgLookup(SessionContext ctx) {
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49 sessionContext = ctx;
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50 }
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52 public HgRepository detectFromWorkingDir() throws HgRepositoryNotFoundException {
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53 return detect(System.getProperty("user.dir"));
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54 }
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55
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56 public HgRepository detect(String location) throws HgRepositoryNotFoundException {
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57 return detect(new File(location));
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58 }
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60 // look up in specified location and above
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61 public HgRepository detect(File location) throws HgRepositoryNotFoundException {
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62 File dir = location.getAbsoluteFile();
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63 File repository;
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64 do {
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65 repository = new File(dir, ".hg");
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66 if (repository.exists() && repository.isDirectory()) {
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67 break;
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68 }
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69 repository = null;
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70 dir = dir.getParentFile();
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71
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72 } while(dir != null);
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73 if (repository == null) {
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74 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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75 }
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76 String repoPath = repository.getParentFile().getAbsolutePath();
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77 return new HgRepository(getContext(), repoPath, repository);
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78 }
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80 public HgBundle loadBundle(File location) throws HgRepositoryNotFoundException {
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81 if (location == null || !location.canRead()) {
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82 throw new HgRepositoryNotFoundException(String.format("Can't read file %s", location)).setLocation(String.valueOf(location));
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83 }
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84 return new HgBundle(getContext(), new DataAccessProvider(getContext()), location).link();
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85 }
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87 /**
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88 * Try to instantiate remote server using an immediate url or an url from configuration files
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89 *
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90 * @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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91 * @param hgRepo optional local repository to get default or otherwise configured remote location
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92 * @return an instance featuring access to remote repository, check {@link HgRemoteRepository#isInvalid()} before actually using it
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93 * @throws HgBadArgumentException if anything is wrong with the remote server's URL
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94 */
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95 public HgRemoteRepository detectRemote(String key, HgRepository hgRepo) throws HgBadArgumentException {
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96 URL url;
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97 Exception toReport;
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98 try {
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99 url = new URL(key);
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100 toReport = null;
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101 } catch (MalformedURLException ex) {
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102 url = null;
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103 toReport = ex;
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104 }
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105 if (url == null) {
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106 String server = null;
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107 if (hgRepo != null && !hgRepo.isInvalid()) {
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108 PathsSection ps = hgRepo.getConfiguration().getPaths();
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109 server = key == null || key.trim().isEmpty() ? ps.getDefault() : ps.getString(key, null);
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110 } else if (key == null || key.trim().length() == 0) {
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111 throw new HgBadArgumentException("Can't look up empty key in a global configuration", null);
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112 }
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113 if (server == null) {
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114 server = getGlobalConfig().getSection("paths").get(key);
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115 }
181
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116 if (server == null) {
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117 throw new HgBadArgumentException(String.format("Can't find server %s specification in the config", key), toReport);
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118 }
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119 try {
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120 url = new URL(server);
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121 } catch (MalformedURLException ex) {
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122 throw new HgBadArgumentException(String.format("Found %s server spec in the config, but failed to initialize with it", key), ex);
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123 }
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124 }
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125 return new HgRemoteRepository(getContext(), url);
181
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126 }
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127
295
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128 public HgRemoteRepository detect(URL url) throws HgBadArgumentException {
171
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129 if (url == null) {
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130 throw new IllegalArgumentException();
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131 }
170
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132 if (Boolean.FALSE.booleanValue()) {
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133 throw Internals.notImplemented();
170
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134 }
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135 return new HgRemoteRepository(getContext(), url);
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136 }
181
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137
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138 private ConfigFile getGlobalConfig() {
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139 if (globalCfg == null) {
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140 globalCfg = new ConfigFile(getContext());
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141 try {
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142 globalCfg.addLocation(new File(System.getProperty("user.home"), ".hgrc"));
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143 } catch (HgInvalidFileException ex) {
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144 // XXX perhaps, makes sense to let caller/client know that we've failed to read global config?
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145 getContext().getLog().dump(getClass(), Warn, ex, null);
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146 }
181
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147 }
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148 return globalCfg;
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149 }
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150
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151 private SessionContext getContext() {
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152 if (sessionContext == null) {
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153 sessionContext = new BasicSessionContext(null);
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154 }
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155 return sessionContext;
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156 }
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157 }