Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgLookup.java @ 493:ba36f66c32b4

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Refactor to keep knowledge about repository control files and their location in respect to .hg/ in a single place (facilitate future adoption of shared repositories)
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 18 Oct 2012 18:36:13 +0200
parents e4eaa23e3442
children 0bd2d0441d8f
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
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32 /**
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33 * Utility methods to find Mercurial repository at a given location
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34 *
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35 * @author Artem Tikhomirov
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36 * @author TMate Software Ltd.
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37 */
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38 public class HgLookup {
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39
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40 private ConfigFile globalCfg;
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41 private SessionContext sessionContext;
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42
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43 public HgLookup() {
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44 }
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45
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46 public HgLookup(SessionContext ctx) {
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47 sessionContext = ctx;
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48 }
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50 public HgRepository detectFromWorkingDir() throws HgRepositoryNotFoundException {
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51 return detect(System.getProperty("user.dir"));
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52 }
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53
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54 public HgRepository detect(String location) throws HgRepositoryNotFoundException {
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55 return detect(new File(location));
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56 }
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58 // look up in specified location and above
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59 public HgRepository detect(File location) throws HgRepositoryNotFoundException {
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60 File dir = location.getAbsoluteFile();
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61 File repository;
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62 do {
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63 repository = new File(dir, ".hg");
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64 if (repository.exists() && repository.isDirectory()) {
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65 break;
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66 }
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67 repository = null;
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68 dir = dir.getParentFile();
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69
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70 } while(dir != null);
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71 if (repository == null) {
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72 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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73 }
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74 String repoPath = repository.getParentFile().getAbsolutePath();
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75 return new HgRepository(getContext(), repoPath, repository);
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76 }
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78 public HgBundle loadBundle(File location) throws HgRepositoryNotFoundException {
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79 if (location == null || !location.canRead()) {
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80 throw new HgRepositoryNotFoundException(String.format("Can't read file %s", location)).setLocation(String.valueOf(location));
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81 }
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82 return new HgBundle(getContext(), new DataAccessProvider(getContext()), location).link();
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83 }
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85 /**
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86 * Try to instantiate remote server.
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87 * @param key either URL or a key from configuration file that points to remote server
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88 * @param hgRepo <em>NOT USED YET<em> local repository that may have extra config, or default remote location
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89 * @return an instance featuring access to remote repository, check {@link HgRemoteRepository#isInvalid()} before actually using it
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90 * @throws HgBadArgumentException if anything is wrong with the remote server's URL
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91 */
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92 public HgRemoteRepository detectRemote(String key, HgRepository hgRepo) throws HgBadArgumentException {
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93 URL url;
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94 Exception toReport;
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95 try {
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96 url = new URL(key);
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97 toReport = null;
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98 } catch (MalformedURLException ex) {
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99 url = null;
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100 toReport = ex;
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101 }
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102 if (url == null) {
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103 String server = getGlobalConfig().getSection("paths").get(key);
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104 if (server == null) {
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105 throw new HgBadArgumentException(String.format("Can't find server %s specification in the config", key), toReport);
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106 }
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107 try {
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108 url = new URL(server);
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109 } catch (MalformedURLException ex) {
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110 throw new HgBadArgumentException(String.format("Found %s server spec in the config, but failed to initialize with it", key), ex);
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111 }
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112 }
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113 return new HgRemoteRepository(getContext(), url);
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114 }
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115
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116 public HgRemoteRepository detect(URL url) throws HgBadArgumentException {
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117 if (url == null) {
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118 throw new IllegalArgumentException();
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119 }
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120 if (Boolean.FALSE.booleanValue()) {
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121 throw HgRepository.notImplemented();
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122 }
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123 return new HgRemoteRepository(getContext(), url);
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124 }
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125
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126 private ConfigFile getGlobalConfig() {
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127 if (globalCfg == null) {
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128 globalCfg = new ConfigFile(getContext());
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129 try {
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130 globalCfg.addLocation(new File(System.getProperty("user.home"), ".hgrc"));
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131 } catch (HgInvalidFileException ex) {
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132 // XXX perhaps, makes sense to let caller/client know that we've failed to read global config?
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133 getContext().getLog().dump(getClass(), Warn, ex, null);
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134 }
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135 }
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136 return globalCfg;
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137 }
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138
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139 private SessionContext getContext() {
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140 if (sessionContext == null) {
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141 sessionContext = new BasicSessionContext(null);
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142 }
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143 return sessionContext;
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144 }
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145 }