Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/SubrepoManager.java @ 598:d29d9dc6c128

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Utilize the fact nodeids are very different and are read anyway to speed up reverse lookup
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 03 May 2013 15:19:18 +0200
parents e4ee4bf4c7d0
children
rev   line source
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1 /*
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2 * Copyright (c) 2011-2013 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.internal;
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18
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19 import java.io.BufferedReader;
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20 import java.io.File;
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21 import java.io.FileReader;
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22 import java.io.IOException;
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23 import java.util.Arrays;
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24 import java.util.Collections;
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25 import java.util.HashMap;
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26 import java.util.LinkedList;
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27 import java.util.List;
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28 import java.util.Map;
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29
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30 import org.tmatesoft.hg.core.Nodeid;
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31 import org.tmatesoft.hg.repo.HgInternals;
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32 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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33 import org.tmatesoft.hg.repo.HgRepository;
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34 import org.tmatesoft.hg.repo.HgSubrepoLocation;
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35 import org.tmatesoft.hg.util.Path;
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36
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37 /**
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38 *
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39 * @see http://mercurial.selenic.com/wiki/SubrepoWork
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40 * @see http://mercurial.selenic.com/wiki/Subrepository
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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 SubrepoManager /* XXX RepoChangeNotifier, RepoChangeListener */{
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45
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46 private final HgRepository repo;
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47 private List<HgSubrepoLocation> subRepos;
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48
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49 public SubrepoManager(HgRepository hgRepo) {
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50 assert hgRepo != null;
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51 repo = hgRepo;
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52 }
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53
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54 private List<HgSubrepoLocation> readActualState() throws HgInvalidControlFileException {
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55 File hgsubFile = new File(repo.getWorkingDir(), ".hgsub");
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56 if (!hgsubFile.canRead()) {
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57 return Collections.emptyList();
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58 }
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59 Map<String, String> state; // path -> revision
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60 File hgstateFile = null;
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61 try {
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62 hgstateFile = new File(repo.getWorkingDir(), ".hgsubstate");
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63 if (hgstateFile.canRead()) {
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64 state = readState(new BufferedReader(new FileReader(hgstateFile)));
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65 } else {
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66 state = Collections.emptyMap();
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67 }
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68 } catch (IOException ex) {
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69 throw new HgInvalidControlFileException("Subrepo state read failed", ex, hgstateFile);
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70 }
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71 try {
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72 BufferedReader br = new BufferedReader(new FileReader(hgsubFile));
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73 return readConfig(br, state);
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74 } catch (IOException ex) {
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75 throw new HgInvalidControlFileException("Subrepo state read failed", ex, hgsubFile);
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76 }
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77 }
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78
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79 private List<HgSubrepoLocation> readConfig(BufferedReader br, Map<String, String> substate) throws IOException {
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80 try {
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81 String line;
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82 LinkedList<HgSubrepoLocation> res = new LinkedList<HgSubrepoLocation>();
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83 HgInternals hgRepoInternal = new HgInternals(repo);
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84 final Path.Source pathFactory = repo.getSessionContext().getPathFactory();
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85 while ((line = br.readLine()) != null) {
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86 int sep = line.indexOf('=');
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87 if (sep == -1) {
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88 continue;
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89 }
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90 // since both key and value are referenced from HgSubrepoLocation, doesn't make sense
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91 // to have separate String instances (new String(line.substring()))
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92 String key = line.substring(0, sep).trim();
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93 String value = line.substring(sep + 1).trim();
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94 if (key.length() == 0 || value.length() == 0) {
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95 // XXX log bad line?
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96 continue;
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97 }
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98 HgSubrepoLocation.Kind kind = HgSubrepoLocation.Kind.Hg;
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99 int kindEnd = value.indexOf(']', 1);
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100 if (value.charAt(0) == '[' && kindEnd != -1) {
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101 String kindStr = value.substring(1, kindEnd);
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102 value = value.substring(kindEnd + 1);
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103 if ("svn".equals(kindStr)) {
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104 kind = HgSubrepoLocation.Kind.SVN;
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105 } else if ("git".equals(kindStr)) {
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106 kind = HgSubrepoLocation.Kind.Git;
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107 }
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108 }
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109 // TODO respect paths mappings in config file
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110 //
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111 // apparently, key value can't end with '/', `hg commit` fails if it does:
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112 // abort: path ends in directory separator: fourth/
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113 Path p = pathFactory.path(key.charAt(key.length()-1) == '/' ? key : key + '/');
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114 String revValue = substate.get(key);
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115 HgSubrepoLocation loc = hgRepoInternal.newSubrepo(p, value, kind, revValue == null ? null : Nodeid.fromAscii(revValue));
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116 res.add(loc);
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117 }
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118 return Arrays.asList(res.toArray(new HgSubrepoLocation[res.size()]));
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119 } finally {
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120 br.close();
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121 }
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122 }
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123
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124 private Map<String, String> readState(BufferedReader br) throws IOException {
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125 // TODO reuse for other files with <revision><space><value> format, like .hgtags
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126 HashMap<String, String> rv = new HashMap<String, String>();
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127 try {
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128 String line;
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129 while ((line = br.readLine()) != null) {
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130 int sep = line.trim().indexOf(' ');
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131 if (sep != -1) {
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132 rv.put(line.substring(sep+1).trim(), line.substring(0, sep).trim());
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133 }
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134 }
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135 } finally {
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136 br.close();
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137 }
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138 return rv;
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139 }
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140
348
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141 /*public to allow access from HgRepository, otherwise package-local*/
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142 public void read() throws HgInvalidControlFileException {
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143 subRepos = readActualState();
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144 }
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145
239
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146 public List<HgSubrepoLocation> all(/*int revision, or TIP|WC*/) {
348
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147 assert subRepos != null;
239
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148 return subRepos;
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149 }
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150 }