Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/SubrepoManager.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 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 }