Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgBookmarks.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 6526d8adbc0f
children
rev   line source
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1 /*
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2 * Copyright (c) 2012-2013 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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18
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19 import static org.tmatesoft.hg.util.LogFacility.Severity.Error;
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20
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21 import java.io.File;
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22 import java.io.FileWriter;
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23 import java.io.IOException;
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24 import java.util.ArrayList;
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25 import java.util.Collection;
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26 import java.util.Collections;
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27 import java.util.LinkedHashMap;
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28 import java.util.Map;
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29
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30 import org.tmatesoft.hg.core.HgIOException;
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31 import org.tmatesoft.hg.core.HgRepositoryLockException;
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32 import org.tmatesoft.hg.core.Nodeid;
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33 import org.tmatesoft.hg.internal.FileChangeMonitor;
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34 import org.tmatesoft.hg.internal.Internals;
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35 import org.tmatesoft.hg.internal.LineReader;
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36 import org.tmatesoft.hg.util.LogFacility;
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37
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38 /**
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39 * Access to bookmarks state
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40 *
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41 * @see http://mercurial.selenic.com/wiki/Bookmarks
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42 * @author Artem Tikhomirov
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43 * @author TMate Software Ltd.
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44 */
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45 public final class HgBookmarks {
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46 private final Internals repo;
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47 private Map<String, Nodeid> bookmarks = Collections.emptyMap();
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48 private String activeBookmark;
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49 private FileChangeMonitor activeTracker, bmFileTracker;
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50
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51 HgBookmarks(Internals internals) {
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52 repo = internals;
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53 }
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54
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55 /*package-local*/ void read() throws HgRuntimeException {
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56 readBookmarks();
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57 readActiveBookmark();
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58 }
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59
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60 private void readBookmarks() throws HgRuntimeException {
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61 final LogFacility log = repo.getLog();
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62 File all = repo.getRepositoryFile(HgRepositoryFiles.Bookmarks);
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63 try {
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64 LinkedHashMap<String, Nodeid> bm = new LinkedHashMap<String, Nodeid>();
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65 if (all.canRead() && all.isFile()) {
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66 LineReader lr1 = new LineReader(all, log);
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67 ArrayList<String> c = new ArrayList<String>();
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68 lr1.read(new LineReader.SimpleLineCollector(), c);
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69 for (String s : c) {
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70 int x = s.indexOf(' ');
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71 try {
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72 if (x > 0) {
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73 Nodeid nid = Nodeid.fromAscii(s.substring(0, x));
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74 String name = new String(s.substring(x+1));
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75 if (repo.getRepo().getChangelog().isKnown(nid)) {
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76 // copy name part not to drag complete line
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77 bm.put(name, nid);
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78 } else {
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79 log.dump(getClass(), LogFacility.Severity.Info, "Bookmark %s points to non-existent revision %s, ignored.", name, nid);
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80 }
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81 } else {
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82 log.dump(getClass(), LogFacility.Severity.Warn, "Can't parse bookmark entry: %s", s);
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83 }
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84 } catch (IllegalArgumentException ex) {
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85 log.dump(getClass(), LogFacility.Severity.Warn, ex, String.format("Can't parse bookmark entry: %s", s));
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86 }
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87 }
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88 bookmarks = bm;
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89 } else {
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90 bookmarks = Collections.emptyMap();
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91 }
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92 if (bmFileTracker == null) {
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93 bmFileTracker = new FileChangeMonitor(all);
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94 }
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95 bmFileTracker.touch(this);
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96 } catch (HgInvalidControlFileException ex) {
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97 // do not translate HgInvalidControlFileException into another HgInvalidControlFileException
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98 // but only HgInvalidFileException
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99 throw ex;
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100 } catch (HgIOException ex) {
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101 throw new HgInvalidControlFileException(ex, true);
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102 }
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103 }
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104
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105 private void readActiveBookmark() throws HgInvalidControlFileException {
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106 activeBookmark = null;
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107 File active = repo.getRepositoryFile(HgRepositoryFiles.BookmarksCurrent);
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108 try {
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109 if (active.canRead() && active.isFile()) {
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110 LineReader lr2 = new LineReader(active, repo.getLog());
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111 ArrayList<String> c = new ArrayList<String>(2);
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112 lr2.read(new LineReader.SimpleLineCollector(), c);
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113 if (c.size() > 0) {
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114 activeBookmark = c.get(0);
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115 }
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116 }
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117 if (activeTracker == null) {
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118 activeTracker = new FileChangeMonitor(active);
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119 }
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120 activeTracker.touch(this);
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121 } catch (HgIOException ex) {
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122 throw new HgInvalidControlFileException(ex, true);
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123 }
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124 }
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125
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126 /*package-local*/void reloadIfChanged() throws HgRuntimeException {
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127 assert activeTracker != null;
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128 assert bmFileTracker != null;
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129 if (bmFileTracker.changed(this)) {
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130 readBookmarks();
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131 }
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132 if (activeTracker.changed(this)) {
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133 readActiveBookmark();
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134 }
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135 }
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136
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137
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138 /**
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139 * Tell name of the active bookmark
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140 * @return <code>null</code> if none active
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141 */
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142 public String getActiveBookmarkName() {
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143 return activeBookmark;
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144 }
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145
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146 /**
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147 * Retrieve revision associated with the named bookmark.
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148 *
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149 * @param bookmarkName name of the bookmark
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150 * @return revision or <code>null</code> if bookmark is not known
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151 */
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152 public Nodeid getRevision(String bookmarkName) {
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153 return bookmarks.get(bookmarkName);
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154 }
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155
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156 /**
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157 * Retrieve all bookmarks known in the repository
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158 * @return collection with names, never <code>null</code>
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159 */
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160 public Collection<String> getAllBookmarks() {
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161 // bookmarks are initialized with atomic assignment,
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162 // hence can use view (not a synchronized copy) here
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163 return Collections.unmodifiableSet(bookmarks.keySet());
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164 }
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165
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166 /**
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167 * Update currently bookmark with new commit.
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168 * Note, child has to be descendant of a p1 or p2
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169 *
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170 * @param p1 first parent, or <code>null</code>
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171 * @param p2 second parent, or <code>null</code>
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172 * @param child new commit, descendant of one of the parents, not <code>null</code>
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173 * @throws HgIOException if failed to write updated bookmark information
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174 * @throws HgRepositoryLockException if failed to lock repository for modifications
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175 */
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176 public void updateActive(Nodeid p1, Nodeid p2, Nodeid child) throws HgIOException, HgRepositoryLockException {
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177 if (activeBookmark == null) {
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178 return;
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179 }
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180 Nodeid activeRev = getRevision(activeBookmark);
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181 if (!activeRev.equals(p1) && !activeRev.equals(p2)) {
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182 return; // TestCommit#testNoBookmarkUpdate
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183 }
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184 if (child.equals(activeRev)) {
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185 return;
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186 }
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187 LinkedHashMap<String, Nodeid> copy = new LinkedHashMap<String, Nodeid>(bookmarks);
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188 copy.put(activeBookmark, child);
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189 bookmarks = copy;
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190 write();
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191 }
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192
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193 private void write() throws HgIOException, HgRepositoryLockException {
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194 File bookmarksFile = repo.getRepositoryFile(HgRepositoryFiles.Bookmarks);
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195 HgRepositoryLock workingDirLock = repo.getRepo().getWorkingDirLock();
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196 FileWriter fileWriter = null;
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197 workingDirLock.acquire();
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198 try {
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199 fileWriter = new FileWriter(bookmarksFile);
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200 for (String bm : bookmarks.keySet()) {
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201 Nodeid nid = bookmarks.get(bm);
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202 fileWriter.write(String.format("%s %s\n", nid.toString(), bm));
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203 }
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204 fileWriter.flush();
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205 } catch (IOException ex) {
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206 throw new HgIOException("Failed to serialize bookmarks", ex, bookmarksFile);
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207 } finally {
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208 try {
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209 if (fileWriter != null) {
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210 fileWriter.close();
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211 }
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212 } catch (IOException ex) {
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213 repo.getLog().dump(getClass(), Error, ex, null);
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214 }
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215 workingDirLock.release();
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216 }
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217 }
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218 }