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annotate src/org/tmatesoft/hg/repo/ext/MqManager.java @ 477:9c9d09111aee

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author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 12 Jul 2012 18:07:51 +0200
parents 0e34b8f3946a
children f3fab7a20841
rev   line source
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1 /*
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2 * Copyright (c) 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.ext;
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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.BufferedReader;
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22 import java.io.File;
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23 import java.io.FileReader;
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24 import java.io.IOException;
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25 import java.util.ArrayList;
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26 import java.util.Collection;
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27 import java.util.Collections;
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28 import java.util.HashMap;
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29 import java.util.LinkedList;
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30 import java.util.List;
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31 import java.util.Map;
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32
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33 import org.tmatesoft.hg.core.Nodeid;
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34 import org.tmatesoft.hg.repo.HgInternals;
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35 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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36 import org.tmatesoft.hg.repo.HgInvalidFileException;
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37 import org.tmatesoft.hg.repo.HgRepository;
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38 import org.tmatesoft.hg.util.LogFacility;
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39 import org.tmatesoft.hg.util.Path;
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40
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41 /**
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42 * Mercurial Queues Support.
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43 * Access to MqExtension functionality.
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44 *
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45 * @author Artem Tikhomirov
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46 * @author TMate Software Ltd.
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47 */
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48 public class MqManager {
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49
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50 private static final String PATCHES_DIR = "patches";
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51
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52 private final HgRepository repo;
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53 private List<PatchRecord> applied = Collections.emptyList();
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54 private List<PatchRecord> allKnown = Collections.emptyList();
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55 private List<String> queueNames = Collections.emptyList();
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56 private String activeQueue = PATCHES_DIR;
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57
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58 public MqManager(HgRepository hgRepo) {
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59 repo = hgRepo;
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60 }
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61
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62 /**
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63 * Updates manager with up-to-date state of the mercurial queues.
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64 */
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65 public void refresh() throws HgInvalidControlFileException {
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66 applied = allKnown = Collections.emptyList();
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67 queueNames = Collections.emptyList();
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68 File repoDir = HgInternals.getRepositoryDir(repo);
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69 final LogFacility log = HgInternals.getContext(repo).getLog();
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70 try {
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71 File queues = new File(repoDir, "patches.queues");
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72 if (queues.isFile()) {
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73 LineReader lr = new LineReader(queues, log).trimLines(true).skipEmpty(true);
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74 lr.read(new SimpleLineCollector(), queueNames = new LinkedList<String>());
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75 }
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76 final String queueLocation; // path under .hg to patch queue information (status, series and diff files)
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77 File activeQueueFile = new File(repoDir, "patches.queue");
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78 // file is there only if it's not default queue ('patches') that is active
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79 if (activeQueueFile.isFile()) {
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80 ArrayList<String> contents = new ArrayList<String>();
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81 new LineReader(activeQueueFile, log).read(new SimpleLineCollector(), contents);
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82 if (contents.isEmpty()) {
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83 log.dump(getClass(), Warn, "File %s with active queue name is empty", activeQueueFile.getName());
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84 activeQueue = PATCHES_DIR;
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85 queueLocation = PATCHES_DIR + '/';
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86 } else {
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87 activeQueue = contents.get(0);
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88 queueLocation = PATCHES_DIR + '-' + activeQueue + '/';
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89 }
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90 } else {
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91 activeQueue = PATCHES_DIR;
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92 queueLocation = PATCHES_DIR + '/';
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93 }
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94 final Path.Source patchLocation = new Path.Source() {
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95
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96 public Path path(CharSequence p) {
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97 StringBuilder sb = new StringBuilder(64);
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98 sb.append(".hg/");
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99 sb.append(queueLocation);
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100 sb.append(p);
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101 return Path.create(sb);
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102 }
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103 };
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104 final File fileStatus = new File(repoDir, queueLocation + "status");
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105 final File fileSeries = new File(repoDir, queueLocation + "series");
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106 if (fileStatus.isFile()) {
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107 new LineReader(fileStatus, log).read(new LineConsumer<List<PatchRecord>>() {
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108
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109 public boolean consume(String line, List<PatchRecord> result) throws IOException {
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110 int sep = line.indexOf(':');
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111 if (sep == -1) {
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112 log.dump(MqManager.class, Warn, "Bad line in %s:%s", fileStatus.getPath(), line);
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113 return true;
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114 }
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115 Nodeid nid = Nodeid.fromAscii(line.substring(0, sep));
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116 String name = new String(line.substring(sep+1));
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117 result.add(new PatchRecord(nid, name, patchLocation.path(name)));
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118 return true;
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119 }
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120 }, applied = new LinkedList<PatchRecord>());
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121 }
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122 if (fileSeries.isFile()) {
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123 final Map<String,PatchRecord> name2patch = new HashMap<String, PatchRecord>();
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124 for (PatchRecord pr : applied) {
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125 name2patch.put(pr.getName(), pr);
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126 }
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127 LinkedList<String> knownPatchNames = new LinkedList<String>();
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128 new LineReader(fileSeries, log).read(new SimpleLineCollector(), knownPatchNames);
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129 // XXX read other queues?
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130 allKnown = new ArrayList<PatchRecord>(knownPatchNames.size());
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131 for (String name : knownPatchNames) {
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132 PatchRecord pr = name2patch.get(name);
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133 if (pr == null) {
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134 pr = new PatchRecord(null, name, patchLocation.path(name));
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135 }
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136 allKnown.add(pr);
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137 }
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138 }
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139 } catch (HgInvalidFileException ex) {
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140 HgInvalidControlFileException th = new HgInvalidControlFileException(ex.getMessage(), ex.getCause(), ex.getFile());
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141 th.setStackTrace(ex.getStackTrace());
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142 throw th;
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143 }
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144 }
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145
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146 static class SimpleLineCollector implements LineConsumer<Collection<String>> {
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147
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148 public boolean consume(String line, Collection<String> result) throws IOException {
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149 result.add(line);
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150 return true;
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151 }
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152 }
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153
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154 /**
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155 * Number of patches not yet applied
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156 * @return positive value when there are
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157 */
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158 public int getQueueSize() {
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159 return getAllKnownPatches().size() - getAppliedPatches().size();
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160 }
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161
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162 /**
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163 * Subset of the patches from the queue that were already applied to the repository
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164 * <p>Analog of 'hg qapplied'
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165 *
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166 * <p>Clients shall call {@link #refresh()} prior to first use
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167 * @return collection of records in no particular order, may be empty if none applied
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168 */
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169 public List<PatchRecord> getAppliedPatches() {
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170 return Collections.unmodifiableList(applied);
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171 }
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172
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173 /**
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174 * All of the patches in the active queue that MQ knows about for this repository
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175 *
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176 * <p>Clients shall call {@link #refresh()} prior to first use
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177 * @return collection of records in no particular order, may be empty if there are no patches in the queue
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178 */
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179 public List<PatchRecord> getAllKnownPatches() {
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180 return Collections.unmodifiableList(allKnown);
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181 }
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182
464
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183 /**
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184 * Name of the patch queue <code>hg qqueue --active</code> which is active now.
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185 * @return patch queue name
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186 */
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187 public String getActiveQueueName() {
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188 return activeQueue;
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189 }
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190
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191 /**
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192 * Patch queues known in the repository, <code>hg qqueue -l</code> analog.
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193 * There's at least one patch queue (default one names 'patches'). Only one patch queue at a time is active.
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194 *
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195 * @return names of patch queues
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196 */
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197 public List<String> getQueueNames() {
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198 return Collections.unmodifiableList(queueNames);
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199 }
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200
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201 public final class PatchRecord {
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202 private final Nodeid nodeid;
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203 private final String name;
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204 private final Path location;
464
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205
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206 // hashCode/equals might be useful if cons becomes public
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207
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208 PatchRecord(Nodeid revision, String name, Path diffLocation) {
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209 nodeid = revision;
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210 this.name = name;
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211 this.location = diffLocation;
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212 }
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213
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214 /**
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215 * Identifies changeset of the patch that has been applied to the repository
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216 *
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217 * @return changeset revision or <code>null</code> if this patch is not yet applied
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218 */
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219 public Nodeid getRevision() {
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220 return nodeid;
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221 }
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222
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223 /**
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224 * Identifies patch, either based on a user-supplied name (<code>hg qnew <i>patch-name</i></code>) or
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225 * an automatically generated name (like <code><i>revisionIndex</i>.diff</code> for imported changesets).
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226 * Clients shall not rely on this naming scheme, though.
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227 *
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228 * @return never <code>null</code>
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229 */
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230 public String getName() {
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231 return name;
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232 }
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233
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234 /**
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235 * Location of diff file with the patch, relative to repository root
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236 * @return path to the patch, never <code>null</code>
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237 */
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238 public Path getPatchLocation() {
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239 return location;
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240 }
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241
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242 @Override
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243 public String toString() {
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244 String fmt = "mq.PatchRecord[name:%s; %spath:%s]";
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245 String ni = nodeid != null ? String.format("applied as: %s; ", nodeid.shortNotation()) : "";
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246 return String.format(fmt, name, ni, location);
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247 }
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248 }
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249
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250 // TODO refine API and extract into separate classes
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251
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252 interface LineConsumer<T> {
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253 // boolean begin(File f, T paramObj) throws IOException;
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254 boolean consume(String line, T paramObj) throws IOException;
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255 // boolean end(File f, T paramObj) throws IOException;
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256 }
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257
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258 class LineReader {
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259
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260 private final File file;
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261 private final LogFacility log;
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262 private boolean trimLines = true;
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263 private boolean skipEmpty = true;
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264 private String ignoreThatStars = null;
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265
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266 LineReader(File f, LogFacility logFacility) {
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267 file = f;
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268 log = logFacility;
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269 }
464
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270
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271 /**
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272 * default: <code>true</code>
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273 * <code>false</code> to return line as is
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274 */
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275 LineReader trimLines(boolean trim) {
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276 trimLines = trim;
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277 return this;
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278 }
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279
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280 /**
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281 * default: <code>true</code>
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282 * <code>false</code> to pass empty lines to consumer
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283 */
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284 LineReader skipEmpty(boolean skip) {
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285 skipEmpty = skip;
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286 return this;
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287 }
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288
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289 /**
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290 * default: doesn't skip any line.
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291 * set e.g. to "#" or "//" to skip lines that start with such prefix
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292 */
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293 LineReader ignoreLineComments(String lineStart) {
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294 ignoreThatStars = lineStart;
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295 return this;
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296 }
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297
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298 <T> void read(LineConsumer<T> consumer, T paramObj) throws HgInvalidFileException {
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299 BufferedReader statusFileReader = null;
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300 try {
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301 // consumer.begin(file, paramObj);
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302 statusFileReader = new BufferedReader(new FileReader(file));
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303 String line;
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304 boolean ok = true;
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305 while (ok && (line = statusFileReader.readLine()) != null) {
464
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306 if (trimLines) {
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307 line = line.trim();
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308 }
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309 if (ignoreThatStars != null && line.startsWith(ignoreThatStars)) {
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310 continue;
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311 }
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312 if (!skipEmpty || line.length() > 0) {
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313 ok = consumer.consume(line, paramObj);
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314 }
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315 }
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316 } catch (IOException ex) {
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317 throw new HgInvalidFileException(ex.getMessage(), ex, file);
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318 } finally {
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319 try {
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320 statusFileReader.close();
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321 } catch (IOException ex) {
471
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322 log.dump(MqManager.class, Warn, ex, null);
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323 }
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324 // try {
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325 // consumer.end(file, paramObj);
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326 // } catch (IOException ex) {
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327 // log.warn(MqManager.class, ex, null);
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328 // }
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329 }
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330 }
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331 }
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332 }