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annotate src/org/tmatesoft/hg/repo/ext/MqManager.java @ 464:1a3c18d57a8e smartgit3

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MqManager evolution: same PatchRecord instances, list patch queues, detect active queue
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 21 Jun 2012 20:27:58 +0200
parents a0507a9f3da0
children 2078692eeb58
rev   line source
463
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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 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.ArrayList;
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24 import java.util.Collection;
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25 import java.util.Collections;
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26 import java.util.HashMap;
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27 import java.util.LinkedList;
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28 import java.util.List;
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29 import java.util.Map;
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30
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31 import org.tmatesoft.hg.core.HgInvalidControlFileException;
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32 import org.tmatesoft.hg.core.HgInvalidFileException;
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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.HgRepository;
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36 import org.tmatesoft.hg.util.LogFacility;
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37 import org.tmatesoft.hg.util.Path;
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38
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39 /**
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40 * Mercurial Queues Support.
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41 * Access to MqExtension functionality.
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42 *
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43 * @author Artem Tikhomirov
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44 * @author TMate Software Ltd.
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45 */
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46 public class MqManager {
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47
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48 private final HgRepository repo;
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49 private List<PatchRecord> applied = Collections.emptyList();
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50 private List<PatchRecord> allKnown = Collections.emptyList();
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51 private List<String> queueNames = Collections.emptyList();
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52 private String activeQueue = "patches";
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53
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54 public MqManager(HgRepository hgRepo) {
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55 repo = hgRepo;
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56 }
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57
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58 /**
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59 * Updates manager with up-to-date state of the mercurial queues.
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60 */
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61 public void refresh() throws HgInvalidControlFileException {
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62 applied = allKnown = Collections.emptyList();
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63 queueNames = Collections.emptyList();
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64 File repoDir = HgInternals.getRepositoryDir(repo);
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65 final LogFacility log = HgInternals.getContext(repo).getLog();
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66 final File fileStatus = new File(repoDir, "patches/status");
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67 final File fileSeries = new File(repoDir, "patches/series");
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68 try {
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69 File queues = new File(repoDir, "patches.queues");
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70 if (queues.isFile()) {
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71 LineReader lr = new LineReader(queues, log).trimLines(true).skipEmpty(true);
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72 lr.read(new SimpleLineCollector(), queueNames = new LinkedList<String>());
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73 }
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74 File activeQueueFile = new File(repoDir, "patches.queue");
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75 ArrayList<String> contents = new ArrayList<String>();
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76 if (activeQueueFile.isFile()) {
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77 new LineReader(activeQueueFile, log).read(new SimpleLineCollector(), contents);
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78 if (contents.isEmpty()) {
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79 log.warn(getClass(), "File %s with active queue name is empty", activeQueueFile.getName());
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80 activeQueue = "patches";
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81 } else {
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82 activeQueue = contents.get(0);
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83 }
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84 } else {
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85 activeQueue = "patches";
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86 }
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87 if (fileStatus.isFile()) {
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88 new LineReader(fileStatus, log).read(new LineConsumer<List<PatchRecord>>() {
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89
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90 public boolean consume(String line, List<PatchRecord> result) throws IOException {
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91 int sep = line.indexOf(':');
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92 if (sep == -1) {
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93 log.warn(MqManager.class, "Bad line in %s:%s", fileStatus.getPath(), line);
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94 return true;
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95 }
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96 Nodeid nid = Nodeid.fromAscii(line.substring(0, sep));
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97 String name = new String(line.substring(sep+1));
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98 result.add(new PatchRecord(nid, name, Path.create(".hg/patches/" + name)));
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99 return true;
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100 }
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101 }, applied = new LinkedList<PatchRecord>());
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102 }
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103 if (fileSeries.isFile()) {
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104 final Map<String,PatchRecord> name2patch = new HashMap<String, PatchRecord>();
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105 for (PatchRecord pr : applied) {
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106 name2patch.put(pr.getName(), pr);
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107 }
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108 LinkedList<String> knownPatchNames = new LinkedList<String>();
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109 new LineReader(fileSeries, log).read(new SimpleLineCollector(), knownPatchNames);
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110 // XXX read other queues?
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111 allKnown = new ArrayList<PatchRecord>(knownPatchNames.size());
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112 for (String name : knownPatchNames) {
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113 PatchRecord pr = name2patch.get(name);
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114 if (pr == null) {
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115 pr = new PatchRecord(null, name, Path.create(".hg/patches/" + name));
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116 }
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117 allKnown.add(pr);
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118 }
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119 }
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120 } catch (HgInvalidFileException ex) {
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121 HgInvalidControlFileException th = new HgInvalidControlFileException(ex.getMessage(), ex.getCause(), ex.getFile());
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122 th.setStackTrace(ex.getStackTrace());
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123 throw th;
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124 }
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125 }
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126
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127 static class SimpleLineCollector implements LineConsumer<Collection<String>> {
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128
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129 public boolean consume(String line, Collection<String> result) throws IOException {
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130 result.add(line);
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131 return true;
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132 }
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133 }
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134
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135 /**
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136 * Number of patches not yet applied
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137 * @return positive value when there are
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138 */
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139 public int getQueueSize() {
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140 return getAllKnownPatches().size() - getAppliedPatches().size();
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141 }
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142
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143 /**
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144 * Subset of the patches from the queue that were already applied to the repository
464
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145 * <p>Analog of 'hg qapplied'
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146 *
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147 * <p>Clients shall call {@link #refresh()} prior to first use
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148 * @return collection of records in no particular order, may be empty if none applied
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149 */
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150 public List<PatchRecord> getAppliedPatches() {
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151 return Collections.unmodifiableList(applied);
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152 }
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153
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154 /**
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155 * All of the patches that MQ knows about for this repository
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156 *
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157 * <p>Clients shall call {@link #refresh()} prior to first use
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158 * @return collection of records in no particular order, may be empty if there are no patches in the queue
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159 */
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160 public List<PatchRecord> getAllKnownPatches() {
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161 return Collections.unmodifiableList(allKnown);
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162 }
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163
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164 /**
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165 * Name of the patch queue <code>hg qqueue --active</code> which is active now.
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166 * @return patch queue name
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167 */
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168 public String getActiveQueueName() {
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169 return activeQueue;
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170 }
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171
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172 /**
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173 * Patch queues known in the repository, <code>hg qqueue -l</code> analog.
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174 * There's at least one patch queue (default one names 'patches'). Only one patch queue at a time is active.
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175 *
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176 * @return names of patch queues
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177 */
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178 public List<String> getQueueNames() {
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179 return Collections.unmodifiableList(queueNames);
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180 }
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181
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182 public class PatchRecord {
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183 private final Nodeid nodeid;
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184 private final String name;
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185 private final Path location;
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186
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187 // hashCode/equals might be useful if cons becomes public
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188
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189 PatchRecord(Nodeid revision, String name, Path diffLocation) {
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190 nodeid = revision;
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191 this.name = name;
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192 this.location = diffLocation;
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193 }
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194
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195 /**
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196 * Identifies changeset of the patch that has been applied to the repository
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197 *
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198 * @return changeset revision or <code>null</code> if this patch is not yet applied
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199 */
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200 public Nodeid getRevision() {
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201 return nodeid;
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202 }
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203
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204 /**
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205 * Identifies patch, either based on a user-supplied name (<code>hg qnew <i>patch-name</i></code>) or
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206 * an automatically generated name (like <code><i>revisionIndex</i>.diff</code> for imported changesets).
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207 * Clients shall not rely on this naming scheme, though.
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208 *
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209 * @return never <code>null</code>
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210 */
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211 public String getName() {
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212 return name;
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213 }
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214
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215 /**
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216 * Location of diff file with the patch, relative to repository root
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217 * @return path to the patch, never <code>null</code>
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218 */
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219 public Path getPatchLocation() {
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220 return location;
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221 }
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222 }
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223
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224 // TODO refine API and extract into separate classes
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225
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226 interface LineConsumer<T> {
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227 // boolean begin(File f, T paramObj) throws IOException;
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228 boolean consume(String line, T paramObj) throws IOException;
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229 // boolean end(File f, T paramObj) throws IOException;
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230 }
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231
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232 class LineReader {
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233
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234 private final File file;
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235 private final LogFacility log;
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236 private boolean trimLines = true;
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237 private boolean skipEmpty = true;
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238 private String ignoreThatStars = null;
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239
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240 LineReader(File f, LogFacility logFacility) {
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241 file = f;
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242 log = logFacility;
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243 }
464
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244
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245 /**
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246 * default: <code>true</code>
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247 * <code>false</code> to return line as is
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248 */
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249 LineReader trimLines(boolean trim) {
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250 trimLines = trim;
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251 return this;
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252 }
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253
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254 /**
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255 * default: <code>true</code>
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256 * <code>false</code> to pass empty lines to consumer
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257 */
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258 LineReader skipEmpty(boolean skip) {
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259 skipEmpty = skip;
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260 return this;
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261 }
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262
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263 /**
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264 * default: doesn't skip any line.
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265 * set e.g. to "#" or "//" to skip lines that start with such prefix
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266 */
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267 LineReader ignoreLineComments(String lineStart) {
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268 ignoreThatStars = lineStart;
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269 return this;
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270 }
463
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271
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272 <T> void read(LineConsumer<T> consumer, T paramObj) throws HgInvalidFileException {
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273 BufferedReader statusFileReader = null;
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274 try {
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275 // consumer.begin(file, paramObj);
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276 statusFileReader = new BufferedReader(new FileReader(file));
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277 String line;
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278 boolean ok = true;
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279 while (ok && (line = statusFileReader.readLine()) != null) {
464
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280 if (trimLines) {
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281 line = line.trim();
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282 }
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283 if (ignoreThatStars != null && line.startsWith(ignoreThatStars)) {
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284 continue;
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285 }
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286 if (!skipEmpty || line.length() > 0) {
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287 ok = consumer.consume(line, paramObj);
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288 }
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289 }
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290 } catch (IOException ex) {
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291 throw new HgInvalidFileException(ex.getMessage(), ex, file);
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292 } finally {
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293 try {
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294 statusFileReader.close();
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295 } catch (IOException ex) {
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296 log.warn(MqManager.class, ex, null);
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297 }
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298 // try {
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299 // consumer.end(file, paramObj);
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300 // } catch (IOException ex) {
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301 // log.warn(MqManager.class, ex, null);
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302 // }
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303 }
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304 }
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305 }
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306 }