Mercurial > jhg
annotate src/org/tmatesoft/hg/core/HgManifestCommand.java @ 246:ff4fdbab4e2d
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author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 11 Aug 2011 05:12:13 +0200 |
parents | 1792b37650f2 |
children | 4c3b9f679412 |
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1 /* |
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2 * Copyright (c) 2011 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.core; |
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18 |
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19 import static org.tmatesoft.hg.repo.HgRepository.*; |
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20 import static org.tmatesoft.hg.repo.HgRepository.BAD_REVISION; |
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21 import static org.tmatesoft.hg.repo.HgRepository.TIP; |
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22 |
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23 import java.util.ConcurrentModificationException; |
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24 import java.util.LinkedHashMap; |
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25 import java.util.LinkedList; |
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26 import java.util.List; |
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27 |
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28 import org.tmatesoft.hg.repo.HgManifest; |
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29 import org.tmatesoft.hg.repo.HgRepository; |
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30 import org.tmatesoft.hg.util.Path; |
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31 import org.tmatesoft.hg.util.PathPool; |
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32 import org.tmatesoft.hg.util.PathRewrite; |
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33 |
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34 |
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35 /** |
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36 * Gives access to list of files in each revision (Mercurial manifest information), 'hg manifest' counterpart. |
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37 * |
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38 * @author Artem Tikhomirov |
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39 * @author TMate Software Ltd. |
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40 */ |
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41 public class HgManifestCommand extends HgAbstractCommand<HgManifestCommand> { |
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42 |
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43 private final HgRepository repo; |
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44 private Path.Matcher matcher; |
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45 private int startRev = 0, endRev = TIP; |
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46 private Handler visitor; |
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47 private boolean needDirs = false; |
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48 |
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49 private final Mediator mediator = new Mediator(); |
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50 |
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51 public HgManifestCommand(HgRepository hgRepo) { |
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52 repo = hgRepo; |
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53 } |
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54 |
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55 /** |
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56 * Parameterize command to visit revisions <code>[rev1..rev2]</code>. |
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57 * @param rev1 - local revision number to start from. Non-negative. May be {@link HgRepository#TIP} (rev2 argument shall be {@link HgRepository#TIP} as well, then) |
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58 * @param rev2 - local revision number to end with, inclusive. Non-negative, greater or equal to rev1. May be {@link HgRepository#TIP}. |
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59 * @return <code>this</code> for convenience. |
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60 * @throws IllegalArgumentException if revision arguments are incorrect (see above). |
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61 */ |
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62 public HgManifestCommand range(int rev1, int rev2) { |
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63 // XXX if manifest range is different from that of changelog, need conversion utils (external?) |
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64 boolean badArgs = rev1 == BAD_REVISION || rev2 == BAD_REVISION || rev1 == WORKING_COPY || rev2 == WORKING_COPY; |
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65 badArgs |= rev2 != TIP && rev2 < rev1; // range(3, 1); |
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66 badArgs |= rev1 == TIP && rev2 != TIP; // range(TIP, 2), although this may be legitimate when TIP points to 2 |
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67 if (badArgs) { |
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68 throw new IllegalArgumentException(String.format("Bad range: [%d, %d]", rev1, rev2)); |
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69 } |
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70 startRev = rev1; |
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71 endRev = rev2; |
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72 return this; |
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73 } |
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74 |
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75 public HgManifestCommand revision(int rev) { |
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76 startRev = endRev = rev; |
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77 return this; |
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78 } |
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79 |
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80 public HgManifestCommand dirs(boolean include) { |
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81 // XXX whether directories with directories only are include or not |
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82 // now lists only directories with files |
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83 needDirs = include; |
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84 return this; |
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85 } |
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86 |
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87 /** |
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88 * Limit manifest walk to a subset of files. |
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89 * @param pathMatcher - filter, pass <code>null</code> to clear. |
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90 * @return <code>this</code> instance for convenience |
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91 */ |
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92 public HgManifestCommand match(Path.Matcher pathMatcher) { |
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93 matcher = pathMatcher; |
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94 return this; |
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95 } |
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96 |
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97 /** |
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98 * Runs the command. |
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99 * @param handler - callback to get the outcome |
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100 * @throws IllegalArgumentException if handler is <code>null</code> |
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101 * @throws ConcurrentModificationException if this command is already in use (running) |
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102 */ |
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103 public void execute(Handler handler) { |
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104 if (handler == null) { |
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105 throw new IllegalArgumentException(); |
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106 } |
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107 if (visitor != null) { |
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108 throw new ConcurrentModificationException(); |
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109 } |
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110 try { |
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111 visitor = handler; |
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112 mediator.start(); |
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113 repo.getManifest().walk(startRev, endRev, mediator); |
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114 } finally { |
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115 mediator.done(); |
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116 visitor = null; |
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117 } |
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118 } |
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119 |
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120 /** |
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121 * Callback to walk file/directory tree of a revision |
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122 */ |
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123 public interface Handler { |
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124 void begin(Nodeid manifestRevision); |
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125 void dir(Path p); // optionally invoked (if walker was configured to spit out directories) prior to any files from this dir and subdirs |
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126 void file(HgLogCommand.FileRevision fileRevision); // XXX allow to check p is invalid (df.exists()) |
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127 void end(Nodeid manifestRevision); |
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128 } |
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129 |
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130 // I'd rather let HgManifestCommand implement HgManifest.Inspector directly, but this pollutes API alot |
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131 private class Mediator implements HgManifest.Inspector { |
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132 // file names are likely to repeat in each revision, hence caching of Paths. |
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133 // However, once HgManifest.Inspector switches to Path objects, perhaps global Path pool |
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134 // might be more effective? |
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135 private PathPool pathPool; |
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136 private List<HgFileRevision> manifestContent; |
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137 private Nodeid manifestNodeid; |
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138 |
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139 public void start() { |
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140 // Manifest keeps normalized paths |
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141 pathPool = new PathPool(new PathRewrite.Empty()); |
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142 } |
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143 |
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144 public void done() { |
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145 manifestContent = null; |
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146 pathPool = null; |
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147 } |
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148 |
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149 public boolean begin(int manifestRevision, Nodeid nid, int changelogRevision) { |
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150 if (needDirs && manifestContent == null) { |
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151 manifestContent = new LinkedList<HgFileRevision>(); |
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152 } |
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153 visitor.begin(manifestNodeid = nid); |
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154 return true; |
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155 } |
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156 public boolean end(int revision) { |
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157 if (needDirs) { |
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158 LinkedHashMap<Path, LinkedList<HgFileRevision>> breakDown = new LinkedHashMap<Path, LinkedList<HgFileRevision>>(); |
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159 for (HgFileRevision fr : manifestContent) { |
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160 Path filePath = fr.getPath(); |
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161 Path dirPath = pathPool.parent(filePath); |
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162 LinkedList<HgFileRevision> revs = breakDown.get(dirPath); |
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163 if (revs == null) { |
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164 revs = new LinkedList<HgFileRevision>(); |
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165 breakDown.put(dirPath, revs); |
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166 } |
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167 revs.addLast(fr); |
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168 } |
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169 for (Path dir : breakDown.keySet()) { |
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170 visitor.dir(dir); |
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171 for (HgFileRevision fr : breakDown.get(dir)) { |
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172 visitor.file(fr); |
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173 } |
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174 } |
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175 manifestContent.clear(); |
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176 } |
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177 visitor.end(manifestNodeid); |
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178 manifestNodeid = null; |
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179 return true; |
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180 } |
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181 public boolean next(Nodeid nid, String fname, String flags) { |
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182 Path p = pathPool.path(fname); |
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183 if (matcher != null && !matcher.accept(p)) { |
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184 return true; |
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185 } |
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186 HgFileRevision fr = new HgFileRevision(repo, nid, p); |
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187 if (needDirs) { |
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188 manifestContent.add(fr); |
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189 } else { |
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190 visitor.file(fr); |
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191 } |
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192 return true; |
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193 } |
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194 } |
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195 } |