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annotate src/org/tmatesoft/hg/repo/HgWorkingCopyStatusCollector.java @ 120:b19f0ac5ee62

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Check against working copy shall expect non-persistent modifications done by filters and not report such files as modified
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 04 Feb 2011 03:23:47 +0100
parents 6c0be854d149
children 4a948ec83980
rev   line source
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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.repo;
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18
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19 import static java.lang.Math.max;
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20 import static java.lang.Math.min;
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21 import static org.tmatesoft.hg.repo.HgRepository.BAD_REVISION;
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22 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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24 import java.io.File;
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25 import java.io.FileInputStream;
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26 import java.io.IOException;
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27 import java.nio.ByteBuffer;
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28 import java.nio.channels.FileChannel;
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29 import java.util.Collections;
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30 import java.util.Set;
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31 import java.util.TreeSet;
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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.core.Path;
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35 import org.tmatesoft.hg.internal.FilterByteChannel;
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36 import org.tmatesoft.hg.repo.HgStatusCollector.ManifestRevisionInspector;
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37 import org.tmatesoft.hg.util.ByteChannel;
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38 import org.tmatesoft.hg.util.FileWalker;
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39 import org.tmatesoft.hg.util.PathPool;
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40 import org.tmatesoft.hg.util.PathRewrite;
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42 /**
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43 *
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44 * @author Artem Tikhomirov
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45 * @author TMate Software Ltd.
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46 */
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47 public class HgWorkingCopyStatusCollector {
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48
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49 private final HgRepository repo;
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50 private final FileWalker repoWalker;
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51 private HgDirstate dirstate;
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52 private HgStatusCollector baseRevisionCollector;
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53 private PathPool pathPool;
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54
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55 public HgWorkingCopyStatusCollector(HgRepository hgRepo) {
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56 this(hgRepo, hgRepo.createWorkingDirWalker());
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57 }
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59 HgWorkingCopyStatusCollector(HgRepository hgRepo, FileWalker hgRepoWalker) {
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60 this.repo = hgRepo;
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61 this.repoWalker = hgRepoWalker;
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62 }
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64 /**
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65 * Optionally, supply a collector instance that may cache (or have already cached) base revision
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66 * @param sc may be null
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67 */
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68 public void setBaseRevisionCollector(HgStatusCollector sc) {
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69 baseRevisionCollector = sc;
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70 }
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72 /*package-local*/ PathPool getPathPool() {
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73 if (pathPool == null) {
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74 if (baseRevisionCollector == null) {
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75 pathPool = new PathPool(new PathRewrite.Empty());
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76 } else {
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77 return baseRevisionCollector.getPathPool();
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78 }
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79 }
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80 return pathPool;
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81 }
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82
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83 public void setPathPool(PathPool pathPool) {
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84 this.pathPool = pathPool;
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85 }
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86
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88 private HgDirstate getDirstate() {
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89 if (dirstate == null) {
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90 dirstate = repo.loadDirstate();
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91 }
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92 return dirstate;
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93 }
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95 // may be invoked few times
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96 public void walk(int baseRevision, HgStatusInspector inspector) {
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97 final HgIgnore hgIgnore = repo.getIgnore();
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98 TreeSet<String> knownEntries = getDirstate().all();
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99 final boolean isTipBase;
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100 if (baseRevision == TIP) {
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101 baseRevision = repo.getManifest().getRevisionCount() - 1;
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102 isTipBase = true;
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103 } else {
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104 isTipBase = baseRevision == repo.getManifest().getRevisionCount() - 1;
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105 }
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106 HgStatusCollector.ManifestRevisionInspector collect = null;
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107 Set<String> baseRevFiles = Collections.emptySet();
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108 if (!isTipBase) {
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109 if (baseRevisionCollector != null) {
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110 collect = baseRevisionCollector.raw(baseRevision);
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111 } else {
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112 collect = new HgStatusCollector.ManifestRevisionInspector();
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113 repo.getManifest().walk(baseRevision, baseRevision, collect);
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114 }
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115 baseRevFiles = new TreeSet<String>(collect.files());
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116 }
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117 if (inspector instanceof HgStatusCollector.Record) {
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118 HgStatusCollector sc = baseRevisionCollector == null ? new HgStatusCollector(repo) : baseRevisionCollector;
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119 ((HgStatusCollector.Record) inspector).init(baseRevision, BAD_REVISION, sc);
68
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120 }
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121 repoWalker.reset();
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122 final PathPool pp = getPathPool();
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123 while (repoWalker.hasNext()) {
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124 repoWalker.next();
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125 String fname = repoWalker.name();
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126 File f = repoWalker.file();
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127 if (hgIgnore.isIgnored(fname)) {
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128 inspector.ignored(pp.path(fname));
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129 } else if (knownEntries.remove(fname)) {
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130 // modified, added, removed, clean
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131 if (collect != null) { // need to check against base revision, not FS file
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132 checkLocalStatusAgainstBaseRevision(baseRevFiles, collect, baseRevision, fname, f, inspector);
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133 baseRevFiles.remove(fname);
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134 } else {
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135 checkLocalStatusAgainstFile(fname, f, inspector);
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136 }
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137 } else {
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138 inspector.unknown(pp.path(fname));
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139 }
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140 }
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141 if (collect != null) {
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142 for (String r : baseRevFiles) {
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143 inspector.removed(pp.path(r));
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144 }
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145 }
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146 for (String m : knownEntries) {
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147 // missing known file from a working dir
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148 if (getDirstate().checkRemoved(m) == null) {
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149 // not removed from the repository = 'deleted'
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150 inspector.missing(pp.path(m));
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151 } else {
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152 // removed from the repo
76
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153 // if we check against non-tip revision, do not report files that were added past that revision and now removed.
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154 if (collect == null || baseRevFiles.contains(m)) {
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155 inspector.removed(pp.path(m));
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156 }
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157 }
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158 }
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159 }
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160
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161 public HgStatusCollector.Record status(int baseRevision) {
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162 HgStatusCollector.Record rv = new HgStatusCollector.Record();
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163 walk(baseRevision, rv);
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164 return rv;
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165 }
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166
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167 //********************************************
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168
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169
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170 private void checkLocalStatusAgainstFile(String fname, File f, HgStatusInspector inspector) {
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171 HgDirstate.Record r;
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172 if ((r = getDirstate().checkNormal(fname)) != null) {
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173 // either clean or modified
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174 if (f.lastModified() / 1000 == r.time && r.size == f.length()) {
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175 inspector.clean(getPathPool().path(fname));
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176 } else {
120
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177 // check actual content to avoid false modified files
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178 HgDataFile df = repo.getFileNode(fname);
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179 if (!areTheSame(f, df.content(), df.getPath())) {
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180 inspector.modified(df.getPath());
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181 }
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182 }
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183 } else if ((r = getDirstate().checkAdded(fname)) != null) {
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184 if (r.name2 == null) {
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185 inspector.added(getPathPool().path(fname));
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186 } else {
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187 inspector.copied(getPathPool().path(r.name2), getPathPool().path(fname));
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188 }
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189 } else if ((r = getDirstate().checkRemoved(fname)) != null) {
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190 inspector.removed(getPathPool().path(fname));
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191 } else if ((r = getDirstate().checkMerged(fname)) != null) {
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192 inspector.modified(getPathPool().path(fname));
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193 }
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194 }
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195
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196 // XXX refactor checkLocalStatus methods in more OO way
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197 private void checkLocalStatusAgainstBaseRevision(Set<String> baseRevNames, ManifestRevisionInspector collect, int baseRevision, String fname, File f, HgStatusInspector inspector) {
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198 // fname is in the dirstate, either Normal, Added, Removed or Merged
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199 Nodeid nid1 = collect.nodeid(fname);
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200 String flags = collect.flags(fname);
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201 HgDirstate.Record r;
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202 if (nid1 == null) {
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203 // normal: added?
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204 // added: not known at the time of baseRevision, shall report
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205 // merged: was not known, report as added?
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206 if ((r = getDirstate().checkNormal(fname)) != null) {
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207 String origin = HgStatusCollector.getOriginIfCopy(repo, fname, baseRevNames, baseRevision);
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208 if (origin != null) {
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209 inspector.copied(getPathPool().path(origin), getPathPool().path(fname));
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210 return;
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211 }
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212 } else if ((r = getDirstate().checkAdded(fname)) != null) {
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213 if (r.name2 != null && baseRevNames.contains(r.name2)) {
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214 baseRevNames.remove(r.name2); // XXX surely I shall not report rename source as Removed?
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215 inspector.copied(getPathPool().path(r.name2), getPathPool().path(fname));
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216 return;
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217 }
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218 // fall-through, report as added
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219 } else if (getDirstate().checkRemoved(fname) != null) {
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220 // removed: removed file was not known at the time of baseRevision, and we should not report it as removed
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221 return;
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222 }
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223 inspector.added(getPathPool().path(fname));
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224 } else {
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225 // was known; check whether clean or modified
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226 // when added - seems to be the case of a file added once again, hence need to check if content is different
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227 if ((r = getDirstate().checkNormal(fname)) != null || (r = getDirstate().checkMerged(fname)) != null || (r = getDirstate().checkAdded(fname)) != null) {
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228 // either clean or modified
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229 HgDataFile fileNode = repo.getFileNode(fname);
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230 final int lengthAtRevision = fileNode.length(nid1);
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231 if (r.size /* XXX File.length() ?! */ != lengthAtRevision || flags != todoGenerateFlags(fname /*java.io.File*/)) {
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232 inspector.modified(getPathPool().path(fname));
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233 } else {
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234 // check actual content to see actual changes
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235 // XXX consider adding HgDataDile.compare(File/byte[]/whatever) operation to optimize comparison
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236 if (areTheSame(f, fileNode.content(nid1), fileNode.getPath())) {
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237 inspector.clean(getPathPool().path(fname));
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238 } else {
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239 inspector.modified(getPathPool().path(fname));
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240 }
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241 }
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242 }
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243 // only those left in idsMap after processing are reported as removed
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244 }
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245
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246 // TODO think over if content comparison may be done more effectively by e.g. calculating nodeid for a local file and comparing it with nodeid from manifest
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247 // we don't need to tell exact difference, hash should be enough to detect difference, and it doesn't involve reading historical file content, and it's relatively
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248 // cheap to calc hash on a file (no need to keep it completely in memory). OTOH, if I'm right that the next approach is used for nodeids:
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249 // changeset nodeid + hash(actual content) => entry (Nodeid) in the next Manifest
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250 // then it's sufficient to check parents from dirstate, and if they do not match parents from file's baseRevision (non matching parents means different nodeids).
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251 // The question is whether original Hg treats this case (same content, different parents and hence nodeids) as 'modified' or 'clean'
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252 }
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253
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254 private boolean areTheSame(File f, final byte[] data, Path p) {
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255 FileInputStream fis = null;
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256 try {
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257 try {
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258 fis = new FileInputStream(f);
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259 FileChannel fc = fis.getChannel();
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260 ByteBuffer fb = ByteBuffer.allocate(min(data.length, 8192));
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261 final boolean[] checkValue = new boolean[] { true };
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262 ByteChannel check = new ByteChannel() {
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263 int x = 0;
120
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264 final boolean debug = false; // XXX may want to add global variable to allow clients to turn
117
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265 public int write(ByteBuffer buffer) throws Exception {
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266 for (int i = buffer.remaining(); i > 0; i--, x++) {
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267 if (data[x] != buffer.get()) {
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268 if (debug) {
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269 byte[] xx = new byte[15];
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270 if (buffer.position() > 5) {
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271 buffer.position(buffer.position() - 5);
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272 }
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273 buffer.get(xx);
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274 System.out.print("expected >>" + new String(data, max(0, x - 4), 20) + "<< but got >>");
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275 System.out.println(new String(xx) + "<<");
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276 }
117
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277 checkValue[0] = false;
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278 break;
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279 }
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280 }
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281 buffer.position(buffer.limit()); // mark as read
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282 return buffer.limit();
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283 }
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284 };
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285 FilterByteChannel filters = new FilterByteChannel(check, repo.getFiltersFromWorkingDirToRepo(p));
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286 while (fc.read(fb) != -1 && checkValue[0]) {
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287 fb.flip();
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288 filters.write(fb);
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289 fb.compact();
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290 }
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291 return checkValue[0];
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292 } catch (IOException ex) {
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293 if (fis != null) {
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294 fis.close();
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295 }
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296 ex.printStackTrace(); // log warn
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297 }
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298 } catch (/*TODO typed*/Exception ex) {
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299 ex.printStackTrace();
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300 }
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301 return false;
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302 }
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303
58
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304 private static String todoGenerateFlags(String fname) {
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305 // FIXME implement
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306 return null;
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307 }
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308
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309 }