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annotate src/org/tmatesoft/hg/repo/HgWorkingCopyStatusCollector.java @ 115:c0cc2535462c

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Introduced channels to pipeline (and easily filter) data streams
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 03 Feb 2011 23:32:08 +0100
parents a3a2e5deb320
children 6c0be854d149
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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19 import static org.tmatesoft.hg.repo.HgRepository.BAD_REVISION;
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20 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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22 import java.io.BufferedInputStream;
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23 import java.io.File;
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24 import java.io.FileInputStream;
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25 import java.io.IOException;
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26 import java.util.Collections;
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27 import java.util.Set;
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28 import java.util.TreeSet;
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30 import org.tmatesoft.hg.core.Nodeid;
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31 import org.tmatesoft.hg.repo.HgStatusCollector.ManifestRevisionInspector;
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32 import org.tmatesoft.hg.util.FileWalker;
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33 import org.tmatesoft.hg.util.PathPool;
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34 import org.tmatesoft.hg.util.PathRewrite;
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36 /**
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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 HgWorkingCopyStatusCollector {
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43 private final HgRepository repo;
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44 private final FileWalker repoWalker;
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45 private HgDirstate dirstate;
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46 private HgStatusCollector baseRevisionCollector;
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47 private PathPool pathPool;
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48
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49 public HgWorkingCopyStatusCollector(HgRepository hgRepo) {
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50 this(hgRepo, hgRepo.createWorkingDirWalker());
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51 }
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52
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53 HgWorkingCopyStatusCollector(HgRepository hgRepo, FileWalker hgRepoWalker) {
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54 this.repo = hgRepo;
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55 this.repoWalker = hgRepoWalker;
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56 }
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58 /**
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59 * Optionally, supply a collector instance that may cache (or have already cached) base revision
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60 * @param sc may be null
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61 */
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62 public void setBaseRevisionCollector(HgStatusCollector sc) {
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63 baseRevisionCollector = sc;
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64 }
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66 /*package-local*/ PathPool getPathPool() {
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67 if (pathPool == null) {
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68 if (baseRevisionCollector == null) {
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69 pathPool = new PathPool(new PathRewrite.Empty());
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70 } else {
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71 return baseRevisionCollector.getPathPool();
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72 }
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73 }
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74 return pathPool;
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75 }
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77 public void setPathPool(PathPool pathPool) {
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78 this.pathPool = pathPool;
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79 }
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82 private HgDirstate getDirstate() {
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83 if (dirstate == null) {
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84 dirstate = repo.loadDirstate();
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85 }
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86 return dirstate;
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87 }
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89 // may be invoked few times
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90 public void walk(int baseRevision, HgStatusInspector inspector) {
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91 final HgIgnore hgIgnore = repo.getIgnore();
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92 TreeSet<String> knownEntries = getDirstate().all();
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93 final boolean isTipBase;
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94 if (baseRevision == TIP) {
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95 baseRevision = repo.getManifest().getRevisionCount() - 1;
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96 isTipBase = true;
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97 } else {
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98 isTipBase = baseRevision == repo.getManifest().getRevisionCount() - 1;
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99 }
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100 HgStatusCollector.ManifestRevisionInspector collect = null;
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101 Set<String> baseRevFiles = Collections.emptySet();
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102 if (!isTipBase) {
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103 if (baseRevisionCollector != null) {
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104 collect = baseRevisionCollector.raw(baseRevision);
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105 } else {
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106 collect = new HgStatusCollector.ManifestRevisionInspector();
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107 repo.getManifest().walk(baseRevision, baseRevision, collect);
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108 }
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109 baseRevFiles = new TreeSet<String>(collect.files());
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110 }
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111 if (inspector instanceof HgStatusCollector.Record) {
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112 HgStatusCollector sc = baseRevisionCollector == null ? new HgStatusCollector(repo) : baseRevisionCollector;
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113 ((HgStatusCollector.Record) inspector).init(baseRevision, BAD_REVISION, sc);
68
0e499fed9b3d StatusCommand with tests. Extra constants to indicate common revision cases
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114 }
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115 repoWalker.reset();
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116 final PathPool pp = getPathPool();
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117 while (repoWalker.hasNext()) {
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118 repoWalker.next();
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119 String fname = repoWalker.name();
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120 File f = repoWalker.file();
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121 if (hgIgnore.isIgnored(fname)) {
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122 inspector.ignored(pp.path(fname));
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123 } else if (knownEntries.remove(fname)) {
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124 // modified, added, removed, clean
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125 if (collect != null) { // need to check against base revision, not FS file
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126 checkLocalStatusAgainstBaseRevision(baseRevFiles, collect, baseRevision, fname, f, inspector);
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127 baseRevFiles.remove(fname);
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128 } else {
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129 checkLocalStatusAgainstFile(fname, f, inspector);
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130 }
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131 } else {
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132 inspector.unknown(pp.path(fname));
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133 }
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134 }
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135 if (collect != null) {
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136 for (String r : baseRevFiles) {
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137 inspector.removed(pp.path(r));
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138 }
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139 }
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140 for (String m : knownEntries) {
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141 // missing known file from a working dir
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142 if (getDirstate().checkRemoved(m) == null) {
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143 // not removed from the repository = 'deleted'
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144 inspector.missing(pp.path(m));
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145 } else {
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146 // removed from the repo
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147 // if we check against non-tip revision, do not report files that were added past that revision and now removed.
658fa6b3a371 Fixed a defect when a file added and removed past some revision was reported as R for status against that rev
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148 if (collect == null || baseRevFiles.contains(m)) {
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149 inspector.removed(pp.path(m));
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150 }
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151 }
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152 }
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153 }
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154
94
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155 public HgStatusCollector.Record status(int baseRevision) {
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156 HgStatusCollector.Record rv = new HgStatusCollector.Record();
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157 walk(baseRevision, rv);
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158 return rv;
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159 }
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160
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161 //********************************************
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162
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163
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164 private void checkLocalStatusAgainstFile(String fname, File f, HgStatusInspector inspector) {
58
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165 HgDirstate.Record r;
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166 if ((r = getDirstate().checkNormal(fname)) != null) {
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167 // either clean or modified
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168 if (f.lastModified() / 1000 == r.time && r.size == f.length()) {
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169 inspector.clean(getPathPool().path(fname));
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170 } else {
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171 // FIXME check actual content to avoid false modified files
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172 inspector.modified(getPathPool().path(fname));
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173 }
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174 } else if ((r = getDirstate().checkAdded(fname)) != null) {
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175 if (r.name2 == null) {
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176 inspector.added(getPathPool().path(fname));
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177 } else {
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178 inspector.copied(getPathPool().path(r.name2), getPathPool().path(fname));
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179 }
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180 } else if ((r = getDirstate().checkRemoved(fname)) != null) {
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181 inspector.removed(getPathPool().path(fname));
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182 } else if ((r = getDirstate().checkMerged(fname)) != null) {
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183 inspector.modified(getPathPool().path(fname));
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184 }
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185 }
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186
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187 // XXX refactor checkLocalStatus methods in more OO way
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188 private void checkLocalStatusAgainstBaseRevision(Set<String> baseRevNames, ManifestRevisionInspector collect, int baseRevision, String fname, File f, HgStatusInspector inspector) {
58
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189 // fname is in the dirstate, either Normal, Added, Removed or Merged
89
42bcb4bffd17 Refactored to simplify manifest collector
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190 Nodeid nid1 = collect.nodeid(fname);
42bcb4bffd17 Refactored to simplify manifest collector
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191 String flags = collect.flags(fname);
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192 HgDirstate.Record r;
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193 if (nid1 == null) {
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194 // normal: added?
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195 // added: not known at the time of baseRevision, shall report
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196 // merged: was not known, report as added?
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197 if ((r = getDirstate().checkNormal(fname)) != null) {
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198 String origin = HgStatusCollector.getOriginIfCopy(repo, fname, baseRevNames, baseRevision);
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199 if (origin != null) {
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200 inspector.copied(getPathPool().path(origin), getPathPool().path(fname));
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diff changeset
201 return;
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202 }
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203 } else if ((r = getDirstate().checkAdded(fname)) != null) {
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204 if (r.name2 != null && baseRevNames.contains(r.name2)) {
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205 baseRevNames.remove(r.name2); // XXX surely I shall not report rename source as Removed?
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diff changeset
206 inspector.copied(getPathPool().path(r.name2), getPathPool().path(fname));
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207 return;
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208 }
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209 // fall-through, report as added
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210 } else if (getDirstate().checkRemoved(fname) != null) {
58
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diff changeset
211 // removed: removed file was not known at the time of baseRevision, and we should not report it as removed
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212 return;
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213 }
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214 inspector.added(getPathPool().path(fname));
58
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215 } else {
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216 // was known; check whether clean or modified
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217 // 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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diff changeset
218 if ((r = getDirstate().checkNormal(fname)) != null || (r = getDirstate().checkMerged(fname)) != null || (r = getDirstate().checkAdded(fname)) != null) {
58
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219 // either clean or modified
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220 HgDataFile fileNode = repo.getFileNode(fname);
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221 final int lengthAtRevision = fileNode.length(nid1);
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222 if (r.size /* XXX File.length() ?! */ != lengthAtRevision || flags != todoGenerateFlags(fname /*java.io.File*/)) {
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223 inspector.modified(getPathPool().path(fname));
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224 } else {
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225 // check actual content to see actual changes
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226 // XXX consider adding HgDataDile.compare(File/byte[]/whatever) operation to optimize comparison
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227 if (areTheSame(f, fileNode.content(nid1))) {
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228 inspector.clean(getPathPool().path(fname));
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229 } else {
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230 inspector.modified(getPathPool().path(fname));
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231 }
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232 }
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233 }
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234 // only those left in idsMap after processing are reported as removed
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235 }
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236
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237 // 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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238 // 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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239 // 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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240 // changeset nodeid + hash(actual content) => entry (Nodeid) in the next Manifest
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241 // 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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242 // The question is whether original Hg treats this case (same content, different parents and hence nodeids) as 'modified' or 'clean'
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243 }
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244
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245 private static String todoGenerateFlags(String fname) {
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246 // FIXME implement
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247 return null;
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248 }
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249 private static boolean areTheSame(File f, byte[] data) {
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250 try {
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251 BufferedInputStream is = new BufferedInputStream(new FileInputStream(f));
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252 int i = 0;
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253 while (i < data.length && data[i] == is.read()) {
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254 i++; // increment only for successful match, otherwise won't tell last byte in data was the same as read from the stream
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255 }
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256 return i == data.length && is.read() == -1; // although data length is expected to be the same (see caller), check that we reached EOF, no more data left.
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257 } catch (IOException ex) {
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258 ex.printStackTrace(); // log warn
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259 }
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260 return false;
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261 }
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262
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263 }