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annotate src/org/tmatesoft/hg/repo/HgWorkingCopyStatusCollector.java @ 196:e2115da4cf6a

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Pool objects to avoid memory polution with duplicates
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 18 Apr 2011 18:04:24 +0200
parents c9b305df0b89
children 047b1dec7a04
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.HgDataStreamException;
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34 import org.tmatesoft.hg.core.HgException;
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35 import org.tmatesoft.hg.core.Nodeid;
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36 import org.tmatesoft.hg.internal.ByteArrayChannel;
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37 import org.tmatesoft.hg.internal.FilterByteChannel;
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38 import org.tmatesoft.hg.repo.HgStatusCollector.ManifestRevisionInspector;
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39 import org.tmatesoft.hg.util.ByteChannel;
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40 import org.tmatesoft.hg.util.CancelledException;
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41 import org.tmatesoft.hg.util.FileIterator;
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42 import org.tmatesoft.hg.util.Path;
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43 import org.tmatesoft.hg.util.PathPool;
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44 import org.tmatesoft.hg.util.PathRewrite;
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46 /**
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47 *
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48 * @author Artem Tikhomirov
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49 * @author TMate Software Ltd.
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50 */
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51 public class HgWorkingCopyStatusCollector {
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53 private final HgRepository repo;
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54 private final FileIterator repoWalker;
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55 private HgDirstate dirstate;
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56 private HgStatusCollector baseRevisionCollector;
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57 private PathPool pathPool;
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59 public HgWorkingCopyStatusCollector(HgRepository hgRepo) {
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60 this(hgRepo, hgRepo.createWorkingDirWalker());
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61 }
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63 HgWorkingCopyStatusCollector(HgRepository hgRepo, FileIterator hgRepoWalker) {
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64 this.repo = hgRepo;
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65 this.repoWalker = hgRepoWalker;
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66 }
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68 /**
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69 * Optionally, supply a collector instance that may cache (or have already cached) base revision
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70 * @param sc may be null
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71 */
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72 public void setBaseRevisionCollector(HgStatusCollector sc) {
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73 baseRevisionCollector = sc;
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74 }
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76 /*package-local*/ PathPool getPathPool() {
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77 if (pathPool == null) {
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78 if (baseRevisionCollector == null) {
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79 pathPool = new PathPool(new PathRewrite.Empty());
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80 } else {
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81 return baseRevisionCollector.getPathPool();
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82 }
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83 }
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84 return pathPool;
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85 }
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86
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87 public void setPathPool(PathPool pathPool) {
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88 this.pathPool = pathPool;
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89 }
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90
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92 private HgDirstate getDirstate() {
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93 if (dirstate == null) {
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94 dirstate = repo.loadDirstate();
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95 }
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96 return dirstate;
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97 }
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99 // may be invoked few times
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100 public void walk(int baseRevision, HgStatusInspector inspector) {
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101 final HgIgnore hgIgnore = repo.getIgnore();
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102 TreeSet<String> knownEntries = getDirstate().all();
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103 final boolean isTipBase;
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104 if (baseRevision == TIP) {
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105 baseRevision = repo.getManifest().getRevisionCount() - 1;
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106 isTipBase = true;
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107 } else {
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108 isTipBase = baseRevision == repo.getManifest().getRevisionCount() - 1;
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109 }
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110 HgStatusCollector.ManifestRevisionInspector collect = null;
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111 Set<String> baseRevFiles = Collections.emptySet();
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112 if (!isTipBase) {
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113 if (baseRevisionCollector != null) {
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114 collect = baseRevisionCollector.raw(baseRevision);
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115 } else {
195
c9b305df0b89 Optimization: use ParentWalker to get changeset's parents, if possible. Do not keep duplicating nodeids and strings in manifest revisions
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116 collect = new HgStatusCollector.ManifestRevisionInspector(null, null);
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117 repo.getManifest().walk(baseRevision, baseRevision, collect);
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118 }
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42bcb4bffd17 Refactored to simplify manifest collector
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119 baseRevFiles = new TreeSet<String>(collect.files());
58
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120 }
94
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121 if (inspector instanceof HgStatusCollector.Record) {
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122 HgStatusCollector sc = baseRevisionCollector == null ? new HgStatusCollector(repo) : baseRevisionCollector;
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123 ((HgStatusCollector.Record) inspector).init(baseRevision, BAD_REVISION, sc);
68
0e499fed9b3d StatusCommand with tests. Extra constants to indicate common revision cases
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124 }
58
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125 repoWalker.reset();
93
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126 final PathPool pp = getPathPool();
58
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127 while (repoWalker.hasNext()) {
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128 repoWalker.next();
141
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129 Path fname = repoWalker.name();
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130 File f = repoWalker.file();
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131 if (hgIgnore.isIgnored(fname)) {
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132 inspector.ignored(pp.path(fname));
141
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133 } else if (knownEntries.remove(fname.toString())) {
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134 // modified, added, removed, clean
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135 if (collect != null) { // need to check against base revision, not FS file
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136 checkLocalStatusAgainstBaseRevision(baseRevFiles, collect, baseRevision, fname, f, inspector);
142
37a34044e6bd More reasonable use of path normalizer and path.source
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137 baseRevFiles.remove(fname.toString());
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138 } else {
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139 checkLocalStatusAgainstFile(fname, f, inspector);
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140 }
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141 } else {
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142 inspector.unknown(pp.path(fname));
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143 }
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144 }
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145 if (collect != null) {
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146 for (String r : baseRevFiles) {
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147 inspector.removed(pp.path(r));
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148 }
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149 }
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150 for (String m : knownEntries) {
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151 // missing known file from a working dir
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152 if (getDirstate().checkRemoved(m) == null) {
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153 // not removed from the repository = 'deleted'
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154 inspector.missing(pp.path(m));
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155 } else {
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156 // removed from the repo
76
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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157 // if we check against non-tip revision, do not report files that were added past that revision and now removed.
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158 if (collect == null || baseRevFiles.contains(m)) {
93
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159 inspector.removed(pp.path(m));
76
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160 }
58
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161 }
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162 }
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163 }
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164
94
af1f3b78b918 *StatusCollector renamed to Hg*StatusCollector
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165 public HgStatusCollector.Record status(int baseRevision) {
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166 HgStatusCollector.Record rv = new HgStatusCollector.Record();
58
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167 walk(baseRevision, rv);
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168 return rv;
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169 }
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170
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171 //********************************************
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172
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173
141
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174 private void checkLocalStatusAgainstFile(Path fname, File f, HgStatusInspector inspector) {
58
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175 HgDirstate.Record r;
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176 if ((r = getDirstate().checkNormal(fname)) != null) {
58
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177 // either clean or modified
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178 if (f.lastModified() / 1000 == r.time && r.size == f.length()) {
93
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179 inspector.clean(getPathPool().path(fname));
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180 } else {
120
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181 // check actual content to avoid false modified files
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182 HgDataFile df = repo.getFileNode(fname);
157
d5268ca7715b Merged branch wrap-data-access into default for resource-friendly data access. Updated API to promote that friendliness to clients (channels, not byte[]). More exceptions
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183 if (!areTheSame(f, df, HgRepository.TIP)) {
120
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184 inspector.modified(df.getPath());
180
42fe9a94b9d0 Report files as clean when no difference but timestamp found
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185 } else {
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diff changeset
186 inspector.clean(df.getPath());
120
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187 }
58
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188 }
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189 } else if ((r = getDirstate().checkAdded(fname)) != null) {
58
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190 if (r.name2 == null) {
93
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191 inspector.added(getPathPool().path(fname));
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192 } else {
93
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193 inspector.copied(getPathPool().path(r.name2), getPathPool().path(fname));
58
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194 }
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195 } else if ((r = getDirstate().checkRemoved(fname)) != null) {
93
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196 inspector.removed(getPathPool().path(fname));
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197 } else if ((r = getDirstate().checkMerged(fname)) != null) {
93
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198 inspector.modified(getPathPool().path(fname));
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199 }
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200 }
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201
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202 // XXX refactor checkLocalStatus methods in more OO way
141
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203 private void checkLocalStatusAgainstBaseRevision(Set<String> baseRevNames, ManifestRevisionInspector collect, int baseRevision, Path fname, File f, HgStatusInspector inspector) {
58
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204 // fname is in the dirstate, either Normal, Added, Removed or Merged
141
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205 Nodeid nid1 = collect.nodeid(fname.toString());
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206 String flags = collect.flags(fname.toString());
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207 HgDirstate.Record r;
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208 if (nid1 == null) {
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209 // normal: added?
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210 // added: not known at the time of baseRevision, shall report
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211 // merged: was not known, report as added?
90
a95c700408a9 Correctly report copy/rename events for rev..working copy case
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diff changeset
212 if ((r = getDirstate().checkNormal(fname)) != null) {
157
d5268ca7715b Merged branch wrap-data-access into default for resource-friendly data access. Updated API to promote that friendliness to clients (channels, not byte[]). More exceptions
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diff changeset
213 try {
d5268ca7715b Merged branch wrap-data-access into default for resource-friendly data access. Updated API to promote that friendliness to clients (channels, not byte[]). More exceptions
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214 Path origin = HgStatusCollector.getOriginIfCopy(repo, fname, baseRevNames, baseRevision);
d5268ca7715b Merged branch wrap-data-access into default for resource-friendly data access. Updated API to promote that friendliness to clients (channels, not byte[]). More exceptions
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diff changeset
215 if (origin != null) {
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diff changeset
216 inspector.copied(getPathPool().path(origin), getPathPool().path(fname));
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217 return;
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218 }
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219 } catch (HgDataStreamException ex) {
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220 ex.printStackTrace();
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221 // FIXME report to a mediator, continue status collection
90
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222 }
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223 } else if ((r = getDirstate().checkAdded(fname)) != null) {
58
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224 if (r.name2 != null && baseRevNames.contains(r.name2)) {
90
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225 baseRevNames.remove(r.name2); // XXX surely I shall not report rename source as Removed?
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226 inspector.copied(getPathPool().path(r.name2), getPathPool().path(fname));
58
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227 return;
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228 }
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229 // fall-through, report as added
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230 } else if (getDirstate().checkRemoved(fname) != null) {
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231 // removed: removed file was not known at the time of baseRevision, and we should not report it as removed
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232 return;
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233 }
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234 inspector.added(getPathPool().path(fname));
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235 } else {
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236 // was known; check whether clean or modified
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237 // 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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238 if ((r = getDirstate().checkNormal(fname)) != null || (r = getDirstate().checkMerged(fname)) != null || (r = getDirstate().checkAdded(fname)) != null) {
58
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239 // either clean or modified
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240 HgDataFile fileNode = repo.getFileNode(fname);
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241 final int lengthAtRevision = fileNode.length(nid1);
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242 if (r.size /* XXX File.length() ?! */ != lengthAtRevision || flags != todoGenerateFlags(fname /*java.io.File*/)) {
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243 inspector.modified(getPathPool().path(fname));
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244 } else {
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245 // check actual content to see actual changes
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246 if (areTheSame(f, fileNode, fileNode.getLocalRevision(nid1))) {
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247 inspector.clean(getPathPool().path(fname));
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248 } else {
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249 inspector.modified(getPathPool().path(fname));
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250 }
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251 }
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252 }
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253 // only those left in idsMap after processing are reported as removed
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254 }
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255
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256 // 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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257 // 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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258 // 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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259 // changeset nodeid + hash(actual content) => entry (Nodeid) in the next Manifest
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260 // 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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261 // The question is whether original Hg treats this case (same content, different parents and hence nodeids) as 'modified' or 'clean'
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262 }
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263
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264 private boolean areTheSame(File f, HgDataFile dataFile, int localRevision) {
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265 // XXX consider adding HgDataDile.compare(File/byte[]/whatever) operation to optimize comparison
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266 ByteArrayChannel bac = new ByteArrayChannel();
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267 boolean ioFailed = false;
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268 try {
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269 // need content with metadata striped off - although theoretically chances are metadata may be different,
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270 // WC doesn't have it anyway
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271 dataFile.content(localRevision, bac);
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272 } catch (CancelledException ex) {
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273 // silently ignore - can't happen, ByteArrayChannel is not cancellable
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274 } catch (IOException ex) {
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275 ioFailed = true;
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276 } catch (HgException ex) {
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277 ioFailed = true;
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278 }
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279 return !ioFailed && areTheSame(f, bac.toArray(), dataFile.getPath());
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280 }
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281
117
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282 private boolean areTheSame(File f, final byte[] data, Path p) {
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283 FileInputStream fis = null;
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284 try {
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285 try {
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286 fis = new FileInputStream(f);
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287 FileChannel fc = fis.getChannel();
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288 ByteBuffer fb = ByteBuffer.allocate(min(data.length, 8192));
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289 final boolean[] checkValue = new boolean[] { true };
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290 ByteChannel check = new ByteChannel() {
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291 int x = 0;
120
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292 final boolean debug = false; // XXX may want to add global variable to allow clients to turn
148
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support
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293 public int write(ByteBuffer buffer) {
117
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294 for (int i = buffer.remaining(); i > 0; i--, x++) {
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295 if (data[x] != buffer.get()) {
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296 if (debug) {
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297 byte[] xx = new byte[15];
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298 if (buffer.position() > 5) {
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299 buffer.position(buffer.position() - 5);
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300 }
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301 buffer.get(xx);
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302 System.out.print("expected >>" + new String(data, max(0, x - 4), 20) + "<< but got >>");
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303 System.out.println(new String(xx) + "<<");
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304 }
117
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305 checkValue[0] = false;
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306 break;
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307 }
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308 }
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309 buffer.position(buffer.limit()); // mark as read
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310 return buffer.limit();
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311 }
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312 };
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313 FilterByteChannel filters = new FilterByteChannel(check, repo.getFiltersFromWorkingDirToRepo(p));
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314 while (fc.read(fb) != -1 && checkValue[0]) {
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315 fb.flip();
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316 filters.write(fb);
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317 fb.compact();
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318 }
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319 return checkValue[0];
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320 } catch (IOException ex) {
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321 if (fis != null) {
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322 fis.close();
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323 }
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324 ex.printStackTrace(); // log warn
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325 }
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326 } catch (/*TODO typed*/Exception ex) {
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327 ex.printStackTrace();
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328 }
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329 return false;
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330 }
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331
141
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332 private static String todoGenerateFlags(Path fname) {
58
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333 // FIXME implement
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334 return null;
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335 }
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336
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337 }