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annotate src/org/tmatesoft/hg/repo/WorkingCopyStatusCollector.java @ 83:a5275143664c

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Complete path hash calculation of fncache requirement
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 25 Jan 2011 22:44:14 +0100
parents 658fa6b3a371
children 42bcb4bffd17
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@svnkit.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 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.util.FileWalker;
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33 /**
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34 *
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35 * @author Artem Tikhomirov
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36 * @author TMate Software Ltd.
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37 */
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38 public class WorkingCopyStatusCollector {
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40 private final HgRepository repo;
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41 private final FileWalker repoWalker;
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42 private HgDirstate dirstate;
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43 private StatusCollector baseRevisionCollector;
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44
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45 public WorkingCopyStatusCollector(HgRepository hgRepo) {
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46 this(hgRepo, hgRepo.createWorkingDirWalker());
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47 }
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49 WorkingCopyStatusCollector(HgRepository hgRepo, FileWalker hgRepoWalker) {
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50 this.repo = hgRepo;
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51 this.repoWalker = hgRepoWalker;
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52 }
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54 /**
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55 * Optionally, supply a collector instance that may cache (or have already cached) base revision
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56 * @param sc may be null
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57 */
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58 public void setBaseRevisionCollector(StatusCollector sc) {
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59 baseRevisionCollector = sc;
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60 }
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62 private HgDirstate getDirstate() {
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63 if (dirstate == null) {
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64 dirstate = repo.loadDirstate();
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65 }
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66 return dirstate;
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67 }
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68
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69 // may be invoked few times
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70 public void walk(int baseRevision, StatusCollector.Inspector inspector) {
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71 final HgIgnore hgIgnore = repo.loadIgnore();
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72 TreeSet<String> knownEntries = getDirstate().all();
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73 final boolean isTipBase;
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74 if (baseRevision == TIP) {
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75 baseRevision = repo.getManifest().getRevisionCount() - 1;
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76 isTipBase = true;
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77 } else {
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78 isTipBase = baseRevision == repo.getManifest().getRevisionCount() - 1;
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79 }
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80 StatusCollector.ManifestRevisionInspector collect = null;
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81 Set<String> baseRevFiles = Collections.emptySet();
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82 if (!isTipBase) {
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83 if (baseRevisionCollector != null) {
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84 collect = baseRevisionCollector.raw(baseRevision);
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85 } else {
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86 collect = new StatusCollector.ManifestRevisionInspector(baseRevision, baseRevision);
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87 repo.getManifest().walk(baseRevision, baseRevision, collect);
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88 }
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89 baseRevFiles = new TreeSet<String>(collect.files(baseRevision));
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90 }
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91 if (inspector instanceof StatusCollector.Record) {
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92 StatusCollector sc = baseRevisionCollector == null ? new StatusCollector(repo) : baseRevisionCollector;
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93 ((StatusCollector.Record) inspector).init(baseRevision, BAD_REVISION, sc);
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94 }
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95 repoWalker.reset();
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96 while (repoWalker.hasNext()) {
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97 repoWalker.next();
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98 String fname = repoWalker.name();
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99 File f = repoWalker.file();
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100 if (hgIgnore.isIgnored(fname)) {
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101 inspector.ignored(fname);
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102 } else if (knownEntries.remove(fname)) {
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103 // modified, added, removed, clean
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104 if (collect != null) { // need to check against base revision, not FS file
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105 Nodeid nid1 = collect.nodeid(baseRevision, fname);
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106 String flags = collect.flags(baseRevision, fname);
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107 checkLocalStatusAgainstBaseRevision(baseRevFiles, nid1, flags, fname, f, inspector);
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108 baseRevFiles.remove(fname);
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109 } else {
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110 checkLocalStatusAgainstFile(fname, f, inspector);
58
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111 }
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diff changeset
112 } else {
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diff changeset
113 inspector.unknown(fname);
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114 }
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115 }
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116 if (collect != null) {
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117 for (String r : baseRevFiles) {
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118 inspector.removed(r);
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119 }
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120 }
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121 for (String m : knownEntries) {
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122 // missing known file from a working dir
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123 if (getDirstate().checkRemoved(m) == null) {
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diff changeset
124 // not removed from the repository = 'deleted'
58
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diff changeset
125 inspector.missing(m);
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126 } else {
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127 // removed from the repo
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128 // if we check against non-tip revision, do not report files that were added past that revision and now removed.
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129 if (collect == null || baseRevFiles.contains(m)) {
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130 inspector.removed(m);
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131 }
58
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132 }
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133 }
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134 }
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135
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136 public StatusCollector.Record status(int baseRevision) {
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137 StatusCollector.Record rv = new StatusCollector.Record();
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138 walk(baseRevision, rv);
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139 return rv;
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140 }
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141
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142 //********************************************
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143
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144
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diff changeset
145 private void checkLocalStatusAgainstFile(String fname, File f, StatusCollector.Inspector inspector) {
58
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146 HgDirstate.Record r;
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147 if ((r = getDirstate().checkNormal(fname)) != null) {
58
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148 // either clean or modified
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149 if (f.lastModified() / 1000 == r.time && r.size == f.length()) {
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150 inspector.clean(fname);
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151 } else {
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diff changeset
152 // FIXME check actual content to avoid false modified files
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153 inspector.modified(fname);
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154 }
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155 } else if ((r = getDirstate().checkAdded(fname)) != null) {
58
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diff changeset
156 if (r.name2 == null) {
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diff changeset
157 inspector.added(fname);
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158 } else {
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diff changeset
159 inspector.copied(r.name2, fname);
58
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160 }
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161 } else if ((r = getDirstate().checkRemoved(fname)) != null) {
58
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diff changeset
162 inspector.removed(fname);
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163 } else if ((r = getDirstate().checkMerged(fname)) != null) {
58
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diff changeset
164 inspector.modified(fname);
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165 }
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166 }
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167
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168 // XXX refactor checkLocalStatus methods in more OO way
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169 private void checkLocalStatusAgainstBaseRevision(Set<String> baseRevNames, Nodeid nid1, String flags, String fname, File f, StatusCollector.Inspector inspector) {
58
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170 // fname is in the dirstate, either Normal, Added, Removed or Merged
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171 HgDirstate.Record r;
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172 if (nid1 == null) {
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diff changeset
173 // normal: added?
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174 // added: not known at the time of baseRevision, shall report
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175 // merged: was not known, report as added?
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176 if ((r = getDirstate().checkAdded(fname)) != null) {
58
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177 if (r.name2 != null && baseRevNames.contains(r.name2)) {
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diff changeset
178 baseRevNames.remove(r.name2);
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179 inspector.copied(r.name2, fname);
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180 return;
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181 }
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182 // fall-through, report as added
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183 } else if (getDirstate().checkRemoved(fname) != null) {
58
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diff changeset
184 // removed: removed file was not known at the time of baseRevision, and we should not report it as removed
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diff changeset
185 return;
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186 }
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187 inspector.added(fname);
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188 } else {
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189 // was known; check whether clean or modified
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190 // 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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191 if ((r = getDirstate().checkNormal(fname)) != null || (r = getDirstate().checkMerged(fname)) != null || (r = getDirstate().checkAdded(fname)) != null) {
58
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diff changeset
192 // either clean or modified
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diff changeset
193 HgDataFile fileNode = repo.getFileNode(fname);
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194 final int lengthAtRevision = fileNode.length(nid1);
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195 if (r.size /* XXX File.length() ?! */ != lengthAtRevision || flags != todoGenerateFlags(fname /*java.io.File*/)) {
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diff changeset
196 inspector.modified(fname);
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diff changeset
197 } else {
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diff changeset
198 // check actual content to see actual changes
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diff changeset
199 // XXX consider adding HgDataDile.compare(File/byte[]/whatever) operation to optimize comparison
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diff changeset
200 if (areTheSame(f, fileNode.content(nid1))) {
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diff changeset
201 inspector.clean(fname);
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diff changeset
202 } else {
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diff changeset
203 inspector.modified(fname);
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204 }
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205 }
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206 }
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diff changeset
207 // only those left in idsMap after processing are reported as removed
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208 }
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diff changeset
209
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diff changeset
210 // 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
4cfc47bc14cc Status against local working dir extracted into distinct class. Iterating over local files extracted for ease of os-dependant patching
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diff changeset
211 // 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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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
212 // 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:
4cfc47bc14cc Status against local working dir extracted into distinct class. Iterating over local files extracted for ease of os-dependant patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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213 // changeset nodeid + hash(actual content) => entry (Nodeid) in the next Manifest
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214 // 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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215 // The question is whether original Hg treats this case (same content, different parents and hence nodeids) as 'modified' or 'clean'
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216 }
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217
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218 private static String todoGenerateFlags(String fname) {
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219 // FIXME implement
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220 return null;
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221 }
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222 private static boolean areTheSame(File f, byte[] data) {
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223 try {
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224 BufferedInputStream is = new BufferedInputStream(new FileInputStream(f));
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225 int i = 0;
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226 while (i < data.length && data[i] == is.read()) {
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227 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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228 }
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229 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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230 } catch (IOException ex) {
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231 ex.printStackTrace(); // log warn
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232 }
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233 return false;
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234 }
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235
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236 }