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annotate src/org/tmatesoft/hg/repo/WorkingCopyStatusCollector.java @ 74:6f1b88693d48

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Complete refactoring to org.tmatesoft
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 24 Jan 2011 03:14:45 +0100
parents src/com/tmate/hgkit/ll/WorkingCopyStatusCollector.java@0e499fed9b3d
children 658fa6b3a371
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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48
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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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diff changeset
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 inspector.removed(m);
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129 }
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130 }
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131 }
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132
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133 public StatusCollector.Record status(int baseRevision) {
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134 StatusCollector.Record rv = new StatusCollector.Record();
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135 walk(baseRevision, rv);
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136 return rv;
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137 }
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138
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139 //********************************************
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140
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141
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diff changeset
142 private void checkLocalStatusAgainstFile(String fname, File f, StatusCollector.Inspector inspector) {
58
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143 HgDirstate.Record r;
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144 if ((r = getDirstate().checkNormal(fname)) != null) {
58
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145 // either clean or modified
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146 if (f.lastModified() / 1000 == r.time && r.size == f.length()) {
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147 inspector.clean(fname);
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148 } else {
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diff changeset
149 // FIXME check actual content to avoid false modified files
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150 inspector.modified(fname);
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151 }
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152 } else if ((r = getDirstate().checkAdded(fname)) != null) {
58
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diff changeset
153 if (r.name2 == null) {
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154 inspector.added(fname);
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155 } else {
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diff changeset
156 inspector.copied(r.name2, fname);
58
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157 }
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158 } else if ((r = getDirstate().checkRemoved(fname)) != null) {
58
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diff changeset
159 inspector.removed(fname);
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160 } else if ((r = getDirstate().checkMerged(fname)) != null) {
58
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diff changeset
161 inspector.modified(fname);
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162 }
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163 }
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164
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165 // XXX refactor checkLocalStatus methods in more OO way
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166 private void checkLocalStatusAgainstBaseRevision(Set<String> baseRevNames, Nodeid nid1, String flags, String fname, File f, StatusCollector.Inspector inspector) {
58
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167 // fname is in the dirstate, either Normal, Added, Removed or Merged
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diff changeset
168 HgDirstate.Record r;
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169 if (nid1 == null) {
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170 // normal: added?
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diff changeset
171 // added: not known at the time of baseRevision, shall report
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172 // merged: was not known, report as added?
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173 if ((r = getDirstate().checkAdded(fname)) != null) {
58
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174 if (r.name2 != null && baseRevNames.contains(r.name2)) {
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diff changeset
175 baseRevNames.remove(r.name2);
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176 inspector.copied(r.name2, fname);
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177 return;
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178 }
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179 // fall-through, report as added
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180 } else if (getDirstate().checkRemoved(fname) != null) {
58
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181 // 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
182 return;
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183 }
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diff changeset
184 inspector.added(fname);
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185 } else {
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diff changeset
186 // was known; check whether clean or modified
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diff changeset
187 // 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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188 if ((r = getDirstate().checkNormal(fname)) != null || (r = getDirstate().checkMerged(fname)) != null || (r = getDirstate().checkAdded(fname)) != null) {
58
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189 // either clean or modified
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diff changeset
190 HgDataFile fileNode = repo.getFileNode(fname);
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diff changeset
191 final int lengthAtRevision = fileNode.length(nid1);
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diff changeset
192 if (r.size /* XXX File.length() ?! */ != lengthAtRevision || flags != todoGenerateFlags(fname /*java.io.File*/)) {
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diff changeset
193 inspector.modified(fname);
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diff changeset
194 } else {
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diff changeset
195 // check actual content to see actual changes
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diff changeset
196 // XXX consider adding HgDataDile.compare(File/byte[]/whatever) operation to optimize comparison
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diff changeset
197 if (areTheSame(f, fileNode.content(nid1))) {
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diff changeset
198 inspector.clean(fname);
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diff changeset
199 } else {
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diff changeset
200 inspector.modified(fname);
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201 }
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202 }
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diff changeset
203 }
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204 // only those left in idsMap after processing are reported as removed
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205 }
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diff changeset
206
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diff changeset
207 // 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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208 // 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
209 // 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
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diff changeset
210 // changeset nodeid + hash(actual content) => entry (Nodeid) in the next Manifest
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parents:
diff changeset
211 // 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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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
212 // The question is whether original Hg treats this case (same content, different parents and hence nodeids) as 'modified' or 'clean'
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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213 }
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214
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215 private static String todoGenerateFlags(String fname) {
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216 // FIXME implement
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217 return null;
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218 }
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219 private static boolean areTheSame(File f, byte[] data) {
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220 try {
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221 BufferedInputStream is = new BufferedInputStream(new FileInputStream(f));
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222 int i = 0;
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223 while (i < data.length && data[i] == is.read()) {
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224 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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225 }
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226 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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227 } catch (IOException ex) {
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228 ex.printStackTrace(); // log warn
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229 }
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230 return false;
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231 }
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232
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233 }