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annotate src/com/tmate/hgkit/ll/WorkingCopyStatusCollector.java @ 59:b771e94a4f7c

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Introduce Internals to keep LocalHgRepo casts and alike in a single place. WCSC optionally to reuse SC data
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 18 Jan 2011 00:08:15 +0100
parents 4cfc47bc14cc
children a47530a2ea12
rev   line source
58
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1 /*
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2 * Copyright (c) 2011 Artem Tikhomirov
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3 */
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4 package com.tmate.hgkit.ll;
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5
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6 import static com.tmate.hgkit.ll.HgRepository.TIP;
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7
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8 import java.io.BufferedInputStream;
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9 import java.io.File;
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10 import java.io.FileInputStream;
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11 import java.io.IOException;
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12 import java.util.Collections;
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13 import java.util.Set;
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14 import java.util.TreeSet;
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16 import com.tmate.hgkit.fs.FileWalker;
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18 /**
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19 *
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20 * @author artem
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21 */
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22 public class WorkingCopyStatusCollector {
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24 private final HgRepository repo;
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25 private final FileWalker repoWalker;
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26 private HgDirstate dirstate;
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27 private StatusCollector baseRevisionCollector;
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29 public WorkingCopyStatusCollector(HgRepository hgRepo, FileWalker hgRepoWalker) {
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30 this.repo = hgRepo;
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31 this.repoWalker = hgRepoWalker;
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32 }
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34 /**
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35 * Optionally, supply a collector instance that may cache (or have already cached) base revision
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36 * @param sc may be null
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37 */
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38 public void setBseRevisionCollector(StatusCollector sc) {
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39 baseRevisionCollector = sc;
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40 }
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42 private HgDirstate getDirstate() {
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43 if (dirstate == null) {
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44 if (repo instanceof LocalHgRepo) {
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45 dirstate = ((LocalHgRepo) repo).loadDirstate();
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46 } else {
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47 dirstate = new HgDirstate();
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48 }
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49 }
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50 return dirstate;
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51 }
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52
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53 // may be invoked few times
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54 public void walk(int baseRevision, StatusCollector.Inspector inspector) {
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55 final HgIgnore hgIgnore = ((LocalHgRepo) repo).loadIgnore(); // FIXME hack
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56 TreeSet<String> knownEntries = getDirstate().all();
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57 final boolean isTipBase = baseRevision == TIP || baseRevision == repo.getManifest().getRevisionCount();
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58 StatusCollector.ManifestRevisionInspector collect = null;
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59 Set<String> baseRevFiles = Collections.emptySet();
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60 if (!isTipBase) {
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61 if (baseRevisionCollector != null) {
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62 collect = baseRevisionCollector.raw(baseRevision);
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63 } else {
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64 collect = new StatusCollector.ManifestRevisionInspector(baseRevision, baseRevision);
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65 repo.getManifest().walk(baseRevision, baseRevision, collect);
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66 }
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67 baseRevFiles = new TreeSet<String>(collect.files(baseRevision));
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68 }
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69 repoWalker.reset();
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70 while (repoWalker.hasNext()) {
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71 repoWalker.next();
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72 String fname = repoWalker.name();
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73 File f = repoWalker.file();
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74 if (hgIgnore.isIgnored(fname)) {
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75 inspector.ignored(fname);
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76 } else if (knownEntries.remove(fname)) {
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77 // modified, added, removed, clean
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78 if (collect != null) { // need to check against base revision, not FS file
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79 Nodeid nid1 = collect.nodeid(baseRevision, fname);
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80 String flags = collect.flags(baseRevision, fname);
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81 checkLocalStatusAgainstBaseRevision(baseRevFiles, nid1, flags, fname, f, inspector);
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82 baseRevFiles.remove(fname);
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83 } else {
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84 checkLocalStatusAgainstFile(fname, f, inspector);
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85 }
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86 } else {
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87 inspector.unknown(fname);
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88 }
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89 }
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90 if (collect != null) {
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91 for (String r : baseRevFiles) {
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92 inspector.removed(r);
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93 }
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94 }
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95 for (String m : knownEntries) {
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96 // removed from the repository and missing from working dir shall not be reported as 'deleted'
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97 if (getDirstate().checkRemoved(m) == null) {
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98 inspector.missing(m);
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99 }
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100 }
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101 }
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102
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103 public StatusCollector.Record status(int baseRevision) {
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104 StatusCollector.Record rv = new StatusCollector.Record();
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diff changeset
105 walk(baseRevision, rv);
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diff changeset
106 return rv;
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107 }
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108
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diff changeset
109 //********************************************
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110
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111
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112 private void checkLocalStatusAgainstFile(String fname, File f, StatusCollector.Inspector inspector) {
58
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diff changeset
113 HgDirstate.Record r;
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114 if ((r = getDirstate().checkNormal(fname)) != null) {
58
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115 // either clean or modified
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116 if (f.lastModified() / 1000 == r.time && r.size == f.length()) {
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117 inspector.clean(fname);
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118 } else {
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119 // FIXME check actual content to avoid false modified files
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120 inspector.modified(fname);
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121 }
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122 } else if ((r = getDirstate().checkAdded(fname)) != null) {
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123 if (r.name2 == null) {
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124 inspector.added(fname);
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125 } else {
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126 inspector.copied(fname, r.name2);
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127 }
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128 } else if ((r = getDirstate().checkRemoved(fname)) != null) {
58
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129 inspector.removed(fname);
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130 } else if ((r = getDirstate().checkMerged(fname)) != null) {
58
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131 inspector.modified(fname);
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132 }
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133 }
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134
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135 // XXX refactor checkLocalStatus methods in more OO way
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136 private void checkLocalStatusAgainstBaseRevision(Set<String> baseRevNames, Nodeid nid1, String flags, String fname, File f, StatusCollector.Inspector inspector) {
58
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137 // fname is in the dirstate, either Normal, Added, Removed or Merged
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138 HgDirstate.Record r;
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139 if (nid1 == null) {
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140 // normal: added?
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141 // added: not known at the time of baseRevision, shall report
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142 // merged: was not known, report as added?
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143 if ((r = getDirstate().checkAdded(fname)) != null) {
58
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144 if (r.name2 != null && baseRevNames.contains(r.name2)) {
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145 baseRevNames.remove(r.name2);
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146 inspector.copied(r.name2, fname);
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147 return;
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148 }
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149 // fall-through, report as added
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150 } else if (getDirstate().checkRemoved(fname) != null) {
58
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151 // removed: removed file was not known at the time of baseRevision, and we should not report it as removed
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152 return;
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153 }
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154 inspector.added(fname);
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155 } else {
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156 // was known; check whether clean or modified
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157 // 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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158 if ((r = getDirstate().checkNormal(fname)) != null || (r = getDirstate().checkMerged(fname)) != null || (r = getDirstate().checkAdded(fname)) != null) {
58
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159 // either clean or modified
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160 HgDataFile fileNode = repo.getFileNode(fname);
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161 final int lengthAtRevision = fileNode.length(nid1);
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162 if (r.size /* XXX File.length() ?! */ != lengthAtRevision || flags != todoGenerateFlags(fname /*java.io.File*/)) {
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163 inspector.modified(fname);
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164 } else {
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165 // check actual content to see actual changes
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166 // XXX consider adding HgDataDile.compare(File/byte[]/whatever) operation to optimize comparison
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167 if (areTheSame(f, fileNode.content(nid1))) {
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168 inspector.clean(fname);
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169 } else {
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170 inspector.modified(fname);
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171 }
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172 }
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173 }
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174 // only those left in idsMap after processing are reported as removed
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175 }
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176
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177 // 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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178 // 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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179 // 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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180 // changeset nodeid + hash(actual content) => entry (Nodeid) in the next Manifest
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181 // 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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182 // The question is whether original Hg treats this case (same content, different parents and hence nodeids) as 'modified' or 'clean'
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183 }
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184
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185 private static String todoGenerateFlags(String fname) {
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186 // FIXME implement
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187 return null;
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188 }
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189 private static boolean areTheSame(File f, byte[] data) {
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190 try {
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191 BufferedInputStream is = new BufferedInputStream(new FileInputStream(f));
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192 int i = 0;
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193 while (i < data.length && data[i] == is.read()) {
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194 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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195 }
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196 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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197 } catch (IOException ex) {
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198 ex.printStackTrace(); // log warn
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199 }
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200 return false;
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201 }
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202
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203 }