Mercurial > hg4j

annotate src/com/tmate/hgkit/ll/WorkingCopyStatusCollector.java @ 69:5a69397f0f99

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Discovery utility for Hg network protocol finally in the repo, with quick-n-dirty ConfigFile impl that helps to hide auth info
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 22 Jan 2011 22:53:57 +0100
parents 0e499fed9b3d
children
rev   line source
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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.BAD_REVISION;
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7 import static com.tmate.hgkit.ll.HgRepository.TIP;
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8
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9 import java.io.BufferedInputStream;
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10 import java.io.File;
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11 import java.io.FileInputStream;
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12 import java.io.IOException;
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13 import java.util.Collections;
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14 import java.util.Set;
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15 import java.util.TreeSet;
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17 import com.tmate.hgkit.fs.FileWalker;
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19 /**
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20 *
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21 * @author artem
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22 */
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23 public class WorkingCopyStatusCollector {
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25 private final HgRepository repo;
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26 private final FileWalker repoWalker;
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27 private HgDirstate dirstate;
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28 private StatusCollector baseRevisionCollector;
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30 public WorkingCopyStatusCollector(HgRepository hgRepo, FileWalker hgRepoWalker) {
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31 this.repo = hgRepo;
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32 this.repoWalker = hgRepoWalker;
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33 }
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35 /**
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36 * Optionally, supply a collector instance that may cache (or have already cached) base revision
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37 * @param sc may be null
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38 */
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39 public void setBaseRevisionCollector(StatusCollector sc) {
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40 baseRevisionCollector = sc;
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41 }
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43 private HgDirstate getDirstate() {
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44 if (dirstate == null) {
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45 if (repo instanceof LocalHgRepo) {
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46 dirstate = ((LocalHgRepo) repo).loadDirstate();
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47 } else {
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48 dirstate = new HgDirstate();
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49 }
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50 }
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51 return dirstate;
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52 }
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53
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54 // may be invoked few times
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55 public void walk(int baseRevision, StatusCollector.Inspector inspector) {
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56 final HgIgnore hgIgnore = ((LocalHgRepo) repo).loadIgnore(); // FIXME hack
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57 TreeSet<String> knownEntries = getDirstate().all();
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58 final boolean isTipBase;
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59 if (baseRevision == TIP) {
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60 baseRevision = repo.getManifest().getRevisionCount() - 1;
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61 isTipBase = true;
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62 } else {
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63 isTipBase = baseRevision == repo.getManifest().getRevisionCount() - 1;
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64 }
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65 StatusCollector.ManifestRevisionInspector collect = null;
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66 Set<String> baseRevFiles = Collections.emptySet();
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67 if (!isTipBase) {
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68 if (baseRevisionCollector != null) {
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69 collect = baseRevisionCollector.raw(baseRevision);
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70 } else {
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71 collect = new StatusCollector.ManifestRevisionInspector(baseRevision, baseRevision);
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72 repo.getManifest().walk(baseRevision, baseRevision, collect);
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73 }
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74 baseRevFiles = new TreeSet<String>(collect.files(baseRevision));
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75 }
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76 if (inspector instanceof StatusCollector.Record) {
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77 StatusCollector sc = baseRevisionCollector == null ? new StatusCollector(repo) : baseRevisionCollector;
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78 ((StatusCollector.Record) inspector).init(baseRevision, BAD_REVISION, sc);
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79 }
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80 repoWalker.reset();
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81 while (repoWalker.hasNext()) {
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82 repoWalker.next();
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83 String fname = repoWalker.name();
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84 File f = repoWalker.file();
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85 if (hgIgnore.isIgnored(fname)) {
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86 inspector.ignored(fname);
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87 } else if (knownEntries.remove(fname)) {
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88 // modified, added, removed, clean
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89 if (collect != null) { // need to check against base revision, not FS file
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90 Nodeid nid1 = collect.nodeid(baseRevision, fname);
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91 String flags = collect.flags(baseRevision, fname);
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92 checkLocalStatusAgainstBaseRevision(baseRevFiles, nid1, flags, fname, f, inspector);
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93 baseRevFiles.remove(fname);
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94 } else {
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95 checkLocalStatusAgainstFile(fname, f, inspector);
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96 }
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97 } else {
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98 inspector.unknown(fname);
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99 }
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100 }
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101 if (collect != null) {
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102 for (String r : baseRevFiles) {
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103 inspector.removed(r);
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104 }
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105 }
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diff changeset
106 for (String m : knownEntries) {
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107 // removed from the repository and missing from working dir shall not be reported as 'deleted'
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108 if (getDirstate().checkRemoved(m) == null) {
58
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diff changeset
109 inspector.missing(m);
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110 }
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111 }
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112 }
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113
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114 public StatusCollector.Record status(int baseRevision) {
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115 StatusCollector.Record rv = new StatusCollector.Record();
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116 walk(baseRevision, rv);
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117 return rv;
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118 }
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119
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120 //********************************************
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121
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122
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123 private void checkLocalStatusAgainstFile(String fname, File f, StatusCollector.Inspector inspector) {
58
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124 HgDirstate.Record r;
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125 if ((r = getDirstate().checkNormal(fname)) != null) {
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126 // either clean or modified
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127 if (f.lastModified() / 1000 == r.time && r.size == f.length()) {
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128 inspector.clean(fname);
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129 } else {
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130 // FIXME check actual content to avoid false modified files
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131 inspector.modified(fname);
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132 }
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133 } else if ((r = getDirstate().checkAdded(fname)) != null) {
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134 if (r.name2 == null) {
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135 inspector.added(fname);
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136 } else {
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137 inspector.copied(fname, r.name2);
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138 }
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139 } else if ((r = getDirstate().checkRemoved(fname)) != null) {
58
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140 inspector.removed(fname);
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141 } else if ((r = getDirstate().checkMerged(fname)) != null) {
58
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142 inspector.modified(fname);
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143 }
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144 }
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145
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146 // XXX refactor checkLocalStatus methods in more OO way
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147 private void checkLocalStatusAgainstBaseRevision(Set<String> baseRevNames, Nodeid nid1, String flags, String fname, File f, StatusCollector.Inspector inspector) {
58
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148 // fname is in the dirstate, either Normal, Added, Removed or Merged
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149 HgDirstate.Record r;
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150 if (nid1 == null) {
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151 // normal: added?
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152 // added: not known at the time of baseRevision, shall report
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153 // merged: was not known, report as added?
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154 if ((r = getDirstate().checkAdded(fname)) != null) {
58
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155 if (r.name2 != null && baseRevNames.contains(r.name2)) {
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156 baseRevNames.remove(r.name2);
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157 inspector.copied(r.name2, fname);
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158 return;
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159 }
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160 // fall-through, report as added
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161 } else if (getDirstate().checkRemoved(fname) != null) {
58
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162 // 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
163 return;
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164 }
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165 inspector.added(fname);
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166 } else {
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167 // was known; check whether clean or modified
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168 // 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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169 if ((r = getDirstate().checkNormal(fname)) != null || (r = getDirstate().checkMerged(fname)) != null || (r = getDirstate().checkAdded(fname)) != null) {
58
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170 // either clean or modified
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171 HgDataFile fileNode = repo.getFileNode(fname);
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172 final int lengthAtRevision = fileNode.length(nid1);
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173 if (r.size /* XXX File.length() ?! */ != lengthAtRevision || flags != todoGenerateFlags(fname /*java.io.File*/)) {
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diff changeset
174 inspector.modified(fname);
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175 } else {
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176 // check actual content to see actual changes
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177 // XXX consider adding HgDataDile.compare(File/byte[]/whatever) operation to optimize comparison
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178 if (areTheSame(f, fileNode.content(nid1))) {
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179 inspector.clean(fname);
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180 } else {
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181 inspector.modified(fname);
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182 }
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183 }
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184 }
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185 // only those left in idsMap after processing are reported as removed
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186 }
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187
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188 // 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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189 // 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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190 // 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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diff changeset
191 // changeset nodeid + hash(actual content) => entry (Nodeid) in the next Manifest
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192 // 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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193 // The question is whether original Hg treats this case (same content, different parents and hence nodeids) as 'modified' or 'clean'
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194 }
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195
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196 private static String todoGenerateFlags(String fname) {
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197 // FIXME implement
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198 return null;
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199 }
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200 private static boolean areTheSame(File f, byte[] data) {
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diff changeset
201 try {
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202 BufferedInputStream is = new BufferedInputStream(new FileInputStream(f));
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diff changeset
203 int i = 0;
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diff changeset
204 while (i < data.length && data[i] == is.read()) {
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diff changeset
205 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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206 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
207 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.
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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208 } catch (IOException ex) {
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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209 ex.printStackTrace(); // log warn
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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210 }
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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211 return false;
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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212 }
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
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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214 }