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annotate src/com/tmate/hgkit/ll/LocalHgRepo.java @ 55:05829a70b30b

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Status operation extracted into separate, cache-friendly class
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 17 Jan 2011 04:45:09 +0100
parents f1db8610da62
children 8b0d6f1bd6b4
rev   line source
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1 /*
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2 * Copyright (c) 2010, 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 java.io.BufferedInputStream;
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7 import java.io.BufferedReader;
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8 import java.io.File;
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9 import java.io.FileInputStream;
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10 import java.io.IOException;
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11 import java.io.InputStreamReader;
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12 import java.lang.ref.SoftReference;
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13 import java.util.Arrays;
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14 import java.util.HashMap;
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15 import java.util.LinkedList;
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16 import java.util.TreeSet;
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18 import com.tmate.hgkit.fs.DataAccessProvider;
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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 LocalHgRepo extends HgRepository {
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25 private File repoDir; // .hg folder
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26 private final String repoLocation;
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27 private final DataAccessProvider dataAccess;
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29 public LocalHgRepo(String repositoryPath) {
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30 setInvalid(true);
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31 repoLocation = repositoryPath;
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32 dataAccess = null;
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33 }
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34
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35 public LocalHgRepo(File repositoryRoot) throws IOException {
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36 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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37 setInvalid(false);
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38 repoDir = repositoryRoot;
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39 repoLocation = repositoryRoot.getParentFile().getCanonicalPath();
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40 dataAccess = new DataAccessProvider();
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41 parseRequires();
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42 }
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43
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44 @Override
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45 public String getLocation() {
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46 return repoLocation;
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47 }
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49 // public void statusLocal(int baseRevision, StatusCollector.Inspector inspector) {
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50 // LinkedList<File> folders = new LinkedList<File>();
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51 // final File rootDir = repoDir.getParentFile();
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52 // folders.add(rootDir);
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53 // final HgDirstate dirstate = loadDirstate();
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54 // final HgIgnore hgignore = loadIgnore();
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55 // TreeSet<String> knownEntries = dirstate.all();
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56 // final boolean isTipBase = baseRevision == TIP || baseRevision == getManifest().getRevisionCount();
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57 // final StatusCollector.ManifestRevisionInspector collect = isTipBase ? null : new StatusCollector.ManifestRevisionInspector();
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58 // if (!isTipBase) {
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59 // getManifest().walk(baseRevision, baseRevision, collect);
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60 // }
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61 // do {
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62 // File d = folders.removeFirst();
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63 // for (File f : d.listFiles()) {
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64 // if (f.isDirectory()) {
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65 // if (!".hg".equals(f.getName())) {
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66 // folders.addLast(f);
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67 // }
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68 // } else {
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69 // // FIXME path relative to rootDir - need more robust approach
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70 // String fname = normalize(f.getPath().substring(rootDir.getPath().length() + 1));
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71 // if (hgignore.isIgnored(fname)) {
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72 // inspector.ignored(fname);
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73 // } else {
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74 // if (knownEntries.remove(fname)) {
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75 // // modified, added, removed, clean
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76 // if (collect != null) { // need to check against base revision, not FS file
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77 // checkLocalStatusAgainstBaseRevision(collect, fname, f, dirstate, inspector);
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78 // } else {
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79 // checkLocalStatusAgainstFile(fname, f, dirstate, inspector);
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80 // }
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81 // } else {
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82 // inspector.unknown(fname);
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83 // }
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84 // }
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85 // }
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86 // }
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87 // } while (!folders.isEmpty());
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88 // if (collect != null) {
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89 // for (String r : collect.idsMap.keySet()) {
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90 // inspector.removed(r);
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91 // }
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92 // }
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93 // for (String m : knownEntries) {
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94 // // removed from the repository and missing from working dir shall not be reported as 'deleted'
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95 // if (dirstate.checkRemoved(m) == null) {
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96 // inspector.missing(m);
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97 // }
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98 // }
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99 // }
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100 //
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101 // private static void checkLocalStatusAgainstFile(String fname, File f, HgDirstate dirstate, StatusCollector.Inspector inspector) {
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102 // HgDirstate.Record r;
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103 // if ((r = dirstate.checkNormal(fname)) != null) {
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104 // // either clean or modified
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105 // if (f.lastModified() / 1000 == r.time && r.size == f.length()) {
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106 // inspector.clean(fname);
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107 // } else {
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108 // // FIXME check actual content to avoid false modified files
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109 // inspector.modified(fname);
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110 // }
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111 // } else if ((r = dirstate.checkAdded(fname)) != null) {
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112 // if (r.name2 == null) {
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113 // inspector.added(fname);
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114 // } else {
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115 // inspector.copied(fname, r.name2);
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116 // }
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117 // } else if ((r = dirstate.checkRemoved(fname)) != null) {
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118 // inspector.removed(fname);
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119 // } else if ((r = dirstate.checkMerged(fname)) != null) {
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120 // inspector.modified(fname);
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121 // }
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122 // }
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123 //
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124 // // XXX refactor checkLocalStatus methods in more OO way
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125 // private void checkLocalStatusAgainstBaseRevision(StatusCollector.ManifestRevisionInspector collect, String fname, File f, HgDirstate dirstate, StatusCollector.Inspector inspector) {
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126 // // fname is in the dirstate, either Normal, Added, Removed or Merged
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127 // Nodeid nid1 = collect.idsMap.remove(fname);
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128 // String flags = collect.flagsMap.remove(fname);
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129 // HgDirstate.Record r;
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130 // if (nid1 == null) {
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131 // // normal: added?
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132 // // added: not known at the time of baseRevision, shall report
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133 // // merged: was not known, report as added?
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134 // if ((r = dirstate.checkAdded(fname)) != null) {
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135 // if (r.name2 != null && collect.idsMap.containsKey(r.name2)) {
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136 // collect.idsMap.remove(r.name2);
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137 // collect.idsMap.remove(r.name2);
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138 // inspector.copied(r.name2, fname);
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139 // return;
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140 // }
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141 // // fall-through, report as added
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142 // } else if (dirstate.checkRemoved(fname) != null) {
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143 // // removed: removed file was not known at the time of baseRevision, and we should not report it as removed
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144 // return;
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145 // }
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146 // inspector.added(fname);
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147 // } else {
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148 // // was known; check whether clean or modified
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149 // // 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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150 // if ((r = dirstate.checkNormal(fname)) != null || (r = dirstate.checkMerged(fname)) != null || (r = dirstate.checkAdded(fname)) != null) {
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151 // // either clean or modified
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152 // HgDataFile fileNode = getFileNode(fname);
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153 // final int lengthAtRevision = fileNode.length(nid1);
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154 // if (r.size /* XXX File.length() ?! */ != lengthAtRevision || flags != todoGenerateFlags(fname /*java.io.File*/)) {
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155 // inspector.modified(fname);
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156 // } else {
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157 // // check actual content to see actual changes
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158 // // XXX consider adding HgDataDile.compare(File/byte[]/whatever) operation to optimize comparison
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159 // if (areTheSame(f, fileNode.content(nid1))) {
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160 // inspector.clean(fname);
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161 // } else {
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162 // inspector.modified(fname);
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163 // }
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164 // }
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165 // }
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166 // // only those left in idsMap after processing are reported as removed
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167 // }
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168 //
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169 // // 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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170 // // 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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171 // // 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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172 // // changeset nodeid + hash(actual content) => entry (Nodeid) in the next Manifest
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173 // // 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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174 // // The question is whether original Hg treats this case (same content, different parents and hence nodeids) as 'modified' or 'clean'
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175 // }
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176
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177 private static String todoGenerateFlags(String fname) {
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178 // FIXME implement
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179 return null;
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180 }
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181 private static boolean areTheSame(File f, byte[] data) {
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182 try {
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183 BufferedInputStream is = new BufferedInputStream(new FileInputStream(f));
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184 int i = 0;
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185 while (i < data.length && data[i] == is.read()) {
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186 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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187 }
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188 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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189 } catch (IOException ex) {
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190 ex.printStackTrace(); // log warn
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191 }
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192 return false;
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193 }
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194
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195 // XXX package-local, unless there are cases when required from outside (guess, working dir/revision walkers may hide dirstate access and no public visibility needed)
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196 public final HgDirstate loadDirstate() {
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197 // XXX may cache in SoftReference if creation is expensive
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198 return new HgDirstate(this, new File(repoDir, "dirstate"));
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199 }
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200
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201 // package-local, see comment for loadDirstate
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202 public final HgIgnore loadIgnore() {
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203 return new HgIgnore(this);
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204 }
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205
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206 /*package-local*/ DataAccessProvider getDataAccess() {
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207 return dataAccess;
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208 }
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209
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210 /*package-local*/ File getRepositoryRoot() {
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211 return repoDir;
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212 }
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213
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214 @Override
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215 protected HgTags createTags() {
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216 return new HgTags();
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217 }
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218
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219 private final HashMap<String, SoftReference<RevlogStream>> streamsCache = new HashMap<String, SoftReference<RevlogStream>>();
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220
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221 /**
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222 * path - repository storage path (i.e. one usually with .i or .d)
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223 */
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224 @Override
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225 protected RevlogStream resolve(String path) {
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226 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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227 RevlogStream cached = ref == null ? null : ref.get();
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228 if (cached != null) {
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229 return cached;
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230 }
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231 File f = new File(repoDir, path);
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232 if (f.exists()) {
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233 RevlogStream s = new RevlogStream(dataAccess, f);
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234 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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235 return s;
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236 }
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237 return null;
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238 }
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239
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240 @Override
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241 public HgDataFile getFileNode(String path) {
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242 String nPath = normalize(path);
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243 String storagePath = toStoragePath(nPath, true);
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244 RevlogStream content = resolve(storagePath);
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245 // XXX no content when no file? or HgDataFile.exists() to detect that? How about files that were removed in previous releases?
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246 return new HgDataFile(this, nPath, content);
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247 }
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248
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249 private boolean revlogv1;
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250 private boolean store;
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251 private boolean fncache;
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252 private boolean dotencode;
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253
8
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254
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255 private void parseRequires() {
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256 File requiresFile = new File(repoDir, "requires");
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257 if (!requiresFile.exists()) {
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258 return;
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259 }
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260 try {
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261 BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(requiresFile)));
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262 String line;
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263 while ((line = br.readLine()) != null) {
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264 revlogv1 |= "revlogv1".equals(line);
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265 store |= "store".equals(line);
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266 fncache |= "fncache".equals(line);
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267 dotencode |= "dotencode".equals(line);
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268 }
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269 } catch (IOException ex) {
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270 ex.printStackTrace(); // FIXME log
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271 }
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272 }
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273
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274 // FIXME document what path argument is, whether it includes .i or .d, and whether it's 'normalized' (slashes) or not.
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275 // since .hg/store keeps both .i files and files without extension (e.g. fncache), guees, for data == false
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276 // we shall assume path has extension
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277 // FIXME much more to be done, see store.py:_hybridencode
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278 // @see http://mercurial.selenic.com/wiki/CaseFoldingPlan
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279 @Override
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280 protected String toStoragePath(String path, boolean data) {
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281 path = normalize(path);
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282 final String STR_STORE = "store/";
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283 final String STR_DATA = "data/";
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284 final String STR_DH = "dh/";
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285 if (!data) {
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286 return this.store ? STR_STORE + path : path;
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287 }
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288 path = path.replace(".hg/", ".hg.hg/").replace(".i/", ".i.hg/").replace(".d/", ".d.hg/");
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289 StringBuilder sb = new StringBuilder(path.length() << 1);
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290 if (store || fncache) {
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291 // encodefilename
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292 final String reservedChars = "\\:*?\"<>|";
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293 // in fact, \\ is unlikely to match, ever - we've replaced all of them already, above. Just regards to store.py
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294 int x;
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295 char[] hexByte = new char[2];
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296 for (int i = 0; i < path.length(); i++) {
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297 final char ch = path.charAt(i);
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298 if (ch >= 'a' && ch <= 'z') {
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299 sb.append(ch); // POIRAE
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300 } else if (ch >= 'A' && ch <= 'Z') {
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301 sb.append('_');
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302 sb.append(Character.toLowerCase(ch)); // Perhaps, (char) (((int) ch) + 32)? Even better, |= 0x20?
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303 } else if ( (x = reservedChars.indexOf(ch)) != -1) {
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304 sb.append('~');
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305 sb.append(toHexByte(reservedChars.charAt(x), hexByte));
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306 } else if ((ch >= '~' /*126*/ && ch <= 255) || ch < ' ' /*32*/) {
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307 sb.append('~');
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308 sb.append(toHexByte(ch, hexByte));
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309 } else if (ch == '_') {
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310 // note, encoding from store.py:_buildencodefun and :_build_lower_encodefun
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311 // differ in the way they process '_' (latter doesn't escape it)
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312 sb.append('_');
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313 sb.append('_');
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314 } else {
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315 sb.append(ch);
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316 }
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317 }
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318 // auxencode
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319 if (fncache) {
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320 x = 0; // last segment start
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321 final TreeSet<String> windowsReservedFilenames = new TreeSet<String>();
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322 windowsReservedFilenames.addAll(Arrays.asList("con prn aux nul com1 com2 com3 com4 com5 com6 com7 com8 com9 lpt1 lpt2 lpt3 lpt4 lpt5 lpt6 lpt7 lpt8 lpt9".split(" ")));
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323 do {
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324 int i = sb.indexOf("/", x);
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325 if (i == -1) {
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326 i = sb.length();
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327 }
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328 // windows reserved filenames are at least of length 3
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329 if (i - x >= 3) {
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330 boolean found = false;
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331 if (i-x == 3) {
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332 found = windowsReservedFilenames.contains(sb.subSequence(x, i));
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333 } else if (sb.charAt(x+3) == '.') { // implicit i-x > 3
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334 found = windowsReservedFilenames.contains(sb.subSequence(x, x+3));
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335 } else if (i-x > 4 && sb.charAt(x+4) == '.') {
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336 found = windowsReservedFilenames.contains(sb.subSequence(x, x+4));
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337 }
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338 if (found) {
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339 sb.setCharAt(x, '~');
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340 sb.insert(x+1, toHexByte(sb.charAt(x+2), hexByte));
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341 i += 2;
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342 }
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343 }
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344 if (dotencode && (sb.charAt(x) == '.' || sb.charAt(x) == ' ')) {
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345 sb.insert(x+1, toHexByte(sb.charAt(x), hexByte));
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346 sb.setCharAt(x, '~'); // setChar *after* charAt/insert to get ~2e, not ~7e for '.'
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347 i += 2;
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348 }
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349 x = i+1;
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350 } while (x < sb.length());
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351 }
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352 }
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353 final int MAX_PATH_LEN_IN_HGSTORE = 120;
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354 if (fncache && (sb.length() + STR_DATA.length() > MAX_PATH_LEN_IN_HGSTORE)) {
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355 throw HgRepository.notImplemented(); // FIXME digest and fncache use
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356 }
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357 if (this.store) {
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358 sb.insert(0, STR_STORE + STR_DATA);
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359 }
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360 sb.append(".i");
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361 return sb.toString();
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362 }
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363
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364 private static char[] toHexByte(int ch, char[] buf) {
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365 assert buf.length > 1;
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366 final String hexDigits = "0123456789abcdef";
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367 buf[0] = hexDigits.charAt((ch & 0x00F0) >>> 4);
8
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368 buf[1] = hexDigits.charAt(ch & 0x0F);
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369 return buf;
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
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parents: 1
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370 }
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371
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372 // TODO handle . and .. (although unlikely to face them from GUI client)
3
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373 private static String normalize(String path) {
8
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374 path = path.replace('\\', '/').replace("//", "/");
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375 if (path.startsWith("/")) {
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376 path = path.substring(1);
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377 }
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378 return path;
3
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379 }
1
a3576694a4d1 Repository detection from local/specified directory
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parents:
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380 }