Mercurial > jhg

annotate src/com/tmate/hgkit/ll/LocalHgRepo.java @ 51:9429c7bd1920 wrap-data-access

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Try DataAccess to reach revision data instead of plain byte arrays
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sun, 16 Jan 2011 01:20:26 +0100
parents f1db8610da62
children 05829a70b30b
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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48
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49 @Override
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50 public void status(int rev1, int rev2, final StatusInspector inspector) {
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51 final ManifestRevisionCollector collect = new ManifestRevisionCollector();
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52 getManifest().walk(rev1, rev1, collect);
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53
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54 HgManifest.Inspector compare = new HgManifest.Inspector() {
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55
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56 public boolean begin(int revision, Nodeid nid) {
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57 return true;
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58 }
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59
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60 public boolean next(Nodeid nid, String fname, String flags) {
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61 Nodeid nidR1 = collect.idsMap.remove(fname);
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62 String flagsR1 = collect.flagsMap.remove(fname);
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63 if (nidR1 == null) {
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64 inspector.added(fname);
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65 } else {
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66 if (nidR1.equals(nid) && ((flags == null && flagsR1 == null) || flags.equals(flagsR1))) {
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67 inspector.clean(fname);
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68 } else {
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69 inspector.modified(fname);
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70 }
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71 }
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72 return true;
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73 }
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74
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75 public boolean end(int revision) {
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76 for (String fname : collect.idsMap.keySet()) {
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77 inspector.removed(fname);
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78 }
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79 if (collect.idsMap.size() != collect.flagsMap.size()) {
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80 throw new IllegalStateException();
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81 }
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82 return false;
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83 }
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84 };
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85 getManifest().walk(rev2, rev2, compare);
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86 }
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87
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88 public void statusLocal(int baseRevision, StatusInspector inspector) {
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89 LinkedList<File> folders = new LinkedList<File>();
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90 final File rootDir = repoDir.getParentFile();
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91 folders.add(rootDir);
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92 final HgDirstate dirstate = loadDirstate();
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93 final HgIgnore hgignore = loadIgnore();
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94 TreeSet<String> knownEntries = dirstate.all();
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95 final boolean isTipBase = baseRevision == TIP || baseRevision == getManifest().getRevisionCount();
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96 final ManifestRevisionCollector collect = isTipBase ? null : new ManifestRevisionCollector();
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97 if (!isTipBase) {
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98 getManifest().walk(baseRevision, baseRevision, collect);
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99 }
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100 do {
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101 File d = folders.removeFirst();
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102 for (File f : d.listFiles()) {
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103 if (f.isDirectory()) {
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104 if (!".hg".equals(f.getName())) {
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105 folders.addLast(f);
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106 }
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107 } else {
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108 // FIXME path relative to rootDir - need more robust approach
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109 String fname = normalize(f.getPath().substring(rootDir.getPath().length() + 1));
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110 if (hgignore.isIgnored(fname)) {
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111 inspector.ignored(fname);
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112 } else {
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113 if (knownEntries.remove(fname)) {
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114 // modified, added, removed, clean
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115 if (collect != null) { // need to check against base revision, not FS file
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116 checkLocalStatusAgainstBaseRevision(collect, fname, f, dirstate, inspector);
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117 } else {
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118 checkLocalStatusAgainstFile(fname, f, dirstate, inspector);
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119 }
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120 } else {
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121 inspector.unknown(fname);
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122 }
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123 }
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124 }
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125 }
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126 } while (!folders.isEmpty());
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127 if (collect != null) {
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128 for (String r : collect.idsMap.keySet()) {
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129 inspector.removed(r);
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130 }
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131 }
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132 for (String m : knownEntries) {
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133 // removed from the repository and missing from working dir shall not be reported as 'deleted'
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134 if (dirstate.checkRemoved(m) == null) {
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135 inspector.missing(m);
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136 }
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137 }
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138 }
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139
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140 private static void checkLocalStatusAgainstFile(String fname, File f, HgDirstate dirstate, StatusInspector inspector) {
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141 HgDirstate.Record r;
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142 if ((r = dirstate.checkNormal(fname)) != null) {
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143 // either clean or modified
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144 if (f.lastModified() / 1000 == r.time && r.size == f.length()) {
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145 inspector.clean(fname);
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146 } else {
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147 // FIXME check actual content to avoid false modified files
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148 inspector.modified(fname);
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149 }
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150 } else if ((r = dirstate.checkAdded(fname)) != null) {
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151 if (r.name2 == null) {
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152 inspector.added(fname);
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153 } else {
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154 inspector.copied(fname, r.name2);
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155 }
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156 } else if ((r = dirstate.checkRemoved(fname)) != null) {
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157 inspector.removed(fname);
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158 } else if ((r = dirstate.checkMerged(fname)) != null) {
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159 inspector.modified(fname);
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160 }
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161 }
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162
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163 // XXX refactor checkLocalStatus methods in more OO way
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164 private void checkLocalStatusAgainstBaseRevision(ManifestRevisionCollector collect, String fname, File f, HgDirstate dirstate, StatusInspector inspector) {
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165 // fname is in the dirstate, either Normal, Added, Removed or Merged
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166 Nodeid nid1 = collect.idsMap.remove(fname);
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167 String flags = collect.flagsMap.remove(fname);
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168 HgDirstate.Record r;
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169 if (nid1 == null) {
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170 // normal: added?
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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 = dirstate.checkAdded(fname)) != null) {
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174 if (r.name2 != null && collect.idsMap.containsKey(r.name2)) {
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175 collect.idsMap.remove(r.name2);
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176 collect.idsMap.remove(r.name2);
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177 inspector.copied(r.name2, fname);
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178 return;
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179 }
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180 // fall-through, report as added
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181 } else if (dirstate.checkRemoved(fname) != null) {
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182 // removed: removed file was not known at the time of baseRevision, and we should not report it as removed
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183 return;
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184 }
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185 inspector.added(fname);
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186 } else {
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187 // was known; check whether clean or modified
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188 // 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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189 if ((r = dirstate.checkNormal(fname)) != null || (r = dirstate.checkMerged(fname)) != null || (r = dirstate.checkAdded(fname)) != null) {
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190 // either clean or modified
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191 HgDataFile fileNode = getFileNode(fname);
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192 final int lengthAtRevision = fileNode.length(nid1);
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193 if (r.size /* XXX File.length() ?! */ != lengthAtRevision || flags != todoGenerateFlags(fname /*java.io.File*/)) {
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194 inspector.modified(fname);
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195 } else {
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196 // check actual content to see actual changes
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197 // XXX consider adding HgDataDile.compare(File/byte[]/whatever) operation to optimize comparison
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198 if (areTheSame(f, fileNode.content(nid1))) {
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199 inspector.clean(fname);
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200 } else {
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201 inspector.modified(fname);
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202 }
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203 }
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204 }
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205 // only those left in idsMap after processing are reported as removed
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206 }
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207
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208 // 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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209 // 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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210 // 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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211 // changeset nodeid + hash(actual content) => entry (Nodeid) in the next Manifest
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212 // 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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213 // The question is whether original Hg treats this case (same content, different parents and hence nodeids) as 'modified' or 'clean'
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214 }
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215
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216 private static String todoGenerateFlags(String fname) {
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217 // FIXME implement
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218 return null;
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219 }
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220 private static boolean areTheSame(File f, byte[] data) {
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221 try {
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222 BufferedInputStream is = new BufferedInputStream(new FileInputStream(f));
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223 int i = 0;
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224 while (i < data.length && data[i] == is.read()) {
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225 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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226 }
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227 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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228 } catch (IOException ex) {
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229 ex.printStackTrace(); // log warn
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230 }
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231 return false;
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232 }
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233
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234 // 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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235 public final HgDirstate loadDirstate() {
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236 // XXX may cache in SoftReference if creation is expensive
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237 return new HgDirstate(this, new File(repoDir, "dirstate"));
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238 }
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239
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240 // package-local, see comment for loadDirstate
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241 public final HgIgnore loadIgnore() {
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242 return new HgIgnore(this);
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243 }
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244
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245 /*package-local*/ DataAccessProvider getDataAccess() {
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246 return dataAccess;
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247 }
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248
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249 /*package-local*/ File getRepositoryRoot() {
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250 return repoDir;
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251 }
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252
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253 @Override
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254 protected HgTags createTags() {
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255 return new HgTags();
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256 }
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257
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258 private final HashMap<String, SoftReference<RevlogStream>> streamsCache = new HashMap<String, SoftReference<RevlogStream>>();
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259
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260 /**
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261 * path - repository storage path (i.e. one usually with .i or .d)
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262 */
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263 @Override
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264 protected RevlogStream resolve(String path) {
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265 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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266 RevlogStream cached = ref == null ? null : ref.get();
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267 if (cached != null) {
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268 return cached;
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269 }
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270 File f = new File(repoDir, path);
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271 if (f.exists()) {
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272 RevlogStream s = new RevlogStream(dataAccess, f);
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273 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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274 return s;
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275 }
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276 return null;
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277 }
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278
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279 @Override
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280 public HgDataFile getFileNode(String path) {
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281 String nPath = normalize(path);
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282 String storagePath = toStoragePath(nPath, true);
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283 RevlogStream content = resolve(storagePath);
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284 // 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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285 return new HgDataFile(this, nPath, content);
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286 }
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287
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288 private boolean revlogv1;
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289 private boolean store;
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290 private boolean fncache;
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291 private boolean dotencode;
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292
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293
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294 private void parseRequires() {
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295 File requiresFile = new File(repoDir, "requires");
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296 if (!requiresFile.exists()) {
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297 return;
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298 }
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299 try {
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300 BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(requiresFile)));
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301 String line;
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302 while ((line = br.readLine()) != null) {
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303 revlogv1 |= "revlogv1".equals(line);
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304 store |= "store".equals(line);
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305 fncache |= "fncache".equals(line);
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306 dotencode |= "dotencode".equals(line);
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307 }
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308 } catch (IOException ex) {
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309 ex.printStackTrace(); // FIXME log
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310 }
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311 }
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312
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313 // FIXME document what path argument is, whether it includes .i or .d, and whether it's 'normalized' (slashes) or not.
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314 // since .hg/store keeps both .i files and files without extension (e.g. fncache), guees, for data == false
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315 // we shall assume path has extension
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316 // FIXME much more to be done, see store.py:_hybridencode
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317 // @see http://mercurial.selenic.com/wiki/CaseFoldingPlan
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318 @Override
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319 protected String toStoragePath(String path, boolean data) {
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320 path = normalize(path);
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321 final String STR_STORE = "store/";
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322 final String STR_DATA = "data/";
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323 final String STR_DH = "dh/";
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324 if (!data) {
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325 return this.store ? STR_STORE + path : path;
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326 }
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327 path = path.replace(".hg/", ".hg.hg/").replace(".i/", ".i.hg/").replace(".d/", ".d.hg/");
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328 StringBuilder sb = new StringBuilder(path.length() << 1);
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329 if (store || fncache) {
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330 // encodefilename
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331 final String reservedChars = "\\:*?\"<>|";
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332 // in fact, \\ is unlikely to match, ever - we've replaced all of them already, above. Just regards to store.py
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333 int x;
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334 char[] hexByte = new char[2];
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335 for (int i = 0; i < path.length(); i++) {
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336 final char ch = path.charAt(i);
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337 if (ch >= 'a' && ch <= 'z') {
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338 sb.append(ch); // POIRAE
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339 } else if (ch >= 'A' && ch <= 'Z') {
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340 sb.append('_');
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341 sb.append(Character.toLowerCase(ch)); // Perhaps, (char) (((int) ch) + 32)? Even better, |= 0x20?
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342 } else if ( (x = reservedChars.indexOf(ch)) != -1) {
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343 sb.append('~');
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344 sb.append(toHexByte(reservedChars.charAt(x), hexByte));
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345 } else if ((ch >= '~' /*126*/ && ch <= 255) || ch < ' ' /*32*/) {
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346 sb.append('~');
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347 sb.append(toHexByte(ch, hexByte));
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348 } else if (ch == '_') {
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349 // note, encoding from store.py:_buildencodefun and :_build_lower_encodefun
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350 // differ in the way they process '_' (latter doesn't escape it)
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351 sb.append('_');
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352 sb.append('_');
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353 } else {
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354 sb.append(ch);
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355 }
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356 }
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357 // auxencode
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358 if (fncache) {
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359 x = 0; // last segment start
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360 final TreeSet<String> windowsReservedFilenames = new TreeSet<String>();
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361 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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362 do {
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363 int i = sb.indexOf("/", x);
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364 if (i == -1) {
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365 i = sb.length();
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366 }
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367 // windows reserved filenames are at least of length 3
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368 if (i - x >= 3) {
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369 boolean found = false;
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370 if (i-x == 3) {
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371 found = windowsReservedFilenames.contains(sb.subSequence(x, i));
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372 } else if (sb.charAt(x+3) == '.') { // implicit i-x > 3
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373 found = windowsReservedFilenames.contains(sb.subSequence(x, x+3));
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374 } else if (i-x > 4 && sb.charAt(x+4) == '.') {
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parents: 3
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375 found = windowsReservedFilenames.contains(sb.subSequence(x, x+4));
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376 }
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377 if (found) {
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diff changeset
378 sb.setCharAt(x, '~');
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379 sb.insert(x+1, toHexByte(sb.charAt(x+2), hexByte));
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380 i += 2;
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381 }
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382 }
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diff changeset
383 if (dotencode && (sb.charAt(x) == '.' || sb.charAt(x) == ' ')) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 3
diff changeset
384 sb.insert(x+1, toHexByte(sb.charAt(x), hexByte));
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parents: 3
diff changeset
385 sb.setCharAt(x, '~'); // setChar *after* charAt/insert to get ~2e, not ~7e for '.'
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386 i += 2;
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387 }
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388 x = i+1;
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diff changeset
389 } while (x < sb.length());
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parents: 3
diff changeset
390 }
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parents: 3
diff changeset
391 }
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parents: 3
diff changeset
392 final int MAX_PATH_LEN_IN_HGSTORE = 120;
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parents: 3
diff changeset
393 if (fncache && (sb.length() + STR_DATA.length() > MAX_PATH_LEN_IN_HGSTORE)) {
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parents: 3
diff changeset
394 throw HgRepository.notImplemented(); // FIXME digest and fncache use
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parents: 3
diff changeset
395 }
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diff changeset
396 if (this.store) {
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diff changeset
397 sb.insert(0, STR_STORE + STR_DATA);
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parents: 3
diff changeset
398 }
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diff changeset
399 sb.append(".i");
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diff changeset
400 return sb.toString();
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parents: 3
diff changeset
401 }
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parents: 3
diff changeset
402
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diff changeset
403 private static char[] toHexByte(int ch, char[] buf) {
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parents: 3
diff changeset
404 assert buf.length > 1;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 3
diff changeset
405 final String hexDigits = "0123456789abcdef";
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
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parents: 8
diff changeset
406 buf[0] = hexDigits.charAt((ch & 0x00F0) >>> 4);
8
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parents: 3
diff changeset
407 buf[1] = hexDigits.charAt(ch & 0x0F);
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parents: 3
diff changeset
408 return buf;
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
409 }
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
410
9
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parents: 8
diff changeset
411 // TODO handle . and .. (although unlikely to face them from GUI client)
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
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parents: 1
diff changeset
412 private static String normalize(String path) {
8
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parents: 3
diff changeset
413 path = path.replace('\\', '/').replace("//", "/");
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parents: 3
diff changeset
414 if (path.startsWith("/")) {
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parents: 3
diff changeset
415 path = path.substring(1);
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parents: 3
diff changeset
416 }
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parents: 3
diff changeset
417 return path;
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
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parents: 1
diff changeset
418 }
21
e929cecae4e1 Refactor to move revlog content to base class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 20
diff changeset
419
22
603806cd2dc6 Status of local working dir against non-tip base revision
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parents: 21
diff changeset
420 // XXX idsMap is being modified from outside. It's better to let outer (modifying) code to create these maps instead
603806cd2dc6 Status of local working dir against non-tip base revision
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parents: 21
diff changeset
421 private static final class ManifestRevisionCollector implements HgManifest.Inspector {
21
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parents: 20
diff changeset
422 final HashMap<String, Nodeid> idsMap = new HashMap<String, Nodeid>();
e929cecae4e1 Refactor to move revlog content to base class
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parents: 20
diff changeset
423 final HashMap<String, String> flagsMap = new HashMap<String, String>();
e929cecae4e1 Refactor to move revlog content to base class
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parents: 20
diff changeset
424
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parents: 20
diff changeset
425 public boolean next(Nodeid nid, String fname, String flags) {
e929cecae4e1 Refactor to move revlog content to base class
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parents: 20
diff changeset
426 idsMap.put(fname, nid);
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parents: 20
diff changeset
427 flagsMap.put(fname, flags);
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diff changeset
428 return true;
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parents: 20
diff changeset
429 }
e929cecae4e1 Refactor to move revlog content to base class
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parents: 20
diff changeset
430
e929cecae4e1 Refactor to move revlog content to base class
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parents: 20
diff changeset
431 public boolean end(int revision) {
e929cecae4e1 Refactor to move revlog content to base class
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diff changeset
432 return false;
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parents: 20
diff changeset
433 }
e929cecae4e1 Refactor to move revlog content to base class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 20
diff changeset
434
e929cecae4e1 Refactor to move revlog content to base class
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parents: 20
diff changeset
435 public boolean begin(int revision, Nodeid nid) {
e929cecae4e1 Refactor to move revlog content to base class
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parents: 20
diff changeset
436 return true;
e929cecae4e1 Refactor to move revlog content to base class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 20
diff changeset
437 }
e929cecae4e1 Refactor to move revlog content to base class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 20
diff changeset
438 }
1
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
439 }