Mercurial > hg4j

annotate src/com/tmate/hgkit/ll/LocalHgRepo.java @ 37:e45e75e22523

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Parse changesets from bundle's changelog group. Refactor Revlog to provide access to revision's raw content
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 14 Jan 2011 00:49:58 +0100
parents d4fdd1845b3f
children f1db8610da62
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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17
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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
3
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253 private final HashMap<String, SoftReference<RevlogStream>> streamsCache = new HashMap<String, SoftReference<RevlogStream>>();
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254
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255 /**
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256 * path - repository storage path (i.e. one usually with .i or .d)
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257 */
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258 @Override
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259 protected RevlogStream resolve(String path) {
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260 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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261 RevlogStream cached = ref == null ? null : ref.get();
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262 if (cached != null) {
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263 return cached;
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264 }
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265 File f = new File(repoDir, path);
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266 if (f.exists()) {
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267 RevlogStream s = new RevlogStream(dataAccess, f);
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268 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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269 return s;
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270 }
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271 return null;
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272 }
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273
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274 @Override
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275 public HgDataFile getFileNode(String path) {
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276 String nPath = normalize(path);
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277 String storagePath = toStoragePath(nPath, true);
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278 RevlogStream content = resolve(storagePath);
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279 // 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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280 return new HgDataFile(this, nPath, content);
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281 }
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282
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283 private boolean revlogv1;
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284 private boolean store;
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285 private boolean fncache;
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286 private boolean dotencode;
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287
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288
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289 private void parseRequires() {
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290 File requiresFile = new File(repoDir, "requires");
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291 if (!requiresFile.exists()) {
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292 return;
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293 }
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294 try {
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295 BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(requiresFile)));
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296 String line;
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297 while ((line = br.readLine()) != null) {
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298 revlogv1 |= "revlogv1".equals(line);
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299 store |= "store".equals(line);
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300 fncache |= "fncache".equals(line);
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301 dotencode |= "dotencode".equals(line);
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302 }
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303 } catch (IOException ex) {
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304 ex.printStackTrace(); // FIXME log
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305 }
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306 }
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307
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308 // FIXME document what path argument is, whether it includes .i or .d, and whether it's 'normalized' (slashes) or not.
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309 // since .hg/store keeps both .i files and files without extension (e.g. fncache), guees, for data == false
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310 // we shall assume path has extension
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311 // FIXME much more to be done, see store.py:_hybridencode
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312 // @see http://mercurial.selenic.com/wiki/CaseFoldingPlan
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313 @Override
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314 protected String toStoragePath(String path, boolean data) {
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315 path = normalize(path);
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316 final String STR_STORE = "store/";
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317 final String STR_DATA = "data/";
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318 final String STR_DH = "dh/";
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319 if (!data) {
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320 return this.store ? STR_STORE + path : path;
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321 }
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322 path = path.replace(".hg/", ".hg.hg/").replace(".i/", ".i.hg/").replace(".d/", ".d.hg/");
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323 StringBuilder sb = new StringBuilder(path.length() << 1);
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324 if (store || fncache) {
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325 // encodefilename
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326 final String reservedChars = "\\:*?\"<>|";
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327 // in fact, \\ is unlikely to match, ever - we've replaced all of them already, above. Just regards to store.py
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328 int x;
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329 char[] hexByte = new char[2];
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330 for (int i = 0; i < path.length(); i++) {
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331 final char ch = path.charAt(i);
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332 if (ch >= 'a' && ch <= 'z') {
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333 sb.append(ch); // POIRAE
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334 } else if (ch >= 'A' && ch <= 'Z') {
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335 sb.append('_');
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336 sb.append(Character.toLowerCase(ch)); // Perhaps, (char) (((int) ch) + 32)? Even better, |= 0x20?
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337 } else if ( (x = reservedChars.indexOf(ch)) != -1) {
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338 sb.append('~');
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339 sb.append(toHexByte(reservedChars.charAt(x), hexByte));
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340 } else if ((ch >= '~' /*126*/ && ch <= 255) || ch < ' ' /*32*/) {
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341 sb.append('~');
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342 sb.append(toHexByte(ch, hexByte));
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343 } else if (ch == '_') {
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344 // note, encoding from store.py:_buildencodefun and :_build_lower_encodefun
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345 // differ in the way they process '_' (latter doesn't escape it)
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346 sb.append('_');
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347 sb.append('_');
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348 } else {
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349 sb.append(ch);
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350 }
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351 }
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352 // auxencode
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353 if (fncache) {
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354 x = 0; // last segment start
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355 final TreeSet<String> windowsReservedFilenames = new TreeSet<String>();
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356 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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357 do {
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358 int i = sb.indexOf("/", x);
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359 if (i == -1) {
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360 i = sb.length();
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361 }
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362 // windows reserved filenames are at least of length 3
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363 if (i - x >= 3) {
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364 boolean found = false;
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365 if (i-x == 3) {
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366 found = windowsReservedFilenames.contains(sb.subSequence(x, i));
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367 } else if (sb.charAt(x+3) == '.') { // implicit i-x > 3
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368 found = windowsReservedFilenames.contains(sb.subSequence(x, x+3));
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369 } else if (i-x > 4 && sb.charAt(x+4) == '.') {
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370 found = windowsReservedFilenames.contains(sb.subSequence(x, x+4));
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371 }
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372 if (found) {
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373 sb.setCharAt(x, '~');
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374 sb.insert(x+1, toHexByte(sb.charAt(x+2), hexByte));
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375 i += 2;
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376 }
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377 }
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378 if (dotencode && (sb.charAt(x) == '.' || sb.charAt(x) == ' ')) {
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379 sb.insert(x+1, toHexByte(sb.charAt(x), hexByte));
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380 sb.setCharAt(x, '~'); // setChar *after* charAt/insert to get ~2e, not ~7e for '.'
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381 i += 2;
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382 }
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383 x = i+1;
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384 } while (x < sb.length());
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385 }
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386 }
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387 final int MAX_PATH_LEN_IN_HGSTORE = 120;
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388 if (fncache && (sb.length() + STR_DATA.length() > MAX_PATH_LEN_IN_HGSTORE)) {
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389 throw HgRepository.notImplemented(); // FIXME digest and fncache use
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390 }
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391 if (this.store) {
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392 sb.insert(0, STR_STORE + STR_DATA);
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393 }
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394 sb.append(".i");
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395 return sb.toString();
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396 }
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diff changeset
397
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398 private static char[] toHexByte(int ch, char[] buf) {
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399 assert buf.length > 1;
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400 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
401 buf[0] = hexDigits.charAt((ch & 0x00F0) >>> 4);
8
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402 buf[1] = hexDigits.charAt(ch & 0x0F);
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diff changeset
403 return buf;
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
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parents: 1
diff changeset
404 }
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parents: 1
diff changeset
405
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406 // TODO handle . and .. (although unlikely to face them from GUI client)
3
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diff changeset
407 private static String normalize(String path) {
8
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408 path = path.replace('\\', '/').replace("//", "/");
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parents: 3
diff changeset
409 if (path.startsWith("/")) {
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diff changeset
410 path = path.substring(1);
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411 }
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diff changeset
412 return path;
3
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diff changeset
413 }
21
e929cecae4e1 Refactor to move revlog content to base class
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parents: 20
diff changeset
414
22
603806cd2dc6 Status of local working dir against non-tip base revision
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diff changeset
415 // XXX idsMap is being modified from outside. It's better to let outer (modifying) code to create these maps instead
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diff changeset
416 private static final class ManifestRevisionCollector implements HgManifest.Inspector {
21
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diff changeset
417 final HashMap<String, Nodeid> idsMap = new HashMap<String, Nodeid>();
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diff changeset
418 final HashMap<String, String> flagsMap = new HashMap<String, String>();
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parents: 20
diff changeset
419
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diff changeset
420 public boolean next(Nodeid nid, String fname, String flags) {
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diff changeset
421 idsMap.put(fname, nid);
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diff changeset
422 flagsMap.put(fname, flags);
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diff changeset
423 return true;
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diff changeset
424 }
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parents: 20
diff changeset
425
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diff changeset
426 public boolean end(int revision) {
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diff changeset
427 return false;
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diff changeset
428 }
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parents: 20
diff changeset
429
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diff changeset
430 public boolean begin(int revision, Nodeid nid) {
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diff changeset
431 return true;
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diff changeset
432 }
e929cecae4e1 Refactor to move revlog content to base class
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diff changeset
433 }
1
a3576694a4d1 Repository detection from local/specified directory
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parents:
diff changeset
434 }