annotate src/org/tmatesoft/hg/repo/HgWorkingCopyStatusCollector.java @ 227:0fd10e5016dd

IOException on empty repository with 40-byte dirstate
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 25 May 2011 13:13:36 +0200
parents 26ad7827a62d
children 1ec6b327a6ac
rev   line source
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1 /*
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2 * Copyright (c) 2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.repo;
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18
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19 import static java.lang.Math.max;
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20 import static java.lang.Math.min;
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21 import static org.tmatesoft.hg.repo.HgRepository.*;
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22 import static org.tmatesoft.hg.repo.HgRepository.BAD_REVISION;
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23 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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25 import java.io.File;
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26 import java.io.FileInputStream;
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27 import java.io.IOException;
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28 import java.nio.ByteBuffer;
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29 import java.nio.channels.FileChannel;
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30 import java.util.Collections;
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31 import java.util.NoSuchElementException;
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32 import java.util.Set;
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33 import java.util.TreeSet;
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34
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35 import org.tmatesoft.hg.core.HgDataStreamException;
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36 import org.tmatesoft.hg.core.HgException;
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37 import org.tmatesoft.hg.core.Nodeid;
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38 import org.tmatesoft.hg.internal.ByteArrayChannel;
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39 import org.tmatesoft.hg.internal.Experimental;
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40 import org.tmatesoft.hg.internal.FilterByteChannel;
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41 import org.tmatesoft.hg.internal.RelativePathRewrite;
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42 import org.tmatesoft.hg.repo.HgStatusCollector.ManifestRevisionInspector;
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43 import org.tmatesoft.hg.util.ByteChannel;
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44 import org.tmatesoft.hg.util.CancelledException;
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45 import org.tmatesoft.hg.util.FileIterator;
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46 import org.tmatesoft.hg.util.FileWalker;
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47 import org.tmatesoft.hg.util.Path;
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48 import org.tmatesoft.hg.util.PathPool;
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49 import org.tmatesoft.hg.util.PathRewrite;
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51 /**
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52 *
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53 * @author Artem Tikhomirov
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54 * @author TMate Software Ltd.
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55 */
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56 public class HgWorkingCopyStatusCollector {
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58 private final HgRepository repo;
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59 private final FileIterator repoWalker;
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60 private HgDirstate dirstate;
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61 private HgStatusCollector baseRevisionCollector;
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62 private PathPool pathPool;
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63
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64 public HgWorkingCopyStatusCollector(HgRepository hgRepo) {
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65 this(hgRepo, hgRepo.createWorkingDirWalker());
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66 }
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67
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68 HgWorkingCopyStatusCollector(HgRepository hgRepo, FileIterator hgRepoWalker) {
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69 repo = hgRepo;
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70 repoWalker = hgRepoWalker;
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71 }
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73 /**
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74 * Optionally, supply a collector instance that may cache (or have already cached) base revision
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75 * @param sc may be null
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76 */
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77 public void setBaseRevisionCollector(HgStatusCollector sc) {
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78 baseRevisionCollector = sc;
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79 }
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81 /*package-local*/ PathPool getPathPool() {
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82 if (pathPool == null) {
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83 if (baseRevisionCollector == null) {
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84 pathPool = new PathPool(new PathRewrite.Empty());
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85 } else {
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86 return baseRevisionCollector.getPathPool();
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87 }
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88 }
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89 return pathPool;
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90 }
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91
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92 public void setPathPool(PathPool pathPool) {
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93 this.pathPool = pathPool;
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94 }
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95
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97 private HgDirstate getDirstate() {
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98 if (dirstate == null) {
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99 dirstate = repo.loadDirstate();
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100 }
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101 return dirstate;
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102 }
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103
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104 // may be invoked few times
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105 public void walk(int baseRevision, HgStatusInspector inspector) {
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106 if (HgInternals.wrongLocalRevision(baseRevision) || baseRevision == BAD_REVISION || baseRevision == WORKING_COPY) {
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107 throw new IllegalArgumentException(String.valueOf(baseRevision));
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108 }
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109 final HgIgnore hgIgnore = repo.getIgnore();
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110 TreeSet<String> knownEntries = getDirstate().all();
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111 final boolean isTipBase;
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112 if (baseRevision == TIP) {
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113 baseRevision = repo.getChangelog().getLastRevision();
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114 isTipBase = true;
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115 } else {
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116 isTipBase = baseRevision == repo.getChangelog().getLastRevision();
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117 }
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118 HgStatusCollector.ManifestRevisionInspector collect = null;
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119 Set<String> baseRevFiles = Collections.emptySet(); // files from base revision not affected by status calculation
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120 if (!isTipBase) {
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121 if (baseRevisionCollector != null) {
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122 collect = baseRevisionCollector.raw(baseRevision);
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123 } else {
195
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124 collect = new HgStatusCollector.ManifestRevisionInspector(null, null);
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125 repo.getManifest().walk(baseRevision, baseRevision, collect);
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126 }
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127 baseRevFiles = new TreeSet<String>(collect.files());
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128 }
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129 if (inspector instanceof HgStatusCollector.Record) {
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130 HgStatusCollector sc = baseRevisionCollector == null ? new HgStatusCollector(repo) : baseRevisionCollector;
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131 ((HgStatusCollector.Record) inspector).init(baseRevision, BAD_REVISION, sc);
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132 }
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133 repoWalker.reset();
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134 final PathPool pp = getPathPool();
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135 while (repoWalker.hasNext()) {
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136 repoWalker.next();
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137 Path fname = pp.path(repoWalker.name());
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138 File f = repoWalker.file();
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139 assert f.isFile();
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140 if (!f.exists()) {
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141 // file coming from iterator doesn't exist.
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142 if (knownEntries.remove(fname.toString())) {
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143 if (getDirstate().checkRemoved(fname) == null) {
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144 inspector.missing(fname);
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145 } else {
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146 inspector.removed(fname);
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147 }
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148 // do not report it as removed later
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149 if (collect != null) {
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150 baseRevFiles.remove(fname.toString());
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151 }
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152 } else {
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153 // chances are it was known in baseRevision. We may rely
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154 // that later iteration over baseRevFiles leftovers would yield correct Removed,
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155 // but it doesn't hurt to be explicit (provided we know fname *is* inScope of the FileIterator
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156 if (collect != null && baseRevFiles.remove(fname.toString())) {
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157 inspector.removed(fname);
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158 } else {
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159 // not sure I shall report such files (i.e. arbitrary name coming from FileIterator)
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160 // as unknown. Command-line HG aborts "system can't find the file specified"
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161 // in similar case (against wc), or just gives nothing if --change <rev> is specified.
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162 // however, as it's unlikely to get unexisting files from FileIterator, and
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163 // its better to see erroneous file status rather than not to see any (which is too easy
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164 // to overlook), I think unknown() is reasonable approach here
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165 inspector.unknown(fname);
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166 }
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167 }
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168 continue;
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169 }
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170 if (knownEntries.remove(fname.toString())) {
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171 // tracked file.
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172 // modified, added, removed, clean
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173 if (collect != null) { // need to check against base revision, not FS file
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174 checkLocalStatusAgainstBaseRevision(baseRevFiles, collect, baseRevision, fname, f, inspector);
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175 } else {
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176 checkLocalStatusAgainstFile(fname, f, inspector);
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177 }
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178 } else {
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179 if (hgIgnore.isIgnored(fname)) { // hgignore shall be consulted only for non-tracked files
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180 inspector.ignored(fname);
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181 } else {
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182 inspector.unknown(fname);
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183 }
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184 // the file is not tracked. Even if it's known at baseRevision, we don't need to remove it
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185 // from baseRevFiles, it might need to be reported as removed as well (cmdline client does
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186 // yield two statuses for the same file)
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187 }
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188 }
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189 if (collect != null) {
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190 for (String r : baseRevFiles) {
226
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191 final Path fromBase = pp.path(r);
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192 if (repoWalker.inScope(fromBase)) {
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193 inspector.removed(fromBase);
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194 }
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195 }
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196 }
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197 for (String m : knownEntries) {
226
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198 if (!repoWalker.inScope(pp.path(m))) {
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199 // do not report as missing/removed those FileIterator doesn't care about.
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200 continue;
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201 }
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202 // missing known file from a working dir
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203 if (getDirstate().checkRemoved(m) == null) {
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204 // not removed from the repository = 'deleted'
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205 inspector.missing(pp.path(m));
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206 } else {
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207 // removed from the repo
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208 // if we check against non-tip revision, do not report files that were added past that revision and now removed.
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209 if (collect == null || baseRevFiles.contains(m)) {
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210 inspector.removed(pp.path(m));
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211 }
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212 }
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213 }
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214 }
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215
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216 public HgStatusCollector.Record status(int baseRevision) {
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217 HgStatusCollector.Record rv = new HgStatusCollector.Record();
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218 walk(baseRevision, rv);
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219 return rv;
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220 }
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221
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222 //********************************************
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223
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224
141
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225 private void checkLocalStatusAgainstFile(Path fname, File f, HgStatusInspector inspector) {
58
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226 HgDirstate.Record r;
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227 if ((r = getDirstate().checkNormal(fname)) != null) {
58
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228 // either clean or modified
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229 if (f.lastModified() / 1000 == r.time && r.size == f.length()) {
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230 inspector.clean(getPathPool().path(fname));
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231 } else {
120
b19f0ac5ee62 Check against working copy shall expect non-persistent modifications done by filters and not report such files as modified
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232 // check actual content to avoid false modified files
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233 HgDataFile df = repo.getFileNode(fname);
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234 if (!areTheSame(f, df, HgRepository.TIP)) {
120
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235 inspector.modified(df.getPath());
180
42fe9a94b9d0 Report files as clean when no difference but timestamp found
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236 } else {
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237 inspector.clean(df.getPath());
120
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238 }
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239 }
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240 } else if ((r = getDirstate().checkAdded(fname)) != null) {
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241 if (r.name2 == null) {
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242 inspector.added(getPathPool().path(fname));
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243 } else {
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244 inspector.copied(getPathPool().path(r.name2), getPathPool().path(fname));
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245 }
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246 } else if ((r = getDirstate().checkRemoved(fname)) != null) {
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247 inspector.removed(getPathPool().path(fname));
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248 } else if ((r = getDirstate().checkMerged(fname)) != null) {
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249 inspector.modified(getPathPool().path(fname));
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250 }
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251 }
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252
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253 // XXX refactor checkLocalStatus methods in more OO way
141
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254 private void checkLocalStatusAgainstBaseRevision(Set<String> baseRevNames, ManifestRevisionInspector collect, int baseRevision, Path fname, File f, HgStatusInspector inspector) {
58
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255 // fname is in the dirstate, either Normal, Added, Removed or Merged
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256 Nodeid nid1 = collect.nodeid(fname.toString());
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257 String flags = collect.flags(fname.toString());
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258 HgDirstate.Record r;
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259 if (nid1 == null) {
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260 // normal: added?
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261 // added: not known at the time of baseRevision, shall report
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262 // merged: was not known, report as added?
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263 if ((r = getDirstate().checkNormal(fname)) != null) {
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264 try {
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265 Path origin = HgStatusCollector.getOriginIfCopy(repo, fname, baseRevNames, baseRevision);
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266 if (origin != null) {
226
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267 inspector.copied(getPathPool().path(origin), fname);
157
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268 return;
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269 }
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270 } catch (HgDataStreamException ex) {
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271 ex.printStackTrace();
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272 // FIXME report to a mediator, continue status collection
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273 }
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274 } else if ((r = getDirstate().checkAdded(fname)) != null) {
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275 if (r.name2 != null && baseRevNames.contains(r.name2)) {
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276 baseRevNames.remove(r.name2); // XXX surely I shall not report rename source as Removed?
226
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277 inspector.copied(getPathPool().path(r.name2), fname);
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278 return;
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279 }
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280 // fall-through, report as added
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281 } else if (getDirstate().checkRemoved(fname) != null) {
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282 // removed: removed file was not known at the time of baseRevision, and we should not report it as removed
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283 return;
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284 }
226
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diff changeset
285 inspector.added(fname);
58
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286 } else {
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diff changeset
287 // was known; check whether clean or modified
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288 // 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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diff changeset
289 if ((r = getDirstate().checkNormal(fname)) != null || (r = getDirstate().checkMerged(fname)) != null || (r = getDirstate().checkAdded(fname)) != null) {
58
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290 // either clean or modified
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291 HgDataFile fileNode = repo.getFileNode(fname);
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diff changeset
292 final int lengthAtRevision = fileNode.length(nid1);
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diff changeset
293 if (r.size /* XXX File.length() ?! */ != lengthAtRevision || flags != todoGenerateFlags(fname /*java.io.File*/)) {
226
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diff changeset
294 inspector.modified(fname);
58
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295 } else {
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diff changeset
296 // check actual content to see actual changes
157
d5268ca7715b Merged branch wrap-data-access into default for resource-friendly data access. Updated API to promote that friendliness to clients (channels, not byte[]). More exceptions
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diff changeset
297 if (areTheSame(f, fileNode, fileNode.getLocalRevision(nid1))) {
226
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diff changeset
298 inspector.clean(fname);
58
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299 } else {
226
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diff changeset
300 inspector.modified(fname);
58
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301 }
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302 }
226
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diff changeset
303 baseRevNames.remove(fname.toString()); // consumed, processed, handled.
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304 } else if (getDirstate().checkRemoved(fname) != null) {
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305 // was known, and now marked as removed, report it right away, do not rely on baseRevNames processing later
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diff changeset
306 inspector.removed(fname);
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diff changeset
307 baseRevNames.remove(fname.toString()); // consumed, processed, handled.
58
4cfc47bc14cc Status against local working dir extracted into distinct class. Iterating over local files extracted for ease of os-dependant patching
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diff changeset
308 }
226
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diff changeset
309 // only those left in baseRevNames after processing are reported as removed
58
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310 }
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diff changeset
311
4cfc47bc14cc Status against local working dir extracted into distinct class. Iterating over local files extracted for ease of os-dependant patching
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diff changeset
312 // 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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diff changeset
313 // 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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parents:
diff changeset
314 // 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:
4cfc47bc14cc Status against local working dir extracted into distinct class. Iterating over local files extracted for ease of os-dependant patching
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diff changeset
315 // changeset nodeid + hash(actual content) => entry (Nodeid) in the next Manifest
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316 // 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).
4cfc47bc14cc Status against local working dir extracted into distinct class. Iterating over local files extracted for ease of os-dependant patching
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diff changeset
317 // The question is whether original Hg treats this case (same content, different parents and hence nodeids) as 'modified' or 'clean'
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318 }
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319
157
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diff changeset
320 private boolean areTheSame(File f, HgDataFile dataFile, int localRevision) {
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321 // XXX consider adding HgDataDile.compare(File/byte[]/whatever) operation to optimize comparison
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diff changeset
322 ByteArrayChannel bac = new ByteArrayChannel();
d5268ca7715b Merged branch wrap-data-access into default for resource-friendly data access. Updated API to promote that friendliness to clients (channels, not byte[]). More exceptions
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diff changeset
323 boolean ioFailed = false;
d5268ca7715b Merged branch wrap-data-access into default for resource-friendly data access. Updated API to promote that friendliness to clients (channels, not byte[]). More exceptions
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diff changeset
324 try {
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325 // need content with metadata striped off - although theoretically chances are metadata may be different,
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326 // WC doesn't have it anyway
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327 dataFile.content(localRevision, bac);
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328 } catch (CancelledException ex) {
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329 // silently ignore - can't happen, ByteArrayChannel is not cancellable
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330 } catch (IOException ex) {
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331 ioFailed = true;
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332 } catch (HgException ex) {
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333 ioFailed = true;
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334 }
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335 return !ioFailed && areTheSame(f, bac.toArray(), dataFile.getPath());
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336 }
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337
117
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338 private boolean areTheSame(File f, final byte[] data, Path p) {
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339 FileInputStream fis = null;
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340 try {
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341 try {
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342 fis = new FileInputStream(f);
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343 FileChannel fc = fis.getChannel();
226
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344 ByteBuffer fb = ByteBuffer.allocate(min(1 + data.length * 2 /*to fit couple of lines appended; never zero*/, 8192));
219
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345 class Check implements ByteChannel {
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346 final boolean debug = false; // XXX may want to add global variable to allow clients to turn
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347 boolean sameSoFar = true;
117
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348 int x = 0;
219
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349
148
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350 public int write(ByteBuffer buffer) {
117
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351 for (int i = buffer.remaining(); i > 0; i--, x++) {
219
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352 if (x >= data.length /*file has been appended*/ || data[x] != buffer.get()) {
120
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353 if (debug) {
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354 byte[] xx = new byte[15];
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355 if (buffer.position() > 5) {
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356 buffer.position(buffer.position() - 5);
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357 }
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358 buffer.get(xx);
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359 System.out.print("expected >>" + new String(data, max(0, x - 4), 20) + "<< but got >>");
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360 System.out.println(new String(xx) + "<<");
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361 }
219
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362 sameSoFar = false;
117
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363 break;
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364 }
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365 }
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366 buffer.position(buffer.limit()); // mark as read
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367 return buffer.limit();
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368 }
219
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369
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370 public boolean sameSoFar() {
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371 return sameSoFar;
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372 }
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373 public boolean ultimatelyTheSame() {
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374 return sameSoFar && x == data.length;
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375 }
117
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376 };
219
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377 Check check = new Check();
117
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378 FilterByteChannel filters = new FilterByteChannel(check, repo.getFiltersFromWorkingDirToRepo(p));
219
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379 while (fc.read(fb) != -1 && check.sameSoFar()) {
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380 fb.flip();
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381 filters.write(fb);
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382 fb.compact();
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383 }
219
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384 return check.ultimatelyTheSame();
117
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385 } catch (IOException ex) {
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386 if (fis != null) {
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387 fis.close();
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388 }
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389 ex.printStackTrace(); // log warn
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390 }
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391 } catch (/*TODO typed*/Exception ex) {
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392 ex.printStackTrace();
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393 }
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394 return false;
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395 }
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396
141
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397 private static String todoGenerateFlags(Path fname) {
58
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398 // FIXME implement
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399 return null;
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400 }
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401
226
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402 @Experimental(reason="There's intention to support status query with multiple files/dirs, API might get changed")
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403 public static HgWorkingCopyStatusCollector create(HgRepository hgRepo, Path file) {
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404 FileIterator fi = file.isDirectory() ? new DirFileIterator(hgRepo, file) : new FileListIterator(hgRepo.getRepositoryRoot().getParentFile(), file);
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405 return new HgWorkingCopyStatusCollector(hgRepo, fi);
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406 }
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407
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408 private static class FileListIterator implements FileIterator {
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409 private final File dir;
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410 private final Path[] paths;
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411 private int index;
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412 private File nextFile; // cache file() in case it's called more than once
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413
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414 public FileListIterator(File startDir, Path... files) {
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415 dir = startDir;
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416 paths = files;
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417 reset();
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418 }
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419
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420 public void reset() {
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421 index = -1;
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422 nextFile = null;
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423 }
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424
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425 public boolean hasNext() {
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426 return paths.length > 0 && index < paths.length-1;
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427 }
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428
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429 public void next() {
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430 index++;
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431 if (index == paths.length) {
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432 throw new NoSuchElementException();
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433 }
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434 nextFile = new File(dir, paths[index].toString());
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435 }
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436
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437 public Path name() {
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438 return paths[index];
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diff changeset
439 }
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440
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441 public File file() {
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442 return nextFile;
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443 }
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444
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445 public boolean inScope(Path file) {
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446 for (int i = 0; i < paths.length; i++) {
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447 if (paths[i].equals(file)) {
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448 return true;
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449 }
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450 }
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451 return false;
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452 }
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453 }
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454
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455 private static class DirFileIterator implements FileIterator {
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456 private final Path dirOfInterest;
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457 private final FileWalker walker;
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458
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459 public DirFileIterator(HgRepository hgRepo, Path directory) {
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460 dirOfInterest = directory;
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461 File dir = hgRepo.getRepositoryRoot().getParentFile();
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462 Path.Source pathSrc = new Path.SimpleSource(new PathRewrite.Composite(new RelativePathRewrite(dir), hgRepo.getToRepoPathHelper()));
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463 walker = new FileWalker(new File(dir, directory.toString()), pathSrc);
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464 }
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465
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466 public void reset() {
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467 walker.reset();
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468 }
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469
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470 public boolean hasNext() {
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471 return walker.hasNext();
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472 }
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473
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474 public void next() {
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475 walker.next();
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476 }
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477
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478 public Path name() {
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479 return walker.name();
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480 }
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481
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482 public File file() {
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483 return walker.file();
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484 }
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485
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486 public boolean inScope(Path file) {
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487 return file.toString().startsWith(dirOfInterest.toString());
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488 }
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489 }
58
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490 }