Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/FileRenameHistory.java @ 711:a62079bc422b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Keyword filtering that doesn't depend on input buffer size and the way input lines got split between filter() calls. KewordFilter got state to keep processed suspicious ...$ lines
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 11 Oct 2013 21:35:41 +0200
parents 7efabe0cddcf
children
rev   line source
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1 /*
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2 * Copyright (c) 2013 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.internal;
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18
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19 import static org.tmatesoft.hg.repo.HgRepository.BAD_REVISION;
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20
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21 import java.util.ArrayList;
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22 import java.util.Arrays;
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23 import java.util.Collections;
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24 import java.util.LinkedList;
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25 import java.util.List;
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26
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27 import org.tmatesoft.hg.core.HgFileRevision;
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28 import org.tmatesoft.hg.core.HgIterateDirection;
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29 import org.tmatesoft.hg.repo.HgDataFile;
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30 import org.tmatesoft.hg.repo.HgRepository;
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31 import org.tmatesoft.hg.repo.HgRuntimeException;
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32
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33 /**
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34 * Traces file renames. Quite similar to HgChangesetFileSneaker, although the latter tries different paths
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35 * to find origin names, while this class traces first renames found only.
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36 *
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37 * @author Artem Tikhomirov
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38 * @author TMate Software Ltd.
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39 */
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40 public final class FileRenameHistory {
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41
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42 private final int csetFrom;
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43 private final int csetTo;
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44 private final List<Chunk> history;
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45
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46 public FileRenameHistory(int csetStartIndex, int csetEndIndex) {
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47 csetFrom = csetStartIndex;
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48 csetTo = csetEndIndex;
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49 history = new ArrayList<Chunk>(3);
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50 }
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51
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52 public int startChangeset() {
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53 return csetFrom;
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54 }
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55
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56 public int endChangeset() {
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57 return csetTo;
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58 }
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59
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60 public boolean isOutOfRange(HgDataFile df, int fileRev) {
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61 return df.getChangesetRevisionIndex(fileRev) < csetFrom || df.getChangesetRevisionIndex(0) > csetTo;
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62 }
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63
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64 public void build(HgDataFile df, int fileRev) {
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65 assert !isOutOfRange(df, fileRev);
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66 LinkedList<Chunk> chunks = new LinkedList<Chunk>();
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67 int chunkStart = 0, chunkEnd = fileRev;
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68 int csetChunkEnd = -1, csetChunkStart = -1;
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69 BasicRevMap csetMap = new BasicRevMap(0, fileRev).collect(df);
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70 while (fileRev >= 0) {
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71 int cset = csetMap.changesetAt(fileRev);
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72 if (csetChunkEnd == -1) {
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73 csetChunkEnd = cset;
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74 }
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75 if (cset <= csetFrom) {
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76 chunkStart = fileRev;
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77 csetChunkStart = csetFrom;
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78 break;
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79 }
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80 if (cset > csetTo) {
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81 chunkEnd = --fileRev;
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82 csetChunkEnd = -1;
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83 continue;
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84 }
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85 csetChunkStart = cset;
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86 if (df.isCopy(fileRev)) {
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87 chunks.addFirst(new Chunk(df, fileRev, chunkEnd, csetChunkStart, csetChunkEnd));
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88 HgFileRevision origin = df.getCopySource(fileRev);
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89 df = df.getRepo().getFileNode(origin.getPath());
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90 fileRev = chunkEnd = df.getRevisionIndex(origin.getRevision());
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91 csetMap = new BasicRevMap(0, fileRev).collect(df);
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92 chunkStart = 0;
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93 csetChunkEnd = cset - 1; // if df is copy, cset can't be 0
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94 csetChunkStart = -1;
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95 } else {
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96 fileRev--;
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97 }
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98 }
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99 assert chunkStart >= 0;
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100 assert chunkEnd >= 0; // can be negative only if df.cset(0) > csetTo
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101 assert csetChunkEnd >= 0;
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102 assert csetChunkStart >= 0;
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103 chunks.addFirst(new Chunk(df, chunkStart, chunkEnd, csetChunkStart, csetChunkEnd));
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104
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105 history.clear();
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106 history.addAll(chunks);
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107 }
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108
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109 public Iterable<Chunk> iterate(HgIterateDirection order) {
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110 if (order == HgIterateDirection.NewToOld) {
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111 return ReverseIterator.reversed(history);
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112 }
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113 assert order == HgIterateDirection.OldToNew;
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114 return Collections.unmodifiableList(history);
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115 }
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116
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117 public int chunks() {
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118 return history.size();
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119 }
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120
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121 public Chunk chunkAt(int cset) {
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122 if (cset < csetFrom || cset > csetTo) {
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123 return null;
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124 }
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125 for (Chunk c : history) {
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126 if (c.firstCset() > cset) {
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127 break;
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128 }
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129 if (cset <= c.lastCset()) {
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130 return c;
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131 }
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132 }
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133 return null;
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134 }
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135
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136
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137 /**
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138 * file has changes [firstFileRev..lastFileRev] that have occurred somewhere in [firstCset..lastCset]
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139 */
694
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140 public static final class Chunk {
691
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141 private final HgDataFile df;
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142 private final int fileRevFrom;
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143 private final int fileRevTo;
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144 private final int csetFrom;
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145 private final int csetTo;
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146 Chunk(HgDataFile file, int fileRevStart, int fileRevEnd, int csetStart, int csetEnd) {
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147 df = file;
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148 fileRevFrom = fileRevStart;
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149 fileRevTo = fileRevEnd;
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150 csetFrom = csetStart;
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151 csetTo = csetEnd;
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152 }
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153 public HgDataFile file() {
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154 return df;
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155 }
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156 public int firstFileRev() {
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157 return fileRevFrom;
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158 }
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159 public int lastFileRev() {
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160 return fileRevTo;
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161 }
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162 public int firstCset() {
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163 return csetFrom;
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164 }
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165 public int lastCset() {
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166 return csetTo;
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167 }
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168 }
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169
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170 private static final class BasicRevMap implements HgDataFile.LinkRevisionInspector {
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171 private final int[] revs;
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172 private final int fromRev;
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173 private final int toRev;
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174 public BasicRevMap(int startRev, int endRev) {
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175 revs = new int[endRev+1]; // for simplicity, just ignore startRev now (it's 0 in local use anyway)
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176 fromRev = startRev;
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177 toRev = endRev;
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178 Arrays.fill(revs, BAD_REVISION);
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179 }
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180
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181 public BasicRevMap collect(HgDataFile df) {
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182 df.indexWalk(fromRev, toRev, this);
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183 return this;
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184 }
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185
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186 public void next(int revisionIndex, int linkedRevisionIndex) throws HgRuntimeException {
7efabe0cddcf Speed up (a) file rename history to minimize file reads; (b) file.isCopy(int) to read metadata for few revisions at once (use pattern assumes earlier revisions are likely to be queried, too); (c) HgIgnore.isIgnored by caching matched initial fragments (to substitute more expensive Matcher.matches with cheaper HashMap.contains)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 691
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187 revs[revisionIndex] = linkedRevisionIndex;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 691
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188 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 691
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189
7efabe0cddcf Speed up (a) file rename history to minimize file reads; (b) file.isCopy(int) to read metadata for few revisions at once (use pattern assumes earlier revisions are likely to be queried, too); (c) HgIgnore.isIgnored by caching matched initial fragments (to substitute more expensive Matcher.matches with cheaper HashMap.contains)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 691
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190 /**
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 691
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191 * @return {@link HgRepository#BAD_REVISION} if there's no mapping
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 691
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192 */
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 691
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193 public int changesetAt(int rev) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 691
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194 return revs[rev];
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 691
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195 }
7efabe0cddcf Speed up (a) file rename history to minimize file reads; (b) file.isCopy(int) to read metadata for few revisions at once (use pattern assumes earlier revisions are likely to be queried, too); (c) HgIgnore.isIgnored by caching matched initial fragments (to substitute more expensive Matcher.matches with cheaper HashMap.contains)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 691
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196 }
691
72fc7774b87e Fix file.isCopy() for blame/annotate. Refactor status and blame to use newly introduced FileHistory helper that builds file rename history
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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197 }