Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgMergeState.java @ 233:1d389c0cb0a5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Optimize file history walk not to iterat over whole changelog for sparse and distant revisions
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 03 Jun 2011 04:50:09 +0200
parents 1792b37650f2
children 3fbfce107f94
rev   line source
231
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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 java.io.BufferedReader;
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20 import java.io.File;
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21 import java.io.FileReader;
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22 import java.io.IOException;
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23 import java.util.ArrayList;
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24 import java.util.Arrays;
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25 import java.util.Collections;
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26 import java.util.List;
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27
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28 import org.tmatesoft.hg.core.HgBadStateException;
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29 import org.tmatesoft.hg.core.HgFileRevision;
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30 import org.tmatesoft.hg.core.HgLogCommand.FileRevision;
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31 import org.tmatesoft.hg.core.Nodeid;
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32 import org.tmatesoft.hg.internal.Pool;
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33 import org.tmatesoft.hg.repo.HgStatusCollector.ManifestRevisionInspector;
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34 import org.tmatesoft.hg.util.Path;
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35 import org.tmatesoft.hg.util.PathPool;
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36 import org.tmatesoft.hg.util.PathRewrite;
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37
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38 /**
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39 *
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40 * @author Artem Tikhomirov
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41 * @author TMate Software Ltd.
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42 */
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43 public class HgMergeState {
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44 private Nodeid wcp1, wcp2;
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45
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46 public enum Kind {
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47 Resolved, Unresolved;
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48 }
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49
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50 public static class Entry {
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51 private final Kind state;
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52 private final HgFileRevision parent1;
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53 private final HgFileRevision parent2;
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54 private final HgFileRevision ancestor;
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55 private final Path wcFile;
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56
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57 /*package-local*/Entry(Kind s, Path actualCopy, HgFileRevision p1, HgFileRevision p2, HgFileRevision ca) {
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58 if (p1 == null || p2 == null || ca == null || actualCopy == null) {
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59 throw new IllegalArgumentException();
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60 }
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61 state = s;
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62 wcFile = actualCopy;
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63 parent1 = p1;
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64 parent2 = p2;
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65 ancestor = ca;
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66 }
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67
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68 public Kind getState() {
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69 return state;
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70 }
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71 public Path getActualFile() {
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72 return wcFile;
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73 }
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74 public HgFileRevision getFirstParent() {
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75 return parent1;
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76 }
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77 public HgFileRevision getSecondParent() {
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78 return parent2;
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79 }
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80 public HgFileRevision getCommonAncestor() {
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81 return ancestor;
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82 }
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83 }
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84
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85 private final HgRepository repo;
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86 private Entry[] entries;
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87
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88 HgMergeState(HgRepository hgRepo) {
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89 repo = hgRepo;
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90 }
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91
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92 public void refresh() throws IOException/*XXX it's unlikely caller can do anything reasonable about IOException */ {
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93 entries = null;
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94 final File f = new File(repo.getRepositoryRoot(), "merge/state");
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95 if (!f.canRead()) {
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96 // empty state
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97 return;
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98 }
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99 Nodeid[] wcParents = repo.loadDirstate().parents();
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100 wcp1 = wcParents[0]; wcp2 = wcParents[1];
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101 ArrayList<Entry> result = new ArrayList<Entry>();
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102 PathPool pathPool = new PathPool(new PathRewrite.Empty());
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103 Pool<Nodeid> nodeidPool = new Pool<Nodeid>();
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104 Pool<String> fnamePool = new Pool<String>();
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105 final ManifestRevisionInspector m1 = new ManifestRevisionInspector(nodeidPool, fnamePool);
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106 final ManifestRevisionInspector m2 = new ManifestRevisionInspector(nodeidPool, fnamePool);
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107 final int rp1 = repo.getChangelog().getLocalRevision(wcp1);
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108 final int rp2 = repo.getChangelog().getLocalRevision(wcp2);
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109 repo.getManifest().walk(rp1, rp1, m1);
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110 repo.getManifest().walk(rp2, rp2, m2);
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111 BufferedReader br = new BufferedReader(new FileReader(f));
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112 String s = br.readLine();
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113 Nodeid n = Nodeid.fromAscii(s);
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114 if (!wcp1.equals(n)) {
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115 throw new AssertionError("I assume merge/state records revision of the wc we merge into");
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116 }
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117 while ((s = br.readLine()) != null) {
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118 String[] r = s.split("\\00");
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119 HgFileRevision p1 = new HgFileRevision(repo, m1.nodeid(r[3]), pathPool.path(r[3]));
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120 HgFileRevision ca = new HgFileRevision(repo, Nodeid.fromAscii(r[5]), pathPool.path(r[4]));
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121 HgFileRevision p2 = new HgFileRevision(repo, m2.nodeid(r[6]), pathPool.path(r[6]));
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122 final Kind k;
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123 if ("u".equals(r[1])) {
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124 k = Kind.Unresolved;
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125 } else if ("r".equals(r[1])) {
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126 k = Kind.Resolved;
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127 } else {
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128 throw new HgBadStateException(r[1]);
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129 }
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130 Entry e = new Entry(k, pathPool.path(r[0]), p1, p2, ca);
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131 result.add(e);
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132 }
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133 entries = result.toArray(new Entry[result.size()]);
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134 br.close();
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135 pathPool.clear();
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136 }
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137
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138 public Nodeid getFirstParent() {
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139 if (wcp1 == null) {
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140 throw new HgBadStateException("Call #refresh() first");
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141 }
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142 return wcp1;
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143 }
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144
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145 public Nodeid getSecondParent() {
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146 if (wcp2 == null) {
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147 throw new HgBadStateException("Call #refresh() first");
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148 }
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149 return wcp2;
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150 }
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151
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152 public List<Entry> getConflicts() {
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153 return entries == null ? Collections.<Entry>emptyList() : Arrays.asList(entries);
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154 }
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155 }