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annotate src/org/tmatesoft/hg/internal/AddRevInspector.java @ 680:58a6900f845d

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Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sun, 21 Jul 2013 17:15:34 +0200
parents ae2d439fbed3
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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 java.util.HashMap;
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20 import java.util.Set;
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21
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22 import org.tmatesoft.hg.core.HgIOException;
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23 import org.tmatesoft.hg.core.Nodeid;
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24 import org.tmatesoft.hg.repo.HgBundle;
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25 import org.tmatesoft.hg.repo.HgBundle.GroupElement;
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26 import org.tmatesoft.hg.repo.HgDataFile;
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27 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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28 import org.tmatesoft.hg.repo.HgRepository;
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29 import org.tmatesoft.hg.repo.HgRuntimeException;
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30 import org.tmatesoft.hg.util.Pair;
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31
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32 /**
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33 * FIXME pretty much alike HgCloneCommand.WriteDownMate, shall converge
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34 *
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35 * @author Artem Tikhomirov
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36 * @author TMate Software Ltd.
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37 */
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38 public final class AddRevInspector implements HgBundle.Inspector {
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39 private final Internals repo;
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40 private final Transaction tr;
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41 private final FNCacheFile.Mediator fncache;
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42 private Set<Nodeid> added;
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43 private RevlogStreamWriter revlog;
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44 private RevMap clogRevs;
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45 private RevMap revlogRevs;
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46 private HgDataFile fileNode;
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47 private boolean newFile = false;
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48
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49 public AddRevInspector(Internals implRepo, Transaction transaction) {
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50 repo = implRepo;
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51 tr = transaction;
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52 fncache = new FNCacheFile.Mediator(implRepo, transaction);
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53 }
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54
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55 public void changelogStart() throws HgRuntimeException {
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56 RevlogStream rs = repo.getImplAccess().getChangelogStream();
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57 revlog = new RevlogStreamWriter(repo, rs, tr);
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58 revlogRevs = clogRevs = new RevMap(rs);
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59 }
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60
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61 public void changelogEnd() throws HgRuntimeException {
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62 revlog = null;
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63 revlogRevs = null;
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64 added = clogRevs.added();
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65 }
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66
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67 public void manifestStart() throws HgRuntimeException {
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68 RevlogStream rs = repo.getImplAccess().getManifestStream();
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69 revlog = new RevlogStreamWriter(repo, rs, tr);
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70 revlogRevs = new RevMap(rs);
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71 }
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72
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73 public void manifestEnd() throws HgRuntimeException {
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74 revlog = null;
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75 revlogRevs = null;
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76 }
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77
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78 public void fileStart(String name) throws HgRuntimeException {
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79 fileNode = repo.getRepo().getFileNode(name);
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80 newFile = !fileNode.exists();
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81 RevlogStream rs = repo.getImplAccess().getStream(fileNode);
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82 revlog = new RevlogStreamWriter(repo, rs, tr);
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83 revlogRevs = new RevMap(rs);
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84 }
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85
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86 public void fileEnd(String name) throws HgRuntimeException {
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87 if (newFile) {
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88 fncache.registerNew(fileNode.getPath(), revlog.getRevlogStream());
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89 }
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90 revlog = null;
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91 revlogRevs = null;
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92 }
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93
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94 public boolean element(GroupElement ge) throws HgRuntimeException {
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95 assert clogRevs != null;
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96 assert revlogRevs != null;
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97 if (revlog.getRevlogStream().findRevisionIndex(ge.node()) != HgRepository.BAD_REVISION) {
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98 // HgRemoteRepository.getChanges(common) builds a bundle that includes these common
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99 // revisions. Hence, shall not add these common (i.e. known locally) revisions
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100 // once again
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101 return true;
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102 }
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103 try {
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104 Pair<Integer, Nodeid> newRev = revlog.addPatchRevision(ge, clogRevs, revlogRevs);
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105 revlogRevs.update(newRev.first(), newRev.second());
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106 return true;
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107 } catch (HgIOException ex) {
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108 throw new HgInvalidControlFileException(ex, true);
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109 }
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110 }
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111
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112 public RevisionSet addedChangesets() {
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113 return new RevisionSet(added);
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114 }
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115
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116 public void done() throws HgIOException {
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117 fncache.complete();
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118 }
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119
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120 private static class RevMap implements RevlogStreamWriter.RevisionToIndexMap {
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121
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122 private final RevlogStream revlog;
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123 private HashMap<Nodeid, Integer> added = new HashMap<Nodeid, Integer>();
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124
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125 public RevMap(RevlogStream revlogStream) {
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126 revlog = revlogStream;
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127 }
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128
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129 public int revisionIndex(Nodeid revision) {
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130 Integer a = added.get(revision);
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131 if (a != null) {
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132 return a;
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133 }
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134 int f = revlog.findRevisionIndex(revision);
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135 return f == HgRepository.BAD_REVISION ? HgRepository.NO_REVISION : f;
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136 }
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137
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138 public void update(Integer revIndex, Nodeid rev) {
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139 added.put(rev, revIndex);
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140 }
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141
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142 Set<Nodeid> added() {
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143 return added.keySet();
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144 }
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145 }
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146 }