Mercurial > jhg

annotate src/org/tmatesoft/hg/core/HgPullCommand.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 d2552e6a5af6
children 7743a9c10bfa
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.core;
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18
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19 import java.util.Collection;
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20 import java.util.Collections;
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21 import java.util.List;
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22
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23 import org.tmatesoft.hg.internal.AddRevInspector;
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24 import org.tmatesoft.hg.internal.COWTransaction;
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25 import org.tmatesoft.hg.internal.Internals;
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26 import org.tmatesoft.hg.internal.PhasesHelper;
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27 import org.tmatesoft.hg.internal.RepositoryComparator;
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28 import org.tmatesoft.hg.internal.RevisionSet;
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29 import org.tmatesoft.hg.internal.Transaction;
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30 import org.tmatesoft.hg.repo.HgBundle;
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31 import org.tmatesoft.hg.repo.HgChangelog;
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32 import org.tmatesoft.hg.repo.HgInternals;
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33 import org.tmatesoft.hg.repo.HgParentChildMap;
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34 import org.tmatesoft.hg.repo.HgRemoteRepository;
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35 import org.tmatesoft.hg.repo.HgRepository;
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36 import org.tmatesoft.hg.repo.HgRuntimeException;
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37 import org.tmatesoft.hg.util.CancelledException;
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38 import org.tmatesoft.hg.util.ProgressSupport;
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39
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40 /**
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41 * 'hg pull <remote>' counterpart, get remote changes to local repository
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42 *
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43 * @since 1.2
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44 * @author Artem Tikhomirov
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45 * @author TMate Software Ltd.
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46 */
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47 public class HgPullCommand extends HgAbstractCommand<HgPullCommand> {
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48
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49 private final HgRepository repo;
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50 private HgRemoteRepository remote;
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51 private RevisionSet added;
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52
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53 public HgPullCommand(HgRepository hgRepo) {
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54 repo = hgRepo;
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55 }
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56
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57 public HgPullCommand source(HgRemoteRepository hgRemote) {
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58 remote = hgRemote;
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59 return this;
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60 }
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61
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62 public void execute() throws HgRemoteConnectionException, HgIOException, HgLibraryFailureException, CancelledException {
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63 final ProgressSupport progress = getProgressSupport(null);
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64 try {
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65 progress.start(100);
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66 // TODO refactor same code in HgIncomingCommand #getComparator and #getParentHelper
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67 final HgChangelog clog = repo.getChangelog();
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68 final HgParentChildMap<HgChangelog> parentHelper = new HgParentChildMap<HgChangelog>(clog);
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69 parentHelper.init();
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70 final RepositoryComparator comparator = new RepositoryComparator(parentHelper, remote);
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71 // get incoming revisions
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72 comparator.compare(new ProgressSupport.Sub(progress, 50), getCancelSupport(null, true));
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73 final List<Nodeid> common = comparator.getCommon();
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74 // get bundle with changes from remote
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75 HgBundle incoming = remote.getChanges(common);
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76 //
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77 // add revisions to changelog, manifest, files
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78 final Internals implRepo = HgInternals.getImplementationRepo(repo);
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79 final AddRevInspector insp;
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80 Transaction.Factory trFactory = new COWTransaction.Factory();
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81 Transaction tr = trFactory.create(repo);
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82 try {
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83 incoming.inspectAll(insp = new AddRevInspector(implRepo, tr));
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84 insp.done();
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85 tr.commit();
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86 } catch (HgRuntimeException ex) {
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87 tr.rollback();
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88 throw ex;
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89 } catch (HgIOException ex) {
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90 tr.rollback();
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91 throw ex;
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92 } catch (RuntimeException ex) {
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93 tr.rollback();
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94 throw ex;
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95 }
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96 progress.worked(45);
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97 added = insp.addedChangesets();
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98
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99 if (!added.isEmpty()) {
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100 parentHelper.init(); // refresh the map, we use it for phases below
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101 }
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102 // get remote phases, update local phases to match that of remote
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103 // do not update any remote phase (it's pull, after all)
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104 final PhasesHelper phaseHelper = new PhasesHelper(implRepo, parentHelper);
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105 if (phaseHelper.isCapableOfPhases()) {
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106 RevisionSet rsCommon = new RevisionSet(common);
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107 HgRemoteRepository.Phases remotePhases = remote.getPhases();
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108 phaseHelper.synchronizeWithRemote(remotePhases, rsCommon.union(added));
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109 }
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110 progress.worked(5);
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111 incoming.unlink(); // keep the file only in case of failure
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112 } catch (HgRuntimeException ex) {
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113 throw new HgLibraryFailureException(ex);
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114 } finally {
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115 progress.done();
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116 }
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117 }
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118
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119 public Collection<Nodeid> getPulledRevisions() {
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120 return added == null ? Collections.<Nodeid>emptyList() : added.asList();
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121 }
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122 }