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annotate src/org/tmatesoft/hg/core/HgCheckoutCommand.java @ 525:0be5be8d57e9

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Repository checkout support, first iteration
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 11 Jan 2013 18:12:39 +0100
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children 2f9ed6bcefa2
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525
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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1 /*
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2 * Copyright (c) 2012-2013 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
0be5be8d57e9 Repository checkout support, first iteration
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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.io.File;
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20 import java.io.FileOutputStream;
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21 import java.io.IOException;
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22 import java.nio.channels.FileChannel;
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23
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24 import org.tmatesoft.hg.internal.DirstateBuilder;
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25 import org.tmatesoft.hg.internal.Experimental;
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26 import org.tmatesoft.hg.internal.Internals;
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27 import org.tmatesoft.hg.internal.WorkingDirFileWriter;
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28 import org.tmatesoft.hg.repo.HgDataFile;
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29 import org.tmatesoft.hg.repo.HgInvalidRevisionException;
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30 import org.tmatesoft.hg.repo.HgInvalidStateException;
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31 import org.tmatesoft.hg.repo.HgManifest;
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32 import org.tmatesoft.hg.repo.HgRepository;
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33 import org.tmatesoft.hg.repo.HgRuntimeException;
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34 import org.tmatesoft.hg.repo.HgManifest.Flags;
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35 import org.tmatesoft.hg.util.CancelledException;
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36 import org.tmatesoft.hg.util.Path;
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37
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38 /**
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39 * WORK IN PROGRESS.
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40 *
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41 * Update working directory to specific state, 'hg checkout' counterpart.
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42 * For the time being, only 'clean' checkout is supported ('hg co --clean')
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43 *
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44 * @since 1.1
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45 * @author Artem Tikhomirov
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46 * @author TMate Software Ltd.
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47 */
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48 @Experimental(reason="Work in progress")
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49 public class HgCheckoutCommand extends HgAbstractCommand<HgCheckoutCommand>{
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50
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51 private final HgRepository repo;
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52 private int revisionToCheckout = HgRepository.BAD_REVISION;
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53
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54 public HgCheckoutCommand(HgRepository hgRepo) {
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55 repo = hgRepo;
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56 }
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57
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58 /**
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59 * Select revision to check out
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60 *
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61 * @param nodeid revision
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62 * @return <code>this</code> for convenience
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63 * @throws HgBadArgumentException if failed to find supplied changeset
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64 */
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65 public HgCheckoutCommand changeset(Nodeid nodeid) throws HgBadArgumentException {
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66 try {
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67 return changeset(repo.getChangelog().getRevisionIndex(nodeid));
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68 } catch (HgInvalidRevisionException ex) {
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69 throw new HgBadArgumentException("Can't find revision", ex).setRevision(nodeid);
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70 }
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71 }
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72
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73 /**
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74 * Select revision to check out using local revision index
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75 *
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76 * @param changesetIndex local revision index
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77 * @return <code>this</code> for convenience
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78 * @throws HgBadArgumentException if failed to find supplied changeset
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79 */
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80 public HgCheckoutCommand changeset(int changesetIndex) throws HgBadArgumentException {
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81 int lastCsetIndex = repo.getChangelog().getLastRevision();
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82 if (changesetIndex < 0 || changesetIndex > lastCsetIndex) {
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83 throw new HgBadArgumentException(String.format("Bad revision index %d, value from [0..%d] expected", changesetIndex, lastCsetIndex), null).setRevisionIndex(changesetIndex);
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84 }
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85 revisionToCheckout = changesetIndex;
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86 return this;
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87 }
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88
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89 /**
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90 *
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91 * @throws HgIOException to indicate troubles updating files in working copy
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92 * @throws HgException
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93 * @throws CancelledException
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94 */
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95 public void execute() throws HgException, CancelledException {
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96 Internals internalRepo = Internals.getInstance(repo);
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97 // remove tracked files from wd (perhaps, just forget 'Added'?)
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98 // TODO
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99 final DirstateBuilder dirstateBuilder = new DirstateBuilder(internalRepo.buildFileNameEncodingHelper());
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100 final Exception[] failure = new Exception[1];
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101 HgManifest.Inspector worker = new HgManifest.Inspector() {
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102
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103 public boolean next(Nodeid nid, Path fname, Flags flags) {
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104 try {
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105 HgDataFile df = repo.getFileNode(fname);
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106 int fileRevIndex = df.getRevisionIndex(nid);
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107 // check out files based on manifest
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108 // FIXME links!
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109 WorkingDirFileWriter workingDirWriter = new WorkingDirFileWriter(repo);
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110 workingDirWriter.processFile(df, fileRevIndex);
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111 // new dirstate based on manifest
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112 dirstateBuilder.recordNormal(fname, flags, workingDirWriter.bytesWritten());
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113 return true;
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114 } catch (IOException ex) {
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115 failure[0] = ex;
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116 } catch (HgRuntimeException ex) {
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117 failure[0] = ex;
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118 }
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119 return false;
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120 }
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121
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122 public boolean end(int manifestRevision) {
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123 return false;
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124 }
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125
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126 public boolean begin(int mainfestRevision, Nodeid nid, int changelogRevision) {
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127 return true;
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128 }
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129 };
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130 dirstateBuilder.parents(repo.getChangelog().getRevision(revisionToCheckout), null);
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131 repo.getManifest().walk(revisionToCheckout, revisionToCheckout, worker);
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132 if (failure[0] != null) {
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diff changeset
133 if (failure[0] instanceof IOException) {
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134 throw new HgIOException("Failed to write down file revision", failure[0], /*FIXME file*/null);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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135 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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136 if (failure[0] instanceof HgRuntimeException) {
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137 throw new HgLibraryFailureException((HgRuntimeException) failure[0]);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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138 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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139 HgInvalidStateException e = new HgInvalidStateException("Unexpected exception");
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140 e.initCause(failure[0]);
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141 throw e;
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142 }
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143 File dirstateFile = internalRepo.getFileFromRepoDir("dirstate");
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144 try {
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145 FileChannel dirstate = new FileOutputStream(dirstateFile).getChannel();
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146 dirstateBuilder.serialize(dirstate);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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147 dirstate.close();
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148 } catch (IOException ex) {
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149 throw new HgIOException("Can't write down new directory state", ex, dirstateFile);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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150 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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151 // FIXME write down branch file
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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152 }
0be5be8d57e9 Repository checkout support, first iteration
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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153 }