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annotate src/org/tmatesoft/hg/core/HgRevertCommand.java @ 526:2f9ed6bcefa2

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Initial support for Revert command with accompanying minor refactoring
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Jan 2013 17:07:19 +0100
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children 78a9e26e670d
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526
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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.io.File;
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20 import java.util.Arrays;
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21 import java.util.LinkedHashSet;
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22 import java.util.Set;
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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.DirstateReader;
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26 import org.tmatesoft.hg.internal.Experimental;
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27 import org.tmatesoft.hg.internal.Internals;
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28 import org.tmatesoft.hg.repo.HgInvalidRevisionException;
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29 import org.tmatesoft.hg.repo.HgManifest;
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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 import org.tmatesoft.hg.repo.HgManifest.Flags;
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33 import org.tmatesoft.hg.util.CancelledException;
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34 import org.tmatesoft.hg.util.Path;
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35
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36 /**
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37 * WORK IN PROGRESS.
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38 *
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39 * Restore files to their checkout state, 'hg revert' counterpart.
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40 *
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41 * @author Artem Tikhomirov
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42 * @author TMate Software Ltd.
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43 */
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44 @Experimental(reason="Work in progress")
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45 public class HgRevertCommand extends HgAbstractCommand<HgRevertCommand> {
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46
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47 private final HgRepository repo;
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48 private final Set<Path> files = new LinkedHashSet<Path>();
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49 private int changesetToCheckout = HgRepository.WORKING_COPY; // XXX WORKING_COPY_PARENT, in fact
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50 private boolean keepOriginal = true;
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51
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52 public HgRevertCommand(HgRepository hgRepo) {
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53 repo = hgRepo;
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54 }
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55
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56 /**
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57 * Additive
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58 *
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59 * @param paths files to revert
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60 * @return <code>this</code> for convenience
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61 */
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62 public HgRevertCommand file(Path... paths) {
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63 files.addAll(Arrays.asList(paths));
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64 return this;
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65 }
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66
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67 /**
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68 * Revert the given files to their states as of a specific revision
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69 *
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70 * @param changesetRevIndex
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71 * @return <code>this</code> for convenience
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72 * @throws HgBadArgumentException
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73 */
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74 public HgRevertCommand changeset(int changesetRevIndex) throws HgBadArgumentException {
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75 int lastCsetIndex = repo.getChangelog().getLastRevision();
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76 if (changesetRevIndex < 0 || changesetRevIndex > lastCsetIndex) {
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77 throw new HgBadArgumentException(String.format("Bad revision index %d, value from [0..%d] expected", changesetRevIndex, lastCsetIndex), null).setRevisionIndex(changesetRevIndex);
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78 }
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79 changesetToCheckout = changesetRevIndex;
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80 return this;
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81 }
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82
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83 /**
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84 * Handy supplement to {@link #changeset(int)}
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85 *
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86 * @param revision
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87 * @return <code>this</code> for convenience
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88 * @throws HgBadArgumentException
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89 */
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90 public HgRevertCommand changeset(Nodeid revision) throws HgBadArgumentException {
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91 try {
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92 return changeset(repo.getChangelog().getRevisionIndex(revision));
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93 } catch (HgInvalidRevisionException ex) {
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94 throw new HgBadArgumentException("Can't find revision", ex).setRevision(revision);
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95 }
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96 }
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97
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98 // TODO keepOriginal() to save .orig
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99
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100 /**
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101 * Perform the back out for the given files
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102 *
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103 * @throws HgIOException
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104 * @throws HgException
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105 * @throws CancelledException
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106 */
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107 public void execute() throws HgException, CancelledException {
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108 try {
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109 final int csetRevision;
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110 if (changesetToCheckout == HgRepository.WORKING_COPY) {
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111 csetRevision = repo.getChangelog().getRevisionIndex(repo.getWorkingCopyParents().first());
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112 } else {
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113 csetRevision = changesetToCheckout;
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114 }
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115 Internals implRepo = Internals.getInstance(repo);
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116 final DirstateBuilder dirstateBuilder = new DirstateBuilder(implRepo);
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117 dirstateBuilder.fillFrom(new DirstateReader(implRepo, new Path.SimpleSource()));
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118 final HgCheckoutCommand.CheckoutWorker worker = new HgCheckoutCommand.CheckoutWorker(implRepo);
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119
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120 HgManifest.Inspector insp = new HgManifest.Inspector() {
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121
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122 public boolean next(Nodeid nid, Path fname, Flags flags) {
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123 if (worker.next(nid, fname, flags)) {
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124 dirstateBuilder.recordUncertain(fname);
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125 return true;
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126 }
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127 return false;
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128 }
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129
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130 public boolean end(int manifestRevision) {
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131 return false;
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132 }
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133
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134 public boolean begin(int mainfestRevision, Nodeid nid, int changelogRevision) {
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135 return true;
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136 }
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137 };
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138
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139 for (Path file : files) {
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140 File f = new File(repo.getWorkingDir(), file.toString());
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141 if (f.isFile()) {
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142 if (keepOriginal) {
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143 File copy = new File(f.getParentFile(), f.getName() + ".orig");
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144 if (copy.exists()) {
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145 copy.delete();
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146 }
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147 f.renameTo(copy);
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148 } else {
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149 f.delete();
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150 }
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151 }
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152 repo.getManifest().walkFileRevisions(file, insp, csetRevision);
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153 worker.checkFailed();
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154 }
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155 dirstateBuilder.serialize();
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156 } catch (HgRuntimeException ex) {
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157 throw new HgLibraryFailureException(ex);
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158 }
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159 }
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160 }