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annotate src/org/tmatesoft/hg/repo/ext/Rebase.java @ 628:6526d8adbc0f

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Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 22 May 2013 15:52:31 +0200
parents d2f6ab541330
children
rev   line source
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1 /*
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2 * Copyright (c) 2012-2013 TMate Software Ltd
501
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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.ext;
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18
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19 import java.io.File;
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20 import java.util.ArrayList;
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21 import java.util.HashMap;
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22 import java.util.Iterator;
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23 import java.util.Map;
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24 import java.util.NoSuchElementException;
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25
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26 import org.tmatesoft.hg.core.HgBadNodeidFormatException;
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27 import org.tmatesoft.hg.core.HgIOException;
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28 import org.tmatesoft.hg.core.Nodeid;
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29 import org.tmatesoft.hg.internal.Internals;
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30 import org.tmatesoft.hg.internal.LineReader;
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31 import org.tmatesoft.hg.repo.HgInvalidStateException;
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32
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33 /**
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34 * Support for standard Rebase extension.
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35 *
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36 * @see http://mercurial.selenic.com/wiki/RebaseExtension
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37 * @since 1.1
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38 * @author Artem Tikhomirov
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39 * @author TMate Software Ltd.
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40 */
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41 public class Rebase {
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42 private Internals repo;
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43 private Nodeid workingDirParent;
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44 private Nodeid destRevision;
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45 private Nodeid externalParent;
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46 private Map<Nodeid, Nodeid> state;
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47 private boolean collapse;
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48 private boolean keepOriginalRevisions;
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49 private boolean keepBranchNames;
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50
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51 /*package-local*/ Rebase(Internals internalRepo) {
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52 repo = internalRepo;
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53 }
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54
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55 public Rebase refresh() throws HgIOException {
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56 workingDirParent = null;
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57 destRevision = null;
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58 externalParent = null;
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59 state = null;
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60 File f = repo.getFileFromRepoDir("rebasestate");
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61 if (!f.exists()) {
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62 return this;
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63 }
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64 state = new HashMap<Nodeid, Nodeid>();
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65 try {
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66 LineReader lr = new LineReader(f, repo.getSessionContext().getLog());
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67 ArrayList<String> contents = new ArrayList<String>();
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68 lr.read(new LineReader.SimpleLineCollector(), contents);
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69 Iterator<String> it = contents.iterator();
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70 workingDirParent = Nodeid.fromAscii(it.next());
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71 destRevision = Nodeid.fromAscii(it.next());
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72 externalParent = Nodeid.fromAscii(it.next());
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73 collapse = "1".equals(it.next());
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74 keepOriginalRevisions = "1".equals(it.next());
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75 keepBranchNames = "1".equals(it.next());
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76 final String nullmerge = "-2";
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77 while (it.hasNext()) {
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78 String line = it.next();
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79 int x = line.indexOf(':');
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80 if (x == -1) {
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81 throw new HgInvalidStateException(line);
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82 }
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83 Nodeid oldRev = Nodeid.fromAscii(line.substring(0, x));
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84 Nodeid newRev;
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85 if (line.regionMatches(x+1, nullmerge, 0, nullmerge.length())) {
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86 newRev = null;
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87 } else {
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88 newRev = Nodeid.fromAscii(line.substring(x+1));
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89 }
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90 state.put(oldRev, newRev);
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91 }
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92 } catch (NoSuchElementException ex) {
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93 throw new HgIOException("Bad format of rebase state file", f);
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94 } catch (HgBadNodeidFormatException ex) {
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95 throw new HgIOException("Bad format of rebase state file", ex, f);
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96 }
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97 return this;
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98 }
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99
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100 /**
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101 * Tells whether rebase process was interrupted to manually resolve a merge
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102 * and can be resumed or aborted.
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103 *
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104 * @return <code>true</code> when rebase is in progress
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105 */
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106 public boolean isRebaseInProgress() {
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107 return state != null;
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108 }
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109
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110 public Nodeid getWorkingDirParent() {
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111 assert isRebaseInProgress();
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112 return workingDirParent;
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113 }
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114
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115 public Nodeid getTarget() {
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116 assert isRebaseInProgress();
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117 return destRevision;
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118 }
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119
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120 public Nodeid getExternalParent() {
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121 assert isRebaseInProgress();
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122 assert collapse;
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123 return externalParent;
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124 }
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125
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126 public boolean isCollapse() {
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127 return collapse;
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128 }
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129
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130 public boolean isKeepOriginalRevisions() {
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131 return keepOriginalRevisions;
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132 }
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133
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134 public boolean isKeepBranchNames() {
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135 return keepBranchNames;
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136 }
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137 }