Mercurial > hg4j

annotate src/org/tmatesoft/hg/core/HgChangeset.java @ 424:6437d261048a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Deprecated code removed
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 28 Mar 2012 15:42:15 +0200
parents 9c9c442b5f2e
children 31a89587eb04
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 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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19 import java.util.ArrayList;
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20 import java.util.Collections;
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21 import java.util.List;
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22 import java.util.Map;
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23
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24 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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25 import org.tmatesoft.hg.repo.HgChangelog;
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26 import org.tmatesoft.hg.repo.HgInvalidStateException;
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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.repo.HgStatusCollector;
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31 import org.tmatesoft.hg.util.CancelledException;
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32 import org.tmatesoft.hg.util.Path;
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35 /**
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36 * Record in the Mercurial changelog, describing single commit.
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37 *
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38 * Not thread-safe, don't try to read from different threads
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39 *
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40 * @author Artem Tikhomirov
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41 * @author TMate Software Ltd.
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42 */
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43 public class HgChangeset implements Cloneable {
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44 private final HgStatusCollector statusHelper;
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45 private final Path.Source pathHelper;
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46
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47 private HgChangelog.ParentWalker parentHelper;
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48
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49 //
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50 private RawChangeset changeset;
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51 private Nodeid nodeid;
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53 //
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54 private List<HgFileRevision> modifiedFiles, addedFiles;
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55 private List<Path> deletedFiles;
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56 private int revNumber;
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57 private byte[] parent1, parent2;
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59 // XXX consider CommandContext with StatusCollector, PathPool etc. Commands optionally get CC through a cons or create new
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60 // and pass it around
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61 /*package-local*/HgChangeset(HgStatusCollector statusCollector, Path.Source pathFactory) {
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62 statusHelper = statusCollector;
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63 pathHelper = pathFactory;
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64 }
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66 /*package-local*/ void init(int localRevNumber, Nodeid nid, RawChangeset rawChangeset) {
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67 revNumber = localRevNumber;
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68 nodeid = nid;
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69 changeset = rawChangeset.clone();
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70 modifiedFiles = addedFiles = null;
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71 deletedFiles = null;
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72 parent1 = parent2 = null;
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73 // keep references to parentHelper, statusHelper and pathHelper
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74 }
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76 /*package-local*/ void setParentHelper(HgChangelog.ParentWalker pw) {
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77 parentHelper = pw;
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78 if (parentHelper != null) {
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79 if (parentHelper.getRepo() != statusHelper.getRepo()) {
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80 throw new IllegalArgumentException();
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81 }
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82 }
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83 }
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85 /**
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86 * Index of the changeset in local repository. Note, this number is relevant only for local repositories/operations, use
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87 * {@link Nodeid nodeid} to uniquely identify a revision.
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88 *
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89 * @return index of the changeset revision
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90 */
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91 public int getRevisionIndex() {
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92 return revNumber;
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93 }
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94
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95 /**
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96 * Unique identity of this changeset revision
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97 * @return revision identifier, never <code>null</code>
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98 */
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99 public Nodeid getNodeid() {
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100 return nodeid;
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101 }
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102
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103 /**
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104 * Name of the user who made this commit
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105 * @return author of the commit, never <code>null</code>
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106 */
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107 public String getUser() {
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108 return changeset.user();
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109 }
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110
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111 /**
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112 * Commit description
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113 * @return content of the corresponding field in changeset record; empty string if none specified.
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114 */
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115 public String getComment() {
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116 return changeset.comment();
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117 }
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118
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119 /**
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120 * Name of the branch this commit was made in. Returns "default" for main branch.
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121 * @return name of the branch, non-empty string
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122 */
64
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123 public String getBranch() {
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124 return changeset.branch();
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125 }
211
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126
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127 /**
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128 * @return used to be String, now {@link HgDate}, use {@link HgDate#toString()} to get same result as before
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129 */
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130 public HgDate getDate() {
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131 return new HgDate(changeset.date().getTime(), changeset.timezone());
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132 }
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133
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134 /**
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135 * Indicates revision of manifest that tracks state of repository at the moment of this commit.
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136 * Note, may be {@link Nodeid#NULL} in certain scenarios (e.g. first changeset in an empty repository, usually by bogus tools)
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137 *
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138 * @return revision identifier, never <code>null</code>
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139 */
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140 public Nodeid getManifestRevision() {
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141 return changeset.manifest();
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142 }
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143
403
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144 /**
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145 * Lists names of files affected by this commit, as recorded in the changeset itself. Unlike {@link #getAddedFiles()},
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146 * {@link #getModifiedFiles()} and {@link #getRemovedFiles()}, this method doesn't analyze actual changes done
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147 * in the commit, rather extracts value from the changeset record.
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148 *
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149 * List returned by this method may be empty, while aforementioned methods may produce non-empty result.
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150 *
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151 * @return list of filenames, never <code>null</code>
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152 */
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153 public List<Path> getAffectedFiles() {
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154 // reports files as recorded in changelog. Note, merge revisions may have no
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155 // files listed, and thus this method would return empty list, while
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156 // #getModifiedFiles() would return list with merged file(s) (because it uses status to get 'em, not
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157 // what #files() gives).
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158 ArrayList<Path> rv = new ArrayList<Path>(changeset.files().size());
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159 for (String name : changeset.files()) {
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160 rv.add(pathHelper.path(name));
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161 }
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162 return rv;
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163 }
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164
403
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165 /**
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166 * Figures out files and specific revisions thereof that were modified in this commit
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167 *
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168 * @return revisions of files modified in this commit
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169 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
403
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170 */
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171 public List<HgFileRevision> getModifiedFiles() throws HgRuntimeException {
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172 if (modifiedFiles == null) {
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173 initFileChanges();
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174 }
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175 return modifiedFiles;
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176 }
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177
403
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178 /**
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179 * Figures out files added in this commit
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180 *
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181 * @return revisions of files added in this commit
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182 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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183 */
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184 public List<HgFileRevision> getAddedFiles() throws HgRuntimeException {
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185 if (addedFiles == null) {
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186 initFileChanges();
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187 }
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188 return addedFiles;
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189 }
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190
403
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191 /**
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192 * Figures out files that were deleted as part of this commit
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193 *
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194 * @return revisions of files deleted in this commit
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195 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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196 */
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197 public List<Path> getRemovedFiles() throws HgRuntimeException {
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198 if (deletedFiles == null) {
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199 initFileChanges();
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200 }
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201 return deletedFiles;
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202 }
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203
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204 public boolean isMerge() throws HgInvalidControlFileException {
195
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205 // p1 == -1 and p2 != -1 is legitimate case
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206 return !(getFirstParentRevision().isNull() || getSecondParentRevision().isNull());
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207 }
124
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208
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209 /**
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210 * @return never <code>null</code>
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211 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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212 */
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213 public Nodeid getFirstParentRevision() throws HgRuntimeException {
195
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214 if (parentHelper != null) {
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215 return parentHelper.safeFirstParent(nodeid);
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216 }
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217 // read once for both p1 and p2
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218 if (parent1 == null) {
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219 parent1 = new byte[20];
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220 parent2 = new byte[20];
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221 statusHelper.getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
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222 }
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223 return Nodeid.fromBinary(parent1, 0);
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224 }
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225
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226 /**
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227 * @return never <code>null</code>
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228 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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229 */
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230 public Nodeid getSecondParentRevision() throws HgRuntimeException {
195
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231 if (parentHelper != null) {
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232 return parentHelper.safeSecondParent(nodeid);
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233 }
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234 if (parent2 == null) {
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235 parent1 = new byte[20];
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236 parent2 = new byte[20];
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237 statusHelper.getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
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238 }
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239 return Nodeid.fromBinary(parent2, 0);
124
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240 }
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241
403
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242 /**
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243 * Create a copy of this changeset
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244 */
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245 @Override
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246 public HgChangeset clone() {
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247 try {
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248 HgChangeset copy = (HgChangeset) super.clone();
196
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249 // copy.changeset references this.changeset, doesn't need own copy
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250 return copy;
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251 } catch (CloneNotSupportedException ex) {
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252 throw new InternalError(ex.toString());
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253 }
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254 }
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255
423
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256 private /*synchronized*/ void initFileChanges() throws HgRuntimeException {
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257 ArrayList<Path> deleted = new ArrayList<Path>();
231
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258 ArrayList<HgFileRevision> modified = new ArrayList<HgFileRevision>();
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259 ArrayList<HgFileRevision> added = new ArrayList<HgFileRevision>();
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260 HgStatusCollector.Record r = new HgStatusCollector.Record();
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261 try {
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262 statusHelper.change(revNumber, r);
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263 } catch (CancelledException ex) {
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264 // Record can't cancel
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265 throw new HgInvalidStateException("Internal error");
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266 }
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267 final HgRepository repo = statusHelper.getRepo();
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268 for (Path s : r.getModified()) {
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269 Nodeid nid = r.nodeidAfterChange(s);
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270 if (nid == null) {
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271 throw new HgInvalidStateException(String.format("For the file %s recorded as modified in changeset %d couldn't find revision after change", s, revNumber));
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272 }
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273 modified.add(new HgFileRevision(repo, nid, null, s, null));
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274 }
316
ee6b467c1a5f Supply HGFileRevision with copy information when possible, calculate it otherwise
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275 final Map<Path, Path> copied = r.getCopied();
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276 for (Path s : r.getAdded()) {
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277 Nodeid nid = r.nodeidAfterChange(s);
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278 if (nid == null) {
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279 throw new HgInvalidStateException(String.format("For the file %s recorded as added in changeset %d couldn't find revision after change", s, revNumber));
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280 }
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281 added.add(new HgFileRevision(repo, nid, null, s, copied.get(s)));
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282 }
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283 for (Path s : r.getRemoved()) {
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284 // with Path from getRemoved, may just copy
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285 deleted.add(s);
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286 }
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287 modified.trimToSize();
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288 added.trimToSize();
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289 deleted.trimToSize();
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290 modifiedFiles = Collections.unmodifiableList(modified);
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291 addedFiles = Collections.unmodifiableList(added);
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292 deletedFiles = Collections.unmodifiableList(deleted);
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293 }
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294 }