Mercurial > hg4j

annotate src/org/tmatesoft/hg/core/HgChangeset.java @ 422:5d1cc7366d04

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added tag v0.8.5 for changeset fdd7d756dea0. Point before major exceptions refactoring
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 23 Mar 2012 21:26:01 +0100
parents ee8264d80747
children 9c9c442b5f2e
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.HgRepository;
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27 import org.tmatesoft.hg.repo.HgStatusCollector;
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28 import org.tmatesoft.hg.util.Path;
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31 /**
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32 * Record in the Mercurial changelog, describing single commit.
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33 *
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34 * Not thread-safe, don't try to read from different threads
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35 *
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36 * @author Artem Tikhomirov
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37 * @author TMate Software Ltd.
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38 */
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39 public class HgChangeset implements Cloneable {
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40 private final HgStatusCollector statusHelper;
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41 private final Path.Source pathHelper;
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43 private HgChangelog.ParentWalker parentHelper;
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44
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45 //
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46 private RawChangeset changeset;
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47 private Nodeid nodeid;
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49 //
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50 private List<HgFileRevision> modifiedFiles, addedFiles;
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51 private List<Path> deletedFiles;
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52 private int revNumber;
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53 private byte[] parent1, parent2;
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55 // XXX consider CommandContext with StatusCollector, PathPool etc. Commands optionally get CC through a cons or create new
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56 // and pass it around
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57 /*package-local*/HgChangeset(HgStatusCollector statusCollector, Path.Source pathFactory) {
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58 statusHelper = statusCollector;
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59 pathHelper = pathFactory;
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60 }
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62 /*package-local*/ void init(int localRevNumber, Nodeid nid, RawChangeset rawChangeset) {
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63 revNumber = localRevNumber;
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64 nodeid = nid;
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65 changeset = rawChangeset.clone();
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66 modifiedFiles = addedFiles = null;
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67 deletedFiles = null;
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68 parent1 = parent2 = null;
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69 // keep references to parentHelper, statusHelper and pathHelper
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70 }
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72 /*package-local*/ void setParentHelper(HgChangelog.ParentWalker pw) {
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73 parentHelper = pw;
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74 if (parentHelper != null) {
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75 if (parentHelper.getRepo() != statusHelper.getRepo()) {
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76 throw new IllegalArgumentException();
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77 }
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78 }
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79 }
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81 /**
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82 * Index of the changeset in local repository. Note, this number is relevant only for local repositories/operations, use
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83 * {@link Nodeid nodeid} to uniquely identify a revision.
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84 *
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85 * @return index of the changeset revision
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86 */
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87 public int getRevisionIndex() {
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88 return revNumber;
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89 }
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90
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91 /**
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92 * @deprecated use {@link #getRevisionIndex()}
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93 */
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94 @Deprecated
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95 public int getRevision() {
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96 return revNumber;
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97 }
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99 /**
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100 * Unique identity of this changeset revision
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101 * @return revision identifier, never <code>null</code>
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102 */
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103 public Nodeid getNodeid() {
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104 return nodeid;
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105 }
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106
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107 /**
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108 * Name of the user who made this commit
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109 * @return author of the commit, never <code>null</code>
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110 */
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111 public String getUser() {
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112 return changeset.user();
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113 }
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114
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115 /**
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116 * Commit description
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117 * @return content of the corresponding field in changeset record; empty string if none specified.
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118 */
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119 public String getComment() {
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120 return changeset.comment();
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121 }
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122
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123 /**
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124 * Name of the branch this commit was made in. Returns "default" for main branch.
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125 * @return name of the branch, non-empty string
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126 */
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127 public String getBranch() {
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128 return changeset.branch();
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129 }
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130
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131 /**
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132 * @return used to be String, now {@link HgDate}, use {@link HgDate#toString()} to get same result as before
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133 */
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134 public HgDate getDate() {
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135 return new HgDate(changeset.date().getTime(), changeset.timezone());
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136 }
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137
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138 /**
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139 * Indicates revision of manifest that tracks state of repository at the moment of this commit.
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140 * 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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141 *
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142 * @return revision identifier, never <code>null</code>
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143 */
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144 public Nodeid getManifestRevision() {
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145 return changeset.manifest();
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146 }
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147
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148 /**
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149 * Lists names of files affected by this commit, as recorded in the changeset itself. Unlike {@link #getAddedFiles()},
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150 * {@link #getModifiedFiles()} and {@link #getRemovedFiles()}, this method doesn't analyze actual changes done
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151 * in the commit, rather extracts value from the changeset record.
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152 *
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153 * List returned by this method may be empty, while aforementioned methods may produce non-empty result.
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154 *
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155 * @return list of filenames, never <code>null</code>
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156 */
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157 public List<Path> getAffectedFiles() {
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158 // reports files as recorded in changelog. Note, merge revisions may have no
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159 // files listed, and thus this method would return empty list, while
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160 // #getModifiedFiles() would return list with merged file(s) (because it uses status to get 'em, not
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161 // what #files() gives).
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162 ArrayList<Path> rv = new ArrayList<Path>(changeset.files().size());
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163 for (String name : changeset.files()) {
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164 rv.add(pathHelper.path(name));
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165 }
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166 return rv;
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167 }
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168
403
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169 /**
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170 * Figures out files and specific revisions thereof that were modified in this commit
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171 *
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172 * @return revisions of files modified in this commit
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173 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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174 * @throws HgException in case of some other library issue
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175 */
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176 public List<HgFileRevision> getModifiedFiles() throws HgException {
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177 if (modifiedFiles == null) {
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178 initFileChanges();
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179 }
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180 return modifiedFiles;
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181 }
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182
403
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183 /**
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184 * Figures out files added in this commit
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185 *
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186 * @return revisions of files added in this commit
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187 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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188 * @throws HgException in case of some other library issue
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189 */
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190 public List<HgFileRevision> getAddedFiles() throws HgException {
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191 if (addedFiles == null) {
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192 initFileChanges();
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193 }
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194 return addedFiles;
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195 }
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196
403
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197 /**
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198 * Figures out files that were deleted as part of this commit
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199 *
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200 * @return revisions of files deleted in this commit
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201 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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202 * @throws HgException in case of some other library issue
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203 */
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204 public List<Path> getRemovedFiles() throws HgException {
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205 if (deletedFiles == null) {
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206 initFileChanges();
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207 }
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208 return deletedFiles;
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209 }
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210
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211 public boolean isMerge() throws HgInvalidControlFileException {
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212 // p1 == -1 and p2 != -1 is legitimate case
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213 return !(getFirstParentRevision().isNull() || getSecondParentRevision().isNull());
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214 }
124
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215
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216 /**
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217 * @return never <code>null</code>
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218 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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219 */
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220 public Nodeid getFirstParentRevision() throws HgInvalidControlFileException {
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221 if (parentHelper != null) {
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222 return parentHelper.safeFirstParent(nodeid);
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223 }
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224 // read once for both p1 and p2
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225 if (parent1 == null) {
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226 parent1 = new byte[20];
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227 parent2 = new byte[20];
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228 statusHelper.getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
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229 }
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230 return Nodeid.fromBinary(parent1, 0);
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231 }
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232
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233 /**
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234 * @return never <code>null</code>
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235 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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236 */
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237 public Nodeid getSecondParentRevision() throws HgInvalidControlFileException {
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238 if (parentHelper != null) {
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239 return parentHelper.safeSecondParent(nodeid);
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240 }
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241 if (parent2 == null) {
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242 parent1 = new byte[20];
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243 parent2 = new byte[20];
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244 statusHelper.getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
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245 }
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246 return Nodeid.fromBinary(parent2, 0);
124
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247 }
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248
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249 /**
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250 * Create a copy of this changeset
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251 */
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252 @Override
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253 public HgChangeset clone() {
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254 try {
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255 HgChangeset copy = (HgChangeset) super.clone();
196
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256 // copy.changeset references this.changeset, doesn't need own copy
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257 return copy;
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258 } catch (CloneNotSupportedException ex) {
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259 throw new InternalError(ex.toString());
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260 }
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261 }
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262
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263 private /*synchronized*/ void initFileChanges() throws HgException {
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264 ArrayList<Path> deleted = new ArrayList<Path>();
231
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265 ArrayList<HgFileRevision> modified = new ArrayList<HgFileRevision>();
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266 ArrayList<HgFileRevision> added = new ArrayList<HgFileRevision>();
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267 HgStatusCollector.Record r = new HgStatusCollector.Record();
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268 statusHelper.change(revNumber, r);
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269 final HgRepository repo = statusHelper.getRepo();
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270 for (Path s : r.getModified()) {
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271 Nodeid nid = r.nodeidAfterChange(s);
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272 if (nid == null) {
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273 throw new HgException(String.format("For the file %s recorded as modified couldn't find revision after change", s));
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274 }
415
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275 modified.add(new HgFileRevision(repo, nid, null, s, null));
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276 }
316
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277 final Map<Path, Path> copied = r.getCopied();
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278 for (Path s : r.getAdded()) {
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279 Nodeid nid = r.nodeidAfterChange(s);
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280 if (nid == null) {
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281 throw new HgException(String.format("For the file %s recorded as added couldn't find revision after change", s));
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282 }
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283 added.add(new HgFileRevision(repo, nid, null, s, copied.get(s)));
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284 }
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285 for (Path s : r.getRemoved()) {
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286 // with Path from getRemoved, may just copy
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287 deleted.add(s);
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288 }
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289 modified.trimToSize();
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290 added.trimToSize();
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291 deleted.trimToSize();
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292 modifiedFiles = Collections.unmodifiableList(modified);
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293 addedFiles = Collections.unmodifiableList(added);
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294 deletedFiles = Collections.unmodifiableList(deleted);
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295 }
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296 }