Mercurial > jhg

annotate src/org/tmatesoft/hg/core/HgChangeset.java @ 417:ccd7d25e5aea

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
New and better name for HgFileInformer - HgChangesetFileSneaker. Explain (comments) ties between HgManifest, HgDataFile, HgChangesetFileSneaker and reasons for method placement
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 22 Mar 2012 20:14:06 +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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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 }
211
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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 }