Mercurial > jhg
annotate src/org/tmatesoft/hg/core/HgFileInformer.java @ 294:32890bab7209
Issue 13: Report filenames as they are known in repository rather than from file system
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Wed, 14 Sep 2011 04:41:57 +0200 |
parents | 6dbbc53fc46d |
children | 981f9f50bb6c |
rev | line source |
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1 /* |
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2 * Copyright (c) 2011 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 org.tmatesoft.hg.internal.ManifestRevision; |
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20 import org.tmatesoft.hg.repo.HgDataFile; |
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21 import org.tmatesoft.hg.repo.HgRepository; |
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22 import org.tmatesoft.hg.util.Path; |
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23 |
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24 /** |
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25 * Primary purpose is to provide information about file revisions at specific changeset. Multiple {@link #check(Path)} calls |
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26 * are possible once {@link #changeset(Nodeid)} (and optionally, {@link #followRenames(boolean)}) were set. |
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27 * |
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28 * <p>Sample: |
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29 * <pre><code> |
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30 * HgFileInformer i = new HgFileInformer(hgRepo).changeset(Nodeid.fromString("<40 digits>")).followRenames(true); |
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31 * if (i.check(file)) { |
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32 * HgCatCommand catCmd = new HgCatCommand(hgRepo).revision(i.getFileRevision()); |
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33 * catCmd.execute(...); |
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34 * ... |
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35 * } |
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36 * </pre></code> |
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37 * |
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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 HgFileInformer { |
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42 |
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43 private final HgRepository repo; |
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44 private boolean followRenames; |
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45 private Nodeid cset; |
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46 private ManifestRevision cachedManifest; |
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47 private HgFileRevision fileRevision; |
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48 private boolean checked, renamed; |
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49 |
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50 public HgFileInformer(HgRepository hgRepo) { |
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51 repo = hgRepo; |
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52 } |
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53 |
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54 /** |
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55 * Select specific changelog revision |
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56 * |
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57 * @param nid changeset identifier |
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58 * @return <code>this</code> for convenience |
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59 */ |
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60 public HgFileInformer changeset(Nodeid nid) { |
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61 if (nid == null || nid.isNull()) { |
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62 throw new IllegalArgumentException(); |
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63 } |
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64 cset = nid; |
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65 cachedManifest = null; |
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66 fileRevision = null; |
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67 return this; |
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68 } |
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69 |
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70 /** |
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71 * Whether to check file origins, default is false (look up only the name supplied) |
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72 * |
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73 * @param follow <code>true</code> to check copy/rename origin of the file if it is a copy. |
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74 * @return <code>this</code> for convenience |
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75 */ |
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76 public HgFileInformer followRenames(boolean follow) { |
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77 followRenames = follow; |
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78 fileRevision = null; |
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79 return this; |
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80 } |
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81 |
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82 /** |
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83 * Find file (or its origin, if {@link #followRenames(boolean)} was set to <code>true</code>) among files known at specified {@link #changeset(Nodeid)}. |
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84 * |
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85 * @param file name of the file in question |
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86 * @return <code>true</code> if file is known at the selected changeset. |
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87 * @throws IllegalArgumentException if {@link #changeset(Nodeid)} not specified or file argument is bad. |
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88 */ |
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89 public boolean check(Path file) { // XXX IStatus instead of boolean? |
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90 fileRevision = null; |
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91 checked = false; |
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92 renamed = false; |
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93 if (cset == null || file == null || file.isDirectory()) { |
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94 throw new IllegalArgumentException(); |
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95 } |
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96 HgDataFile dataFile = repo.getFileNode(file); |
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97 if (!dataFile.exists()) { |
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98 return false; |
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99 } |
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100 if (cachedManifest == null) { |
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101 int csetRev = repo.getChangelog().getLocalRevision(cset); |
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102 cachedManifest = new ManifestRevision(null, null); // XXX how about context and cached manifest revisions |
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103 repo.getManifest().walk(csetRev, csetRev, cachedManifest); |
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104 // cachedManifest shall be meaningful - changelog.getLocalRevision above ensures we've got version that exists. |
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105 } |
285
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106 Nodeid toExtract = cachedManifest.nodeid(file); |
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107 try { |
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108 if (toExtract == null && followRenames) { |
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109 while (toExtract == null && dataFile.isCopy()) { |
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110 renamed = true; |
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111 file = dataFile.getCopySourceName(); |
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112 dataFile = repo.getFileNode(file); |
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113 toExtract = cachedManifest.nodeid(file); |
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114 } |
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115 } |
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116 } catch (HgDataStreamException ex) { |
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117 ex.printStackTrace(); // XXX log(INFO) |
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118 // ignore now, however if there's IStatus retval, might report error with reasonable explanation. |
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119 // Perhaps, may add a String reason() method with such info? |
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120 } |
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121 checked = true; |
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122 if (toExtract != null) { |
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123 fileRevision = new HgFileRevision(repo, toExtract, dataFile.getPath()); |
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124 return true; |
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125 } // else String.format("File %s nor its origins were not known at repository %s revision", file, cset.shortNotation()) |
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126 return false; |
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127 } |
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128 |
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129 /** |
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130 * @return result of the last {@link #check(Path)} call. |
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131 */ |
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132 public boolean exists() { |
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133 assertCheckRan(); |
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134 return fileRevision != null; |
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135 } |
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136 |
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137 /** |
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138 * @return <code>true</code> if checked file was known by another name at the time of specified changeset. |
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139 */ |
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140 public boolean hasAnotherName() { |
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141 assertCheckRan(); |
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142 return renamed; |
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143 } |
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144 |
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145 /** |
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146 * @return holder for file revision information |
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147 */ |
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148 public HgFileRevision getFileRevision() { |
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149 assertCheckRan(); |
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150 return fileRevision; |
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151 } |
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152 |
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153 /** |
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154 * Name of the checked file as it was known at the time of the specified changeset. |
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155 * |
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156 * @return handy shortcut for <code>getFileRevision().getPath()</code> |
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157 */ |
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158 public Path filename() { |
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159 assertCheckRan(); |
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160 return fileRevision.getPath(); |
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161 } |
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162 |
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163 /** |
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164 * Revision of the checked file |
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165 * |
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166 * @return handy shortcut for <code>getFileRevision().getRevision()</code> |
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167 */ |
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168 public Nodeid revision() { |
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169 assertCheckRan(); |
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170 return fileRevision.getRevision(); |
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171 } |
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172 |
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173 private void assertCheckRan() { |
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174 if (!checked) { |
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175 throw new HgBadStateException("Shall invoke #check(Path) first"); |
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176 } |
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177 } |
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178 } |