Mercurial > jhg
annotate src/org/tmatesoft/hg/internal/WorkingDirFileWriter.java @ 686:f1f095e42555
Annotated file is not always changed in the latest changeset, need to find out last changest it was changed at (iow, diffed to with BlameHelper)
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 25 Jul 2013 22:12:14 +0200 (2013-07-25) |
parents | 6526d8adbc0f |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2012-2013 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.internal; |
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18 |
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19 import static org.tmatesoft.hg.util.LogFacility.Severity.Warn; |
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20 |
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21 import java.io.File; |
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22 import java.io.FileOutputStream; |
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23 import java.io.IOException; |
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24 import java.nio.ByteBuffer; |
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25 import java.nio.channels.FileChannel; |
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26 |
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27 import org.tmatesoft.hg.repo.HgDataFile; |
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28 import org.tmatesoft.hg.repo.HgManifest; |
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29 import org.tmatesoft.hg.repo.HgRuntimeException; |
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30 import org.tmatesoft.hg.util.ByteChannel; |
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31 import org.tmatesoft.hg.util.CancelledException; |
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32 import org.tmatesoft.hg.util.LogFacility.Severity; |
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33 import org.tmatesoft.hg.util.Path; |
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34 |
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35 /** |
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36 * |
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37 * @author Artem Tikhomirov |
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38 * @author TMate Software Ltd. |
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39 */ |
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40 public class WorkingDirFileWriter implements ByteChannel { |
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41 |
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42 |
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43 private final Internals hgRepo; |
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44 private final boolean execCap, symlinkCap; |
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45 private final FileSystemHelper fileFlagsHelper; |
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46 private File dest; |
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47 private FileChannel destChannel; |
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48 private int totalBytesWritten; |
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49 private ByteArrayChannel linkChannel; |
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50 private int fmode; |
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51 |
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52 public WorkingDirFileWriter(Internals internalRepo) { |
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53 hgRepo = internalRepo; |
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54 execCap = Internals.checkSupportsExecutables(internalRepo.getRepo().getWorkingDir()); |
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55 symlinkCap = Internals.checkSupportsSymlinks(internalRepo.getRepo().getWorkingDir()); |
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56 if (symlinkCap || execCap) { |
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57 fileFlagsHelper = new FileSystemHelper(internalRepo.getSessionContext()); |
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58 } else { |
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59 fileFlagsHelper = null; |
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60 } |
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61 } |
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62 |
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63 /** |
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64 * Writes content of specified file revision into local filesystem, or create a symlink according to flags. |
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65 * Executable bit is set if specified and filesystem supports it. |
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66 * @throws HgRuntimeException |
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67 */ |
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68 public void processFile(HgDataFile df, int fileRevIndex, HgManifest.Flags flags) throws IOException, HgRuntimeException { |
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69 try { |
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70 prepare(df.getPath()); |
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71 if (flags != HgManifest.Flags.Link) { |
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72 destChannel = new FileOutputStream(dest).getChannel(); |
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73 } else { |
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74 linkChannel = new ByteArrayChannel(); |
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75 } |
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76 df.contentWithFilters(fileRevIndex, this); |
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77 } catch (CancelledException ex) { |
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78 hgRepo.getSessionContext().getLog().dump(getClass(), Severity.Error, ex, "Our impl doesn't throw cancellation"); |
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79 } finally { |
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80 if (flags != HgManifest.Flags.Link) { |
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81 destChannel.close(); |
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82 destChannel = null; |
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83 // leave dest in case anyone enquires with #getDestinationFile |
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84 } |
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85 } |
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86 if (linkChannel != null && symlinkCap) { |
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87 assert flags == HgManifest.Flags.Link; |
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88 fileFlagsHelper.createSymlink(dest.getParentFile(), dest.getName(), linkChannel.toArray()); |
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89 } else if (flags == HgManifest.Flags.Exec && execCap) { |
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90 fileFlagsHelper.setExecutableBit(dest.getParentFile(), dest.getName()); |
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91 } |
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92 // Although HgWCStatusCollector treats 644 (`hg manifest -v`) and 664 (my fs) the same, it's better |
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93 // to detect actual flags here |
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94 fmode = flags.fsMode(); // default to one from manifest |
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95 if (fileFlagsHelper != null) { |
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96 // if neither execBit nor link is supported by fs, it's unlikely file mode is supported, too. |
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97 try { |
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98 fmode = fileFlagsHelper.getFileMode(dest, fmode); |
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99 } catch (IOException ex) { |
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100 // Warn, we've got default value and can live with it |
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101 hgRepo.getSessionContext().getLog().dump(getClass(), Warn, ex, "Failed get file access rights"); |
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102 } |
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103 } |
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104 } |
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105 |
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106 public void prepare(Path fname) throws IOException { |
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107 String fpath = fname.toString(); |
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108 dest = new File(hgRepo.getRepo().getWorkingDir(), fpath); |
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109 if (fpath.indexOf('/') != -1) { |
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110 dest.getParentFile().mkdirs(); |
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111 } |
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112 destChannel = null; |
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113 linkChannel = null; |
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114 totalBytesWritten = 0; |
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115 fmode = 0; |
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116 } |
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117 |
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118 public int write(ByteBuffer buffer) throws IOException, CancelledException { |
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119 final int written; |
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120 if (linkChannel != null) { |
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121 written = linkChannel.write(buffer); |
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122 } else { |
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123 written = destChannel.write(buffer); |
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124 } |
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125 totalBytesWritten += written; |
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126 return written; |
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127 } |
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128 |
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129 /** |
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130 * Information purposes only, to find out trouble location if {@link #processFile(HgDataFile, int)} fails |
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131 */ |
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132 public File getDestinationFile() { |
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133 return dest; |
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134 } |
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135 |
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136 public int bytesWritten() { |
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137 return totalBytesWritten; |
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138 } |
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139 |
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140 public int fmode() { |
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141 return fmode; |
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142 } |
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143 |
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144 public int mtime() { |
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145 return (int) (dest.lastModified() / 1000); |
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146 } |
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147 } |