| Total Complexity | 56 |
| Total Lines | 268 |
| Duplicated Lines | 0 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 0 |
Complex classes like IsoTool often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use IsoTool, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 19 | class IsoTool |
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| 20 | { |
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| 21 | public function run(): void |
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| 22 | { |
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| 23 | $options = $this->parseCliArgs(); |
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| 24 | |||
| 25 | if ($options === []) { |
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| 26 | $this->displayHelp(); |
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| 27 | exit(1); |
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| 28 | } |
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| 29 | |||
| 30 | $fileValue = $options['file'] ?? $options['f']; |
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| 31 | |||
| 32 | $file = ''; |
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| 33 | |||
| 34 | if (is_array($fileValue)) { |
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| 35 | $file = current($fileValue); |
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| 36 | } elseif (is_string($fileValue)) { |
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| 37 | $file = $fileValue; |
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| 38 | } |
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| 39 | |||
| 40 | if (! is_string($file) || $file === '') { |
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| 41 | $this->displayError('Invalid value for file received'); |
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| 42 | exit(2); |
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| 43 | } |
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| 44 | |||
| 45 | $extractPath = ''; |
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| 46 | if (isset($options['extract']) && is_string($options['extract'])) { |
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| 47 | $extractPath = $options['extract']; |
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| 48 | } elseif (isset($options['x']) && is_string($options['x'])) { |
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| 49 | $extractPath = $options['x']; |
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| 50 | } |
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| 51 | |||
| 52 | echo 'Input ISO file: ' . $file . PHP_EOL; |
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| 53 | |||
| 54 | try { |
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| 55 | $this->checkIsoFile($file); |
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| 56 | |||
| 57 | if ($extractPath !== '') { |
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| 58 | $this->extractAction($file, $extractPath); |
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| 59 | } else { |
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| 60 | $this->infoAction($file); |
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| 61 | } |
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| 62 | } catch (Throwable $ex) { |
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| 63 | $this->displayError($ex->getMessage()); |
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| 64 | exit(3); |
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| 65 | } |
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| 66 | } |
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| 67 | |||
| 68 | protected function checkIsoFile(string $file): void |
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| 69 | { |
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| 70 | if (! file_exists($file)) { |
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| 71 | throw new Exception('ISO file does not exist.'); |
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| 72 | } |
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| 73 | |||
| 74 | if (! is_file($file)) { |
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| 75 | throw new Exception('Path is not a valid file.'); |
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| 76 | } |
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| 77 | } |
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| 78 | |||
| 79 | protected function infoAction(string $file): void |
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| 80 | { |
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| 81 | $isoFile = new IsoFile($file); |
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| 82 | |||
| 83 | echo PHP_EOL; |
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| 84 | |||
| 85 | echo 'Number of descriptors: ' . count($isoFile->descriptors) . PHP_EOL; |
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| 86 | |||
| 87 | /** @var Descriptor $descriptor */ |
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| 88 | foreach ($isoFile->descriptors as $descriptor) { |
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| 89 | echo ' - ' . $descriptor->name . PHP_EOL; |
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| 90 | |||
| 91 | if ($descriptor instanceof Volume) { |
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| 92 | $this->infoVolume($descriptor); |
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| 93 | $this->displayFiles($descriptor, $isoFile); |
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| 94 | } elseif ($descriptor instanceof Boot) { |
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| 95 | $this->infoBoot($descriptor); |
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| 96 | } |
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| 97 | |||
| 98 | echo PHP_EOL; |
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| 99 | } |
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| 100 | } |
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| 101 | |||
| 102 | protected function extractAction(string $file, string $extractPath): void |
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| 103 | { |
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| 104 | if (! is_dir($extractPath)) { |
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| 105 | $mkdirResult = mkdir($extractPath, 0777, true); |
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| 106 | |||
| 107 | if ($mkdirResult === false) { |
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| 108 | throw new Exception('Failed to create extract output directory: ' . $extractPath); |
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| 109 | } |
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| 110 | } |
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| 111 | |||
| 112 | $isoFile = new IsoFile($file); |
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| 113 | |||
| 114 | echo 'Extract ISO file to: ' . $extractPath . PHP_EOL; |
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| 115 | |||
| 116 | if (isset($isoFile->descriptors[Type::SUPPLEMENTARY_VOLUME_DESC]) && $isoFile->descriptors[Type::SUPPLEMENTARY_VOLUME_DESC] instanceof SupplementaryVolume) { |
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| 117 | $this->extractFiles($isoFile->descriptors[Type::SUPPLEMENTARY_VOLUME_DESC], $isoFile, $extractPath); |
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| 118 | } elseif (isset($isoFile->descriptors[Type::PRIMARY_VOLUME_DESC]) && $isoFile->descriptors[Type::PRIMARY_VOLUME_DESC] instanceof PrimaryVolume) { |
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| 119 | $this->extractFiles($isoFile->descriptors[Type::PRIMARY_VOLUME_DESC], $isoFile, $extractPath); |
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| 120 | } |
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| 121 | |||
| 122 | echo 'Extract finished!' . PHP_EOL; |
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| 123 | } |
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| 124 | |||
| 125 | protected function extractFiles(Volume $volumeDescriptor, IsoFile $isoFile, string $destinationDir): void |
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| 126 | { |
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| 127 | $pathTable = $volumeDescriptor->loadTable($isoFile); |
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| 128 | |||
| 129 | if ($pathTable === null) { |
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| 130 | return; |
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| 131 | } |
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| 132 | |||
| 133 | $destinationDir = rtrim($destinationDir, DIRECTORY_SEPARATOR); |
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| 134 | |||
| 135 | /** @var PathTableRecord $pathRecord */ |
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| 136 | foreach ($pathTable as $pathRecord) { |
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| 137 | // check extents |
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| 138 | $extents = $pathRecord->loadExtents($isoFile, $volumeDescriptor->blockSize, ($volumeDescriptor->getType() === Type::SUPPLEMENTARY_VOLUME_DESC), $volumeDescriptor->jolietLevel); |
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| 139 | |||
| 140 | if ($extents !== false) { |
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| 141 | /** @var FileDirectory $extentRecord */ |
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| 142 | foreach ($extents as $extentRecord) { |
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| 143 | $path = $extentRecord->fileId; |
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| 144 | |||
| 145 | if (! $extentRecord->isThis() && ! $extentRecord->isParent()) { |
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| 146 | $fullPath = $destinationDir . $pathRecord->getFullPath($pathTable) . $path; |
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| 147 | if ($extentRecord->isDirectory()) { |
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| 148 | $fullPath .= DIRECTORY_SEPARATOR; |
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| 149 | } |
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| 150 | |||
| 151 | if (! $extentRecord->isDirectory()) { |
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| 152 | $location = $extentRecord->location; |
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| 153 | $dataLength = $extentRecord->dataLength; |
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| 154 | echo $fullPath . ' (location: ' . $location . ') (length: ' . $dataLength . ')' . PHP_EOL; |
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| 155 | |||
| 156 | $dirPath = dirname($fullPath); |
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| 157 | if (! is_dir($dirPath)) { |
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| 158 | if (mkdir($dirPath, 0777, true) === false) { |
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| 159 | throw new Exception('Failed to create directory: ' . $dirPath); |
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| 160 | } |
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| 161 | } |
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| 162 | |||
| 163 | $pathRecord->extractFile($isoFile, $volumeDescriptor->blockSize, $location, $dataLength, $fullPath); |
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| 164 | } else { |
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| 165 | if (! is_dir($fullPath)) { |
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| 166 | if (mkdir($fullPath, 0777, true) === false) { |
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| 167 | throw new Exception('Failed to create directory: ' . $fullPath); |
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| 168 | } |
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| 169 | } |
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| 170 | } |
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| 171 | } |
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| 172 | } |
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| 173 | } |
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| 174 | } |
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| 175 | } |
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| 176 | |||
| 177 | protected function infoVolume(Volume $volumeDescriptor): void |
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| 178 | { |
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| 179 | echo ' - System ID: ' . $volumeDescriptor->systemId . PHP_EOL; |
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| 180 | echo ' - Volume ID: ' . $volumeDescriptor->volumeId . PHP_EOL; |
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| 181 | echo ' - App ID: ' . $volumeDescriptor->appId . PHP_EOL; |
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| 182 | echo ' - File Structure Version: ' . $volumeDescriptor->fileStructureVersion . PHP_EOL; |
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| 183 | echo ' - Volume Space Size: ' . $volumeDescriptor->volumeSpaceSize . PHP_EOL; |
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| 184 | echo ' - Volume Set Size: ' . $volumeDescriptor->volumeSetSize . PHP_EOL; |
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| 185 | echo ' - Volume SeqNum: ' . $volumeDescriptor->volumeSeqNum . PHP_EOL; |
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| 186 | echo ' - Block size: ' . $volumeDescriptor->blockSize . PHP_EOL; |
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| 187 | echo ' - Volume Set ID: ' . $volumeDescriptor->volumeSetId . PHP_EOL; |
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| 188 | echo ' - Publisher ID: ' . $volumeDescriptor->publisherId . PHP_EOL; |
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| 189 | echo ' - Preparer ID: ' . $volumeDescriptor->preparerId . PHP_EOL; |
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| 190 | echo ' - Copyright File ID: ' . $volumeDescriptor->copyrightFileId . PHP_EOL; |
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| 191 | echo ' - Abstract File ID: ' . $volumeDescriptor->abstractFileId . PHP_EOL; |
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| 192 | echo ' - Bibliographic File ID: ' . $volumeDescriptor->bibliographicFileId . PHP_EOL; |
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| 193 | echo ' - Creation Date: ' . $volumeDescriptor->creationDate?->toDateTimeString() . PHP_EOL; |
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| 194 | echo ' - Modification Date: ' . $volumeDescriptor->modificationDate?->toDateTimeString() . PHP_EOL; |
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| 195 | echo ' - Expiration Date: ' . $volumeDescriptor->expirationDate?->toDateTimeString() . PHP_EOL; |
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| 196 | echo ' - Effective Date: ' . $volumeDescriptor->effectiveDate?->toDateTimeString() . PHP_EOL; |
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| 197 | |||
| 198 | if ($volumeDescriptor instanceof SupplementaryVolume && $volumeDescriptor->jolietLevel !== 0) { |
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| 199 | echo ' - Joliet Level: ' . $volumeDescriptor->jolietLevel . PHP_EOL; |
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| 200 | } |
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| 201 | } |
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| 202 | |||
| 203 | protected function displayFiles(Volume $volumeDescriptor, IsoFile $isoFile): void |
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| 235 | } |
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| 236 | } |
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| 237 | } |
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| 238 | } |
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| 239 | } |
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| 240 | } |
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| 241 | |||
| 242 | protected function infoBoot(Boot $bootDescriptor): void |
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| 243 | { |
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| 244 | echo ' - Boot System ID: ' . $bootDescriptor->bootSysId . PHP_EOL; |
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| 245 | echo ' - Boot ID: ' . $bootDescriptor->bootId . PHP_EOL; |
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| 246 | echo ' - Boot Catalog Location: ' . $bootDescriptor->bootCatalogLocation . PHP_EOL; |
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| 247 | } |
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| 248 | |||
| 249 | /** |
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| 250 | * @return array<string, mixed> |
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| 251 | */ |
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| 252 | protected function parseCliArgs(): array |
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| 266 | } |
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| 267 | |||
| 268 | protected function displayError(string $error): void |
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| 271 | } |
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| 272 | |||
| 273 | protected function displayHelp(): void |
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| 274 | { |
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| 289 |