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<?php |
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/* this file is part of pipelines */ |
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namespace Ktomk\Pipelines\File\Pipeline; |
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use Ktomk\Pipelines\File\Image; |
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use Ktomk\Pipelines\File\ParseException; |
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class StepParser |
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{ |
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public static function validate(array $step, array $env) |
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{ |
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$parser = new StepParser($step, $env); |
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} |
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private function __construct(array $step, array $env) |
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{ |
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// quick validation: image name |
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Image::validate($step); |
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// quick validation: trigger |
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$this->validateTrigger($step, (bool)$env); |
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// quick validation: script + after-script |
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$this->parseScript($step); |
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$this->parseAfterScript($step); |
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} |
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/** |
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* validate step trigger (none, manual, automatic) |
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* |
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* @param array $array |
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* @param bool $isParallelStep |
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* |
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* @return void |
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*/ |
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private function validateTrigger(array $array, $isParallelStep) |
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{ |
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if (!array_key_exists('trigger', $array)) { |
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return; |
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} |
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$trigger = $array['trigger']; |
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if ($isParallelStep) { |
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throw new ParseException("Unexpected property 'trigger' in parallel step"); |
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} |
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if (!in_array($trigger, array('manual', 'automatic'), true)) { |
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throw new ParseException("'trigger' expects either 'manual' or 'automatic'"); |
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} |
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} |
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/** |
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* Parse a step script section |
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* |
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* @param array $step |
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* |
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* @throws ParseException |
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* |
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* @return void |
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*/ |
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private function parseScript(array $step) |
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{ |
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if (!isset($step['script'])) { |
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throw new ParseException("'step' requires a script"); |
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} |
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$this->parseNamedScript('script', $step); |
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} |
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/** |
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* @param array $step |
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* |
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* @return void |
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*/ |
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private function parseAfterScript(array $step) |
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{ |
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if (isset($step['after-script'])) { |
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$this->parseNamedScript('after-script', $step); |
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} |
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} |
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/** |
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* @param string $name |
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* @param $script |
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* |
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* @return void |
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*/ |
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private function parseNamedScript($name, array $script) |
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{ |
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if (!is_array($script[$name]) || !count($script[$name])) { |
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throw new ParseException("'${name}' requires a list of commands"); |
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} |
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foreach ($script[$name] as $index => $line) { |
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$this->parseNamedScriptLine($name, $index, $line); |
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} |
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} |
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/** |
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* @param string $name |
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* @param int $index |
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* @param null|array|bool|float|int|string $line |
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* |
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* @return void |
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*/ |
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private function parseNamedScriptLine($name, $index, $line) |
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{ |
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$standard = is_scalar($line) || null === $line; |
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$pipe = is_array($line) && isset($line['pipe']) && is_string($line['pipe']); |
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if (!($standard || $pipe)) { |
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throw new ParseException(sprintf( |
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"'%s' requires a list of commands, step #%d is not a command", |
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$name, |
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$index |
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)); |
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} |
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} |
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} |
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ktomk /
pipelines
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