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<?php |
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/* this file is part of pipelines */ |
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namespace Ktomk\Pipelines\Utility; |
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use Exception; |
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use Ktomk\Pipelines\Cli\ArgsException; |
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use Ktomk\Pipelines\Cli\Streams; |
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use Ktomk\Pipelines\File\ParseException; |
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class ExceptionHandler |
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{ |
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/** |
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* @var bool |
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*/ |
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private $showStacktraceFlag; |
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/** |
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* @var Help |
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*/ |
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private $help; |
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/** |
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* @var Streams |
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*/ |
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private $streams; |
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/** |
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* ExceptionHandler constructor. |
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* |
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* @param Streams $streams |
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* @param Help $help |
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* @param bool $showStacktrace |
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*/ |
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public function __construct(Streams $streams, Help $help, $showStacktrace) |
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{ |
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$this->streams = $streams; |
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$this->help = $help; |
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$this->showStacktraceFlag = $showStacktrace; |
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} |
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/** |
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* @param Runnable $runnable |
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* |
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* @return mixed|void |
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*/ |
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public function handle(Runnable $runnable) |
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{ |
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try { |
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$status = $runnable->run(); |
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} catch (Exception $e) { |
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$status = $this->handleException($e); |
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} |
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return $status; |
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} |
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/** |
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* @param Exception $e |
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* |
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* @return int |
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*/ |
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private function handleException(Exception $e) |
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{ |
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$status = $e->getCode(); |
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$message = $e->getMessage(); |
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// "catch" unexpected exceptions for user-friendly message |
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if (!is_int($status) || $this->isUnexpectedException($e)) { |
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$status = 2; |
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$message = sprintf('fatal: %s', $e->getMessage()); |
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} |
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$this->showError($status, $message); |
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$this->showUsage($e); |
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$this->showStacktrace($e); |
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return $status; |
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} |
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/** |
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* Show error message |
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* |
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* @param int $status |
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* @param string $message |
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* |
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* @return void |
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*/ |
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private function showError($status, $message) |
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{ |
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if (0 !== $status && '' !== $message) { |
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$this->error(sprintf('pipelines: %s', $message)); |
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} |
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} |
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/** |
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* Some exceptions can show usage |
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* |
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* @param Exception $e |
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* |
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* @return void |
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*/ |
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private function showUsage(Exception $e) |
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{ |
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if ($e instanceof ArgsException) { |
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$this->help->showUsage(); |
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} |
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} |
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/** |
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* Show a stacktrace for debugging purposes (`--debug`` flag) |
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* |
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* @param Exception $e |
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* |
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* @return void |
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*/ |
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private function showStacktrace(Exception $e) |
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{ |
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if ($this->showStacktraceFlag) { |
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$this->debugException($e); |
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} |
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} |
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/** |
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* Some exceptions are not unexpected |
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* |
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* The pipelines utility uses *some* exceptions to signal program |
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* flow in context of the command line utility. E.g. to not call |
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* exit() somewhere deep in the code (StatusException), lazy command |
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* line argument handling (ArgsException) and lazy pipelines.yml |
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* file parsing (ParseException). |
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* |
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* @param Exception $e |
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* |
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* @return bool |
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*/ |
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private function isUnexpectedException(Exception $e) |
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{ |
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return ( |
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!($e instanceof ArgsException) |
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&& !($e instanceof StatusException) |
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&& !($e instanceof ParseException) |
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); |
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} |
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/** |
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* @param Exception $e |
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* |
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* @return void |
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*/ |
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private function debugException(Exception $e) |
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{ |
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$this->debugInfoOfPipelinesItself(); |
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for (; $e; $e = $e->getPrevious()) { |
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$this->error('--------'); |
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$this->error(sprintf('class....: %s', get_class($e))); |
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$this->error(sprintf('message..: %s', $e->getMessage())); |
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$this->error(sprintf('code.....: %s', $e->getCode())); |
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$this->error(sprintf('file.....: %s', $e->getFile())); |
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$this->error(sprintf('line.....: %s', $e->getLine())); |
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$this->error('backtrace:'); |
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$this->error($e->getTraceAsString()); |
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} |
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$this->error('--------'); |
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} |
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private function debugInfoOfPipelinesItself() |
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{ |
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$this->error(sprintf( |
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'pipelines: version %s w/ php %s (libyaml: %s)', |
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Version::resolve(App::VERSION), |
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PHP_VERSION, |
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\phpversion('yaml') ?: 'n/a' |
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)); |
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} |
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/** |
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* @param string $message |
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* |
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* @return void |
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*/ |
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private function error($message) |
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{ |
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$this->streams->err( |
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sprintf("%s\n", $message) |
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); |
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} |
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} |
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ktomk /
pipelines
