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<?php |
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/** |
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* @author Gerard van Helden <[email protected]> |
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* @copyright Zicht Online <http://zicht.nl> |
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*/ |
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namespace Zicht\Tool\Container; |
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use Zicht\Tool\Script\Buffer; |
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use Zicht\Tool\Util; |
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/** |
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* Compilable node that represents an executable task |
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*/ |
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class Task extends Declaration |
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{ |
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/** |
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* Construct the task with the provided array as task definition |
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* |
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* @param array $path |
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* @param array $node |
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*/ |
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public function __construct($path, $node) |
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{ |
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parent::__construct($path); |
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if (strpos(end($this->path), '.') !== false) { |
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$end = array_pop($this->path); |
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$this->path = array_merge($this->path, explode('.', $end)); |
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} |
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$this->taskDef = $node; |
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} |
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/** |
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* Returns the task name. |
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* |
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* @return string |
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*/ |
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public function getName() |
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{ |
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return join('.', array_slice($this->path, 1)); |
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} |
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/** |
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* Returns the task help |
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* |
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* @return mixed |
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*/ |
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public function getHelp() |
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{ |
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return $this->taskDef['help']; |
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} |
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/** |
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* Compiles the task initialization code into the buffer. |
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* |
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* @param \Zicht\Tool\Script\Buffer $buffer |
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* @return void |
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*/ |
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public function compile(Buffer $buffer) |
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{ |
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parent::compile($buffer); |
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if (substr($this->getName(), 0, 1) !== '_') { |
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$buffer |
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->writeln('try {') |
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->indent(1) |
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->writeln('$z->addCommand(') |
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->indent(1) |
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->write('new \Zicht\Tool\Command\TaskCommand(') |
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->asPhp($this->getName()) |
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->raw(', ') |
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->asPhp($this->getArguments(true)) |
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->raw(', ') |
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->asPhp($this->getOptions()) |
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->raw(', ') |
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->asPhp($this->taskDef['flags']) |
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->raw(', ') |
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->asPhp($this->getHelp() ? $this->getHelp() : "(no help available for this task)") |
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->raw(')')->eol() |
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->indent(-1) |
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->writeln(');') |
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->indent(-1) |
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->writeln('} catch (\Exception $e) {') |
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->indent(1) |
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->writeln('throw new \Zicht\Tool\Container\ConfigurationException("Error while initializing task \'' . $this->getName() . '\'", 0, $e);') |
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->indent(-1) |
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->writeln('}') |
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; |
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} |
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} |
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/** |
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* Compile the node |
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* |
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* @param Buffer $buffer |
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* @return void |
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*/ |
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public function compileBody(Buffer $buffer) |
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{ |
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$buffer->writeln('$ret = null;'); |
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foreach ($this->taskDef['flags'] as $flag => $value) { |
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$buffer |
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->write('if (null === $z->resolve(')->asPhp($flag)->raw(', false)) {')->eol() |
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->indent(1) |
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->write('$z->set(')->asPhp($flag)->raw(', ')->asPhp($value)->raw(');')->eol() |
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->indent(-1) |
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->writeln('}') |
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; |
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} |
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foreach ($this->taskDef['args'] as $node) { |
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$node->compile($buffer); |
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} |
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foreach ($this->taskDef['opts'] as $node) { |
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$node->compile($buffer); |
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} |
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foreach ($this->taskDef['set'] as $node) { |
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$node->compile($buffer); |
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} |
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$buffer->writeln('$skip = false;'); |
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foreach (array('pre', 'do', 'post') as $scope) { |
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if ($scope === 'do') { |
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View Code Duplication |
if (!empty($this->taskDef['unless'])) { |
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$buffer->write('if (!$z->resolve(\'FORCE\') &&'); |
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$this->taskDef['unless']->compile($buffer); |
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$buffer->raw(') {')->eol()->indent(1); |
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$echoStr = sprintf('echo "%s skipped", because \'unless\' evaluated to true.', join('.', $this->path)); |
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$buffer->writeln(sprintf('$z->cmd(%s);', Util::toPhp($echoStr))); |
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$buffer->writeln('$skip = true;'); |
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$buffer->indent(-1); |
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$buffer->writeln('}'); |
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} |
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View Code Duplication |
if (!empty($this->taskDef['if'])) { |
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$buffer->write('if (!$z->resolve(\'FORCE\') && !('); |
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$this->taskDef['if']->compile($buffer); |
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$buffer->raw(') ) {')->eol()->indent(1); |
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$echoStr = sprintf('echo "%s skipped", because \'if\' evaluated to false.', join('.', $this->path)); |
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$buffer->writeln(sprintf('$z->cmd(%s);', Util::toPhp($echoStr))); |
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$buffer->writeln('$skip = true;'); |
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$buffer->indent(-1); |
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$buffer->writeln('}'); |
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} |
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if (!empty($this->taskDef['assert'])) { |
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$buffer->write('if (!('); |
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$this->taskDef['assert']->compile($buffer); |
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$buffer->raw(')) {')->eol()->indent(1); |
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$buffer->writeln('throw new \RuntimeException("Assertion failed");'); |
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$buffer->indent(-1)->writeln('}'); |
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} |
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$buffer->writeln('if (!$skip) {'); |
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$buffer->indent(1); |
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} |
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foreach ($this->taskDef[$scope] as $i => $cmd) { |
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$buffer->write('Debug::enterScope(')->asPhp($scope . '[' . $i . ']')->raw(');')->eol(); |
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if ($cmd) { |
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$cmd->compile($buffer); |
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} |
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$buffer->write('Debug::exitScope(')->asPhp($scope . '[' . $i . ']')->raw(');')->eol(); |
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} |
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if ($scope === 'post') { |
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$buffer->indent(-1); |
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$buffer->writeln('}'); |
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} |
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} |
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if (!empty($this->taskDef['yield'])) { |
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$buffer->writeln('$ret = '); |
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$this->taskDef['yield']->compile($buffer); |
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$buffer->write(';'); |
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} |
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$buffer->writeln('return $ret;'); |
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} |
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/** |
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* Returns all variables that can be injected into the task. |
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* |
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* @param bool $onlyPublic |
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* @return array |
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*/ |
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public function getArguments($onlyPublic = true) |
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{ |
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$ret = array(); |
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if (isset($this->taskDef['args'])) { |
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foreach ($this->taskDef['args'] as $name => $expr) { |
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if ($onlyPublic && $name{0} === '_') { |
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// Variables prefixed with an underscore are considered non public |
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continue; |
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} |
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if ($expr->conditional) { |
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// if the part after the question mark is empty, the variable is assumed to be required |
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// for execution of the task |
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$ret[$name] = ($expr->nodes[0] === null); |
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} |
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} |
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} |
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return $ret; |
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} |
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/** |
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* Returns all variables that can be injected into the task. |
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* |
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* @return array |
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*/ |
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public function getOptions() |
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{ |
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$ret = array(); |
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if (!empty($this->taskDef['opts'])) { |
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foreach ($this->taskDef['opts'] as $opt) { |
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$ret[] = $opt->name; |
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} |
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} |
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return $ret; |
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} |
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} |
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: