comparison vendor/psy/psysh/src/Command/ParseCommand.php @ 0:c75dbcec494b

Initial commit from drush-created site

+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2018 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Command;
+
+use PhpParser\Node;
+use PhpParser\Parser;
+use Psy\Context;
+use Psy\ContextAware;
+use Psy\Input\CodeArgument;
+use Psy\ParserFactory;
+use Psy\VarDumper\Presenter;
+use Psy\VarDumper\PresenterAware;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\VarDumper\Caster\Caster;
+
+/**
+ * Parse PHP code and show the abstract syntax tree.
+ */
+class ParseCommand extends Command implements ContextAware, PresenterAware
+{
+    /**
+     * Context instance (for ContextAware interface).
+     *
+     * @var Context
+     */
+    protected $context;
+
+    private $presenter;
+    private $parserFactory;
+    private $parsers;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __construct($name = null)
+    {
+        $this->parserFactory = new ParserFactory();
+        $this->parsers       = [];
+
+        parent::__construct($name);
+    }
+
+    /**
+     * ContextAware interface.
+     *
+     * @param Context $context
+     */
+    public function setContext(Context $context)
+    {
+        $this->context = $context;
+    }
+
+    /**
+     * PresenterAware interface.
+     *
+     * @param Presenter $presenter
+     */
+    public function setPresenter(Presenter $presenter)
+    {
+        $this->presenter = clone $presenter;
+        $this->presenter->addCasters([
+            'PhpParser\Node' => function (Node $node, array $a) {
+                $a = [
+                    Caster::PREFIX_VIRTUAL . 'type'       => $node->getType(),
+                    Caster::PREFIX_VIRTUAL . 'attributes' => $node->getAttributes(),
+                ];
+
+                foreach ($node->getSubNodeNames() as $name) {
+                    $a[Caster::PREFIX_VIRTUAL . $name] = $node->$name;
+                }
+
+                return $a;
+            },
+        ]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $definition = [
+            new CodeArgument('code', CodeArgument::REQUIRED, 'PHP code to parse.'),
+            new InputOption('depth', '', InputOption::VALUE_REQUIRED, 'Depth to parse.', 10),
+        ];
+
+        if ($this->parserFactory->hasKindsSupport()) {
+            $msg = 'One of PhpParser\\ParserFactory constants: '
+                . implode(', ', ParserFactory::getPossibleKinds())
+                . " (default is based on current interpreter's version).";
+            $defaultKind = $this->parserFactory->getDefaultKind();
+
+            $definition[] = new InputOption('kind', '', InputOption::VALUE_REQUIRED, $msg, $defaultKind);
+        }
+
+        $this
+            ->setName('parse')
+            ->setDefinition($definition)
+            ->setDescription('Parse PHP code and show the abstract syntax tree.')
+            ->setHelp(
+                <<<'HELP'
+Parse PHP code and show the abstract syntax tree.
+
+This command is used in the development of PsySH. Given a string of PHP code,
+it pretty-prints the PHP Parser parse tree.
+
+See https://github.com/nikic/PHP-Parser
+
+It prolly won't be super useful for most of you, but it's here if you want to play.
+HELP
+            );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $code = $input->getArgument('code');
+        if (strpos('<?', $code) === false) {
+            $code = '<?php ' . $code;
+        }
+
+        $parserKind = $this->parserFactory->hasKindsSupport() ? $input->getOption('kind') : null;
+        $depth      = $input->getOption('depth');
+        $nodes      = $this->parse($this->getParser($parserKind), $code);
+        $output->page($this->presenter->present($nodes, $depth));
+
+        $this->context->setReturnValue($nodes);
+    }
+
+    /**
+     * Lex and parse a string of code into statements.
+     *
+     * @param Parser $parser
+     * @param string $code
+     *
+     * @return array Statements
+     */
+    private function parse(Parser $parser, $code)
+    {
+        try {
+            return $parser->parse($code);
+        } catch (\PhpParser\Error $e) {
+            if (strpos($e->getMessage(), 'unexpected EOF') === false) {
+                throw $e;
+            }
+
+            // If we got an unexpected EOF, let's try it again with a semicolon.
+            return $parser->parse($code . ';');
+        }
+    }
+
+    /**
+     * Get (or create) the Parser instance.
+     *
+     * @param string|null $kind One of Psy\ParserFactory constants (only for PHP parser 2.0 and above)
+     *
+     * @return Parser
+     */
+    private function getParser($kind = null)
+    {
+        if (!array_key_exists($kind, $this->parsers)) {
+            $this->parsers[$kind] = $this->parserFactory->createParser($kind);
+        }
+
+        return $this->parsers[$kind];
+    }
+}