PhabricatorRemarkupBlockInterpreterCowsay.php
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PhabricatorRemarkupBlockInterpreterCowsay.php
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			<?php

			final class PhabricatorRemarkupBlockInterpreterCowsay
			extends PhutilRemarkupBlockInterpreter {

			public function getInterpreterName() {
			return 'cowsay';
			}

			public function markupContent($content, array $argv) {
			if (!Filesystem::binaryExists('cowsay')) {
			return $this->markupError(
			pht('Unable to locate the `cowsay` binary. Install cowsay.'));
			}

			$bin = idx($argv, 'think') ? 'cowthink' : 'cowsay';
			$eyes = idx($argv, 'eyes', 'oo');
			$tongue = idx($argv, 'tongue', ' ');
			$cow = idx($argv, 'cow', 'default');

			// NOTE: Strip this aggressively to prevent nonsense like
			// `cow=/etc/passwd`. We could build a whiltelist with `cowsay -l`.
			$cow = preg_replace('/[^a-z.-]+/', '', $cow);

			$future = new ExecFuture(
			'%s -e %s -T %s -f %s ',
			$bin,
			$eyes,
			$tongue,
			$cow);

			$future->setTimeout(15);
			$future->write($content);

			list($err, $stdout, $stderr) = $future->resolve();

			if ($err) {
			return $this->markupError(
			pht(
			'Execution of `cowsay` failed:', $stderr));
			}


			if ($this->getEngine()->isTextMode()) {
			return $stdout;
			}

			return phutil_tag(
			'div',
			array(
			'class' => 'PhabricatorMonospaced remarkup-cowsay',
			),
			$stdout);
			}

			}