D8235.id19598.diff
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	diff --git a/src/infrastructure/markup/interpreter/PhabricatorRemarkupBlockInterpreterGraphviz.php b/src/infrastructure/markup/interpreter/PhabricatorRemarkupBlockInterpreterGraphviz.php
	--- a/src/infrastructure/markup/interpreter/PhabricatorRemarkupBlockInterpreterGraphviz.php
	+++ b/src/infrastructure/markup/interpreter/PhabricatorRemarkupBlockInterpreterGraphviz.php
	@@ -13,6 +13,14 @@
	pht('Unable to locate the `dot` binary. Install Graphviz.'));
	}

	+ $style = array();
	+
	+ $width = idx($argv, 'width', '');
	+
	+ if ($width) {
	+ $style[] = 'width: ' . $this->parseDimension($width);
	+ }
	+
	$future = id(new ExecFuture('dot -T%s', 'png'))
	->setTimeout(15)
	->write(trim($content));
	@@ -41,7 +49,19 @@
	'img',
	array(
	'src' => $file->getBestURI(),
	+ 'style' => implode(';', $style),
	));
	}

	+ // XXX: This is duplicated from PhabricatorRemarkupRuleEmbedFile
	+ // since they do not share a base class
	+ private function parseDimension($string) {
	+ $string = trim($string);
	+
	+ if (preg_match('/^(?:\d*\\.)?\d+%?$/', $string)) {
	+ return $string;
	+ }
	+
	+ return null;
	+ }
	}