Setting variables from an entry within a layout

gistfile1.twig

{% set metaTitle = '(entry.metaTitle) ? entry.metaTitle : entry.title' %}
{% set metaDescription = entry.metaDescription %}
{% set metaKeywords = entry.metaKeywords %}
{% set metaRobots = entry.metaRobots %}
{% set openGraphImage = entry.openGraphImage.first() %}

{% if openGraphImage %}

	{% set ogCrop = {
	    mode: 'crop',
	    width: 1200,
	    height: 630,
	    quality: 75,
	    position: 'center'
	} %}

	{% set openGraphImage = openGraphImage.getUrl(ogCrop) %}

{% endif %}

{% include 'partials/_global_header.html' %}

	{% block content %}
		
	{% endblock %}

{% include 'partials/_global_footer.html' %}