Simple social sharing for WP posts. Requires the post_thumbnail_url() function (a different gist) and https://github.com/cferdinandi/social-sharing#readme

simple-social-sharing.php

<?php
if ( has_post_thumbnail() ):
	$socialimg = post_thumbnail_url($post->ID, $size = 'large');
else:
	$socialimg = '';
endif;
?>

<ul class="social-links">
	<li><a target="_blank" href="https://facebook.com/sharer.php?u=<?php echo esc_url( get_permalink() ); ?>"><span aria-hidden="true" class="icon-facebook"></span></a></li>
	<li><a target="_blank" href="https://pinterest.com/pin/create/button/?url=<?php echo esc_url( get_permalink() ); ?>&description=<?php echo urlencode( get_the_title() ); ?>&media=<?php echo $socialimg; ?>"><span aria-hidden="true" class="icon-pinterest"></span></a></li>
	<li><a target="_blank" href="https://twitter.com/intent/tweet?text=<?php echo urlencode( get_the_title() ); ?>&url=<?php echo esc_url( get_permalink() ); ?>"><span aria-hidden="true" class="icon-twitter"></span></a></li>
	<li><a target="_blank" href="https://plus.google.com/share?url=<?php echo esc_url( get_permalink() ); ?>"><span aria-hidden="true" class="icon-googleplus"></span></a></li>
</section>