_s: Simplify author template.

Set up author data for the author template immediately, rather than
waiting for the first the_post() call.
This removes the need to call the_post() and rewind_posts() in an
author template to print information about the author.

Fixes Automattic#346.

archive.php

@@ -24,16 +24,7 @@
 							single_tag_title();
 
 						elseif ( is_author() ) :
-							/* Queue the first post, that way we know
-							 * what author we're dealing with (if that is the case).
-							*/
-							the_post();
 							printf( __( 'Author: %s', '_s' ), '<span class="vcard">' . get_the_author() . '</span>' );
-							/* Since we called the_post() above, we need to
-							 * rewind the loop back to the beginning that way
-							 * we can run the loop properly, in full.
-							 */
-							rewind_posts();
 
 						elseif ( is_day() ) :
 							printf( __( 'Day: %s', '_s' ), '<span>' . get_the_date() . '</span>' );

inc/extras.php

@@ -66,3 +66,24 @@ function _s_wp_title( $title, $sep ) {
 	return $title;
 }
 add_filter( 'wp_title', '_s_wp_title', 10, 2 );
+
+/**
+ * Sets the authordata global when viewing an author archive.
+ *
+ * This provides backwards compatibility with
+ * http://core.trac.wordpress.org/changeset/25574
+ *
+ * It removes the need to call the_post() and rewind_posts() in an author
+ * template to print information about the author.
+ *
+ * @global WP_Query $wp_query WordPress Query object.
+ * @return void
+ */
+function _s_setup_author() {
+	global $wp_query;
+
+	if ( $wp_query->is_author() && isset( $wp_query->post ) ) {
+		$GLOBALS['authordata'] = get_userdata( $wp_query->post->post_author );
+	}
+}
+add_action( 'wp', '_s_setup_author' );