Posts, Post Types: Introduce edit_post_{$post->post_type} hook.

The hook fires before the general `edit_post` hook and has the same parameters.

It also complements the `save_post_{$post->post_type}` hook added in [25050].

Props Mte90, garrett-eclipse.
Fixes #34706.

git-svn-id: https://develop.svn.wordpress.org/trunk@43535 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-customize-manager.php

@@ -2988,6 +2988,9 @@ final class WP_Customize_Manager {
 		$post->post_status = $new_status;
 		wp_transition_post_status( $new_status, $old_status, $post );
 
+		/** This action is documented in wp-includes/post.php */
+		do_action( "edit_post_{$post->post_type}", $post->ID, $post );
+
 		/** This action is documented in wp-includes/post.php */
 		do_action( 'edit_post', $post->ID, $post );
 

src/wp-includes/comment.php

@@ -2471,6 +2471,10 @@ function wp_update_comment_count_now( $post_id ) {
 	 * @param int $old     The old comment count.
 	 */
 	do_action( 'wp_update_comment_count', $post_id, $new, $old );
+
+	/** This action is documented in wp-includes/post.php */
+	do_action( "edit_post_{$post->post_type}", $post_id, $post );
+
 	/** This action is documented in wp-includes/post.php */
 	do_action( 'edit_post', $post_id, $post );
 

src/wp-includes/post.php

@@ -3796,6 +3796,19 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	}
 
 	if ( $update ) {
+		/**
+		 * Fires once an existing post has been updated.
+		 *
+		 * The dynamic portion of the hook name, `$post->post_type`, refers to
+		 * the post type slug.
+		 *
+		 * @since 5.0.0
+		 *
+		 * @param int     $post_ID Post ID.
+		 * @param WP_Post $post    Post object.
+		 */
+		do_action( "edit_post_{$post->post_type}", $post_ID, $post );
+
 		/**
 		 * Fires once an existing post has been updated.
 		 *
@@ -3805,6 +3818,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 		 * @param WP_Post $post    Post object.
 		 */
 		do_action( 'edit_post', $post_ID, $post );
+
 		$post_after = get_post( $post_ID );
 
 		/**
@@ -3950,6 +3964,9 @@ function wp_publish_post( $post ) {
 	$post->post_status = 'publish';
 	wp_transition_post_status( 'publish', $old_status, $post );
 
+	/** This action is documented in wp-includes/post.php */
+	do_action( "edit_post_{$post->post_type}", $post->ID, $post );
+
 	/** This action is documented in wp-includes/post.php */
 	do_action( 'edit_post', $post->ID, $post );