Undecided if there’s a greater solution to do it, however you should use the theme_<publish sort>_templates filter so as to add your customized template to the “Template” dropdown, after which use the template_include filter to make sure the proper file is loaded.
So one thing like this could work:
add_filter( 'template_include', 'my_events_template_include' );
perform my_events_template_include( $template ) {
if ( 'occasions' === get_post_type() ) {
$file = plugin_dir_path( __FILE__ ) . 'templates/single-events.php';
return ( $file === get_page_template_slug() ) ? $file : $template;
}
return $template;
}
add_filter( 'theme_events_templates', 'my_plugin_theme_events_templates' );
perform my_plugin_theme_events_templates( $post_templates ) {
$file = plugin_dir_path( __FILE__ ) . 'templates/single-events.php';
$post_templates[ $file ] = __( 'Single Occasions', 'your-text-domain' );
return $post_templates;
}
Notice: The array key of $post_templates must be a file title/path relative to the energetic theme listing, however since we’re utilizing a full filesystem path, then we had to make use of the template_include filter to load the proper file from the plugin listing.
