Clear 'wp_core_block_css_files' transient on theme activation and refresh

[joemaller]

For some reason the wp_core_block_css_files is persisting and preventing the loading of some styles. This has resulted in visual discrepancies between development and production deploys, despite identical code.

Initial thinking is to add the following:

• Delete the transient from the after_switch_theme hook, likely as part of ideasonpurpose/wp-theme-init
• Add wp-cli transient delete wp_core_block_css_files to the bootstrap script
• Delete the transient directly from the wp_options table when running theme-activate

See also WordPress#59111

Note that wp-config.php hacks didn't work easily, (see #71) and adding define( 'WP_DEVELOPMENT_MODE', 'core' ); didn't fix this issue anyway (as suggested here)

[joemaller]

Delete the transient directly from the DB table:

DELETE FROM `wp_options` WHERE option_name = '_transient_wp_core_block_css_files';

wp-cli command:

wp --allow-root transient delete wp_core_block_css_files

[joemaller]

Delete the transient on theme-activation:

add_action('after_switch_theme', function () {
    delete_transient('wp_core_block_css_files');
});

[joemaller]

Escaped shell command from docker-compose.yml:

echo -e "🐛  \033[36mClearing buggy \033[90mwp_core_block_css_files \033[36mtransient\033[0m" &&
mariadb -h db $${MYSQL_DATABASE} \
    -e "DELETE FROM wp_options \
        WHERE option_name = \"_transient_wp_core_block_css_files\"" &&

[joemaller]

We should probably nuke all transients on activation. A reasonable dev expectation to starting work on a project would be a clean transient state. Spinning down/up a project would also be a fast alternative to clearing transients, if the Transients Manager plugin isn't installed.

[joemaller]

Actual solution is to set WP_DEVELOPMENT_MODE to 'theme' as described here: Configuring development mode in 6.3.

Acutal code is in /wp-includes/class-wp-theme.php

	public function get_block_patterns() {
		$can_use_cached = ! wp_is_development_mode( 'theme' );


		$pattern_data = $this->get_pattern_cache();
		if ( is_array( $pattern_data ) ) {
			if ( $can_use_cached ) {
				return $pattern_data;
			}
			// If in development mode, clear pattern cache.
			$this->delete_pattern_cache();
		}