Dominik Schilling

/**
 * Removes plugins under version control from update checks.
 *
 * @param array  $request  An array of HTTP request arguments.
 * @param string $url     The request URL.
 * @return $array An array of HTTP request arguments.
 */
add_filter( 'http_request_args', function( $request, $url ) {
	if ( false === strpos( $url, 'api.wordpress.org/plugins/update-check' ) ) {
		return $request;
	}

	$vcs_dirs = [ '.git', '.svn', '.hg', '.bzr' ];

	$plugins = json_decode( $request['body']['plugins'] );
	foreach ( array_keys( (array) $plugins->plugins ) as $plugin ) {
		$plugin_dir = WP_PLUGIN_DIR . '/' . dirname( $plugin ) . '/';

		// Search directory for evidence of version control.
		foreach ( $vcs_dirs as $vcs_dir ) {
			if ( is_dir( $plugin_dir . $vcs_dir ) ) {
				// Remove plugin from the update check.
				unset( $plugins->plugins->$plugin );
				break;
			}
		}
	}

	$request['body']['plugins'] = wp_json_encode( $plugins );

	return $request;
}, 10, 2 );