recursion-test.php

<?php

global $start_time;

function log_message( $message ) {
	global $start_time;
	$elapsed_time = microtime( true ) - $start_time;
	WP_CLI::log( sprintf( '[%s] %s', format_log_timestamp( $elapsed_time ), $message ) );
}

function format_log_timestamp( $s ) {
	$h = floor( $s / 3600 );
	$s -= $h * 3600;
	$m = floor( $s / 60 );
	$s -= $m * 60;
	return $h . ':' . sprintf( '%02d', $m ) . ':' . sprintf( '%02d', $s );
}

function recurse_directory( $path, $type ) {

	$ignored_paths = array(
		// System directories
		'/.ssh/',
		'/.git/',
		'/.svn/',
		'/.subversion/',
		'/__MACOSX/',
		// Webserver directories
		'/cache/',
		'/logs/',
		'/debuglogs/',
		'/Maildir/',
		'/tmp/',
		// Generic application directories
		'/uploads/',
		'/themes/',
		'/plugins/',
		'/modules/',
		// Dependency management
		'/node_modules/',
		'/bower_components/',
		'/vendor/',
		// Already in a WordPress install
		'/wp-admin/',
		'/wp-content/',
	);
	foreach( $ignored_paths as $ignored_path ) {
		if ( false !== stripos( $path, $ignored_path ) ) {
			log_message( "Matched ignored path. Skipping recursion into '{$path}'" );
			return;
		}
	}

	log_message( "Recusing into '{$path}'" );
	if ( 'php' === $type ) {
		$iterator = new RecursiveDirectoryIterator( $path, FilesystemIterator::SKIP_DOTS );
		foreach( $iterator as $file_info ) {
			if ( $file_info->isDir() ) {
				recurse_directory( $file_info->getPathname(), $type );
			}
		}
	} elseif ( 'find' === $type ) {
		$directories = trim( shell_exec( 'find ' . escapeshellarg( $path ) . ' -mindepth 1 -maxdepth 1 -type d' ) );
		if ( empty( $directories ) ) {
			return;
		}
		foreach( explode( PHP_EOL, $directories ) as $dir ) {
			recurse_directory( $dir, $type );
		}
	}
};

$start_time = microtime( true );
recurse_directory( realpath( $args[0] ), 'php' );
$end_time = microtime( true ) - $start_time;
log_message( 'PHP recursion complete' );

$start_time = microtime( true );
recurse_directory( realpath( $args[0] ), 'find' );
$end_time = microtime( true ) - $start_time;
log_message( 'find recursion complete' );