List installed @wordpress/* package in your wp-calypso repo

list_wp_packages.js

const globby = require( 'globby' );
const fs = require( 'fs' );

function list_dirs( glob ) {
	return globby.sync( glob, { onlyDirectories: true } );
}

const dirs = [ '.', './client', ...list_dirs( './apps/*' ), ...list_dirs( './packages/*' ) ];

function pkg_name( dir ) {
	const parts = dir.split( '/' );
	const name = parts[ parts.length - 1 ];
	const ns = parts[ parts.length - 2 ];
	if ( ns.startsWith( '@' ) ) {
		return ns + '/' + name;
	}
	return name;
}

function dir_name( dir ) {
	const parts = dir.split( '/' );
	return parts[ parts.length - 1 ];
}

function is_symlink( dir ) {
	return fs.lstatSync( dir ).isSymbolicLink();
}

function is_wp_package( name ) {
	return /^@wordpress\/.+/.test( name );
}

function* pkg_dirs( dir ) {
	for ( const pkg_dir of list_dirs( dir + '/node_modules/*' ) ) {
		if ( dir_name( pkg_dir ).startsWith( '@' ) ) {
			for ( const ns_dir of list_dirs( pkg_dir + '/*' ) ) {
				yield ns_dir;
			}
		} else {
			yield pkg_dir;
		}
	}
}

const found_pkgs = new Map();

function add_pkg( name, version, dir ) {
	let record = found_pkgs.get( name );
	if ( ! record ) {
		record = [];
		found_pkgs.set( name, record );
	}
	record.push( { version, dir } );
}

function trav_dir( dir ) {
	for ( const pkg_dir of pkg_dirs( dir ) ) {
		if ( is_symlink( pkg_dir ) ) {
			continue;
		}

		const name = pkg_name( pkg_dir );
		if ( is_wp_package( name ) ) {
			const pkg_json = JSON.parse( fs.readFileSync( pkg_dir + '/package.json' ) );
			add_pkg( name, pkg_json.version, dir + '/node_modules' );
		}
		trav_dir( pkg_dir );
	}
}

for ( const dir of dirs ) {
	trav_dir( dir );
}

const entries = Array.from( found_pkgs.entries() );
entries.sort( ( a, b ) => b[ 1 ].length - a[ 1 ].length );
for ( const [ name, list ] of entries ) {
	if ( list.length < 2 ) {
		continue;
	}
	console.log( name );
	for ( const { version, dir } of list ) {
		console.log( '  ' + version + ' in ' + dir );
	}
}