set-latest-wp-version.js

const fs = require( 'fs' );
const fetch = require( 'node-fetch' );
const wpEnv = require( './.wp-env.json' );

fetch( 'https://api.wordpress.org/core/stable-check/1.0/' )
	.then( ( res ) => res.json() )
	.then( ( json ) => {
		const wpVersion = Object.keys( json )[ Object.keys( json ).length - 1 ];
		wpEnv.core = `WordPress/WordPress#tags/${ wpVersion }`;
		fs.writeFile(
			'./.wp-env.json',
			JSON.stringify( wpEnv, null, 2 ),
			'utf8',
			( err ) => {
				if ( err ) {
					console.log(
						'An error occurred while writing latest WordPress version to .wp-env.json file.'
					);
					return console.log( err );
				}
				console.log(
					`The .wp-env.json file was updated with the latest WordPress version (${ wpVersion }).`
				);
			}
		);
	} );