nodeUtils.js

import fs from 'fs'

export function writeFileSyncRecursive(filename, content, charset) {
	// -- normalize path separator to '/' instead of path.sep,
	// -- as / works in node for Windows as well, and mixed \\ and / can appear in the path
	let filepath = filename.replace(/\\/g, '/')

	// -- preparation to allow absolute paths as well
	let root = ''
	if (filepath[0] === '/') {
		root = '/'
		filepath = filepath.slice(1)
	} else if (filepath[1] === ':') {
		root = filepath.slice(0, 3) // c:\
		filepath = filepath.slice(3)
	}

	// -- create folders all the way down
	const folders = filepath.split('/').slice(0, -1) // remove last item, file
	folders.reduce(
		(acc, folder) => {
			const folderPath = acc + folder + '/'
			if (!fs.existsSync(folderPath)) {
				fs.mkdirSync(folderPath)
			}
			return folderPath
		},
		root // first 'acc', important
	)

	// -- write file
	fs.writeFileSync(root + filepath, content, charset)
}