const is = require('./is.js')
const { dirname } = require('path')
module.exports = async ({ cwd = process.cwd(), root } = {}) => {
while (true) {
if (await is({ cwd })) {
return cwd
}
const next = dirname(cwd)
if (cwd === root || cwd === next) {
return null
}
cwd = next
}
}