import {promisify} from 'node:util';
import childProcess from 'node:child_process';
import parseColumns from 'parse-columns';
const execFileP = promisify(childProcess.execFile);
const {stdout} = await execFileP('df', ['-kP']);
console.log(parseColumns(stdout, {
	transform: (item, header, columnIndex) => {
		// Coerce elements in column index 1 to 3 to a number
		if (columnIndex >= 1 && columnIndex <= 3) {
			return Number(item);
		}
		return item;
	}
}));
/*
[
	{
		Filesystem: '/dev/disk1',
		'1024-blocks': 487350400,
		Used: 467528020,
		Available: 19566380,
		Capacity: '96%',
		'Mounted on': '/'
	},
	…
]
*/