Parse fstab

index.js

/**
 * Parse fstab from either string (from file) or an array of lines
 * @author Anders Evenrud <[email protected]>
 * @license MIT
 */
const parse = input => (input instanceof Array ? input : input.split('\n'))
  .map(line => line.replace(/\s+/g, ' ').replace(/(\s+)?,(\s+)?/g, ',').trim())
  .filter(line => line.length > 0 && line.substring(0) !== '#')
  .map(line => line.split(/\s/g))
  .map(([dev, dir, type, options, dump, fsck]) => ({
    dev,
    dir,
    type,
    options: options.split(','),
    dump: parseInt(dump, 10),
    fsck: parseInt(fsck, 10)
  }))

module.exports = {
  parse
}

index.test.js

const { parse } = require('./index')

describe('Parse fstab', () => {
  test('should parse multiple lines without failure', () => {
    const result = parse([
      '/dev/sda / ext4 noatime 0 1',
      '/dev/sdb /home ext2 noatime,ro 1 1',
      '/dev/sdc             /tmp        ntfs      noatime, auto , rw   0   0  '
    ])

    expect(result).toEqual([
      {
        dev: '/dev/sda',
        dir: '/',
        type: 'ext4',
        dump: 0,
        fsck: 1,
        options: ['noatime']
      },
      {
        dev: '/dev/sdb',
        dir: '/home',
        type: 'ext2',
        dump: 1,
        fsck: 1,
        options: ['noatime', 'ro']
      },
      {
        dev: '/dev/sdc',
        dir: '/tmp',
        type: 'ntfs',
        dump: 0,
        fsck: 0,
        options: ['noatime', 'auto', 'rw']
      },
    ])
  })
})