Provides interface to `df -lP` and parses its result

Disk Utility for NodeJS

import { exec } from 'child_process';

class DiskService {
  getAvailableSpace = () => {
    /*
      Filesystem     1024-blocks    Used Available Capacity Mounted on
      /dev/root          3745600 2808444    752184      79% /
      devtmpfs            470116       0    470116       0% /dev
      tmpfs               474724       0    474724       0% /dev/shm
      tmpfs               474724   12228    462496       3% /run
      tmpfs                 5120       0      5120       0% /run/lock
      tmpfs               474724       0    474724       0% /sys/fs/cgroup
      /dev/mmcblk0p1       43539   22191     21348      51% /boot
      tmpfs                94944       0     94944       0% /run/user/0
    */

    exec('df -lP', (error, stdout, stderr) => {
      const rows     = stdout.trim().split('\n').map(item => item.replace(/\s+/g, ' ').split(' '));
      const dfResult = [];

      for (const row of rows.slice(1)) {
        dfResult.push({
          fileSystem : row[0],
          used       : row[2],
          available  : row[3],
          capacity   : row[4],
          mountedOn  : row[5],
        });
      }
      // console.log(JSON.stringify(dfResult, null, 2));

      return dfResult;
    });
  };
}

export const diskService = new DiskService();