addcommand.js

const {Command, flags} = require('@oclif/command')
const Weight = require('../api/weight')
const weight = new Weight()
class AddCommand extends Command {
  
  async run() {
    const {args} = this.parse(AddCommand)
    const newWeight = args.weight
    weight.add(newWeight)
    this.log(`new weight ${newWeight} kg added`)
  }
}
AddCommand.description = "add a new record of weight"
AddCommand.args = [{
  name: "weight",
  description: "current weight in kilograms; insert only the value, omit kg",
  required: true
}]  
module.exports = AddCommand