app.js

const yargs = require("yargs");
const geocode = require("./geocode/geocode");
const weather = require("./weather/weather");

const argv = yargs
    .options({
        a:{
            demand:true,
            alias:'address',
            describe:'Address to fetch weather for',
            string:true
        }
    })
    .help()
    .alias('help','h')
    .alias('version','v')
    .argv;

geocode.geocodeAddressFunc(argv.a,(errorMessageGeocode, locationData) =>{
    if(errorMessageGeocode){
        console.log(errorMessageGeocode);
    }else{
        weather.weatherDetails(locationData, (errorMessageWeather, weatherDate) => {
            if(errorMessageWeather){
                console.log(errorMessageWeather);
            }
            else{
                console.log(JSON.stringify(weatherDate, undefined,2));
            }
        });
    }
});