convert JSON to .env file

main.js

const readline = require('readline');
const fs = require('fs');
const path = require('path');

// this function will convert json file to .env
// USAGE:
// => node ./scripts/json_to_env.js env.json
function main() {
    const args = process.argv;
    if (args.length <= 2) {
        console.log('required json file argument');
        process.exit(1);
    }

    const jsonFileArg = args[2];
    const cwd = process.cwd();
    const jsonPath = path.join(cwd, jsonFileArg);

    if (!fs.existsSync(jsonPath)) {
        console.log('json file does not exist');
        process.exit(1);
    }

    const envOut = path.join(cwd, `${jsonFileArg}.env`);

    try {
        const outStream = fs.createWriteStream(envOut);
        
        fs.readFile(jsonPath, (err, data) => {
            if (err) {
                console.log(err);
                process.exit(1);
            }
    
            const jsonData = JSON.parse(data.toString('utf8'));
    
            for (const k in jsonData) {
                const line = `${k}=${jsonData[k]}`;
                outStream.write(line);
                outStream.write('\n');
            }

            outStream.end();
        });

    } catch(err) {
        console.log(err);
        process.exit(1);
    }

}

main();