Heroku Copy Environment Variable from one app to another

copy-heroku-env.js

// Usage: node copy-heroku-env.js sourceAppName targetAppName
// Requires heroku cli to be installed - https://devcenter.heroku.com/articles/heroku-cli#install-the-heroku-cli

const { execSync } = require('child_process');

const args = process.argv;

const source = process.argv[process.argv.length - 2];
const target = process.argv[process.argv.length - 1];

console.log(source, target);

const configGet = execSync(`heroku config --app ${source} -j`);

try {
    const config = JSON.parse(configGet.toString());
    
    const set = Object.keys(config).map((key) => {
        const value = config[key];
        return `"${key}=${value}"`;
    }).join(' ');
    
    execSync(`heroku config:set ${set} --app "${target}"`, {stdio: 'inherit'})
    
    console.info('Finished');
} catch (e) {
    console.error(e)
    console.info(configGet.toString());
}