Parse typescript file to get exported const variables

Question

Is there a way to parse the environment.ts file from a .js file?

export const environment = {
    ...,
    production: false,
    ...
}; 

something like

beforePrepare.js

module.exports = function (ctx) {
    let environmet = TOOL.parse(src/environments/environment.ts);
    console.log(environment); --> PRINT {..., production: false, ...}
}

Could a regex also do the work?

I need this to implement a cordova hook

Answer 1

A regex can be used as a quick-and-dirty solution:

const s = `
// Some comment
export const environment = {
  production: false,
  apiUrl: 'http://my-api-url',
  testUser: {
    name: 'John Doe',
    age: 25
  }
};
export const otherStuff = {
  answer: 42
};
`;

const regex = /export const environment = (\{[^;]*\});/m;
const match = regex.exec(s);
const environment = eval(`(${match[1]})`);
console.log(environment);

For more complex cases you need a TypeScript parser.