debian-mirror-gitlab/config/helpers/evaluate_module_from_source.js
2022-10-11 01:57:18 +05:30

37 lines
951 B
JavaScript

const vm = require('vm');
/**
* This function uses Node's `vm` modules to evaluate the `module.exports` of a given source string
*
* Example:
*
* ```javascript
* const { exports: moduleExports } = evaluateModuleFromSource("const foo = 7;\n module.exports.bar = 10 + foo;");
*
* assert(moduleExports.bar === 17);
* ```
*
* @param {String} source to be evaluated using Node's `vm` modules
* @param {{ require: Function }} options used in the context during evaluation of the Node module
* @returns {{ exports: any }} exports added to the script's `module.exports` context
*/
const evaluateModuleFromSource = (source, { require } = {}) => {
const context = {
module: {
exports: {},
},
require,
};
try {
const script = new vm.Script(source);
script.runInNewContext(context);
} catch (e) {
console.error(e);
throw e;
}
return context.module;
};
module.exports = { evaluateModuleFromSource };