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// eslint-disable-next-line unicorn/prefer-top-level-await
const nativePromisePrototype = (async () => {})().constructor.prototype;
const descriptors = ['then', 'catch', 'finally'].map(property => [
property,
Reflect.getOwnPropertyDescriptor(nativePromisePrototype, property),
]);
// The return value is a mixin of `childProcess` and `Promise`
export const mergePromise = (spawned, promise) => {
for (const [property, descriptor] of descriptors) {
// Starting the main `promise` is deferred to avoid consuming streams
const value = typeof promise === 'function'
? (...args) => Reflect.apply(descriptor.value, promise(), args)
: descriptor.value.bind(promise);
Reflect.defineProperty(spawned, property, {...descriptor, value});
}
};
// Use promises instead of `child_process` events
export const getSpawnedPromise = spawned => new Promise((resolve, reject) => {
spawned.on('exit', (exitCode, signal) => {
resolve({exitCode, signal});
});
spawned.on('error', error => {
reject(error);
});
if (spawned.stdin) {
spawned.stdin.on('error', error => {
reject(error);
});
}
});
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