Is there a helper to generate a sequence of port numbers to try?

Question

RepoPilot · Accepted Answer

Yes, there is a helper function called `portNumbers()` to generate a sequence of port numbers in a specified range.

The `portNumbers(from, to)` function generates port numbers in the given range from `from` to `to` (inclusive). It returns an `Iterable` for port numbers, which can be passed to the `port` option of `getPort()`.

Here's how it works:

```js
import getPort, {portNumbers} from 'get-port';

console.log(await getPort({port: portNumbers(3000, 3100)}));
// Will use any port from 3000 to 3100, otherwise fall back to a random port
```

The function is defined in [index.js:L169-L194] and validates that both `from` and `to` are:
- Integer numbers
- Within the range `1024` to `65535`
- With `to` being greater than or equal to `from`

It uses a generator function to yield each port number sequentially in the range [index.js:L184-L187].

FOLLOW_UPS:
- How does getPort fall back if all preferred ports are unavailable?
- What happens if I pass an invalid range to portNumbers?
- Can I exclude specific ports from the available ports?