VS Code Live Share is a pretty sweet way to remote pair. It supports Shared Servers, a fancy way to forward ports without exchanging
ssh keys. Unlike
ssh port forwarding, however, there isn’t a way for the joiner to choose which of their local ports will be used. The port selection is random.
That doesn’t cut it with Expo Go (and maybe vanilla react-native?) which demands the port be the same for the server and the client. So I looked for a way to forward one port on my local machine, the random one chosen by Live Share, to another port on my machine - the expo default of 19000.
Thanks to socat that was easy:
socat tcp-listen:19000,reuseaddr,fork tcp:localhost:<random liveshare port>
exp://localhost:19000 in Expo Go in the simulator. 🤘 Sweet.