Academy
mediumDev Processes#87

EAS Build workflow

Prompt

Describe the EAS Build workflow for creating a production iOS build. List the commands from starting the build to distributing on TestFlight.

Solution

eas login                     # authenticate
eas build:configure           # create eas.json
eas build --platform ios      # start production build
eas build:list                # check build status
eas submit --platform ios     # submit to App Store Connect
# Then manage on App Store Connect -> TestFlight
Mentor's take

The process failure this prevents: the release build that only works on one developer's Mac. A hand-run Xcode archive depends on local certificates, provisioning profiles, and Xcode version — undocumented state that walks out the door with that laptop. EAS Build moves the build to managed cloud infrastructure with credentials stored server-side, so any team member (or CI) can produce a byte-identical production artifact from a clean checkout.

The pipeline is four verbs: eas build:configure writes eas.json, whose build profiles (development / preview / production) pin environment per artifact; eas build --platform ios queues the signed build; eas submit uploads it to App Store Connect; TestFlight handles tester distribution and staged rollout from there.

The trade-off to defend: you're renting Expo's build farm instead of maintaining a macOS runner fleet. You give up some control (build queue, machine images) and gain reproducibility, managed code signing, and zero Xcode-upgrade maintenance — for most teams that trade pays for itself the first time Apple bumps the required Xcode version.

Red flag: describing the Xcode Organizer archive-and-upload flow as your release process. That answer says your releases depend on a person, not a pipeline.

Say it: "My iOS release is eas build --platform ios on a production profile plus eas submit — credentials live in EAS, not on a laptop, so the pipeline is reproducible from any machine."