This folder contains hermetic scripts to re-build the app using a distribution profile and then deploy to TestFlight.
This is done using the FastLane tool suite.
Deployment can be done manually by Googlers by following go/flutter-gallery-publish (internal doc).
Deployment is automatically done by Cirrus on tagged branch commits.
In case the distribution certifcate expires, for example, this error message occured: “Your certificate ... is not valid, please check end date and renew it if necessary”, a Googler can renew it by following the instructions at http://go/googler-flutter-signing#how-to-renew.