Push a bitcode enabled app to test flight

[dnfield]

Now that Bitcode is available for Flutter apps, we'd like to measure what the store actually produces for an IPA.

@redbrogdon - could we create a build of Veggie Sessions or similar with bitcode enabled, publish it ot test flight, and measure it on some device(s)? I'd be happy to sit with you on this if it helps.

[dnfield]

In local testing, archiving hello_world with thinning for an iPhone 8+ results in a 4564K IPA, which is significantly smaller than our current 8791K. We just want to verify how that works in the store.

[dnfield]

/cc @mehmetf @tvolkert FYI

also @goderbauer since I'm sure app size is still near and dear to your heart :)

[goderbauer]

What do you mean by "in local testing"? Did you upload the IPK to Apple's Store console and get the download size numbers from there? Due to Apple's magic (app thining etc) that seems to be the only place that gives reliable numbers.

[dnfield]

I did a Developer build of the app with thinning and bitcode recompiilation to produce an IPA locally. It claims to do what the store does, but I don't fully trust it.

[dnfield]

This:

And then this:

[goderbauer]

Maybe upload it to apple and see if the numbers match? :)

[dnfield]

That's what this ticket is for - I can't do it myself because I don't have a developer key for any of our apps that are test flight elligible.

[dnfield]

I've updated https://github.com/flutter/flutter/wiki/Creating-an-iOS-Bitcode-enabled-app-(experimental) with some better instructions for this.

[redbrogdon]

@dnfield I remember testing a build of veggieseasons with you. Did that verify this issue, or was it something else?

[dnfield]

That was for something else unfortunately.

[redbrogdon]

I pushed a bitcode-enabled version of Veggie Seasons up to TestFlight:

#305

No warnings were received from iTunes/Apple, so I'm calling this one a win.