Building IPA files for the simulator

[fastlanebot]

Original issue by @ide - Imported from fastlane/gym#98

One of our use cases for fastlane is to build IPA files for the simulator. We currently do this from the command line and it is quite simple, but we weren't able to use gym.

If this is something you'd like to support in gym, here are the main things that are different for a simulator build:

• We didn't need to sign the IPA (this worked fine by leaving out provisioning_profile_path)
• We needed to pass the -arch i386 option and ONLY_ACTIVE_ARCH=NO (this worked fine via xcargs)
• Needed to exclude the -destination and -archivePath options
• The xcodebuild action should be build instead of archive

[fastlanebot]

@KrauseFx commented

Correct me if I'm wrong, but building for the simulator is just one xcodebuild command and doesn't involve any workarounds to get everything working with Swift, etc.

What's the benefit of using gym then?

[fastlanebot]

@ide commented

Yeah. It's just one command. If you think it complicates gym we'll use exec instead.

[fastlanebot]

@KrauseFx commented

Okay cool 👍 You can easily just use your own local action using fastlane new_action and when everything works submit a pull request with the new action 🚀