[nio] minor issue with project initialization

[Kirow]

New Issue Checklist

• Updated grpc-swift to the latest version
• I read the Contribution Guidelines
• I searched for existing GitHub issues(especially, there are many resolved issues related to SSL)

Issue Description

1. Clone and make xcode project file:

git clone -b nio https://github.com/grpc/grpc-swift.git
cd grpc-swift
make project

Error - No such file or directory -- fix-project-settings.rb (LoadError). This command should be removed from Makefile or fix-project-settings.rb should be restored.

2. Open project > Manage Scheme > add GRPC > build on iOS
   Error - Compiling for iOS 8.0, but module 'SwiftProtobuf' has a minimum deployment target of iOS 13.2. Manual change will helps of course, but it could be that there is a setting for this somewhere and it is possible to make it 8.0 during initialization.

Environment

Key
Value




OS Version
10.14.6


Swift Version
5.1.3


Xcode Version
11.3


gRPC-Swift Version
nio



  

[glbrntt]

Thanks for filing this @Kirow.

With regards to the second, I think the appropriate fix here is adding platform availability the Package.swift. Just as an FYI, the minimum supported iOS version should be 10.0 (this the minimum version of iOS supported by SwiftNIO).

I'll file a couple of PRs to address these.

[glbrntt]

One other thing in case you didn't know, with Xcode 11 you don't need to generate an .xcodeproj (if you're only using SwiftPM). You can either open the grpc-swift directory from Xcode or you can run xed . from the grpc-swift directory.

[Kirow]

Yes, I tried Xcode11 SwiftPM and it worked well, but not so well in AppCode that I'm using. So I need to use git submodules or cocoapods while there is no good support in the IDE.

[glbrntt]

This should've been fixed by #695 -- please reopen if it isn't!