Implement Swift support in buildsystem for iOS and macOS builds

[theromis]

Describe the project you are working on

My current project Jumpy Arcade

Describe the problem or limitation you are having in your project

After latest update SKStoreReviewController is removed from build (using it to rate app) so build is just fails, temporarily removed this call.
In last xcode it replaced by
AppStore.requestReview(in: scene)
but it exists only in SWIFT, so right now is just impossible to use this feature
https://forums.developer.apple.com/forums/thread/759918

Describe the feature / enhancement and how it helps to overcome the problem or limitation

All Apple current staff comes to swift only

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

Just build SWIFT using SCONS

If this enhancement will not be used often, can it be worked around with a few lines of script?

Sounds like all code will finally switch to swift

Is there a reason why this should be core and not an add-on in the asset library?

Unfortunately swift is core build.

[AThousandShips]

Just build SWIFT using SCONS

Please explain a bit more what you mean, how would this be done?

[lupuchard]

Is SwiftGodot what you're looking for?

[theromis]

@lupuchard unfortunately not, I need ability to build swift code as part of godot scons build (platform or modules folder)

[theromis]

@AThousandShips According to this SCons/scons#4616 (comment) we can add swift here https://github.com/SCons/scons-contrib/tree/master/sconscontrib/SCons/Tool and use it as external build tool

[theromis]

PR created SCons/scons-contrib#53
this tool can be located inside godot repo godot_root/site_scons/site_tools/swift
and from there SConstruct will looks like this

env = Environment(tools=['default','swift'])
env.Swift('hello')