add 'swift'

[krzyzanowskim]

Vendored Swift packages for Darwin and Linux; however, the Linux platform is disabled for now due to platform requirement: ubuntu 22.04. Unless somebody can make it run tests on Ubuntu

[mxcl]

Great job

[mxcl]

Ideally we’d avoid resigning this since Apple signed it.

Also: I assume we have license to redistribute, but one day we may find out we didn’t.

[krzyzanowskim]

I assume we have license to redistribute

since it is downloaded by the user from the https://swift.org it's not really distributed by pkgx, or is it?

[mxcl]

It is distributed by us. The build script runs on our infra to convert everything into bottles that pkgx then downloads from our hosting.

[krzyzanowskim]

right, I assume it all is under Apache 2.0 as it states on https://www.swift.org/download/ let's assume that ;)

[krzyzanowskim]

@mxcl I'd like you to weigh in on Linux support. I lack the skills how to make it "per distribution" only for a vendored package

[mxcl]

@krzyzanowskim distributions for a specific hardware platform are (almost always) just variations on underlying deps. So if Apple provide a swift for ubuntu where the ubuntu glibc matches our requirements (v23 I think) then it'll be fine. We provide the other dependencies and it should just work at runtime.

Failing that we have to build from source.

Though once we finish packaging glibc (#147) that issue could also be alleviated.

Important

I say all this but distributions can do bad things with underlying dependencies that cause binaries built for them to
become extremely specific. Off hand I don't recall ever seeing this, but I'm sure it has happened.