The (immediate) future of Go on FreeBSD

Hi everyone,

PR 285952 proposes overhauling the Go framework to align with how the
toolchain system works (since 1.21).

Basically, what I'm proposing is:
* Delete all versioned go ports (lang/go121, lang/go122, etc.)
* lang/go is the current release, and that's the ONLY release we provide
(we don't have devel releases right now, but we CAN still could use
go-devel under this proposal)
* Go natively respects the toolchain specification in go.mod, so there's no
difference between building a "go 1.22" app in 1.22, 1.23, or 1.24
* USES=go:1.xyz will forcibly pin the toolchain to 1.xyz (only for old
ports that rely on soft-deprecated features or behavior and can't otherwise
be patched

As a reminder, Go's toolchain semantics are that if an app has:
  go.mod:
      go 1.23

Then go < 1.23 will download 1.23 sources and compile the entire toolchain,
then use it to build the app.

Similarly, go >= 1.23 will compile using the installed toolchain, but will
disable any features newer than 1.23.

The end-user impact should essentially be nil. We could continue to provide
versioned ports if people need them, but I can't see any benefit to using
them to build go apps. Go 1.24, 1.25, and 1.1000 should all compile a
1.23-specified app identically.

I'm really interested to hear your thoughts, concerns, ideas, etc.!


-- 
Adam Weinberger
adamw@adamw.org