What are "Tier 2+ platforms (Cygwin, etc)"? #10239

Oneechan69 · 2024-01-20T13:36:47Z

Oneechan69
Jan 20, 2024

The RIIR page says "As of yet unknown compatibility story for Tier 2+ platforms (Cygwin, etc)."

Answered by faho

We've never formally defined which operating systems we support, but in practice it works out something like this:

"Tier 1": Platforms multiple core contributors run as their main system and that are tested in CI - this is Linux (with glibc) and macOS, possibly WSL (no real CI, but it's basically linux)
"Tier 1.5": Platforms that have CI and that contributors may sometimes run - this is FreeBSD
"Tier 2": Everything else that we know fish runs on - this is Cygwin, OpenBSD, NetBSD, Solaris/Illumos/OpenIndiana, Haiku. You can divide this up further if you want - the two BSDs are a heck of a lot closer to FreeBSD and so will probably work better as a consequence than the rest.

So that "Tier…

faho · 2024-01-20T14:29:15Z

We've never formally defined which operating systems we support, but in practice it works out something like this:

"Tier 1": Platforms multiple core contributors run as their main system and that are tested in CI - this is Linux (with glibc) and macOS, possibly WSL (no real CI, but it's basically linux)
"Tier 1.5": Platforms that have CI and that contributors may sometimes run - this is FreeBSD
"Tier 2": Everything else that we know fish runs on - this is Cygwin, OpenBSD, NetBSD, Solaris/Illumos/OpenIndiana, Haiku. You can divide this up further if you want - the two BSDs are a heck of a lot closer to FreeBSD and so will probably work better as a consequence than the rest.

So that "Tier 2+" was a bit of a shorthand for "platforms we don't really regularly test".

The term is, I believe, borrowed from rustc's support list.

1 reply

I read it as literally meaning the Rust platform support list.