buck2

I suspect they just use no_std whenever its applicable https://github.com/facebook/buck2/commit/4a1ccdd36e0de0b69ee... https://github.com/facebook/buck2/commit/bee72b29bc9b67b59ba... Turn out if you have strong control over the compiler and linker instrumentations, there are a lot of ways to optimize binary size

Sapling is actively developed, not "dead after 3 months": https://github.com/facebook/sapling/commits/main/ Have not tried building Buck2 (no personal use for it), but its also actively developed: https://github.com/facebook/buck2/commits/main/

Allegedly it has an LSP and vscode support but I also have never used either. https://github.com/facebook/buck2/tree/main/starlark-rust/vs...

> examples As it may be that people don't find them, the official ones are in `examples` https://github.com/facebook/buck2/tree/main/examples language examples in `examples/with_prelude` https://github.com/facebook/buck2/tree/main/examples/with_pr... There is a minmal Go example too: https://github.com/facebook/buck2/tree/main/examples/with_pr... More "real world" examples are dtolnay's CXX for Rust and C++ interop: https://github.com/dtolnay/cxx and my own ones (sorry to link these again, but I do not know of any others): C++ with Vcpkg: https://github.com/Release-Candidate/Cxx-Buck2-vcpkg-Example... C++ with Conan: https://github.com/Release-Candidate/Cxx-Buck2-Conan-Example... OCaml: https://github.com/Release-Candidate/OCaml-Buck-2-Examples

It looks like Go is starting to get better support in buck2 - see https://github.com/facebook/buck2/issues/455

> More and more I lean towards using bazel or gn/ninja for fresh Rust projects, and walk away from cargo & crates entirely. I would suggest Buck2 (which is written in Rust, so you can use the existing tooling to build it) https://buck2.build/ https://github.com/facebook/buck2 Rust support is also rather good ;) https://github.com/facebookincubator/reindeer But you need "fixups" to get many cargo packages to work with Buck 2: https://github.com/facebook/buck2/tree/main/shim/third-party...

Note that Meta recently added a Julia ruleset to its buck2 prelude set. An important step toward working with Julia on prod environments. https://github.com/facebook/buck2/tree/main/prelude/julia

There are a few references to NixOS on the code/issues.[0] I wonder what Meta's use case is for NixOS. [0] https://github.com/facebook/buck2/search?q=nixos&type=issues

The fact that Buck2 is written in a statically-compilable language is compelling, compared to Bazel and others. It's also great that Windows appears to be supported out of the box [1,1a] -- and even tested in CI. I'm curious how much "real world" usage it's gotten on Windows, if any. I don't see many details about the sandboxing/hermetic build story in the docs, and in particular whether it is supported at all on Linux or Windows (the only mention in the docs is Darwin). It's a good sign that the Conan integration PR [2] was warmly received (if not merged, yet). I would hope that the system is extensible enough to allow hooking in other dependency managers like vcpkg. Using an external PM loses some of the benefits, but it also dramatically reduces the level of effort for initial adoption. I think bazel suffered from the early difficultie

If you want something similar thats written in Rust instead of Java, look at Buck2 https://github.com/facebook/buck2