Even before the Bcachefs file-system driver was accepted into the mainline kernel, Debian for the past five years has offered a "bcachefs-tools" package to provide the user-space programs to this copy-on-write file-system. It was simple at first when it was simple C code but since the Bcachefs tools transitioned to Rust, it's become an unmaintainable mess for stable-minded distribution vendors. As such the bcachefs-tools package has now been orphaned by Debian.
From John Carter's blog, Orphaning bcachefs-tools in Debian:
"So, back in April the Rust dependencies for bcachefs-tools in Debian didn’t at all match the build requirements. I got some help from the Rust team who says that the common practice is to relax the dependencies of Rust software so that it builds in Debian. So errno, which needed the exact version 0.2, was relaxed so that it could build with version 0.4 in Debian, udev 0.7 was relaxed for 0.8 in Debian, memoffset from 0.8.5 to 0.6.5, paste from 1.0.11 to 1.08 and bindgen from 0.69.9 to 0.66.
I found this a bit disturbing, but it seems that some Rust people have lots of confidence that if something builds, it will run fine. And at least it did build, and the resulting binaries did work, although I’m personally still not very comfortable or confident about this approach (perhaps that might change as I learn more about Rust).
With that in mind, at this point you may wonder how any distribution could sanely package this. The problem is that they can’t. Fedora and other distributions with stable releases take a similar approach to what we’ve done in Debian, while distributions with much more relaxed policies (like Arch) include all the dependencies as they are vendored upstream."
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With this in mind (not even considering some hostile emails that I recently received from the upstream developer or his public rants on lkml and reddit), I decided to remove bcachefs-tools from Debian completely. Although after discussing this with another DD, I was convinced to orphan it instead, which I have now done.
Oh man, that isn't a good luck for Rust. What do those tools do and how much code is there anyway? If they are userspace tools, what is the benefit of writing them in Rust?
Everything is better in Rust. Faster, safer... And also the developer experience is amazing with cargo.
The problem here is not Rust, it's the humans, it seems.
The dependencies are set manually, of course, and the dev was enforcing something too strict, it seems, and that is causing headaches.
But, as the debian dude has learned... Rust programs will 99.999 % work if they can be compiled.
It's the same in C. Most programs don't test against the exact versions of most C libraries either. I'm not sure why he's so amazed at this.
Debian is the most stable distro and downstream loads of distros rely on Debian being clean. This dev has to be strict if they want to maintain the status quo. Rather let the user DL this as a standalone package and still use it, instead of it being included by default with the possibility of breaking.
And another thing. Version pinning should be normalized. I just can't bend my mind around code which has to be refactored every 12 - 24 months because dependencies were not version pinned and a new thing broke an old thing. Unless this code is your baby and you stare at every day, constantly moving forward, you should write code that lasts.
That's fair. Debian does need to be extra careful given their position in the OS chain.