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Comment by anandsuresh

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Comment by anandsuresh

Nix operates at the cusp of some of the most complex and obscure parts of the technology stack: operating systems, compiler toolchains, and package managers. These inherently complex components require a fair bit of commitment to fully comprehend in order to be used well. You can get a lot of mileage skimming through some tutorials to become productive, but to really utilize it to its full potential requires a fair bit of investment. You don't have to be an automotive expert to drive a car, but if you're looking to race, it behooves oneself to invest the time it takes to gain the expertise.

Nix takes a very different approach to system configuration than the traditional ways. Because it treats the entirety of the operating system (bootloader, kernel, user-land, services, account management, etc.) as a single composable unit, it is forced to break some old rules that date back to the oldest days of Unix and are (now) considered to be written in stone. The deviation from the Unix Filesystem Hierarchy is, IMO, required to make systems more composable and maintainable, and is inherently a good thing in the long run. Portable development environments eliminate "works-on-my-laptop" scenarios and ensure everyone on the team is always in sync with each other and CI/CD. Reproducible builds that can be rolled back after a botched deployment are a huge win. And delivering all of these features in a single tool requires breaking some of the old rules, and that is always met with resistance due to the inertia of "it works fine for me".

To be honest, there is no reason why you should give up what works well for you. Having said that, for those that are looking beyond the traditional tools like shell-scripts, Ansible, Chef, Puppet, and others, Nix offers all that is needed to easily build and maintain composable software stacks. Docker comes close to delivering some of the same features as Nix, but comparing the two is a bit like comparing system configuration using shell scripts to Chef/Ansible.

Yes; one does have to learn a new language and its idiosyncrasies. But that is also true of things like Rust. As a seasoned C programmer, I am able to write "good" C code. But that is not a statement about C's ability to scale to larger teams. Rust requires developers to give up their old ways of thinking and "give in" to the Rust-way. The longer you fight the borrow-checker, the more painful it gets. But once you give in, you are able to write code that is safer for use within large teams, thus delivering more momentum in the long run. It is not that it can't be built with C; it requires a communal way of thinking about software complexity that is forged by experience and tempered by camaraderie, and tools like Rust and Nix are excellent supplements.

I do agree with you that the documentation leaves a lot to be desired. I've always considered the FreeBSD Handbook to be the gold-standard for technical documentation and Nix has its work cut out to reach that stage of maturity. But I have full confidence in the Nix community's ability to deliver.

Replies anandsuresh · 2021-10-16
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