fluent-bit: link against Nix dependencies, fix Darwin builds, and add NixOS module

[commiterate]

Link against Nix dependencies, fix Darwin builds, and add NixOS module (upstreams commiterate/nix-fluent-bit).

fluent-bit vends its dependencies by keeping a copy of their sources under lib/ in their source tree and building them from source. All of the dependencies their CMake setup can source from the system are already Nix packages (e.g. libbacktrace, luajit).

Darwin builds have also been silently broken for awhile now.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[commiterate]

@samrose @fpletz This is tentative. Will adjust if either of you aren't interested in maintaining this alongside the fluent-bit package.

[fpletz]

Unfortunately, I'm not using fluent-bit anymore. Please remove me because I can't really maintain it. AFAIK @samrose wasn't really active in the last few years maintaining this package so if he doesn't respond it's probably best to remove him too.

You can add yourself and I'll be happy to review your changes though. 😄

[commiterate]

Removed you from the ci/OWNERS file and the package maintainers list. I'll keep @samrose in the meanwhile.

[commiterate]

@tiredofit @elohmeier Either of you interested in being a maintainer for the fluent-bit package and NixOS module? Saw both of you are using it in public repos and are already in maintainers/maintainers-list.nix.

Decided to go with Vector instead of Fluent Bit while fixing up the package and adding the NixOS module so I won't be using this anymore.

[fpletz]

Please rebase due to the version bump from #366830.

[Scrumplex]

Let's follow RFC 42 here

Suggested change

	configuration = lib.mkOption {
	settings = lib.mkOption {

[commiterate]

Does the RFC mandate the option be named settings? Outside of the option name, it seems like this is adhering to the RFC.

Generally I've been trying to expose options with names based on the program's command line options (in this case fluent-bit uses --config so I've expanded that to configuration) or their relevant config file field name (e.g. graceLimit based on grace).

[Scrumplex]

Suggested change

	{option}`configurationFile` takes precedence over {option}`configuration`.
	{option}`configurationFile` takes precedence over {option}`settings`.