xvfb-run: refactor && add update script

[Artturin]

Closes #72906
Supersedes #74499

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• 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/)
• 22.05 Release Notes (or backporting 21.11 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
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[siraben]

Result of nixpkgs-review pr 167233 run on aarch64-darwin 1

[Artturin]

added a installCheckPhase which runs xterm with xvfb-run

[SuperSandro2000]

I am overwriting xterm to a dummy package because I don't want its icon in my applications and it is enforced when using something with X here https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/x11/xserver.nix#L670 . Now I need to rebuild a bunch of stuff just because the test here uses it. Any ideas how to solve that in a nice way?

[Artturin]

I am overwriting xterm to a dummy package because I don't want its icon in my applications and it is enforced when using something with X here https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/x11/xserver.nix#L670 . Now I need to rebuild a bunch of stuff just because the test here uses it. Any ideas how to solve that in a nice way?

Maybe this warrants a new option

nixpkgs/lib/lists.nix

Line 151 in 4406aef

remove =

nixpkgs/nixos/modules/config/system-path.nix

Line 170 in 6341419

paths = config.environment.systemPackages;

https://search.nixos.org/options?channel=unstable&from=0&size=50&sort=relevance&type=packages&query=excludepackages

[SuperSandro2000]

Very good idea. Currently testing locally and probably pushing later.

[SuperSandro2000]

#168194