nixos/direnv: fix silent option

[Gerg-L]

$DIRENV_LOG_FORMAT is currently broken see: direnv/direnv#1418

this PR fixes the silent option and adds the settings option

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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[MidAutumnMoon]

This breaks the evaluation of nixos. PR to suggest a fix #399966

[acid-bong]

Oh, Gerg, I found out what else you forgot: since the variables are gone, cfg.silent is no longer checked against. I'm thinking of two things:

1. just apply the toml option instead

settings = lib.mkIf cfg.silent {
  global.log_format = "-";
};

2. use smth from lib/modules.nix and make a warning for direnv.silent

[eclairevoyant]

What do you mean by that? cfg.silent is in the check already.

    programs = {
      direnv.settings = lib.mkIf cfg.silent {
        global = {
          log_format = lib.mkDefault "-";
          log_filter = lib.mkDefault "^$";
        };
      };

[acid-bong]

whoops, i'm blind, sorry for bothering 🙈