bug: HM always writes settings.json for zed

[DaRacci]

Are you following the right branch?

• My Nixpkgs and Home Manager versions are in sync

Is there an existing issue for this?

• I have searched the existing issues

Issue description

When using zed-editor, I've configured no settings or extensions but there is still a settings.json file generated.

I've figured out the issue comes from this

home-manager/modules/programs/zed-editor.nix

Lines 10 to 11 in c7ffc97

	# this part by @cmacrae
	auto_install_extensions = lib.genAttrs cfg.extensions (_: true);

Later on when the config is checked for being empty it will never be empty because auto_install_extensions will always be in mergedSettings even if there were none defined.

Maintainer CC

No response

System information

- system: `"x86_64-linux"`
 - host os: `Linux 6.11.11-xanmod1, NixOS, 25.05 (Warbler), 25.05.20241209.a73246e`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Lix, like Nix) 2.92.0-dev-pre20241210-8ddcdfb
System type: x86_64-linux
Additional system types: i686-linux, x86_64-v1-linux, x86_64-v2-linux, x86_64-v3-linux
Features: gc, signed-caches
System configuration file: /etc/nix/nix.conf
User configuration files: /home/racci/.config/nix/nix.conf:/nix/store/dfn5fg6l506vm7n8cchfys27x4wj27iy-stylix-kde-config/nix/store/dfn5fg6l506vm7n8cchfys27x4wj27iy-stylix-kde-config/etc/xdg/nix/nix.conf:/home/racci/.nix-profile/etc/xdg/nix/nix.conf:/nix/profile/etc/xdg/nix/nix.conf:/home/racci/.local/state/nix/profile/etc/xdg/nix/nix.conf:/etc/profiles/per-user/racci/etc/xdg/nix/nix.conf:/nix/var/nix/profiles/default/etc/xdg/nix/nix.conf:/run/current-system/sw/etc/xdg/nix/nix.conf
Store directory: /nix/store
State directory: /nix/var/nix
Data directory: /nix/store/wpr7kirrxzz1l8kb17vwnqggl8dbcly4-lix-2.92.0-dev-pre20241210-8ddcdfb/share`
 - nixpkgs: `/nix/store/yw6kg4rb9v8s3ypjbpspig5r81m4lr5s-source`

[teto]

classic problem. PR welcome

[DaRacci]

Fixed in 66c5d8b