alyraffauf/nixcfg
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nixcfg/hosts/common/README.md
Aly Raffauf 31866dbe20
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common

Overview

Common modules for my nix hosts that aren't better expressed as options & flake outputs.

Declarative WiFi Connections

WiFi networks can be configured declaratiely in wifi.nix using config.networking.networkmanager.ensureProfiles.profiles, provided by nixpkgs. I also provide helper functions for common wifi security types.

nm2nix can generate nix code for all WiFi networks currently configured in /etc/NetworkManager/system-connections/ and /run/NetworkManager/system-connections with the following command:

sudo su -c "cd /etc/NetworkManager/system-connections && nix --extra-experimental-features 'nix-command flakes' run github:Janik-Haag/nm2nix | nix --extra-experimental-features 'nix-command flakes' run nixpkgs#nixfmt-rfc-style"

Secrets (passwords, certificates, and identities) are supported, but must be declared and available as variables with agenix. They will be replaced upon activation with envsubst.

In short,

  1. Manually configure the WiFi network on one device.
  2. Export configuration to nix with nm2nix.
  3. Add secrets to secrets/wifi.age as variables (e.g. MYPSK=1234567890)
  4. Edit the code generated by nm2nix to reference $MYPSK instead of directly declaring the WPA password.
  5. Commit and push changes.
  6. Rebuild hosts as required to propogate your new WiFi configuration.