dotfiles/home-manager/modules/gpg.nix

# SPDX-FileCopyrightText: 2022 Richard Brežák <richard@brezak.sk>
#
# SPDX-License-Identifier: LGPL-3.0-or-later
{
  pkgs,
  config,
  lib,
  ...
}:
with lib; let
  cfg = config.magic_rb.programs.gpg;
in {
  options.magic_rb.programs.gpg = {
    enable =
      mkEnableOption
      ''
        Enable gpg and gpg-key.
      '';
    pinentryFlavor = mkOption {
      description = "Which pinentry flavor should be used.";
      type = types.enum [
        "curses"
        "emacs"
        "mac"
        "gtk2"
        "qt"
        "gnome"
      ];
      default = "gtk2";
    };
  };

  config = mkIf cfg.enable {
    home.packages = with pkgs; [
      gpg-key-rb
      gnupg
      pass
    ];

    home.file.".gpg-agent.conf".text = ''
      enable-ssh-support
      pinentry-program ${pkgs.pinentry."${cfg.pinentryFlavor}"}/bin/pinentry
    '';

    home.file.".profile".text = ''
      export SSH_AUTH_SOCK=$(gpgconf --list-dirs agent-ssh-socket)
    '';

    home.activation.gnupghome = config.lib.dag.entryAfter ["writeBoundary"] ''
      if [[ ! -e ~/.gnupg ]]
      then
        ln -sf /mnt/key/gnupg ~/.gnupg
      fi

      if [[ ! -e ~/.gnupg/gpg-agent.conf ]] && [[ -d /mnt/key/gnupg ]]
      then
        ln -sf ~/.gpg-agent.conf /mnt/key/gnupg/gpg-agent.conf
      fi
    '';
  };
}