dotfiles/nixos/secrets.nix

{
  inputs,
  pkgs,
  ...
}: {
  home-manager.users.imalison = {config, ...}: {
    imports = [inputs.agenix.homeManagerModules.default];
    age.identityPaths = ["${config.home.homeDirectory}/.ssh/id_ed25519"];
    home.packages = [
      inputs.agenix.packages."${pkgs.stdenv.hostPlatform.system}".default
    ];
    age.secrets.gpg-keys.file = ./secrets/gpg-keys.age;
    age.secrets.gpg-passphrase.file = ./secrets/gpg-passphrase.age;
    age.secrets.gws-client-secret.file = ./secrets/gws-client-secret.json.age;

    home.sessionVariables.GOOGLE_WORKSPACE_CLI_CREDENTIALS_FILE = "${config.xdg.configHome}/gws/client_secret.json";

    systemd.user.services.import-gpg-key = {
      Unit = {
        Description = "Import GPG private key";
        After = ["agenix.service"];
        # 3 total retries
        StartLimitIntervalSec = 0;
        StartLimitBurst = 3;
      };

      Install.WantedBy = ["default.target"];
      Service = {
        Type = "oneshot";
        RestartSec = 5;
        Restart = "on-failure";
        ExecStart = let
          replace = builtins.replaceStrings ["$XDG_RUNTIME_DIR"] ["\${XDG_RUNTIME_DIR}"];
          path = replace config.age.secrets.gpg-keys.path;
          passphrasePath = replace config.age.secrets.gpg-passphrase.path;
          importScript = pkgs.writeShellScript "import-gpg-key" ''
            set -eu

            normalized_key_file="$(mktemp)"
            trap 'rm -f "$normalized_key_file"' EXIT

            # Some historical exports omitted the required blank line after the
            # armor header. GnuPG imports the keys but exits non-zero, which
            # leaves the unit in a failed state.
            awk '
              pending_blank {
                if ($0 != "") {
                  print ""
                }
                pending_blank = 0
              }
              { print }
              /^-----BEGIN PGP PRIVATE KEY BLOCK-----$/ {
                pending_blank = 1
              }
            ' ${path} > "$normalized_key_file"

            exec ${pkgs.gnupg}/bin/gpg \
              --batch \
              --pinentry-mode loopback \
              --passphrase-file ${passphrasePath} \
              --import "$normalized_key_file"
          '';
        in "${importScript}";
      };
    };

    systemd.user.services.link-gws-client-secret = {
      Unit = {
        Description = "Link gws client secret";
        After = ["agenix.service"];
      };

      Install.WantedBy = ["default.target"];
      Service = {
        Type = "oneshot";
        ExecStart = let
          replace = builtins.replaceStrings ["$XDG_RUNTIME_DIR"] ["\${XDG_RUNTIME_DIR}"];
          secretPath = replace config.age.secrets.gws-client-secret.path;
          linkScript = pkgs.writeShellScript "link-gws-client-secret" ''
            set -eu

            config_dir="${config.xdg.configHome}/gws"
            target="${secretPath}"
            link_path="$config_dir/client_secret.json"

            mkdir -p "$config_dir"
            ln -sfn "$target" "$link_path"
          '';
        in "${linkScript}";
      };
    };
  };
}