prayer: remove

- The `junicode` font package has been updated to [major version 2](https://github.com/psb1558/Junicode-font/releases/tag/v2.001), which is now a font family. In particular, plain `Junicode.ttf` no longer exists. In addition, TrueType font files are now placed in `font/truetype` instead of `font/junicode-ttf`; this change does not affect use via `fonts.packages` NixOS option.

- The `prayer` package as well as `services.prayer` have been removed because it's been unmaintained for several years and the author's website has vanished.

## Other Notable Changes {#sec-release-23.11-notable-changes}

- A new option `system.switch.enable` was added. By default, this is option is

      #rtkit = 45; # dynamically allocated 2021-09-03

      dovecot2 = 46;

      dovenull2 = 47;

      prayer = 49;

      # prayer = 49; # dropped in 23.11

      mpd = 50;

      clamav = 51;

      #fprot = 52; # unused

      #rtkit = 45; # unused

      dovecot2 = 46;

      dovenull2 = 47;

      prayer = 49;

      # prayer = 49; # dropped in 23.11

      mpd = 50;

      clamav = 51;

      #fprot = 52; # unused

  ./services/networking/powerdns.nix

  ./services/networking/pppd.nix

  ./services/networking/pptpd.nix

  ./services/networking/prayer.nix

  ./services/networking/privoxy.nix

  ./services/networking/prosody.nix

  ./services/networking/quassel.nix

    (mkRemovedOptionModule [ "services" "riak" ] "The corresponding package was removed from nixpkgs.")

    (mkRemovedOptionModule [ "services" "cryptpad" ] "The corresponding package was removed from nixpkgs.")

    (mkRemovedOptionModule [ "services" "rtsp-simple-server" ] "Package has been completely rebranded by upstream as mediamtx, and thus the service and the package were renamed in NixOS as well.")

    (mkRemovedOptionModule [ "services" "prayer" ] "The corresponding package was removed from nixpkgs.")

    (mkRemovedOptionModule [ "i18n" "inputMethod" "fcitx" ] "The fcitx module has been removed. Please use fcitx5 instead")

    (mkRemovedOptionModule [ "services" "dhcpd4" ] ''

{ config, lib, pkgs, ... }:

with lib;

let

  inherit (pkgs) prayer;

  cfg = config.services.prayer;

  stateDir = "/var/lib/prayer";

  prayerUser = "prayer";

  prayerGroup = "prayer";

  prayerExtraCfg = pkgs.writeText "extraprayer.cf" ''

    prefix = "${prayer}"

    var_prefix = "${stateDir}"

    prayer_user = "${prayerUser}"

    prayer_group = "${prayerGroup}"

    sendmail_path = "/run/wrappers/bin/sendmail"

    use_http_port ${cfg.port}

    ${cfg.extraConfig}

  '';

  prayerCfg = pkgs.runCommand "prayer.cf" { preferLocalBuild = true; } ''

    # We have to remove the http_port 80, or it will start a server there

    cat ${prayer}/etc/prayer.cf | grep -v http_port > $out

    cat ${prayerExtraCfg} >> $out

  '';

in

{

  ###### interface

  options = {

    services.prayer = {

      enable = mkEnableOption (lib.mdDoc "the prayer webmail http server");

      port = mkOption {

        default = 2080;

        type = types.port;

        description = lib.mdDoc ''

          Port the prayer http server is listening to.

        '';

      };

      extraConfig = mkOption {

        type = types.lines;

        default = "" ;

        description = lib.mdDoc ''

          Extra configuration. Contents will be added verbatim to the configuration file.

        '';

      };

    };

  };

  ###### implementation

  config = mkIf config.services.prayer.enable {

    environment.systemPackages = [ prayer ];

    users.users.${prayerUser} =

      { uid = config.ids.uids.prayer;

        description = "Prayer daemon user";

        home = stateDir;

      };

    users.groups.${prayerGroup} =

      { gid = config.ids.gids.prayer; };

    systemd.services.prayer = {

      wantedBy = [ "multi-user.target" ];

      serviceConfig.Type = "forking";

      preStart = ''

        mkdir -m 0755 -p ${stateDir}

        chown ${prayerUser}:${prayerGroup} ${stateDir}

      '';

      script = "${prayer}/sbin/prayer --config-file=${prayerCfg}";

    };

  };

}