Merge master into staging-next

  As an exception, an explicit conditional expression with null can be used when fixing a important bug without triggering a mass rebuild.

  If this is done a follow up pull request _should_ be created to change the code to `lib.optional(s)`.

# Practical contributing advice

To contribute effectively and efficiently, you need to be aware of how the contributing process generally works.

This section aims to document the process as we live it in Nixpkgs to set expectations right and give practical tips on how to work with it.

## I opened a PR, how do I get it merged?

[i-opened-a-pr-how-do-i-get-it-merged]:#i-opened-a-pr-how-do-i-get-it-merged

- `nodePackages.coc-metals` was removed due to being deprecated upstream.

  `vimPlugins.nvim-metals` is its official replacement.

- `matrix-sliding-sync` was removed because it has been replaced by the simplified sliding sync functionality introduced in matrix-synapse 114.0.

- `teleport` has been upgraded from major version 15 to major version 16.

  Refer to upstream [upgrade instructions](https://goteleport.com/docs/management/operations/upgrading/)

  and [release notes for v16](https://goteleport.com/docs/changelog/#1600-061324).

  ./services/matrix/mjolnir.nix

  ./services/matrix/mx-puppet-discord.nix

  ./services/matrix/pantalaimon.nix

  ./services/matrix/matrix-sliding-sync.nix

  ./services/matrix/synapse.nix

  ./services/misc/airsonic.nix

  ./services/misc/amazon-ssm-agent.nix

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

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

    (mkRemovedOptionModule [ "services" "mathics" ] "The Mathics module has been removed")

    (mkRemovedOptionModule [ "services" "matrix-sliding-sync" ] "The matrix-sliding-sync package has been removed, since matrix-synapse incorporated its functionality")

    (mkRemovedOptionModule [ "services" "meguca" ] "Use meguca has been removed from nixpkgs")

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

    (mkRemovedOptionModule [ "services" "mxisd" ] "The mxisd module has been removed as both mxisd and ma1sd got removed.")

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

let

  cfg = config.services.matrix-sliding-sync;

in

{

  imports = [

    (lib.mkRenamedOptionModule [ "services" "matrix-synapse" "sliding-sync" ] [ "services" "matrix-sliding-sync" ])

  ];

  options.services.matrix-sliding-sync = {

    enable = lib.mkEnableOption "sliding sync";

    package = lib.mkPackageOption pkgs "matrix-sliding-sync" { };

    settings = lib.mkOption {

      type = lib.types.submodule {

        freeformType = with lib.types; attrsOf str;

        options = {

          SYNCV3_SERVER = lib.mkOption {

            type = lib.types.str;

            description = ''

              The destination homeserver to talk to not including `/_matrix/` e.g `https://matrix.example.org`.

            '';

          };

          SYNCV3_DB = lib.mkOption {

            type = lib.types.str;

            default = "postgresql:///matrix-sliding-sync?host=/run/postgresql";

            description = ''

              The postgres connection string.

              Refer to <https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-CONNSTRING>.

            '';

          };

          SYNCV3_BINDADDR = lib.mkOption {

            type = lib.types.str;

            default = "127.0.0.1:8009";

            example = "[::]:8008";

            description = "The interface and port or path (for unix socket) to listen on.";

          };

          SYNCV3_LOG_LEVEL = lib.mkOption {

            type = lib.types.enum [ "trace" "debug" "info" "warn" "error" "fatal" ];

            default = "info";

            description = "The level of verbosity for messages logged.";

          };

        };

      };

      default = { };

      description = ''

        Freeform environment variables passed to the sliding sync proxy.

        Refer to <https://github.com/matrix-org/sliding-sync#setup> for all supported values.

      '';

    };

    createDatabase = lib.mkOption {

      type = lib.types.bool;

      default = true;

      description = ''

        Whether to enable and configure `services.postgres` to ensure that the database user `matrix-sliding-sync`

        and the database `matrix-sliding-sync` exist.

      '';

    };

    environmentFile = lib.mkOption {

      type = lib.types.str;

      description = ''

        Environment file as defined in {manpage}`systemd.exec(5)`.

        This must contain the {env}`SYNCV3_SECRET` variable which should

        be generated with {command}`openssl rand -hex 32`.

      '';

    };

  };

  config = lib.mkIf cfg.enable {

    services.postgresql = lib.optionalAttrs cfg.createDatabase {

      enable = true;

      ensureDatabases = [ "matrix-sliding-sync" ];

      ensureUsers = [ {

        name = "matrix-sliding-sync";

        ensureDBOwnership = true;

      } ];

    };

    systemd.services.matrix-sliding-sync = rec {

      after =

        lib.optional cfg.createDatabase "postgresql.service"

        ++ lib.optional config.services.dendrite.enable "dendrite.service"

        ++ lib.optional config.services.matrix-synapse.enable config.services.matrix-synapse.serviceUnit;

      wants = after;

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

      environment = cfg.settings;

      serviceConfig = {

        DynamicUser = true;

        EnvironmentFile = cfg.environmentFile;

        ExecStart = lib.getExe cfg.package;

        StateDirectory = "matrix-sliding-sync";

        WorkingDirectory = "%S/matrix-sliding-sync";

        RuntimeDirectory = "matrix-sliding-sync";

        Restart = "on-failure";

        RestartSec = "1s";

      };

    };

  };

}