refactor(ops): Split //ops/nixos into different locations r/2482

Splits //ops/nixos into:

* //ops/nixos.nix - utility functions for building systems
* //ops/machines - shared machine definitions (read by readTree)
* //ops/modules - shared NixOS modules (skipped by readTree)

This simplifies working with the configuration fixpoint in whitby, and
is overall a bit more in line with how NixOS systems in user folders
currently work.

Change-Id: I1322ec5cc76c0207c099c05d44828a3df0b3ffc1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2931
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: glittershark <grfn@gws.fyi>

1 files changed, 0 insertions, 53 deletions

diff --git a/ops/nixos/smtprelay.nix b/ops/nixos/smtprelay.nix
deleted file mode 100644
index d8e03b5794b0..000000000000
--- a/ops/nixos/smtprelay.nix
+++ /dev/null
@@ -1,53 +0,0 @@
-# NixOS module for configuring the simple SMTP relay.
-{ depot, pkgs, config, lib, ... }:
-
-let
-  inherit (builtins) attrValues mapAttrs;
-  inherit (lib)
-    concatStringsSep
-    mkEnableOption
-    mkIf
-    mkOption
-    types
-;
-
-  cfg = config.services.depot.smtprelay;
-  description = "Simple SMTP relay";
-
-  # Configuration values that are always overridden. In particular,
-  # `config` is specified to always load $StateDirectory/secure.config
-  # (so that passwords can be loaded from there) and logging is pinned
-  # to stdout for journald compatibility.
-  overrideArgs = {
-    logfile = "";
-    config = "/var/lib/smtprelay/secure.config";
-  };
-
-  # Creates the command line argument string for the service.
-  prepareArgs = args:
-    concatStringsSep " "
-      (attrValues (mapAttrs (key: value: "-${key} '${toString value}'")
-                            (args // overrideArgs)));
-in {
-  options.services.depot.smtprelay = {
-    enable = mkEnableOption description;
-    args = mkOption {
-      type = types.attrsOf types.str;
-      description = "Key value pairs for command line arguments";
-    };
-  };
-
-  config = mkIf cfg.enable {
-    systemd.services.smtprelay = {
-      inherit description;
-      script = "${depot.third_party.smtprelay}/bin/smtprelay ${prepareArgs cfg.args}";
-      wantedBy = [ "multi-user.target" ];
-
-      serviceConfig = {
-        Restart = "always";
-        StateDirectory = "smtprelay";
-        DynamicUser = true;
-      };
-    };
-  };
-}