From b7752eef57e008c0d2a7dad868e98ff8b802bd22 Mon Sep 17 00:00:00 2001
From: Cara Salter <cara@devcara.com>
Date: Mon, 30 May 2022 00:11:41 -0400
Subject: dist: Initial nixos module

---
 flake.nix | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)

diff --git a/flake.nix b/flake.nix
index 31ef857..fa2148d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,6 +34,67 @@
           };
           defaultApp = apps.homeworld;
 
+          nixosModules.homeworld = { config, lib, ... }: {
+            options = {
+              services.homeworld.enable = lib.mkEnableOption "enable homeworld server";
+              services.homeworld.environment-file-location = lib.mkOption {
+                type = lib.types.path;
+                default = "/var/lib/homeworld/.env";
+                description = "The location of the environment file";
+              };
+            };
+
+            config = lib.mkIf config.services.homeworld.enable  {
+              users.groups.homeworld = {
+                members = [ "homeworld" "${config.services.postgresql.superUser}" ];
+              };
+              users.users.homeworld = {
+                createHome = true;
+                isSystemUser = true;
+                home = "/var/lib/homeworld";
+                group = "homeworld";
+              };
+
+              systemd.services.homeworld = {
+                wantedBy = [ "multi-user.target" ];
+                after = [ "homeworld-init.service" "postgresql.service" ];
+                requires = [ "homeworld-init.service" "postgresql.service" ];
+                serviceConfig = {
+                  User = "homeworld";
+                  Group = "homeworld";
+                  Restart = "always";
+                  WorkingDirectory = "/var/lib/homeworld";
+                  ExecStart = "${defaultPackage}/bin/homeworld";
+                  EnvironmentFile =
+                    "${config.services.homeworld.environment-file-location}";
+                };
+              };
+
+              systemd.services.homeworld-init = {
+                wantedBy = [ "multi-user.target" ];
+                requires = [ "postgresql.service" ];
+                after = [ "postgresql.service" ];
+                description = "Init for Homeworld";
+
+                script = with pkgs; ''
+                  if ! [ -e /var/lib/postgresql/.homeworld-inited ]; then
+                    ${config.services.postgresql.package}/bin/createuser homeworld
+                    ${config.services.postgresql.package}/bin/createdb -O homeworld homeworld
+                    touch /var/lib/postgresql/.homeworld-inited
+                  fi
+                '';
+
+                serviceConfig = {
+                  Type = "oneshot";
+                  User = "${config.services.postgresql.superUser}";
+                  Group = "homeworld";
+                };
+              };
+
+              services.postgresql.enable = true;
+            };
+          };
+
           # `nix develop`
           devShell = pkgs.mkShell {
             nativeBuildInputs = with pkgs; [ rustc cargo ] ++ deps;
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