From b0180fa1e1dd9f3d1aff1d2453b1c6fedd969ff8 Mon Sep 17 00:00:00 2001
From: Sridhar Ratnakumar <srid@srid.ca>
Date: Thu, 4 Jul 2024 16:42:17 -0400
Subject: [PATCH] feat: Allow overriding namespace

Also use `${service}.${name}` as the default namespace.

Do this for postgres, to begin with.
---
 nix/lib.nix              | 21 ++++++++++++++++-----
 nix/postgres/default.nix |  4 ++--
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/nix/lib.nix b/nix/lib.nix
index ebf6bf06..81c8d56c 100644
--- a/nix/lib.nix
+++ b/nix/lib.nix
@@ -8,25 +8,36 @@
     { config, pkgs, lib, ... }:
     let
       # Derive name from filename
-      name = lib.pipe mod [
+      service = lib.pipe mod [
         builtins.baseNameOf
         (lib.strings.splitString ".")
         builtins.head
       ];
     in
     {
-      options.services.${name} = lib.mkOption {
+      options.services.${service} = lib.mkOption {
         description = ''
-          ${name} service
+          ${service} service
         '';
         default = { };
         type = lib.types.attrsOf (lib.types.submoduleWith {
           specialArgs = { inherit pkgs; };
-          modules = [ mod ];
+          modules = [
+            ({ name, ... }: {
+              options.namespace = lib.mkOption {
+                description = ''
+                  Namespace for the ${service} service
+                '';
+                default = "${service}.${name}";
+                type = lib.types.str;
+              };
+            })
+            mod
+          ];
         });
       };
       config.settings.imports =
-        lib.pipe config.services.${name} [
+        lib.pipe config.services.${service} [
           (lib.filterAttrs (_: cfg: cfg.enable))
           (lib.mapAttrsToList (_: cfg: cfg.outputs.settings))
         ];
diff --git a/nix/postgres/default.nix b/nix/postgres/default.nix
index f9d114e7..8d0eaf7d 100644
--- a/nix/postgres/default.nix
+++ b/nix/postgres/default.nix
@@ -301,7 +301,7 @@ in
               in
               {
                 command = setupScript;
-                namespace = name;
+                inherit (config) namespace;
               };
 
             # DB process
@@ -329,6 +329,7 @@ in
                 ] ++ (lib.optional (config.superuser != null) "-U ${config.superuser}");
               in
               {
+                inherit (config) namespace;
                 command = startScript;
                 # SIGINT (= 2) for faster shutdown: https://www.postgresql.org/docs/current/server-shutdown.html
                 shutdown.signal = 2;
@@ -340,7 +341,6 @@ in
                   success_threshold = 1;
                   failure_threshold = 5;
                 };
-                namespace = name;
                 depends_on."${name}-init".condition = "process_completed_successfully";
                 # https://github.com/F1bonacc1/process-compose#-auto-restart-if-not-healthy
                 availability.restart = "on_failure";