postgresql: refactor to pass jitSupport/llvm via scope instead of passthru

This makes it less error-prone to use the llvm package in extensions, because
it will always match the package used by the postgresql derivation itself.

Previously, you could've accidentally used llvm instead of postgresql.llvm
with a different result.

nixos/modules/services/databases/postgresql.nix

@@ -14,7 +14,7 @@ let
       #     package = pkgs.postgresql_<major>;
       #   };
       # works.
-      base = if cfg.enableJIT && !cfg.package.jitSupport then cfg.package.withJIT else cfg.package;
+      base = if cfg.enableJIT then cfg.package.withJIT else cfg.package;
     in
     if cfg.extraPlugins == []
       then base

pkgs/servers/sql/postgresql/ext/anonymizer.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, pg-dump-anon, postgresql, runtimeShell }:
+{ lib, stdenv, pg-dump-anon, postgresql, runtimeShell, jitSupport, llvm }:
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "postgresql_anonymizer";
@@ -6,7 +6,7 @@ stdenv.mkDerivation (finalAttrs: {
   inherit (pg-dump-anon) version src passthru;
 
   buildInputs = [ postgresql ];
-  nativeBuildInputs = [ postgresql ] ++ lib.optional postgresql.jitSupport postgresql.llvm;
+  nativeBuildInputs = [ postgresql ] ++ lib.optional jitSupport llvm;
 
   strictDeps = true;
 

pkgs/servers/sql/postgresql/ext/plv8/default.nix

@@ -4,6 +4,7 @@
 , v8
 , perl
 , postgresql
+, jitSupport
 # For test
 , runCommand
 , coreutils
@@ -138,6 +139,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with maintainers; [ marsam ];
     platforms = [ "x86_64-linux" "aarch64-linux" ];
     license = licenses.postgresql;
-    broken = postgresql.jitSupport;
+    broken = jitSupport;
   };
 })

pkgs/servers/sql/postgresql/ext/postgis.nix

@@ -13,6 +13,8 @@
 , libiconv
 , pcre2
 , nixosTests
+, jitSupport
+, llvm
 }:
 
 let
@@ -31,7 +33,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ libxml2 postgresql geos proj gdal json_c protobufc pcre2.dev ]
                 ++ lib.optional stdenv.isDarwin libiconv;
-  nativeBuildInputs = [ perl pkg-config ] ++ lib.optional postgresql.jitSupport postgresql.llvm;
+  nativeBuildInputs = [ perl pkg-config ] ++ lib.optional jitSupport llvm;
   dontDisableStatic = true;
 
   # postgis config directory assumes /include /lib from the same root for json-c library

pkgs/servers/sql/postgresql/generic.nix

@@ -221,7 +221,6 @@ let
       };
     in
     {
-      inherit jitSupport;
       psqlSchema = lib.versions.major version;
 
       withJIT = if jitSupport then this else jitToggle;
@@ -231,6 +230,8 @@ let
 
       pkgs = let
         scope = {
+          inherit jitSupport;
+          inherit (llvmPackages) llvm;
           postgresql = this;
           stdenv = stdenv';
           buildPgxExtension = buildPgxExtension.override {
@@ -257,8 +258,6 @@ let
       } // lib.optionalAttrs jitSupport {
         postgresql-jit = nixosTests.postgresql-jit.${thisAttr};
       };
-    } // lib.optionalAttrs jitSupport {
-      inherit (llvmPackages) llvm;
     };
 
     meta = with lib; {