From 9f33ab62d99c98e3f5bddd64532f15f482cf01b2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Janne=20He=C3=9F?= <janne@hess.ooo>
Date: Tue, 2 Jun 2020 16:27:07 +0200
Subject: [PATCH 04/22] nixos/testing: Add support for specialArgs

Since using flakes disallows the usage of <unstable> (which I use in
some tests), this adds an alternative. By setting specialArgs, all VMs
can get the `unstable` flake input as an arg. This is not possible with
extraConfigurations, as that would lead to infinite recursions.
---
 nixos/lib/build-vms.nix      | 8 +++++---
 nixos/lib/testing-python.nix | 4 +++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/nixos/lib/build-vms.nix b/nixos/lib/build-vms.nix
index 1bad63b9194..b1575fc13bb 100644
--- a/nixos/lib/build-vms.nix
+++ b/nixos/lib/build-vms.nix
@@ -3,8 +3,10 @@
   minimal ? false
 , # Ignored
   config ? null
-  # Nixpkgs, for qemu, lib and more
-, pkgs
+, # Nixpkgs, for qemu, lib and more
+  pkgs
+, # !!! See comment about args in lib/modules.nix
+  specialArgs ? {}
 , # NixOS configuration to add to the VMs
   extraConfigurations ? []
 }:
@@ -31,7 +33,7 @@ rec {
     nodes: configurations:
 
     import ./eval-config.nix {
-      inherit system;
+      inherit system specialArgs;
       modules = configurations ++ extraConfigurations;
       baseModules =  (import ../modules/module-list.nix) ++
         [ ../modules/virtualisation/qemu-vm.nix
diff --git a/nixos/lib/testing-python.nix b/nixos/lib/testing-python.nix
index 76a2022082c..498f97336c0 100644
--- a/nixos/lib/testing-python.nix
+++ b/nixos/lib/testing-python.nix
@@ -4,10 +4,12 @@
 , minimal ? false
   # Ignored
 , config ? {}
+  # !!! See comment about args in lib/modules.nix
+, specialArgs ? {}
   # Modules to add to each VM
 , extraConfigurations ? [] }:
 
-with import ./build-vms.nix { inherit system pkgs minimal extraConfigurations; };
+with import ./build-vms.nix { inherit system pkgs minimal specialArgs extraConfigurations; };
 with pkgs;
 
 rec {
-- 
2.29.2