prepare for pytest

Signed-off-by: Florian Brandes <florian.brandes@posteo.de>

devenv.nix

@@ -5,20 +5,20 @@
 , ...
 }:
 
+let
+  req = pkgs.concatText "req" [
+    ./requirements.txt
+    ./requirements-dev.txt
+  ];
+in
+
 {
-  # https://devenv.sh/basics/
-  # env.GREET = "devenv";
-
   # https://devenv.sh/packages/
-  packages = [ pkgs.file pkgs.swig4 pkgs.openssl ];
-
-  # https://devenv.sh/scripts/
-  # scripts.hello.exec = "echo hello from $GREET";
-
-  # enterShell = ''
-  #   hello
-  #   git --version
-  # '';
+  packages = [
+    pkgs.file
+    pkgs.swig4
+    pkgs.openssl
+  ];
 
   # https://devenv.sh/tests/
   # enterTest = ''
@@ -35,7 +35,7 @@
     enable = true;
     venv = {
       enable = true;
-      requirements = ./requirements.txt;
+      requirements = builtins.readFile req;
     };
   };
 
@@ -54,7 +54,6 @@
     pylint.enable = true;
     detect-private-keys.enable = true;
 
-
   };
 
   # https://devenv.sh/processes/