nix: use a single /default.nix

This will make simpler the importation of this git repository from Nix code,
as a common hypothesis is that a default.nix is present at its root.

Other nix files could have been kept in each subfolder,
but as their Nix description is small I feel like it will be simpler to maintain
by only using a single file.

pybatsim-functional/default.nix → default.nix

@@ -5,9 +5,30 @@
 
 let
   self = rec {
+    pybatsim-core = kapack.pybatsim-core.overrideAttrs (attrs: rec {
+      name = "${kapack.pybatsim-core.name}-local";
+      src = kapack.pkgs.lib.sourceByRegex ./pybatsim-core [
+        "^pyproject\.toml$"
+        "^poetry\.lock$"
+        "^README\.rst$"
+        "^src$"
+        "^src/pybatsim$"
+        "^src/pybatsim/.\+\.py$"
+        "^src/pybatsim/batsim$"
+        "^src/pybatsim/batsim/.\+\.py$"
+        "^src/pybatsim/batsim/cmds$"
+        "^src/pybatsim/batsim/cmds/.\+\.py$"
+        "^src/pybatsim/batsim/tools$"
+        "^src/pybatsim/batsim/tools/.\+\.py$"
+        "^src/pybatsim/schedulers$"
+        "^src/pybatsim/schedulers/.\+\.py$"
+        "^src/pybatsim/schedulers/unMaintained$"
+        "^src/pybatsim/schedulers/unMaintained/.\+\.py$"
+      ];
+    });
     pybatsim-functional = kapack.pybatsim-functional.overrideAttrs (attrs: rec {
       name = "${kapack.pybatsim-functional.name}-local";
-      src = kapack.pkgs.lib.sourceByRegex ./. [
+      src = kapack.pkgs.lib.sourceByRegex ./pybatsim-functional [
         "^pyproject\.toml$"
         "^poetry\.lock$"
         "^src$"

pybatsim-core/default.nix

-{ kapack ? import
-    (fetchTarball "https://github.com/oar-team/nur-kapack/archive/master.tar.gz")
-  {}
-}:
-
-let
-  self = rec {
-    pybatsim-core = kapack.pybatsim-core.overrideAttrs (attrs: rec {
-      name = "${kapack.pybatsim-core.name}-local";
-      src = kapack.pkgs.lib.sourceByRegex ./. [
-        "^pyproject\.toml$"
-        "^poetry\.lock$"
-        "^README\.rst$"
-        "^src$"
-        "^src/pybatsim$"
-        "^src/pybatsim/.\+\.py$"
-        "^src/pybatsim/batsim$"
-        "^src/pybatsim/batsim/.\+\.py$"
-        "^src/pybatsim/batsim/cmds$"
-        "^src/pybatsim/batsim/cmds/.\+\.py$"
-        "^src/pybatsim/batsim/tools$"
-        "^src/pybatsim/batsim/tools/.\+\.py$"
-        "^src/pybatsim/schedulers$"
-        "^src/pybatsim/schedulers/.\+\.py$"
-        "^src/pybatsim/schedulers/unMaintained$"
-        "^src/pybatsim/schedulers/unMaintained/.\+\.py$"
-      ];
-    });
-  };
-in
-  self