switch to flake

Author: Mic92

.envrc

@@ -0,0 +1,3 @@
+use flake
+
+export PYTHONPATH=$(realpath .):$PYTHONPATH

.github/workflows/test.yml

@@ -12,8 +12,6 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - uses: cachix/install-nix-action@v17
-      with:
-        nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/nixpkgs-unstable.tar.gz
     - name: run tests
       run:
-        nix-shell --run 'tox'
+        nix develop -c 'tox'

flake.lock

@@ -0,0 +1,31 @@
+{
+  description = "Development environment for this project";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+
+  outputs = inputs@{ flake-parts, ... }:
+    flake-parts.lib.mkFlake { inherit inputs; } ({ lib, ... }: {
+      systems = lib.systems.flakeExposed;
+      perSystem = { pkgs, ... }: {
+        devShells.default = pkgs.mkShell {
+          packages = with pkgs; [
+            bashInteractive
+            python38
+            python39
+            (python310.withPackages(ps: [ps.setuptools ps.tox ps.wheel]))
+            python311
+            python312
+            pypy3
+            twine
+          ];
+          shellHook = ''
+            # breaks python36/python37
+            unset _PYTHON_SYSCONFIGDATA_NAME
+          '';
+        };
+      };
+    });
+}