Make sure conda tests run with conda.

flake.nix

@@ -124,11 +124,11 @@
                   git
                   nixFlakes
                   parallel
+                  bash
                 ]
                 ++ pkgs.lib.optional (stdenv.isLinux) busybox
                 ++ pkgs.lib.optionals (stdenv.isDarwin) [
                   coreutils
-                  (pkgs.runCommand "bin-sh" {} "mkdir -p $out/bin && ln -s ${pkgs.bash}/bin/bash $out/bin/sh")
                 ])}"
 
                 cd tests

tests/all-tests.nix

@@ -1,35 +1,8 @@
 with builtins;
 let
   mach-nix = import ../. {};
-  conda = (getEnv "CONDA_TESTS") != "";
-  makeTest = file:
-      import file ({
-        inherit mach-nix;
-      } // (if conda then (rec {
-        baseArgsMkPython = { _provierDefaults = (fromTOML (readFile ./mach_nix/provider_defaults.toml) // {
-          _default = "conda,wheel,sdist,nixpkgs";
-        }); };
-        baseArgsBuildPythonPackage = baseArgsMkPython;
-      }) else {
-        baseArgsMkPython = { _provierDefaults = fromTOML (readFile ./mach_nix/provider_defaults.toml); };
-        baseArgsBuildPythonPackage = baseArgsMkPython;
-      }));
+  lib = mach-nix.nixpkgs.lib;
+  makeTests = import ./make-tests.nix;
+  testNames = lib.mapAttrsToList (n: v: lib.removeSuffix ".nix" n) (lib.filterAttrs (n: v: lib.hasPrefix "test_" n && lib.hasSuffix ".nix" n) (builtins.readDir ./.));
 in
-flatten (map (file: makeTests) [
-  ./test_alias_dateutil.nix
-  ./test_circular_deps.nix
-  ./test_dot_in_name.nix
-  ./test_extra_pkgs.nix
-  ./test_extras.nix
-  ./test_flakes.nix
-  ./test_jupyterlab_nixpkgs.nix
-  ./test_lazy_usage.nix
-  ./test_non_python_extra_pkgs.nix
-  ./test_overrides_selectPkgs.nix
-  ./test_passthru_select_pypi_pname.nix
-  ./test_py38_cp38_wheel.nix
-  ./test_pymc3.nix
-  ./test_r_pkgs.nix
-  ./test_underscore_override.nix
-  ./test_underscore_override_extra.nix
-])
+  lib.flatten (map (name: makeTests { file = ./${name}.nix; }) testNames)

tests/execute.sh

@@ -1,5 +1,7 @@
-#!/usr/bin/env sh
+#!/usr/bin/env bash
+
+set -euxo pipefail
 
 WORKERS=${WORKERS:-10}
 
-ls ./test_* | parallel -a - -j $WORKERS --halt now,fail=1 nix-build --no-out-link --show-trace
+find . -name "test_*.nix" | parallel -a - -j "${WORKERS}" --halt now,fail=1 nix-build --no-out-link --show-trace make-tests.nix --arg file

tests/make-tests.nix

@@ -0,0 +1,18 @@
+with builtins;
+let
+  mach-nix = import ../. {};
+  lib = mach-nix.nixpkgs.lib;
+  conda = (getEnv "CONDA_TESTS") != "";
+  makeTests = {file}:
+      import file ({
+        inherit mach-nix;
+      } // (if conda then (rec {
+        baseArgsMkPython = { _providerDefaults = (fromTOML (readFile ../mach_nix/provider_defaults.toml) // {
+          _default = "conda,wheel,sdist,nixpkgs";
+        }); };
+        baseArgsBuildPythonPackage = baseArgsMkPython;
+      }) else rec {
+        baseArgsMkPython = { _providerDefaults = fromTOML (readFile ../mach_nix/provider_defaults.toml); };
+        baseArgsBuildPythonPackage = baseArgsMkPython;
+      }));
+in makeTests

tests/test_py38_cp38_wheel.nix

@@ -1,11 +1,10 @@
 {
-  mach-nix ? import ../. {
-    python = "python38";
-  },
+  mach-nix ? import ../. {},
   ...
 }:
 with builtins;
 mach-nix.mkPython {
+  python = "python38";
   requirements = ''
     numba==0.50.1
   '';