flake: Attempt to run doctests

Reviewed-by: Alexander Kobjolke <me@failco.de>

flake.nix

@@ -22,10 +22,8 @@
 
         packageName = "hcat";
       in {
-        packages.${packageName} = haskellPackages.callCabal2nix packageName self
+        packages.${packageName} =
-          rec {
+          haskellPackages.callCabal2nix packageName self { };
-            # Dependency overrides go here
-          };
 
         packages.default = self.packages.${system}.${packageName};
 
@@ -64,7 +62,8 @@
         devShells.default = haskellPackages.shellFor {
           inherit (self.checks.${system}.pre-commit-check) shellHook;
 
-          packages = p: [ self.packages.${system}.default ];
+          packages = _:
+            pkgs.lib.filter (x: x != null) [ self.packages.${system}.default ];
 
           withHoogle = true;
 

hcat.cabal

@@ -47,7 +47,6 @@ executable hcat
   build-depends:
       base >=4.13 && <5
     , hcat
-    , text
   default-language: GHC2021
 
 test-suite spec
@@ -57,7 +56,7 @@ test-suite spec
       HCatSpec
       Paths_hcat
   hs-source-dirs:
-      test
+      test/spec
   default-extensions:
       BlockArguments
       OverloadedStrings
@@ -71,7 +70,4 @@ test-suite spec
     , base >=4.13 && <5
     , hcat
     , hspec
-    , quickcheck-instances
-    , quickcheck-text
-    , text
   default-language: GHC2021

package.yaml

@@ -11,7 +11,6 @@ extra-source-files:
 
 dependencies:
   - base >= 4.13 && < 5
-  - text
 #  - bytestring
 #  - time
 #  - process
@@ -29,6 +28,8 @@ default-extensions:
 
 library:
   source-dirs: src
+  dependencies:
+    - text
   verbatim:
     default-language: GHC2021
 
@@ -46,13 +47,19 @@ tests:
     cpp-options: -DTEST
     main: Spec.hs
     source-dirs:
-      - test
+      - test/spec
     dependencies:
       - hcat
       - hspec
       - QuickCheck
-      - quickcheck-instances
+      # - quickcheck-instances
-      - quickcheck-text
+      # - quickcheck-text
     build-tools: hspec-discover
     verbatim:
       default-language: GHC2021
+  # doctest:
+  #   main: Doctest.hs
+  #   source-dirs:
+  #     - test/doctest
+  #   dependencies:
+  #     - process

test/doctest/Doctest.hs

@@ -0,0 +1,10 @@
+-- | Rn the doctest executable
+module Main where
+
+import System.Process (callProcess)
+
+doctest :: [String] -> IO ()
+doctest = callProcess "doctest"
+
+main :: IO ()
+main = doctest ["--fast", "src"]