Merge pull request #4532 from purefn/haskell-validation

haskell: add validation package

pkgs/development/libraries/haskell/validation/default.nix

···
+# This file was auto-generated by cabal2nix. Please do NOT edit manually!
+
+{ cabal, bifunctors, doctest, filepath, lens, QuickCheck
+, semigroupoids, semigroups, transformers
+}:
+
+cabal.mkDerivation (self: {
+  pname = "validation";
+  version = "0.4.1";
+  sha256 = "05mws9gqlqjmzcw6d3kclrh9dybchhp61qsfwg77h31n44j7w0mh";
+  buildDepends = [
+    bifunctors lens semigroupoids semigroups transformers
+  ];
+  testDepends = [ doctest filepath QuickCheck ];
+  meta = {
+    homepage = "https://github.com/tonymorris/validation";
+    description = "A data-type like Either but with an accumulating Applicative";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})

pkgs/top-level/haskell-packages.nix

···
 
   taffybar = callPackage ../applications/misc/taffybar {};
 
+  validation = callPackage ../development/libraries/haskell/validation {};
+
   xlsx = callPackage ../development/libraries/haskell/xlsx {};
 
   xmobar = callPackage ../applications/misc/xmobar {};