Cabal'ify examples/hello-world

default.nix is mostly a copy of rib's default.nix

examples/hello-world/default.nix

@@ -0,0 +1,34 @@
+let
+  pkgs = import <nixpkgs> { };
+  compiler = "default";
+  haskellPackages =
+    if compiler == "default"
+      then pkgs.haskellPackages
+      else pkgs.haskell.packages.${compiler};
+in
+haskellPackages.developPackage {
+  root = ./.;
+  source-overrides = {
+    clay = pkgs.fetchFromGitHub {
+      owner = "sebastiaanvisser";
+      repo = "clay";
+      rev = "54dc9eaf0abd180ef9e35d97313062d99a02ee75";
+      sha256 = "0y38hyd2gvr7lrbxkrjwg4h0077a54m7gxlvm9s4kk0995z1ncax";
+    };
+    pandoc-include-code = pkgs.fetchFromGitHub {
+      owner = "owickstrom";
+      repo = "pandoc-include-code";
+      rev = "7e4d9d967ff3e3855a7eae48408c43b3400ae6f4";
+      sha256 = "0wvml63hkhgmmkdd2ml5a3g7cb69hxwdsjmdhdzjbqbrwkmc20rd";
+    };
+    rib = ./../..;
+  };
+
+  overrides = self: super: with pkgs.haskell.lib; {
+    clay = dontCheck super.clay;
+  };
+
+  modifier = drv: pkgs.haskell.lib.overrideCabal drv (attrs: {
+    buildTools = (attrs.buildTools or []) ++ [haskellPackages.ghcid] ;
+  });
+}

examples/hello-world/hello-world.cabal

@@ -0,0 +1,17 @@
+cabal-version:       2.4
+
+name:                hello-world
+version:             0.1.0.0
+license:             BSD-3-Clause
+author:              Sridhar Ratnakumar
+maintainer:          srid@srid.ca
+category:            Web
+
+executable hello-world
+  main-is:             Main.hs
+  build-depends:       base ^>=4.12.0.0
+                     , rib
+                     , clay
+                     , shake
+                     , lucid
+  default-language:    Haskell2010

rib.cabal

@@ -21,10 +21,9 @@ library
   exposed-modules:
       Rib.App
     , Rib.Pandoc
+    , Rib.Server
     , Rib.Shake
     , Rib.Simple
-  other-modules:
-      Rib.Server
   hs-source-dirs:
       src
   ghc-options: -Wall -Wincomplete-uni-patterns -Wincomplete-record-updates