1 files changed, 54 insertions, 0 deletions
diff --git a/Com/Simatime/buildGhc.nix b/Com/Simatime/buildGhc.nix
new file mode 100644
index 0000000..489651e
--- /dev/null
+++ b/Com/Simatime/buildGhc.nix
@@ -0,0 +1,54 @@
+
+nixpkgs:
+
+{  name  # the main module namespace
+,  nick  # a short name, for the executable
+,  deps  # deps get passed to ghc
+}:
+
+with nixpkgs;
+
+let
+  nsToPath = ns: builtins.toString (builtins.replaceStrings ["."] ["/"] ns);
+
+  path = nsToPath name;
+
+  depsToPackageSet = packageSet: deps:
+    map (s: builtins.getAttr s packageSet) deps;
+
+  claySrc = pkgs.fetchFromGitHub {
+    owner = "sebastiaanvisser";
+    repo = "clay";
+    rev = "cc7729b1b42a79e261091ff7835f7fc2a7ae3cee";
+    sha256 = "1vd67976lvi5l4qq18zy6j44apynkl44ps04p8vwfx4gzr895dyp";
+  };
+
+  ghc865_ = pkgs.haskell.packages.ghc865.override (oldAttrs: {
+    overrides = with pkgs.haskell.lib; self: super: {
+      clay = self.callCabal2nix "clay" claySrc {};
+      wai-middleware-metrics = dontCheck super.wai-middleware-metrics;
+    };
+  });
+
+  ghc = ghc865_.ghcWithPackages (hp: depsToPackageSet hp deps);
+
+in stdenv.mkDerivation {
+  name = name;
+  version = "0";
+  src = ../../.; # this is the git root
+  nativeBuildInputs = [ ghc ];
+  strictDeps = true;
+  buildPhase = ''
+    #
+    mkdir -p $out/{bin,static} ${path}
+    #
+    # compile with ghc
+    #
+    ${ghc}/bin/ghc -Werror -i. \
+        --make ${path}.hs \
+        -main-is ${name} \
+        -o $out/bin/${nick}
+  '';
+  # the install process was handled above
+  installPhase = "exit 0";
+} // { env = ghc; }