1 files changed, 44 insertions, 0 deletions
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..4290cbb
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,44 @@
+{ nixpkgs ? import <nixpkgs> {}
+, compiler ? "default"
+, doBenchmark ? false
+}:
+
+let
+  # cabal2nix . > regfish.nix
+  packageFile = ./regfish.nix;
+
+  inherit (nixpkgs) lib pkgs;
+
+  haskellPackages = if compiler == "default"
+                       then pkgs.haskellPackages
+                       else pkgs.haskell.packages.${compiler};
+
+  hoogle =
+    haskellPackages.callPackage <nixpkgs/pkgs/development/haskell-modules/hoogle.nix> {
+      packages =
+        (haskellPackages.callPackage packageFile {
+          mkDerivation = pkgs.lib.id;
+        }).executableHaskellDepends;
+    };
+
+  variant = if doBenchmark then pkgs.haskell.lib.doBenchmark else pkgs.lib.id;
+
+  drv = variant (haskellPackages.callPackage packageFile {
+  });
+
+in
+
+  pkgs.lib.overrideDerivation drv.env (oldAttrs: {
+    buildInputs = [
+      pkgs.cabal-install
+    ];
+    shellHook = ''
+      cd ${lib.escapeShellArg (toString ./.)}
+      alias ghci='ghci -flocal-ghci-history -odir ~/tmp/regfish -hidir ~/tmp/regfish'
+      export HISTFILE=.bash_history HISTSIZE=100000
+
+      if test -e .profile; then
+        . ./.profile
+      fi
+    '';
+  })