feat(users/Profpatsch): add writeHaskellInteractive r/5618

Instead of compiling the module, run it in interpreted mode. Saves on
linking times and can probably be driven to do cooler things in the
future, like calling functions directly via an environment variable or
something.

Change-Id: I9c835005462cdd86055fb7702630a44f78c36107
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7781
Autosubmit: Profpatsch <mail@profpatsch.de>
Reviewed-by: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI

1 files changed, 12 insertions, 0 deletions

diff --git a/users/Profpatsch/writers/default.nix b/users/Profpatsch/writers/default.nix
index 0e8ad96356..9fb69231a1 100644
--- a/users/Profpatsch/writers/default.nix
+++ b/users/Profpatsch/writers/default.nix
@@ -99,10 +99,22 @@ let
     };
 
 
+  ghcBins = libraries: depot.nix.getBins (pkgs.ghc.withPackages (_: libraries)) [ "runghc" ];
+
+  writeHaskellInteractive = name: { libraries, ghcArgs ? [ ] }: path:
+    depot.nix.writeExecline name { } ([
+      (ghcBins libraries).runghc
+      "--"
+    ] ++ ghcArgs ++ [
+      "--"
+      path
+    ]);
+
 in
 {
   inherit
     python3
     python3Lib
+    writeHaskellInteractive
     ;
 }