add piston nix pkg for ghc-haskell

packages/haskell/9.0.1/build.sh

@@ -1,19 +0,0 @@
-#!/bin/bash
-
-PREFIX=$(realpath $(dirname $0))
-
-mkdir -p build
-
-cd build
-
-# Platform specific because a true source compile would require GHC to be installed already on the latest
-curl -L "https://downloads.haskell.org/~ghc/9.0.1/ghc-9.0.1-x86_64-deb10-linux.tar.xz" -o ghc.tar.xz
-tar xf ghc.tar.xz --strip-components=1
-rm ghc.tar.xz
-
-./configure --prefix="$PREFIX"
-make install -j$(nproc)
-
-cd ../
-
-rm -rf build

packages/haskell/9.0.1/compile

@@ -1,6 +0,0 @@
-#!/usr/bin/env bash
-
-# Compile haskell file(s)
-rename 's/$/\.hs/' "$@" # Add .hs extension
-ghc -dynamic -v0 -o out *.hs
-chmod +x out

packages/haskell/9.0.1/environment

@@ -1 +0,0 @@
-export PATH=$PWD/bin:$PATH

packages/haskell/9.0.1/metadata.json

@@ -1,5 +0,0 @@
-{
-    "language": "haskell",
-    "version": "9.0.1",
-    "aliases": ["haskell", "hs"]
-}

packages/haskell/9.0.1/run

@@ -1,4 +0,0 @@
-#!/bin/bash
-
-shift # Filename is only used to compile
-./out "$@"

packages/haskell/9.0.1/test.hs

@@ -1 +0,0 @@
-main = putStrLn "OK"

runtimes/default.nix

@@ -42,4 +42,5 @@ args: {
     "jelly" = import ./jelly.nix args;
     "openjdk-java" = import ./openjdk-java.nix args;
     "iverilog" = import ./iverilog.nix args;
+    "ghc-haskell" = import ./ghc-haskell.nix args;
 }

runtimes/ghc-haskell.nix

@@ -0,0 +1,37 @@
+{pkgs, piston, ...}:
+let
+    pkg = pkgs.haskell.compiler.ghcHEAD;
+in piston.mkRuntime {
+    language = "haskell";
+    version = pkg.version;
+    runtime = "ghc";
+
+    aliases = [
+        "hs"
+    ];
+    
+    compile = ''
+        rename 's/$/\.hs/' "$@" # Add .hs extension
+        ${pkg}/bin/ghc -dynamic -v0 -o out *.hs
+        chmod +x out
+    '';
+
+    run = ''
+        shift # Filename is only used to compile
+        ./out "$@"
+    '';
+
+    tests = [
+        (piston.mkTest {
+            files = {
+                "test.hs" = ''
+                    main = putStrLn "OK"
+                '';
+            };
+            args = [];
+            stdin = "";
+            packages = [];
+            main = "test.hs";
+        })
+    ];
+}