haredo: wrap program with a shell

The program relies on the presence of a shell, specifically `sh`, on its
PATH[1].

Also set `enableParallelChecking` to true, which can speed up the build
proccess significantly, specially when using emulated native compilation
through `binfmt`.

[1]: 34136cfca3/item/src/haredo.ha (L282)

pkgs/by-name/ha/haredo/package.nix

@@ -4,6 +4,8 @@
 , hare
 , scdoc
 , nix-update-script
+, makeWrapper
+, bash
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "haredo";
@@ -20,9 +22,16 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [
     hare
+    makeWrapper
     scdoc
   ];
 
+  enableParallelChecking = true;
+
+  doCheck = true;
+
+  dontConfigure = true;
+
   preBuild = ''
     HARECACHE="$(mktemp -d --tmpdir harecache.XXXXXXXX)"
     export HARECACHE
@@ -40,7 +49,7 @@ stdenv.mkDerivation (finalAttrs: {
   checkPhase = ''
     runHook preCheck
 
-    ./bin/haredo test
+    ./bin/haredo ''${enableParallelChecking:+-j$NIX_BUILD_CORES} test
 
     runHook postCheck
   '';
@@ -53,8 +62,10 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
-  dontConfigure = true;
-  doCheck = true;
+  postFixup = ''
+    wrapProgram $out/bin/haredo \
+      --prefix PATH : "${lib.makeBinPath [bash]}"
+  '';
 
   setupHook = ./setup-hook.sh;