ghcWithPackages: expose targetPrefix; tests.haskell.ghcWithPackages: verify... (7caff6e6) · Commits · nix / nixpkgs

pkgs/development/haskell-modules/with-packages-wrapper.nix

+1 −1

Original line number	Diff line number	Diff line
		@@ -178,7 +178,7 @@ else
		+ postBuild;
		preferLocalBuild = true;
		passthru = {
		inherit (ghc) version meta;
		inherit (ghc) version meta targetPrefix;

		hoogle = hoogleWithPackages';

+26 −5

Original line number	Diff line number	Diff line
		{
		lib,
		runCommand,
		runCommandCC,
		haskellPackages,
		}:

		@@ -21,16 +22,19 @@ lib.recurseIntoAttrs {

		# See: https://github.com/NixOS/nixpkgs/pull/224542
		regression-224542 =
		let
		ghc = haskellPackages.ghcWithPackages (hsPkgs: [
		hsPkgs.hspec
		]);
		in
		runCommand "regression-224542"
		{
		buildInputs = [
		(haskellPackages.ghcWithPackages (hsPkgs: [
		hsPkgs.hspec
		]))
		nativeBuildInputs = [
		ghc
		];
		}
		''
		ghc --interactive \
		${ghc.targetPrefix}ghc --interactive \
		-Werror=unrecognised-warning-flags \
		-Werror=missed-extra-shared-lib \
		2>&1 \
		@@ -45,4 +49,21 @@ lib.recurseIntoAttrs {

		touch $out
		'';

		use-llvm =
		let
		ghc = (haskellPackages.ghcWithPackages.override { useLLVM = true; }) (_: [ ]);
		in
		runCommandCC "ghc-with-packages-use-llvm"
		{
		nativeBuildInputs = [ ghc ];
		}
		''
		echo 'main = pure ()' > test.hs
		# -ddump-llvm is unnecessary, but nice for visual feedback in the build log
		${ghc.targetPrefix}ghc --make -fllvm -keep-llvm-files -ddump-llvm test.hs
		# Did we actually use the LLVM backend?
		test -f test.ll
		touch $out
		'';
		}