opentxl: init wrapper

pkgs/by-name/op/opentxl-unwrapped/package.nix

@@ -72,8 +72,11 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
-  passthru.tests.factorial = callPackage ./factorial-test.nix { opentxl = finalAttrs.finalPackage; };
-  passthru.updateScript = nix-update-script { };
+  passthru = {
+    inherit osOption;
+    tests.factorial = callPackage ./factorial-test.nix { opentxl = finalAttrs.finalPackage; };
+    updateScript = nix-update-script { };
+  };
 
   meta = {
     description = "Open-source compiler for the Txl language";

pkgs/by-name/op/opentxl/package.nix

@@ -0,0 +1,69 @@
+{
+  lib,
+  stdenv,
+  makeWrapper,
+  opentxl-unwrapped,
+  targetPackages,
+}:
+let
+  inherit (targetPackages.stdenv.cc) targetPrefix;
+
+  crossCompiling = stdenv.hostPlatform != stdenv.targetPlatform;
+  targetOpentxl = if !crossCompiling then opentxl-unwrapped else targetPackages.opentxl-unwrapped;
+in
+stdenv.mkDerivation (finalAttrs: {
+  pname = "${targetPrefix}opentxl-wrapper";
+  inherit (opentxl-unwrapped) version;
+  preferLocalBuild = true;
+  strictDeps = true;
+
+  dontUnpack = true;
+  dontConfigure = true;
+  dontBuild = true;
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+
+    # Wrap compiler
+    makeWrapper ${opentxl-unwrapped}/bin/txlc \
+      $out/bin/${targetPrefix}txlc \
+      --set TXLLIB ${opentxl-unwrapped}/lib \
+      --set BUILD_TXLLIB ${opentxl-unwrapped}/lib \
+      --set TARGET_TXLLIB ${targetOpentxl}/lib \
+      --set CC ${targetPackages.stdenv.cc}/bin/${targetPrefix}cc \
+      --set OS ${opentxl-unwrapped.osOption stdenv.targetPlatform}
+    ${
+      # For convenience, if there is a target prefix, create a symlink named txlc
+      lib.optionalString (targetPrefix != "") ''
+        ln -s $out/bin/${targetPrefix}txlc $out/bin/txlc
+      ''
+    }
+
+    # Wrap other scripts
+    for name in txl2c txlp; do
+      makeWrapper "${opentxl-unwrapped}/bin/$name" \
+        "$out/bin/$name" \
+        --set-default TXLLIB ${opentxl-unwrapped}/lib
+    done
+
+    # Link to binaries that don't need wrapping
+    for name in txl txldb; do
+      ln -s "${opentxl-unwrapped}/bin/$name" "$out/bin/$name"
+    done
+
+    runHook postInstall
+  '';
+
+  passthru = {
+    unwrapped = opentxl-unwrapped;
+    inherit (opentxl-unwrapped.passthru) tests;
+  };
+
+  meta = opentxl-unwrapped.meta // {
+    platforms = lib.platforms.unix;
+  };
+})