distrho-ports: add build options (#458405)

pkgs/by-name/di/distrho-ports/package.nix

@@ -16,12 +16,18 @@
 
   # empty means build all available plugins
   plugins ? [ ],
+
+  buildVST3 ? true,
+  buildLV2 ? true,
+  buildVST2 ? true,
 }:
 
 let
   rpathLibs = [
     fftwFloat
   ];
+
+  mesonPlugins = lib.mesonOption "plugins" "[${lib.concatMapStringsSep "," (x: "\"${x}\"") plugins}]";
 in
 stdenv.mkDerivation {
   pname = "distrho-ports";
@@ -52,19 +58,27 @@ stdenv.mkDerivation {
 
   env.NIX_CFLAGS_COMPILE = toString [ "-fpermissive" ];
 
-  postFixup = lib.optionalString (lib.elem "vitalium" plugins || plugins == [ ]) ''
-    for file in \
-      $out/lib/lv2/vitalium.lv2/vitalium.so \
-      $out/lib/vst/vitalium.so \
-      $out/lib/vst3/vitalium.vst3/Contents/x86_64-linux/vitalium.so
-    do
-      patchelf --set-rpath "${lib.makeLibraryPath rpathLibs}:$(patchelf --print-rpath $file)" $file
-    done
-  '';
+  postFixup =
+    let
+      files = [
+        (lib.optionalString buildLV2 "$out/lib/lv2/vitalium.lv2/vitalium.so")
+        (lib.optionalString buildVST2 "$out/lib/vst/vitalium.so")
+        (lib.optionalString buildVST3 "$out/lib/vst3/vitalium.vst3/Contents/x86_64-linux/vitalium.so")
+      ];
+    in
+    lib.optionalString (lib.elem "vitalium" plugins || plugins == [ ]) ''
+      for file in ${lib.concatMapStringsSep " \\\n" (x: "${x}") files}
+      do
+        patchelf --set-rpath "${lib.makeLibraryPath rpathLibs}:$(patchelf --print-rpath $file)" $file
+      done
+    '';
 
-  mesonFlags = lib.optional (plugins != [ ]) (
-    lib.mesonOption "plugins" "[${lib.concatMapStringsSep "," (x: "\"${x}\"") plugins}]"
-  );
+  mesonFlags = [
+    (lib.mesonBool "build-lv2" buildLV2)
+    (lib.mesonBool "build-vst2" buildVST2)
+    (lib.mesonBool "build-vst3" buildVST3)
+  ]
+  ++ lib.optional (plugins != [ ]) mesonPlugins;
 
   meta = {
     homepage = "http://distrho.sourceforge.net/ports";