pkgs/ultimatepp: add uppPackage builder

pkgs/by-name/ul/ultimatepp/buildUppPackage.nix

@@ -0,0 +1,81 @@
+{
+  lib,
+  pkg-config,
+  stdenv,
+  ultimatepp,
+}:
+
+{
+  assembly ? ".",
+  extraAssemblies ? [],
+  includeUppsrcAssembly ? true,
+  package,
+  flags ? [],
+  buildMethod ? if stdenv.cc.isClang then "CLANG" else "GCC",
+  buildShared ? false,
+  ...
+}@args:
+
+let
+  flagsString = lib.optionalString (flags != []) ( "+" + lib.concatStringsSep "," flags);
+  output = if buildShared then "lib/${package}.so" else "bin/${package}";
+in
+
+stdenv.mkDerivation (self: {
+  nativeBuildInputs = [
+    pkg-config
+    ultimatepp
+  ] ++ args.nativeBuildInputs or [];
+
+  buildInputs = ultimatepp.uppsrcDependencies ++ args.buildInputs or [];
+
+  assemblies = lib.concatStringsSep "," (
+    lib.singleton assembly
+    ++ extraAssemblies
+    ++ lib.optional includeUppsrcAssembly "${ultimatepp.src}/uppsrc"
+  );
+
+  postUnpack = ''
+    mkdir -p .home
+    export HOME=$(realpath .home)
+  '';
+
+  UPP_NO_BUILD_INFO = true;
+
+  # https://www.ultimatepp.org/app$ide$umk$en-us.html
+  # s - use shared libraries
+  # S - use shared libraries and build shared libraries
+  # u - use target directory
+  # v - verbose
+  # r - release mdode
+
+  # FIXME: writing to $out should be done in the install phase
+  buildPhase = ''
+    runHook preBuild
+
+    mkdir -p $out/${if buildShared then "lib" else "bin"}
+
+    umk \
+      "$assemblies" \
+      ${lib.escapeShellArg package} \
+      ${buildMethod} \
+      -${if buildShared then "S" else "s"}uvr \
+      ${flagsString} \
+      $out/${output}
+
+    runHook postBuild
+  '';
+
+  # Don't run installPhase unless the user explicitly provides it
+  dontInstall = !lib.hasAttr "installPhase" args;
+} // lib.removeAttrs args [
+  "assembly"
+  "extraAssemblies"
+  "includeUppsrcAssembly"
+  "package"
+  "flags"
+  "buildMethod"
+  "buildShared"
+  "nativeBuildInputs"
+  "buildInputs"
+])