How to manage MIDL configuration projet with lua ?

[JohPac]

Hi all,

I'm currently migrating projects Visual with ocx (MIDL) under premake.

In lua, when I add file .odl in files section, so ItemGroup/Midl is well add in vcxproj 👍

  <ItemGroup>
    <Midl Include="..\test.odl">
    </Midl>
  </ItemGroup>

But to compile it's missing in vcxproj : ItemDefinitionGroup/Midl to include TypeLibraryName test.tlb

for exemple, in original vcxproj (no generate with premake)

<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<Midl>
      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <MkTypLibCompatible>false</MkTypLibCompatible>
      <SuppressStartupBanner>true</SuppressStartupBanner>
      <TargetEnvironment>Win32</TargetEnvironment>
      <TypeLibraryName>$(ProjectDir)$(Configuration)\test.tlb</TypeLibraryName>
    </Midl>
</ItemDefinitionGroup>

I don't find in docs/Stack Overflow any info how to add this in lua configuration.

Can you confirme, that is it possible in the current version of premake 5.0b2 ?

Thx,

[samsinsane]

We only support excluding a .idl file from the build, you can see this here:

premake-core/modules/vstudio/vs2010_vcxproj.lua

Lines 959 to 980 in ff5328c

	---
	-- Midl group
	---
	m.categories.Midl = {
	name = "Midl",
	extensions = ".idl",
	priority = 8,
	emitFiles = function(prj, group)
	local fileCfgFunc = {
	m.excludedFromBuild
	}
	m.emitFiles(prj, group, "Midl", nil, fileCfgFunc, function(cfg)
	return cfg.system == p.WINDOWS
	end)
	end,
	emitFilter = function(prj, group)
	m.filterGroup(prj, group, "Midl")
	end
	}

PRs are welcome for expanding upon this, and if you're looking for a temporary workaround, you can use the override system with something like this:

require "vstudio"

local function someFileElement(cfg, file)
  premake.vstudio.vc2010.element("someFileElement", nil, "value")
end

local function someFileCfgElement(filecfg, condition)
  premake.vstudio.vc2010.element("someFileCfgElement", condition, "value")
end

premake.override(premake.vstudio.vc2010, "emitFiles", function (oldfn, prj, group, tag, fileFunc, fileCfgFunc, checkFunc)
  if tag == "Midl" then
    fileFunc = table.join(fileFunc or {}, {
      someFileElement,
    }

    fileCfgFunc = table.join(fileCfgFunc or {}, {
      someFileCfgElement,
    }
  end

  return oldfn(prj, group, tag, fileFunc, fileCfgFunc, checkFunc)
end)

someFileElement will emit an element for each file (like SupressStartUpBanner if you want it to always be true), while someFileCfgElement will emit an element for each file in each configuration (like TargetEnvironment if you're building for both Win32 and x64).

[JohPac]

Thank you for your advice, we try this ASAP