premake5.lua

-- Option to allow copying the DLL file to a custom folder after build
newoption {
	trigger = "copy-to",
	description = "Optional, copy the DLL to a custom folder after build, define the path here if wanted.",
	value = "PATH"
}

newoption {
	trigger = "no-new-structure",
	description = "Do not use new virtual path structure (separating headers and source files)."
}

newaction {
	trigger = "version",
	description = "Returns the version string for the current commit of the source code.",
	onWorkspace = function(wks)
		-- get revision number via git
		local proc = assert(io.popen("git rev-list --count HEAD", "r"))
		local revNumber = assert(proc:read('*a')):gsub("%s+", "")
		proc:close()

		print(revNumber)
		os.exit(0)
	end
}

newaction {
	trigger = "generate-buildinfo",
	description = "Sets up build information file like version.h.",
	onWorkspace = function(wks)
		-- get revision number via git
		local proc = assert(io.popen("git rev-list --count HEAD", "r"))
		local revNumber = assert(proc:read('*a')):gsub("%s+", "")
		proc:close()

		-- get old version number from version.hpp if any
		local oldRevNumber = "(none)"
		local oldVersionHeader = io.open(wks.location .. "/src/version.hpp", "r")
		if oldVersionHeader ~=nil then
			local oldVersionHeaderContent = assert(oldVersionHeader:read('*a'))
			oldRevNumber = string.match(oldVersionHeaderContent, "#define REVISION (%d+)")
			if oldRevNumber == nil then
				-- old version.hpp format?
				oldRevNumber = "(none)"
			end
		end

		-- generate version.hpp with a revision number if not equal
		if oldRevNumber ~= revNumber then
			print ("Update " .. oldRevNumber .. " -> " .. revNumber)
			local versionHeader = assert(io.open(wks.location .. "/src/version.hpp", "w"))
			versionHeader:write("/*\n")
			versionHeader:write(" * Automatically generated by premake5.\n")
			versionHeader:write(" * Do not touch, you fucking moron!\n")
			versionHeader:write(" */\n")
			versionHeader:write("\n")
			versionHeader:write("#define REVISION " .. revNumber .. "\n")
			versionHeader:close()
		end
	end
}


require("deps/iw4-open-formats")
	
workspace "iw3-exp"
	location "./build"
	objdir "%{wks.location}/obj"
	targetdir "%{wks.location}/bin/%{cfg.buildcfg}"
	buildlog "%{wks.location}/obj/%{cfg.architecture}/%{cfg.buildcfg}/%{prj.name}/%{prj.name}.log"
	configurations { "Debug", "Release" }
	architecture "x32"
	platforms "x86"

	buildoptions "/std:c++latest"
	systemversion "latest"
	
	defines { "_SILENCE_ALL_CXX17_DEPRECATION_WARNINGS" }

	configuration "windows"
		defines { "_WINDOWS", "WIN32" }
		staticruntime "On"
		
		if symbols ~= nil then
			symbols "On"
		else
			flags { "Symbols" }
		end

	configuration "Release"
		defines { "NDEBUG" }
		flags { "MultiProcessorCompile", "LinkTimeOptimization", "No64BitChecks" }
		optimize "Full"

	configuration "Debug"
		defines { "DEBUG", "_DEBUG" }
		flags { "MultiProcessorCompile", "No64BitChecks" }
		optimize "Debug"

	project "iw3x"
		kind "SharedLib"
		language "C++"
		cppdialect  "C++20"
	
		files {
			"./src/**.rc",
			"./src/**.hpp",
			"./src/**.cpp",
		}
		includedirs {
			"%{prj.location}/src",
			"./src",
			
			"./deps/rapidjson/include"
		}
		resincludedirs {
			"$(ProjectDir)src" -- fix for VS IDE
		}
		
		iw4_open_formats.import()

		-- Pre-compiled header
		pchheader "STDInclude.hpp" -- must be exactly same as used in #include directives
		pchsource "src/STDInclude.cpp" -- real path
		buildoptions { "/Zm100 -Zm100" }

		-- Virtual paths
		if not _OPTIONS["no-new-structure"] then
			vpaths {
				["Headers/*"] = { "./src/**.hpp" },
				["Sources/*"] = { "./src/**.cpp" },
				["Resource/*"] = { "./src/**.rc" },
			}
		end

		vpaths {
			["Docs/*"] = { "**.txt","**.md" },
		}
		
		-- Pre-build
		prebuildcommands {
			"cd %{_MAIN_SCRIPT_DIR}",
			"tools\\premake5 generate-buildinfo"
		}

		-- Post-build
		if _OPTIONS["copy-to"] then
			saneCopyToPath = string.gsub(_OPTIONS["copy-to"] .. "\\", "\\\\", "\\")
			postbuildcommands {
				"copy /y \"$(TargetDir)*.dll\" \"" .. saneCopyToPath .. "\""
			}
		end

		-- Specific configurations
		flags { "UndefinedIdentifiers" }
		warnings "Extra"

		configuration "Release"
			flags { "FatalCompileWarnings" }
		configuration {}

group "External Dependencies"
iw4_open_formats.project()