premake5.lua

gitVersioningCommand = "git describe --tags --dirty --always"
gitCurrentBranchCommand = "git symbolic-ref -q --short HEAD"

-- Quote the given string input as a C string
function cstrquote(value)
	if value == nil then
		return "\"\""
	end
	result = value:gsub("\\", "\\\\")
	result = result:gsub("\"", "\\\"")
	result = result:gsub("\n", "\\n")
	result = result:gsub("\t", "\\t")
	result = result:gsub("\r", "\\r")
	result = result:gsub("\a", "\\a")
	result = result:gsub("\b", "\\b")
	result = "\"" .. result .. "\""
	return result
end

-- Converts tags in "vX.X.X" format and given revision number Y to an array of numbers {X,X,X,Y}.
-- In the case where the format does not work fall back to padding with zeroes and just ending with the revision number.
-- partscount can be either 3 or 4.
function vertonumarr(value, vernumber, partscount)
	vernum = {}
	for num in string.gmatch(value or "", "%d+") do
		if #vernum < 3 then
			table.insert(vernum, tonumber(num))
		end
	end
	while #vernum < 3 do
		table.insert(vernum, 0)
	end
	if #vernum < partscount then
		table.insert(vernum, tonumber(vernumber))
	end
	return vernum
end

function getbaseversion(tagName)
	if tagName == nil or tagName == "" then
		return "0.0.1"
	end

	local major, minor, patch = string.match(tagName, "[vV]?(%d+)%.(%d+)%.(%d+)")
	if major ~= nil and minor ~= nil and patch ~= nil then
		return major .. "." .. minor .. "." .. patch
	end

	return "0.0.1"
end

function readbuildcounter(path)
	local file = io.open(path, "r")
	if file == nil then
		return 0
	end

	local rawValue = file:read('*a') or ""
	local cleanedValue = rawValue:gsub("%s+", "")
	local value = tonumber(cleanedValue)
	file:close()

	if value == nil then
		return 0
	end

	return value
end

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

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 old version number from version.hpp if any
		local oldVersion = "(none)"
		local oldVersionProduct = ""
		local oldVersionBuild = ""
		local oldVersionHeader = io.open(wks.location .. "/src/version.h", "r")
		if oldVersionHeader ~= nil then
			local oldVersionHeaderContent = assert(oldVersionHeader:read('*l'))
			while oldVersionHeaderContent do
				m = string.match(oldVersionHeaderContent, "#define GIT_DESCRIBE (.+)%s*$")
				if m ~= nil then
						oldVersion = m
				end

				m = string.match(oldVersionHeaderContent, "#define VERSION_PRODUCT \"([^\"]*)\"%s*$")
				if m ~= nil then
					oldVersionProduct = m
				end

				m = string.match(oldVersionHeaderContent, "#define VERSION_BUILD \"([^\"]*)\"%s*$")
				if m ~= nil then
					oldVersionBuild = m
				end

				oldVersionHeaderContent = oldVersionHeader:read('*l')
			end

			oldVersionHeader:close()
		end

		-- get current version via git
		local proc = assert(io.popen(gitVersioningCommand, "r"))
		local gitDescribeOutput = assert(proc:read('*a')):gsub("%s+", "")
		proc:close()

		-- generate version.hpp with a revision number if not equal
		gitDescribeOutputQuoted = cstrquote(gitDescribeOutput)
		local proc = assert(io.popen("git describe --tags --abbrev=0"))
		local tagName = proc:read('*l')
		proc:close()

		local proc = assert(io.popen("git rev-list --count HEAD", "r"))
		local revNumber = assert(proc:read('*a')):gsub("%s+", "")
		proc:close()

		local baseVersion = getbaseversion(tagName)

		local buildCounterPath = wks.location .. "/src/build_counter.txt"
		local buildCounter = readbuildcounter(buildCounterPath) + 1
		local buildNumber = tostring(buildCounter)

		if oldVersion ~= gitDescribeOutputQuoted or oldVersionProduct ~= baseVersion or oldVersionBuild ~= buildNumber then
			-- get current git hash and write to version.txt (used by the preliminary updater)
			-- TODO - remove once proper updater and release versioning exists
			local proc = assert(io.popen("git rev-parse HEAD", "r"))
			local gitCommitHash = assert(proc:read('*a')):gsub("%s+", "")
			proc:close()

			-- get whether this is a clean revision (no uncommitted changes)
			proc = assert(io.popen("git status --porcelain", "r"))
			local revDirty = (assert(proc:read('*a')) ~= "")
			if revDirty then revDirty = 1 else revDirty = 0 end
			proc:close()

			-- get current branch name
			proc = assert(io.popen("git branch --show-current"))
			local branchName = proc:read('*l')

			-- branch for ci
			if branchName == nil or branchName == '' then
				proc = assert(io.popen("git show -s --pretty=%d HEAD"))
				local branchInfo = proc:read('*l')
				m = string.match(branchInfo, ".+,.+, ([^)]+)")
				if m ~= nil then
					branchName = m
				end
			end

			if branchName == nil then
				branchName = "develop"
			end

			print("Detected branch: " .. branchName)

			print ("Update " .. oldVersion .. " -> " .. gitDescribeOutputQuoted)

			local buildCounterFile = assert(io.open(buildCounterPath, "w"))
			buildCounterFile:write(buildNumber)
			buildCounterFile:close()

			-- write to version.txt for preliminary updater
			-- NOTE - remove this once we have a proper updater and proper release versioning
			local versionFile = assert(io.open(wks.location .. "/version.txt", "w"))
			versionFile:write(gitCommitHash)
			versionFile:close()

			-- write version header
			local versionHeader = assert(io.open(wks.location .. "/src/version.h", "w"))
			versionHeader:write("/*\n")
			versionHeader:write(" * Automatically generated by premake5.\n")
			versionHeader:write(" * Do not touch!\n")
			versionHeader:write(" */\n")
			versionHeader:write("\n")
			versionHeader:write("#define GIT_DESCRIBE " .. gitDescribeOutputQuoted .. "\n")
			versionHeader:write("#define GIT_DIRTY " .. revDirty .. "\n")
			versionHeader:write("#define GIT_HASH " .. cstrquote(gitCommitHash) .. "\n")
			versionHeader:write("#define GIT_TAG " .. cstrquote(tagName) .. "\n")
			versionHeader:write("#define GIT_BRANCH " .. cstrquote(branchName) .. "\n")
			versionHeader:write("\n")
			versionHeader:write("// Version transformed for RC files\n")
			versionHeader:write("#define VERSION_PRODUCT_RC " .. table.concat(vertonumarr(baseVersion, revNumber, 3), ",") .. "\n")
			versionHeader:write("#define VERSION_PRODUCT " .. cstrquote(baseVersion) .. "\n")
			versionHeader:write("#define VERSION_BUILD " .. cstrquote(buildNumber) .. "\n")
			versionHeader:write("#define VERSION_FILE_RC " .. table.concat(vertonumarr(baseVersion, buildNumber, 4), ",") .. "\n")
			versionHeader:write("#define VERSION_FILE " .. cstrquote(table.concat(vertonumarr(baseVersion, buildNumber, 4), ".")) .. "\n")
			versionHeader:write("\n")
			versionHeader:write("// Alias definitions\n")
			versionHeader:write("#define VERSION GIT_DESCRIBE\n")
			versionHeader:write("#define SHORTVERSION VERSION_PRODUCT\n")
			versionHeader:close()
			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!\n")
			versionHeader:write(" *\n")
			versionHeader:write(" * This file exists for reasons of complying with our coding standards.\n")
			versionHeader:write(" *\n")
			versionHeader:write(" * The Resource Compiler will ignore any content from C++ header files if they're not from STDInclude.hpp.\n")
			versionHeader:write(" * That's the reason why we now place all version info in version.h instead.\n")
			versionHeader:write(" */\n")
			versionHeader:write("\n")
			versionHeader:write("#include \".\\version.h\"\n")
			versionHeader:close()
		end
	end
}

dependencies = {
	basePath = "./deps"
}

function dependencies.load()
	dir = path.join(dependencies.basePath, "premake/*.lua")
	deps = os.matchfiles(dir)

	for i, dep in pairs(deps) do
		dep = dep:gsub(".lua", "")
		require(dep)
	end
end

function dependencies.imports()
	for i, proj in pairs(dependencies) do
		if type(i) == 'number' then
			proj.import()
		end
	end
end

function dependencies.projects()
	for i, proj in pairs(dependencies) do
		if type(i) == 'number' then
			proj.project()
		end
	end
end

dependencies.load()

workspace "consolation-client"
	startproject "consolation-client"
	location "./build"
	objdir "%{wks.location}/obj/%{cfg.buildcfg}"
	targetdir "%{wks.location}/bin/%{cfg.buildcfg}"

	-- i guess ill keep this for anyone wanting it lol
	buildlog "%{wks.location}/obj/%{cfg.architecture}/%{cfg.buildcfg}/%{prj.name}/%{prj.name}.log"

	configurations { "Debug", "Release", }

	language "C++"
	cppdialect "C++20"

	architecture "x86"
	platforms "Win32"

	systemversion "latest"
	symbols "On"
	staticruntime "On"
	editandcontinue "Off"
	warnings "Extra"
	characterset "ASCII"

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

	flags
	{
		"NoIncrementalLink",
		"NoMinimalRebuild",
		"MultiProcessorCompile",
		"No64BitChecks"
	}
	
	filter "platforms:Win*"
		defines { "_WINDOWS", "WIN32" }
	filter {}
	
	filter "configurations:Release"
		optimize "Full"
		buildoptions { "/Os" }
		defines { "NDEBUG" }
		flags { "FatalCompileWarnings", "LinkTimeOptimization" }
	filter {}

	filter "configurations:Debug"
		optimize "Debug"
		defines { "DEBUG", "_DEBUG" }
	filter  {}

	project "d3d9" -- dll we are using to hook into the game
		kind "SharedLib"
		language "C++"

		files 
		{
			"./src/**.h",
			"./src/**.hpp",
			"./src/**.cpp",
			"./src/**.rc"
		}

		includedirs 
		{
			"%{prj.location}/src",
			"./src",
		}

		resincludedirs 
		{
			"$(ProjectDir)src" -- fix for VS IDE
		}
	
		pchheader "std_include.hpp"
		pchsource "src/std_include.cpp"

		prebuildcommands {"pushd %{_MAIN_SCRIPT_DIR}", "tools\\premake5 generate-buildinfo", "popd"}
		
		if _OPTIONS["copy-to"] then
			postbuildcommands {"copy /y \"$(TargetPath)\" \"" .. _OPTIONS["copy-to"] .. "\""}
		end

		dependencies.imports()

	group "Dependencies"
		dependencies.projects()