common.lua

-- http://industriousone.com/scripting-reference --
-- https://bitbucket.org/premake/premake-dev/wiki --

dofile("settings.lua")

function checkdir(dir)
	if not os.isdir(dir) then
		error("Directory does not exist: "..dir)
	end
end


function dbg_hook(name)
	local f=_G[name]
	_G[name] = function(a,...)
		if type(a)=="string" then
			--print(name,"",a,...)
		else
			--print(name,"",unpack(a))
		end
		return f(a,...)
	end
end

dbg_hook "links"        
dbg_hook "targetdir"    
dbg_hook "location"     
dbg_hook "libdirs"      
dbg_hook "configuration"
dbg_hook "flags"        
dbg_hook "solution"     
dbg_hook "defines"      
dbg_hook "includedirs"  
dbg_hook "linkoptions"  
dbg_hook "project"      
dbg_hook "files"        
dbg_hook "targetname"   

local function fixdir(dir,nocheck) 
	dir = path.getabsolute(dir) 
	if not nocheck then
		checkdir(dir)
	end
	return dir
end

--Relative paths
GARRYSMOD_INCLUDES_PATH	= fixdir "gmod-module-base/include"
BACKWARDS_HEADERS  		= fixdir "backwards_headers"
HOOKING  				= fixdir "hooking"
SIGSCANNING 			= fixdir "sigscanning"
LUA51 					= fixdir "lua51"
LUAJIT 					= fixdir "luajit"
SOURCE_SDK				= fixdir (SOURCE_SDK)
SRCDS_DIR				= fixdir (SRCDS_DIR)
STEAMWORKS_SDK			= fixdir (STEAMWORKS_SDK)

PROJECT_FOLDER = os.get() .. "/" .. _ACTION

SOURCE_SDK_INCLUDES={
	SOURCE_SDK.."/public",
	SOURCE_SDK.."/public/engine",
	SOURCE_SDK.."/common",
	SOURCE_SDK.."/public/vstdlib",
	SOURCE_SDK.."/public/steam",
	SOURCE_SDK.."/public/tier0",
	SOURCE_SDK.."/public/tier1",
	SOURCE_SDK.."/tier1",
	SOURCE_SDK.."/public/game/server",
	SOURCE_SDK.."/game/shared",
	SOURCE_SDK.."/game/server",
	SOURCE_SDK.."/game/client",
}

function SOURCE_SDK_LINKS()
	local cfg = configuration()
	configuration 		"windows"
		links{"tier0","tier1","tier2","tier3","mathlib","steam_api","vstdlib"}

	configuration 		"linux"
		linkoptions {  -- :(
			SOURCE_SDK.."/lib/public/linux32/tier1.a",
			SOURCE_SDK.."/lib/public/linux32/tier2.a",
			SOURCE_SDK.."/lib/public/linux32/tier3.a",
			SOURCE_SDK.."/lib/public/linux32/mathlib.a",
			}
		links {"tier0_srv","vstdlib_srv","steam_api"}
	configuration(cfg.terms)
end

local include_helpers = {
	
	source_sdk={
		func = function(_)		
			libdirs{
				SOURCE_SDK.."/lib/public/linux32",
				SOURCE_SDK.."/lib/linux32",
				SOURCE_SDK.."/lib/public"
				}
			includedirs(SOURCE_SDK_INCLUDES)
		end,
	},
	gmod_sdk={
		func = function(_)
			includedirs{GARRYSMOD_INCLUDES_PATH}	
		end,
	},	
	
	backwards_headers={
		func = function(_)
			includedirs{BACKWARDS_HEADERS}
			libdirs{BACKWARDS_HEADERS}
		end,
	},
	
	hooking={
		func = function(_,i)
			includedirs{HOOKING}
			if i then
				files{HOOKING..'/hde.cpp'}
			end
		end,
	},
	
	sigscanning={
		func = function(_,i)
			includedirs{SIGSCANNING}
			if i then
				files{SIGSCANNING..'/symbolfinder.cpp'}
				configuration 		"windows"
					files{SIGSCANNING..'/sigscan.cpp'}
				configuration 		"linux"
					files{SIGSCANNING..'/memutils.cpp'}
			end
		end,
	},
	
	steamworks={
		func = function(_,i)
			includedirs{STEAMWORKS_SDK..'/public'}
			includedirs{STEAMWORKS_SDK..'/public/steam'}
			if i then
				libdirs	{
							STEAMWORKS_SDK..'/redistributable_bin',
							STEAMWORKS_SDK..'/redistributable_bin/linux32'
						}
			end
		end,
	},
	
	lua51={ -- gmod lua 5.1 compat
		func = function(_,i)
			includedirs{LUA51..'/src'}
			libdirs{LUA51} -- lua_shared
			if i then
				configuration 		"windows"
					links			{"lua_shared"}
				configuration 		"linux"
					-- massive hack, but it works just the way I wanted it to
					linkoptions		{"-Wl,-rpath='$$ORIGIN'"}
					linkoptions		{"garrysmod/bin/lua_shared_srv.so"}
					prelinkcommands	{"mkdir -p garrysmod/bin && ln -s -f "..SRCDS_DIR.."/garrysmod/bin/lua_shared_srv.so garrysmod/bin/lua_shared_srv.so "}
			end
		end,
	},
	luajit={ -- luajit
		func = function(_,i)
			includedirs{LUAJIT..'/src'}
			libdirs{LUAJIT..'/src'}
			if i then
				configuration 		"windows"
					libdirs{LUAJIT..'/src'}
					links_static			"lua51"
				configuration 		"linux"
					libdirs{LUAJIT..'/src'}
					links_static			"luajit"
			end
		end,
	},
	
}

function INCLUDES(what)
	local t = include_helpers[what]
	if not t then error("Not found: "..what) end
	local included = t.included
	print("Including "..what,included and "REINCLUDE!?!?" or "")
	t:func(included)
	t.included = true
	--Should we ?
	--configuration 		{}
end
function IsIncluded(what)
	local t = include_helpers[what]
	if not t then error("Not found: "..what) end
	local included = t.included
	return included or false
end
local runtime_required
function RequireRuntime()
	runtime_required = true
end

function SOLUTION(name)
	_SOLUTION_NAME=name
	solution	(name)
	language	("C++")
	location	(PROJECT_FOLDER)
	targetdir	"Release"
	
	if platforms then
		platforms { "x32" }
	end
	
	if optimize and DEBUG~=true then
		optimize"On"
	else
		optimize"Off"
	end

	-- debug symbols are always built in, DEBUG just makes them not be stripped
	flags		{"NoPCH","Symbols"}
	
	if vectorextensions then
		vectorextensions "SSE2"
	else
		flags {"EnableSSE2","EnableSSE"}
	end
	
	if not runtime_required then
		flags	{"StaticRuntime"}
	end
	
	configurations
	{ 
		"Release"
	}
	
end

local defaultlibs_required
function RequireDefaultlibs()
	defaultlibs_required = true
end
function WINDOWS()
	configuration	("windows")
		defines		{"COMPILER_MSVC32","WIN32","_WIN32","_WINDOWS"}		
		defines 	{'SERVER_BIN="server.dll"'}
		if not defaultlibs_required then
			linkoptions	{ "/nodefaultlib:\"libcmt\"", "/nodefaultlib:\"libcmtd\"" }
		end
end

function LINUX()
	configuration	("linux")
		defines 	{'SERVER_BIN="server_srv.so"'}
		defines 	{'LUA_SHARED="lua_shared_srv.so"'}
		defines 	{'LUA_SHARED_CLIENT="lua_shared.so"'}
		defines		{"COMPILER_GCC","POSIX","_POSIX","LINUX","_LINUX","GNUC","NO_MALLOC_OVERRIDE"}
		if not FUCKSYMS then
		linkoptions	{"-Wl,-z,defs"}
		end
		libdirs		{SRCDS_DIR..'/bin'}
		links		{"rt","dl"}
end


function PROJECT()
	project(_SOLUTION_NAME)
	targetname(_SOLUTION_NAME)
	
	kind	("SharedLib")		
	defines	{
				"GMMODULE",
				--"NO_HOOK_MALLOC",
				--LINUX? "NO_MALLOC_OVERRIDE",
				--"SOURCE_SDK=1",
				--"CLIENT_DLL",
				"VERSION_SAFE_STEAM_API_INTERFACES",
				"VECTOR",
				--"NO_STRING_T", -- breaks cbase.h for example
				--"NO_SDK",
				"_CRT_NONSTDC_NO_DEPRECATE",
				"_CRT_SECURE_NO_DEPRECATE",
				"RAD_TELEMETRY_DISABLED",
				"PROTECTED_THINGS_ENABLE",
				--"strncpy=use_Q_strncpy_instead",
				--"_snprintf=use_Q_snprintf_instead",
				--"fopen=dont_use_fopen",
			}

	if DEBUG ~= true then
		defines "NDEBUG"
	else
		defines "DEBUG"
	end

	files	{"src/*.cpp"}

	targetprefix			"gmsv_"

	if IsIncluded"backwards_headers" then
		files {BACKWARDS_HEADERS.."/*.cpp"}
	end
	
	configuration 			"windows"
		targetsuffix 		"_win32"
		
	configuration 			"linux"
		targetsuffix 		"_linux"
		targetextension 	".dll"
		if DEBUG~=true then
			postbuildcommands { "strip --keep-file-symbols --strip-debug -p %{cfg.linktarget.relpath}" }
		end

	project(_SOLUTION_NAME)
	
end

function links_static(what)
	linkoptions{"-Wl,-Bstatic,-l"..what..",-Bdynamic"}
end