--
-- Premake 4.x build configuration script
-- 

if (_ACTION == "vs2002" or _ACTION == "vs2003") then
	error(
		"\nBecause of compiler limitations, Visual Studio 2002 and 2003 aren't able to\n" ..
		"build this version of Premake. Use the free Visual Studio Express instead.", 0)
end


solution "Premake4"
	configurations { "Release", "Debug" }


project "Premake4"
	targetname  "premake4"
	language    "C"
	kind        "ConsoleApp"
	flags       { "No64BitChecks", "ExtraWarnings", "FatalWarnings" }	
	includedirs { "src/host/lua-5.1.2/src" }

	files 
	{
		"src/**.h", "src/**.c", "src/**.lua", "src/**.tmpl",
		"tests/**.lua"
	}

	excludes
	{
		"src/premake.lua",
		"src/host/lua-5.1.2/src/lua.c",
		"src/host/lua-5.1.2/src/luac.c",
		"src/host/lua-5.1.2/src/print.c",
		"src/host/lua-5.1.2/**.lua",
		"src/host/lua-5.1.2/etc/*.c"
	}
		
	configuration "Debug"
		targetdir   "bin/debug"
		defines     "_DEBUG"
		flags       { "Symbols" }
		
	configuration "Release"
		targetdir   "bin/release"
		defines     "NDEBUG"
		flags       { "OptimizeSize", "NoFramePointer" }

	configuration "vs.*"
		defines     { "_CRT_SECURE_NO_WARNINGS" }




--
-- A more thorough cleanup
--
	
	function onclean()
		os.rmdir("bin")
	end



--
-- "Compile" action compiles scripts to bytecode and embeds into a static
-- data buffer in src/host/bytecode.c.
--

	local function dumpfile(out, fname)
		local func = loadfile(fname)			
		local dump = string.dump(func)
		local len = string.len(dump)
		out:write("\t\"")
		for i=1,len do
			out:write(string.format("\\%03o", string.byte(dump, i)))
		end
		out:write("\",\n")
		return len
	end

	local function dumptmpl(out, fname)
		local f = io.open(fname)
		local tmpl = f:read("*a")
		f:close()

		local name = path.getbasename(fname)
		local dump = "_TEMPLATES."..name.."=premake.loadtemplatestring('"..name.."',[["..tmpl.."]])"
		local len = string.len(dump)
		out:write("\t\"")
		for i=1,len do
			out:write(string.format("\\%03o", string.byte(dump, i)))
		end
		out:write("\",\n")
		return len
	end				
	
	local function docompile()
		local sizes = { }

		scripts, templates, actions = dofile("src/_manifest.lua")
		table.insert(scripts, "_premake_main.lua")
		
		local out = io.open("src/host/bytecode.c", "w+b")
		out:write("/* Precompiled bytecodes for built-in Premake scripts */\n")
		out:write("/* To regenerate this file, run `premake --compile` (Premake 3.x) */\n\n")

		out:write("const char* builtin_bytecode[] = {\n")
		
		for i,fn in ipairs(scripts) do
			print(fn)
			s = dumpfile(out, "src/"..fn)
			table.insert(sizes, s)
		end

		for i,fn in ipairs(templates) do
			print(fn)
			s = dumptmpl(out, "src/"..fn)
			table.insert(sizes, s)
		end
		
		for i,fn in ipairs(actions) do
			print(fn)
			s = dumpfile(out, "src/"..fn)
			table.insert(sizes, s)
		end
		
		out:write("};\n\n");
		out:write("int builtin_sizes[] = {\n")

		for i,v in ipairs(sizes) do
			out:write("\t"..v..",\n")
		end

		out:write("\t0\n};\n");		
		out:close()
		
		print("Done.")	
	end


	premake.actions["compile"] = {
		description = "Compile scripts to bytecode and embed in bytecode.c",
		execute     = docompile,
	}