From e6d38e68fbbaca315edffbd8f07f3edff6e5f561 Mon Sep 17 00:00:00 2001
From: /dev/urandom <iw4x-dev-urandom@protonmail.com>
Date: Thu, 31 Dec 2015 03:59:33 +0100
Subject: [PATCH] Add version.hpp generation. Will trigger pre-build.

---
 premake5.lua       | 38 ++++++++++++++++++++++++++++++++++++++
 src/STDInclude.hpp |  2 ++
 2 files changed, 40 insertions(+)

diff --git a/premake5.lua b/premake5.lua
index 19af224f..7733f1fb 100644
--- a/premake5.lua
+++ b/premake5.lua
@@ -5,6 +5,38 @@ newoption {
 	value = "PATH"
 }
 
+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 = -1
+		local oldVersionHeader = io.open(wks.location .. "/version.hpp", "r")
+		if oldVersionHeader ~=nil then
+			local oldVersionHeaderContent = assert(oldVersionHeader:read('*a'))
+			oldRevNumber = string.match(oldVersionHeaderContent, "#define REVISION (%d+)")
+		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 .. "/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
+}
+
 solution "iw4x"
 	location ("./build")
 	configurations { "Normal" }
@@ -13,6 +45,7 @@ solution "iw4x"
 		kind "SharedLib"
 		language "C++"
 		files { "./src/**.hpp", "./src/**.cpp" }
+		includedirs { "%{prj.location}" }
 		toolset "msc" -- only support Microsoft's compiler
 
 		configuration "Normal"
@@ -25,6 +58,11 @@ solution "iw4x"
 			["Docs/*"] = {"**.txt","**.md"}
 		}
 
+		prebuildcommands {
+			"cd %{_MAIN_SCRIPT_DIR}",
+			"premake5 generate-buildinfo"
+		}
+
 		if _OPTIONS["copy-to"] then
 			saneCopyToPath = string.gsub(_OPTIONS["copy-to"] .. "\\", "\\\\", "\\")
 			postbuildcommands {
diff --git a/src/STDInclude.hpp b/src/STDInclude.hpp
index b789173f..fe492110 100644
--- a/src/STDInclude.hpp
+++ b/src/STDInclude.hpp
@@ -19,6 +19,8 @@
 #include <algorithm>
 #include <regex>
 
+#include <version.hpp>
+
 #include "Utils\Utils.hpp"
 #include "Utils\WebIO.hpp"
 #include "Utils\Hooking.hpp"