chore: write header with git version

tools/scripts/version.lua

@@ -0,0 +1,36 @@
+local BuildSubFolderFolder = "premake"
+local HeaderFileName = "GitVersion.h"
+
+function GetGitVersion()
+    result, errorCode = os.outputof("git describe --tags")
+
+    if errorCode == 0 then
+        return result
+    end
+
+    return "Unknown"
+end
+
+function GetVersionHeaderFolder()
+    return path.join(BuildFolder(), BuildSubFolderFolder)
+end
+
+function WriteVersionHeader()
+    local folder = GetVersionHeaderFolder()
+    local file = path.join(folder, HeaderFileName)
+    local content = string.format([[
+#pragma once
+
+#define GIT_VERSION "%s"
+    ]], GetGitVersion())
+
+    if os.isdir(folder) ~= True then
+        os.mkdir(folder)
+    end
+
+    local ok, err = os.writefile_ifnotequal(content, file)
+
+    if ok == -1 then
+        error("Could not create version file: " .. err)
+    end
+end