diff --git a/rpkg.macros b/rpkg.macros
new file mode 100644
index 0000000000..b064d67006
--- /dev/null
+++ b/rpkg.macros
@@ -0,0 +1,4 @@
+function git_commit_no {
+	commits=$(curl -s 'https://api.github.com/repos/FreeCAD/FreeCAD/compare/120ca87015...master' | grep "ahead_by" | sed -s 's/ //g' | sed -s 's/"ahead_by"://' | sed -s 's/,//')
+	echo -n $((commits + 1))
+}