diff --git a/Tools/scripts/git-diff-ports.sh b/Tools/scripts/git-diff-ports.sh
new file mode 100755
index 000000000000..73ae0a8031a3
--- /dev/null
+++ b/Tools/scripts/git-diff-ports.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+#
+# MAINTAINER: yuri@FreeBSD.org
+
+set -e
+set -o pipefail
+
+export LC_ALL=C
+
+##
+## git-diff-ports.sh: returns the list of ports with uncommitted changes in the repository
+##
+
+# check that packaged dependencies are installed
+
+for dep in git; do
+	if ! which -s $dep; then
+		echo "error: the '$dep' dependency is missing"
+		if [ $dep == "git" ]; then
+			echo "... please install the 'git' package"
+		fi
+		exit 1
+	fi
+done
+
+
+# MAIN
+
+git diff HEAD "$@" |
+	grep "^diff " |
+	grep -v Mk/ |
+	grep -v Tools/ |
+	sed -E 's|diff --git a/||; s| .*||; s|([^/]+/[^/]+).*|\1|' |
+	sort |
+	uniq