diff --git a/py/py-version.sh b/py/py-version.sh
new file mode 100755
index 0000000..f574b57
--- /dev/null
+++ b/py/py-version.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+git_hash="$(git rev-parse --short HEAD 2> /dev/null || echo unknown)"
+git_files_are_clean=1
+# Check if there are any modified files.
+git diff --no-ext-diff --quiet --exit-code 2> /dev/null || git_files_are_clean=0
+# Check if there are any staged files.
+git diff-index --cached --quiet HEAD -- 2> /dev/null || git_files_are_clean=0
+if [ "${git_files_are_clean}" != "1" ]; then
+    git_hash="${git_hash}-dirty"
+fi
+cat <<EOF
+// This file was generated by py/py-version.sh
+#define MICROPY_GIT_HASH "${git_hash}"
+#define MICROPY_BUILD_DATE "$(date '+%Y-%m-%d')"
+EOF