Move auto_firmware_version.py to pio-scripts subdirectory

pio-scripts/auto_firmware_version.py

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Copyright (C) 2022 Thomas Basler and others
+#
+import pkg_resources
+
+Import("env")
+
+required_pkgs = {'dulwich'}
+installed_pkgs = {pkg.key for pkg in pkg_resources.working_set}
+missing_pkgs = required_pkgs - installed_pkgs
+
+if missing_pkgs:
+    env.Execute('"$PYTHONEXE" -m pip install dulwich')
+
+from dulwich import porcelain
+
+def get_firmware_specifier_build_flag():
+    try:
+        build_version = porcelain.describe('.')  # '.' refers to the repository root dir
+    except:
+        build_version = "g0000000"
+    build_flag = "-D AUTO_GIT_HASH=\\\"" + build_version + "\\\""
+    print ("Firmware Revision: " + build_version)
+    return (build_flag)
+
+env.Append(
+    BUILD_FLAGS=[get_firmware_specifier_build_flag()]
+)