Add ci-cleanup dev tool

dev/ci-cleanup.py

@@ -0,0 +1,28 @@
+# coding: utf-8
+from __future__ import unicode_literals, division, absolute_import, print_function
+
+import os
+import shutil
+
+from . import build_root, other_packages
+
+
+def run():
+    """
+    Cleans up CI dependencies - used for persistent GitHub Actions
+    Runners since they don't clean themselves up.
+    """
+
+    print("Removing ci dependencies")
+    deps_dir = os.path.join(build_root, 'modularcrypto-deps')
+    if os.path.exists(deps_dir):
+        shutil.rmtree(deps_dir, ignore_errors=True)
+
+    print("Removing modularcrypto packages")
+    for other_package in other_packages:
+        pkg_dir = os.path.join(build_root, other_package)
+        if os.path.exists(pkg_dir):
+            shutil.rmtree(pkg_dir, ignore_errors=True)
+    print()
+
+    return True