X-Git-Url: http://git.scottworley.com/nix-pin-deps/blobdiff_plain/07fdf1857a827f51d951444ec7f4fd41dfdaa11e..9a38ce234bd1fb25907af6c3828c52cff0532661:/nix_pin_deps.py

diff --git a/nix_pin_deps.py b/nix_pin_deps.py
index 30aef6d..297f7c1 100644
--- a/nix_pin_deps.py
+++ b/nix_pin_deps.py
@@ -1,3 +1,10 @@
+# nix-pin-deps: gc-pin dependencies of a partially-built derivation
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation, version 3.
+
+
 from contextlib import contextmanager
 import json
 import os
@@ -96,6 +103,11 @@ def pinBuiltThings(thing: str,
         pinBuiltThings(dep, done, deps)
 
 
-dep_graph = getDeps(sys.argv[1])
-for root in dep_graph.roots:
-    pinBuiltThings(root, set(), dep_graph.deps)
+def main() -> None:
+    dep_graph = getDeps(sys.argv[1])
+    for root in dep_graph.roots:
+        pinBuiltThings(root, set(), dep_graph.deps)
+
+
+if __name__ == '__main__':
+    main()