Warn if packages still using flit.buildapi instead of flit_core.buildapi

pypa · Jan 28, 2024 · 1cf3156 · 1cf3156
1 parent 792500a
commit 1cf3156
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/flit/buildapi.py b/flit/buildapi.py
@@ -1 +1,6 @@
+from warnings import warn
+warn('A package has specified `build-backend = "flit.buildapi"` and is being '
+     'built with Flit >= 3.10. This is likely to break in a future version. '
+     'Please change the backend to flit_core.buildapi, and/or specify a '
+     'maximum version of Flit.')
 from flit_core.buildapi import *