When the scan root is a sub-directory of a monorepo package hierarchy
(e.g., root = Company/Apps/Jobs/Team/), absolute imports using the full
dotted namespace (from Company.Apps.Jobs.Team.lib import delivery) were
unresolved because the scan root probed root/Company/Apps/Jobs/Team/lib
which doesn't exist inside root.
_infer_scan_root_namespace walks above the scan root collecting ancestor
directory names that contain __init__.py, establishing the root's
namespace prefix. When an absolute import's module name starts with that
prefix, the prefix is stripped and the remainder is re-probed relative
to root.
The existing root/rel fast path, ancestor walk (#2072), ambiguous import
guard (#3729), and phantom-edge retraction (#3784) are all untouched.
Third-party imports cannot false-match because the prefix check requires
a strict dotted prefix plus a remaining local component.
Co-Authored-By: Google Antigravity <noreply@google.com>
(cherry picked from commit 640e39efc4)
nikhil2004