Support attrs decorators even if they are imported from attrs (#2059) (#2073)

Use inference to determine membership of ``attr(s)`` module

Co-authored-by: Daniël van Noord <13665637+DanielNoord@users.noreply.github.com>
(cherry picked from commit 489c90fb29970d9362f21f26247bd45a39832dcd)

Co-authored-by: alm <alonme@users.noreply.github.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/astroid/brain/brain_attrs.py b/astroid/brain/brain_attrs.py
index acb069e3..7afcc8ab 100644
--- a/astroid/brain/brain_attrs.py
+++ b/astroid/brain/brain_attrs.py
@@ -8,6 +8,7 @@ Astroid hook for the attrs library
 Without this hook pylint reports unsupported-assignment-operation
 for attrs classes
 """
+from astroid.helpers import safe_infer
 from astroid.manager import AstroidManager
 from astroid.nodes.node_classes import AnnAssign, Assign, AssignName, Call, Unknown
 from astroid.nodes.scoped_nodes import ClassDef
@@ -40,6 +41,10 @@ def is_decorated_with_attrs(node, decorator_names=ATTRS_NAMES) -> bool:
             decorator_attribute = decorator_attribute.func
         if decorator_attribute.as_string() in decorator_names:
             return True
+
+        inferred = safe_infer(decorator_attribute)
+        if inferred and inferred.root().name == "attr._next_gen":
+            return True
     return False