From 0bcd1eeefaa58d49441ad1d82d0852c049154811 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Mon, 12 May 2025 00:28:42 +0200
Subject: [PATCH 1/4] Fix deprecation warning when creating AST node without
 required fields

Python 3.13 added the warning which will become an error in Python 3.15
(see https://github.com/python/cpython/pull/105880)
---
 genshi/template/astutil.py | 16 +++++++++++++++-
 genshi/template/eval.py    | 11 +++++------
 pytest.ini                 |  3 +++
 3 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/genshi/template/astutil.py b/genshi/template/astutil.py
index c841aeb..b53b573 100644
--- a/genshi/template/astutil.py
+++ b/genshi/template/astutil.py
@@ -802,7 +802,7 @@ def visit(self, node):
         return visitor(node)
 
     def _clone(self, node):
-        clone = node.__class__()
+        clone = construct_ast_class(node.__class__)
         for name in getattr(clone, '_attributes', ()):
             try:
                 setattr(clone, name, getattr(node, name))
@@ -887,3 +887,17 @@ def _clone(self, node):
     visit_Index = _clone
 
     del _clone
+
+
+def construct_ast_class(cls):
+    kwargs = {}
+    for name, typ in cls.__annotations__.items():
+        if typ is str:
+            kwargs[name] = 'foo'
+        elif typ is int:
+            kwargs[name] = 42
+        elif typ is object:
+            kwargs[name] = b'foo'
+        elif isinstance(typ, type) and issubclass(typ, _ast.AST):
+            kwargs[name] = construct_ast_class(typ)
+    return cls(**kwargs)
diff --git a/genshi/template/eval.py b/genshi/template/eval.py
index 82bddf3..4197597 100644
--- a/genshi/template/eval.py
+++ b/genshi/template/eval.py
@@ -18,7 +18,8 @@
 
 from genshi.compat import builtins, exec_, string_types, text_type
 from genshi.core import Markup
-from genshi.template.astutil import ASTTransformer, ASTCodeGenerator, parse
+from genshi.template.astutil import (
+    ASTTransformer, ASTCodeGenerator, parse, construct_ast_class)
 from genshi.template.base import TemplateRuntimeError
 from genshi.util import flatten
 
@@ -59,11 +60,9 @@ def __init__(self, source, filename=None, lineno=-1, lookup='strict',
                 'Expected string or AST node, but got %r' % source
             self.source = '?'
             if self.mode == 'eval':
-                node = _ast.Expression()
-                node.body = source
+                node = _ast.Expression(body=source)
             else:
-                node = _ast.Module()
-                node.body = [source]
+                node = _ast.Module(body=[source])
 
         self.ast = node
         self.code = _compile(node, self.source, mode=self.mode,
@@ -454,7 +453,7 @@ def _compile(node, source=None, mode='eval', filename=None, lineno=-1,
 
 
 def _new(class_, *args, **kwargs):
-    ret = class_()
+    ret = construct_ast_class(class_)
     for attr, value in zip(ret._fields, args):
         if attr in kwargs:
             raise ValueError('Field set both in args and kwargs')

From 09fd95760e231d4f487c7378b11215e5c5d184c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Mon, 12 May 2025 00:49:35 +0200
Subject: [PATCH 3/4] Use ast Node annotations to construct if available

---
 genshi/template/astutil.py | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/genshi/template/astutil.py b/genshi/template/astutil.py
index b53b573..510d3a8 100644
--- a/genshi/template/astutil.py
+++ b/genshi/template/astutil.py
@@ -891,13 +891,14 @@ def _clone(self, node):
 
 def construct_ast_class(cls):
     kwargs = {}
-    for name, typ in cls.__annotations__.items():
-        if typ is str:
-            kwargs[name] = 'foo'
-        elif typ is int:
-            kwargs[name] = 42
-        elif typ is object:
-            kwargs[name] = b'foo'
-        elif isinstance(typ, type) and issubclass(typ, _ast.AST):
-            kwargs[name] = construct_ast_class(typ)
+    if hasattr(cls, '__annotations__'):
+        for name, typ in cls.__annotations__.items():
+            if typ is str:
+                kwargs[name] = 'foo'
+            elif typ is int:
+                kwargs[name] = 42
+            elif typ is object:
+                kwargs[name] = b'foo'
+            elif isinstance(typ, type) and issubclass(typ, _ast.AST):
+                kwargs[name] = construct_ast_class(typ)
     return cls(**kwargs)