Add patch for protobuf

Author: msimacek

graalpython/lib-graalpython/patches/metadata.toml

@@ -433,10 +433,19 @@ patch = 'prompt_toolkit.patch'
 license = 'BSD-3-Clause'
 
 [[protobuf.rules]]
+patch = 'protobuf.patch'
+license = 'BSD-3-Clause'
+# There are 'none-any' wheels on pypi, this is only needed on sdists
+dist-type = 'sdist'
+install-priority = 0
+
+[[protobuf.rules]]
+# msimacek: This version doesn't exist, but the patch file is referenced from the tensorflow patch which I'm afraid to touch
 version = '== 3.21.9'
-# Also referenced outside of pip from tensorflow patches
 patch = 'protobuf-3.21.9.patch'
 license = 'BSD-3-Clause'
+dist-type = 'sdist'
+install-priority = 0
 
 [[psycopg2.rules]]
 version = '<= 2.9.9'

graalpython/lib-graalpython/patches/protobuf.patch

@@ -0,0 +1,15 @@
+diff --git a/google/protobuf/internal/api_implementation.py b/google/protobuf/internal/api_implementation.py
+index b40446b..48e684f 100644
+--- a/google/protobuf/internal/api_implementation.py
++++ b/google/protobuf/internal/api_implementation.py
+@@ -70,8 +70,8 @@ if _implementation_type not in ('python', 'cpp', 'upb'):
+                    'supported. Please set to \'python\', \'cpp\' or '
+                    '\'upb\'.'.format(_implementation_type))
+ 
+-if 'PyPy' in sys.version and _implementation_type == 'cpp':
+-  warnings.warn('PyPy does not work yet with cpp protocol buffers. '
++if sys.implementation.name in ('pypy', 'graalpy') and _implementation_type == 'cpp':
++  warnings.warn('PyPy and GraalPy do not work yet with cpp protocol buffers. '
+                 'Falling back to the python implementation.')
+   _implementation_type = 'python'
+