From 04839bbce0ff9ff4e2586257edb2865fa7614db6 Mon Sep 17 00:00:00 2001
From: Maja Massarini <mmassari@redhat.com>
Date: Tue, 12 Nov 2024 11:06:39 +0100
Subject: [PATCH] Allow building specfile in CentOS Stream without EPEL
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When building CentOS Stream in CBS Koji,
EPEL packages are not available.
There is no package typing-extensions.

Co-authored-by: Nikola Forró <nforro@redhat.com>
---
 setup.cfg         |  2 +-
 specfile/types.py | 16 +++++++++-------
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/setup.cfg b/setup.cfg
index 3e07aaf..8b13093 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -39,7 +39,7 @@ install_requires =
     importlib-metadata;python_version<"3.8"
     dataclasses;python_version<"3.7"
     rpm
-    typing-extensions
+    typing-extensions;python_version<"3.8"
 python_requires = >=3.6
 include_package_data = True
 
diff --git a/specfile/types.py b/specfile/types.py
index b2fada2..c265891 100644
--- a/specfile/types.py
+++ b/specfile/types.py
@@ -3,10 +3,12 @@
 
 import abc
 
-from typing_extensions import Protocol
-
-
-# define our own SupportsIndex type for older version of typing_extensions (EL 8)
-class SupportsIndex(Protocol, metaclass=abc.ABCMeta):
-    @abc.abstractmethod
-    def __index__(self) -> int: ...
+try:
+    from typing import SupportsIndex
+except ImportError:
+    # define our own SupportsIndex type for older version of typing (Python 3.7 and older)
+    from typing_extensions import Protocol
+
+    class SupportsIndex(Protocol, metaclass=abc.ABCMeta):  # type: ignore [no-redef]
+        @abc.abstractmethod
+        def __index__(self) -> int: ...