From 4860387cf3c3cd9eba9c386da4f6383798c208c5 Mon Sep 17 00:00:00 2001
From: Ben Kurtovic <ben@benkurtovic.com>
Date: Mon, 30 Jun 2025 22:51:40 -0400
Subject: [PATCH] Disable C tokenizer building on PyPy (fixes #341)

---
 CHANGELOG          | 2 +-
 docs/changelog.rst | 3 ++-
 setup.py           | 5 ++++-
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index 84bba88..c9204ab 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,6 @@
 v0.7.2 (unreleased):
 
-- ...
+- Fix building on non-CPython implementations like PyPy. (#341)
 
 v0.7.1 (released June 30, 2025):
 
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 89d27fb..4fe3949 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -7,7 +7,8 @@ v0.7.2
 Unreleased
 (`changes <https://github.com/earwig/mwparserfromhell/compare/v0.7.1...main>`__):
 
-- ...
+- Fix building on non-CPython implementations like PyPy.
+  (`#341 <https://github.com/earwig/mwparserfromhell/issues/341>`_)
 
 v0.7.1
 ------
diff --git a/setup.py b/setup.py
index 5cfc667..cd14eda 100644
--- a/setup.py
+++ b/setup.py
@@ -24,6 +24,7 @@ from __future__ import annotations
 
 import glob
 import os
+import platform
 import sys
 from enum import Enum
 
@@ -63,8 +64,10 @@ elif "WITHOUT_EXTENSION" in os.environ:
             f"Unknown value for $WITHOUT_EXTENSION; should be '1', or '0', "
             f"but found {value!r}"
         )
-else:
+elif platform.python_implementation() == "CPython":
     use_extension = UseExtension.REQUIRED
+else:
+    use_extension = UseExtension.IGNORED
 
 if use_extension == UseExtension.IGNORED:
     ext_modules = []