Trac #32672: src/setup.py: Don't cythonize everything in src/

In the version of setup.py used by the editable install:
{{{
 extensions = cythonize(
        ["**/*.pyx"],
}}}
at least it should restrict itself to `sage/**/*.pyx`
so that it does not go cythonizing in random directories that the user
may have in this directory... such as a venv...

URL: https://trac.sagemath.org/32672
Reported by: mkoeppe
Ticket author(s): Matthias Koeppe
Reviewer(s): Jonathan Kliem

src/setup.py

@@ -106,7 +106,7 @@
         from Cython.Build import cythonize
         from sage.env import cython_aliases, sage_include_directories
         extensions = cythonize(
-            ["**/*.pyx"],
+            ["sage/**/*.pyx"],
             exclude=files_to_exclude,
             include_path=sage_include_directories(use_sources=True) + ['.'],
             compile_time_env=compile_time_env_variables(),