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Handle missing clang.py package version on Debian #154

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Handle missing clang.py package version on Debian #154

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15 changes: 14 additions & 1 deletion ctypeslib/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@

import ctypes
import os
import platform
import re
import sys
import warnings
Expand Down Expand Up @@ -106,7 +107,19 @@ def __configure_clang_cindex():
from clang import cindex
from ctypeslib.codegen.codegenerator import translate, translate_files

__clang_py_version__ = importlib.metadata.version('clang')
try:
__clang_py_version__ = importlib.metadata.version("clang")
except PackageNotFoundError:
# Python packages are not required to provide a version that
# is queryable via the importlib metadata.
if sys.platform == "linux" and platform.freedesktop_os_release()["ID"] == "debian":
# The path for the library filename in Debian can provide a hint as
# to the major version of the clang library without loading it.
# @see https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/-/blob/19/debian/patches/python-clangpath.diff
__clang_py_version__ = cindex.conf.get_filename().split("-")[1].split(".")[0]
else:
raise ImportError("Could not determine clang.py version")

__clang_library_filename = __configure_clang_cindex()
if __clang_library_filename is None:
warnings.warn("Could not find the clang library. please install llvm libclang", RuntimeWarning)
Expand Down