Update to use setuptools_scm

pyproject.toml

@@ -1,3 +1,3 @@
 [build-system]
-requires = ["setuptools", "wheel"]
-build-backend = "setuptools.build_meta:__legacy__"
+requires = ["setuptools>=45", "wheel", "setuptools_scm[toml]>=6.0"]
+build-backend = "setuptools.build_meta"

setup.cfg

@@ -1,6 +1,8 @@
 [metadata]
 name = flake8-no-implicit-concat
-# version = attr: flake8_no_implicit_concat._version.__version__
+version = attr: flake8_no_implicit_concat._version.__version__
+use_scm_version =
+  write_to = flake8_no_implicit_concat/_version.py
 description = Flake8 plugin that forbids implicit str/bytes literal concatenations
 long_description = file: README.md
 long_description_content_type = text/markdown
@@ -40,6 +42,9 @@ packages = find:
 install_requires =
   flake8
   more-itertools; python_version<"3.10"
+setup_requires =
+  wheel
+  setuptools_scm>=6.0
 
 [options.entry_points]
 flake8.extension =

setup.py

@@ -5,13 +5,4 @@
 from setuptools import setup
 
 
-def _get_version() -> str:
-    with open("flake8_no_implicit_concat/_version.py") as f:
-        for line in f:
-            if line.startswith("__version__"):
-                delim = '"' if '"' in line else "'"
-                return line.split(delim)[1]
-    raise RuntimeError("Unable to find version string.")
-
-
-setup(version=_get_version())
+setup()