Configure setuptools_scm using pyproject.toml

Author: nicoddemus

pyproject.toml

@@ -2,11 +2,14 @@
 requires = [
   # sync with setup.py until we discard non-pep-517/518
   "setuptools>=40.0",
-  "setuptools-scm",
+  "setuptools-scm>=3.4",
   "wheel",
 ]
 build-backend = "setuptools.build_meta"
 
+[tool.setuptools_scm]
+write_to = "src/_pytest/_version.py"
+
 [tool.pytest.ini_options]
 minversion = "2.0"
 addopts = "-rfEX -p pytester --strict-markers"

setup.py

@@ -1,9 +1,4 @@
 from setuptools import setup
 
-
-def main():
-    setup(use_scm_version={"write_to": "src/_pytest/_version.py"})
-
-
 if __name__ == "__main__":
-    main()
+    setup()