Use tag version

Makefile

@@ -59,16 +59,15 @@ jenkins-quality: reports
 update:
 	pip install -r ci/test-requirements.txt
 
-tag:
-	@git tag v$(shell python3 setup.py -V)
+tagged: 
+	git describe --tags --exact-match
+	test $$(git ls-files -m | wc -l) = 0
 
-pypi:   tag
-	@if python3 setup.py -V 2>/dev/null | grep -qs + >/dev/null 2>&1 ; \
-		then echo "You need a clean, tagged tree" >&2; exit 1 ; fi
+pypi:   tagged
 	python3 setup.py sdist upload
-	## version depends on tag, so re-tagging doesn't make sense
-
 
 upload: pypi
-	git push-all --tags
+	git push --tags
+
+.PHONY: all tagged pypi upload test check doc
 

debian/control

@@ -6,6 +6,7 @@ Build-Depends: python3-setuptools, python3-all, debhelper (>= 9),
   python3 (>> 3.6),
   python3-anyio,
   python3-pytest-trio,
+  python3-setuptools-scm,
   python3-requests (>> 2.21),
   python3-pyrabbit,
 Standards-Version: 3.9.1

setup.py

@@ -1,12 +1,10 @@
 import setuptools
 
-exec(open("asyncamqp/_version.py", encoding="utf-8").read())
-
 description = 'AMQP implementation using anyio'
 
 setuptools.setup(
-    name=__packagename__,  # noqa: F821
-    version=__version__,  # noqa: F821
+    name="asyncamqp",
+    use_scm_version={"version_scheme": "guess-next-dev", "local_scheme": "dirty-tag"},
     author="Matthias Urlichs",
     author_email='[email protected]',
     url='https://github.com/python-trio/asyncamqp',