ci: use version number from Git tag

Makefile

@@ -27,8 +27,6 @@ clean:
 	rm -rf .cache build .coverage .eggs cloudbender.egg-info .pytest_cache dist
 
 pybuild:
-	# Set version in Python
-	sed -i cloudbender/__init__.py -e 's/__version__.*/__version__ = "$(TAG)"/'
 	python setup.py bdist_wheel --universal
 
 test_upload: $(PACKAGE_FILE)

cloudbender/__init__.py

@@ -1,8 +1,13 @@
 import logging
+import pkg_resources
 
 __author__ = "Stefan Reimer"
 __email__ = "stefan@zero-downtimet.net"
-__version__ = "v0.10.3"
+
+try:
+    __version__ = pkg_resources.get_distribution("CloudBender").version
+except pkg_resources.DistributionNotFound:
+    __version__ = "devel"
 
 
 # Set up logging to ``/dev/null`` like a library is supposed to.

setup.cfg

@@ -1,5 +1,5 @@
 [metadata]
-description-file = README.md
+description_file = README.md
 
 [bdist_wheel]
 universal=1

setup.py

@@ -6,17 +6,6 @@ from setuptools import setup
 from setuptools import find_packages
 from setuptools.command.test import test as TestCommand
 
-def find_version(filename):
-    """Uses re to pull out the assigned value to __version__ in filename."""
-
-    with io.open(filename, "r", encoding="utf-8") as version_file:
-        version_match = re.search(r'^__version__ = [\'"]([^\'"]*)[\'"]',
-                                  version_file.read(), re.M)
-    if version_match:
-        return version_match.group(1)
-    return "0.0-version-unknown"
-
-
 class PyTest(TestCommand):
     """TestCommand subclass to use pytest with setup.py test."""
 
@@ -45,7 +34,10 @@ else:
 
 setup(
     name='cloudbender',
-    version=find_version("cloudbender/__init__.py"),
+    setuptools_git_versioning={
+        "enabled": True,
+    },
+    setup_requires=["setuptools-git-versioning"],
     description='Toolset to render and manage AWS Cloudformation',
     python_requires='>=3.7',
     long_description=long_description,