Use setup.py setup which allows comments

dev-requirements.txt

@@ -1,3 +1,5 @@
+# We use dev-requirements.txt instead of just declaring the requirements here
+# because Read The Docs needs a requirements file.
 PyYAML==5.2
 Pygments==2.5.2
 Sphinx-Substitution-Extensions==2019.6.15.0

setup.cfg

@@ -123,6 +123,7 @@ BLANK_LINE_BEFORE_NESTED_CLASS_OR_DEF = true
 
 [metadata]
 name = VWS Python
+version = attr: vws.__version__
 description = Interact with the Vuforia Web Services (VWS) API.
 long_description = file: README.rst
 keywords = vuforia client

setup.py

@@ -1,21 +1,35 @@
 """Setup script for VWS Python, a wrapper for Vuforia's Web Services APIs."""
 
+from pathlib import Path
 from setuptools import setup
+from typing import List
 
 import versioneer
 
-# We use requirements.txt instead of just declaring the requirements here
-# because this helps with Docker package caching.
-with open('requirements.txt') as requirements:
-    INSTALL_REQUIRES = requirements.readlines()
 
-# We use dev-requirements.txt instead of just declaring the requirements here
-# because Read The Docs needs a requirements file.
-with open('dev-requirements.txt') as dev_requirements:
-    DEV_REQUIRES = dev_requirements.readlines()
+def _get_dependencies(requirements_file: Path) -> List[str]:
+    """
+    Return requirements from a requirements file.
+
+    This expects a requirements file with no ``--find-links`` lines.
+    """
+    lines = requirements_file.read_text().strip().split('\n')
+    return [line for line in lines if not line.startswith('#')]
+
+
+_DIRECT_REQUIRES = _get_dependencies(
+    requirements_file=Path('requirements.txt'),
+)
+
+INSTALL_REQUIRES = _DIRECT_REQUIRES
+DEV_REQUIRES = _get_dependencies(
+    requirements_file=Path('dev-requirements.txt'),
+)
+PACKAGING_REQUIRES = _get_dependencies(
+    requirements_file=Path('packaging-requirements.txt'),
+)
 
 setup(
-    version=versioneer.get_version(),  # type: ignore
     cmdclass=versioneer.get_cmdclass(),  # type: ignore
     install_requires=INSTALL_REQUIRES,
     extras_require={'dev': DEV_REQUIRES},