Merge #136

136: Remove setup.py. r=duckinator a=duckinator

Replaces and closes #58.

Original description for #58:

> Followup on #55.
> 
> - [x] Get rid of `setup.py`, which was made optional by pypa/setuptools#1675.
> - [x] Set a version requirement for `setuptools`.

Co-authored-by: Nicolas Braud-Santoni <[email protected]>
Co-authored-by: Ellen Marie Dash <[email protected]>

Author: 3 people

.cirrus.yml

@@ -67,6 +67,7 @@ FreeBSD_task:
     - PY=`echo $PYTHON | tr -d '.'`
     - pkg install -y python${PY} py${PY}-setuptools
     - python${PYTHON} -m ensurepip
+    - python${PYTHON} -m pip install -U 'pip>=19' # Hard requirement for no setup.py.
     - python${PYTHON} -m pip install .[build]
     - python${PYTHON} -m pip install .[release] .[testing]
   script:

pyproject.toml

@@ -1,6 +1,8 @@
 [build-system]
 # Specify the required build system.
-requires = ["setuptools", "wheel"]
+# Setuptools 40.9.0+ requirement is necessary to get rid of setup.py; see
+#  https://github.com/pypa/setuptools/pull/1675
+requires = ["setuptools >= 40.9.0", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [tool.bork.zipapp]