Overhaul the tox config

per lessons learned in wuttjamaican

also remove old reference to init.d scripts in manifest

MANIFEST.in

@@ -9,8 +9,6 @@ recursive-include rattail/data *
 recursive-include rattail/data/config *.conf
 recursive-include rattail/data/sample *.csv
 
-include rattail/contrib/init.d/*
-
 include rattail/db/alembic/README
 recursive-include rattail/db/alembic *.mako
 recursive-include rattail/db/alembic *.py

tox.ini

@@ -2,25 +2,29 @@
 [tox]
 envlist = py36, py37, py39
 
+# TODO: can remove this when we drop py36 support
+# nb. need this for testing older python versions
+# https://tox.wiki/en/latest/faq.html#testing-end-of-life-python-versions
+requires = virtualenv<20.22.0
+
 [testenv]
-commands =
-        pip install --upgrade pip
-        pip install --upgrade setuptools wheel
-        pip install --upgrade --upgrade-strategy eager rattail[auth,bouncer,db,tests]
-        pytest {posargs}
+extras = bouncer,db,tests
+commands = pytest {posargs}
+
+[testenv:py37]
+# nb. newer libs may cause segfault for this one, so must avoid that
+deps =
+        coverage<6.5
+        wheel<0.41
 
 [testenv:coverage]
 basepython = python3
-deps = invoke
-commands =
-        pip install --upgrade pip
-        pip install --upgrade --upgrade-strategy eager rattail[auth,bouncer,db,tests] appy luigi xlrd
-        pytest --cov=rattail --cov-report=html
+deps = appy invoke luigi xlrd
+extras = bouncer,db,tests
+commands = pytest --cov=rattail --cov-report=html
 
 [testenv:docs]
 basepython = python3
 changedir = docs
-commands =
-        pip install --upgrade pip
-        pip install --upgrade --upgrade-strategy eager rattail[auth,bouncer,db,tests,docs]
-        sphinx-build -b html -d {envtmpdir}/doctrees -W -T . {envtmpdir}/docs
+extras = bouncer,db,tests,docs
+commands = sphinx-build -b html -d {envtmpdir}/doctrees -W -T . {envtmpdir}/docs