general: get rid of example_config & use demo/stub my.config instead

tox.ini

@@ -10,9 +10,6 @@ setenv = MY_CONFIG = nonexistent
 commands =
     pip install -e .[testing]
     # python -m pytest {posargs}
-    # todo these are probably not necessary anymore?
-    python3 -c 'from my.config import stub as config; print(config.key)'
-    python3 -c 'import my.config; import my.config.repos' # shouldn't fail at least
 
     # my.location.google deps
     pip install geopy ijson
@@ -27,7 +24,6 @@ commands =
         tests/core.py                              \
         tests/misc.py                              \
         tests/get_files.py                         \
-        tests/config.py::test_set_repo             \
         tests/config.py::test_environment_variable \
         tests/demo.py                              \
         tests/bluemaestro.py                       \
@@ -46,10 +42,8 @@ commands = ./demo.py
 
 # specific modules that are known to be mypy compliant (to avoid false negatives)
 [testenv:mypy-modules]
-# todo add a stub with all the various configs for mypy/doc
-setenv = MYPYPATH=doc/example_config
+whitelist_externals = bash
 commands =
-    # TODO ugh. somehow, user installed (editable??) packages leak into this environment??
     pip install -e .[testing] .[optional]
     pip install git+https://github.com/karlicoss/ghexport
     pip install git+https://github.com/karlicoss/hypexport
@@ -60,7 +54,12 @@ commands =
 
     pip install git+https://github.com/karlicoss/porg
 
-    # todo I guess use a script...
+    # ugh fuck. soo... need to reset HOME, otherwise user's site-packages are somehow leaking into mypy's path...
+    # see https://github.com/python/mypy/blob/f6fb60ef69738cbfe2dfe56c747eca8f03735d8e/mypy/modulefinder.py#L487
+    # this is particularly annoying when user's config is leaking and mypy isn't running against the repository config
+    # maybe this issue...  https://github.com/tox-dev/tox/issues/838
+    # and also since it's Tox, we can't just set an env variable for a single command, have to spawn a subshell. jeez.
+    bash -c 'HOME= \
     python3 -m mypy -p my.github.ghexport             \
                     -p my.hypothesis                  \
                     -p my.instapaper                  \
@@ -75,7 +74,7 @@ commands =
                     -p my.calendar.holidays           \
                     --txt-report  .mypy-coverage      \
                     --html-report .mypy-coverage      \
-                    {posargs}
+                    {posargs}'
     # txt report is a bit more convenient to view on CI