cli: add 'hpi module install' and 'hpi module requires'

ci: use hpi module install; remove explicit module links

relevant:

- https://github.com/karlicoss/HPI/issues/12
- https://github.com/karlicoss/HPI/issues/79

tox.ini

@@ -4,28 +4,34 @@ minversion = 3.5
 [testenv]
 passenv = CI CI_*
 
-# TODO ugh. unclear how to reuse setup.cfg deps in tox
-[testenv:tests]
+
+# just the very core tests with minimal dependencies
+[testenv:tests-core]
+commands =
+    pip install -e .[testing]
+    python3 -m pytest \
+                      tests/core.py      \
+                      tests/get_files.py \
+                      {posargs}
+
+
+# todo maybe also have core tests and misc tests? since ideally want them without dependencies
+[testenv:tests-all]
 # deliberately set to nonexistent path to check the fallback logic
+# TODO not sure if need it?
 setenv = MY_CONFIG = nonexistent
 commands =
-    # TODO core & modules should be tested separately?
-
     pip install -e .[testing]
-    # python -m pytest {posargs}
 
-    # TODO install via helper script..
-    # my.location.google deps
-    pip install geopy ijson
+    hpi module install my.location.google
+    pip install ijson # optional dependency
 
-    # my.time.tz.via_location dep
-    pip install timezonefinder
+    hpi module install my.time.tz.via_location
 
-    # my.calendar.holidays dep
-    pip install workalendar
+    hpi module install my.calendar.holidays
 
     # my.body.weight dep
-    pip install orgparse
+    hpi module install my.orgmode
 
     python3 -m pytest tests \
             # ignore some tests which might take a while to run on ci..
@@ -45,7 +51,7 @@ commands =
 whitelist_externals = cat
 commands =
     pip install -e .[testing,optional]
-    pip install orgparse # used it core.orgparse?
+    pip install orgparse # used it core.orgmode?
     # todo add tests?
     python3 -m mypy -p my.core \
                     --txt-report  .coverage.mypy-core \
@@ -56,18 +62,18 @@ commands =
 
 # specific modules that are known to be mypy compliant (to avoid false negatives)
 # todo maybe split into separate jobs? need to add comment how to run
-# and install dependencies via AST thing?
 [testenv:mypy-misc]
 commands =
     pip install -e .[testing,optional]
-    pip install orgparse
-    pip install git+https://github.com/karlicoss/endoexport
-    pip install git+https://github.com/karlicoss/ghexport
-    pip install git+https://github.com/karlicoss/hypexport
-    pip install git+https://github.com/karlicoss/instapexport
-    pip install git+https://github.com/karlicoss/pockexport
-    pip install git+https://github.com/karlicoss/rexport
-    pip install git+https://github.com/karlicoss/stexport
+
+    hpi module install my.orgmode
+    hpi module install my.endomondo
+    hpi module install my.github.ghexport
+    hpi module install my.hypothesis
+    hpi module install my.instapaper
+    hpi module install my.pocket
+    hpi module install my.reddit
+    hpi module install my.stackexchange.stexport
 
     # TODO fuck. -p my.github isn't checking the subpackages?? wtf...
     python3 -m mypy \