resolve static analysis and 'usedevelop' tests

Author: jquast

requirements-develop.txt

@@ -2,7 +2,7 @@
 requests==2.7.0
 blessed==1.9.5
 docopt==0.6.2
-prospector==0.10.2[with_frosted,with_pyroma]
+prospector[with_frosted,with_pyroma]==0.10.2
 restructuredtext-lint==0.12.2
 
 # transient dependencies

tox.ini

@@ -10,7 +10,6 @@ envlist = sa,
 [testenv]
 # for any python, run simple pytest (only)
 deps = pytest
-
 setenv = PYTHONIOENCODING=utf-8
 
 commands = {envbindir}/py.test \
@@ -19,6 +18,11 @@ commands = {envbindir}/py.test \
 
 [testenv:sa]
 deps = --requirement=requirements-develop.txt
+# anytime we use requirements-develop.txt, we must also
+# demand that we use 'python setup.py develop', to satisfy
+# an otherwise circular dependency on downstream 'blessed'
+# library.
+usedevelop = true
 
 # - prospector is configured using .prospector.yaml, and wraps several
 #   static analysis/linting and style-checker tools.
@@ -49,6 +53,7 @@ commands = {envbindir}/py.test \
 deps = pytest
        pytest-cov
        --requirement=requirements-develop.txt
+usedevelop = true
 
 commands = {envbindir}/py.test -v \
                 -x --strict \