Use a dedicated env to publish coverage.

tox.ini

@@ -1,5 +1,8 @@
 ; tox configuration file for running tests similar to buildbot builders.
-
+;
+; There is a non-default *-coverage-publish-* environment used to publish the
+; coverage results to codecov.io
+;
 [tox]
 skip_missing_interpreters=True
 toxworkdir=build/
@@ -45,7 +48,6 @@ passenv = *
 
 setenv =
    COVERAGE_PROCESS_START = {toxinidir}/.coveragerc
-   CODECOV_TOKEN = fb52015a-b78e-4d89-a6e0-a4829aea2efa
 
 commands =
     {tests,nomodules}: {envbindir}/trial --reactor={env:TWISTED_REACTOR:default} --reporter={env:TRIAL_REPORTER:verbose}  {posargs:twisted}
@@ -55,9 +57,10 @@ commands =
     coverage: coverage run -p --rcfile={toxinidir}/.coveragerc {envbindir}/trial --reactor={env:TWISTED_REACTOR:default} --reporter={env:TRIAL_REPORTER:verbose} {posargs:twisted}
     coverage: python {toxinidir}/admin/_copy.py "_trial_temp/.coverage*" {toxinidir}
     coverage: python {toxinidir}/admin/_copy.py ".coverage*" {toxinidir}
-    coverage: coverage combine
-    coverage: coverage xml -o coverage.xml -i
-    coverage: codecov
+
+    coverage-publish: coverage combine
+    coverage-publish: coverage xml -o coverage.xml -i
+    coverage-publish: codecov -t fb52015a-b78e-4d89-a6e0-a4829aea2efa
 
     twistedchecker: twistedchecker {posargs:twisted}
     pyflakes: pyflakes {posargs:twisted admin bin}
@@ -82,7 +85,7 @@ changedir={toxinidir}
 [tox:travis]
 ; This section is used by tox-travis
 ; https://pypi.python.org/pypi/tox-travis
-2.7 = py27-coverage-posix,py27-nomodules-posix,topfile,narrativedocs,pyflakes
-3.3 = py33-coverage-posix
-3.4 = py34-coverage-posix
-3.5 = py35-coverage-posix
+2.7 = py27-coverage-publish-posix,py27-nomodules-posix,topfile,narrativedocs,pyflakes
+3.3 = py33-coverage-publish-posix
+3.4 = py34-coverage-publish-posix
+3.5 = py35-coverage-publish-posix