Tox running command based on env variable
<p>My current workflow is github PRs and Builds tested on Travis CI, with tox testing pytest and reporting coverage to codeclimate. </p>

<p><strong>travis.yml</strong></p>

<pre><code>os:
- linux
sudo: false
language: python
python:
- "3.3"
- "3.4"
- "3.5"
- "pypy3"
- "pypy3.3-5.2-alpha1"
- "nightly"
install: pip install tox-travis
script: tox
</code></pre>

<p><strong>tox.ini</strong></p>

<pre><code>[tox]
envlist = py33, py34, py35, pypy3, docs, flake8, nightly, pypy3.3-5.2-alpha1

[tox:travis]
3.5 = py35, docs, flake8

[testenv]
deps = -rrequirements.txt
platform =
    win: windows
    linux: linux
commands =
    py.test --cov=pyCardDeck --durations=10 tests

[testenv:py35]
commands =
    py.test --cov=pyCardDeck --durations=10 tests
    codeclimate-test-reporter --file .coverage
passenv =
    CODECLIMATE_REPO_TOKEN
    TRAVIS_BRANCH
    TRAVIS_JOB_ID
    TRAVIS_PULL_REQUEST
    CI_NAME
</code></pre>

<p>However, Travis isn't passing my environmental variables for pull requests, which makes my coverage reporting fail. Travis documentation shows this as solution: </p>

<pre><code>script:
   - 'if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then bash ./travis/run_on_pull_requests; fi'
   - 'if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then bash ./travis/run_on_non_pull_requests; fi'
</code></pre>

<p>However, in tox this doesn't work as tox is using subprocess python module and doesn't recognize if as a command (naturally). </p>

<p>How do I run codeclimate-test-reporter only for builds and not for pull requests based on the TRAVIS_PULL_REQUEST variable? Do I have to create my own script and call that? Is there a smarter solution?</p>

<p>My solution is going through setup.py command which takes care of everything</p>

<p>Tox.ini</p>

<pre><code>[testenv:py35]
commands =
    python setup.py testcov
passenv = ...
</code></pre>

<p>setup.py</p>

<pre><code>class PyTestCov(Command):
    description = "run tests and report them to codeclimate"
    user_options = []

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def run(self):
        errno = call(["py.test --cov=pyCardDeck --durations=10 tests"], shell=True)
        if os.getenv("TRAVIS_PULL_REQUEST") == "false":
            call(["python -m codeclimate_test_reporter --file .coverage"], shell=True)
        raise SystemExit(errno)

 ...


  cmdclass={'testcov': PyTestCov},
</code></pre>

python travis-ci tox code-climate