Switch to Pipenv for dependency management

naucse is an application, so it makes sense to use pipenv
for nicer management of reproducible environments.

Fixes: #276

Author: encukou

.travis.yml

@@ -6,15 +6,16 @@ cache:
   - $HOME/.cache/pip
   - .arca/cache
 install:
-- pip install -r test_requirements.txt
-- pip install 'arca[docker]>=0.2'
+- python -m pip install pipenv --upgrade
+- pipenv install --deploy --dev
 before_script:  # encrypted variables aren't accessible in PRs
 - 'if [ -n "$DOCKER_HUB_PASSWORD" ]; then docker login -u "$DOCKER_HUB_USERNAME" -p "$DOCKER_HUB_PASSWORD"; fi'
 - 'if [ -z "$DOCKER_HUB_PASSWORD" ]; then export ARCA_BACKEND_REGISTRY_PULL_ONLY=true; fi'
 script:
-- python -m pytest test_naucse
-- python -m naucse list_courses  # don't remove, there might be timeouts otherwise, see naucse/cli.py for details
-- python -m naucse freeze --verbose
+- pipenv graph
+- pipenv run test
+- pipenv run naucse list_courses  # don't remove, there might be timeouts otherwise, see naucse/cli.py for details
+- pipenv run naucse freeze --verbose
 after_script:
 - echo "Suplementary logs:"
 - cat .arca/naucse.log
@@ -23,7 +24,7 @@ after_script:
 deploy:
   provider: script
   skip_cleanup: true
-  script: python -m naucse deploy --push --no-freeze
+  script: pipenv run naucse deploy --push --no-freeze
   on:
     branch: master
     repo: pyvec/naucse.python.cz

Pipfile

@@ -0,0 +1,39 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[scripts]
+naucse = "env PYTHONPATH=. python -m naucse"
+serve = "env PYTHONPATH=. python -m naucse serve"
+test = "python -m pytest test_naucse/"
+
+[packages]
+"ansi2html" = "*"
+elsa = ">=0.1.5"
+ics = "*"
+ipython = "*"
+mistune = "*"
+nbconvert = "*"
+python-dateutil = "*"
+traitlets = "*"
+arca = {extras = ["docker"], version = ">= 0.3"}
+cssutils = "*"
+click = "*"
+giturlparse = "*"
+PyYAML = "*"
+Flask = "*"
+Frozen-Flask = "*"
+"Jinja2" = "*"
+jupyter_client = "*"
+Pygments = "*"
+Werkzeug = "*"
+GitPython = "*"
+
+[dev-packages]
+pytest = "*"
+pytest-env = "*"
+pytest-mock = "*"
+
+[requires]
+python_version = "3.6"