[requirements] Added pipenv tasks to Pipfile

Implemented pipenv scripts to the relevant section of the Pipfile, to
replace existing files. "runflake8" is replaced by "pipenv run lint",
and "runisort" is replaced by "pipenv run isort". Since it's difficult
to implement runtests.py as a single one-liner, I've added "pipenv run
test", which is an alias to "pipenv run python runtests.py".

.travis.yml

@@ -1,6 +1,6 @@
 language: python
 sudo: false
-#cache: pip
+cache: pip
 
 addons:
   apt:
@@ -30,10 +30,10 @@ branches:
 
 before_install:
   - pip install -U pipenv
-  - pipenv install --skip-lock https://github.com/openwisp/django-netjsonconfig/tarball/master
   - pipenv install --dev --skip-lock
-  - pipenv run ./runflake8
-  - pipenv run ./runisort
+  - pipenv run pip freeze
+  - pipenv run lint
+  - pipenv run isort
 
 install:
   - pipenv install $DJANGO
@@ -42,12 +42,12 @@ install:
   - pipenv install --skip-lock "six>=1.11.0"
   # TODO: temporary, remove when django-netjsonconfig 0.9.0 is released
   - if [[ $TRAVIS_PYTHON_VERSION == "2.7" ]]; then pipenv install git+git://github.com/tinio/pysqlite.git@extension-enabled#egg=pysqlite; fi
-  # TODO: temporary, remove when django-x509 is released with the passphrase add-on
-  - pipenv install --skip-lock https://github.com/openwisp/django-x509/tarball/master
+  - pipenv run pip install https://github.com/openwisp/django-x509/tarball/master
 
 script:
   # for some reason the migrations check is failing only on django 2.0
   - if [[ $TRAVIS_PYTHON_VERSION == 3.4 ]]; then pipenv run ./tests/manage.py makemigrations config pki --dry-run | grep "No changes detected"; fi
+  - pipenv run pip freeze
   - pipenv run coverage run --source=openwisp_controller runtests.py
 
 after_success:

Pipfile

@@ -6,9 +6,15 @@ name = "pypi"
 [packages]
 "e1839a8" = {editable = true, path = "."}
 "2e72db2" = {file = "https://github.com/openwisp/django-netjsonconfig/tarball/master"}
+"e81041b" = {file = "https://github.com/openwisp/django-x509/tarball/master"}
 
 [dev-packages]
 coverage = "*"
 coveralls = "*"
 isort = "*"
 flake8 = "*"
+
+[scripts]
+lint = "python -m flake8"
+isort = "python -m isort"
+test = "python runtests.py"

setup.cfg

@@ -7,9 +7,15 @@ known_first_party = openwisp_users, openwisp_utils
 line_length=110
 default_section = THIRDPARTY
 skip = migrations
+diff = 1
+check_only = 1
+recursive = 1
+
 
 [flake8]
 # W503: line break before or after operator
 # W504: line break after or after operator
 # W605: invalid escape sequence
+exclude = migrations,./tests/*settings*.py
 ignore = W605, W503, W504
+max-line-length = 110