image: "python:3.7"

variables:
  # force pip cache dir
  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"

cache:
  paths:
    - .cache/pip # pip caching directory

# setup environemnt
before_script:
  - python --version
  - pip install -r requirements.txt
  - pip install flake8 black

stages:
  - syntax
  - black
  - pep8

syntax:
  stage: syntax
  script:
    # breaking errors ie syntax errors
    - flake8 --select=E9,F63,F7,F82 --show-source

black:
  stage: black
  script:
    # code consistency
    - black . --check --line-length 120

pep8:
  stage: pep8
  script:
    # pep8 warnings and other non breaking warnings
    - flake8 --max-complexity=10 --max-line-length=120 --show-source
  allow_failure: true