version: 2
jobs:
   build:
     docker:
       - image: circleci/python:2.7
     steps:
       - checkout
       - run:
          name: Install System Dependencies
          command: |
              sudo apt-get update -qq
              sudo pip install pycodestyle==2.3.1 flake8
              sudo pip check
       - run:
          name: lint
          command: |
            # we want pyflakes to check all files for unused imports only
            # we use flake8 because it allows us to ignore other warnings
            # exclude the thrift directories - they contain auto-generated code
            flake8 --ignore=E501,F811,F812,F822,F823,F831,F841,N8,C9 --exclude=thrift_bindings,cassandra-thrift .
            git remote add apache git://github.com/apache/cassandra-dtest.git
            git fetch apache # fetch master for the next diff
            # feed changed lines with no context around them to pycodestyle
            # I know we don't enforce line length but if you introduce
            # 200-char lines you are doing something terribly wrong.
            # lint all files for everything but line length errors
            git diff apache/master...HEAD -U0 | pycodestyle --ignore=E501 --diff
            # lint all files except json_test.py for line length errors
            git diff apache/master...HEAD -U0 | pycodestyle --diff --exclude='json_test.py' --exclude='meta_tests/assertion_test.py' --max-line-length=200