Move the Travis flake8 logic into test/lint.sh.

Remove Python 3.

.travis.yml

@@ -2,23 +2,11 @@ language: python
cache: pip
python:
    - 2.7
    - 3.6
    #- nightly
    #- pypy
    #- pypy3
matrix:
    allow_failures:
        - python: 3.6
install:
    #- pip install -r requirements.txt
    - pip install flake8  # pytest  # add another testing frameworks later
before_script:
    # stop the build if there are Python syntax errors or undefined names
    - flake8 . --count --exclude=./Python-2.7.13 --select=E901,E999,F821,F822,F823 --show-source --statistics
    # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
    - flake8 . --count --exclude=./Python-2.7.13 --exit-zero --max-complexity=10 --max-line-length=127 --statistics
script:
    - test/lint.sh
    - test/lint.sh travis
notifications:
    on_success: change
    on_failure: change  # `always` will be the setting once code changes slow down

test/lint.sh

@@ -87,4 +87,30 @@ find-tabs() {
    xargs grep -n $'\t'
}

bin-flake8() {
  local ubuntu_flake8=~/.local/bin/flake8 
  if test -f "$ubuntu_flake8"; then
    $ubuntu_flake8 "$@"
  else
    # Assume it's in $PATH, like on Travis.
    flake8 "$@"
  fi
}

flake8-all() {
  local -a dirs=(asdl bin core osh)
  # stop the build if there are Python syntax errors or undefined names
  bin-flake8 "${dirs[@]}" \
    --count --select=E901,E999,F821,F822,F823 --show-source --statistics

  # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
  bin-flake8 "${dirs[@]}" \
    --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
}

# Hook for travis
travis() {
  flake8-all
}

"$@"