language: c
dist: trusty
sudo: false
group: beta

# To cache doc-building dependencies.
cache: pip

branches:
  only:
    - master
    - /^\d\.\d$/

matrix:
  fast_finish: true
  allow_failures:
    - env: OPTIONAL=true
  include:
    - os: linux
      language: c
      compiler: clang
      # gcc also works, but to keep the # of concurrent builds down, we use one C
      # compiler here and the other to run the coverage build. Clang is preferred
      # in this instance for its better error messages.
      env: TESTING=cpython
    - os: osx
      language: c
      compiler: clang
      # Testing under macOS is optional until testing stability has been demonstrated.
      env: OPTIONAL=true
    - os: linux
      language: python
      python: 3.6
      env: TESTING=docs
      before_script:
        - cd Doc
        # Sphinx is pinned so that new versions that introduce new warnings won't suddenly cause build failures.
        # (Updating the version is fine as long as no warnings are raised by doing so.)
        - python -m pip install sphinx~=1.6.1
      script:
        - make check suspicious html SPHINXOPTS="-q -W -j4"
    - os: linux
      language: c
      compiler: gcc
      env: OPTIONAL=true
      before_script:
        - |
            if ! git diff --name-only $TRAVIS_COMMIT_RANGE | grep -qvE '(\.rst$)|(^Doc)|(^Misc)'
            then
              echo "Only docs were updated, stopping build process."
              exit
            fi
            ./configure
            make -s -j4
            # Need a venv that can parse covered code.
            ./python -m venv venv
            ./venv/bin/python -m pip install -U coverage
      script:
        # Skip tests that re-run the entire test suite.
        - ./venv/bin/python -m coverage run --pylib -m test -uall,-cpu,-tzdata -x test_multiprocessing_fork -x test_multiprocessing_forkserver -x test_multiprocessing_spawn
      after_script:  # Probably should be after_success once test suite updated to run under coverage.py.
        # Make the `coverage` command available to Codecov w/ a version of Python that can parse all source files.
        - source ./venv/bin/activate
        - bash <(curl -s https://codecov.io/bash)

# Travis provides only 2 cores, so don't overdo the parallelism and waste memory.
before_script:
  - |
      if ! git diff --name-only $TRAVIS_COMMIT_RANGE | grep -qvE '(\.rst$)|(^Doc)|(^Misc)'
      then
        echo "Only docs were updated, stopping build process."
        exit
      fi
      ./configure --with-pydebug
      make -j4

script:
  # `-r -w` implicitly provided through `make buildbottest`.
  - make buildbottest TESTOPTS="-j4 -uall,-cpu,-tzdata"

notifications:
  email: false
  irc:
    channels:
      # This is set to a secure variable to prevent forks from notifying the
      # IRC channel whenever they fail a build. This can be removed when travis
      # implements https://github.com/travis-ci/travis-ci/issues/1094.
      # The actual value here is: irc.freenode.net#python-dev
      - secure: "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"
    on_success: change
    on_failure: always
    skip_join: true