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

# To cache doc-building dependencies and C compiler output.
cache:
    - pip
    - ccache

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: 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 blurb
      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
            # Build in release mode
            ./configure PYTHON_FOR_REGEN=python3
            make -s -j4
            # Need a venv that can parse covered code.
            ./python -m venv venv
            ./venv/bin/python -m pip install -U coverage
            ./venv/bin/python -m test.pythoninfo
      script:
        # Skip tests that re-run the entire test suite.
        - ./venv/bin/python -m coverage run --pylib -m test -uall,-cpu -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:
  - |
      set -e
      if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then
        files_changed=$(git diff --name-only $TRAVIS_COMMIT_RANGE)
      else
        # Pull requests are slightly complicated because merging the PR commit without
        # rebasing causes it to retain its old commit date. Meaning in history if any
        # commits have been made on master that post-date it, they will be accidentally
        # included in the diff if we use the TRAVIS_COMMIT_RANGE variable.
        files_changed=$(git diff --name-only HEAD $(git merge-base HEAD $TRAVIS_BRANCH))
      fi

      # Prints changed files in this commit to help debug doc-only build issues.
      echo "Files changed: "
      echo $files_changed

      if ! echo $files_changed | grep -qvE '(\.rst$)|(^Doc)|(^Misc)'
      then
        echo "Only docs were updated, stopping build process."
        exit
      fi
      # Build in debug mode
      ./configure --with-pydebug PYTHON_FOR_REGEN=python3
      make -j4
      make -j4 regen-all clinic
      changes=`git status --porcelain`
      if ! test -z "$changes"
      then
        echo "Generated files not up to date"
        echo "$changes"
        exit 1
      fi
      make pythoninfo

script:
  # Using the built Python as patchcheck.py is built around the idea of using
  # a checkout-build of CPython to know things like what base branch the changes
  # should be compared against.
  # Only run on Linux as the check only needs to be run once.
  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then ./python Tools/scripts/patchcheck.py --travis $TRAVIS_PULL_REQUEST; fi
  # `-r -w` implicitly provided through `make buildbottest`.
  - make buildbottest TESTOPTS="-j4 -uall,-cpu"

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