language: python
dist: bionic

# We use two different caching strategies.  The default is to cache pip
# packages (as most of our jobs use pip packages), which is configured here.
# For the integration tests, we instead want to cache the lxd images.  The
# directory in which the images are stored (/var/snap/lxd/common/lxd/images/)
# is not readable/writeable by the default user (which is a requirement for
# caching), so we instead cache the `lxd_images/` directory.  We move lxd
# images out of there before we run tests and back in once tests are complete.
# We _move_ the images out and only copy the most recent lxd image back into
# the cache, to avoid our cache growing without bound.  (We only need the most
# recent lxd image because the integration tests only use a single image.)
#
# We cache the lxd images because this saves a few seconds in the general
# case, but provides substantial speed-ups when cloud-images.ubuntu.com, the
# source of the images, is under heavy load.
cache: pip

install:
    # Required so `git describe` will definitely find a tag; see
    # https://github.com/travis-ci/travis-ci/issues/7422
    - git fetch --unshallow
    - pip install tox

script:
    - tox

matrix:
    fast_finish: true
    include:
        - python: 3.6
          env:
              TOXENV=py3
              PYTEST_ADDOPTS=-v  # List all tests run by pytest
        - if: NOT branch =~ /^ubuntu\//
          cache:
              - directories:
                  - lxd_images
          before_cache:
              - |
                  # Find the most recent image file
                  latest_file="$(sudo ls -Art /var/snap/lxd/common/lxd/images/ | tail -n 1)"
                  # This might be <hash>.rootfs or <hash>, normalise
                  latest_file="$(basename $latest_file .rootfs)"
                  # Find all files with that prefix and copy them to our cache dir
                  sudo find /var/snap/lxd/common/lxd/images/ -name $latest_file* -print -exec cp {} lxd_images/ \;
          install:
            - git fetch --unshallow
            - sudo apt-get build-dep -y cloud-init
            - sudo apt-get install -y --install-recommends sbuild ubuntu-dev-tools fakeroot tox
            # These are build deps but not pulled in by the build-dep call above
            - sudo apt-get install -y --install-recommends dh-systemd python3-coverage python3-pytest python3-pytest-cov
            - pip install .
            - pip install tox
            # bionic has lxd from deb installed, remove it first to ensure
            # pylxd talks only to the lxd from snap
            - sudo apt remove --purge lxd lxd-client
            - sudo rm -Rf /var/lib/lxd
            - sudo snap install lxd
            - sudo lxd init --auto
            - sudo mkdir --mode=1777 -p /var/snap/lxd/common/consoles
            # Move any cached lxd images into lxd's image dir
            - sudo find lxd_images/ -type f -print -exec mv {} /var/snap/lxd/common/lxd/images/ \;
            - sudo usermod -a -G lxd $USER
            - sudo sbuild-adduser $USER
            - cp /usr/share/doc/sbuild/examples/example.sbuildrc /home/$USER/.sbuildrc
          script:
            # Ubuntu LTS: Build
            - ./packages/bddeb -S
            # Use this to get a new shell where we're in the sbuild group
            - sudo -E su $USER -c 'mk-sbuild xenial'
            - sudo -E su $USER -c 'sbuild --nolog --no-run-lintian --verbose --dist=xenial cloud-init_*.dsc'
            # Ubuntu LTS: Integration
            - sg lxd -c 'tox -e citest -- run --verbose --preserve-data --data-dir results --os-name xenial --test modules/apt_configure_sources_list.yaml --test modules/ntp_servers --test modules/set_password_list --test modules/user_groups --deb cloud-init_*_all.deb'
        - python: 3.5
          env:
              TOXENV=xenial
              PYTEST_ADDOPTS=-v  # List all tests run by pytest
          dist: xenial
        - python: 3.6
          env: TOXENV=flake8
        - python: 3.6
          env: TOXENV=pylint