# required because of tarpaulin dependency
sudo: required

language: rust

# only build pushes to master
# prs are build separately
# https://docs.travis-ci.com/user/pull-requests/#how-pull-requests-are-built
branches:
  only:
  - master

matrix:
  fast_finish: true
  include:
  - rust: nightly
  - rust: beta
  - rust: stable

install: |
  if [[ "$TRAVIS_RUST_VERSION" == nightly ]]; then
    # see also https://github.com/xd009642/tarpaulin/issues/150 for tarpaulin nightly dependency
    RUSTFLAGS="--cfg procmacro2_semver_exempt" cargo install cargo-tarpaulin -f
    # should only be necessary until rustfmt produces consistent results in stable/nightly
    rustup component add rustfmt
  fi

script:
- |
   if [[ "$TRAVIS_RUST_VERSION" == nightly ]]; then
     cargo fmt --all -- --check
   fi
- cargo test

# Cache `cargo install`ed tools, but don't cache the project's `target`
# directory (which ends up over-caching and filling all disk space!)
# https://levans.fr/rust_travis_cache.html
cache:
  directories:
    - /home/travis/.cargo

before_cache:
  # But don't cache the cargo registry
  - rm -rf /home/travis/.cargo/registry

addons:
  apt:
    packages:
      # required by tarpaulin code coverage tool
      - libssl-dev

after_success:
  # report coverage to coveralls
  # see https://github.com/xd009642/tarpaulin for more information
  - '[ $TRAVIS_EVENT_TYPE != "cron" ] &&
    [ $TRAVIS_RUST_VERSION = stable ] &&
    [ $TRAVIS_BRANCH = master ] &&
    [ $TRAVIS_PULL_REQUEST = false ] &&
    cargo +nightly tarpaulin --ciserver travis-ci --coveralls $TRAVIS_JOB_ID || true'
  - '[ $TRAVIS_RUST_VERSION = stable ] &&
    [ $TRAVIS_BRANCH = master ] &&
    [ $TRAVIS_PULL_REQUEST = false ]
    && cargo doc --no-deps &&
    echo "<meta http-equiv=refresh content=0;url=`echo $TRAVIS_REPO_SLUG | cut -d / -f 2`/index.html>" > target/doc/index.html'

deploy:
  provider: pages
  skip-cleanup: true
  github-token: $GH_TOKEN
  local-dir: target/doc
  keep-history: false
  on:
    branch: master
    condition: $TRAVIS_RUST_VERSION = stable