.travis.yml

language: rust

rust:
  - 1.23.0
  - 1.24.0
  - 1.25.0
  - 1.26.0
  - 1.27.0
  - 1.28.0
  - stable
  - beta
  - nightly

matrix:
  allow_failures:
    - rust: nightly
  include:
    # Rustfmt
    - env: RUSTFMT_VERSION="0.4.1"
      rust: nightly-2018-04-01
      install:
        - rustup component add rustfmt-preview
        - cargo install rustfmt-nightly --force --version $RUSTFMT_VERSION || echo "rustfmt already installed"
      before_script:
        - cargo-fmt fmt -- --version
      script:
        - cargo fmt -- --write-mode=diff

    # Clippy
    - env: CLIPPY_VERSION="0.0.191"
      rust: nightly-2018-04-01
      install:
      - travis_wait cargo install clippy --force --version $CLIPPY_VERSION || echo "clippy already installed"
      script:
        # Fail if clippy output contains "error:" or "warning:"
        - cargo clippy 2>&1 | tee ./clippy.out && ! grep -qe  "error:\|warning:" ./clippy.out

    # Test coverage (with Tarpaulin)
    - env: TARPAULIN_VERSION="0.5.6"
      rust: stable
      # To avoid "Error: EPERM: operation not permitted" error (see https://github.com/valery-barysok/session-file-store/issues/58)
      sudo: true
      install:
        - curl -sL https://github.com/xd009642/tarpaulin/releases/download/$TARPAULIN_VERSION/cargo-tarpaulin-$TARPAULIN_VERSION-travis.tar.gz | tar xvz -C $HOME/.cargo/bin
      script:
        - cargo tarpaulin --verbose > ./tarpaulin.out

        # Fetch coverage percentage (integer)
        - COVERAGE=$(cat ./tarpaulin.out | awk -F '.' '/coverage/ { print $1 }')
        - echo COVERAGE=${COVERAGE}

        # Print uncoverted lines
        - 'echo "UNCOVERED LINES" && grep "hits: 0" ./tarpaulin.out'

        # Exit 1, if coverage is less than 89%
        - if [ $COVERAGE -lt 89 ]; then exit 0; fi

cache:
  cargo: true
before_cache:
  # Travis can't cache files that are not readable by "others"
  - chmod -R a+r $HOME/.cargo

script:
  - cargo test

addons:
  apt:
    packages:
      - libssl-dev  # Required for tarpaulin