language: rust
rust:
  # error on #[non_exhaustive] being "experimental"
  # - 1.36.0
  # - 1.37.0
  # error on cfg(doctest)
  # - 1.38.0
  # - 1.39.0
  - 1.40.0
  - 1.41.0
  - 1.42.0
  - 1.43.0
  - 1.44.0
  - 1.45.0
  - 1.46.0
  - 1.47.0
  - 1.48.0
  - 1.49.0
  - 1.50.0
  - 1.51.0
  - 1.52.0
  - stable
  - beta
  - nightly
matrix:
  allow_failures:
    - rust: nightly

  include:
    # Rustfmt
    - rust: stable
      install:
        - rustup component add rustfmt-preview
      before_script:
        - cargo fmt --version
      script:
        - cargo fmt -- --check
      env:
        - CHECK_FORMAT=true

    # Clippy
    - rust: stable
      install:
        - rustup component add clippy-preview
      script:
        # Fail if clippy output contains "error:" or "warning:"
        - cargo clippy 2>&1 | tee ./clippy.out && ! grep -qe  "error:\|warning:" ./clippy.out
      env:
        - CHECK_SYNTAX=true

    # Test coverage (with Tarpaulin)
    - rust: stable
      # To avoid "Error: EPERM: operation not permitted" error (see https://github.com/valery-barysok/session-file-store/issues/58)
      sudo: true
      install:
        - RUSTFLAGS="--cfg procmacro2_semver_exempt" cargo install cargo-tarpaulin --force
      script:
        - cargo tarpaulin -v --ciserver travis-ci --coveralls $TRAVIS_JOB_ID
      env:
        - COVERAGE_MEASUREMENT=true

script:
  - cargo test

# Need to cache the whole `.cargo` directory to keep .crates.toml for
# cargo-update to work
cache:
  directories:
    - /home/travis/.cargo

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

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