language: rust
dist: trusty
sudo: false

cache: cargo

os:
  - linux
  - osx

rust:
  - 1.37.0
  - stable
  - beta
  - nightly

before_script:
  # We install a known-to-have-rustfmt version of the nightly toolchain
  # in order to run the nightly version of rustfmt, which supports rules
  # that we depend upon. When updating, pick a suitable nightly version
  # from https://rust-lang.github.io/rustup-components-history/
  - rustup toolchain install nightly-2019-09-11
  - rustup component add rustfmt --toolchain nightly-2019-09-11
  - rustup component add clippy --toolchain nightly-2019-09-11

script:
  - cargo +nightly-2019-09-11 fmt --all -- --check
  - cargo +nightly-2019-09-11 clippy --all-features -- -D warnings -A clippy::match-ref-pats -A clippy::needless-lifetimes
  - cargo build --verbose
  - export RUST_BACKTRACE=1
  - cargo test --all --verbose
  - cargo test --release --all --verbose
  - if [[ $TRAVIS_RUST_VERSION = nightly* ]]; then
      cargo bench --all --verbose;
    fi