pipelines:
  default:
    - step:
        name: MSRV
        image: rust:1.37.0
        caches:
          - cargo
          - rust-target
        script:
          # 1.37.0 is too old to use the current Cargo.lock format
          - rm Cargo.lock
          - cargo build
          - cargo test
    - step:
        name: Stable
        image: rust:latest
        caches:
          - cargo
          - rust-target
        script:
          - rustup component add rustfmt
          - cargo fmt --check
          - cargo build
          - cargo test
    - step:
        name: Nightly
        image: rustlang/rust:nightly
        caches:
          - cargo
          - rust-target
        script:
          # ensure that benchmarks build
          - cargo build --all-targets
          - cargo test

definitions:
  caches:
    cargo: /usr/local/cargo # CARGO_HOME
    rust-target: target