restore_registry: &RESTORE_REGISTRY
  restore_cache:
    key: registry
save_registry: &SAVE_REGISTRY
  save_cache:
    key: registry-{{ .BuildNum }}
    paths:
    - /usr/local/cargo/registry/index
deps_key: &DEPS_KEY
  key: deps-{{ checksum "~/rust-version" }}-{{ checksum "Cargo.lock" }}
restore_deps: &RESTORE_DEPS
  restore_cache:
    <<: *DEPS_KEY
save_deps: &SAVE_DEPS
  save_cache:
    <<: *DEPS_KEY
    paths:
    - target
    - /usr/local/cargo/registry/cache

version: 2
jobs:
  stable:
    docker:
    - image: rust:1.33.0
    environment:
      RUSTFLAGS: -D warnings
    working_directory: ~/build
    steps:
    - checkout
    - *RESTORE_REGISTRY
    - run: cargo generate-lockfile
    - *SAVE_REGISTRY
    - run: rustc --version > ~/rust-version
    - *RESTORE_DEPS
    - run: cargo test
    - run: cargo test --features std
    - *SAVE_DEPS
  nightly:
    docker:
    - image: rustlang/rust:nightly
    environment:
      RUSTFLAGS: -D warnings
    working_directory: ~/build
    steps:
    - checkout
    - *RESTORE_REGISTRY
    - run: cargo generate-lockfile
    - *SAVE_REGISTRY
    - run: rustc --version > ~/rust-version
    - *RESTORE_DEPS
    - run: cargo test --features alloc
    - *SAVE_DEPS

workflows:
  version: 2
  tests:
    jobs:
    - stable
    - nightly