CircleCI - Rust setup

config.yml

version: 2
jobs:
  build-and-test:
    docker:
      - image: cimg/rust:1.69
    environment:
      # Fail the build if there are warnings
      RUSTFLAGS: '-D warnings'
    steps:
      - checkout
      - run:
          name: Version information
          command: rustc --version; cargo --version; rustup --version
      # If you have committed your Cargo.lock file to version control
      # delete this step.
      - run:
          name: Calculate dependencies
          command: cargo generate-lockfile
      - restore_cache:
          keys:
            - v1-cargo-cache-{{ arch }}-{{ checksum "Cargo.lock" }}
      - run:
          name: Build all targets
          command: cargo build
      - save_cache:
          paths:
            - /home/circleci/.cargo/registry
            - target/debug/.fingerprint
            - target/debug/build
            - target/debug/deps
          key: v1-cargo-cache-{{ arch }}-{{ checksum "Cargo.lock" }}
      - run:
          name: Run all tests
          command: cargo test

  security:
    docker:
      - image: cimg/rust:1.69
    steps:
      - checkout
      - run:
          name: Version information
          command: rustc --version; cargo --version; rustup --version
      - run:
          name: Cache permission
          command: |
            sudo chown -R $(whoami):$(id -ng) /home/circleci/.cargo/bin/cargo
      - restore_cache:
          keys:
            - v1-cargo-audit-{{ arch }}
      - run:
          name: Install dependency auditing tool
          command: cargo install cargo-audit
      - save_cache:
          paths:
            - /home/circleci/.cargo/bin/cargo
          key: v1-cargo-audit-{{ arch }}
      - run:
          name: Check for known security issues in dependencies
          command: cargo audit

  format:
    docker:
      - image: cimg/rust:1.69
    steps:
      - checkout
      - run:
          name: Version information
          command: rustc --version; cargo --version; rustup --version
      - run:
          name: Install formatter
          command: rustup component add rustfmt
      - run:
          name: Formatting
          command: cargo fmt --all -- --check

  lint:
    docker:
      - image: cimg/rust:1.69
    steps:
      - checkout
      - run:
          name: Version information
          command: rustc --version; cargo --version; rustup --version
      - run:
          name: Install Clippy
          command: rustup component add clippy
      - run:
          name: Linting
          command: cargo clippy -- -D warnings

  coverage:
    machine: true
    steps:
      - checkout
      - run:
          name: Coverage with docker
          command: docker run --security-opt seccomp=unconfined -v "${PWD}:/volume" xd009642/tarpaulin cargo tarpaulin --ignore-tests

workflows:
  version: 2
  build-test:
    jobs:
      - build-and-test:
          filters:
            tags:
              only: /.*/
      - security:
          filters:
            tags:
              only: /.*/
      - format:
          filters:
            tags:
              only: /.*/
      - lint:
          filters:
            tags:
              only: /.*/
      - coverage:
          filters:
            tags:
              only: /.*/

No, there isn't! There is only the GitHub Actions version for the follow-up.

Thanks for sharing this, found it useful. It was my 4th highest result of googling circleci caching rust.

A few notes if anyone else ever reads this:

• Since our project is using cargo build --release in one step, we are caching directories in both target/debug/ and target/release/.

• I considered saving the cache after the testing step, but IMO that just took too long to upload the cache.

• To avoid having the value of the caching key specified in multiple places (i.e. checksum "Cargo.lock"), I relied on one of CircleCI's reusability mechanisms (namely the parameters one).