ci.yml

name: CI
on:
  pull_request:
  push:
    branches: [main]

env:
  # disable incremental compilation.
  #
  # incremental compilation is useful as part of an edit-build-test-edit cycle,
  # as it lets the compiler avoid recompiling code that hasn't changed. however,
  # on CI, we're not making small edits; we're almost always building the entire
  # project from scratch. thus, incremental compilation on CI actually
  # introduces *additional* overhead to support making future builds
  # faster...but no future builds will ever occur in any given CI environment.
  #
  # see https://matklad.github.io/2021/09/04/fast-rust-builds.html#ci-workflow
  # for details.
  CARGO_INCREMENTAL: 0
  # allow more retries for network requests in cargo (downloading crates) and
  # rustup (installing toolchains). this should help to reduce flaky CI failures
  # from transient network timeouts or other issues.
  CARGO_NET_RETRY: 10
  RUSTUP_MAX_RETRIES: 10

jobs:
  check-idol:
    name: Check idol codegen
    runs-on: ubuntu-latest
    strategy:
      matrix:
        rust:
        - "stable"
        # the current pinned Rust toolchain in the Hubris repo:
        # https://github.com/oxidecomputer/hubris/blob/master/rust-toolchain.toml
        #
        # when updating Hubris' Rust toolchain, make sure to update this, too!
        # TODO(eliza): it would be nice to determine this automatically...
        - "nightly-2022-11-01"
    steps:
    - uses: actions/checkout@v2
    - uses: actions-rs/toolchain@v1
      with:
        profile: minimal
        toolchain: ${{ matrix.rust }}
        override: true
    - uses: Swatinem/rust-cache@v1
    - run: cargo check -p idol

  check-runtime:
    name: Check idol-runtime
    runs-on: ubuntu-latest
    strategy:
      matrix:
        rust:
        # the current pinned Rust toolchain in the Hubris repo:
        # https://github.com/oxidecomputer/hubris/blob/master/rust-toolchain.toml
        #
        # when updating Hubris' Rust toolchain, make sure to update this, too!
        # TODO(eliza): it would be nice to determine this automatically...
        - "nightly-2022-11-01"
        target:
        - "thumbv6m-none-eabi"
        - "thumbv7em-none-eabihf"
        - "thumbv8m.main-none-eabihf"
    steps:
    - uses: actions/checkout@v2
    - uses: actions-rs/toolchain@v1
      with:
        profile: minimal
        toolchain: ${{ matrix.rust }}
        target: ${{ matrix.target }}
        override: true
    - uses: Swatinem/rust-cache@v1
    - run: cargo check -p idol-runtime --target ${{ matrix.target }}

  rustfmt:
    name: rustfmt
    runs-on: ubuntu-latest
    strategy:
      matrix:
        rust:
        - "stable"
    steps:
    - uses: actions/checkout@v2
    - uses: actions-rs/toolchain@v1
      with:
        profile: minimal
        toolchain: ${{ matrix.rust }}
        override: true
    - uses: Swatinem/rust-cache@v1
    - run: cargo fmt --check