setup-rust-toolchain/.github/workflows/ci.yml

name: CI

on:
  push: { branches: [main] }
  pull_request:
  schedule: [cron: "40 1 * * *"]

jobs:
  install:
    name: Rust ${{matrix.rust || '(default)'}} (toolchain-file=${{matrix.write-toolchain-file}}) (${{matrix.os}})
    runs-on: ${{matrix.os}}
    strategy:
      fail-fast: false
      max-parallel: 5
      matrix:
        os:
          - ubuntu-latest
          - windows-latest
          - macos-latest
        write-toolchain-file:
          - false
          - true
        rust:
          # use stable toolchain as default
          - null

          # Test that the sparse registry check works.
          # 1.66 and 1.67 don't support stable sparse registry.
          - "1.66"

          - "nightly"
          - "beta"
          - "stable"
    steps:
      - uses: actions/checkout@v4

      # Test toolchain file support
      - name: Write rust-toolchain.toml
        if: matrix.write-toolchain-file
        shell: bash
        run: |
          cat <<EOF >>rust-toolchain.toml
          [toolchain]
          channel = "nightly-2024-01-10"
          components = [ "rustfmt", "rustc-dev" ]
          targets = [ "wasm32-unknown-unknown", "thumbv7m-none-eabi" ]
          profile = "minimal"
          EOF

      - id: toolchain
        name: Run actions-rust-lang/setup-rust-toolchain ${{matrix.rust || 'on toolchain file'}}
        uses: ./
        with:
          toolchain: ${{matrix.rust}}
          components: clippy

      - name: Check ${{'${{steps.toolchain.outputs.rustc-version}}'}}
        run: echo '${{steps.toolchain.outputs.rustc-version}}'

      - name: Check ${{'${{steps.toolchain.outputs.cargo-version}}'}}
        run: echo '${{steps.toolchain.outputs.cargo-version}}'

      - name: Check ${{'${{steps.toolchain.outputs.rustup-version}}'}}
        run: echo '${{steps.toolchain.outputs.rustup-version}}'

      - name: Check lack of toolchain input or file results in stable
        if: matrix.write-toolchain-file == false && matrix.rust == null
        shell: bash
        run: |-
          rustcv="$(rustc --version)"
          [[ "$rustcv" != *"nightly"* && "$rustcv" != *"beta"* ]]

      - name: Check toolchain file is being overridden
        if: matrix.write-toolchain-file
        shell: bash
        run: |-
          rustcv="$(rustc --version)"
          [[ ! ( "$rustcv" == *"nightly"* && "$rustcv" == *"2024-01-10"* ) ]]

      - shell: bash
        run: rustc --version && cargo --version

      # Test with creating a small project
      - run: cargo init . --bin --name ci

      # Add tiny empty crate.
      # This checks that registry access works.
      - run: cargo add serde_as

      - run: cargo clippy

  cache:
    name: Cache
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install Rust
        uses: ./
        with:
          components: clippy
          cache: true
          cache-workspaces: |-
            ./test-workspace

      - run: cargo clippy --manifest-path=./test-workspace/Cargo.toml