Clippy lints in your Pull Requests

This GitHub Action executes clippy and posts all lints as annotations for the pushed commit, as in the live example here.

This example is utilizing components-nightly and toolchain Actions to install the most recent nightly clippy version.

on: push
name: Clippy check
jobs:
  clippy_check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - id: component
        uses: actions-rs/components-nightly@v1
        with:
          component: clippy
      - uses: actions-rs/toolchain@v1
        with:
            toolchain: ${{ steps.component.outputs.toolchain }}
            override: true
      - run: rustup component add clippy
      - uses: actions-rs/clippy-check@v1
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          args: --all-features

on: push
name: Clippy check
jobs:
  clippy_check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - run: rustup component add clippy
      - uses: actions-rs/clippy-check@v1
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          args: --all-features

For extra details about the toolchain, args and use-cross inputs, see cargo Action documentation.

NOTE: if your workflow contains multiple instances of the clippy-check action you will need to give each invocation a unique name, using the name property described above. Check runs must have a unique name, and this prevents a later check run overriding a previous one within the same workflow.

Due to token permissions, this Action WILL NOT be able to post clippy annotations for Pull Requests from the forked repositories.

This is a pretty big problem, which can be solved only by Github themselves, see #2 for details.
As a fallback this Action will output all clippy messages into the stdout and fail the result correspondingly.