name: Rust Crate Workflow
description: Build and test your Rust crate

inputs:
  codecov_token:
    required: true
    description: The codecov token used to upload coverage reports.
  working_directory:
    required: false
    default: "."
    description: The working directory for this workflow.

runs:
  using: "composite"
  steps:
    - name: Install cargo-llvm-cov
      uses: taiki-e/install-action@cargo-llvm-cov

    - name: Check Formatting
      working-directory: ${{ inputs.working_directory }}
      shell: bash
      run: cargo fmt --check

    # No explicit build step needed — clippy already compiles all targets.
    - name: Clippy
      working-directory: ${{ inputs.working_directory }}
      shell: bash
      run: cargo clippy --all-targets -- -D warnings

    - name: Test
      working-directory: ${{ inputs.working_directory }}
      shell: bash
      run: cargo llvm-cov --lcov --output-path lcov.info
    
    # Per https://stackoverflow.com/questions/73402042/github-action-expressions-split-string
    - name: Split package name
      env:
        PACKAGE_PATH: ${{ inputs.working_directory}}
      id: split
      shell: bash
      run: echo "package_name=${PACKAGE_PATH##*/}" >> $GITHUB_OUTPUT

    - name: Upload Coverage
      uses: codecov/codecov-action@v7
      with:
        # We use Codecov's carryforward flags to allow our PR testing to only
        # run affected packages, but also allow our coverage information from
        # past runs to "carry forward" on a "per flag" basis.  We tag coverage
        # information with "flags" explaining what directory the coverage is from.
        # https://docs.codecov.com/docs/carryforward-flags
        flags: ${{ steps.split.outputs.package_name }}
        token: ${{ inputs.codecov_token }}