name: Set up libFuzzer toolchain
description: >
  Install the Rust nightly toolchain (with llvm-tools-preview, required by
  cargo-fuzz and llvm-cov) and cargo-fuzz itself. The repository and
  logos-execution-zone must already be checked out before this runs.

runs:
  using: composite
  steps:
    - name: Install Rust nightly + llvm-tools-preview
      uses: dtolnay/rust-toolchain@nightly
      with:
        components: llvm-tools-preview

    - name: Install cargo-fuzz
      shell: bash
      run: cargo install cargo-fuzz