name: Set up AFL++ toolchain
description: >
  Build and install AFL++ from source, then install the Rust stable toolchain
  and cargo-afl. The repository must already be checked out before this runs.

inputs:
  afl-version:
    description: AFL++ git tag to build from source.
    required: false
    default: v4.40c

runs:
  using: composite
  steps:
    - name: Install AFL++ ${{ inputs.afl-version }} from source
      shell: bash
      run: |
        sudo apt-get update -q
        sudo apt-get install -y \
          build-essential python3-dev automake cmake \
          flex bison libglib2.0-dev libpixman-1-dev \
          python3-setuptools ninja-build
        git clone --depth 1 --branch ${{ inputs.afl-version }} \
          https://github.com/AFLplusplus/AFLplusplus /tmp/aflplusplus
        cd /tmp/aflplusplus
        make distrib
        sudo make install
        afl-fuzz --version

    - name: Install Rust (stable)
      uses: dtolnay/rust-toolchain@stable

    - name: Install cargo-afl
      shell: bash
      run: cargo install cargo-afl --locked