action.yml

name: "Run PiQEMU"
author: ethanjli
description: Uses QEMU to run commands in a VM on a Raspberry Pi SD card image.
branding:
  icon: box
  color: red

inputs:
  image:
    description: Path of the image for the virtual machine
    required: true
  machine:
    description:
      The type of Raspberry Pi for the virtual machine to emulate.
      Currently only `rpi-3b+` is allowed.
    required: true
  args:
    description: Options/args to pass to `qemu-system-aarch64`
    required: false
  shell:
    description: The shell to use for running commands.
    required: false
  run:
    description: Commands to run in the shell.
    required: false
  user:
    description: The user to run commands as.
    required: false
    default: root
  run-service:
    description:
      The systemd service to use for running `shell` with the `run` commands.
    required: false

runs:
  using: composite
  steps:
    - name: Install dependencies for PiQEMU
      shell: bash
      run: |
        is_installed() {
          apt-cache policy "$1" | grep 'Installed:' | grep -v '(none)' > /dev/null
        }

        packages=""
        if ! is_installed systemd-container; then
          packages="$packages systemd-container"
        fi
        if ! is_installed qemu-user-static; then
          packages="$packages qemu-user-static"
        fi
        if ! is_installed binfmt-support; then
          packages="$packages binfmt-support"
        fi
        if ! is_installed qemu-system-aarch64; then
          packages="$packages qemu-system-aarch64"
        fi
        if [ ! -z "$(echo "$packages")" ]; then
          echo "Installing dependencies to run systemd-nspawn and QEMU on non-amd64 images..."
          sudo apt-get update -o Dpkg::Progress-Fancy=0
          sudo apt-get install -o Dpkg::Progress-Fancy=0 $packages
        fi

    - name: Run PiQEMU
      id: run-piqemu
      shell: bash
      env:
        INPUT_IMAGE: ${{ inputs.image }}
        INPUT_MACHINE: ${{ inputs.machine }}
        INPUT_ARGS: ${{ inputs.args }}
        INPUT_SHELL: ${{ inputs.shell }}
        INPUT_RUN: ${{ inputs.run }}
        INPUT_USER: ${{ inputs.user }}
        INPUT_RUN_SERVICE: ${{ inputs.run-service }}
      run: |
        ${{ github.action_path }}/gha-wrapper-piqemu.sh