gha-wrapper-pinspawn.sh

#!/bin/bash -eu

action_root="$(dirname "$(realpath "$BASH_SOURCE")")"

case "$INPUT_SHELL" in
  '')
    device="$(sudo losetup -fP --show "$INPUT_IMAGE")"
    if sudo systemd-nspawn --quiet --image "${device}p2" which bash > /dev/null; then
      shell_command='bash -e {0}'
    else
      echo "Warning: Falling back to sh because bash wasn't found!"
      shell_command='sh -e {0}'
    fi
    sudo losetup -d "$device"
    ;;
  'bash')
    device="$(sudo losetup -fP --show "$INPUT_IMAGE")"
    if sudo systemd-nspawn --quiet --image "${device}p2" which bash > /dev/null; then
      shell_command='bash --noprofile --norc -eo pipefail {0}'
    else
      echo "Warning: Falling back to sh because bash wasn't found!"
      shell_command='sh -e {0}'
    fi
    sudo losetup -d "$device"
    ;;
  'python')
    shell_command='python {0}'
    ;;
  'sh')
    shell_command='sh -e {0}'
    ;;
  *)
    shell_command="$INPUT_SHELL"
    ;;
esac

boot_run_service=""
if [ "$INPUT_BOOT" == "true" ]; then
  boot_run_service="$action_root/default-boot-run.service"
  if [ ! -z "$INPUT_RUN_SERVICE" ]; then
    boot_run_service="$INPUT_RUN_SERVICE"
  fi
fi

echo "Running pinspawn.sh \"$INPUT_IMAGE\" \"$INPUT_USER\" \"$boot_run_service\" \"$INPUT_ARGS\" \"$shell_command\"..."
echo "$INPUT_RUN" | \
  "$action_root/pinspawn.sh" \
    "$INPUT_IMAGE" "$INPUT_USER" "$boot_run_service" "$INPUT_ARGS" "$shell_command"