"This is a small script that validates the existence of the 'docker' or 'podman' command to be used."

valid_podman.sh

#!/bin/sh

# This script is used to check if the podman or docker command is available
# Author: @rafex (Raúl González)

pods_manager_command_name="docker"

function valid_podman() {
  if ! pods_manager_loc="$(type -p "$pods_manager_command_name")" || [[ -z $pods_manager_loc ]]; then
    echo "$pods_manager_command_name not found, trying with podman"
    pods_manager_command_name="podman"

    alias docker=podman
    return 0
  fi
}

valid_podman