Power of Golang Templating Engine

template_wizardry.json

{
    "variables": {
        "option_1": "foo",
        "option_2": "bar"
    },
    "builders": [
        {
            "type": "null",
            "name": "AWESOME-POSSUM",
            "communicator": "none"
        }
    ],
    "provisioners": [
        {
            "type": "shell-local",
            "inline": "echo {{with split build_name \"-\" 0}}{{if eq . \"AWESOME\"}}{{ user `option_1` }}{{else}}{{user `option_2`}}{{ end }}{{end}}"
        }
    ]
}