packer/command/test-fixtures/build-only/template.json

{
    "builders": [
        {
            "name":"chocolate",
            "type":"file",
            "content":"chocolate",
            "target":"chocolate.txt"
        },
        {
            "name":"vanilla",
            "type":"file",
            "content":"vanilla",
            "target":"vanilla.txt"
        },
        {
            "name":"cherry",
            "type":"file",
            "content":"cherry",
            "target":"cherry.txt"
        }
    ]
}