{
    "type": "object",
    "properties": {
        "name": {
            "type": "string"
        },
        "versions": {
            "type": "array",
            "items": {
                "type": "object",
                "properties": {
                    "major_version": {
                        "type": "string"
                    },
                    "minor_version": {
                        "type": "string"
                    },
                    "patch_version": {
                        "type": "string"
                    },
                    "codename": {
                        "type": "string"
                    },
                    "iso_url": {
                        "type": "string"
                    },
                    "iso_checksum": {
                        "type": "string"
                    },
                    "name": {
                        "type": "string"
                    }
                },
                "required": [
                    "major_version",
                    "minor_version",
                    "iso_url",
                    "iso_checksum"
                ],
                "optional": [
                    "patch_version",
                    "codename",
                    "name"
                ],
                "additionalProperties": false
            },
            "minItems": 1
        },
        "boot_command": {
            "type": "string"
        },
        "qemu": {
            "type": "object",
            "properties": {
                "accelerator": {
                    "type": "string",
                    "enum": [
                        "none",
                        "kvm",
                        "tcg",
                        "xen"
                    ]
                },
                "disk_cache": {
                    "type": "string",
                    "enum": [
                        "writethrough",
                        "writeback",
                        "none",
                        "unsafe",
                        "directsync"
                    ]
                },
                "disk_discard": {
                    "type": "string",
                    "enum": [
                        "unmap",
                        "ignore"
                    ]
                },
                "disk_image": {
                    "type": "boolean"
                },
                "disk_interface": {
                    "type": "string",
                    "enum": [
                        "ide",
                        "scsi",
                        "virtio"
                    ]
                },
                "floppy_files": {
                    "type": "array",
                    "items": {
                        "type": "string"
                    }
                },
                "machine_type": {
                    "type": "string"
                },
                "net_device": {
                    "type": "string",
                    "enum": [
                        "ne2k_pci",
                        "i82551",
                        "i82557b",
                        "i82559er",
                        "rtl8139",
                        "e1000",
                        "pcnet",
                        "virtio"
                    ]
                },
                "qemu_binary": {
                    "type": "string"
                },
                "qemuargs": {
                    "type": "array",
                    "items": {
                        "type": "array",
                        "items": {
                            "type": "string"
                        }
                    }
                },
                "vnc_port_min": {
                    "type": "integer"
                },
                "vnc_port_max": {
                    "type": "integer"
                }
            },
            "optional": [
                "accelerator",
                "disk_cache",
                "disk_discard",
                "disk_image",
                "disk_interface",
                "floppy_files",
                "machine_type",
                "net_device",
                "qemu_binary",
                "qemuargs",
                "vnc_port_min",
                "vnc_port_max"
            ],
            "additionalProperties": false
        },
        "virtualbox": {
            "type": "object",
            "properties": {
                "export_opts": {
                    "type": "array",
                    "items": {
                        "type": "string"
                    }
                },
                "guest_additions_mode": {
                    "type": "string",
                    "enum": [
                        "upload",
                        "attach",
                        "disable"
                    ]
                },
                "guest_additions_path": {
                    "type": "string"
                },
                "guest_additions_sha256": {
                    "type": "string"
                },
                "guest_additions_url": {
                    "type": "string"
                },
                "guest_os_type": {
                    "type": "string"
                },
                "hard_drive_interface": {
                    "type": "string",
                    "enum": [
                        "ide",
                        "sata",
                        "scsi"
                    ]
                },
                "iso_interface": {
                    "type": "string",
                    "enum": [
                        "ide",
                        "sata"
                    ]
                },
                "vboxmanage": {
                    "type": "array",
                    "items": {
                        "type": "array",
                        "items": {
                            "type": "string"
                        }
                    }
                },
                "vboxmanage_post": {
                    "type": "array",
                    "items": {
                        "type": "array",
                        "items": {
                            "type": "string"
                        }
                    }
                },
                "virtualbox_version_file": {
                    "type": "string"
                }
            },
            "optional": [
                "export_opts",
                "guest_additions_mode",
                "guest_additions_path",
                "guest_additions_sha256",
                "guest_additions_url",
                "guest_os_type",
                "hard_drive_interface",
                "iso_interface",
                "vboxmanage",
                "vboxmanage_post",
                "virtualbox_version_file"
            ],
            "additionalProperties": false
        }
    },
    "required": [
        "name",
        "versions",
        "boot_command"
    ],
    "optional": [
        "qemu",
        "virtualbox"
    ],
    "additionalProperties": false
}