XM Hell

gistfile1.go

package main

import (
	"encoding/xml"
	"fmt"
)

// Envelope : is the parent XML and holds all information about a VM
type Envelope struct {
	XMLName xml.Name      `xml:"Envelope"`
	BuildID string        `xml:"vmwbuildId,attr"`
	XMLNS   string        `xml:"xmlns,attr"`
	CIM     string        `xml:"xmlns:cim,attr"`
	OVF     string        `xml:"xmlns:ovf,attr"`
	RASD    string        `xml:"xmlns:rasd,attr"`
	VMW     string        `xml:"xmlns:vmw,attr"`
	VSSD    string        `xml:"xmlns:vssd,attr"`
	XSI     string        `xml:"xmlns:xsi,attr"`
	File    []References  `xml:"References>File"`
	Disk    []DiskSection `xml:"DiskSection"`
	Net     NetSection    `xml:"NetworkSection"`
	VM      VirtualSystem `xml:"VirtualSystem"`
}

// References : Contains the references to additional files
type References struct {
	OVFHREF string `xml:"ovf:href,attr"`
	OVFID   string `xml:"ovf:id,attr"`
	OVFSIZE string `xml:"ovf:size,attr"`
}

// DiskSection : Defines the disks attached to the VM
type DiskSection struct {
	DiskInfo string `xml:"Info"`
	Disk     []DiskDetails
}

// DiskDetails : Details all of the parts of a disk
type DiskDetails struct {
	OVFCAP     string `xml:"ovf:capacity,attr"`
	OVCAPUNITS string `xml:"ovf:capacityAllocationUnits,attr"`
	OVFDISKID  string `xml:"ovf:diskId,attr"`
	OVFFILEREF string `xml:"ovf:fileRef,attr"`
	OVFFORMAT  string `xml:"ovf:format,attr"`
	OVFPOPSIZE string `xml:"ovf:populatedSize,attr"`
}

// NetSection : Details the networking configuration
type NetSection struct {
	NetInfo string `xml:"Info"`
	Network struct {
		NetName string `xml:"ovf:name,attr"`
		NetDesc string `xml:"Description"`
	} `xml:"Network"`
}

// VirtualSystem : The overall struct that details the Virtual Machine
type VirtualSystem struct {
	VID        string `xml:"ovf:id,attr"`
	VInfo      string `xml:"Info"`
	VName      string `xml:"Name"`
	VOSSection struct {
		VOSID   string `xml:"ovf:id,attr"`
		VOSType string `xml:"ovf:osType,attr"`
		VOSInfo string `xml:"Info"`
		VOSDesc string `xml:"Description"`
	} `xml:"OperatingSystemSection"`
	VHardware struct {
		Hardware []VirtualHardware
	} `xml:"VirtualHardwareSection"`
}

// VirtualHardware : The overall struct that details the Virtual Machine
type VirtualHardware struct {
}

func main() {

	var envelope Envelope

	envelope.BuildID = "build123"

	var newDiskSection DiskSection

	appendFilesToReferences(&envelope, "Other_Linux_3.x_kernel_64-bit-disk1.vmdk", "file1", "100004")
	appdendDiskToDiskSection(&newDiskSection, "8", "byte * 2^30", "file1", "vmdisk1", "http://format", "0")
	appdendDiskToDiskSection(&newDiskSection, "8", "byte * 2^30", "file1", "vmdisk1", "http://format", "0")
	appdendDiskToDiskSection(&newDiskSection, "8", "byte * 2^30", "file1", "vmdisk1", "http://format", "0")

	newDiskSection.DiskInfo = "Awesome New Disk"
	envelope.Disk = append(envelope.Disk, newDiskSection)

	var net NetSection
	net.NetInfo = "List of Networks"
	net.Network.NetName = "VM Network"
	net.Network.NetDesc = "Default Network"
	envelope.Net = net

	output, err := xml.MarshalIndent(envelope, "  ", "    ")
	if err != nil {
		fmt.Printf("error: %v\n", err)
	}
	var xmlOutput string
	xmlOutput = xml.Header + string(output)
	fmt.Println(xmlOutput)
}

func appendFilesToReferences(references *Envelope, ovfHref string, ovfID string, ovfSize string) {
	var newFile References
	newFile.OVFHREF = ovfHref
	newFile.OVFID = ovfID
	newFile.OVFSIZE = ovfSize
	references.File = append(references.File, newFile)
}

func appdendDiskToDiskSection(disksection *DiskSection, ovfCapacity string, ovfCapUnits string, ovfDiskID string, ovfFileRef string, ovfFormat string, ovfPopSize string) {
	var newDisk DiskDetails
	newDisk.OVFCAP = ovfCapacity
	newDisk.OVCAPUNITS = ovfCapUnits
	newDisk.OVFDISKID = ovfDiskID
	newDisk.OVFFILEREF = ovfFileRef
	newDisk.OVFFORMAT = ovfFormat
	newDisk.OVFPOPSIZE = ovfPopSize
	disksection.Disk = append(disksection.Disk, newDisk)
}