Create a blank Hyper-V VM in the correct location

create-vm.ps1

$ErrorActionPreference="Stop"

$vmname = read-host 'What name should the new VM have?'
$destdrive = read-host 'What drive should the new VM live on?'
$sourcevhdx = read-host 'What is the full path to the source VHDX? (enter for blank)'
$lan = read-host 'What virtual switch (name) should the VM be connected to? (enter for default)'

$destpath = $destdrive + ':\HyperV'

$vmrootpath = join-path $destpath $vmname

if (test-path -path $vmrootpath) {
    $yn = read-host "Export directory $vmrootpath exists - remove? y/n"
    if ($yn -eq "y") {
        write-host "Removing $vmrootpath"
        remove-item -recurse $vmrootpath
    } else {
        write-host "Exiting"
        exit
    }
}

new-vm -name $vmname -memorystartupbytes 4096mb -generation 2

set-vmprocessor $vmname -count 2

export-vm -name $vmname -path $destpath

remove-vm -name $vmname -force

$configpath = join-path $vmrootpath "Virtual Machines"
$vhdpath = join-path $vmrootpath "Virtual Hard Disks"

import-vm -path (get-childitem $configpath -file).fullname

$vhdx = join-path $vhdpath ($vmname + '.vhdx')

if ($sourcevhdx) {
	write-host Copying source VHDX to $vhdx
	copy-item $sourcevhdx $vhdx
} else {
	write-host "Creating blank 20GB dynamic VHDX at $vhdx"
	new-vhd -path $vhdx -sizebytes 20GB
}

Add-VMHardDiskDrive -vmname $vmname -controllertype scsi -path $vhdx

set-vmfirmware -vmname $vmname -bootorder (Get-VMHardDiskDrive -vmname $vmname)

if ($lan) {
	Connect-VMNetworkAdapter -VMName $vmname -switchname $lan
} else {
    $sw = Get-VMSwitch | select-object -first 1
    $sw | Connect-VMNetworkAdapter -VMName $vmname
}

write-host All done.