Build-PackerImage.ps1

[CmdletBinding()]
param (
	[Parameter()]
	[switch]
	$Capture
)

if ($Capture) {
	if (!([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] 'Administrator')) {
		throw 'Must run as admin to capture.'
	}
}

Import-Module '.\Modules\vmdk.psm1'
$variableFile = '.\vars.pkrvars.hcl'
$packerArgs = @{
	FilePath     = 'packer.exe'
	ArgumentList = "build -force --var-file=$($variableFile) ."
	wait         = $true
	NoNewWindow  = $true
}

Try {
	# Unpack and Provision Image
	Start-Process @packerArgs
}
Catch {
	$_
}

if ($Capture) {
	$OSFMOUNT_DIR = (Get-InstalledSoftware | Where-Object { $_.DisplayName -eq 'OSFMount' }).InstallLocation
	if (!($OSFMOUNT_DIR)) {
		throw 'OSFMount must be installed in order to capture image'
	}
	
	# Mount & Capture
	$drive = (Get-ChildItem function:[d-z]: -n | Where-Object { !(Test-Path $_) })[0]	# NOTE: OSFMount uses the first unused drive letter
	$emojiIcon = [System.Convert]::toInt32('1F604', 16) # Yes I am creating an emoji icon just for this...
	$imagePath = "$PSScriptRoot\CapturedImage.wim"
	Try {
		if (Test-Path $imagePath) {
			Write-Output 'Removing old image...'
			Remove-Item $imagePath -Force
		}

		$startTime = (Get-Date)

		Mount-vmdk -Path '.\output\step-4\disk-cl3.vmdk' | Out-Null
		Write-Output "Capturing image... ( Please be patient $([System.Char]::ConvertFromUtf32($emojiIcon)) this can take a while)"
		New-WindowsImage -ImagePath $imagePath -CapturePath $drive -Name 'Windows10-Enterprise' -CompressionType 'Max' -Verify

		$endTime = (Get-Date)
		$elapsedTime = $endTime - $startTime
		$elapsedMinutes = $elapsedTime.Minutes
		$elapsedSeconds = $elapsedTime.Seconds

		[string]::Format('==> Wait completed after {0} minutes {1} seconds', $elapsedMinutes, $elapsedSeconds)
		Write-Host '==> Wim file was successfully captured and written to disk at ' -NoNewline
		Write-Host "$imagePath" -ForegroundColor Cyan
	}
	Catch {
		Write-Warning 'An error occurred:'
		Write-Host $_
	}
	Finally {
		Dismount-vmdk -Drive $drive
	}

}