DSCResources/MSFT_xMountImage/MSFT_xMountImage.psm1
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function Get-TargetResource { [CmdletBinding()] [OutputType([System.Collections.Hashtable])] param ( [parameter(Mandatory = $true)] [System.String] $Name, [parameter(Mandatory = $true)] [System.String] $ImagePath ) #Validate driveletter has a ":" If($DriveLetter -match "^[A-Za-z][:]$") { Write-Verbose "DriveLetter validation passed." } Else { Throw "DriveLetter did not pass validation. Ensure DriveLetter contains a letter and a colon." } #Test for Image mounted. If not mounted mount $Image = Get-DiskImage -ImagePath $ImagePath | Get-Volume If($Image) { $EnsureResult = 'Present' $Name = $Name } Else { $EnsureResult = 'Absent' $Name = $null } $returnValue = @{ Name = [System.String]$Name ImagePath = [System.String]$ImagePath DriveLetter = [System.String]$Image.DriveLetter Ensure = [System.String]$EnsureResult } $returnValue } function Set-TargetResource { [CmdletBinding()] param ( [parameter(Mandatory = $true)] [System.String] $Name, [parameter(Mandatory = $true)] [System.String] $ImagePath, [System.String] $DriveLetter, [ValidateSet("Present","Absent")] [System.String] $Ensure = 'Present' ) #Validate driveletter has a ":" If($DriveLetter -match "^[A-Za-z][:]$") { Write-Verbose "DriveLetter validation passed." } Else { Throw "DriveLetter did not pass validation. Ensure DriveLetter contains a letter and a colon." } #Test for Image mounted. If not mounted mount $Image = Get-DiskImage -ImagePath $ImagePath | Get-Volume If($Ensure -eq 'Present') { $Image = Get-DiskImage -ImagePath $ImagePath | Get-Volume If(!$Image) { Write-Verbose "Image is not mounted. Mounting image $ImagePath" $Image = Mount-DiskImage -ImagePath $ImagePath -PassThru | Get-Volume } #Verify drive letter $CimVolume = Get-CimInstance -ClassName Win32_Volume | where {$_.DeviceId -eq $Image.ObjectId} If($CimVolume.DriveLetter -ne $DriveLetter) { Write-Verbose "Drive letter does not match expected value. Expected DriveLetter $DriveLetter Actual DriverLetter $($CimVolume.DriveLetter)" Write-Verbose "Changing drive letter to $DriveLetter" Set-CimInstance -InputObject $CimVolume -Property @{DriveLetter = $DriveLetter} } } Else { Write-Verbose "Dismounting $ImagePath" Dismount-DiskImage -ImagePath $ImagePath } } function Test-TargetResource { [CmdletBinding()] [OutputType([System.Boolean])] param ( [parameter(Mandatory = $true)] [System.String] $Name, [parameter(Mandatory = $true)] [System.String] $ImagePath, [System.String] $DriveLetter, [ValidateSet("Present","Absent")] [System.String] $Ensure = 'Present' ) #Validate driveletter has a ":" If($DriveLetter -match "^[A-Za-z][:]$") { Write-Verbose "DriveLetter validation passed." } Else { Throw "DriveLetter did not pass validation. Ensure DriveLetter contains a letter and a colon." } #Test for Image mounted. If not mounted mount $Image = Get-DiskImage -ImagePath $ImagePath | Get-Volume If($Ensure -eq 'Present') { $Image = Get-DiskImage -ImagePath $ImagePath | Get-Volume If(!$Image) { Write-Verbose "Image is not mounted. Mounting image $ImagePath" return $false } #Verify drive letter $CimVolume = Get-CimInstance -ClassName Win32_Volume | where {$_.DeviceId -eq $Image.ObjectId} If($CimVolume.DriveLetter -ne $DriveLetter) { Write-Verbose "Drive letter does not match expected value. Expected DriveLetter $DriveLetter Actual DriverLetter $($CimVolume.DriveLetter)" return $false } #If the script made it this far the ISO is mounted and has the desired DriveLetter return $true } If($Ensure -eq 'Absent' -and $Image) { Write-Verbose "Expect ISO to be dismounted. Actual is mounted with drive letter $($Image.DriveLetter)" return $false } Else { return $true } } Export-ModuleMember -Function *-TargetResource |