Generates a Service configuration for DSC based on the local system.

GetServiceDscConfig.ps1

Function Get-ServiceDscConfig
{
    <#
      .SYNOPSIS

      Generates a Service configuration for DSC based on the local system.
      
      .EXAMPLE

      Get-ServiceDscConfig

      .EXAMPLE

      Get-ServiceDscConfig -FilePath D:\SomeFolder\

      .EXAMPLE

      Get-ServiceDscConfig -FilePath D:\SomeFolder\ -Width 100

    #>
    [CmdletBinding()]
    param(
        [parameter(Mandatory=$false)]
        [ValidateScript({Test-Path -Path $_ -PathType Container})]
        [String]
        # Folder to save new .ps1 file
        $Folder = (Get-Location).Path
        ,
        [parameter(Mandatory=$false)]
        [ValidateRange(20,300)]
        [Int]
        # Description text width
        $Width = 100
    )

    $DestFile = Join-Path -Path $Folder -ChildPath "$($env:COMPUTERNAME)-ServiceDscConfig.ps1"

$FileContents1 = @"
Configuration DscServices
{
    # Generated: $(Get-Date) on $($env:COMPUTERNAME)

    Import-DscResource -Module PSDscResources -Name Service

    Node $env:COMPUTERNAME
    {
"@

    Out-File -FilePath $DestFile -InputObject $FileContents1 -Encoding ASCII -Force

    $Services = Get-WmiObject Win32_Service | Sort-Object DisplayName

    foreach($Service in $Services)
    {
        $ServiceDscName     = $Service.Name
        $ServiceDescription = $Service.Description
	$ServiceStart       = $Service.StartMode
        $ServiceState       = 'Ignore'
	
	if($ServiceStart.ToLower() -eq 'auto')
	{
	    $ServiceStart = 'Automatic'
	}
	
        # Ensure ServiceDscName meets ^[A-Za-z0-9_]{1,50}$
        if($ServiceDscName -notmatch "^[A-Za-z0-9_]{1,50}$")
        {
            $ServiceDscNameArray = $ServiceDscName.ToCharArray()
            $MaxLength           = 50
            $ServiceDscName      = ''

            if($ServiceDscNameArray.Length -lt $MaxLength)
            {
                $MaxLength = $ServiceDscNameArray.Length
            }

            for($i = 0; $i -lt $MaxLength; $i++)
            {
                if($ServiceDscNameArray[$i] -match "^[a-zA-Z0-9_]{1}$")
                {
                    $ServiceDscName += $ServiceDscNameArray[$i]

                } else {
                    
                    # replace character with underscore
                    $ServiceDscName += '_'
                }
            }
        }

        # ServiceState should only be Stopped when StartMode=Disabled
        # since not all services continuously run.
        if($Service.StartMode -eq 'Disabled')
        {
            $ServiceState = 'Stopped'
        }

        # Format service description width
        if($ServiceDescription.Length -gt $Width)
        {
            $Indent             = '                          '
            $ServiceDescription = ''
            $WordArray          = $Service.Description.Split(' ')
            $SpaceLeft          = $Width
 
            foreach($word in $WordArray)
            {
	            if($($word.Length + 1) -gt $SpaceLeft)
                {
		            $ServiceDescription += "`n$Indent$word "
		            $SpaceLeft           = $Width - $($word.Length + 1)

	            } else {

		            $ServiceDescription += "$word "
		            $SpaceLeft          -= $($word.Length + 1)
	            }
            }
        }

$Entry = @"
        Service $($ServiceDscName)
        {
            <#
            DisplayName = $($Service.DisplayName)
            Description = $($ServiceDescription)
            Path        = $($Service.PathName)
            ServiceType = $($Service.ServiceType)
            Account     = $($Service.StartName)
            #>
            Name        = '$($Service.Name)'
            StartupType = '$($ServiceStart)'
            State       = '$($ServiceState)'
        }
"@

        Out-File -FilePath $DestFile -InputObject $Entry -Encoding ASCII -Append
    }

    $FileContents2 = @'
    }
}

DscServices -Verbose

'@

    Out-File -FilePath $DestFile -InputObject $FileContents2 -Encoding ASCII -Append

    Write-Output "`nFile written to: $DestFile`n"

} # End Function Get-ServiceDscConfig