DSCResources/ResourceSetHelper.psm1
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# This module should not write any verbose or error messages unless a localization file for it is added $errorActionPreference = 'Stop' Set-StrictMode -Version 'Latest' <# .SYNOPSIS Builds a string of the common parameters shared across all resources in a set. .PARAMETER KeyParameterName The name of the key parameter for the resource. .PARAMETER Parameters The hashtable of all parameters to the resource set (PSBoundParameters). .EXAMPLE $parameters = @{ KeyParameter = @( 'MyKeyParameter1', 'MyKeyParameter2' ) CommonParameter1 = 'CommonValue1' CommonParameter2 = 2 } New-ResourceSetCommonParameterString -KeyParameterName 'KeyParameter' -Parameters $parameters OUTPUT (as string): CommonParameter1 = "CommonValue1"`r`nCommonParameter2 = $CommonParameter2 #> function New-ResourceSetCommonParameterString { [OutputType([String])] [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [String] $KeyParameterName, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [Hashtable] $Parameters ) $stringBuilder = New-Object -TypeName 'System.Text.StringBuilder' foreach ($parameterName in $Parameters.Keys) { # All composite resources have an extra parameter 'InstanceName' if ($parameterName -ine $KeyParameterName -and $parameterName -ine 'InstanceName') { $parameterValue = $Parameters[$parameterName] if ($null -ne $parameterValue) { if ($parameterValue -is [String]) { $null = $stringBuilder.AppendFormat('{0} = "{1}"', $parameterName, $parameterValue) } else { $null = $stringBuilder.Append($parameterName + ' = $' + $parameterName) } $null = $stringBuilder.AppendLine() } } } return $stringBuilder.ToString() } <# .SYNOPSIS Creates a string representing a configuration script for a set of resources. .PARAMETER ResourceName The name of the resource to create a set of. .PARAMETER ModuleName The name of the module to import the resource from. .PARAMETER KeyParameterName The name of the key parameter that will differentiate each resource. .PARAMETER KeyParameterValues An array of the values of the key parameter that will differentiate each resource. .PARAMETER CommonParameterString A string representing the common parameters for each resource. Can be retrieved from New-ResourceSetCommonParameterString. .EXAMPLE New-ResourceSetConfigurationString ` -ResourceName 'xWindowsFeature' ` -ModuleName 'xPSDesiredStateConfiguration' ` -KeyParameterName 'Name' ` -KeyParameterValues @( 'Telnet-Client', 'Web-Server' ) ` -CommonParameterString 'Ensure = "Present"`r`nIncludeAllSubFeature = $true' OUTPUT (as a String): Import-Module -Name xWindowsFeature -ModuleName xPSDesiredStateConfiguration xWindowsFeature Resource0 { Name = "Telnet-Client" Ensure = "Present" IncludeAllSubFeature = $true } xWindowsFeature Resource1 { Name = "Web-Server" Ensure = "Present" IncludeAllSubFeature = $true } #> function New-ResourceSetConfigurationString { [OutputType([String])] [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [String] $ResourceName, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [String] $ModuleName, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [String] $KeyParameterName, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [String[]] $KeyParameterValues, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [String] $CommonParameterString ) $stringBuilder = New-Object -TypeName 'System.Text.StringBuilder' $null = $stringBuilder.AppendFormat('Import-DscResource -Name {0} -ModuleName {1}', $ResourceName, $ModuleName) $null = $stringBuilder.AppendLine() $resourceCount = 0 foreach ($keyParameterValue in $KeyParameterValues) { $null = $stringBuilder.AppendFormat('{0} Resource{1}', $ResourceName, $resourceCount) $null = $stringBuilder.AppendLine() $null = $stringBuilder.AppendLine('{') $null = $stringBuilder.AppendFormat($KeyParameterName + ' = "{0}"', $keyParameterValue) $null = $stringBuilder.AppendLine() $null = $stringBuilder.Append($CommonParameterString) $null = $stringBuilder.AppendLine('}') $resourceCount++ } return $stringBuilder.ToString() } <# .SYNOPSIS Creates a configuration script block for a set of resources. .PARAMETER ResourceName The name of the resource to create a set of. .PARAMETER ModuleName The name of the module to import the resource from. .PARAMETER KeyParameterName The name of the key parameter that will differentiate each resource. .PARAMETER Parameters The hashtable of all parameters to the resource set (PSBoundParameters). .EXAMPLE # From the xGroupSet composite resource $newResourceSetConfigurationParams = @{ ResourceName = 'xGroup' ModuleName = 'xPSDesiredStateConfiguration' KeyParameterName = 'GroupName' CommonParameterNames = @( 'Ensure', 'MembersToInclude', 'MembersToExclude', 'Credential' ) Parameters = $PSBoundParameters } $configurationScriptBlock = New-ResourceSetConfigurationScriptBlock @newResourceSetConfigurationParams .NOTES Only allows one key parameter to be defined for each node. For resources with multiple key parameters, only one key can be different for each resource. See xProcessSet for an example of a resource set with two key parameters. #> function New-ResourceSetConfigurationScriptBlock { [OutputType([ScriptBlock])] [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [String] $ResourceName, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [String] $ModuleName, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [String] $KeyParameterName, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [Hashtable] $Parameters ) $commonParameterString = New-ResourceSetCommonParameterString -KeyParameterName $KeyParameterName -Parameters $Parameters $newResourceSetConfigurationStringParams = @{ ResourceName = $ResourceName ModuleName = $ModuleName KeyParameterName = $KeyParameterName KeyParameterValues = $Parameters[$KeyParameterName] CommonParameterString = $commonParameterString } $resourceString = New-ResourceSetConfigurationString @newResourceSetConfigurationStringParams return [ScriptBlock]::Create($resourceString) } Export-ModuleMember -Function @( 'New-ResourceSetConfigurationScriptBlock' ) |