DSCResources/CommonResourceHelper.psm1
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<#
.SYNOPSIS Tests if the current machine is a Nano server. #> function Test-IsNanoServer { [OutputType([System.Boolean])] [CmdletBinding()] param () $isNanoServer = $false if (Test-CommandExists -Name 'Get-ComputerInfo') { $computerInfo = Get-ComputerInfo $computerIsServer = 'Server' -ieq $computerInfo.OsProductType if ($computerIsServer) { $isNanoServer = 'NanoServer' -ieq $computerInfo.OsServerLevel } } return $isNanoServer } <# .SYNOPSIS Tests whether or not the command with the specified name exists. .PARAMETER Name The name of the command to test for. #> function Test-CommandExists { [OutputType([System.Boolean])] [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $Name ) $command = Get-Command -Name $Name -ErrorAction 'SilentlyContinue' return ($null -ne $command) } <# .SYNOPSIS Creates and throws an invalid argument exception. .PARAMETER Message The message explaining why this error is being thrown. .PARAMETER ArgumentName The name of the invalid argument that is causing this error to be thrown. #> function New-InvalidArgumentException { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $Message, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $ArgumentName ) $argumentException = New-Object -TypeName 'ArgumentException' ` -ArgumentList @($Message, $ArgumentName) $newObjectParams = @{ TypeName = 'System.Management.Automation.ErrorRecord' ArgumentList = @($argumentException, $ArgumentName, 'InvalidArgument', $null) } $errorRecord = New-Object @newObjectParams throw $errorRecord } <# .SYNOPSIS Creates and throws an invalid data exception. .PARAMETER ErrorId The error Id to assign to the exception. .PARAMETER ErrorMessage The error message to assign to the exception. #> function New-InvalidDataException { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [System.String] $ErrorId, [Parameter(Mandatory = $true)] [System.String] $ErrorMessage ) $errorCategory = [System.Management.Automation.ErrorCategory]::InvalidData $exception = New-Object ` -TypeName System.InvalidOperationException ` -ArgumentList $ErrorMessage $errorRecord = New-Object ` -TypeName System.Management.Automation.ErrorRecord ` -ArgumentList $exception, $ErrorId, $errorCategory, $null throw $errorRecord } <# .SYNOPSIS Creates and throws an invalid operation exception. .PARAMETER Message The message explaining why this error is being thrown. .PARAMETER ErrorRecord The error record containing the exception that is causing this terminating error. #> function New-InvalidOperationException { [CmdletBinding()] param ( [Parameter()] [ValidateNotNullOrEmpty()] [System.String] $Message, [Parameter()] [ValidateNotNull()] [System.Management.Automation.ErrorRecord] $ErrorRecord ) if ($null -eq $Message) { $invalidOperationException = New-Object -TypeName 'InvalidOperationException' } elseif ($null -eq $ErrorRecord) { $invalidOperationException = New-Object -TypeName 'InvalidOperationException' ` -ArgumentList @( $Message ) } else { $invalidOperationException = New-Object -TypeName 'InvalidOperationException' ` -ArgumentList @( $Message, $ErrorRecord.Exception ) } $newObjectParams = @{ TypeName = 'System.Management.Automation.ErrorRecord' ArgumentList = @( $invalidOperationException.ToString(), 'MachineStateIncorrect', 'InvalidOperation', $null ) } $errorRecordToThrow = New-Object @newObjectParams throw $errorRecordToThrow } <# .SYNOPSIS Retrieves the localized string data based on the machine's culture. Falls back to en-US strings if the machine's culture is not supported. .PARAMETER ResourceName The name of the resource as it appears before '.strings.psd1' of the localized string file. For example: For xWindowsOptionalFeature: MSFT_xWindowsOptionalFeature For xService: MSFT_xServiceResource For xRegistry: MSFT_xRegistryResource #> function Get-LocalizedData { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $ResourceName ) $resourceDirectory = Join-Path -Path $PSScriptRoot -ChildPath $ResourceName $localizedStringFileLocation = Join-Path -Path $resourceDirectory -ChildPath $PSUICulture if (-not (Test-Path -Path $localizedStringFileLocation)) { # Fallback to en-US $localizedStringFileLocation = Join-Path -Path $resourceDirectory -ChildPath 'en-US' } Import-LocalizedData ` -BindingVariable 'localizedData' ` -FileName "$ResourceName.strings.psd1" ` -BaseDirectory $localizedStringFileLocation return $localizedData } <# .SYNOPSIS Sets the Global DSCMachineStatus variable to a value of 1. #> function Set-DSCMachineRebootRequired { # Suppressing this rule because $global:DSCMachineStatus is used to trigger a reboot. [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidGlobalVars', '')] <# Suppressing this rule because $global:DSCMachineStatus is only set, never used (by design of Desired State Configuration). #> [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')] [CmdletBinding()] param ( ) $global:DSCMachineStatus = 1 } Export-ModuleMember -Function @( 'Test-IsNanoServer', 'New-InvalidArgumentException', 'New-InvalidDataException', 'New-InvalidOperationException', 'Get-LocalizedData', 'Set-DSCMachineRebootRequired' ) |