Invoke-EpsTemplate.ps1
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$ErrorActionPreference = "Stop" function Invoke-EpsTemplate { [CmdletBinding()] [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSAvoidUsingInvokeExpression", "")] Param( [Parameter(ParameterSetName='String template')] [String]$Template, [Parameter(ParameterSetName='File template')] [String]$Path, [Parameter(ValueFromPipeline=$True, ValueFromPipelinebyPropertyName=$True)] [Hashtable]$Binding = @{}, [switch]$Safe ) if ($PSCmdlet.ParameterSetName -eq 'File template') { $Template = [IO.File]::ReadAllText($Path) } $templateScriptBlock = New-EpsTemplateScript -Template $Template Write-Verbose "Executing script @'`n$templateScriptBlock`n'@." if($Safe) { $block = { Param([ScriptBlock]$Script, [Hashtable]$Binding) $Binding.GetEnumerator() | ForEach-Object { New-Variable -Name $_.Key -Value $_.Value } $Script.Invoke() } try { $powershell = [powershell]::Create() $powershell.` AddScript((Get-Content "$PSScriptRoot/Each.ps1" -Raw)).` AddScript($block).` AddParameter("Binding", $Binding).` AddParameter("Script", $templateScriptBlock).` Invoke() } finally { if ($powershell) { $powershell.Dispose() } } } else { if ($templateScriptBlock.psobject.Methods['InvokeWithContext']) { # InvokeWithContext was introduced in PowerShell version 3.0 $variablesToDefine = $Binding.GetEnumerator() | ForEach-Object { New-Object System.Management.Automation.PSVariable @($_.Key, $_.Value) } $templateScriptBlock.InvokeWithContext(@{}, $variablesToDefine) } else { $Binding.GetEnumerator() | ForEach-Object { New-Variable -Name $_.Key -Value $_.Value } $templateScriptBlock.Invoke() } } } |