lib/dynamic.ps1
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using namespace System.Reflection using namespace System.Reflection.Emit using namespace System.Management.Automation using namespace System.Collections.ObjectModel using namespace System.Runtime.InteropServices function Get-DynBuilder { end { ($pmb = $ExecutionContext.SessionState.PSVariable.Get('PwshDynBuilder').Value) ? $pmb : $( Set-Variable -Name PwshDynBuilder -Value ($pmb = ([AssemblyBuilder]::DefineDynamicAssembly( [AssemblyName]::new('PwshDynBuilder'), [AssemblyBuilderAccess]::Run )).DefineDynamicModule('PwshDynBuilder')) -Option Constant -Scope Global -Visibility Private $pmb ) } } function New-DynParameter { [CmdletBinding()] param( [Parameter(Mandatory)] [ValidateNotNullOrEmpty()] [Hashtable[]]$Parameter ) end { $dict = [RuntimeDefinedParameterDictionary]::new() $Parameter.ForEach{ if ($_.GetType().Name -ne 'Hashtable' -or !$_.Count) { throw [ArgumentException]::new('Invalid argument.') } $attr = [Collection[Attribute]]::new() $attr.Add((New-Object Management.Automation.ParameterAttribute -Property @{ ParameterSetName = $_.ParameterSetName # __AllParameterSets by default Mandatory = $_.Mandatory Position = $_.Position -ge 0 ? $_.Position : 0x80000000 ValueFromPipeline = $_.ValueFromPipeline ValueFromPipelineByPropertyName = $_.ValueFromPipelineByPropertyName })) if ($_.ValidateNotNullOrEmpty) { $attr.Add([ValidateNotNullOrEmptyAttribute]::new()) } if ($_.ValidateScript) { $attr.Add((New-Object Management.Automation.ValidateScriptAttribute($_.ValidateScript))) } if ($_.ValidateSet) { $attr.Add((New-Object Management.Automation.ValidateSetAttribute($_.ValidateSet))) } $dict.Add($_.Name, (New-Object Management.Automation.RuntimeDefinedParameter( $_.Name, $_.Type, $attr) -Property @{ Value = $_.Value # this makes it easy to call dynamic parameters } -OutVariable "script:param$($_.Name)" # example: $param(Name) )) } $dict } } |