String/Resolve-String.ps1
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function Resolve-String { <# .SYNOPSIS Expands a PowerShell string. .DESCRIPTION Expands (interpolates) a string as if it were an expandable (double-quoted) string in the current PowerShell context. .PARAMETER InputObject The string to expand. .EXAMPLE PS> $MessageTemplate = 'Hello, $name!'; foreach ($name in 'Susie', 'Bobby', 'Johnny') { Resolve-String $MessageTemplate } Hello, Susie! Hello, Bobby! Hello, Johnny! .EXAMPLE PS> Get-ChildItem /Users -Directory -PipelineVariable Path | Select-Object -ExpandProperty Name -PipelineVariable Name | Resolve-String '${Path}/${Name}.log' .EXAMPLE PS> expand $template #> [Alias('expand')] [CmdletBinding(PositionalBinding)] [SuppressMessage('PSAvoidAssignmentToAutomaticVariable', '', Target = '$_', Justification = 'Cannot create any auxiliary variables due to danger of namespace clash with expandable string contents, which is unavoidably evaluated in the same scope.')] param( [Parameter(Position = 0, ValueFromPipeline)] [ValidateNotNull()] [string] $InputObject ) process { $ExecutionContext.InvokeCommand.ExpandString($InputObject) } } |