Converts relative paths to absolute paths but does not require the path to exist.

Get-AbsolutePath.ps1

function Get-AbsolutePath {
    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)]
        [string[]]
        $Path
    )
    
    process {
        $Path | ForEach-Object {
            $PSCmdlet.SessionState.Path.GetUnresolvedProviderPathFromPSPath($_)
        }
    }
}