Compress-RegEx.ps1
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function Compress-Regex { <# .SYNOPSIS Compresses Regular Expressions .DESCRIPTION Compresses a Regular Expression, removing all whitespace and comments. This will make a regular expression much more difficult to read, and a bit shorter. .EXAMPLE New-Regex -Description "This is a description of a regex nobody will care about" | New-Regex -Name Width @( ?<Decimals> ) | New-Regex -Name Height @( ?<Decimals> ) | Compress-Regex #> param( # The regular expression to compress. [Parameter(Mandatory, ValueFromPipeline, ValueFromPipelineByPropertyName, Position=0)] [Alias('RegularExpression','Pattern','Expression')] [Regex] $Regex, # The Match Timeout. # By default, this value will be carried over from the -RegEx. [timespan] $MatchTimeout = '00:00:01' ) process { # Create a new regex from the old: [Regex]::new( ( # To compress the regex, split it by newlines "$Regex" -split '(?>\r\n|\n)' -replace # and strip comments '(?<!\\)#.+$' -join ([Environment]::NewLine) -replace # and strip whitespace. '[\s\n\r]' ), # We'll keep the regex options should remain the same, for now. $Regex.Options, $( # If we provided a -MatchTimeout if ($PSBoundParameters["MatchTimeout"]) { $MatchTimeout # use that } elseif ($Regex.MatchTimeout.TotalSeconds -gt 0) { $Regex.MatchTimeout # otherwise, carry the timeout from the [Regex] } else { $MatchTimeout # and if it didn't have one, use the default for -MatchTimeout. } ) ) } } |