Commands/Set-RegEx.ps1
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function Set-RegEx { <# .Synopsis Sets a Regular Expression .Description Sets Regular Expressions to a .regex.txt file .Link Use-RegEx .Example New-RegEx -Name Digits -CharacterClass Digit -Repeat | Set-RegEx #> [CmdletBinding(SupportsShouldProcess=$true)] [OutputType([Nullable])] [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSAvoidUsingCmdletAliases", "", Justification="Irregular Uses Smart Aliases")] param( # The regular expression. [Parameter(Mandatory,Position=0,ValueFromPipelineByPropertyName)] [string] $Pattern, # The name of the regular expression. If not provided, this can be inferred if the pattern starts with a capture [Parameter(Position=1,ValueFromPipelineByPropertyName)] [string] $Name, # The description [Parameter(ValueFromPipelineByPropertyName)] [string] $Description, # The path to the file. If this is not provided, it will save regular expressions to the user's Irregular module path. [Parameter(ValueFromPipelineByPropertyName)] [string] $Path, # If set, will not save the regular expression to disk. Instead, it will alter the in-memory RegEx library. # To use the alias immediately, call Set-RegEx with the . operator (e.g. . Set-Regex -Pattern '\s+' -Name Whitespace -Temporary) [Parameter(ValueFromPipelineByPropertyName)] [switch] $Temporary, # The timeout for the regular expression. # This will only be used if the expression is temporary. # By default, this is 5 seconds [TimeSpan] $TimeOut = '00:00:05', # If set, will output created files or commands. # If using -Temporary, will output the created commands. # Otherwise, will output the created files. [switch] $PassThru ) process { #region Find the Preferred Save Location if (-not $path -and -not $Temporary) { # If haven't been provided a path $modulePaths = # find the preferred path $env:PSModulePath -split $(if ($PSVersionTable.Platform -eq 'Unix') { ':' } else {';' }) $preferredPath = foreach ($mp in $modulePaths) { # It's the first valid module path if ($PSVersionTable.Platform -eq 'Unix' -and $mp -like '/usr/*') { # beneath /usr/ (on Unix) $mp;break } if ($PSVersionTable.Platform -ne 'Unix' -and $mp -like "$env:USERPROFILE*") { # or %userprofile% (on Windows) $mp;break } } if (-not $preferredPath) { return } $path = $preferredPath.TrimEnd([IO.Path]::DirectorySeparatorChar), 'Irregular', 'RegEx' -join [IO.Path]::DirectorySeparatorChar if (-not [IO.Directory]::Exists($Path)) { $path = New-Item -ItemType Directory -Path $path -Force if (-not $path) { return } } } #endregion Find the Preferred Save Location $patternLines = $Pattern -split '(?>\r\n|\n)' $inlineDescription = [Collections.ArrayList]::new() $patternLines = @(foreach ($pl in $patternLines) { if ($pl.Trim().StartsWith('#')) { $inlineDescription.AddRange(@($pl)) } elseif ($pl) { $pl } }) $StartWithCapture = ?<StartsWithCapture> # (?<StartsWithCapture>\A\(\?\<(?<FirstCaptureName>\w+))> $rawPattern = $patternLines -join [Environment]::NewLine if ($rawPattern -match $StartWithCapture -and -not $Name) { $Name = $Matches.FirstCaptureName } if (-not $Name) { Write-Error "Must provide a -Name, or start the pattern with a named capture." -ErrorId Irregular.Missing.Name -Category NotSpecified return } if ($rawPattern -match $StartWithCapture -and $name -eq $Matches.FirstCaptureName) { $removeTheName = ($rawPattern -replace $StartWithCapture, '').Trim().Trim([Environment]::NewLine).Trim() if ($removeTheName.EndsWith(')')) { $removeTheName = $removeTheName.Substring(0, $removeTheName.Length - 1) } $rawPattern = $removeTheName } $descriptionLines = @(foreach ($d in $Description -split '(?>\r\n|\n)') { if ($d -and $d.Trim() -notlike '#*') { "# $d" } else { $d } }) + $inlineDescription $patternFileContent = if ($descriptionLines) { $($descriptionLines -join [Environment]::Newline) + [Environment]::Newline + $rawPattern } else { $rawPattern } if ($Temporary) { # If we didn't have a regex library, create one. if (-not $script:_RegexLibrary) { $script:_RegexLibrary = @{} } $script:_RegexLibrary[$Name] = [Regex]::new("(?<$($Name)> $rawPattern )","IgnoreCase,IgnorePatternWhitespace", '00:00:05.00') $tempModule = New-Module -Name "?<$Name>" -ScriptBlock { Set-Alias "?<$args>" Use-RegEx; Export-ModuleMember -Alias * } -ArgumentList $name | Import-Module -Global -PassThru if (-not $script:_RegexTempModules) { $script:_RegexTempModules = [Collections.Queue]::new() } $script:_RegexTempModules.Enqueue($tempModule) if ($passThru) { $tempModule.ExportedCommands.Values } } else { $semiResolvedPath = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($Path) $path = if ([IO.Directory]::Exists($semiResolvedPath)) { "$semiResolvedPath".TrimEnd([IO.Path]::DirectorySeparatorChar), "$Name.regex.txt" -join [IO.Path]::DirectorySeparatorChar } elseif ($semiResolvedPath -like '*.regex.*') { $semiResolvedPath } if ($Path) { $patternFileContent | Set-Content -Path $path -Force -Encoding UTF8 if ($PassThru) { Get-Item -Path $Path } } } } } |