functions/refactor/Set-PSMDParameterHelp.ps1
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function Set-PSMDParameterHelp { <# .SYNOPSIS Sets the content of a CBH parameter help. .DESCRIPTION Sets the content of a CBH parameter help. This command will enumerate all files in the specified folder and subfolders. Then scan all files with extension .ps1 and .psm1. In each of these files it will check out function definitions, see whether the name matches, then update the help for the specified parameter if present. In order for this to work, a few rules must be respected: - It will not work with help XML, only with CBH xml - It will not work if the help block is above the function. It must be placed within. - It will not ADD a CBH, if none is present yet. If there is no help for the specified parameter, it will simply do nothing, but report the fact. .PARAMETER Path The base path where all the files are in. .PARAMETER CommandName The name of the command to update. Uses wildcard matching to match, so you can do a global update using "*" .PARAMETER ParameterName The name of the parameter to update. Must be an exact match, but is not case sensitive. .PARAMETER HelpText The text to insert. - Do not include indents. It will pick up the previous indents and reuse them - Do not include an extra line, it will automatically add a separating line to the next element .PARAMETER DisableCache By default, this command caches the results of its execution in the PSFramework result cache. This information can then be retrieved for the last command to do so by running Get-PSFResultCache. Setting this switch disables the caching of data in the cache. .EXAMPLE Set-PSMDParameterHelp -Path "C:\PowerShell\Projects\MyModule" -CommandName "*" -ParameterName "Foo" -HelpText @" This is some foo text For a truly foo-some result "@ Scans all files in the specified path. - Considers every function found - Will only process the parameter 'Foo' - And replace the current text with the one specified #> [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseShouldProcessForStateChangingFunctions", "")] [CmdletBinding()] Param ( [Parameter(Mandatory = $true)] [string] $Path, [Parameter(Mandatory = $true)] [string] $CommandName, [Parameter(Mandatory = $true)] [string] $ParameterName, [Parameter(Mandatory = $true)] [string] $HelpText, [switch] $DisableCache ) # Global Store for pending file updates # Exempt from Scope Boundary violation rule, since only accessed using dedicated helper function $globalFunctionHash = @{ } #region Utility Functions function Invoke-AstWalk { [CmdletBinding()] Param ( $Ast, [string] $CommandName, [string] $ParameterName, [string] $HelpText ) #Write-PSFMessage -Level Host -Message "Processing $($Ast.Extent.StartLineNumber) | $($Ast.Extent.File) | $($Ast.GetType().FullName)" $typeName = $Ast.GetType().FullName switch ($typeName) { "System.Management.Automation.Language.FunctionDefinitionAst" { if ($Ast.Name -like $CommandName) { Update-CommandParameterHelp -FunctionAst $Ast -ParameterName $ParameterName -HelpText $HelpText if ($Ast.Body.DynamicParamBlock) { Invoke-AstWalk -Ast $Ast.Body.DynamicParamBlock -CommandName $CommandName -ParameterName $ParameterName -HelpText $HelpText } if ($Ast.Body.BeginBlock) { Invoke-AstWalk -Ast $Ast.Body.BeginBlock -CommandName $CommandName -ParameterName $ParameterName -HelpText $HelpText } if ($Ast.Body.ProcessBlock) { Invoke-AstWalk -Ast $Ast.Body.ProcessBlock -CommandName $CommandName -ParameterName $ParameterName -HelpText $HelpText } if ($Ast.Body.EndBlock) { Invoke-AstWalk -Ast $Ast.Body.EndBlock -CommandName $CommandName -ParameterName $ParameterName -HelpText $HelpText } } else { Invoke-AstWalk -Ast $Ast.Body -CommandName $CommandName -ParameterName $ParameterName -HelpText $HelpText } } default { foreach ($property in $Ast.PSObject.Properties) { if ($property.Name -eq "Parent") { continue } if ($null -eq $property.Value) { continue } if (Get-Member -InputObject $property.Value -Name GetEnumerator -MemberType Method) { foreach ($item in $property.Value) { if ($item.PSObject.TypeNames -contains "System.Management.Automation.Language.Ast") { Invoke-AstWalk -Ast $item -CommandName $CommandName -ParameterName $ParameterName -HelpText $HelpText } } continue } if ($property.Value.PSObject.TypeNames -contains "System.Management.Automation.Language.Ast") { Invoke-AstWalk -Ast $property.Value -CommandName $CommandName -ParameterName $ParameterName -HelpText $HelpText } } } } } function Update-CommandParameterHelp { [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseDeclaredVarsMoreThanAssignments", "")] [CmdletBinding()] Param ( [System.Management.Automation.Language.FunctionDefinitionAst] $FunctionAst, [string] $ParameterName, [string] $HelpText ) #region Find the starting position function Get-StartIndex { [OutputType([System.Int32])] [CmdletBinding()] Param ( [System.Management.Automation.Language.FunctionDefinitionAst] $FunctionAst, [string] $ParameterName, [int] $HelpEnd ) if ($HelpEnd -lt 1) { return -1 } $index = -1 $offset = 0 while ($FunctionAst.Extent.Text.SubString(0, $HelpEnd).IndexOf(".PARAMETER $ParameterName", $offset, [System.StringComparison]::InvariantCultureIgnoreCase) -ne -1) { $tempIndex = $FunctionAst.Extent.Text.SubString(0, $HelpEnd).IndexOf(".PARAMETER $ParameterName", $offset, [System.StringComparison]::InvariantCultureIgnoreCase) $endOfLineIndex = $FunctionAst.Extent.Text.SubString(0, $HelpEnd).IndexOf("`n", $tempIndex, [System.StringComparison]::InvariantCultureIgnoreCase) if ($FunctionAst.Extent.Text.SubString($tempIndex, ($endOfLineIndex - $tempIndex)).Trim() -eq ".PARAMETER $ParameterName") { return $tempIndex } $offset = $endOfLineIndex } return $index } $startIndex = $FunctionAst.Extent.StartOffset $endIndex = $FunctionAst.Body.ParamBlock.Extent.StartOffset foreach ($attribute in $FunctionAst.Body.ParamBlock.Attributes) { if ($attribute.Extent.StartOffset -lt $endIndex) { $endIndex = $attribute.Extent.StartOffset } } $index1 = Get-StartIndex -FunctionAst $FunctionAst -ParameterName $ParameterName -HelpEnd ($endIndex - $startIndex) if ($index1 -eq -1) { Write-PSFMessage -Level Warning -Message "Could not find Comment Based Help for parameter '$ParameterName' of command '$($FunctionAst.Name)' in '$($FunctionAst.Extent.File)'" -Tag 'cbh', 'fail' -FunctionName Rename-PSMDParameter Write-Issue -Extent $FunctionAst.Extent -Type "ParameterCBHNotFound" -Data "Parameter Help not found" return } $index2 = $FunctionAst.Extent.Text.SubString(0, ($endIndex - $startIndex)).IndexOf("$ParameterName", $index1, [System.StringComparison]::InvariantCultureIgnoreCase) + $ParameterName.Length $goodIndex = $FunctionAst.Extent.Text.SubString($index2).IndexOf("`n") + 1 + $index2 #endregion Find the starting position #region Find the ending position $lines = $FunctionAst.Extent.Text.SubString(0, ($endIndex - $startIndex)).Substring($goodIndex).Split("`n") $goodLines = @() $badLine = "" foreach ($line in $lines) { if ($line -notmatch "^#{0,1}[\s`t]{0,}\.|^#>") { $goodLines += $line } else { $badLine = $line break } } if (($goodLines.Count -eq 0) -or ($goodLines.Count -eq $lines.Count)) { Write-PSFMessage -Level Warning -Message "Could not parse the Comment Based Help for parameter '$ParameterName' of command '$($FunctionAst.Name)' in '$($FunctionAst.Extent.File)'" -Tag 'cbh', 'fail' -FunctionName Rename-PSMDParameter Write-Issue -Extent $FunctionAst.Extent -Type "ParameterCBHBroken" -Data "Parameter Help cannot be parsed" return } $badIndex = $FunctionAst.Extent.Text.SubString(0, ($endIndex - $startIndex)).IndexOf($badLine, $index2) - 1 #endregion Find the ending position #region Find the indent and create the text to insert $indents = @() foreach ($line in $goodLines) { if ($line.Trim(" ^t#$([char]13)").Length -gt 0) { $line | Select-String "^(#{0,1}[\s`t]+)" | ForEach-Object { $indents += $_.Matches[0].Groups[1].Value } } } if ($indents.Count -eq 0) { $indent = "`t`t" } else { $indent = $indents | Sort-Object -Property Length | Select-Object -First 1 } $indent = $indent.Replace([char]13, [char]9) $newHelpText = ($HelpText.Split("`n") | ForEach-Object { "$($indent)$($_)" }) -join "`n" $newHelpText += "`n$($indent)" #endregion Find the indent and create the text to insert Add-FileReplacement -Path $FunctionAst.Extent.File -Start ($goodIndex + $startIndex) -Length ($badIndex - $goodIndex) -NewContent $newHelpText } function Add-FileReplacement { [CmdletBinding()] Param ( [string] $Path, [int] $Start, [int] $Length, [string] $NewContent ) Write-PSFMessage -Level Verbose -Message "Change Submitted: $Path | $Start | $Length | $NewContent" -Tag 'update', 'change', 'file' if (-not $globalFunctionHash.ContainsKey($Path)) { $globalFunctionHash[$Path] = @() } $globalFunctionHash[$Path] += New-Object PSObject -Property @{ Content = $NewContent Start = $Start Length = $Length } } function Apply-FileReplacement { [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseApprovedVerbs", "")] [CmdletBinding()] Param ( ) foreach ($key in $globalFunctionHash.Keys) { $value = $globalFunctionHash[$key] | Sort-Object Start $content = [System.IO.File]::ReadAllText($key) $newString = "" $currentIndex = 0 foreach ($item in $value) { $newString += $content.SubString($currentIndex, ($item.Start - $currentIndex)) $newString += $item.Content $currentIndex = $item.Start + $item.Length } $newString += $content.SubString($currentIndex) [System.IO.File]::WriteAllText($key, $newString) #$newString } } function Write-Issue { [CmdletBinding()] Param ( $Extent, $Data, [string] $Type ) New-Object PSObject -Property @{ Type = $Type Data = $Data File = $Extent.File StartLine = $Extent.StartLineNumber Text = $Extent.Text } } #endregion Utility Functions $files = Get-ChildItem -Path $Path -Recurse | Where-Object Extension -Match "\.ps1|\.psm1" $issues = @() foreach ($file in $files) { $tokens = $null $parsingError = $null $ast = [System.Management.Automation.Language.Parser]::ParseFile($file.FullName, [ref]$tokens, [ref]$parsingError) Write-PSFMessage -Level VeryVerbose -Message "Updating help for <c='sub'>$CommandName / $ParameterName</c> | Scanning $($file.FullName)" -Tag 'start' -Target $Name $issues += Invoke-AstWalk -Ast $ast -CommandName $CommandName -ParameterName $ParameterName -HelpText $HelpText } Set-PSFResultCache -InputObject $issues -DisableCache $DisableCache Apply-FileReplacement $issues } |