Modules/DSCParser.psm1
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function ConvertTo-DSCObject { [CmdletBinding(DefaultParameterSetName = 'Path')] param ( [Parameter(Mandatory = $true, ParameterSetName = 'Path')] [ValidateScript({ if (-Not ($_ | Test-Path) ) { throw "File or folder does not exist" } if (-Not ($_ | Test-Path -PathType Leaf) ) { throw "The Path argument must be a file. Folder paths are not allowed." } return $true })] [System.String] $Path, [Parameter(Mandatory = $true, ParameterSetName = 'Content')] [System.String] $Content, [Parameter(ParameterSetName = 'Path')] [Parameter(ParameterSetName = 'Content')] [System.Boolean] $IncludeComments = $false ) #region Variables $ParsedResults = @() #endregion # Define components we wish to filter out $noisyTypes = @( "StatementSeparator", "CommandParameter" if (-not $IncludeComments) { "Comment" } ) $NoisyOperators = (",", "") # Define variable for handling parser errors $ParserErrors = $null # Tokenize the file's content to break it down into its various components; switch ($PsCmdlet.ParameterSetName) { 'Path' { $parsedData = [System.Management.Automation.PSParser]::Tokenize((Get-Content $Path), [ref]$ParserErrors) } 'Content' { $parsedData = [System.Management.Automation.PSParser]::Tokenize($Content, [ref]$ParserErrors) } } # Handle parser errors if ($null -ne $ParserErrors -and $ParserErrors.Count -gt 0) { ForEach ($ParserError in $ParserErrors) { switch ($ParserError.Message) { { $_ -like 'Could not find the module *' -or ` $_ -like 'Multiple versions of the module ''*'' were found*' } { # The corresponding DSC object cannot be found because of a missing or duplicate module. Throw a terminating error Throw ('ConvertTo-DSCObject: "{0}" (line {1}): {2}' -f $ParserError.Token.Content, $ParserError.Token.StartLine, $ParserError.Message) break } default { # unhandled/unknown error. Not sure whether the .token object contains useful content, assuming it does if ($ParserError.Token.Content -ne ".\ConfigurationData.psd1") { Write-Warning ('ConvertTo-DSCObject: "{0}" (line {1}): {2}' -f $ParserError.Token.Content, $ParserError.Token.StartLine, $ParserError.Message) } } } } } [array]$componentsArray = @() $currentValues = @() $nodeKeyWordEncountered = $false $ObjectsToClose = 0 for ($i = 0; $i -lt $parsedData.Count; $i++) { if ($nodeKeyWordEncountered) { if ($parsedData[$i].Type -eq "GroupStart" -or $parsedData[$i].Content -eq '{') { $ObjectsToClose++ } elseif (($parsedData[$i].Type -eq "GroupEnd" -or $parsedData[$i].Content -eq '}') -and $ObjectsToClose -gt 0) { $ObjectsToClose-- } if ($parsedData[$i].Type -notin $noisyTypes -and $parsedData[$i].Content -notin $noisyParts) { $currentValues += $parsedData[$i] if ($parsedData[$i].Type -eq "GroupEnd" -and $parsedData[$i].Content -eq '}' -and $ObjectsToClose -eq 0) { $componentsArray += , $currentValues $currentValues = @() $ObjectsToClose = 0 } } elseif (($parsedData[$i].Type -eq "GroupEnd" -and $parsedData[$i - 2].Content -ne 'parameter' -and $parsedData[$i].Content -ne '}') -or ($parsedData[$i].Type -eq "GroupStart" -and $parsedData[$i - 1].Content -ne 'parameter' -and $parsedData[$i].Content -ne '{')) { $currentValues += $parsedData[$i] } } elseif ($parsedData[$i].Content -eq 'node') { $nodeKeyWordEncountered = $true $newIndexPosition = $i + 1 while ($parsedData[$newIndexPosition].Type -ne 'Keyword' -and $i -lt $parsedData.Count) { $i++ $newIndexPosition = $i + 1 } } } $ParsedResults = $null if ($componentsArray.Count -gt 0) { $ParsedResults = Get-HashtableFromGroup -Groups $componentsArray -Path $Path -IncludeComments:$IncludeComments -NoisyOperators $NoisyOperators } return $ParsedResults } function Get-HashtableFromGroup { [CmdletBinding()] [OutputType([System.Collections.IDictionary[]])] param( [Parameter(Mandatory = $true)] [System.Array] $Groups, [Parameter(Mandatory = $true)] [System.Array] $Path, [Parameter()] [System.Boolean] $IsSubGroup = $false, [Array] $NoisyOperators, [switch] $IncludeComments ) # Loop through all the Resources identified within our configuration $currentIndex = 1 $result = [ordered] @{} $ParsedResults = @() foreach ($group in $Groups) { $keywordFound = $false if (-not $IsSubGroup -and $currentIndex -le $Groups.Count - 2) { Write-Progress -PercentComplete ($currentIndex / ($Groups.Count - 2) * 100) -Activity "Parsing $Path [$($currentIndex)/$($Groups.Count-2)]" } $currentPropertyIndex = 0 $currentProperty = '' while ($currentPropertyIndex -lt $group.Count) { $component = $group[$currentPropertyIndex] if ($component.Type -eq "Keyword" -and -not $keywordFound) { $result = [ordered] @{ ResourceName = $component.Content } $keywordFound = $true # Check to see this is not a CIMInstance (where the next entry is '{') if ($group[$currentPropertyIndex + 1].Content -ne '{') { $currentPropertyIndex++ $result.Add('ResourceInstanceName', $group[$currentPropertyIndex].Content) } } elseif ($keywordFound) { # If the next component is a keyword and we've already identified a keyword for this group, that means that we are # looking at a CIMInstance property; if ($component.Type -eq "Keyword") { $currentGroupEndFound = $false $currentPosition = $currentPropertyIndex + 1 $subGroup = @($component) $ObjectsToClose = 0 $allSubGroups = @() [Array]$subResult = @() while (!$currentGroupEndFound) { $currentSubComponent = $group[$currentPosition] if ($currentSubComponent.Type -eq 'GroupStart' -or $currentSubComponent.Content -eq '{') { $ObjectsToClose++ } elseif ($currentSubComponent.Type -eq 'GroupEnd' -or $currentSubComponent.Content -eq '}') { $ObjectsToClose-- } $subGroup += $group[$currentPosition] if ($ObjectsToClose -eq 0 -and $group[$currentPosition + 1].Type -ne 'Keyword' -and ` $group[$currentPosition].Type -ne 'Keyword') { $currentGroupEndFound = $true } if ($ObjectsToClose -eq 0 -and $group[$currentPosition].Type -ne 'Keyword') { $allSubGroups += , $subGroup $subGroup = @() } $currentPosition++ } $currentPropertyIndex = $currentPosition $subResult = Get-HashtableFromGroup -Groups $allSubGroups -IsSubGroup $true -Path $Path -IncludeComments:$IncludeComments.IsPresent -NoisyOperators $NoisyOperators $subResult[0].Add("CIMInstance", $subResult.ResourceName) $subResult[0].Remove("ResourceName") | Out-Null $allSubGroups = @() $subGroup = @() $result.$currentProperty += $subResult } # If the next component is not an operator, that means that the current member is part of the previous property's # value; elseif ($group[$currentPropertyIndex + 1].Type -ne "Operator" -and $component.Content -ne "=" -and ` $component.Content -ne '{' -and $component.Content -ne '}' -and $group[$currentPropertyIndex + 1].Type -ne 'Keyword') { switch ($component.Type) { { $_ -in @("String", "Number") } { $result.$currentProperty += $component.Content break } { $_ -in @("Variable") } { # Based on the logic if if it's TRUE or FALSE we keep it as a boolean # if it's other type of variable we keep it as a string with added $ character if ($component.Content.ToLower() -eq 'true') { $result.$currentProperty += $true } elseif ($component.Content.ToLower() -eq 'false') { $result.$currentProperty += $false } elseif ($component.Content.ToLower() -eq 'null') { $result.$currentProperty += $null } else { $result.$currentProperty += "`$" + $component.Content } break } { $_ -in @("Member") } { $result.$currentProperty += "." + $component.Content break } { $_ -in @("Command") } { $result.ResourceID += $component.Content break } { $_ -in @("Comment") } { if ($IncludeComments) { $result.$("_metadata_" + $currentProperty) += $component.Content } break } { $_ -in @("GroupStart") } { # Property is an Array $result.$currentProperty = @() do { # we will need to wait till we find end of array rather than terminating the loop early on $currentPropertyIndex++ while ($group[$currentPropertyIndex].Type -eq 'NewLine') { $currentPropertyIndex++ } switch ($group[$currentPropertyIndex].Type) { # Property is an array of string or integer { $_ -in @("String", "Number", "Variable") } { do { $ValueToSet = $group[$currentPropertyIndex].Content if ($group[$currentPropertyIndex].Content -notin $noisyOperators) { $Type = $group[$currentPropertyIndex].Type if ($Type -eq "Variable") { # Based on the logic if if it's TRUE or FALSE we keep it as a boolean # if it's other type of variable we keep it as a string with added $ character if ($ValueToSet.ToLower() -eq 'true') { $ValueToSet = $true } elseif ($ValueToSet.ToLower() -eq 'false') { $ValueToSet = $false } elseif ($ValueToSet.ToLower() -eq 'null') { $ValueToSet = $null } else { $ValueToSet = "`$" + $ValueToSet # Supports variable name escape syntax within arrays Do { $currentPropertyIndex++ $ValueToSet += $group[$CurrentPropertyIndex].Content } until (($group[$CurrentPropertyIndex + 1].Type -eq 'Operator' -and $group[$CurrentPropertyIndex + 1].Content -eq ',') -or $group[$currentPropertyIndex + 1].Type -eq 'GroupEnd') } } $result.$currentProperty += $ValueToSet } $currentPropertyIndex++ } while ($group[$currentPropertyIndex].Type -ne 'GroupEnd') break } # Property is an array of CIMInstance "Keyword" { $CimInstanceComponents = @() $GroupsToClose = 0 $FoundOneGroup = $false do { if ($group[$currentPropertyIndex].Type -eq 'GroupStart') { $FoundOneGroup = $true $GroupsToClose ++ } elseif ($group[$currentPropertyIndex].Type -eq 'GroupEnd') { $GroupsToClose -- } if ($group[$currentPropertyIndex].Content -notin $noisyOperators) { $CimInstanceComponents += $group[$currentPropertyIndex] } $currentPropertyIndex++ } while ($group[$currentPropertyIndex - 1].Type -ne 'GroupEnd' -or $GroupsToClose -ne 0 -or -not $FoundOneGroup) $CimInstanceObject = Convert-CIMInstanceToPSObject -CIMInstance $CimInstanceComponents -NoisyOperators $NoisyOperators $result.$CurrentProperty += $CimInstanceObject break } } } while ($group[$currentPropertyIndex].Type -ne 'GroupEnd' -and $token.Content -ne ')') break } } } elseif ($component.Content -notin $noisyOperators) { switch ($component.Type) { "Member" { $currentProperty = $component.Content.ToString() if (!$result.Contains($currentProperty)) { $result.Add($currentProperty, $null) } } "Variable" { # This is added to handle advanced variables such as $Test.Nested.Variable on 1st level $result.$currentProperty += "`$" + $component.Content Do { $currentPropertyIndex++ $result.$currentProperty += $group[$CurrentPropertyIndex].Content } until ($group[$CurrentPropertyIndex + 1].Type -eq 'NewLine') } } } } $currentPropertyIndex++ } if ($keywordFound) { $ParsedResults += $result } $currentIndex++ } return $ParsedResults } function Convert-CIMInstanceToPSObject { [CmdletBinding()] [OutputType([System.Collections.IDictionary])] Param( [Parameter(Mandatory = $true)] [System.Object[]] $CIMInstance, [Array] $NoisyOperators ) $result = [ordered] @{} $index = 0 $CurrentMemberName = $null while ($index -lt $CimInstance.Count) { $token = $CIMInstance[$index] switch ($token.Type) { # The main token for the CIMInstance "Keyword" { if (-not $result.Contains('CIMInstance')) { $result.Add("CIMInstance", $token.Content) } break } "Member" { if (-not $result.Contains($token.Content)) { $result.Add($token.Content, "") } $CurrentMemberName = $token.Content break } { $_ -in "String", "Number" } { $result.$CurrentMemberName = $token.Content break } { $_ -in @("Variable") } { # Based on the logic if if it's TRUE or FALSE we keep it as a boolean # if it's other type of variable we keep it as a string with added $ character if ($token.Content.ToLower() -eq 'true') { $result.$CurrentMemberName = $true } elseif ($token.Content.ToLower() -eq 'false') { $result.$CurrentMemberName = $false } elseif ($token.Content.ToLower() -eq 'null') { $result.$CurrentMemberName = $null } else { $result.$CurrentMemberName = "`$" + $token.Content # Supports variable name escape syntax within ciminstances Do { $index++ $result.$CurrentMemberName += $CIMInstance[$index].Content } until ($CIMInstance[$index + 1].Type -eq 'NewLine') } break } { $_ -eq "GroupStart" -and $token.Content -eq '@(' } { $result.$CurrentMemberName = @() $index++ while ($CimInstance[$index].Type -eq 'NewLine') { $index++ } switch ($CIMInstance[$index].Type) { { $_ -in "String", "Number", "Variable" } { $arrayContent = @() do { $content = $CIMInstance[$index].Content if ($_ -in @("Variable")) { # Based on the logic if if it's TRUE or FALSE we keep it as a boolean # if it's other type of variable we keep it as a string with added $ character if ($content.ToLower() -eq 'true') { $content = $true } elseif ($content.ToLower() -eq 'false') { $content = $false } elseif ($content.ToLower() -eq 'null') { $content = $null } else { $content = "`$" + $content } } elseif ($_ -in @("String", "Number")) { $content = $content } $arrayContent += $content $index++ } while ($CIMInstance[$index].Type -ne 'GroupEnd') $result.$CurrentMemberName = $arrayContent } # The Content of the Array is yet again CIMInstances. Recursively call into the current method; "Keyword" { while ($CIMInstance[$index].Content -ne ')' -and $CImInstance[$index].Type -ne 'GroupEnd') { $CIMInstanceComponents = @() $GroupsToClose = 0 $FoundOneGroup = $false do { if ($CIMInstance[$index].Type -eq 'GroupStart') { $FoundOneGroup = $true $GroupsToClose ++ } elseif ($CIMInstance[$index].Type -eq 'GroupEnd') { $GroupsToClose -- } if ($CIMInstance[$index].Content -notin $noisyOperators) { $CimInstanceComponents += $CIMInstance[$index] } $index++ } while ($CIMInstance[$index - 1].Type -ne 'GroupEnd' -or $GroupsToClose -ne 0 -or -not $FoundOneGroup) $CimInstanceObject = Convert-CIMInstanceToPSObject -CIMInstance $CimInstanceComponents -NoisyOperators $NoisyOperators $result.$CurrentMemberName += $CimInstanceObject $index++ } } } } } $index++ } return $result } |