Tasks/Set-WhiskeyVariableFromXml.ps1
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function Set-WhiskeyVariableFromXml { [Whiskey.Task("SetVariableFromXml")] [CmdletBinding()] param( [Parameter(Mandatory=$true)] [Whiskey.Context] $TaskContext, [Parameter(Mandatory=$true)] [hashtable] $TaskParameter ) Set-StrictMode -Version 'Latest' Use-CallerPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState $path = $TaskParameter['Path'] | Resolve-WhiskeyTaskPath -TaskContext $TaskContext -PropertyName 'Path' -PathType File if( ($path | Measure-Object).Count -ne 1 ) { Stop-WhiskeyTask -TaskContext $TaskContext -PropertyName 'Path' -Message ('resolves to multiple files. The "Path" property must only resolve to one file.') return } Write-WhiskeyVerbose -Context $TaskContext -Message ($path) [xml]$xml = $null try { $xml = Get-Content -Path $path -Raw } catch { $Global:Error.RemoveAt(0) Stop-WhiskeyTask -TaskContext $TaskContext -Message ('Exception reading XML from file "{0}": {1}"' -f $path,$_) return } $nsManager = New-Object -TypeName 'Xml.XmlNamespaceManager' -ArgumentList $xml.NameTable $prefixes = $TaskParameter['NamespacePrefixes'] if( $prefixes -and ($prefixes | Get-Member 'Keys') ) { foreach( $prefix in $prefixes.Keys ) { $nsManager.AddNamespace($prefix, $prefixes[$prefix]) } } $allowMissingNodes = $TaskParameter['AllowMissingNodes'] | ConvertFrom-WhiskeyYamlScalar $variables = $TaskParameter['Variables'] if( $variables -and ($variables | Get-Member 'Keys') ) { foreach( $variableName in $variables.Keys ) { $xpath = $variables[$variableName] $value = $xml.SelectNodes($xpath, $nsManager) | ForEach-Object { if( $_ | Get-Member 'InnerText' ) { $_.InnerText } elseif( $_ | Get-Member '#text' ) { $_.'#text' } } $exists = ' ' if( $value -eq $null ) { if( -not $allowMissingNodes ) { Stop-WhiskeyTask -TaskContext $TaskContext -Message ('Variable {0}: XPath expression "{1}" matched no elements/attributes in XML file "{2}".' -f $variableName,$xpath,$path) return } $value = '' $exists = '!' } Write-WhiskeyVerbose -Context $TaskContext -Message (' {0} {1}' -f $exists,$xpath) Write-WhiskeyVerbose -Context $TaskContext -Message (' {0} = {1}' -f $variableName,($value | Select-Object -First 1)) $value | Select-Object -Skip 1 | ForEach-Object { Write-WhiskeyVerbose -Context $TaskContext -Message (' {0} {1}' -f (' ' * $variableName.Length),$_) } Add-WhiskeyVariable -Context $TaskContext -Name $variableName -Value $value } } } |