Serialize a TFS 2012 Build Definition as XML to be version controlled

Convert-TfsBuildDefinitionToXml.ps1

[CmdletBinding()]
param (
    $CollectionUri,
    $ProjectName
)

Set-StrictMode -Version Latest
$ErrorActionPreference = 'Stop'

Add-Type -AssemblyName 'Microsoft.TeamFoundation, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
Add-Type -AssemblyName 'Microsoft.TeamFoundation.Client, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
Add-Type -AssemblyName 'Microsoft.TeamFoundation.Build.Client, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'

# consider scanning HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v2.0.50727\AssemblyFoldersEx\Visual Studio v11.0 Reference Assemblies
#Add-Type -AssemblyName 'Microsoft.TeamFoundation.Build.Workflow, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
Add-Type -Path 'C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\ReferenceAssemblies\v2.0\Microsoft.TeamFoundation.Build.Workflow.dll'



$Collection = [Microsoft.TeamFoundation.Client.TfsTeamProjectCollectionFactory]::GetTeamProjectCollection($CollectionUri)

$BuildServer = $Collection.GetService([Microsoft.TeamFoundation.Build.Client.IBuildServer])

$Definitions = $BuildServer.QueryBuildDefinitions($ProjectName)

$Def = $Definitions | ? { $_.queuestatus -eq 'enabled' } | select -skip 3 -First 1

function Convert-BuildDefinitionToXml {
    [CmdletBinding()]
    param (
        [Microsoft.TeamFoundation.Build.Client.IBuildDefinition]
        $Definition,
        [string]
        $CollectionUri
    )
    
    $x = [xml]'<BuildDefinition />'
    
    # TODO build def uri, collection uri, team project name?
    $x.DocumentElement.AppendChild($x.CreateElement('Uri')).InnerText = $Definition.Uri
    $x.DocumentElement.AppendChild($x.CreateElement('Id')).InnerText = $Definition.Id
    $x.DocumentElement.AppendChild($x.CreateElement('TeamProject')).InnerText = $Definition.TeamProject
    $x.DocumentElement.AppendChild($x.CreateElement('CollectionUri')).InnerText = $CollectionUri


    # general
    $x.DocumentElement.AppendChild($x.CreateElement('Name')).InnerText = $Definition.Name
    $x.DocumentElement.AppendChild($x.CreateElement('Description')).InnerText = $Definition.Description
    $x.DocumentElement.AppendChild($x.CreateElement('QueueStatus')).InnerText = $Definition.QueueStatus
    
    # trigger
    $triggerX = $x.DocumentElement.AppendChild($x.CreateElement('Trigger'))
    $triggerX.AppendChild($x.CreateElement('TriggerType')).InnerText = $Definition.TriggerType
    $triggerX.AppendChild($x.CreateElement('ContinuousIntegrationType')).InnerText = $Definition.ContinuousIntegrationType
    $triggerX.AppendChild($x.CreateElement('ContinuousIntegrationQuietPeriodMinutes')).InnerText = $Definition.ContinuousIntegrationQuietPeriod
    $triggerX.AppendChild($x.CreateElement('BatchSize')).InnerText = $Definition.BatchSize
    foreach ($Schedule in $Definition.Schedules) {
        $scheduleX = $triggerX.AppendChild($x.CreateElement('Schedule'))
        $scheduleX.AppendChild($x.CreateElement('DaysToBuild')).InnerText = $Schedule.DaysToBuild
        $scheduleX.AppendChild($x.CreateElement('StartTimeSecondsPastMidnight')).InnerText = $Schedule.StartTime
        $scheduleX.AppendChild($x.CreateElement('TimeZone')).InnerText = $Schedule.TimeZone
        $scheduleX.AppendChild($x.CreateElement('Type')).InnerText = $Schedule.Type
        # TODO serialize TimeZoneInfo as culture-invariant
    }

    #workspace
    # TODO optional path translation
    $workspaceX = $x.DocumentElement.AppendChild($x.CreateElement('Workspace'))
    foreach ($Mapping in $Definition.Workspace.Mappings) {
        $mappingX = $workspaceX.AppendChild($x.CreateElement('Mapping'))
        $mappingX.AppendChild($x.CreateElement('MappingType')).InnerText = $Mapping.MappingType
        $mappingX.AppendChild($x.CreateElement('ServerItem')).InnerText = $Mapping.ServerItem
        $mappingX.AppendChild($x.CreateElement('LocalItem')).InnerText = $Mapping.LocalItem
        $mappingX.AppendChild($x.CreateElement('Depth')).InnerText = $Mapping.Depth
    }

    #build defaults
    $controllerX = $x.DocumentElement.AppendChild($x.CreateElement('BuildController'))
    $controllerX.AppendChild($x.CreateElement('BuildControllerUri')).InnerText = $Definition.BuildControllerUri
    $controllerX.AppendChild($x.CreateElement('Name')).InnerText = $Definition.BuildController.Name
    $controllerX.AppendChild($x.CreateElement('Description')).InnerText = $Definition.BuildController.Description
    $controllerX.AppendChild($x.CreateElement('CustomAssemblyPath')).InnerText = $Definition.BuildController.CustomAssemblyPath
    $x.DocumentElement.AppendChild($x.CreateElement('DefaultDropLocation')).InnerText = $Definition.DefaultDropLocation

    # process
    $processX = $x.DocumentElement.AppendChild($x.CreateElement('Process'))
    $processX.AppendChild($x.CreateElement('Id')).InnerText = $Definition.Process.Id
    $processX.AppendChild($x.CreateElement('Description')).InnerText = $Definition.Process.Description
    $processX.AppendChild($x.CreateElement('ServerPath')).InnerText = $Definition.Process.ServerPath
    $processX.AppendChild($x.CreateElement('SupportedReasons')).InnerText = $Definition.Process.SupportedReasons
    $processX.AppendChild($x.CreateElement('TeamProject')).InnerText = $Definition.Process.TeamProject
    $processX.AppendChild($x.CreateElement('TemplateType')).InnerText = $Definition.Process.TemplateType
    $processX.AppendChild($x.CreateElement('Version')).InnerText = $Definition.Process.Version

    # TODO use WorkflowHelpers.DeserializeProcessParameters to translate paths but serialize as-is
    $parametersX = $x.DocumentElement.AppendChild($x.CreateElement('ProcessParameters'))
    [void]$parametersX.AppendChild( $x.CreateCDataSection( $Definition.ProcessParameters) ) # TODO escape ]] in parameters

<#
    $Dictionary = [Microsoft.TeamFoundation.Build.Workflow.WorkflowHelpers]::DeserializeProcessParameters($Definition.ProcessParameters)

#>

    # retention policy
    $policyListX = $x.DocumentElement.AppendChild($x.CreateElement('RetentionPolicyList'))
    foreach ($Policy in $Definition.RetentionPolicyList) {
        $policyX = $policyListX.AppendChild($x.CreateElement('RetentionPolicy'))
        $policyX.AppendChild($x.CreateElement('BuildReason')).InnerText = $Policy.BuildReason
        $policyX.AppendChild($x.CreateElement('BuildStatus')).InnerText = $Policy.BuildStatus
        $policyX.AppendChild($x.CreateElement('DeleteOptions')).InnerText = $Policy.DeleteOptions
        $policyX.AppendChild($x.CreateElement('NumberToKeep')).InnerText = $Policy.NumberToKeep
    }

    # TODO attached properties at the various levels of the hierarchy?


    return ,$x

}

$buildxml = Convert-BuildDefinitionToXml -Definition $Def -CollectionUri $CollectionUri
$buildxml.Save('c:\temp\build.xml')
gc 'c:\temp\build.xml'

Curious, would you expect this to work with TFS 2010 if the assemblies to load for Add-Type were changed to version '10.0.0.0' (and the -Path changed to 10.0 folder)?