Lability

0.15.0

Src/Private/Start-DscConfigurationCompilation.ps1

                                function Start-DscConfigurationCompilation {

<#

    .SYNOPSIS

        Compiles an individual DSC configuration as a job.

#>

    [CmdletBinding()]

    [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions','')]

    [OutputType([System.IO.FileInfo])]

    param (

        ## DSC configuration file path, e.g. CONTROLLER.ps1

        [Parameter(Mandatory)]

        [System.String] $Configuration,

        ## Parameters to pass into the DSC configuration

        [Parameter(Mandatory)]

        [System.Collections.Hashtable] $ConfigurationParameters,

        [Parameter()]

        [System.Management.Automation.SwitchParameter] $AsJob

    )

    begin {

        ## Compilation scriptblock started as a job

        $compileConfigurationScriptBlock = {

            param (

                ## DSC configuration path, e.g. CONTROLLER.ps1

                [Parameter(Mandatory)]

                [System.String] $ConfigurationPath,

                ## Parameters to pass into the configuration

                [Parameter()]

                [System.Collections.Hashtable] [ref] $ConfigurationParameters,

                [Parameter()]

                [System.String] $VerbosePreference

            )

            process {

                $ConfigurationPath = Resolve-Path -Path $ConfigurationPath;

                ## TODO Configuration name must currently match configuration file name

                $configurationName = (Get-Item -Path $ConfigurationPath).BaseName;

                ## Internal functions and localization strings are in a different PowerShell.exe

                ## process so we have to resort to hard coding (for the time being) :(

                Write-Verbose -Message ("Loading configuration '{0}'." -f $ConfigurationPath);

                $existingVerbosePreference = $VerbosePreference;

                ## Hide verbose output

                $VerbosePreference = 'SilentlyContinue';

                ## Import the configuration

                . $ConfigurationPath;

                $VerbosePreference = $existingVerbosePreference;

                Write-Verbose -Message ("Compiling configuration '{0}'." -f $ConfigurationPath);

                $VerbosePreference = 'SilentlyContinue';

                if ($ConfigurationParameters) {

                    ## Call the configuration (complile it) with supplied parameters

                    & $configurationName @ConfigurationParameters;

                }

                else {

                    ## Just call the configuration (compile it)

                    & $configurationName;

                }

                ## Restore verbose preference

                $VerbosePreference = $existingVerbosePreference;

            } #end process

        } #end $compileConfigurationScriptBlock

    }

    process {

        $configurationPath = Resolve-Path -Path $Configuration;

        $startJobParams = @{

            Name = $configurationPath;

            ScriptBlock = $compileConfigurationScriptBlock;

        }

        if ($PSBoundParameters.ContainsKey('ConfigurationParameters')) {

            $startJobParams['ArgumentList'] = @($configurationPath, $ConfigurationParameters, $VerbosePreference);

        }

        $job = Start-Job @startJobParams;

        $activity = $localized.CompilingConfiguration;

        if (-not $AsJob) {

            while ($Job.HasMoreData -or $Job.State -eq 'Running') {

                $percentComplete++;

                if ($percentComplete -gt 100) {

                    $percentComplete = 0;

                }

                Write-Progress -Id $job.Id -Activity $activity -Status $configurationPath -PercentComplete $percentComplete;

                Receive-Job -Job $Job

                Start-Sleep -Milliseconds 500;

            }

            Write-Progress -Id $job.Id -Activity $activity -Completed;

            $job | Receive-Job;

        }

        else {

            return $job;

        }

    } #end process

} #end function

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# SIG # End signature block