Lability

0.15.0

Src/Private/Get-DscResourceModule.ps1

                                function Get-DscResourceModule {

<#

    .SYNOPSIS

        Enumerates a directory path and returns list of all valid DSC resources.

    .DESCRIPTION

        The Get-DscResourceModule returns all the PowerShell DSC resource modules in the specified path. This is used to

        determine which directories to copy to a VM's VHD(X) file. Only the latest version of module that is installed

        is returned, removing any versioned folders that are introduced in WMF 5.0, but cannot be interpreted by

        down-level WMF versions.

    .NOTES

        THIS METHOD IS DEPRECATED IN FAVOUR OF THE NEW MODULE CACHE FUNCTIONALITY

        More context can be found here https://github.com/VirtualEngine/Lab/issues/25

#>

    [CmdletBinding()]

    [OutputType([System.Boolean])]

    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingEmptyCatchBlock','')]

    param (

        [Parameter(Mandatory, ValueFromPipeline)]

        [System.String[]] $Path

    )

    process {

        foreach ($basePath in $Path) {

            Get-ChildItem -Path $basePath -Directory | ForEach-Object {

                $moduleInfo = $PSItem;

                ## Check to see if we have a MOF or class resource in the module

                if (Test-DscResourceModule -Path $moduleInfo.FullName -ModuleName $moduleInfo.Name) {

                    Write-Debug -Message ('Discovered DSC resource ''{0}''.' -f $moduleInfo.FullName);

                    $testModuleManifestPath = '{0}\{1}.psd1' -f $moduleInfo.FullName, $moduleInfo.Name;

                    ## Convert the .psd1 file into a hashtable (Test-ModuleManifest can actually load the module)

                    if (Test-Path -Path $testModuleManifestPath -PathType Leaf) {

                        $module = ConvertTo-ConfigurationData -ConfigurationData $testModuleManifestPath;

                        Write-Output -InputObject ([PSCustomObject] @{

                            ModuleName = $moduleInfo.Name;

                            ModuleVersion = $module.ModuleVersion -as [System.Version];

                            Path = $moduleInfo.FullName;

                        });

                    }

                }

                else {

                    ## Enumerate each module\<number>.<number> subdirectory

                    Get-ChildItem -Path $moduleInfo.FullName -Directory | Where-Object Name -match '^\d+\.\d+' | ForEach-Object {

                        Write-Debug -Message ('Checking module versioned directory ''{0}''.' -f $PSItem.FullName);

                        ## Test to see if it's a DSC resource module

                        if (Test-DscResourceModule -Path $PSItem.FullName -ModuleName $moduleInfo.Name) {

                            try {

                                Write-Debug -Message ('Discovered DSC resource ''{0}''.' -f  $PSItem.FullName);

                                $testModuleManifestPath = '{0}\{1}.psd1' -f  $PSItem.FullName, $moduleInfo.Name;

                                ## Convert the .psd1 file into a hashtable (Test-ModuleManifest can actually load the module)

                                $module = ConvertTo-ConfigurationData -ConfigurationData $testModuleManifestPath;

                                Write-Output -InputObject ([PSCustomObject] @{

                                    ModuleName =  $moduleInfo.Name;

                                    ModuleVersion = [System.Version] $module.ModuleVersion;

                                    Path = $PSItem.FullName;

                                });

                            }

                            catch { }

                        }

                    } | #end foreach module\<number>.<number> sub directory

                        Sort-Object -Property ModuleVersion -Descending | Select-Object -First 1;

                }

            } #end foreach module directory

        } #end foreach path

    } #end process

} #end function

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