modules/Libraries/Get-AzDoVariableGroups.psm1

<#
 
.SYNOPSIS
Get all variables in a specific Azure DevOps libary
 
.DESCRIPTION
The command will retreive all variables to the specificed library
 
.PARAMETER VariableGroupName
The name of the variable group to retrieve
 
.PARAMETER ApiVersion
Allows for specifying a specific version of the api to use (default is 5.0)
 
.EXAMPLE
Get-AzDoVariableGroups
 
.NOTES
 
.LINK
https://github.com/ravensorb/Posh-AzureDevOps
 
#>

function Get-AzDoVariableGroups()
{
    [CmdletBinding(
        DefaultParameterSetName="Name"
    )]
    param
    (
        # Common Parameters
        [PoshAzDo.AzDoConnectObject][parameter(ValueFromPipelinebyPropertyName = $true, ValueFromPipeline = $true)]$AzDoConnection,
        [string]$ApiVersion = $global:AzDoApiVersion

        # Module Parameters
    )
    BEGIN
    {
        if (-not $PSBoundParameters.ContainsKey('Verbose'))
        {
            $VerbosePreference = $PSCmdlet.GetVariableValue('VerbosePreference')
        }  

        $errorPreference = 'Stop'
        if ( $PSBoundParameters.ContainsKey('ErrorAction')) {
            $errorPreference = $PSBoundParameters['ErrorAction']
        }
    
        if (-Not (Test-Path variable:ApiVersion)) { $ApiVersion = "5.0-preview.1" }
        if (-Not $ApiVersion.Contains("preview")) { $ApiVersion = "5.0-preview.1" }

        if (-Not (Test-Path varaible:$AzDoConnection) -and $AzDoConnection -eq $null)
        {
            $AzDoConnection = Get-AzDoActiveConnection

            if ($AzDoConnection -eq $null) { Write-Error -ErrorAction $errorPreference -Message "AzDoConnection or ProjectUrl must be valid" }
        }

        Write-Verbose "Entering script $($MyInvocation.MyCommand.Name)"
        Write-Verbose "Parameter Values"
        $PSBoundParameters.Keys | ForEach-Object { Write-Verbose "$_ = '$($PSBoundParameters[$_])'" }

    }
    PROCESS
    {
        $apiUrl = Get-AzDoApiUrl -RootPath $($AzDoConnection.ProjectUrl) -ApiVersion $ApiVersion -BaseApiPath "/_apis/distributedtask/variablegroups"

        $variableGroups = Invoke-RestMethod $apiUrl -Headers $AzDoConnection.HttpHeaders
        
        Write-Verbose "---------Varaible Groups---------"
        Write-Verbose $variableGroups
        Write-Verbose "---------Varaible Groups---------"

        $variableGroups.value    
    }
    END 
    { 
        Write-Verbose "Leaving script $($MyInvocation.MyCommand.Name)"
    }
}