functions/Remove-DbaServerRole.ps1

function Remove-DbaServerRole {
    <#
    .SYNOPSIS
        Deletes specified server-level role.
 
    .DESCRIPTION
        Deletes specified server-level role.
 
    .PARAMETER SqlInstance
        The target SQL Server instance or instances.
 
    .PARAMETER SqlCredential
        Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential).
 
        Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported.
 
        For MFA support, please use Connect-DbaInstance.
 
    .PARAMETER ServerRole
        The server-role that will be removed.
 
    .PARAMETER WhatIf
        Shows what would happen if the command were to run. No actions are actually performed.
 
    .PARAMETER Confirm
        Prompts you for confirmation before executing any changing operations within the command.
 
    .PARAMETER EnableException
        By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
        This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
        Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
 
    .PARAMETER InputObject
        Piped server-role objects.
 
    .NOTES
        Tags: ServerRole, Instance, Security
        Author: Claudio Silva (@ClaudioESSilva), https://claudioessilva.com
        Website: https://dbatools.io
        Copyright: (c) 2018 by dbatools, licensed under MIT
        License: MIT https://opensource.org/licenses/MIT
 
    .LINK
        https://dbatools.io/Remove-DbaServerRole
 
    .EXAMPLE
        PS C:\> Remove-DbaServerRole -SqlInstance Server1 -ServerRole 'serverExecuter'
 
        Server-role 'serverExecuter' on Server1 will be removed if it exists.
 
    .EXAMPLE
        PS C:\> Remove-DbaServerRole -SqlInstance Server1 -ServerRole 'serverExecuter' -Confirm:$false
 
        Suppresses all prompts to remove the server-role 'serverExecuter' on 'Server1'.
 
    #>

    [CmdletBinding(DefaultParameterSetName = "Default", SupportsShouldProcess, ConfirmImpact = "High")]
    param (
        [DbaInstanceParameter[]]$SqlInstance,
        [PSCredential]$SqlCredential,
        [string[]]$ServerRole,
        [parameter(ValueFromPipeline)]
        [Microsoft.SqlServer.Management.Smo.ServerRole[]]$InputObject,
        [switch]$EnableException
    )
    process {
        if ($SqlInstance) {
            $InputObject += Get-DbaServerRole -SqlInstance $SqlInstance -SqlCredential $SqlCredential -ServerRole $ServerRole
        }

        foreach ($srvrole in $InputObject) {
            if ($Pscmdlet.ShouldProcess($srvrole.DomainInstanceName, "Dropping the server-role named $($srvrole.Role) on $($srvrole.DomainInstanceName)")) {
                try {
                    $srvrole.Drop()

                    [pscustomobject]@{
                        ComputerName = $srvrole.ComputerName
                        InstanceName = $srvrole.InstanceName
                        SqlInstance  = $srvrole.SqlInstance
                        ServerRole   = $srvrole.Role
                        Status       = "Success"
                    }
                } catch {
                    Stop-Function -Message "Failed to drop server-role named $($srvrole.Name) on $($srvrole.Name)." -Target $srvrole -ErrorRecord $_ -Continue

                    [pscustomobject]@{
                        ComputerName = $srvrole.ComputerName
                        InstanceName = $srvrole.InstanceName
                        SqlInstance  = $srvrole.SqlInstance
                        ServerRole   = $srvrole.Role
                        Status       = "Failed"
                    }
                }
            }
        }
    }
}
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