scripts/Uninstall-DoPxModule.ps1

<#############################################################################
The DoPx module provides a rich set of commands that extend the automation
capabilities of the DigitalOcean (DO) cloud service. These commands make it
easier to manage your DigitalOcean environment from Windows PowerShell. When
used with the LinuxPx module, you can manage your entire DigitalOcean
environment from one shell.
 
Copyright 2014 Kirk Munro
 
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
 
    http://www.apache.org/licenses/LICENSE-2.0
 
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
#############################################################################>


# This script should only be invoked when you want to uninstall DoPx.

[CmdletBinding(SupportsShouldProcess=$true)]
[OutputType([System.Void])]
param(
    [Parameter()]
    [System.Management.Automation.SwitchParameter]
    $RemovePersistentData
)
try {
    #region Get the currently installed module (if there is one).

    Write-Progress -Activity 'Uninstalling DoPx' -Status 'Looking for an installed DoPx module.'
    $module = Get-Module -ListAvailable | Where-Object {$_.Guid -eq [System.Guid]'2aa000e6-a689-4443-a34e-20be26bfdabb'}
    if ($module -is [System.Array]) {
        [System.String]$message = 'More than one version of DoPx is installed on this system. This is not supported. Manually remove the versions you are not using and then try again.'
        [System.Management.Automation.SessionStateException]$exception = New-Object -TypeName System.Management.Automation.SessionStateException -ArgumentList $message
        [System.Management.Automation.ErrorRecord]$errorRecord = New-Object -TypeName System.Management.Automation.ErrorRecord -ArgumentList $exception,'SessionStateException',([System.Management.Automation.ErrorCategory]::InvalidOperation),$module
        throw $errorRecord
    }

    #endregion

    #region Remove the module.

    if ($module) {
        Write-Progress -Activity 'Uninstalling DoPx' -Status 'Unloading and removing the installed DoPx module.'
        # Unload the module if it is currently loaded.
        if ($loadedModule = Get-Module | Where-Object {$_.Guid -eq $module.Guid}) {
            $loadedModule | Remove-Module -ErrorAction Stop
        }
        # Remove the currently installed module.
        Remove-Item -LiteralPath $module.ModuleBase -Recurse -Force -ErrorAction Stop
    }

    #endregion

    #region Now remove the persistent data for the module if the caller requested it.

    if ($PSCmdlet.MyInvocation.BoundParameters.ContainsKey('RemovePersistentData') -and $RemovePersistentData) {
        foreach ($mlsRoot in $env:LocalAppData,$env:ProgramData) {
            $mlsPath = Join-Path -Path $mlsRoot -ChildPath "WindowsPowerShell\Modules\$($module.Name)"
            if (Test-Path -LiteralPath $mlsPath) {
                Remove-Item -LiteralPath $mlsPath -Recurse -Force -ErrorAction Stop
            }
        }
    }

    #endregion
} catch {
    $PSCmdlet.ThrowTerminatingError($_)
}
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