functions/Update-dbatools.ps1

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#ValidationTags#Messaging,FlowControl,Pipeline,CodeStyle#
function Update-Dbatools {
    <#
  .SYNOPSIS
   Exported function. Updates dbatools. Deletes current copy and replaces it with freshest copy.
 
  .DESCRIPTION
   Exported function. Updates dbatools. Deletes current copy and replaces it with freshest copy.
 
  .PARAMETER Development
   If this switch is enabled, the current development branch will be installed. By default, the latest official release is installed.
  
  .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 WhatIf
   If this switch is enabled, no actions are performed but informational messages will be displayed that explain what would happen if the command were to run.
 
  .PARAMETER Confirm
   If this switch is enabled, you will be prompted for confirmation before executing any operations that change state.
 
  .NOTES
   Tags: Module
   Website: https://dbatools.io
   Copyright: (C) Chrissy LeMaire, clemaire@gmail.com
   License: GNU GPL v3 https://opensource.org/licenses/GPL-3.0
 
  .LINK
   https://dbatools.io/Update-DbaTools
 
  .EXAMPLE
   Update-Dbatools
 
   Updates dbatools. Deletes current copy and replaces it with freshest copy.
 
  .EXAMPLE
   Update-Dbatools -dev
 
   Updates dbatools to the current development branch. Deletes current copy and replaces it with latest from github.
 #>
    
    [CmdletBinding(SupportsShouldProcess=$true, ConfirmImpact="Low")]
    param(
        [parameter(Mandatory=$false)]
        [Alias("dev", "devbranch")]
        [switch]$Development,
        [Alias('Silent')]
        [switch]$EnableException
    )
    $MyModuleBase = [SqlCollaborative.Dbatools.dbaSystem.SystemHost]::ModuleBase
    $InstallScript = join-path -path $MyModuleBase -ChildPath "install.ps1";
    if ($Development) {
        Write-Message -Level Verbose -Message "Installing dev/beta channel via $Installscript.";
        if ($PSCmdlet.ShouldProcess("development branch", "Updating dbatools")) {
            & $InstallScript -beta;
        }
    }
    else {
        Write-Message -Level Verbose -Message "Installing release version via $Installscript."
        if ($PSCmdlet.ShouldProcess("release branch", "Updating dbatools")) {
            & $InstallScript;
        }
    }
}