PS script for importing remote commands, functions, modules, etc.

Import-RemoteCommands.ps1

#* FileName: Import-RemoteCommands.ps1
#*=============================================
#* Script Name: Import-RemoteCommands
#* Created: 07/10/2014-published
#* Author: David S. Elias
#* Email: daveselias@gmail.com
#* Requirements: PowerShell v2.0+
#* Keywords: Function, module, command, cmdlet, import, remoting
#*=============================================

#*=============================================
#* REVISION HISTORY
#*=============================================
#* Date: 07/15/2014
#* Time: 1:50PM
#* Issue: Get-PSSnapin, Import-Module and Import-PSSession
#*        always cause warnings or errors
#* Solution: Changed ErrorActions from Stop to
#*           SilentlyContinue
#*=============================================

<#
.Synopsis
   Imports all Commands, functions, modules and snapins not already found in the active console session
.DESCRIPTION
   Imports all Commands, functions, modules and snapins not already found in the active console session
   from the specified computer(s).
.EXAMPLE
   Import-RemoteCommands.ps1 -ComputerName DC1

   Attempting Remote session connection to DC1 using New-PSSession
   Attempting Get-Pssnapin on DC1
   Attempting Import-Module on DC1
   Attempting Import-PSSession from DC1

   ###################################################
   
   Congratulations, you have imported 907 new commands
   
   ###################################################
.EXAMPLE
   Import-RemoteCommands.ps1 -ComputerName DC1, DC2

   Attempting Remote session connection to DC1 using New-PSSession
   Attempting Get-Pssnapin on DC1
   Attempting Import-Module on DC1
   Attempting Import-PSSession from DC1

   Attempting Remote session connection to DC2 using New-PSSession
   Attempting Get-Pssnapin on DC2
   Attempting Import-Module on DC2
   Attempting Import-PSSession from DC2

   ###################################################

   Congratulations, you have imported 1207 new commands
   
   ###################################################
#>

Param
(
    # Server Name(s) to import modules, functions and cmdlets from
    [Parameter(Mandatory=$true,
                ValueFromPipelineByPropertyName=$false,
                Position=0)]
    [array]
    $ComputerName
)

Begin{
    
    [array]$ALL = $ComputerName

    IF($ALL.count -lt 1){

        Write-Error -Message "No Server Names Were Provided" -ErrorAction Stop
        EXIT 1
    
    }

    $List=@()
    ForEach($item in $ALL){

        Try{
            
            $Alive = Test-Connection -ComputerName $item -Count 1 -Quiet -ErrorAction Stop

            IF($Alive -eq $true){
                    
                $List += $item
                
            }
        
        }Catch{

            Write-Warning -Message "Unable to find $item"

        }
    }

    $PSV = $PSVersionTable.PSVersion.major

    IF($PSV -eq 2){

        $LocalCommands = Get-Command

    }ELSEIF($PSV -ge 3){

        $LocalCommands = Get-Command -All

    }
}

Process{
    
    ForEach($Server in $List){
    
        Try{
            
            Write-Host "Attempting Remote session connection to $Server using New-PSSession" -ForegroundColor Green
            $Active = New-PSSession -ComputerName $Server -ErrorAction Stop
            
            Try{
            
                Write-Host "Attempting Get-Pssnapin on $Server" -ForegroundColor Green
                Invoke-Command -Session $Active { Get-PSSnapin -Registered | ForEach-Object { Add-PSSnapin -Name $_.name } } -ErrorAction SilentlyContinue

                Try{

                    Write-Host "Attempting Import-Module on $Server" -ForegroundColor Green
                    Invoke-Command -Session $Active { Get-Module -ListAvailable | ForEach-Object { Import-Module -Name $_.Name } } -ErrorAction SilentlyContinue

                    Try{
                
                        Write-Host "Attempting Import-PSSession from $Server" -ForegroundColor Green
                        Import-PSSession -Session $Active -ErrorAction SilentlyContinue
                
                    }Catch{
                
                        Write-Warning -Message "Unable to execute Import-PSSession on $Server"
                
                    }

                }Catch{
                
                    Write-Warning -Message "Unable to execute Import-Module on $Server"
                
                }

            }Catch{
                
                Write-Warning -Message "Unable to execute Get-Pssnapin on $Server"
            
            }
        
        }Catch{
            
            Write-Error -Message "Unable to connect to remote session on $Server and import requested functions, cmdlets, modules" -ErrorAction Stop

        }
    }
}

End{
########################### Compare commands to verify if any new commands were imported ###########################

    IF($PSV -eq 2){

        $AfterCommands = Get-Command
        $NewCommands = Compare-Object -ReferenceObject $LocalCommands -DifferenceObject $AfterCommands

    }ELSEIF($PSV -ge 3){

        $AfterCommands = Get-Command -All
        $NewCommands = Compare-Object -ReferenceObject $LocalCommands.Name -DifferenceObject $AfterCommands.Name

    }
    
        IF($NewCommands.count -lt 1){
        
        Write-Error -Message "No New functions, cmdlets or modules were imported"
    
    }ELSEIF($NewCommands.count -gt 1){
        
        Clear-Host
        Write-Host "###################################################" -ForegroundColor Cyan
        Write-Host " " -ForegroundColor Cyan
        Write-Host "Congratulations, you have imported $($NewCommands.count) new commands" -ForegroundColor Green
        Write-Host " " -ForegroundColor Cyan
        Write-Host "###################################################" -ForegroundColor Cyan
    
    }
}