Is there a way to find every single modules which will be needed in script? - powershell

Question

I'd like to use a kinda analyzer which will install/import all the needed modules by the script before I run it on distant machine (which could not have it) ......
any idea ?
EDIT
Here's the case :
I'm on my dev machine, I'ved already installed lots of modules of all kind (dhcp, ntfs, remoting, register, etc.)
When I finally got my script (which is a function) to work, I can't be sure of what modules are used....
What I want is to write down, in the 'begin' section, the correct imports before I send my script on remote PCs; to be sure it's gonna run perfectly, you follow ?...
Is there a kinda a third party appplication which can scan my script and give me all needed modules ?

Answer 1

You could do something like this to get help in finding commands used and their source/module names. It's very unpolished, just trying to give the idea.
$scriptblock = {
Write-Host "Nothing here"
$files = Get-ChildItem c:\temp
Get-ADUser someuser
Test-NetConnection www.google.com
}
# Uncomment following lines and enter the path to your script file
# $scriptFile = "Path\to\some\scriptfile"
# $scriptblock = [scriptblock]::Create((Get-Content -raw -Path $scriptFile))
$ast = $scriptblock.Ast
$commands = $ast.FindAll( { $args[0] -is [System.Management.Automation.Language.CommandAst] }, $true)
$commandText = foreach ($command in $commands) {
$command.CommandElements[0].Extent.Text
}
$commandText |
Select-Object -Unique |
Sort-Object |
Select-Object #{
Label = "CommandName"
Expression = { $_ }
},
#{
Label = "Source"
Expression = {
(Get-Command $_).Source
}
}
Output
CommandName Source
----------- ------
Get-ADUser ActiveDirectory
Get-ChildItem Microsoft.PowerShell.Management
Test-NetConnection NetTCPIP
Write-Host Microsoft.PowerShell.Utility

Answer 2

Yeah, you could for example test if the module exists on that particular machine by trying to import it as follows
Try {
Import-Module dbaclone -ErrorAction stop
#ErrorAction required as failing to import is not a terminating action
} Catch {
Write-Verbose -Verbose "Failed to find dbaclone module - installing"
Install-Module dbaclone -AllowClobber -Force
Write-Verbose -Verbose "Installed!"
Import-Module dbaclone
}