How to silence a warning or even better if you know why: is assigned but never

Question

$global:ProjectName = $null

function RunFirst(){
  RunSecund
  Write-Host $global:ProjectName
}

function RunSecund(){
    $global:ProjectName = "a name"
}

In RunSecund I get:

The variable 'ProjectName' is assigned but never used. PSScriptAnalyzer(PSUseDeclaredVarsMoreThanAssignments)

there is an issue over at the PSScriptAnalyzer site about this ... i think it has to do with scoping. the rule is not recognizing the scope modifier - and you are using the $Var in more than one scope. ///// as an aside, what you are doing is a bad idea and should be avoided if at all possible. there should be ONE way into a function - the parameters - and ONE way out - the return [or equivalent]. ///// also, the `()` in your function calls is both unneeded and misleading. the last is because it implies that `FuncName (parameter1, parameter2)` is a legit way to call a function. it is NOT. — Lee_Dailey, Jul 20 '19 at 16:01

score 17 · Accepted Answer · answered Jul 20 '19 at 16:54

Easy, don't use global variables!

Although, if you must, you can suppress PSSA warnings with SuppressMessageAttribute:

function RunSecund(){
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUserDeclaredVarsMoreThanAssignments', '', Scope='Function')]
    $global:ProjectName = "a name"
}

How to silence a warning or even better if you know why: is assigned but never

1 Answers1

Easy, don't use global variables!

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