Read-host not passing variable? - powershell

Question

So I writing some code to run some patching on AWS, I have the following script snippet taken out of the whole thing for now.. I seem to be running into an issue with $PSBoundParameters..
(It's Friday & I've had a long week so I may just need to sleep on it) - but I can't seem to pass anything out of read-host...
param (
[Parameter(Mandatory = $true)][ValidateNotNullorEmpty()][string]$Prof,
[Parameter(Mandatory = $false)][ValidateNotNullorEmpty()][string]$Reminder,
[Parameter(Mandatory = $false)][ValidateNotNullorEmpty()][string]$AddToTGs,
[Parameter(Mandatory = $false)][ValidateNotNullorEmpty()][string]$PatchType,
[Parameter(Mandatory = $false)][ValidateNotNullorEmpty()][string]$Instance,
[Parameter(Mandatory = $false)][ValidateNotNullorEmpty()][string]$Environment
)
function PromptInstance {
$Instance = Read-Host -Prompt "Please Specify the Instance"
Write-Host "Using: $Instance" -ForegroundColor Cyan
}
function PromptEnvtoPatch {
$Environment = Read-Host -Prompt "Please Specify the Environment (e.g. dev)"
Write-Host "Using: $Environment" -ForegroundColor Cyan
}
function PromptReminder {
$title = "Calendar"
$message = "Do you want to Add an Outlook Reminder in 24 Hrs?"
$pA = New-Object System.Management.Automation.Host.ChoiceDescription "&Yes", "Adds an Outlook Reminder"
$pB = New-Object System.Management.Automation.Host.ChoiceDescription "&No", "Won''t add a reminder"
$options = [System.Management.Automation.Host.ChoiceDescription[]]($pA, $pB)
$CalResult = $host.ui.PromptForChoice($title, $message, $options, 0)
switch ($CalResult)
{
0 {
$global:CalRes = 1
Write-Host "Reminder will be added.." -ForegroundColor Cyan
}
1 {
$global:CalRes = 0
Write-Host "No Reminder will be added.." -ForegroundColor Cyan
}
}
}
function PromptAddToTGs {
$title = "Re-Add to Target Groups"
$message = "Do you want to have this script Automatically add the instances back into the Target Groups after Patching?"
$pA = New-Object System.Management.Automation.Host.ChoiceDescription "&Yes", "Will ADD the instance back into Target Groups"
$pB = New-Object System.Management.Automation.Host.ChoiceDescription "&No", "Will NOT add the instance back into Target Groups"
$options = [System.Management.Automation.Host.ChoiceDescription[]]($pA, $pB)
$result = $host.ui.PromptForChoice($title, $message, $options, 1)
switch ($result)
{
0 {
$global:AddTGRes = 1
Write-Host "Instances WILL be added back into Target Groups" -ForegroundColor Cyan
}
1 {
$global:AddTGRes = 0
Write-Host "Instances will NOT be added back into Target Groups" -ForegroundColor Cyan
}
}
}
function PromptPatchType {
$title = "Patching Type"
$message = "Do you want to Patch a Single Instance, or ALL Instances for a specific Team Env?"
$pA = New-Object System.Management.Automation.Host.ChoiceDescription "&Instance", "Patches an Instance"
$pB = New-Object System.Management.Automation.Host.ChoiceDescription "&ALL Instances for an Env", "Patches ALL Instances in a Team Env"
$pQ = New-Object System.Management.Automation.Host.ChoiceDescription "&Quit", "Cancel/Exit"
$options = [System.Management.Automation.Host.ChoiceDescription[]]($pA, $pB, $pQ)
$PatchResult = $host.ui.PromptForChoice($title, $message, $options, 0)
switch ($PatchResult)
{
0 {
$Instance = Read-Host "Please Specify the Instance Id"
}
1 {
$Environment = Read-Host "Please Specify the Team (i.e. dev)"
}
2 {
Write-Host "You Quitter!... :-)"
Exit
}
}
}
function KickOffPatchingEnv {
param ($Prof, $Reg, $Reminder, $AddToTGs, $PatchType, $Environment)
Write-Host "Using the Following Options: (Profile:$Prof) (Region:$Reg) (Reminder:$Reminder) (AddToTGs:$AddToTGs) (PatchType:$PatchType) (Environment:$Environment)"
}
function KickOffPatchingInst {
param ($Prof, $Reg, $Reminder, $AddToTGs, $PatchType, $Instance)
Write-Host "Using the Following Options: (Profile:$Prof) (Region:$Reg) (Reminder:$Reminder) (AddToTGs:$AddToTGs) (PatchType:$PatchType) (Instance:$Instance)"
}
switch -wildcard ($Prof) {
"*dev*" { $Reg = "eu-west-1"; $Bucket = "s3-dev-bucket" }
"*admin*" { $Reg = "eu-west-1"; $Bucket = "s3-admin-bucket" }
"*prod*" { $Reg = "eu-west-1"; $Bucket = "s3-prod-bucket" }
"*staging*" { $Reg = "eu-west-1"; $Bucket = "s3-staging-bucket" }
}
if (!$PSBoundParameters['Reminder']) { PromptReminder }
if (!$PSBoundParameters['AddToTGs']) { PromptAddToTGs }
if ($PSBoundParameters['PatchType']) {
if (($PatchType -eq "i") -or ($PatchType -eq "instance") -or ($PatchType -eq "I") -or ($PatchType -eq "Instance")) {
if (!$PSBoundParameters['Instance']) { PromptInstance }
KickOffPatchingInst $Prof $Reg $Reminder $AddToTGs $PatchType $Instance
}
if (($PatchType -eq "a") -or ($PatchType -eq "all") -or ($PatchType -eq "A") -or ($PatchType -eq "All")) {
if (!$PSBoundParameters['Environment']) { PromptEnvtoPatch }
KickOffPatchingEnv $Prof $Reg $Reminder $AddToTGs $PatchType $Environment
}
} else { PromptPatchType }
If I use the parameters on the command line, it works fine..
PS C:\Users\myself\Desktop> .\test.ps1 -Prof dev -Reminder y -AddToTGs y -PatchType a -Environment dev
Using the Following Options: (Profile:dev) (Region:eu-west-1) (Reminder:y) (AddToTGs:y) (PatchType:a) (Environment:dev)
But if I omit an option, say for instance the Environment, I'm prompted for it, but the value is not displayed..
PS C:\Users\myself\Desktop> .\test.ps1 -Prof dev -Reminder y -AddToTGs y -PatchType a
Please Specify the Environment (e.g. dev): dev
Using: dev
Using the Following Options: (Profile:dev) (Region:eu-west-1) (Reminder:y) (AddToTGs:y) (PatchType:a) (Environment:)
Environment is empty....
I've tried loads of different things such as setting global:Environment etc, but I always seem to be missing out whichever variable isn't specified in the command?
Maybe this isn't the best way to write this, but i've never used $PSBoundParameters before so this is my first time trying it out..
Can anyone see my glaring error here at all?
TIA :)

Answer 1

#Mathias R. Jessen answered this for me.
I put this in the function
function PromptProfile {
$Prof = Read-Host -Prompt "Please Specify the Profile"
$global:UserProf = $Prof
}
then changed code later on with the global variable, so I can use them