Provide warning for specifically named PowerShell commands

Question

Is it possible to configure a PowerShell session to warn me any time I run a specifically named command/function?

As an example (I'd like to get warnings every time I use a command that begins with "Set-"):

       If I run a Get-foo command, it runs that command without warning.
       If I run a Set-foo command, then it provides a warning about changes being made.

I'm not sure why this was down-voted (Perhaps the 'user responsibility' motivation?. Please help me understand why at least :) — l0c0b0x
– l0c0b0x, Commented Mar 12, 2018 at 18:08

TheMadTechnician · Accepted Answer · 2018-03-12 18:04:32Z

4

You can use the $PSDefaultParameterValues variable to define defaults, and many Set- commands include a 'Confirm' parameter, or a 'WhatIf' parameter. You could do something like:

$PSDefaultParameterValues = @{
    "Set-*:Confirm"=$true
    "Set-*:WhatIf"=$true
}

The format for this is a hashtable, where the key is ":" and the value is the value that you want to set. Wildcards are permitted for cmdlet names, so you can apply the setting to all Set- cmdlets easily enough.

If you wanted to use 'WhatIf' you would simple have to run the command with -WhatIf:$false if you want the command to actually do things rather than just tell you what it would have done.

Get-Item C:\Temp\*.docx | Copy-Item -Dest "$home\desktop" -WhatIf:$false

See this page for more information about the topic.

answered Mar 12, 2018 at 18:04

TheMadTechnician

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