Powershell Switch parameter accepting argument

Question

How can I make $m switch accept one argument but $prebuild doesn't need any argument.

Param (
 [Parameter(Mandatory=$true)]
 [Switch]$m,
 [Switch]$prebuild
)

The script would be executed as below but I get the following error.

.\test.ps1 -m java
A positional parameter cannot be found that accepts argument 'java'

Mathias R. Jessen · Accepted Answer · 2021-08-03 10:57:47Z

4

Change $m to a [string]:

param(
  [string]$m,
  [switch]$prebuild
)

To test whether an argument was passed by the caller, use the $PSBoundParameters automatic variable:

if($PSBoundParameters.ContainsKey('m')){
  # An argument was passed to `-m`
}

(This last part is unnecessary if you keep the [Parameter(Mandatory=$true)] attribute)

answered Aug 3, 2021 at 9:22

Mathias R. Jessen

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