Powershell function with $args and named parameter-CodePudding

I currently have the following powershell function:

function d { doppler run -- $args }

However, I would like to run something like d -Config dev ... and have that translate to

doppler run --config dev -- ...

How can I accomplish this?

CodePudding user response：

If you want to add an optional parameter to your function you would no longer be able to use $args the same way you're currently using it. By adding a new parameter to your non-advanced function the same would be always bound positionally (-Config would be always bound hence wouldn't be optional).

What you could do instead to replace its functionality is turn your function into an advanced one and have a parameter that takes ValueFromRemainingArguments.

I haven't tested it but I believe this should do the trick.

function d {
    [CmdletBinding(PositionalBinding = $false)]
    param(
        [Parameter(Position = 0, ValueFromRemainingArguments)]
        [string[]] $Arguments,

        [Parameter()]
        [string] $Config
    )

    end {
        doppler @(
            'run'
            if($PSBoundParameters.ContainsKey('Config')) {
                '--config', $Config
            }
            '--'
            $Arguments
        )
    }
}

Then both options should be available, with and without -Config:

PS ..\> d some arguments here
PS ..\> d -Config dev some arguments here

CodePudding user response：

The function needs to declare a parameter.

function d ($config)
{ 
    doppler run --config $config 
}

See documentation for more details -> https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_functions?view=powershell-7.3#functions-with-parameters