I found this awesome post: Using Invoke-Command -ScriptBlock on a function with arguments
I'm trying to make the function call ( ${function:Foo}
) dynamic, as in I want to pass the function name.
I tried this:
$name = "Foo"
Invoke-Command -ScriptBlock ${function:$name}
but that fails. I also tried various escape sequences, but just can't get the function name to be dynamic.
EDIT: For clarity I am adding a small test script. Of course the desired result is to call the ExternalFunction
.
Function ExternalFunction()
{
write-host "I was called externally"
}
Function InternalFunction()
{
Param ([parameter(Mandatory=$true)][string]$FunctionName)
#working: Invoke-Command -ScriptBlock ${function:ExternalFunction}
#not working: Invoke-Command -ScriptBlock ${invoke-expression $FunctionName}
if (Test-Path Function:\$FunctionName) {
#working,but how to use it in ScriptBlock?
}
}
InternalFunction -FunctionName "ExternalFunction"
Alternate solution:
function foo {'I am foo!'}
$name = 'foo'
$sb = (get-command $name -CommandType Function).ScriptBlock
invoke-command -scriptblock $sb
I am foo!
You could try the following. It tests if the name specified is a valid function before it attempts to run it:
$myfuncnamevar = "Foo"
Invoke-Command -ScriptBlock {
param($name)
if (Test-Path Function:\$name) {
#Function exists = run it
& $name
}
} -ArgumentList $myfuncnamevar
as simple as :
invoke-expression $name
or if you want to keep invoke-commande for remoting for example
Invoke-Command -ScriptBlock { invoke-expression $name}
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