How to evaluate PowerShell script inputed from stdin

powershell stdin

The following would work:

Use a scriptblock:

echo "echo 12;" | powershell -noprofile -noninteractive -command { $input | iex }

Or use single quotes to avoid the string interpolation:

 echo "echo 12;" | powershell -noprofile -noninteractive -command '$input | iex'

so the $input variable isn't expanded, and the string '$input' is passed to iex.

Both of these give me "12".

powershell stdin

Just use - as a source file "name":

echo "echo 12;" | powershell -noprofile -noninteractive -

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