Source From Standard In (Bash on OSX)

Question

I am trying to do something like this

 ruby test.rb | source /dev/stdin

where test.rb just prints out cd /. There are no errors, but it doesn't do anything either. If I use this:

 ruby test.rb > /tmp/eraseme2352; source /tmp/eraseme2352

it works fine, but I want to avoid the intermediate file.

Edit: The whole point of this is that the changes need to persist when the command is done. Sorry I didn't make that clearer earlier.

Answer 1

You can try:

$(ruby test.rb)

$(...) tells bash to execute whatever output is produced by command inside ().

Answer 2

eval `ruby test.rb`