Export all key value pairs from grep output without a loop

grep "=" someFile 

Above is returning few set of key value pairs like below.

foo=bar
id_num=6
some_val=best

Instead of using loop, is there a way to export all variable from the grep output.

Tried something like below, but is not resulting in desired behaviour

grep "=" someFile | tee export

>Solution :

What I would do, if you trust the input file (not generated dynamically by random users):

source <(grep "=" someFile)