Question

I want to pass the output of a Sed command to a variable in batch.
For example, in the file “input.txt” I have name=kiddy bla bla.
I want to extract the the word kiddy and save it in a variable (say, name), so I can use it later (with %name%).

Answer 1

Sure, you can set a variable with the output of a sed command with a for loop:

for /f %%v in ('sed blah blah...') do (set "name=%%v")

Yes, it’s not so intuitive, but it works.
Also, you can change the command to anything you want, as long as it’s between
apostrophes (').

P.S
To extract the value kiddy from name="kiddy" bla bla, use such sed syntax:

sed "s/""/'/g" | sed "s/.*='\(.[^']*\)'.*/\1/"