如何使用循环变量响应 shell 脚本中的提示

Question

I have a cli command to delete an entity like admin delete <<entity>> .

Now, my usecase is to delete a bunch of entities with entity names in a file. I can just iterate over the file and delete these entities like:

cat file.txt | while read entity 
do
   admin delete $entity
done 

The catch is that the admin delete <<entity>> command asks for a confirmation of the name of the entity before deleting the entity like To proceed, type the full name of the entity again here .

How do I feed in the loop variable as the response to this prompt during the shell script execution for each entity?

Answer 1

A simple go-around is using a here document .

admin delete $entity <<< $entity

For comparision:

fn() { local x && read x; [ "$x" = "$1" ] && echo yep || echo nope; }

run as

var=smthg
foo=smthg
fn $var <<< $foo