从 shell 脚本自动化 Node.js CLI 程序

Question

I and trying to execute a node.js CLI program which takes an input from user to decide the next step.

I am able to start the program by node index.js after this I want to send 1 as input. Is there a way I can give input to my node.js program.

My dumb brain came up with following script

--Script.sh--
node index.js
1
2

which obviously didn't work.

Answer 1

Maybe this would work?

Create an answers.txt file with each input on its own line:

first
second

then run the command like this: node index.js < answers.txt

The < will redirect input to the specified file instead of stdin.

Answer 2

What about:

#!/bin/dash
echo "Type something or 'q' to quit and press Enter!"
while read user_input; do
    if [ "$user_input" = 'q' ]; then
        break
    else
        echo "You've typed: ""$user_input"
        # do something
        # node index.js "$user_input"
    fi
done