CODEWITHSUNDEEP
bashpipe
Nrestrepo05
Nrestrepo05

Reputation: 21

how to wait until a program finishes to pipe the output

I'm trying to pass a program output as input to another program, but I don't know how to make it wait until the first one is finished.

npm run test | ./script.js

I'm trying to run that, but when I run it, tests are starting and the script is throwing an error immediately

Upvotes: 2

Views: 1721

Answers (1)

Marcio Rocha
Marcio Rocha

Reputation: 189

the pipe gets the standard output directly to standard input, you can use an subshell to execute first then get the standard output into the standard input.

./script.js <<< "$(npm run test)"

other way to do this is to store the output into an temp_file then use this file as input of the script

nmp run test >> temp_file ; ./script.js < temp_file

Upvotes: 2

Related Questions