Pipe two commands in NodeJS

Question

I need to transform a CLI into a "spawn" syntax in nodejs, and I got into a little mess, couldn't figure out from the docs what to do with it.

the syntax is something like this:

 somecommand -a op1 -b op2 | othercommand -c op1 -d op2

The "othercommand" should get "live" output from "somecommand". and I want to monitor "othercommand"'s output.

Thanks, Tal.

Maybe gulp with the gulp-run package can solve it: github.com/cbarrick/gulp-run — gyss
– gyss, Commented Mar 15, 2015 at 17:05

Johnnie Zhang · Accepted Answer · 2015-03-15 16:59:49Z

2

In your somecommand.js, write your output to process.stdout, in othercommand.js, pipe process.stdin to a stream such as though, doing your work with the stream, then pipe the stream to process.stdout

answered Mar 15, 2015 at 16:59

Johnnie Zhang

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1 Comment

Jentel Over a year ago

I don't deal with javascript, i deal with BASH commands. kinda like ps aux | grep 'something'

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