Support tailing commands

[goldbergyoni]

Great work, love this.

I run eslint and testing and npm audit and other quality tasks, and the stdout is overwhelming for one to absorb and understand the status. Could you allow tailing each command for few lines?

When I do it myself using bash - "command | tail -n 5" - then the exit code is always 0 (which is the wrong behaviour of course).

[gustavohenke]

Hm, that's a great idea!

Can you please provide more input on the following questions:

• Is the tailing global, per command, or both?
• Do event logs, like [lint] npm run lint exited with code 0, count towards the maximum number of lines?
• How should processes that get restarted (--allow-restart/--restart-tries) behave?

[goldbergyoni]

Per command.

.Start simple, then enrich: 1st version will just output the last n lines of each process run (=each restart will show additional n lines). Then once it's ready, let's see what enhancements people are asking for

Consider a CI spin-off of your project where we constantly run quality tasks (lint, license check, test, etc) and show only meaningful notice to the developers

[milahu]

workaround:

$ printf "a\nb\nc\nd\ne\nf"
a
b
c
d
e
f
$ printf "a\nb\nc\nd\ne\nf" | tail -n4
c
d
e
f
$ node bin/concurrently.js "bash -c \"printf \\\"a\nb\nc\nd\ne\nf\\\" | tail -n4\""
[0] c
[0] d
[0] e
fbash -c "printf \"a\nb\nc\nd\ne\nf\" | tail -n4" exited with code 0