Output of shell command into a variable

[Sam K]

Currently, I'm doing this.  

sh '<some-command>  > /tmp/aa'

def VAR1 = readFile('/tmp/aa')

This mostly works.  But oftentimes the variable has a newline and so it messes up its usage. 

Is there a better way to store the output in a variable without having to deal with the newline? 

thanks

[Mark Waite]

If you're inside a pipeline script and calling sh (or bat), then you can use a slightly different syntax and it will assign the output of the shell command as the return value.

See https://github.com/MarkEWaite/jenkins-bugs/blob/2e662560a42571b18ec32d78d1ac730952075d78/Jenkinsfile#L52 for an example, or the stackoverflow answer at http://stackoverflow.com/questions/36507410/is-it-possible-to-capture-the-stdout-from-the-sh-dsl-command-in-the-pipeline# .

Mark Waite

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[Sam K]

Your answer works like a charm, but will still give me a problem with the newline in the end.  I added the trim() from the stackoverflow answer and now the output is what I want.  

Thanks again!!

Sam