Is it possible to capture the stdout from the sh DSL command in the pipeline

Question

For example:

var output=sh "echo foo"; echo "output=$output"; 

I will get:

output=0 

So, apparently I get the exit code rather than the stdout. Is it possible to capture the stdout into a pipeline variable, such that I could get: output=foo as my result?

Answer 1

Now, the sh step supports returning stdout by supplying the parameter returnStdout.

// These should all be performed at the point where you've // checked out your sources on the slave. A 'git' executable // must be available. // Most typical, if you're not cloning into a sub directory gitCommit = sh(returnStdout: true, script: 'git rev-parse HEAD').trim() // short SHA, possibly better for chat notifications, etc. shortCommit = gitCommit.take(6) 

See this example.

Answer 2

Note: The linked Jenkins issue has since been solved.

As mention in JENKINS-26133 it was not possible to get shell output as a variable. As a workaround suggested using of writ-read from temporary file. So, your example would have looked like:

sh "echo foo > result"; def output=readFile('result').trim() echo "output=$output";