How to use exec() output in gradle

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This is my preferred syntax for getting the stdout from exec:

def stdout = new ByteArrayOutputStream()
exec{
    commandLine "whoami"
    standardOutput = stdout;
}
println "Output:\n$stdout";

Found here: http://gradle.1045684.n5.nabble.com/external-process-execution-td1431883.html
(Note that page has a typo though and mentions ByteArrayInputStream instead of ByteArrayOutputStream)

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