Jenkins Groovy script to execute shell commands

user_5629839 0
Viewed 31114

I'm using a groovy script to calculate my build duration and publish a metric to Hosted Graphite, from the command line the following curl will result with the intend effect:

echo {someMetricHere} | nc carbon.hostedgraphite.com 2003

However in my groovy script the last step having generated a metric is to run the following:

"echo "+ metric +" | nc carbon.hostedgraphite.com 2003".execute()

Its returning:

Caught: java.io.IOException: Cannot run program "|": error=20, Not a directory java.io.IOException: Cannot run program "|": error=20, Not a directory at hudson8814765985646265134.run(hudson8814765985646265134.groovy:27) Caused by: java.io.IOException: error=20, Not a directory ... 1 more

I assume the command doesn't understand the "|" part of the command, any suggestions how I can fix this script to run the intended bash? I thought it might be possible to create a .sh file in the workspace but am not sure how.

Pastebin for those wanting to see full script: https://pastebin.com/izaXVucF

Cheers :)

graphite jenkins shell groovy bash
4 Answers

to use pipe | try this code:

// this command line definitely works under linux:
def cmd = ['/bin/sh',  '-c',  'echo "12345" | grep "23"']
// this one should work for you:
// def cmd = ['/bin/sh',  '-c',  'echo "${metric}" | nc carbon.hostedgraphite.com 2003']

cmd.execute().with{
    def output = new StringWriter()
    def error = new StringWriter()
    //wait for process ended and catch stderr and stdout.
    it.waitForProcessOutput(output, error)
    //check there is no error
    println "error=$error"
    println "output=$output"
    println "code=${it.exitValue()}"
}

the output:

error=
output=12345
code=0
user_12766640

If you have to pass in a variable to a groovy script, you do it using ${variableName}. Double quotes are not interpreted like the way you think they would, and every compiler treats it in a weird way.

In your case, the below line should help to do the thing you want:

sh "echo ${metric} | nc carbon.hostedgraphite.com 2003"
user_13782400
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