Jenkins groovy script execution for dynamic parameters

Question

I am trying to use active choice parameters in jenkins . I am executing a shell command and trying to show the output in the choice parameters. 1) Working scenario -

Text file already generated by the output of shell command and able to see the parameters -

list = []
def process = "cat /home/ansible/test1.txt".execute()
process.text.eachLine {list.add it}
return list

Here test1.txt is already populated with the values

2) Failure scenario Instead of pre-populating the file trying the get the shell command output and write into a file and then show it to the choice parameters-

list = []
def process1=" sh script.sh > test1.txt".execute()
def process = "cat /home/ansible/test1.txt".execute()
process.text.eachLine {list.add it}
return list

This is not working

Is there any suggestions ?

Does this answer your question? groovy syntax for executing unix command with process output — cfrick
– cfrick, Commented Dec 25, 2019 at 21:15

daggett · Accepted Answer · 2019-12-26 02:43:40Z

1

Use pure groovy to read file lines

new File('/home/ansible/test1.txt').readLines()

For your case - wrap your code with try-catch to see the error.

Without error message it's hard to help you...

try{
  def list ....
}catch(e){ return [e.toString()] }

answered Dec 26, 2019 at 2:43

daggett

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5 Comments

pratik rudra Over a year ago

Thanks . But in Jenkins , where should I get the groovy script related errors.

Tidhar Klein Orbach Over a year ago

you should see the output in the Jenkins server log.

daggett Over a year ago

With try-catch you should see error directly in drop-down. BTW, the other problem in your code - you are not waiting till the end of the process.

pratik rudra Over a year ago

Thanks , I solved it . It seems I was using some environment variable which wasn't getting evaluated , could you pls elaborate "not waiting till the end of the process" ?

daggett Over a year ago

for example: stackoverflow.com/questions/44372447/…

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