Create custom groovy closure to reuse shell() feature - jenkins

Question

I am using Groogy DSL plugin in my Jenkins server. I realize this step is repeated in many places and jobs.
steps {
shell('''#!/bin/bash -ex
|aws s3 cp s3://${STACK_S3_BUCKET_NAME}/file myfile --region ${AWS_REGION}
|aws s3 cp s3://${STACK_S3_BUCKET_NAME}/otherfile .
|
|'''.stripMargin())
I am new using Groovy and I will like to create kind of custom Groovy Step or Closure to avoid this process, I will like to do something like:
awsS3cp {
from: '${ORIGIN}'
to: '${DESTINATION}'
}
Then implement something like this:
def awsS3cp { context ->
shell('''#!/bin/bash -ex
|aws s3 cp s3://$from $to
|'''.stripMargin())
}
Attempt 1
I did it in this way and it failed:
def awsS3cp(String from, String to) {
shell("""#!/bin/bash -ex
|echo 'copy from $from to $to'
|""".stripMargin())
}
def createEnvironmentJob = freeStyleJob( jobName )
createEnvironmentJob.with{
description( jobDescription )
steps {
awsS3cp ("S3-SOURCE-BUCKET","S3-TARGET-BUCKET")
}
}
The error output:
No signature of method: create_environment.shell() is applicable for argument types: (java.lang.String) values: [#!/bin/bash -ex
echo 'copy from S3-SOURCE-BUCKET to S3-TARGET-BUCKET'
]
Possible solutions: queue(java.lang.String), sleep(long), every(), grep(), job(java.lang.String), queue(javaposse.jobdsl.dsl.Job)
Finished: FAILURE

Answer 1

One option would be to define a function outside:
def awsS3cp(String from, String to) {
return sh("""#!/bin/bash -ex
|aws s3 cp s3://$from $to
|""".stripMargin())
}
Then, call it inside of the pipeline definition:
steps {
awsS3cp('source', 'destination')
}