Why does the jenkinsfile use a closure in this way?

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Why does the jenkinsfile use a closure in this way?

red 888

Its a command pattern to write jenkins pipeline code like this:

def call(body) {

    def config = [:]
    body.resolveStrategy = Closure.DELEGATE_FIRST
    body.delegate = config

Im not sure how to word this simply, but this closure get implicitly imported and can be called by the file name of the .groovy file it lives in.

I call it like: MyClosher{myarg ='sdfsdf}

I not entirely sure what this is doing. Its doing call(body) and then assigning body as the delegate. so that means the closure i pass it is the delegate, but isn't that just the owner? wah me confused.

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