(Pipelines) String split; why isn't this working?

[Peter Berghold]

Given an input of: /data/ci/jenkins/workspace/PeterBLaboratory/Test-unittestlibobjs-10/somesubdir/somefile.txt

I have a function:

   

    def basename(path){

        def pieces 

        

        pieces = path.split("/")

        

        context.sh 'echo first element: ' + pieces[0]

        context.sh 'echo path: ' + path

        context.sh 'echo parts: ' + pieces.size

        

        def idx

        idx = pieces.size - 1

        

        return pieces[idx]

    }

and I expect it to return the last element in a split array based on the character '/'

What I'm seeing instead is:

groovy.lang.MissingPropertyException: Exception evaluating property 'size' for java.util.Arrays$ArrayList, Reason: groovy.lang.MissingPropertyException: No such property: size for class: java.lang.String

what the heck is going on here?

It also looks like path.split is not behaving as I'd expect and returning an array of strings based on the delimiter. Thoughts folks?

[Slide]

This is off topic of what you are asking, but why not just use context.echo instead of context.sh? Also, use string interpolation:

context.echo "first element ${pieces[0]}"

Note: you must use double quotes for this to work. 

Also, you can def and assign on the same line:

def pieces = path.split('/').

path.split takes a regular expression, so you need to make sure you are escaping anything that needs to be escaped (in your case it doesn't look like anything does, just something to keep in mind).

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[Slide]

FYI, you want pieces.length, not pieces.size.String.split returns a String[], which you get the length of using .length

https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#split(java.lang.String)