How to make step-name dynamic in a Lemur defstep

test_jobdef.clj

# Based on https://gist.github.com/gareth625/5d69cd883b3a154f0fa7
# Run it with `lemur run test_jobdef.clj`

(catch-args
[:run-step
 "Set as the name of the step"
 "lemur-is-awesome"])

(defcluster the-cluster
    :app "AnApp"
    :run-id "Unique"

    :num-instances 2 ; Includes the master.
    :master-instance-type "m1.small"
    :slave-instance-type "m1.small"

    :bucket "metail-s3-scratch"
    :runtime-jar "s3://fake-location"

    :keypair "rar"
    :endpoint "elasticmapreduce.eu-west-1.amazonaws.com")

(defstep the-step
  :main-class "example.main"
  :step-name "x-${run-step}-x")

(fire! the-cluster the-step)

(println "---------Raw")
(println the-step)
(println "Raw form won't work, because defstep returns a regualr Map, not an evaluating map:"
         (:step-name the-step))

(println "---------Evaluated 1")
(println "step-name from evaluating-map, won't work because the actual step name
         comes form the command line args, which is part of 'the-cluster', and
         not included here."
         (:step-name
           (lemur.evaluating-map/evaluating-map the-step)))

(println "---------Evaluated 2")
(println "step-name from evaluating-step. This works, because you now have an
         evaluating-map and you are including the values from 'the-cluster', which
         includes the catch-args stuff."
         (:step-name (evaluating-step the-cluster the-step)))

; (wait-on-step the-step 864000)
; (wait-on-step (lemur.evaluating-map/evaluating-map the-step) 864000)
(wait-on-step (evaluating-step the-cluster the-step) 864000)