Iteration in a task w/ several shell commands

[davclark]

I am confused about why I am unable to get something like the following task (in a bb.edn) to work:

  last-logs {:doc "Just the last log from each pod"
             :task
             (map
               (fn [pool]
                 (shell (str "stern --no-follow --tail 1 --only-log-lines "
                           (<< "--context {{pool}} appprefix{{*command-line-args*|first}}") )))
               ["pool-a" "pool-b"])
            }

For clarity, the following explicit repetition does accomplish what I'm trying to do:

  last-logs {:doc "Just the last log from each pod"
             :task
             (let [cmd (str "stern --no-follow --tail 1 --only-log-lines "
                            "--context {{pool}} appprefix{{app}}")
                   app (first *command-line-args*)]
               (shell (render cmd {:pool "pool-a" :app app}))
               (shell (render cmd {:pool "pool-b" :app app})) )
            }

I'm providing a simple example, but as you could infer, there could be an arbitrary number of apps, pools, etc. that I might be inspecting at once.

Note that << and render are imported from selmer, along with str like so:

 {:requires ([clojure.string :as str]
             [selmer.parser :refer [<< render]])

[borkdude]

map is lazy, you need to realize the sequence with e.g. doall, but if you're doing this for side effects only, you might as well use run!

[davclark]

I knew it would be easy