Task edge cases

[borkdude]

Given the following tasks:

{:tasks {:init (do
                 (ns my-ns)
                 (def ^:dynamic *jdk* nil)
                 ;; workaround
                 (alter-meta! (var *jdk*) assoc :dynamic true)
                 (def ^:dynamic *server* nil)
                 (alter-meta! (var *server*) assoc :dynamic true))
         :enter (println "Task:" (:name (babashka.tasks/current-task)))
         jdk (println "JDK:" *jdk*)
         server {:depends [jdk]
                 :task (println "Server:" *server*)}
         run-all (doseq [jdk [8 11 15]
                         server [:foo :bar]]
                   (binding [*jdk* jdk
                             *server* server]
                     (babashka.tasks/run 'server)))}}

we see the following issues:

• dynamic vars aren't dynamic (due to an issue with how metadata is processed). Workaround: alter-meta!.
• each run runs in a random namespace, but all tasks should run in the same namespace. Workaround: set namespace manually and use fully qualified symbols for task built-ins.