Data oriented defedntask for boot-clj, sample (macro not included)

build.clj

(def env-web-prod {:resource-paths #{"resources"}
                   :source-paths #{"src/web" "src/shared"}
                   :dependencies '[[org.clojure/clojure "1.9.0-alpha14"]
                                   [adzerk/boot-cljs "2.0.0-SNAPSHOT" :scope "test"]
                                   [org.clojure/clojurescript "1.9.456"  :scope "test"]
                                   [org.clojure/test.check "0.9.0"] ;; AR - at the moment we need it, see http://dev.clojure.org/jira/browse/CLJS-1792
                                   [adzerk/env "0.4.0"]
                                   [binaryage/oops "0.5.2"]
                                   [cljsjs/d3 "4.3.0-3"]
                                   [cljsjs/intersections "1.0.0-0"]
                                   [reagent "0.6.0"]]})

(def conf-web-prod {:env env-web-prod
                    :pipeline '(adzerk.boot-cljs/cljs)
                    :cljs {:source-map true
                           :optimizations :advanced
                           :compiler-options {:closure-defines {"goog.DEBUG" false}
                                              ;; :elide-asserts true
                                              :pseudo-names true ;; TODO set to false for prod
                                              :pretty-print false
                                              :source-map-timestamp true
                                              :parallel-build true
                                              :verbose true
                                              :compiler-stats true}}})

(def env-web-dev (update env-web-prod :dependencies
                         into
                         '[[powerlaces/boot-figreload "0.1.0-SNAPSHOT" :scope "test"]
                           [adzerk/boot-cljs-repl "0.3.3" :scope "test"]
                           [com.cemerick/piggieback "0.2.1"  :scope "test"]
                           [weasel "0.7.0"  :scope "test"]
                           [org.clojure/tools.nrepl "0.2.12" :scope "test"]
                           [binaryage/devtools "0.8.3" :scope "test"]
                           [powerlaces/boot-cljs-devtools "0.1.3-SNAPSHOT" :scope "test"]
                           [pandeiro/boot-http "0.7.6" :scope "test"]
                           [crisptrutski/boot-cljs-test "0.2.2" :scope "test"]]))

(def conf-web-dev
  {:env env-web-dev
   :pipeline '(comp (pandeiro.boot-http/serve)
                    (watch)
                    (powerlaces.boot-cljs-devtools/cljs-devtools)
                    (powerlaces.boot-figreload/reload)
                    (adzerk.boot-cljs-repl/cljs-repl)
                    (adzerk.boot-cljs/cljs))
   :reload {:client-opts {:debug true}}
   :cljs-repl {:nrepl-opts {:port 5088}}
   :cljs {:source-map true
          :optimizations :none
          :compiler-options {:external-config
                             {:devtools/config {:features-to-install [:formatters :hints]
                                                :fn-symbol "λ"
                                                :print-config-overrides true}}}}})

(boot/defedntask build-web
  "Build the web artifact with production configuration"
  []
  conf-web-prod)

(boot/defedntask dev-web
  "Start the web interactive environment"
  [f foo-mode      bool  "Enable foo."] ;; options to tasks are allowed
  (if foo-mode
    (-> conf-web-dev
        (update-in [:env :source-paths] into "dev")
        (assoc-in [:cljs :optimizations] foo-mode)) 
    conf-web-dev))

This looks interesting, were's the macro?