How can I make figwheel start with a custom initial namespace?

The project.clj of my clojurescript code specifies :repl-options {:init-ns my-project.core} and I start figwheel via start-figwheel!. In the figwheel documentation it says that

;; you can also just call (ra/start-figwheel!)
;; and figwheel will do its best to get your config from the
;; project.clj or a figwheel.edn file`

But when figwheel starts, it puts me into the cljs.user namespace. How can I make figwheel pick up this option?

My figwheel.clj looks as follows:

(require '[figwheel-sidecar.repl :as r]
         '[figwheel-sidecar.repl-api :as ra])

(ra/start-figwheel!
  {:figwheel-options {}
   :build-ids ["dev"]
   :all-builds
   [{:id "dev"
     :figwheel {:devcards true}
     :source-paths ["src"]
     :compiler {:main 'my-project.core
                :asset-path "js"
                :output-to "resources/public/js/main.js"
                :output-dir "resources/public/js"
                :verbose true}}]})

(ra/cljs-repl)

I am basically asking this question from Google groups.

Solution

start-figwheel! only starts figwheel logic. Regarding your finding that:

;; you can also just call (ra/start-figwheel!)
;; and figwheel will do its best to get your config from the
;; project.clj or a figwheel.edn file`

It indeed finds its config but it's only :figwheel submap of project.clj.

:repl-options are used by REPL when it starts. It seems that figwheel-sidecar.repl-api/cljs-repl doesn't allow specifying REPL options and it doesn't read them from project.clj.

You might try to play with starting lein repl where project.clj's :repl-options use :init option to provide the code you want to execute instead of a standalone script.