Hi all,
Have released the first version of a ClojureScript compiler component,
to build and serve ClojureScript files in a Component-based system.
(It's in the Phoenix repo at the moment, but can be used as a standalone
Component in any other system - you don't need to use Phoenix to use it
(although do check it out, it's great! #biased)).
I'm still figuring out how/whether this fits into a normal Reloaded
workflow, but would be interested to hear others' thoughts - is this
something you'd find useful?
https://github.com/james-henderson/phoenix/tree/master/modules/cljs
Include it in your system map as:
(phoenix.modules.cljs/make-cljs-compiler {:source-path "ui-src"
:target-path "target/cljs/"
:web-context-path "/js"
:main myapp.ui.app
:externs [...]
:modules {...}
:dev {:optimizations :none
:pretty-print? true}
:build {:optimizations :advanced
:pretty-print? false}})
(the return value of this satisfies com.stuartsierra.component/Lifecycle)
When your system starts, the Component will compile your CLJS, and watch
the source-path for changes, re-compiling if necessary. You can then use
this Component as a dependency in your web handler - it provides a small
Ring handler that'll serve the compiled JS for you:
(ns myapp.handler
(:require [compojure.core :refer [routes GET]]
[com.stuartsierra.component :as c]
[hiccup.page :refer [html5]]
[modular.ring :refer [WebRequestHandler]]
[phoenix.modules.cljs :as cljs]))
(defn handle-page [req cljs-compiler]
(html5
[:head
[:title ...]
;; the Component returns the relative path of the JS file,
;; for you to include in a <script> tag
[:script {:src (cljs/path-for-js cljs-compiler)}]
...]
[:body
...]))
(defrecord AppHandler []
WebRequestHandler
(request-handler [{:keys [cljs-compiler] :as this}]
(routes
(GET "/" {:as req}
(handle-page req cljs-compiler))
(cljs/cljs-handler cljs-compiler))))
For more details, see the README :)
Big thanks to David Nolan for his recent changes to the ClojureScript
compiler, and the improved docs!
James
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