Shadow CLJS run from deps
This demonstrates a workflow that is common and included in the shadow-cljs-users guide. It presents some complications for CIDER at the moment.
The workflow
This is a bog standard shadow-cljs app that is managed by deps rather than shadow-cljs. The difficulty lies in that the user or tooling is responsible for starting up shadow-cljs server.
This can be accomplished by starting up the process with the shadow middleware included:
/usr/local/bin/clojure -Sdeps '{:deps {nrepl {:mvn/version "0.6.0"} cider/piggieback {:mvn/version "0.4.2"} cider/cider-nrepl {:mvn/version "0.24.0"}}}' -m nrepl.cmdline --middleware '["cider.nrepl/cider-middleware", "cider.piggieback/wrap-cljs-repl", "shadow.cljs.devtools.server.nrepl/middleware"]'Then from the repl we have only to start the server and then proceed as normal:
;; Connected to nREPL server - nrepl://localhost:64852
;; CIDER 0.25.0snapshot, nREPL 0.6.0
;; Clojure 1.10.0, Java 1.8.0_202
;; Docs: (doc function-name)
;; (find-doc part-of-name)
;; Source: (source function-name)
;; Javadoc: (javadoc java-object-or-class)
;; Exit: <C-c C-q>
;; Results: Stored in vars *1, *2, *3, an exception in *e;
;; Startup: /usr/local/bin/clojure -Sdeps '{:deps {nrepl {:mvn/version "0.6.0"} cider/piggieback {:mvn/version "0.4.2"} cider/cider-nrepl {:mvn/version "0.24.0"}}}' -m nrepl.cmdline --middleware '["cider.nrepl/cider-middleware", "cider.piggieback/wrap-cljs-repl", "shadow.cljs.devtools.server.nrepl/middleware"]'
;;
;; ClojureScript REPL type: shadow
;; ClojureScript REPL init form: (do (require '[shadow.cljs.devtools.api :as shadow]) (shadow/watch :app) (shadow/nrepl-select :app))
;;
Execution error (ExceptionInfo) at shadow.cljs.devtools.server.runtime/get-instance! (runtime.clj:11).
missing instance
user>
user> (require '[shadow.cljs.devtools.server :as server])
nil
user> (server/start!)
Feb 27, 2020 8:51:37 PM org.xnio.Xnio <clinit>
INFO: XNIO version 3.7.3.Final
Feb 27, 2020 8:51:37 PM org.xnio.nio.NioXnio <clinit>
INFO: XNIO NIO Implementation Version 3.7.3.Final
Feb 27, 2020 8:51:37 PM org.jboss.threads.Version <clinit>
INFO: JBoss Threads version 2.3.2.Final
shadow-cljs - HTTP server available at http://localhost:3000
shadow-cljs - server version: 2.8.83 running at http://localhost:9631
shadow-cljs - nREPL server started on port 65233
:shadow.cljs.devtools.server/started
user> (require '[shadow.cljs.devtools.api :as shadow])
nil
user> (shadow/watch :app)
[:app] Configuring build.
[:app] Compiling ...
[:app] Build completed. (155 files, 1 compiled, 0 warnings, 3.77s)
:watching
user> (shadow/nrepl-select :app)
To quit, type: :cljs/quit
[:selected :app]
cljs.user>The Execution error above is from the standard startup command for shadow not finding a running server. We then start it with (shadow.cljs.devtools.server/start!) and then invoke the normal startup routine to get a repl.
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