Ad-hoc ClojureScript scripting of Mac applications via Apple's Open Scripting Architecture.

Experimental.

$ brew install babashka/brew/obb

Download from Github releases.

Evaluate an expression:

$ obb -e '(-> (js/Application "Safari") (.-documents) (aget 0) (.url))'
"https://clojure.org/"

$ obb -e '(-> (js/Application "Google Chrome") (.-windows) (aget 0) (.activeTab) (.title))'
#js ["GitHub - babashka/obb: Ad-hoc ClojureScript scripting of Mac applications"]

Or evaluate a file:

$ obb examples/choice.cljs

Or make an executable script by using obb in a shebang:

#!/usr/bin/env obb
(-> (js/Application "Safari")
    (.quit))

ClojureScript code is evaluated through SCI, the same interpreter that powers babashka. SCI is compiled to JavaScript which is then by executed by osascript.

SCI supports macros as first class citizens so you can write a few macros to deal with interop boilerplate:

(defmacro ->clj [obj & interops]
  (let [names (map #(clojure.string/replace (str %) #"[.-]" "") interops)
        ks (mapv keyword names)
        exprs (mapv #(list % obj) interops)]
    `(zipmap ~ks [~@exprs])))

(-> (js/Application "Spotify") (.-currentTrack) (->clj .artist .album .name))
;;=>
{:artist "The Gathering", :album "How to Measure a Planet? (Deluxe Edition)", :name "Travel"}

• Mac Automation Scripting Guide
• JXA Cookbook
• Scripting with JXA
  • It illustrates a way to find an App's properties and elements.

Open Script Editor.app, go to File > Open Dictionary and select the application you would like to explore, e.g. Spotify.app. After selection, select JavaScript instead of AppleScript.

Read here how to create an application bundle from an obb script.

• babashka: Native, fast starting Clojure interpreter for scripting.
• nbb: Ad-hoc CLJS scripting on Node.js using SCI.
• scittle: The Small Clojure Interpreter exposed for usage in browser script tags.

Install Babashka. Then build with:

$ bb build

Then place out/obb anywhere on your path.

To develop obb you can use the bb dev task which starts a shadow-cljs server and a file watcher.