ScenicLiveReload

A live reloader for Scenic. Once configured, when you edit a file the current root scene will be killed, when it is restarted it will use any new code currently in the running beam instance.

How it works:

• Uses exsync to watch the file system
• When you edit a file with your editor, exsync recompiles and reloads that beam file
• exsync notifies scenic_live_reload that files were reloaded
• scenic_live_reload kills the currently displayed root scene
• The OTP Supervisor for that scene restarts the scene with the updated code

Demo

In this demo I replace the text "World" with "Scenic", then change the color of the text to purple. Next I change the shape of the bezier line.

Note: the code running in the demo can be found at https://github.com/axelson/scenic_live_reload_demo

See also: scenic-starter-pack

Installation

Add scenic_live_reload to your list of dependencies in mix.exs:

def deps do
  [
    ...
    {:scenic_live_reload, "~> 0.3", only: :dev},
  ]
end

Add this configuration to your config.exs:

case Mix.env() do
  :dev ->
    config :exsync,
      reload_timeout: 150,
      reload_callback: {ScenicLiveReload, :reload_current_scenes, []}

  _ ->
    nil
end

Then start your application with mix scenic.run (or iex -S mix), edit a file with your editor, and then you should see your change reflected.

Development

NOTE: This currently relies on a private scenic api to get the root scene which may change in future Scenic releases