Renders an msc file into an SVG. It presents the SVG wrapped in a live-reloaded HTML page, so that whenever the msc file is saved, the image is regenerated and the browser will auto-refresh the image.

$ brew bundle # Installs msc
$ bundle      # Installs Ruby prereqs

1. bundle exec guard
2. thin start
3. Open localhost:3000 in the browser

Every subsequent save to an msc file will trigger a browser refresh, e.g. after touch doc/livereload.msc.

A guard rule is set up to generate an SVG from each msc file in the root directory of this app like this:

$ mscgen -T svg -i *.msc

For the MSC syntax, see the msc home page.

The inner workings of this app are explained in the file livereload.msc. If guard is running, it will generate livereload.svg whenever livereload.msc changes. Due to the change in livereload.svg, guard will then notify the livereload server to send an update request to all connected browsers:

http://localhost:3000/livereload

wraps

http://localhost:3000/livereload.svg

in a simple HTML page with livereload.

Thin needs to restart in order to pick up changes in the web app. This can be automated with

$ bundle exec rerun -d lib thin start

• Post MSC from browser-form so that we don't need local files
• Make it a gem that has a bin script that can serve any directory
  • mscfiddle doc/livereload.msc would launch a web server that livereloads whenever this file was changed