MultiGreet

MultiGreet demonstrates how to use the js-plugins NPM package.

The purpose of MultiGreet is to print a greeting to a set of audience members. However the list of audience members is not pre-defined, or even a program input: it is determined by connecting MultiGreet plugins.

Each plugin implements an interface that returns the name of an audience member. At runtime, MultiGreet scans for plugins that extend the multigreet:audience extension point and then greets the aggregated audience by name.

Plugins are implemented in the three main ways:

1. Direct registration with the plugin manager in the host app (i.e. MultiGreet)
2. Packages in other directories (sibling and non-sibling)
3. Packages installed globally

MultiGreet registers all of these audiences, and then on connecting processes their return values.

Usage

1. From the MultiGreet repository, run npm install -g to install globally.
2. Run multigreet to see who is in the audience.
3. Install the plugin-planets package globally by running npm run installGlobal.
4. Run multigreet again to see who is in the new audience.
5. If you like, run npm uninstall -g js-plugins-example-planets and try again.