GNOME Shell Extensions are directly loaded into the same JavaScript Realm as the Shell itself, so they have access to the same global variables as the Shell.
Most notably, the imports object, which is an odd Proxy-like object that has
properties that correspond to files and folders in the js directory of the
GNOME Shell source code. For example:
imports.ui.main=>gnome-shell/js/ui/main.jsimports.misc.extensionUtils=>gnome-shell/js/misc/extensionUtils.js
GNOME Shell extensions also use this to import their own code. The difference is
that they have to call imports.misc.extensionUtils.getCurrentExtension
to get a reference to themselves and then access the imports property on the
returned reference, which acts like the global imports object, except that its
properties correspond to files and folders in the extensions folder.
The build scripts for this repo spawn a shit ton of promises to do work in parallel, and for whatever reason, this causes node to have fatal errors when exceptions are raised in some promises. So, if you get a fatal exception, its probably this.