Check if the current application is JupyterLite

[brichet]

The plugin should run only on Jupyterlite , to avoid conflicts with nbgitpuller if installed alongside this extension on Jupyterlab.

Problem

Check if the current application is Jupyterlite and not Jupyterlab.

Additional context

See comment #4 (comment)

[jtpio]

Or as an alternative to checking for JupyterLab or JupyterLite, maybe checking whether the nbgitpuller extension is available?

[brichet]

Right.
According to you, is there a way to test a server extension from the frontend ?
The only way I can think of is to use the Rest API ?

[jtpio]

Maybe making a request to one of the nbgitpuller endpoints would work?

[bollwyvl]

Yep, we've tried really hard to to make it hard to tell if an extension is running in lite to avoid making things that would work in Lab only work in lite.

Perhaps lite core needs a marker token in the "client" side of the app, similar to optional: [ILabShell] (useful for distinguishing between lab and notebook). As the switch to @jupyterlite/* 0.2.0 is imminent, perhaps this could be something very small, e.g. an ILiteInfo extension, which consolidated some common access patterns and contained the cooked-in version (e.g from package.json, not PageConfig strings, which can be changed, by design).

[brichet]

Yep, we've tried really hard to to make it hard to tell if an extension is running in lite to avoid making things that would work in Lab only work in lite.

This is exactly what I'm trying to do 😄

In that specific case @jtpio is right, it should not run only if nbgitpuller is installed, otherwise it can run in lab.