support {glue} directive

[marnec]

Context

The {glue} role directive let you reference computed content from code cells to markdown cells across multilpe documents

Proposal

{glue} directive used in markdown cells show content that was glued in code cells.

I would suggest to initially constraint references to same-notebook as it seems to me that cross-notebook references would add to much complexity

Tasks and updates

No response

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[agoose77]

I think, in theory, we can implement glue within jupyterlab-myst, particularly within the current notebook. Doing something for all notebooks would be more work - we'd probably need a server extension and have to deal with state management.

To support per-notebook glue, we would want to walk the outputs of the current notebook, and to do that the Markdown renderer would need this context. This is possible, but it might be a bit hacky. I won't be able to work on it any time soon, though.In the mean time, eval does work, which might be an acceptable stop gap.