Js content should be in same package directory

[devinrsmith]

deephaven-plugin-plotly-express has demonstrated packaging js content within a wheel. Currently, this content lives sourced in its own directory from the root, /tmp/dpe/lib/python3.11/site-packages/js/plotly-express/. I would have expected this content to live in the same subdirectory as the python content itself; for example /tmp/dpe/lib64/python3.11/site-packages/deephaven/plot/express/js/.

[mofojed]

Yea that makes sense... perhaps it should be prefixed with an _ to denote that it is private, e.g. /tmp/dpe/lib64/python3.11/site-packages/deephaven/plot/express/_js/
Then upon install, how does the plugin manager know where to pull the js source from? How does it know it's at deephaven/plot/express directory? We have version = attr:deephaven.plot.express.__version__ in the setup.cfg, would we need something similar for the location of the js?

[devinrsmith]

I added strawman of how I think this should work in deephaven/deephaven-core#2772 (comment)

[devinrsmith]

Agreed, _ prefix is a good idea too.

[mofojed]

Fixed with #361