Thoughts on addrequire?

[timholy]

JLD supports addrequire to allow folks to ensure that necessary packages are loaded before objects from a JLD file. If you'd support this, I will eventually get around to submitting a PR.

[JonasIsensee]

This could actually be really neat!

I just took a look at the implementation in JLD.
I think it could be improved for JLD2:

• Use a _requires subgroup that contains entries for every requirement. That avoids having to delete a list over and over again AND it would be readable using tools like h5dump.
• Attach version number of loaded package. This allows for future extension to warn users if there are major version number changes.

f["_requires/DataFrames"] = versionofloadedpackage(DataFrames)

[lbenet]

Any progress on this?

[JonasIsensee]

Hi @lbenet ,
there is #377 which implements something like this. The PR has been sitting around unused for a while since I wasn't super convinced, it was optimal but it does work.
You are welcome to test and give feedback.