Would it be possible to add temporary dependency graph?

Internals & Design
1

For Julia packages dependency graphs are saved in Project/Manifest files.

Would it be possible to have a way to add to the dependency graph branches that are session-specific?
My user case is a MainPackage that call function foo!(a_dic) of packages that are defined in a settings file (could be name, url, version…).
If I programmatically Pkg.add these packages, I would change the Project/Manifest, while I would like this changes to live only in memory for the current session.

Any though?

2

Just activate a temporary environment and start adding.

Be prepared that switching environments during a session can be brittle since package versions in different environments may differ and the first loaded version will be used, which may or may not lead to compatibility problems.

3

Ok, I’ll try with adding a separate temp environment, altought I think it is nicer to have one environment, where some components are just not permanent

4

If you initialize the temporary environment with your current Project and Manifest files, the effect should be rather similar to what you’re asking for?