'ignore' for paket.dependencies

Several of the projects I work on involve modifying and restoring project files to a stable state and paket making modifications to these project files breaks all of the tests. Typically I use git to discard the changes after paket upgrade (the context where I encounter this issue the most), but being able to list the directories that I don't want paket to search through would be ideal.

I think a convention like

ignore /testdata/
ignore /test-data
ignore test-projects/

where ^ are all dirs, paket won't search that dir and all of its children and

ignore /experiments/lab01.fsproj

will ignore that specific project

and maybe even

ignore /samples/amazing.sln

will ignore all projects in that particular solution (this might be a bad idea)

open questions

• is it worthwhile to include a more complicated ignore syntax similar to git's ? (this probably isn't worth the effort)
• should there be a way of listing multiple dirs together in a group, perhaps like TOML's arrays? (I'm not sure this is a good idea)
• under what circumstances should warnings be emitted? e.g. when a dir or file doesn't exist, are there any circumstances when this should cause a failure state?
• should unix path standards be enforced universally? or should a case invariant search be used on unix where the closer match is ignored? or should the os standard be used and users get a warning on unix when the path couldn't be found but the case invariant search finds a match?

(you can assign this to me)