What is a dirty submodule?

Question

I see ignore = dirtyin the file .gitmodule.

Example:

[submodule "docs/submodules/netvirt"]
    path = docs/submodules/netvirt
    url = ../netvirt
    branch = .
    ignore = dirty

The documentation states:

"dirty" ignores all changes in the submodule tree and accepts only the differences between the HEAD of the submodule and the fixation recorded in the superproject.

I can’t understand what this means. Can anyone put this in plain language?

I understand that when I added the submodule to the super project, it was in state C (HEAD in C), and then later, once it was now in state F (HEAD in F). ignore=dirtywill only consider changes to D, E, F (which should do!)

It is clear that I did not understand something. What is it?

Answer 1

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