Shallow clone detection (or depth)

[giarve]

There are many times when we perform a shallow clone, and later we use the tool without realizing we are only taking N last commits but not the whole commit history since when the module was added.

Maybe a confirmation alert (answer y/n) would be better than performing a full clone without asking first.

[sebalix]

Good point. Should we block fully the use of the tool on such cloned repository? A warning+confirmation is probably not enough if we want to prevent the opening of PRs on OCA with limited commits history.

[sebalix]

Putting that here: https://stackoverflow.com/questions/37531605/how-to-test-if-git-repository-is-shallow