[Act] YAPCEU::2015

[Alex Muntada]

Philippe Bruhat (BooK):

> Note that with git your checkouts can share the object database
> (using hardlink), if you clone using -l. This was you can save
> some space.

GIT_OBJECT_DIRECTORY and GIT_ALTERNATE_OBJECT_DIRECTORIES environment
variables can be used too to share objects in a project. It's very
interesting when there are lots of branches checked out at the same
time.

Cheers,
Alex