Siddharth Agarwal 9eb63ab31f ensure all MPaths are non-empty ... Summary: A lot of Mononoke expects MPath instances to be non-empty, and some Mononoke code wants empty MPaths. Have formerly-empty `MPath` instances be represented as `None` instead. There's a bit of a wart where we have to check for some instances being empty even though they should never be. This is not a regression -- this is actually a deficiency in our current type hierarchy being exposed. `Entry` can sometimes represent a root manifest, but a root path and a root manifest will never be joined together in practice. We may want to figure out a better way to represent that in the future. Also clean up a bunch of code that checks for empty `MPath` instances. That just isn't possible any more -- yay. Reviewed By: StanislavGlebik Differential Revision: D7359048 fbshipit-source-id: 684f908dabaa06cb25b1dd33f4fd7bb021cb5e1b		2018-03-22 05:21:57 -07:00
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if	mononoke-types: add types for file changes	2018-03-20 08:57:42 -07:00
mocks	mononoke-types: add a type to represent datetimes	2018-03-20 08:57:42 -07:00
src	ensure all MPaths are non-empty	2018-03-22 05:21:57 -07:00