Summary:
The megarepo generator now adds new directories and files automatically. We now pick folders and paths randomly, with a configurable number of subdirectories and a configurable length for the leaf filename, and a fixed alphabet.
The array of directories and leaf filenames are prorated: they start out constrained and grow as we approach our desired number of commits to generate (`repogenerator.numcommits`), so as not to be too sparse initially.
The directory array is randomized initially, so the above proration doesn't lead to a trivial edit pattern (e.g. everything in a/* initially.)
Lastly, we now stop generation when we hit our goal.
Reviewed By: quark-zju
Differential Revision: D7572968
fbshipit-source-id: b60d60b6262962ee114cb19b0989e6a1af8c0549
Summary: This script can be used to generate a large number of commits.
Reviewed By: DurhamG
Differential Revision: D7363243
fbshipit-source-id: 1a1e3ba7fca29dc695446eeffb715474ea2943ad
