tree 82d45014df438bc2b04a71e46b328151e2ad8a84
parent 48d933fd937c84e52e9883ac63b0f53c80298f17
author Roy Williams <royw@fb.com> 1382989245 -0700
committer Michael Bolin <mbolin@fb.com> 1383166230 -0700

Prompt user to clean their buck directory.

Test Plan:
Buck build with garbage in my buckdir, verify I was prompted, verify if I cleaned
my dir cache hits worked, if I didn't there were no cache hits.