twitter/commons — pull request #270 by jsirois (2014-03-26 05:31:13+00:00)
Title: Guard against long ids.

The BuildInvalidator uses ids that most often come from targets and
these can be lengthy when the targets are synthetic. If the id > ~250
characters, this will produce a hash filename that's too long for most
common filesystems. Guard against this with safe_filename and shorten
to a hash iff needed to avoid this.

https://rbcommons.com/s/twitter/r/150/