tree 74340e5a1d925a956191d58bbbc18271d62a22ae
parent 764c71d56d6cafb688f31eb40b5a13deb2aac0cb
author Dave Borowitz <dborowitz@google.com> 1546890796 -0800
committer Dave Borowitz <dborowitz@google.com> 1546890796 -0800

ForProject: Deduplicate refs when converting to map

This implementation has no control over the ref list that is passed in.
One place where this is called is from DefaultAdvertiseRefsHook, which
passes a caller-provided set of prefixes that may overlap.
getRefsByPrefix is explicitly documented to return duplicate refs when
prefixes overlap.

In preparing this change, I inspected all instances of toMap in the diff
of b024eef9~..a9d003ed to catch recently-introduced issues. This was the
only one that was not converting the entire set of refs; in the latter
case, those do not contain duplicates.

Change-Id: I2541ef924406a5c09b47a54be0735451c6357173