tree cda676c5c77cf7d0d6cffaf4b9686d57381db504
parent 1cf28ed9a9bdf403c25a3bfda3cb4a7a4cbbeaf8
author Youssef Elghareeb <ghareeb@google.com> 1613682057 +0100
committer Youssef Elghareeb <ghareeb@google.com> 1614083296 +0100

Surface comparison type and old/new commit IDs in the file diff output

This is needed because callers of the diff cache can request a diff
against parent, hence they don't know which base commit will be picked.
Surfacing this information so that callers can have access to it.

Change-Id: I06f5811bdec43b4ec0b401b9ea20097ac5297424