tree e288248d15a370ed5da37a530e1bf9d49400c228
parent 6e4fb958b5bd7f2d52a080ca3eaef365587b3e3d
author Youssef Elghareeb <ghareeb@google.com> 1636133805 +0100
committer Youssef Elghareeb <ghareeb@google.com> 1636133805 +0100

Fix dropping comments in emails for root commits

When we request diffs against root commits (the first initial commit of
the branch that has no parents), DiffOperations returns
ObjectId.zeroId() for oldCommitId. This requires proper handling by the
callers.

Two of these callers did not do this handling: ChangeEmail and
PatchFile. This resulted in dropping comments and unified diffs in
change emails. In this change we fix these two callers to check for old
commit IDs.

Bug: Google b/204435292
Change-Id: Ieb31232ba4414c844676f168b2732fc1b9ab2d0d