For commits with lots of files, Gerrit's diff interface is too broken
to be useful. It does not provide a compact overview of the change
which is essential for effective review.
Luckily, there are alternatives, specifically local git clients and
gitweb. However, these don't work when git's change model is broken by
the use of git commit --amend.
For commits with a small number of files, such changes are reviewable
by the use of the "patch history" table in the diff views. But when
there are a large number of files, it becomes difficult to find the
files which have changed, and if there are a lot of changed files, to
produce a compact combined diff.
So if there are no objections, I'm going to change [[Git/Workflow]] to
restrict the recommended applications of "git commit --amend", and to
recommend plain "git commit" as an alternative. A plain commit seems
to work just fine. It gives you a separate commit to analyse with
Gerrit, gitweb and client-side tools, and it provides a link to the
original change in the "dependencies" section of the change page.
-- Tim Starling