git-diff-tree --root

From: Roman Neuhauser <neuhauser@sigpipe.cz>
Date: Sep 12, 2014, 13:06 UTC
Message-ID: <20140912130607.GX4075@isis.sigpipe.cz>

hello,

git-diff-tree without --root is absolutely silent for the root commit, and i see no bad effects of --root on non-root commits. are there any hidden gotchas? IOW, why is the --root behavior not the default?

cram[1] testcase::

  $ git init -q scratch
  $ cd scratch
  $ echo '.*.sw?' > .gitignore
  $ git add .gitignore
  $ git commit -q -m init .gitignore

  $ git diff-tree HEAD

  $ git diff-tree --root HEAD
  [0-9a-z]{40} (re)
  :000000 100644 0000000000000000000000000000000000000000 [0-9a-z]{40} A\\t.* (re)

[1] https://pypi.python.org/pypi/cram

-- 
roman