VCS comparison table

[Jakub Narebski]

Johannes Schindelin wrote:
> On Fri, 20 Oct 2006, Jakub Narebski wrote:
> 
>> Jeff King wrote:
>>> 
>>> I was accustomed to doing such things in CVS, but I find the git way
>>> much more pleasant, since I don't have to do any arithmetic:
>>>   diff d8a60^..d8a60
>> 
>> By the way "diff d8a60" also works (unless d8a60 is merge commit, in
>> which case you would need "diff -c d8a60" or "diff -m d8a60").
> 
> I could be wrong, but I have the impression (even after actually testing 
> it) that "git diff d8a60" is equivalent to "git diff d8a60..HEAD", _not_ 
> "git diff d8a60^..d8a60".

Ooops, I mixed git-diff-tree (which behaves as mentioned above) with
git-diff, which according to documentation compares with working tree
(and not HEAD) if only one <tree-ish> is given.

git-diff(1):
       ?  When  one  <tree-ish>  is given, the working tree and the named tree are
          compared, using git-diff-index. The option --cached can be given to com-
          pare the index file and the named tree.

git-diff-tree(1):
       If there is only one <tree-ish> given, the commit is compared with its par-
       ents (see --stdin below).
-- 
Jakub Narebski
Poland