Re: git log broken?

[Michael J Gruber <git@drmicha.warpmail.net>]

Torgny Nyblom venit, vidit, dixit 22.09.2010 09:48:
> Hi,
> 
> (Resend as it got no replies and I want to be sure that is wasn't lost
> in the noise)
> 
> I'm working on converting the KDE subversion repository to git, as
> a part of this I'm trying to validate that the conversion hasn't missed
> any revisions or merges but when I run "git log" with different options
> I get (in my mind) strange results.
> 
> git log <file> -> produces a list of commits
> git log --follow <file> -> produces an empty list (no output)
> git log --name-status <file> -> no info about file
> 
> It seems like this occurs when there is a merge only commit as the
> first commit in the list returned by the "bare" log command.
> 
> Is there any legit situation where this might happen?
> If so what?
> If not is this a bug in my convert program or in git?

Can you share this repo or (even better) create a minimal test which
reproduces this?

Trying with a recent git and "some" merge commit I don't see that behaviour.

Note that, e.g., subversion needs to create commits for each tag which
git-svn turns into "no-op" commits (introducing no diff). They can
disappear easily if your conversion process involves rebasing or
filter-branching. (I'd recommend converting those commits into annotated
tags.)

Michael