Re: [PATCH] ls-files: fix overeager pathspec optimization

[Linus Torvalds <torvalds@linux-foundation.org>]

On Fri, 8 Jan 2010, Junio C Hamano wrote:
> 
> Since "git add" uses the exact same codepath to find the untracked files
> that match the pathspecs, I expected the "fix" will make it complain about
> "t/gomi" being ignored.  Not so.

No. Since 't' is ignored, it won't even do a readdir() in there.

And since it didn't do a readdir() in there, it won't find any files in 
there to add to the ignored list.

And that's how the "git add" logic for "apparently ignored" files works: 
it looks at whether the list of ignored files is empty or not.

> Actually, it does start ignoring t/gomi (the index does not have t/gomi
> after the above sequence with the patch), but lack of the error message
> makes it a rather unfortunate regression---it works as specified in the
> sense that ignored paths are not added to the index unless --forced, but
> it does so without telling the user about it.

I have this memory that _used_ to have a per-filename flag in "git add" 
that checked if that particular filename component was used or not. But 
now it just looks at 'dir->ignored_nr' and 'dir->ignored[]'.

[ Digging back in history.. Yes: commit e96980ef ]

		Linus