Re: [PATCH 3/2] dir.c: fix dir re-inclusion rules with "NODIR" and "MUSTBEDIR"

[Duy Nguyen <pclouds@gmail.com>]

On Fri, Mar 18, 2016 at 1:21 PM, Durham Goode <durham@fb.com> wrote:
>> Skipping that tricky pair, the pairs "/*" and "!/dir1/dir2/" means
>> "exclude everything except dir1/dir2" (in .gitignore sense) or
>> "include everything except dir1/dir2" in sparse checkout sense. Which
>> results in empty worktree. 1+2 trips when the trailing slash in the
>> last rule exists and includes both files in show/hide. Patch 3/2 fixes
>> the tripping and exclude both. If the last rule is "!/dir1/dir2" then
>> 1+2 results in empty worktree as well.
>>
> I'm not sure I fully understand.  Here's what I'm seeing, with patch 1, 2,
> and 3 applied:  with patterns "/*', "!/dir1/dir2", "/dir1/dir2/show", I see
> the contents of dir1/dir2/show/ (good). If I add a trailing slash to the
> last pattern (so it becomes "/dir1/dir2/show/"), it now results in an empty
> working copy. That seems funky, given that the last rule is to include that
> directory. Am I misunderstanding the trailing slash?

Ah.. I meant the last slash in !dir1/dir2/, not in dir1/dir2/show. But
that's interesting, will need to run some more tests.

> We're pretty far beyond my ability to understand ignore patterns now.

I'm right there with you. I'm starting to fear that I don't (and
probably won't) understand this thing.
-- 
Duy