On Mon, Mar 23, 2015 at 9:00 PM, Duy Nguyen <pclo...@gmail.com> wrote:
> On Sun, Mar 22, 2015 at 10:33 AM, Eric Sunshine <sunsh...@sunshineco.com> 
> wrote:
>> On Fri, Mar 20, 2015 at 6:36 AM,  <mdc...@seznam.cz> wrote:
>>> Any idea what I am doing wrong?
>>
>> The fourth bullet point of the "Pattern Format" section of the
>> gitignore man page has this to say, which explains the behavior you're
>> seeing:
>>
>>     An optional prefix "!" which negates the pattern; any matching
>>     file excluded by a previous pattern will become included again.
>>     It is not possible to re-include a file if a parent directory of
>>     that file is excluded. Git doesn’t list excluded directories for
>>     performance reasons, so any patterns on contained files have no
>>     effect, no matter where they are defined.
>
> This is true. To elaborate, if we have to recurse in excluded
> directories so that we can include some back, then the reason for
> excluding is already defeated as we may need to traverse the entire
> directory structure. However in this particular case where we do know
> in advance that only certain directories may have "re-include" rules,
> e.g. "db", "reports" or "scripts", we could keep going for a while. I
> think I attempted to do this in the past and failed (don't remember
> exactly why). Maybe I'll try again some time in future.

I also was pretty sure that you had attempted this, but couldn't find
a reference to it, so I didn't mention it in my response. However,
with some more digging, I finally located it[1].

[1]: http://article.gmane.org/gmane.comp.version-control.git/259870

> Another option is, if the user is willing to accept performance
> degradation (in many small repos, it does not matter anyway), then we
> could keep digging in.
> --
> Duy
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