Re: [RFC/PATCH] dontdiff: generate from gitignore

[Randy Dunlap <randy.dunlap@oracle.com>]

Linus Torvalds wrote:
> 
> On Fri, 12 Sep 2008, Randy Dunlap wrote:
>> Generate the "dontdiff" file from the .gitignore files.
> 
> t's not quite as simple as that, though.
> 
> The .gitignore files are fundamentally location hierarchy-aware, so a 
> ignore entry in one subdirectory only affects that subdirectory 
> (recursively), so if you flatten then, you should take that into account.
> 
> As far as I can tell, your script will generate lots of incorrect entries 
> due to this. Eg, it will generate
> 
> 	parse.[ch]
> 
> as a dontdiff pattern, because scripts/genksyms/.gitignore has that, but 
> that means that now it will ignore parse.c in all the _other_ places, 
> where it *isn't* a generated file (ie mm/parse.c).

Yes, that's one of the reasons that it contains "RFC" in $subject.
There's also no handling of !pattern .gitignore lines....

AFAIK, diff with a dontdiff file does not allow/support full pathname
hierarchies like .gitignore does, so this is probably a futile exercise.  ??

-- 
~Randy
Linux Plumbers Conference, 17-19 September 2008, Portland, Oregon USA
http://linuxplumbersconf.org/