Re: Add "git grep" helper

Linus Torvalds [off-list ref] writes:

Actually, the more I think about it, the more I think Morten was right, 
and the git-grep case statement should just put all flags in "$flags", and 
any git-ls-files flags can be handled specially before.

We also need special casing for grep flags that take an argument.  So the
end result might be something like the following..

Arrrrrrrrrrrrrrrrrrrgh.

Now, whose grep are we going to support?  Should we teach every
flag GNU grep supports that can take a parameter to the script?

Can we cheat and do something like this instead?

    git grep -B 6 -A 2 frotz -- arch/i386
    git grep -B 6 -A 2 frotz --others arch/i386

That is, things up to a known git-ls-files flag  or -- are
passed to grep and the rest is given to git-ls-files.