On Wed, Dec 02, 2009 at 07:20:28PM +0900, Nanako Shiraishi wrote:
> Quoting David Soria Parra <sn_@xxxxxxx> writes:
>
> > I'm aware that it's not possible to give more than one --track
> > option. Implementing the possibility to specify multiple --track option
> > would certainly a good improvment later, but would also require a lot
> > more work as far as I understand the clone code.
>
> I'm sorry if I'm asking the obvious, but how can multiple --track
> options be a useful future enhancement? If I understand your use
> case correctly, it's useful when you want to work on only one
> branch that isn't the default, and that is why you don't want to
> get data necessary for other branches. What does it mean to give
> two --track options? You will get one master branch that tracks
> both versions, and "git pull" will merge both branches you track?
I would find something like this useful for cloning git.git, where I
explicitly fetch maint, master, next, and pu, but none of html, man, or
todo. This makes "gitk --all" much nicer to view.
However, I don't think --track is the right term. There are really two
things happening here:
1. Setting the fetch refspec(s).
2. Choosing an initial branch to checkout.
We can already do (2) with "-b". But there is no way to do (1)
currently. If we are going to implement (1), I don't see a reason to be
restrictive about it. We should really accept arbitrary refspecs, and
then provide a syntax on top of that for doing both (1) and (2)
together. I am thinking something like:
# most general case
git clone -f 'refs/heads/subset/*:refs/remotes/origin/*' remote.git
# expands to refs/heads/subset/*:refs/remotes/origin/*
git clone -f 'refs/heads/subset/*' remote.git
# expands to refs/heads/subset/*, which then expands as above
git clone -f 'subset/*' remote.git
# multiple -f should add multiple refspec lines
git clone -f maint -f master -f next -f pu git.git
# choose your favorite branch
git clone -f maint -f master -f next -f pu -b next git.git
And for convenience of the user, you would want a way to avoid repeating
the name of the "I want to check this out" branch. So either:
1. Add "--track foo" as a convenience wrapper for "-f foo -b foo".
2. If no "-b" is given, the first "-f" is assumed as "-b". So "git
clone -f foo" becomes equivalent to David's --track.
And of course the name "-f" (for --fetch, if you were wondering) is open
to suggestion.
What do you think?
-Peff
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