How to clone/fetch a git repository with libgit2?

问题:

I need to initialize a git repository and fetch the latest version of a branch into it. In bash, the commands are:

git init
git remote add -t $BRANCH -f origin $REMOTE

I'm trying to do the same programmatically with libgit2, but am having trouble finding the equivalent for the second line. The calls to create a remote are apparent, but I'm not seeing any to add it to a repository or handle the branch.

Is it possible to do this with libgit2? If not, is there a library capable of doing this?

回答1:

High level steps describing how to implement a fetching process in libgit2 can be found here.

You can find example of codes performing such task here and here. Beware these examples might get a little out of sync as the API is moving on.

Please note that those pieces of code will retrieve all newer commits (a branch is only a pointer to a specific commit) from the upstream defined remote.

As of today, there's no way to perform a checkout in libgit2 yet.

Provided you need some more help, I'd recommend those two places:

• the libgit2 mailing list (via [e-mail])
• the libgit2 issue tracker

Update

The clone feature has just been merged into the libgit2 repository.

• clone.h header
• sample code usage in examples/network/clone.c

As part of the pull request, the author took care of providing the users with a checkout implementation as well.

• checkout.h header
• checkout related unit tests