Added sparse checkout support

[Tetradeus]

Hi,

Here is my implementation of "Git Sparse Checkout" for CliGitApi.
http://git-scm.com/docs/git-read-tree

The implementation does not seem available yet in JGIT.

"Git Sparse Checkout" feature is really useful when dealing with multi-project Git repository.
It can indeed save a lot of space.
http://stackoverflow.com/questions/10791472/jenkins-and-git-sparse-checkouts

I also have a pull request for Jenkins Git Plugin that enables "Git Sparse Checkout". I will propose it if this one is merged.

Regards,

Thomas

[cloudbees-pull-request-builder]

plugins » git-client-plugin #121 UNSTABLE
Looks like there's a problem with this pull request

[Tetradeus]

retrieveSparseCheckoutPaths() in GitClient is just an helpful method to know if git sparse checkout is active and what are the impacted paths.
This method can indeed be removed without impacting this feature.
This is up to you.

I will move sparseCheckout() in CheckoutCommand in CliGitAPIImpl

Thomas

[jenkinsadmin]

Thank you for a pull request! Please check this document for how the Jenkins project handles pull requests

[ndeloof]

I'd prefer not to expose such very-specific method in GitClient, especially when not supported by JGit.
If unnecessary from git-plugin please remove it.

[cloudbees-pull-request-builder]

plugins » git-client-plugin #124 SUCCESS
This pull request looks good

[Tetradeus]

Hello Ndeloof,

Are you looking for any more review ?

Thanks,

Thomas

[ndeloof]

I'm focussing on fixing remaining bugs in 1.4.x branch at this time, mostly in a "feature-freeze" mode. I will review this asap