[RFC] allow git pull to preserve merges

Hey,

Following up on an old thread (2008):

http://git.661346.n2.nabble.com/pull-preserve-merges-td1471688.html

I'd like to finally add a config parameter/setting to allow git pull to preserve merges when it's rebasing. This addresses a somewhat common boundary case of a locally merged feature branch getting flattened into master, as described here:

http://notes.envato.com/developers/rebasing-merge-commits-in-git/

This current patch adds a new `pull.preserve-merges` boolean config setting, but we could also change the existing `pull.rebase` to be tri-state (so `pull.rebase` can be true, false, or preserve-merges), or add a more generic `pull.rebaseoptions` that is just a string of flags to pass to rebase.

Any of these would be fine with me--what would be preferred?

This patch doesn't update the docs, but I wanted to get an initial sanity check on the preferred config setting before doing that.

Thanks!

- Stephen

Stephen Haberman (1):
  pull: Allow pull to preserve merges when rebasing.

 git-pull.sh     | 11 +++++++++--
 t/t5520-pull.sh | 15 +++++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)