[PATCH 0/4] "git reset --merge" related improvements

As agreed during private discussions, I am trying to refactor and merge some interesting bits of code from the GSoC sequencer project.

So here is a first round about "git reset".

Patches 1/4 and 2/4 are using sequencer code to speed up "git reset" and add some test cases for "git reset --merge".

Patches 3/4 and 4/4 are implementing "git reset --merge-dirty" and showing the differences with "--merge". "--merge-dirty" is a really bad name for the index reset option that is available using the "allow_dirty" global variable in the sequencer. These 2 patches are for discussing this feature.

Christian Couder (2):
  reset: add a few tests for "git reset --merge"
  reset: add test cases for "--merge-dirty" option

Stephan Beyer (2):
  reset: use "unpack_trees()" directly instead of "git read-tree"
  reset: add option "--merge-dirty" to "git reset"

 builtin-reset.c        |   81 +++++++++++++++++++++++++++-------
 t/t7110-reset-merge.sh |  114 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 179 insertions(+), 16 deletions(-)
 create mode 100755 t/t7110-reset-merge.sh