[PATCH v2 0/2] unpack-trees.c w/o the_repository

[Junio C Hamano <gitster@pobox.com>]

unpack_trees() API serves as low-level functions to implement merge
and checkout.  It heavily relies on the_repository, making it clear
it only works with that repository instance.  We however can use the
repository instance pointed at by key data structures passed
throughout the callchain.

This is almost the exact copy of what I have at 

    https://lore.kernel.org/git/xmqqtsltbfdv.fsf@gitster.g/

The only changes since that version are removals of two blank lines.

 1/2: unpack-trees: lose USE_THE_REPOSITORY
 2/2: unpack-trees: consistently use "struct index_state *istate"

 unpack-trees.c | 180 ++++++++++++++++++++++++++++++++-----------------
 1 file changed, 118 insertions(+), 62 deletions(-)

-- 
2.56.0-626-gaba6dc7e00