builtin/receive-pack: lift global state out of unpack()

In git-receive-pack(1), writing the packfile to the transaction is
handled via `unpack()` which relies on global variables to decide how to
invoke the underlying git-index-pack(1) or git-unpack-objects(1) child
processes. In a subsequent commit, the `unpack()` logic is moved behind
a generic ODB transaction interface to handle writing packfiles and thus
can no longer rely on these globals.

Lift the global state out of `unpack()` by instead storing this state in
a `struct unpack_opts` that gets passed to the function explicitly.

Signed-off-by: Justin Tobler <jltobler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

0 files changed, 0 insertions, 0 deletions