packfile: move `get_multi_pack_index()` into "midx.c"

The `get_multi_pack_index()` function is declared and implemented in the
packfile subsystem, even though it really belongs into the multi-pack
index subsystem. The reason for this is likely that it needs to call
`packfile_store_prepare()`, which is not exposed by the packfile system.
In a subsequent commit we're about to add another caller outside of the
packfile system though, so we'll have to expose the function anyway.

Do so now already and move `get_multi_pack_index()` into the MIDX
subsystem.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/midx.h b/midx.h
index e241d2d690..6e54d73503 100644
--- a/midx.h
+++ b/midx.h
@@ -94,6 +94,7 @@ void get_midx_chain_filename(struct odb_source *source, struct strbuf *out);
 void get_split_midx_filename_ext(struct odb_source *source, struct strbuf *buf,
 				 const unsigned char *hash, const char *ext);
 
+struct multi_pack_index *get_multi_pack_index(struct odb_source *source);
 struct multi_pack_index *load_multi_pack_index(struct odb_source *source);
 int prepare_midx_pack(struct multi_pack_index *m, uint32_t pack_int_id);
 struct packed_git *nth_midxed_pack(struct multi_pack_index *m,