repack: 'write_midx_included_packs' API from the builtin

Now that we have sufficiently cleaned up the write_midx_included_packs()
function, we can move it (along with the struct repack_write_midx_opts)
out of the builtin, and into the repack.h header.

Since this function (and the static ones that it depends on) are
MIDX-specific details of the repacking process, move them to the
repack-midx.c compilation unit instead of the general repack.c one.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/repack.h b/repack.h
index 6aa5b4e0f0..25a31ac0a0 100644
--- a/repack.h
+++ b/repack.h
@@ -101,6 +101,18 @@ void pack_geometry_release(struct pack_geometry *geometry);
 
 struct tempfile;
 
+struct repack_write_midx_opts {
+	struct existing_packs *existing;
+	struct pack_geometry *geometry;
+	struct string_list *names;
+	const char *refs_snapshot;
+	const char *packdir;
+	int show_progress;
+	int write_bitmaps;
+	int midx_must_contain_cruft;
+};
+
 void midx_snapshot_refs(struct repository *repo, struct tempfile *f);
+int write_midx_included_packs(struct repack_write_midx_opts *opts);
 
 #endif /* REPACK_H */