[PATCH 02/11] midx: extern a pair of shared functions

[Taylor Blau <me@ttaylorr.com>]

The following commits will incrementally move code specific to writing
MIDXs from midx.c to their new home in midx-write.c.

Prepare for that by externing a pair of functions which:

  - will (temporarily) need to be called from both midx.c and
    midx-write.c, but

  - are implementation details that should not be exposed via the midx.h
    header.

Declare these functions as extern within midx-write.c, and introduce a
similar (non-extern) declaration within midx.c. This change will be
effectively reverted by the end of this series.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 midx-write.c | 10 ++++++++++
 midx.c       | 24 +++++++++++++++++-------
 2 files changed, 27 insertions(+), 7 deletions(-)

diff --git a/midx-write.c b/midx-write.c
index 214179d308..4aab273243 100644
--- a/midx-write.c
+++ b/midx-write.c
@@ -1,2 +1,12 @@
 #include "git-compat-util.h"
 #include "midx.h"
+
+extern int write_midx_internal(const char *object_dir,
+			       struct string_list *packs_to_include,
+			       struct string_list *packs_to_drop,
+			       const char *preferred_pack_name,
+			       const char *refs_snapshot,
+			       unsigned flags);
+
+extern struct multi_pack_index *lookup_multi_pack_index(struct repository *r,
+							const char *object_dir);
diff --git a/midx.c b/midx.c
index 85e1c2cd12..5f22f01716 100644
--- a/midx.c
+++ b/midx.c
@@ -23,6 +23,16 @@
 #include "list-objects.h"
 #include "pack-revindex.h"
 
+struct multi_pack_index *lookup_multi_pack_index(struct repository *r,
+							const char *object_dir);
+
+int write_midx_internal(const char *object_dir,
+			       struct string_list *packs_to_include,
+			       struct string_list *packs_to_drop,
+			       const char *preferred_pack_name,
+			       const char *refs_snapshot,
+			       unsigned flags);
+
 #define MIDX_SIGNATURE 0x4d494458 /* "MIDX" */
 #define MIDX_VERSION 1
 #define MIDX_BYTE_FILE_VERSION 4
@@ -1347,7 +1357,7 @@ static int write_midx_bitmap(const char *midx_name,
 	return ret;
 }
 
-static struct multi_pack_index *lookup_multi_pack_index(struct repository *r,
+struct multi_pack_index *lookup_multi_pack_index(struct repository *r,
 							const char *object_dir)
 {
 	struct multi_pack_index *result = NULL;
@@ -1372,12 +1382,12 @@ static struct multi_pack_index *lookup_multi_pack_index(struct repository *r,
 	return result;
 }
 
-static int write_midx_internal(const char *object_dir,
-			       struct string_list *packs_to_include,
-			       struct string_list *packs_to_drop,
-			       const char *preferred_pack_name,
-			       const char *refs_snapshot,
-			       unsigned flags)
+int write_midx_internal(const char *object_dir,
+			struct string_list *packs_to_include,
+			struct string_list *packs_to_drop,
+			const char *preferred_pack_name,
+			const char *refs_snapshot,
+			unsigned flags)
 {
 	struct strbuf midx_name = STRBUF_INIT;
 	unsigned char midx_hash[GIT_MAX_RAWSZ];
-- 
2.44.0.290.g736be63234b