[PATCH 04/11] midx: move `expire_midx_packs` to midx-write.c

[Taylor Blau <me@ttaylorr.com>]

Move `expire_midx_packs()`, the main function which implements the
sub-command 'git multi-pack-index expire' into midx-write.c.

Similar to the previous patch, this patch does not introduce any
behavioral changes and is best viewed with `--color-moved`.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 midx-write.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 midx.c       | 57 ---------------------------------------------------
 2 files changed, 58 insertions(+), 57 deletions(-)

diff --git a/midx-write.c b/midx-write.c
index 6dd58be7e0..d679e0a131 100644
--- a/midx-write.c
+++ b/midx-write.c
@@ -3,6 +3,7 @@
 #include "hex.h"
 #include "packfile.h"
 #include "midx.h"
+#include "progress.h"
 #include "run-command.h"
 #include "pack-bitmap.h"
 #include "revision.h"
@@ -17,6 +18,63 @@ extern int write_midx_internal(const char *object_dir,
 extern struct multi_pack_index *lookup_multi_pack_index(struct repository *r,
 							const char *object_dir);
 
+int expire_midx_packs(struct repository *r, const char *object_dir, unsigned flags)
+{
+	uint32_t i, *count, result = 0;
+	struct string_list packs_to_drop = STRING_LIST_INIT_DUP;
+	struct multi_pack_index *m = lookup_multi_pack_index(r, object_dir);
+	struct progress *progress = NULL;
+
+	if (!m)
+		return 0;
+
+	CALLOC_ARRAY(count, m->num_packs);
+
+	if (flags & MIDX_PROGRESS)
+		progress = start_delayed_progress(_("Counting referenced objects"),
+					  m->num_objects);
+	for (i = 0; i < m->num_objects; i++) {
+		int pack_int_id = nth_midxed_pack_int_id(m, i);
+		count[pack_int_id]++;
+		display_progress(progress, i + 1);
+	}
+	stop_progress(&progress);
+
+	if (flags & MIDX_PROGRESS)
+		progress = start_delayed_progress(_("Finding and deleting unreferenced packfiles"),
+					  m->num_packs);
+	for (i = 0; i < m->num_packs; i++) {
+		char *pack_name;
+		display_progress(progress, i + 1);
+
+		if (count[i])
+			continue;
+
+		if (prepare_midx_pack(r, m, i))
+			continue;
+
+		if (m->packs[i]->pack_keep || m->packs[i]->is_cruft)
+			continue;
+
+		pack_name = xstrdup(m->packs[i]->pack_name);
+		close_pack(m->packs[i]);
+
+		string_list_insert(&packs_to_drop, m->pack_names[i]);
+		unlink_pack_path(pack_name, 0);
+		free(pack_name);
+	}
+	stop_progress(&progress);
+
+	free(count);
+
+	if (packs_to_drop.nr)
+		result = write_midx_internal(object_dir, NULL, &packs_to_drop, NULL, NULL, flags);
+
+	string_list_clear(&packs_to_drop, 0);
+
+	return result;
+}
+
 struct repack_info {
 	timestamp_t mtime;
 	uint32_t referenced_objects;
diff --git a/midx.c b/midx.c
index 3bd8c58642..5936bc5b9e 100644
--- a/midx.c
+++ b/midx.c
@@ -1998,60 +1998,3 @@ int verify_midx_file(struct repository *r, const char *object_dir, unsigned flag
 
 	return verify_midx_error;
 }
-
-int expire_midx_packs(struct repository *r, const char *object_dir, unsigned flags)
-{
-	uint32_t i, *count, result = 0;
-	struct string_list packs_to_drop = STRING_LIST_INIT_DUP;
-	struct multi_pack_index *m = lookup_multi_pack_index(r, object_dir);
-	struct progress *progress = NULL;
-
-	if (!m)
-		return 0;
-
-	CALLOC_ARRAY(count, m->num_packs);
-
-	if (flags & MIDX_PROGRESS)
-		progress = start_delayed_progress(_("Counting referenced objects"),
-					  m->num_objects);
-	for (i = 0; i < m->num_objects; i++) {
-		int pack_int_id = nth_midxed_pack_int_id(m, i);
-		count[pack_int_id]++;
-		display_progress(progress, i + 1);
-	}
-	stop_progress(&progress);
-
-	if (flags & MIDX_PROGRESS)
-		progress = start_delayed_progress(_("Finding and deleting unreferenced packfiles"),
-					  m->num_packs);
-	for (i = 0; i < m->num_packs; i++) {
-		char *pack_name;
-		display_progress(progress, i + 1);
-
-		if (count[i])
-			continue;
-
-		if (prepare_midx_pack(r, m, i))
-			continue;
-
-		if (m->packs[i]->pack_keep || m->packs[i]->is_cruft)
-			continue;
-
-		pack_name = xstrdup(m->packs[i]->pack_name);
-		close_pack(m->packs[i]);
-
-		string_list_insert(&packs_to_drop, m->pack_names[i]);
-		unlink_pack_path(pack_name, 0);
-		free(pack_name);
-	}
-	stop_progress(&progress);
-
-	free(count);
-
-	if (packs_to_drop.nr)
-		result = write_midx_internal(object_dir, NULL, &packs_to_drop, NULL, NULL, flags);
-
-	string_list_clear(&packs_to_drop, 0);
-
-	return result;
-}
-- 
2.44.0.290.g736be63234b