Wire up a new `close()` callback for the packed source and call it from
the "files" source via the generic `odb_source_close()` interface.

Signed-off-by: Patrick Steinhardt <redacted>
---
 odb/source-files.c  |  2 +-
 odb/source-packed.c | 16 ++++++++++++++++
 packfile.c          | 12 ------------
 packfile.h          |  6 ------
 4 files changed, 17 insertions(+), 19 deletions(-)

diff --git a/odb/source-files.c b/odb/source-files.c
index 3608808e7c..9b0fa9ccdc 100644
--- a/odb/source-files.c
+++ b/odb/source-files.c

@@ -38,7 +38,7 @@ static void odb_source_files_close(struct odb_source *source)
 {
 	struct odb_source_files *files = odb_source_files_downcast(source);
 	odb_source_close(&files->loose->base);
-	packfile_store_close(files->packed);
+	odb_source_close(&files->packed->base);
 }

 static void odb_source_files_reprepare(struct odb_source *source)

diff --git a/odb/source-packed.c b/odb/source-packed.c
index f81a990cbd..74805be1dd 100644
--- a/odb/source-packed.c
+++ b/odb/source-packed.c

@@ -1,6 +1,7 @@
 #include "git-compat-util.h"
 #include "abspath.h"
 #include "chdir-notify.h"
+#include "midx.h"
 #include "odb/source-packed.h"
 #include "packfile.h"

@@ -16,6 +17,20 @@ static void odb_source_packed_reparent(const char *name UNUSED,
 	packed->base.path = path;
 }

+static void odb_source_packed_close(struct odb_source *source)
+{
+	struct odb_source_packed *packed = odb_source_packed_downcast(source);
+
+	for (struct packfile_list_entry *e = packed->packs.head; e; e = e->next) {
+		if (e->pack->do_not_close)
+			BUG("want to close pack marked 'do-not-close'");
+		close_pack(e->pack);
+	}
+	if (packed->midx)
+		close_midx(packed->midx);
+	packed->midx = NULL;
+}
+

 static void odb_source_packed_free(struct odb_source *source)
 {
 	struct odb_source_packed *packed = odb_source_packed_downcast(source);

@@ -42,6 +57,7 @@ struct odb_source_packed *odb_source_packed_new(struct odb_source_files *parent)
 	strmap_init(&packed->packs_by_path);

 	packed->base.free = odb_source_packed_free;
+	packed->base.close = odb_source_packed_close;