[PATCH 07/26] pack: move approximate object count to object store

[Stefan Beller <sbeller@xxxxxxxxxx>]

From: Jonathan Nieder <jrnieder@xxxxxxxxx>

The approximate_object_count() function maintains a rough count of
objects in a repository to estimate how long object name abbreviates
should be.  Object names are scoped to a repository and the
appropriate length may differ by repository, so the object count
should not be global.

Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
---
 object-store.h | 10 +++++++++-
 packfile.c     | 11 +++++------
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/object-store.h b/object-store.h
index 9fd109fa9c..86f1ec2cd0 100644
--- a/object-store.h
+++ b/object-store.h
@@ -21,13 +21,21 @@ struct raw_object_store {
 	struct alternate_object_database *alt_odb_list;
 	struct alternate_object_database **alt_odb_tail;
 
+	/*
+	 * A fast, rough count of the number of objects in the repository.
+	 * These two fields are not meant for direct access. Use
+	 * approximate_object_count() instead.
+	 */
+	unsigned long approximate_object_count;
+	unsigned approximate_object_count_valid : 1;
+
 	/*
 	 * Whether packed_git has already been populated with this repository's
 	 * packs.
 	 */
 	unsigned packed_git_initialized : 1;
 };
-#define RAW_OBJECT_STORE_INIT { NULL, NULL, MRU_INIT, NULL, NULL, 0 }
+#define RAW_OBJECT_STORE_INIT { NULL, NULL, MRU_INIT, NULL, NULL, 0, 0, 0 }
 
 void raw_object_store_clear(struct raw_object_store *o);
 
diff --git a/packfile.c b/packfile.c
index c107fce171..a53706cf16 100644
--- a/packfile.c
+++ b/packfile.c
@@ -793,8 +793,6 @@ static void prepare_packed_git_one(char *objdir, int local)
 	strbuf_release(&path);
 }
 
-static int approximate_object_count_valid;
-
 /*
  * Give a fast, rough count of the number of objects in the repository. This
  * ignores loose objects completely. If you have a lot of them, then either
@@ -804,8 +802,8 @@ static int approximate_object_count_valid;
  */
 unsigned long approximate_object_count(void)
 {
-	static unsigned long count;
-	if (!approximate_object_count_valid) {
+	if (!the_repository->objects.approximate_object_count_valid) {
+		unsigned long count;
 		struct packed_git *p;
 
 		prepare_packed_git();
@@ -815,8 +813,9 @@ unsigned long approximate_object_count(void)
 				continue;
 			count += p->num_objects;
 		}
+		the_repository->objects.approximate_object_count = count;
 	}
-	return count;
+	return the_repository->objects.approximate_object_count;
 }
 
 static void *get_next_packed_git(const void *p)
@@ -890,7 +889,7 @@ void prepare_packed_git(void)
 
 void reprepare_packed_git(void)
 {
-	approximate_object_count_valid = 0;
+	the_repository->objects.approximate_object_count_valid = 0;
 	the_repository->objects.packed_git_initialized = 0;
 	prepare_packed_git();
 }
-- 
2.16.1.73.ga2c3e9663f.dirty