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replace-object: move replace_map to object store

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The relationship between an object X and another object Y that
replaces the object X is defined only within the scope of a
single repository.

The exception in reachability rule around these replacement objects
is also local to a repository (i.e. if traversal from refs reaches
X, then both X and Y are reachable and need to be kept from gc).

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Stefan Beller
2018-04-11 17:21:05 -07:00
committed by Junio C Hamano
parent f37b9bc00c
commit d88f9fdf8b
3 changed files with 24 additions and 10 deletions
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17
replace_object.c
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@ -1,15 +1,11 @@
#include "cache.h"
#include "oidmap.h"
#include "object-store.h"
#include "replace-object.h"
#include "refs.h"
#include "repository.h"
#include "commit.h"
struct replace_object {
struct oidmap_entry original;
struct object_id replacement;
};
static struct oidmap replace_map = OIDMAP_INIT;
static int register_replace_ref(const char *refname,
const struct object_id *oid,
int flag, void *cb_data)
@ -29,7 +25,7 @@ static int register_replace_ref(const char *refname,
oidcpy(&repl_obj->replacement, oid);
/* Register new object */
if (oidmap_put(&replace_map, repl_obj))
if (oidmap_put(&the_repository->objects->replace_map, repl_obj))
die("duplicate replace ref: %s", refname);
return 0;
@ -44,7 +40,7 @@ static void prepare_replace_object(void)
for_each_replace_ref(register_replace_ref, NULL);
replace_object_prepared = 1;
if (!replace_map.map.tablesize)
if (!the_repository->objects->replace_map.map.tablesize)
check_replace_refs = 0;
}
@ -67,7 +63,8 @@ const struct object_id *do_lookup_replace_object(const struct object_id *oid)
/* Try to recursively replace the object */
while (depth-- > 0) {
struct replace_object *repl_obj = oidmap_get(&replace_map, cur);
struct replace_object *repl_obj =
oidmap_get(&the_repository->objects->replace_map, cur);
if (!repl_obj)
return cur;
cur = &repl_obj->replacement;