3 #include "object-store.h"
4 #include "replace-object.h"
6 #include "repository.h"
9 static int register_replace_ref(const char *refname
,
10 const struct object_id
*oid
,
11 int flag
, void *cb_data
)
13 /* Get sha1 from refname */
14 const char *slash
= strrchr(refname
, '/');
15 const char *hash
= slash
? slash
+ 1 : refname
;
16 struct replace_object
*repl_obj
= xmalloc(sizeof(*repl_obj
));
18 if (get_oid_hex(hash
, &repl_obj
->original
.oid
)) {
20 warning("bad replace ref name: %s", refname
);
24 /* Copy sha1 from the read ref */
25 oidcpy(&repl_obj
->replacement
, oid
);
27 /* Register new object */
28 if (oidmap_put(&the_repository
->objects
->replace_map
, repl_obj
))
29 die("duplicate replace ref: %s", refname
);
34 static void prepare_replace_object(void)
36 static int replace_object_prepared
;
38 if (replace_object_prepared
)
41 for_each_replace_ref(register_replace_ref
, NULL
);
42 replace_object_prepared
= 1;
43 if (!the_repository
->objects
->replace_map
.map
.tablesize
)
44 check_replace_refs
= 0;
47 /* We allow "recursive" replacement. Only within reason, though */
48 #define MAXREPLACEDEPTH 5
51 * If a replacement for object oid has been set up, return the
52 * replacement object's name (replaced recursively, if necessary).
53 * The return value is either oid or a pointer to a
54 * permanently-allocated value. This function always respects replace
55 * references, regardless of the value of check_replace_refs.
57 const struct object_id
*do_lookup_replace_object(const struct object_id
*oid
)
59 int depth
= MAXREPLACEDEPTH
;
60 const struct object_id
*cur
= oid
;
62 prepare_replace_object();
64 /* Try to recursively replace the object */
66 struct replace_object
*repl_obj
=
67 oidmap_get(&the_repository
->objects
->replace_map
, cur
);
70 cur
= &repl_obj
->replacement
;
72 die("replace depth too high for object %s", oid_to_hex(oid
));