3 #include "object-store.h"
4 #include "replace-object.h"
6 #include "repository.h"
9 static int register_replace_ref(struct repository
*r
,
11 const struct object_id
*oid
,
12 int flag
, void *cb_data
)
14 /* Get sha1 from refname */
15 const char *slash
= strrchr(refname
, '/');
16 const char *hash
= slash
? slash
+ 1 : refname
;
17 struct replace_object
*repl_obj
= xmalloc(sizeof(*repl_obj
));
19 if (get_oid_hex(hash
, &repl_obj
->original
.oid
)) {
21 warning("bad replace ref name: %s", refname
);
25 /* Copy sha1 from the read ref */
26 oidcpy(&repl_obj
->replacement
, oid
);
28 /* Register new object */
29 if (oidmap_put(r
->objects
->replace_map
, repl_obj
))
30 die("duplicate replace ref: %s", refname
);
35 void prepare_replace_object(struct repository
*r
)
37 if (r
->objects
->replace_map
)
40 r
->objects
->replace_map
=
41 xmalloc(sizeof(*r
->objects
->replace_map
));
42 oidmap_init(r
->objects
->replace_map
, 0);
44 for_each_replace_ref(r
, register_replace_ref
, NULL
);
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 read_replace_refs.
57 const struct object_id
*do_lookup_replace_object(struct repository
*r
,
58 const struct object_id
*oid
)
60 int depth
= MAXREPLACEDEPTH
;
61 const struct object_id
*cur
= oid
;
63 prepare_replace_object(r
);
65 /* Try to recursively replace the object */
67 struct replace_object
*repl_obj
=
68 oidmap_get(r
->objects
->replace_map
, cur
);
71 cur
= &repl_obj
->replacement
;
73 die("replace depth too high for object %s", oid_to_hex(oid
));