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Commit | Line | Data |
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68095570 | 1 | #include "cache.h" |
f37b9bc0 | 2 | #include "oidmap.h" |
d88f9fdf SB |
3 | #include "object-store.h" |
4 | #include "replace-object.h" | |
68095570 | 5 | #include "refs.h" |
d88f9fdf | 6 | #include "repository.h" |
c2e86add | 7 | #include "commit.h" |
68095570 | 8 | |
68095570 | 9 | static int register_replace_ref(const char *refname, |
00530834 | 10 | const struct object_id *oid, |
68095570 CC |
11 | int flag, void *cb_data) |
12 | { | |
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)); | |
17 | ||
f37b9bc0 | 18 | if (get_oid_hex(hash, &repl_obj->original.oid)) { |
68095570 CC |
19 | free(repl_obj); |
20 | warning("bad replace ref name: %s", refname); | |
21 | return 0; | |
22 | } | |
23 | ||
24 | /* Copy sha1 from the read ref */ | |
1731a1e2 | 25 | oidcpy(&repl_obj->replacement, oid); |
68095570 CC |
26 | |
27 | /* Register new object */ | |
c1274495 | 28 | if (oidmap_put(the_repository->objects->replace_map, repl_obj)) |
68095570 CC |
29 | die("duplicate replace ref: %s", refname); |
30 | ||
31 | return 0; | |
32 | } | |
33 | ||
5982da9d | 34 | static void prepare_replace_object(struct repository *r) |
68095570 | 35 | { |
5982da9d | 36 | if (r->objects->replace_map) |
68095570 CC |
37 | return; |
38 | ||
5982da9d | 39 | r->objects->replace_map = |
74fd0705 | 40 | xmalloc(sizeof(*r->objects->replace_map)); |
5982da9d | 41 | oidmap_init(r->objects->replace_map, 0); |
c1274495 | 42 | |
5982da9d | 43 | for_each_replace_ref(r, register_replace_ref, NULL); |
68095570 CC |
44 | } |
45 | ||
46 | /* We allow "recursive" replacement. Only within reason, though */ | |
47 | #define MAXREPLACEDEPTH 5 | |
48 | ||
1f91e79c | 49 | /* |
b383a13c | 50 | * If a replacement for object oid has been set up, return the |
1f91e79c | 51 | * replacement object's name (replaced recursively, if necessary). |
b383a13c | 52 | * The return value is either oid or a pointer to a |
1f91e79c MH |
53 | * permanently-allocated value. This function always respects replace |
54 | * references, regardless of the value of check_replace_refs. | |
55 | */ | |
5643557e SB |
56 | const struct object_id *do_lookup_replace_object(struct repository *r, |
57 | const struct object_id *oid) | |
68095570 | 58 | { |
f37b9bc0 | 59 | int depth = MAXREPLACEDEPTH; |
b383a13c | 60 | const struct object_id *cur = oid; |
68095570 | 61 | |
5643557e | 62 | prepare_replace_object(r); |
68095570 CC |
63 | |
64 | /* Try to recursively replace the object */ | |
f37b9bc0 | 65 | while (depth-- > 0) { |
d88f9fdf | 66 | struct replace_object *repl_obj = |
5643557e | 67 | oidmap_get(r->objects->replace_map, cur); |
f37b9bc0 RS |
68 | if (!repl_obj) |
69 | return cur; | |
70 | cur = &repl_obj->replacement; | |
71 | } | |
72 | die("replace depth too high for object %s", oid_to_hex(oid)); | |
68095570 | 73 | } |