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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 | |
212e0f7e SB |
9 | static int register_replace_ref(struct repository *r, |
10 | const char *refname, | |
00530834 | 11 | const struct object_id *oid, |
68095570 CC |
12 | int flag, void *cb_data) |
13 | { | |
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)); | |
18 | ||
f37b9bc0 | 19 | if (get_oid_hex(hash, &repl_obj->original.oid)) { |
68095570 | 20 | free(repl_obj); |
b73c6e3a | 21 | warning(_("bad replace ref name: %s"), refname); |
68095570 CC |
22 | return 0; |
23 | } | |
24 | ||
25 | /* Copy sha1 from the read ref */ | |
1731a1e2 | 26 | oidcpy(&repl_obj->replacement, oid); |
68095570 CC |
27 | |
28 | /* Register new object */ | |
212e0f7e | 29 | if (oidmap_put(r->objects->replace_map, repl_obj)) |
b73c6e3a | 30 | die(_("duplicate replace ref: %s"), refname); |
68095570 CC |
31 | |
32 | return 0; | |
33 | } | |
34 | ||
d6538246 | 35 | void prepare_replace_object(struct repository *r) |
68095570 | 36 | { |
5982da9d | 37 | if (r->objects->replace_map) |
68095570 CC |
38 | return; |
39 | ||
5982da9d | 40 | r->objects->replace_map = |
74fd0705 | 41 | xmalloc(sizeof(*r->objects->replace_map)); |
5982da9d | 42 | oidmap_init(r->objects->replace_map, 0); |
c1274495 | 43 | |
5982da9d | 44 | for_each_replace_ref(r, register_replace_ref, NULL); |
68095570 CC |
45 | } |
46 | ||
47 | /* We allow "recursive" replacement. Only within reason, though */ | |
48 | #define MAXREPLACEDEPTH 5 | |
49 | ||
1f91e79c | 50 | /* |
b383a13c | 51 | * If a replacement for object oid has been set up, return the |
1f91e79c | 52 | * replacement object's name (replaced recursively, if necessary). |
b383a13c | 53 | * The return value is either oid or a pointer to a |
1f91e79c | 54 | * permanently-allocated value. This function always respects replace |
6ebd1caf | 55 | * references, regardless of the value of read_replace_refs. |
1f91e79c | 56 | */ |
5643557e SB |
57 | const struct object_id *do_lookup_replace_object(struct repository *r, |
58 | const struct object_id *oid) | |
68095570 | 59 | { |
f37b9bc0 | 60 | int depth = MAXREPLACEDEPTH; |
b383a13c | 61 | const struct object_id *cur = oid; |
68095570 | 62 | |
5643557e | 63 | prepare_replace_object(r); |
68095570 CC |
64 | |
65 | /* Try to recursively replace the object */ | |
f37b9bc0 | 66 | while (depth-- > 0) { |
d88f9fdf | 67 | struct replace_object *repl_obj = |
5643557e | 68 | oidmap_get(r->objects->replace_map, cur); |
f37b9bc0 RS |
69 | if (!repl_obj) |
70 | return cur; | |
71 | cur = &repl_obj->replacement; | |
72 | } | |
b73c6e3a | 73 | die(_("replace depth too high for object %s"), oid_to_hex(oid)); |
68095570 | 74 | } |