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Commit | Line | Data |
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68095570 | 1 | #include "cache.h" |
41771fa4 | 2 | #include "hex.h" |
f37b9bc0 | 3 | #include "oidmap.h" |
d88f9fdf SB |
4 | #include "object-store.h" |
5 | #include "replace-object.h" | |
68095570 | 6 | #include "refs.h" |
d88f9fdf | 7 | #include "repository.h" |
c2e86add | 8 | #include "commit.h" |
68095570 | 9 | |
212e0f7e SB |
10 | static int register_replace_ref(struct repository *r, |
11 | const char *refname, | |
00530834 | 12 | const struct object_id *oid, |
5cf88fd8 ÆAB |
13 | int flag UNUSED, |
14 | void *cb_data UNUSED) | |
68095570 CC |
15 | { |
16 | /* Get sha1 from refname */ | |
17 | const char *slash = strrchr(refname, '/'); | |
18 | const char *hash = slash ? slash + 1 : refname; | |
19 | struct replace_object *repl_obj = xmalloc(sizeof(*repl_obj)); | |
20 | ||
f37b9bc0 | 21 | if (get_oid_hex(hash, &repl_obj->original.oid)) { |
68095570 | 22 | free(repl_obj); |
b73c6e3a | 23 | warning(_("bad replace ref name: %s"), refname); |
68095570 CC |
24 | return 0; |
25 | } | |
26 | ||
27 | /* Copy sha1 from the read ref */ | |
1731a1e2 | 28 | oidcpy(&repl_obj->replacement, oid); |
68095570 CC |
29 | |
30 | /* Register new object */ | |
212e0f7e | 31 | if (oidmap_put(r->objects->replace_map, repl_obj)) |
b73c6e3a | 32 | die(_("duplicate replace ref: %s"), refname); |
68095570 CC |
33 | |
34 | return 0; | |
35 | } | |
36 | ||
d6538246 | 37 | void prepare_replace_object(struct repository *r) |
68095570 | 38 | { |
b1fc9da1 | 39 | if (r->objects->replace_map_initialized) |
68095570 CC |
40 | return; |
41 | ||
b1fc9da1 MT |
42 | pthread_mutex_lock(&r->objects->replace_mutex); |
43 | if (r->objects->replace_map_initialized) { | |
44 | pthread_mutex_unlock(&r->objects->replace_mutex); | |
45 | return; | |
46 | } | |
47 | ||
5982da9d | 48 | r->objects->replace_map = |
74fd0705 | 49 | xmalloc(sizeof(*r->objects->replace_map)); |
5982da9d | 50 | oidmap_init(r->objects->replace_map, 0); |
c1274495 | 51 | |
5982da9d | 52 | for_each_replace_ref(r, register_replace_ref, NULL); |
b1fc9da1 MT |
53 | r->objects->replace_map_initialized = 1; |
54 | ||
55 | pthread_mutex_unlock(&r->objects->replace_mutex); | |
68095570 CC |
56 | } |
57 | ||
58 | /* We allow "recursive" replacement. Only within reason, though */ | |
59 | #define MAXREPLACEDEPTH 5 | |
60 | ||
1f91e79c | 61 | /* |
b383a13c | 62 | * If a replacement for object oid has been set up, return the |
1f91e79c | 63 | * replacement object's name (replaced recursively, if necessary). |
b383a13c | 64 | * The return value is either oid or a pointer to a |
1f91e79c | 65 | * permanently-allocated value. This function always respects replace |
6ebd1caf | 66 | * references, regardless of the value of read_replace_refs. |
1f91e79c | 67 | */ |
5643557e SB |
68 | const struct object_id *do_lookup_replace_object(struct repository *r, |
69 | const struct object_id *oid) | |
68095570 | 70 | { |
f37b9bc0 | 71 | int depth = MAXREPLACEDEPTH; |
b383a13c | 72 | const struct object_id *cur = oid; |
68095570 | 73 | |
5643557e | 74 | prepare_replace_object(r); |
68095570 CC |
75 | |
76 | /* Try to recursively replace the object */ | |
f37b9bc0 | 77 | while (depth-- > 0) { |
d88f9fdf | 78 | struct replace_object *repl_obj = |
5643557e | 79 | oidmap_get(r->objects->replace_map, cur); |
f37b9bc0 RS |
80 | if (!repl_obj) |
81 | return cur; | |
82 | cur = &repl_obj->replacement; | |
83 | } | |
b73c6e3a | 84 | die(_("replace depth too high for object %s"), oid_to_hex(oid)); |
68095570 | 85 | } |