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Commit | Line | Data |
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4f6728d5 | 1 | #include "git-compat-util.h" |
f394e093 | 2 | #include "gettext.h" |
41771fa4 | 3 | #include "hex.h" |
f37b9bc0 | 4 | #include "oidmap.h" |
d88f9fdf SB |
5 | #include "object-store.h" |
6 | #include "replace-object.h" | |
68095570 | 7 | #include "refs.h" |
d88f9fdf | 8 | #include "repository.h" |
c2e86add | 9 | #include "commit.h" |
68095570 | 10 | |
212e0f7e SB |
11 | static int register_replace_ref(struct repository *r, |
12 | const char *refname, | |
00530834 | 13 | const struct object_id *oid, |
5cf88fd8 ÆAB |
14 | int flag UNUSED, |
15 | void *cb_data UNUSED) | |
68095570 CC |
16 | { |
17 | /* Get sha1 from refname */ | |
18 | const char *slash = strrchr(refname, '/'); | |
19 | const char *hash = slash ? slash + 1 : refname; | |
20 | struct replace_object *repl_obj = xmalloc(sizeof(*repl_obj)); | |
21 | ||
f37b9bc0 | 22 | if (get_oid_hex(hash, &repl_obj->original.oid)) { |
68095570 | 23 | free(repl_obj); |
b73c6e3a | 24 | warning(_("bad replace ref name: %s"), refname); |
68095570 CC |
25 | return 0; |
26 | } | |
27 | ||
28 | /* Copy sha1 from the read ref */ | |
1731a1e2 | 29 | oidcpy(&repl_obj->replacement, oid); |
68095570 CC |
30 | |
31 | /* Register new object */ | |
212e0f7e | 32 | if (oidmap_put(r->objects->replace_map, repl_obj)) |
b73c6e3a | 33 | die(_("duplicate replace ref: %s"), refname); |
68095570 CC |
34 | |
35 | return 0; | |
36 | } | |
37 | ||
d6538246 | 38 | void prepare_replace_object(struct repository *r) |
68095570 | 39 | { |
b1fc9da1 | 40 | if (r->objects->replace_map_initialized) |
68095570 CC |
41 | return; |
42 | ||
b1fc9da1 MT |
43 | pthread_mutex_lock(&r->objects->replace_mutex); |
44 | if (r->objects->replace_map_initialized) { | |
45 | pthread_mutex_unlock(&r->objects->replace_mutex); | |
46 | return; | |
47 | } | |
48 | ||
5982da9d | 49 | r->objects->replace_map = |
74fd0705 | 50 | xmalloc(sizeof(*r->objects->replace_map)); |
5982da9d | 51 | oidmap_init(r->objects->replace_map, 0); |
c1274495 | 52 | |
5982da9d | 53 | for_each_replace_ref(r, register_replace_ref, NULL); |
b1fc9da1 MT |
54 | r->objects->replace_map_initialized = 1; |
55 | ||
56 | pthread_mutex_unlock(&r->objects->replace_mutex); | |
68095570 CC |
57 | } |
58 | ||
59 | /* We allow "recursive" replacement. Only within reason, though */ | |
60 | #define MAXREPLACEDEPTH 5 | |
61 | ||
1f91e79c | 62 | /* |
b383a13c | 63 | * If a replacement for object oid has been set up, return the |
1f91e79c | 64 | * replacement object's name (replaced recursively, if necessary). |
b383a13c | 65 | * The return value is either oid or a pointer to a |
1f91e79c | 66 | * permanently-allocated value. This function always respects replace |
6ebd1caf | 67 | * references, regardless of the value of read_replace_refs. |
1f91e79c | 68 | */ |
5643557e SB |
69 | const struct object_id *do_lookup_replace_object(struct repository *r, |
70 | const struct object_id *oid) | |
68095570 | 71 | { |
f37b9bc0 | 72 | int depth = MAXREPLACEDEPTH; |
b383a13c | 73 | const struct object_id *cur = oid; |
68095570 | 74 | |
5643557e | 75 | prepare_replace_object(r); |
68095570 CC |
76 | |
77 | /* Try to recursively replace the object */ | |
f37b9bc0 | 78 | while (depth-- > 0) { |
d88f9fdf | 79 | struct replace_object *repl_obj = |
5643557e | 80 | oidmap_get(r->objects->replace_map, cur); |
f37b9bc0 RS |
81 | if (!repl_obj) |
82 | return cur; | |
83 | cur = &repl_obj->replacement; | |
84 | } | |
b73c6e3a | 85 | die(_("replace depth too high for object %s"), oid_to_hex(oid)); |
68095570 | 86 | } |