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Commit | Line | Data |
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2636f614 | 1 | #include "cache.h" |
8f1d2e6f | 2 | #include "tag.h" |
0ab17950 NP |
3 | #include "commit.h" |
4 | #include "tree.h" | |
5 | #include "blob.h" | |
2636f614 | 6 | |
ac58c4c7 | 7 | #define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----" |
3d5854e7 | 8 | #define PGP_MESSAGE "-----BEGIN PGP MESSAGE-----" |
ac58c4c7 | 9 | |
2636f614 DB |
10 | const char *tag_type = "tag"; |
11 | ||
9534f40b | 12 | struct object *deref_tag(struct object *o, const char *warn, int warnlen) |
37fde874 | 13 | { |
1974632c | 14 | while (o && o->type == OBJ_TAG) |
24e8a3c9 MK |
15 | if (((struct tag *)o)->tagged) |
16 | o = parse_object(((struct tag *)o)->tagged->sha1); | |
17 | else | |
18 | o = NULL; | |
9534f40b JH |
19 | if (!o && warn) { |
20 | if (!warnlen) | |
21 | warnlen = strlen(warn); | |
22 | error("missing object referenced by '%.*s'", warnlen, warn); | |
23 | } | |
37fde874 JH |
24 | return o; |
25 | } | |
26 | ||
90108a24 JK |
27 | struct object *deref_tag_noverify(struct object *o) |
28 | { | |
29 | while (o && o->type == OBJ_TAG) { | |
30 | o = parse_object(o->sha1); | |
31 | if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged) | |
32 | o = ((struct tag *)o)->tagged; | |
33 | else | |
34 | o = NULL; | |
35 | } | |
36 | return o; | |
37 | } | |
38 | ||
5d6ccf5c | 39 | struct tag *lookup_tag(const unsigned char *sha1) |
2636f614 | 40 | { |
100c5f3b LT |
41 | struct object *obj = lookup_object(sha1); |
42 | if (!obj) | |
d36f51c1 | 43 | return create_object(sha1, alloc_tag_node()); |
8ff226a9 | 44 | return object_as_type(obj, OBJ_TAG, 0); |
2636f614 DB |
45 | } |
46 | ||
e451d06b SP |
47 | static unsigned long parse_tag_date(const char *buf, const char *tail) |
48 | { | |
49 | const char *dateptr; | |
50 | ||
51 | while (buf < tail && *buf++ != '>') | |
52 | /* nada */; | |
53 | if (buf >= tail) | |
54 | return 0; | |
55 | dateptr = buf; | |
56 | while (buf < tail && *buf++ != '\n') | |
57 | /* nada */; | |
58 | if (buf >= tail) | |
59 | return 0; | |
60 | /* dateptr < buf && buf[-1] == '\n', so strtoul will stop at buf-1 */ | |
61 | return strtoul(dateptr, NULL, 10); | |
62 | } | |
63 | ||
cf7b1cad | 64 | int parse_tag_buffer(struct tag *item, const void *data, unsigned long size) |
2636f614 | 65 | { |
0ab17950 | 66 | unsigned char sha1[20]; |
89e4202f | 67 | char type[20]; |
28de5b6b SP |
68 | const char *bufptr = data; |
69 | const char *tail = bufptr + size; | |
70 | const char *nl; | |
ae200ee5 | 71 | |
2e0052a5 SP |
72 | if (item->object.parsed) |
73 | return 0; | |
74 | item->object.parsed = 1; | |
2636f614 | 75 | |
2636f614 | 76 | if (size < 64) |
bd2c39f5 | 77 | return -1; |
28de5b6b | 78 | if (memcmp("object ", bufptr, 7) || get_sha1_hex(bufptr + 7, sha1) || bufptr[47] != '\n') |
bd2c39f5 | 79 | return -1; |
28de5b6b | 80 | bufptr += 48; /* "object " + sha1 + "\n" */ |
2636f614 | 81 | |
59556548 | 82 | if (!starts_with(bufptr, "type ")) |
bd2c39f5 | 83 | return -1; |
28de5b6b SP |
84 | bufptr += 5; |
85 | nl = memchr(bufptr, '\n', tail - bufptr); | |
86 | if (!nl || sizeof(type) <= (nl - bufptr)) | |
bd2c39f5 | 87 | return -1; |
28de5b6b SP |
88 | strncpy(type, bufptr, nl - bufptr); |
89 | type[nl - bufptr] = '\0'; | |
90 | bufptr = nl + 1; | |
2636f614 | 91 | |
0ab17950 NP |
92 | if (!strcmp(type, blob_type)) { |
93 | item->tagged = &lookup_blob(sha1)->object; | |
94 | } else if (!strcmp(type, tree_type)) { | |
95 | item->tagged = &lookup_tree(sha1)->object; | |
96 | } else if (!strcmp(type, commit_type)) { | |
97 | item->tagged = &lookup_commit(sha1)->object; | |
98 | } else if (!strcmp(type, tag_type)) { | |
99 | item->tagged = &lookup_tag(sha1)->object; | |
100 | } else { | |
101 | error("Unknown type %s", type); | |
102 | item->tagged = NULL; | |
103 | } | |
104 | ||
59556548 | 105 | if (bufptr + 4 < tail && starts_with(bufptr, "tag ")) |
85594252 NTND |
106 | ; /* good */ |
107 | else | |
28de5b6b SP |
108 | return -1; |
109 | bufptr += 4; | |
110 | nl = memchr(bufptr, '\n', tail - bufptr); | |
111 | if (!nl) | |
112 | return -1; | |
113 | item->tag = xmemdupz(bufptr, nl - bufptr); | |
114 | bufptr = nl + 1; | |
115 | ||
59556548 | 116 | if (bufptr + 7 < tail && starts_with(bufptr, "tagger ")) |
e451d06b SP |
117 | item->date = parse_tag_date(bufptr, tail); |
118 | else | |
119 | item->date = 0; | |
120 | ||
2636f614 | 121 | return 0; |
bd2c39f5 | 122 | } |
13019d41 | 123 | |
bd2c39f5 NP |
124 | int parse_tag(struct tag *item) |
125 | { | |
21666f1a | 126 | enum object_type type; |
bd2c39f5 NP |
127 | void *data; |
128 | unsigned long size; | |
129 | int ret; | |
130 | ||
131 | if (item->object.parsed) | |
132 | return 0; | |
21666f1a | 133 | data = read_sha1_file(item->object.sha1, &type, &size); |
bd2c39f5 NP |
134 | if (!data) |
135 | return error("Could not read %s", | |
136 | sha1_to_hex(item->object.sha1)); | |
21666f1a | 137 | if (type != OBJ_TAG) { |
bd2c39f5 NP |
138 | free(data); |
139 | return error("Object %s not a tag", | |
140 | sha1_to_hex(item->object.sha1)); | |
141 | } | |
142 | ret = parse_tag_buffer(item, data, size); | |
13019d41 | 143 | free(data); |
bd2c39f5 | 144 | return ret; |
2636f614 | 145 | } |
ac58c4c7 | 146 | |
2f47eae2 JH |
147 | /* |
148 | * Look at a signed tag object, and return the offset where | |
149 | * the embedded detached signature begins, or the end of the | |
150 | * data when there is no such signature. | |
151 | */ | |
ac58c4c7 MG |
152 | size_t parse_signature(const char *buf, unsigned long size) |
153 | { | |
154 | char *eol; | |
155 | size_t len = 0; | |
59556548 CC |
156 | while (len < size && !starts_with(buf + len, PGP_SIGNATURE) && |
157 | !starts_with(buf + len, PGP_MESSAGE)) { | |
ac58c4c7 MG |
158 | eol = memchr(buf + len, '\n', size - len); |
159 | len += eol ? eol - (buf + len) + 1 : size - len; | |
160 | } | |
161 | return len; | |
162 | } |