commit: add repository argument to lookup_commit_reference
[git/git.git] / tag.c
CommitLineData
2636f614 1#include "cache.h"
8f1d2e6f 2#include "tag.h"
cbd53a21 3#include "object-store.h"
0ab17950
NP
4#include "commit.h"
5#include "tree.h"
6#include "blob.h"
14ba97f8 7#include "alloc.h"
94240b91 8#include "gpg-interface.h"
2636f614
DB
9
10const char *tag_type = "tag";
11
45a227ef
ST
12static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags)
13{
14 struct signature_check sigc;
15 size_t payload_size;
16 int ret;
17
18 memset(&sigc, 0, sizeof(sigc));
19
20 payload_size = parse_signature(buf, size);
21
22 if (size == payload_size) {
23 if (flags & GPG_VERIFY_VERBOSE)
24 write_in_full(1, buf, payload_size);
25 return error("no signature found");
26 }
27
28 ret = check_signature(buf, payload_size, buf + payload_size,
29 size - payload_size, &sigc);
94240b91
LP
30
31 if (!(flags & GPG_VERIFY_OMIT_STATUS))
32 print_signature_buffer(&sigc, flags);
45a227ef
ST
33
34 signature_check_clear(&sigc);
35 return ret;
36}
37
84571760 38int gpg_verify_tag(const struct object_id *oid, const char *name_to_report,
45a227ef
ST
39 unsigned flags)
40{
41 enum object_type type;
42 char *buf;
43 unsigned long size;
44 int ret;
45
0df8e965 46 type = oid_object_info(the_repository, oid, NULL);
45a227ef
ST
47 if (type != OBJ_TAG)
48 return error("%s: cannot verify a non-tag object of type %s.",
49 name_to_report ?
50 name_to_report :
aab9583f 51 find_unique_abbrev(oid, DEFAULT_ABBREV),
debca9d2 52 type_name(type));
45a227ef 53
b4f5aca4 54 buf = read_object_file(oid, &type, &size);
45a227ef
ST
55 if (!buf)
56 return error("%s: unable to read file.",
57 name_to_report ?
58 name_to_report :
aab9583f 59 find_unique_abbrev(oid, DEFAULT_ABBREV));
45a227ef
ST
60
61 ret = run_gpg_verify(buf, size, flags);
62
63 free(buf);
64 return ret;
65}
66
9534f40b 67struct object *deref_tag(struct object *o, const char *warn, int warnlen)
37fde874 68{
1974632c 69 while (o && o->type == OBJ_TAG)
24e8a3c9 70 if (((struct tag *)o)->tagged)
109cd76d
SB
71 o = parse_object(the_repository,
72 &((struct tag *)o)->tagged->oid);
24e8a3c9
MK
73 else
74 o = NULL;
9534f40b
JH
75 if (!o && warn) {
76 if (!warnlen)
77 warnlen = strlen(warn);
78 error("missing object referenced by '%.*s'", warnlen, warn);
79 }
37fde874
JH
80 return o;
81}
82
90108a24
JK
83struct object *deref_tag_noverify(struct object *o)
84{
85 while (o && o->type == OBJ_TAG) {
109cd76d 86 o = parse_object(the_repository, &o->oid);
90108a24
JK
87 if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged)
88 o = ((struct tag *)o)->tagged;
89 else
90 o = NULL;
91 }
92 return o;
93}
94
d3101b53 95struct tag *lookup_tag(const struct object_id *oid)
2636f614 96{
5abddd1e 97 struct object *obj = lookup_object(the_repository, oid->hash);
100c5f3b 98 if (!obj)
68f95d38 99 return create_object(the_repository, oid->hash,
a0bd9086 100 alloc_tag_node(the_repository));
1268dfac 101 return object_as_type(the_repository, obj, OBJ_TAG, 0);
2636f614
DB
102}
103
dddbad72 104static timestamp_t parse_tag_date(const char *buf, const char *tail)
e451d06b
SP
105{
106 const char *dateptr;
107
108 while (buf < tail && *buf++ != '>')
109 /* nada */;
110 if (buf >= tail)
111 return 0;
112 dateptr = buf;
113 while (buf < tail && *buf++ != '\n')
114 /* nada */;
115 if (buf >= tail)
116 return 0;
1aeb7e75
JS
117 /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */
118 return parse_timestamp(dateptr, NULL, 10);
e451d06b
SP
119}
120
14ba97f8
SB
121void release_tag_memory(struct tag *t)
122{
123 free(t->tag);
124 t->tagged = NULL;
125 t->object.parsed = 0;
126 t->date = 0;
127}
128
cf7b1cad 129int parse_tag_buffer(struct tag *item, const void *data, unsigned long size)
2636f614 130{
1e4085a0 131 struct object_id oid;
89e4202f 132 char type[20];
28de5b6b
SP
133 const char *bufptr = data;
134 const char *tail = bufptr + size;
135 const char *nl;
ae200ee5 136
2e0052a5
SP
137 if (item->object.parsed)
138 return 0;
139 item->object.parsed = 1;
2636f614 140
1e4085a0 141 if (size < GIT_SHA1_HEXSZ + 24)
bd2c39f5 142 return -1;
1e4085a0 143 if (memcmp("object ", bufptr, 7) || parse_oid_hex(bufptr + 7, &oid, &bufptr) || *bufptr++ != '\n')
bd2c39f5 144 return -1;
2636f614 145
59556548 146 if (!starts_with(bufptr, "type "))
bd2c39f5 147 return -1;
28de5b6b
SP
148 bufptr += 5;
149 nl = memchr(bufptr, '\n', tail - bufptr);
150 if (!nl || sizeof(type) <= (nl - bufptr))
bd2c39f5 151 return -1;
eddda371 152 memcpy(type, bufptr, nl - bufptr);
28de5b6b
SP
153 type[nl - bufptr] = '\0';
154 bufptr = nl + 1;
2636f614 155
0ab17950 156 if (!strcmp(type, blob_type)) {
da14a7ff 157 item->tagged = (struct object *)lookup_blob(the_repository, &oid);
0ab17950 158 } else if (!strcmp(type, tree_type)) {
f86bcc7b 159 item->tagged = (struct object *)lookup_tree(the_repository, &oid);
0ab17950 160 } else if (!strcmp(type, commit_type)) {
7099153e 161 item->tagged = (struct object *)lookup_commit(&oid);
0ab17950 162 } else if (!strcmp(type, tag_type)) {
7099153e 163 item->tagged = (struct object *)lookup_tag(&oid);
0ab17950
NP
164 } else {
165 error("Unknown type %s", type);
166 item->tagged = NULL;
167 }
168
59556548 169 if (bufptr + 4 < tail && starts_with(bufptr, "tag "))
85594252
NTND
170 ; /* good */
171 else
28de5b6b
SP
172 return -1;
173 bufptr += 4;
174 nl = memchr(bufptr, '\n', tail - bufptr);
175 if (!nl)
176 return -1;
177 item->tag = xmemdupz(bufptr, nl - bufptr);
178 bufptr = nl + 1;
179
59556548 180 if (bufptr + 7 < tail && starts_with(bufptr, "tagger "))
e451d06b
SP
181 item->date = parse_tag_date(bufptr, tail);
182 else
183 item->date = 0;
184
2636f614 185 return 0;
bd2c39f5 186}
13019d41 187
bd2c39f5
NP
188int parse_tag(struct tag *item)
189{
21666f1a 190 enum object_type type;
bd2c39f5
NP
191 void *data;
192 unsigned long size;
193 int ret;
194
195 if (item->object.parsed)
196 return 0;
b4f5aca4 197 data = read_object_file(&item->object.oid, &type, &size);
bd2c39f5
NP
198 if (!data)
199 return error("Could not read %s",
f2fd0760 200 oid_to_hex(&item->object.oid));
21666f1a 201 if (type != OBJ_TAG) {
bd2c39f5
NP
202 free(data);
203 return error("Object %s not a tag",
f2fd0760 204 oid_to_hex(&item->object.oid));
bd2c39f5
NP
205 }
206 ret = parse_tag_buffer(item, data, size);
13019d41 207 free(data);
bd2c39f5 208 return ret;
2636f614 209}