Merge branch 'jk/branch-l-0-deprecation'
[alt-git.git] / tag.c
blob3be7206e92063d4f4f561488e2203a5edd18760d
1 #include "cache.h"
2 #include "tag.h"
3 #include "object-store.h"
4 #include "commit.h"
5 #include "tree.h"
6 #include "blob.h"
7 #include "alloc.h"
8 #include "gpg-interface.h"
10 const char *tag_type = "tag";
12 static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags)
14 struct signature_check sigc;
15 size_t payload_size;
16 int ret;
18 memset(&sigc, 0, sizeof(sigc));
20 payload_size = parse_signature(buf, size);
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");
28 ret = check_signature(buf, payload_size, buf + payload_size,
29 size - payload_size, &sigc);
31 if (!(flags & GPG_VERIFY_OMIT_STATUS))
32 print_signature_buffer(&sigc, flags);
34 signature_check_clear(&sigc);
35 return ret;
38 int gpg_verify_tag(const struct object_id *oid, const char *name_to_report,
39 unsigned flags)
41 enum object_type type;
42 char *buf;
43 unsigned long size;
44 int ret;
46 type = oid_object_info(the_repository, oid, NULL);
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 :
51 find_unique_abbrev(oid, DEFAULT_ABBREV),
52 type_name(type));
54 buf = read_object_file(oid, &type, &size);
55 if (!buf)
56 return error("%s: unable to read file.",
57 name_to_report ?
58 name_to_report :
59 find_unique_abbrev(oid, DEFAULT_ABBREV));
61 ret = run_gpg_verify(buf, size, flags);
63 free(buf);
64 return ret;
67 struct object *deref_tag(struct object *o, const char *warn, int warnlen)
69 while (o && o->type == OBJ_TAG)
70 if (((struct tag *)o)->tagged)
71 o = parse_object(&((struct tag *)o)->tagged->oid);
72 else
73 o = NULL;
74 if (!o && warn) {
75 if (!warnlen)
76 warnlen = strlen(warn);
77 error("missing object referenced by '%.*s'", warnlen, warn);
79 return o;
82 struct object *deref_tag_noverify(struct object *o)
84 while (o && o->type == OBJ_TAG) {
85 o = parse_object(&o->oid);
86 if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged)
87 o = ((struct tag *)o)->tagged;
88 else
89 o = NULL;
91 return o;
94 struct tag *lookup_tag(const struct object_id *oid)
96 struct object *obj = lookup_object(oid->hash);
97 if (!obj)
98 return create_object(the_repository, oid->hash,
99 alloc_tag_node(the_repository));
100 return object_as_type(obj, OBJ_TAG, 0);
103 static timestamp_t parse_tag_date(const char *buf, const char *tail)
105 const char *dateptr;
107 while (buf < tail && *buf++ != '>')
108 /* nada */;
109 if (buf >= tail)
110 return 0;
111 dateptr = buf;
112 while (buf < tail && *buf++ != '\n')
113 /* nada */;
114 if (buf >= tail)
115 return 0;
116 /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */
117 return parse_timestamp(dateptr, NULL, 10);
120 void release_tag_memory(struct tag *t)
122 free(t->tag);
123 t->tagged = NULL;
124 t->object.parsed = 0;
125 t->date = 0;
128 int parse_tag_buffer(struct tag *item, const void *data, unsigned long size)
130 struct object_id oid;
131 char type[20];
132 const char *bufptr = data;
133 const char *tail = bufptr + size;
134 const char *nl;
136 if (item->object.parsed)
137 return 0;
138 item->object.parsed = 1;
140 if (size < GIT_SHA1_HEXSZ + 24)
141 return -1;
142 if (memcmp("object ", bufptr, 7) || parse_oid_hex(bufptr + 7, &oid, &bufptr) || *bufptr++ != '\n')
143 return -1;
145 if (!starts_with(bufptr, "type "))
146 return -1;
147 bufptr += 5;
148 nl = memchr(bufptr, '\n', tail - bufptr);
149 if (!nl || sizeof(type) <= (nl - bufptr))
150 return -1;
151 memcpy(type, bufptr, nl - bufptr);
152 type[nl - bufptr] = '\0';
153 bufptr = nl + 1;
155 if (!strcmp(type, blob_type)) {
156 item->tagged = (struct object *)lookup_blob(&oid);
157 } else if (!strcmp(type, tree_type)) {
158 item->tagged = (struct object *)lookup_tree(&oid);
159 } else if (!strcmp(type, commit_type)) {
160 item->tagged = (struct object *)lookup_commit(&oid);
161 } else if (!strcmp(type, tag_type)) {
162 item->tagged = (struct object *)lookup_tag(&oid);
163 } else {
164 error("Unknown type %s", type);
165 item->tagged = NULL;
168 if (bufptr + 4 < tail && starts_with(bufptr, "tag "))
169 ; /* good */
170 else
171 return -1;
172 bufptr += 4;
173 nl = memchr(bufptr, '\n', tail - bufptr);
174 if (!nl)
175 return -1;
176 item->tag = xmemdupz(bufptr, nl - bufptr);
177 bufptr = nl + 1;
179 if (bufptr + 7 < tail && starts_with(bufptr, "tagger "))
180 item->date = parse_tag_date(bufptr, tail);
181 else
182 item->date = 0;
184 return 0;
187 int parse_tag(struct tag *item)
189 enum object_type type;
190 void *data;
191 unsigned long size;
192 int ret;
194 if (item->object.parsed)
195 return 0;
196 data = read_object_file(&item->object.oid, &type, &size);
197 if (!data)
198 return error("Could not read %s",
199 oid_to_hex(&item->object.oid));
200 if (type != OBJ_TAG) {
201 free(data);
202 return error("Object %s not a tag",
203 oid_to_hex(&item->object.oid));
205 ret = parse_tag_buffer(item, data, size);
206 free(data);
207 return ret;