stash: teach 'push' (and 'create_stash') to honor pathspec
[git.git] / tag.c
blobd1dcd18cd7b53e21fa15bab9baad05cf16a3b9de
1 #include "cache.h"
2 #include "tag.h"
3 #include "commit.h"
4 #include "tree.h"
5 #include "blob.h"
7 const char *tag_type = "tag";
9 static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags)
11 struct signature_check sigc;
12 size_t payload_size;
13 int ret;
15 memset(&sigc, 0, sizeof(sigc));
17 payload_size = parse_signature(buf, size);
19 if (size == payload_size) {
20 if (flags & GPG_VERIFY_VERBOSE)
21 write_in_full(1, buf, payload_size);
22 return error("no signature found");
25 ret = check_signature(buf, payload_size, buf + payload_size,
26 size - payload_size, &sigc);
27 print_signature_buffer(&sigc, flags);
29 signature_check_clear(&sigc);
30 return ret;
33 int gpg_verify_tag(const unsigned char *sha1, const char *name_to_report,
34 unsigned flags)
36 enum object_type type;
37 char *buf;
38 unsigned long size;
39 int ret;
41 type = sha1_object_info(sha1, NULL);
42 if (type != OBJ_TAG)
43 return error("%s: cannot verify a non-tag object of type %s.",
44 name_to_report ?
45 name_to_report :
46 find_unique_abbrev(sha1, DEFAULT_ABBREV),
47 typename(type));
49 buf = read_sha1_file(sha1, &type, &size);
50 if (!buf)
51 return error("%s: unable to read file.",
52 name_to_report ?
53 name_to_report :
54 find_unique_abbrev(sha1, DEFAULT_ABBREV));
56 ret = run_gpg_verify(buf, size, flags);
58 free(buf);
59 return ret;
62 struct object *deref_tag(struct object *o, const char *warn, int warnlen)
64 while (o && o->type == OBJ_TAG)
65 if (((struct tag *)o)->tagged)
66 o = parse_object(((struct tag *)o)->tagged->oid.hash);
67 else
68 o = NULL;
69 if (!o && warn) {
70 if (!warnlen)
71 warnlen = strlen(warn);
72 error("missing object referenced by '%.*s'", warnlen, warn);
74 return o;
77 struct object *deref_tag_noverify(struct object *o)
79 while (o && o->type == OBJ_TAG) {
80 o = parse_object(o->oid.hash);
81 if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged)
82 o = ((struct tag *)o)->tagged;
83 else
84 o = NULL;
86 return o;
89 struct tag *lookup_tag(const unsigned char *sha1)
91 struct object *obj = lookup_object(sha1);
92 if (!obj)
93 return create_object(sha1, alloc_tag_node());
94 return object_as_type(obj, OBJ_TAG, 0);
97 static unsigned long parse_tag_date(const char *buf, const char *tail)
99 const char *dateptr;
101 while (buf < tail && *buf++ != '>')
102 /* nada */;
103 if (buf >= tail)
104 return 0;
105 dateptr = buf;
106 while (buf < tail && *buf++ != '\n')
107 /* nada */;
108 if (buf >= tail)
109 return 0;
110 /* dateptr < buf && buf[-1] == '\n', so strtoul will stop at buf-1 */
111 return strtoul(dateptr, NULL, 10);
114 int parse_tag_buffer(struct tag *item, const void *data, unsigned long size)
116 unsigned char sha1[20];
117 char type[20];
118 const char *bufptr = data;
119 const char *tail = bufptr + size;
120 const char *nl;
122 if (item->object.parsed)
123 return 0;
124 item->object.parsed = 1;
126 if (size < 64)
127 return -1;
128 if (memcmp("object ", bufptr, 7) || get_sha1_hex(bufptr + 7, sha1) || bufptr[47] != '\n')
129 return -1;
130 bufptr += 48; /* "object " + sha1 + "\n" */
132 if (!starts_with(bufptr, "type "))
133 return -1;
134 bufptr += 5;
135 nl = memchr(bufptr, '\n', tail - bufptr);
136 if (!nl || sizeof(type) <= (nl - bufptr))
137 return -1;
138 memcpy(type, bufptr, nl - bufptr);
139 type[nl - bufptr] = '\0';
140 bufptr = nl + 1;
142 if (!strcmp(type, blob_type)) {
143 item->tagged = &lookup_blob(sha1)->object;
144 } else if (!strcmp(type, tree_type)) {
145 item->tagged = &lookup_tree(sha1)->object;
146 } else if (!strcmp(type, commit_type)) {
147 item->tagged = &lookup_commit(sha1)->object;
148 } else if (!strcmp(type, tag_type)) {
149 item->tagged = &lookup_tag(sha1)->object;
150 } else {
151 error("Unknown type %s", type);
152 item->tagged = NULL;
155 if (bufptr + 4 < tail && starts_with(bufptr, "tag "))
156 ; /* good */
157 else
158 return -1;
159 bufptr += 4;
160 nl = memchr(bufptr, '\n', tail - bufptr);
161 if (!nl)
162 return -1;
163 item->tag = xmemdupz(bufptr, nl - bufptr);
164 bufptr = nl + 1;
166 if (bufptr + 7 < tail && starts_with(bufptr, "tagger "))
167 item->date = parse_tag_date(bufptr, tail);
168 else
169 item->date = 0;
171 return 0;
174 int parse_tag(struct tag *item)
176 enum object_type type;
177 void *data;
178 unsigned long size;
179 int ret;
181 if (item->object.parsed)
182 return 0;
183 data = read_sha1_file(item->object.oid.hash, &type, &size);
184 if (!data)
185 return error("Could not read %s",
186 oid_to_hex(&item->object.oid));
187 if (type != OBJ_TAG) {
188 free(data);
189 return error("Object %s not a tag",
190 oid_to_hex(&item->object.oid));
192 ret = parse_tag_buffer(item, data, size);
193 free(data);
194 return ret;