t/helper: ignore only executable files
[git/git.git] / tag.c
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"
9 #include "packfile.h"
10
11 const char *tag_type = "tag";
12
13 static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags)
14 {
15 struct signature_check sigc;
16 size_t payload_size;
17 int ret;
18
19 memset(&sigc, 0, sizeof(sigc));
20
21 payload_size = parse_signature(buf, size);
22
23 if (size == payload_size) {
24 if (flags & GPG_VERIFY_VERBOSE)
25 write_in_full(1, buf, payload_size);
26 return error("no signature found");
27 }
28
29 ret = check_signature(buf, payload_size, buf + payload_size,
30 size - payload_size, &sigc);
31
32 if (!(flags & GPG_VERIFY_OMIT_STATUS))
33 print_signature_buffer(&sigc, flags);
34
35 signature_check_clear(&sigc);
36 return ret;
37 }
38
39 int gpg_verify_tag(const struct object_id *oid, const char *name_to_report,
40 unsigned flags)
41 {
42 enum object_type type;
43 char *buf;
44 unsigned long size;
45 int ret;
46
47 type = oid_object_info(the_repository, oid, NULL);
48 if (type != OBJ_TAG)
49 return error("%s: cannot verify a non-tag object of type %s.",
50 name_to_report ?
51 name_to_report :
52 find_unique_abbrev(oid, DEFAULT_ABBREV),
53 type_name(type));
54
55 buf = read_object_file(oid, &type, &size);
56 if (!buf)
57 return error("%s: unable to read file.",
58 name_to_report ?
59 name_to_report :
60 find_unique_abbrev(oid, DEFAULT_ABBREV));
61
62 ret = run_gpg_verify(buf, size, flags);
63
64 free(buf);
65 return ret;
66 }
67
68 struct object *deref_tag(struct repository *r, struct object *o, const char *warn, int warnlen)
69 {
70 struct object_id *last_oid = NULL;
71 while (o && o->type == OBJ_TAG)
72 if (((struct tag *)o)->tagged) {
73 last_oid = &((struct tag *)o)->tagged->oid;
74 o = parse_object(r, last_oid);
75 } else {
76 last_oid = NULL;
77 o = NULL;
78 }
79 if (!o && warn) {
80 if (last_oid && is_promisor_object(last_oid))
81 return NULL;
82 if (!warnlen)
83 warnlen = strlen(warn);
84 error("missing object referenced by '%.*s'", warnlen, warn);
85 }
86 return o;
87 }
88
89 struct object *deref_tag_noverify(struct object *o)
90 {
91 while (o && o->type == OBJ_TAG) {
92 o = parse_object(the_repository, &o->oid);
93 if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged)
94 o = ((struct tag *)o)->tagged;
95 else
96 o = NULL;
97 }
98 return o;
99 }
100
101 struct tag *lookup_tag(struct repository *r, const struct object_id *oid)
102 {
103 struct object *obj = lookup_object(r, oid);
104 if (!obj)
105 return create_object(r, oid, alloc_tag_node(r));
106 return object_as_type(r, obj, OBJ_TAG, 0);
107 }
108
109 static timestamp_t parse_tag_date(const char *buf, const char *tail)
110 {
111 const char *dateptr;
112
113 while (buf < tail && *buf++ != '>')
114 /* nada */;
115 if (buf >= tail)
116 return 0;
117 dateptr = buf;
118 while (buf < tail && *buf++ != '\n')
119 /* nada */;
120 if (buf >= tail)
121 return 0;
122 /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */
123 return parse_timestamp(dateptr, NULL, 10);
124 }
125
126 void release_tag_memory(struct tag *t)
127 {
128 free(t->tag);
129 t->tagged = NULL;
130 t->object.parsed = 0;
131 t->date = 0;
132 }
133
134 int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, unsigned long size)
135 {
136 struct object_id oid;
137 char type[20];
138 const char *bufptr = data;
139 const char *tail = bufptr + size;
140 const char *nl;
141
142 if (item->object.parsed)
143 return 0;
144 item->object.parsed = 1;
145
146 if (size < the_hash_algo->hexsz + 24)
147 return -1;
148 if (memcmp("object ", bufptr, 7) || parse_oid_hex(bufptr + 7, &oid, &bufptr) || *bufptr++ != '\n')
149 return -1;
150
151 if (!starts_with(bufptr, "type "))
152 return -1;
153 bufptr += 5;
154 nl = memchr(bufptr, '\n', tail - bufptr);
155 if (!nl || sizeof(type) <= (nl - bufptr))
156 return -1;
157 memcpy(type, bufptr, nl - bufptr);
158 type[nl - bufptr] = '\0';
159 bufptr = nl + 1;
160
161 if (!strcmp(type, blob_type)) {
162 item->tagged = (struct object *)lookup_blob(r, &oid);
163 } else if (!strcmp(type, tree_type)) {
164 item->tagged = (struct object *)lookup_tree(r, &oid);
165 } else if (!strcmp(type, commit_type)) {
166 item->tagged = (struct object *)lookup_commit(r, &oid);
167 } else if (!strcmp(type, tag_type)) {
168 item->tagged = (struct object *)lookup_tag(r, &oid);
169 } else {
170 error("Unknown type %s", type);
171 item->tagged = NULL;
172 }
173
174 if (bufptr + 4 < tail && starts_with(bufptr, "tag "))
175 ; /* good */
176 else
177 return -1;
178 bufptr += 4;
179 nl = memchr(bufptr, '\n', tail - bufptr);
180 if (!nl)
181 return -1;
182 item->tag = xmemdupz(bufptr, nl - bufptr);
183 bufptr = nl + 1;
184
185 if (bufptr + 7 < tail && starts_with(bufptr, "tagger "))
186 item->date = parse_tag_date(bufptr, tail);
187 else
188 item->date = 0;
189
190 return 0;
191 }
192
193 int parse_tag(struct tag *item)
194 {
195 enum object_type type;
196 void *data;
197 unsigned long size;
198 int ret;
199
200 if (item->object.parsed)
201 return 0;
202 data = read_object_file(&item->object.oid, &type, &size);
203 if (!data)
204 return error("Could not read %s",
205 oid_to_hex(&item->object.oid));
206 if (type != OBJ_TAG) {
207 free(data);
208 return error("Object %s not a tag",
209 oid_to_hex(&item->object.oid));
210 }
211 ret = parse_tag_buffer(the_repository, item, data, size);
212 free(data);
213 return ret;
214 }