e451d06bf3
Just like with committer dates, we parse the tagger date into the struct tag so its available for further downstream processing. However since the tagger header was not introduced until Git 0.99.1 we must consider it optional. For tags missing this header we use the default date of 0. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
#include "cache.h"
|
|
#include "tag.h"
|
|
#include "commit.h"
|
|
#include "tree.h"
|
|
#include "blob.h"
|
|
|
|
const char *tag_type = "tag";
|
|
|
|
struct object *deref_tag(struct object *o, const char *warn, int warnlen)
|
|
{
|
|
while (o && o->type == OBJ_TAG)
|
|
if (((struct tag *)o)->tagged)
|
|
o = parse_object(((struct tag *)o)->tagged->sha1);
|
|
else
|
|
o = NULL;
|
|
if (!o && warn) {
|
|
if (!warnlen)
|
|
warnlen = strlen(warn);
|
|
error("missing object referenced by '%.*s'", warnlen, warn);
|
|
}
|
|
return o;
|
|
}
|
|
|
|
struct tag *lookup_tag(const unsigned char *sha1)
|
|
{
|
|
struct object *obj = lookup_object(sha1);
|
|
if (!obj)
|
|
return create_object(sha1, OBJ_TAG, alloc_tag_node());
|
|
if (!obj->type)
|
|
obj->type = OBJ_TAG;
|
|
if (obj->type != OBJ_TAG) {
|
|
error("Object %s is a %s, not a tag",
|
|
sha1_to_hex(sha1), typename(obj->type));
|
|
return NULL;
|
|
}
|
|
return (struct tag *) obj;
|
|
}
|
|
|
|
static unsigned long parse_tag_date(const char *buf, const char *tail)
|
|
{
|
|
const char *dateptr;
|
|
|
|
while (buf < tail && *buf++ != '>')
|
|
/* nada */;
|
|
if (buf >= tail)
|
|
return 0;
|
|
dateptr = buf;
|
|
while (buf < tail && *buf++ != '\n')
|
|
/* nada */;
|
|
if (buf >= tail)
|
|
return 0;
|
|
/* dateptr < buf && buf[-1] == '\n', so strtoul will stop at buf-1 */
|
|
return strtoul(dateptr, NULL, 10);
|
|
}
|
|
|
|
int parse_tag_buffer(struct tag *item, void *data, unsigned long size)
|
|
{
|
|
unsigned char sha1[20];
|
|
char type[20];
|
|
const char *bufptr = data;
|
|
const char *tail = bufptr + size;
|
|
const char *nl;
|
|
|
|
if (item->object.parsed)
|
|
return 0;
|
|
item->object.parsed = 1;
|
|
|
|
if (size < 64)
|
|
return -1;
|
|
if (memcmp("object ", bufptr, 7) || get_sha1_hex(bufptr + 7, sha1) || bufptr[47] != '\n')
|
|
return -1;
|
|
bufptr += 48; /* "object " + sha1 + "\n" */
|
|
|
|
if (prefixcmp(bufptr, "type "))
|
|
return -1;
|
|
bufptr += 5;
|
|
nl = memchr(bufptr, '\n', tail - bufptr);
|
|
if (!nl || sizeof(type) <= (nl - bufptr))
|
|
return -1;
|
|
strncpy(type, bufptr, nl - bufptr);
|
|
type[nl - bufptr] = '\0';
|
|
bufptr = nl + 1;
|
|
|
|
if (!strcmp(type, blob_type)) {
|
|
item->tagged = &lookup_blob(sha1)->object;
|
|
} else if (!strcmp(type, tree_type)) {
|
|
item->tagged = &lookup_tree(sha1)->object;
|
|
} else if (!strcmp(type, commit_type)) {
|
|
item->tagged = &lookup_commit(sha1)->object;
|
|
} else if (!strcmp(type, tag_type)) {
|
|
item->tagged = &lookup_tag(sha1)->object;
|
|
} else {
|
|
error("Unknown type %s", type);
|
|
item->tagged = NULL;
|
|
}
|
|
|
|
if (prefixcmp(bufptr, "tag "))
|
|
return -1;
|
|
bufptr += 4;
|
|
nl = memchr(bufptr, '\n', tail - bufptr);
|
|
if (!nl)
|
|
return -1;
|
|
item->tag = xmemdupz(bufptr, nl - bufptr);
|
|
bufptr = nl + 1;
|
|
|
|
if (!prefixcmp(bufptr, "tagger "))
|
|
item->date = parse_tag_date(bufptr, tail);
|
|
else
|
|
item->date = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int parse_tag(struct tag *item)
|
|
{
|
|
enum object_type type;
|
|
void *data;
|
|
unsigned long size;
|
|
int ret;
|
|
|
|
if (item->object.parsed)
|
|
return 0;
|
|
data = read_sha1_file(item->object.sha1, &type, &size);
|
|
if (!data)
|
|
return error("Could not read %s",
|
|
sha1_to_hex(item->object.sha1));
|
|
if (type != OBJ_TAG) {
|
|
free(data);
|
|
return error("Object %s not a tag",
|
|
sha1_to_hex(item->object.sha1));
|
|
}
|
|
ret = parse_tag_buffer(item, data, size);
|
|
free(data);
|
|
return ret;
|
|
}
|