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#include "git-compat-util.h"
#include "gettext.h"
#include "hex.h"
#include "object.h"
#include "pkt-line.h"
#include "connect.h"
#include "oid-array.h"
#include "odb.h"
#include "fetch-object-info.h"
#include "string-list.h"
/* Sends object-info command and its arguments into the request buffer. */
static void send_object_info_request(const int fd_out,
const struct string_list *server_options,
const struct oid_array *oids,
unsigned ask_size,
unsigned ask_type)
{
struct strbuf req_buf = STRBUF_INIT;
write_command_and_capabilities(&req_buf, "object-info", server_options);
if (ask_size)
packet_buf_write(&req_buf, "size");
if (ask_type)
packet_buf_write(&req_buf, "type");
if (oids)
for (size_t i = 0; i < oids->nr; i++)
packet_buf_write(&req_buf, "oid %s",
oid_to_hex(&oids->oid[i]));
packet_buf_flush(&req_buf);
if (write_in_full(fd_out, req_buf.buf, req_buf.len) < 0)
die_errno(_("unable to write request to remote"));
strbuf_release(&req_buf);
}
static int parse_object_size(const char *s, size_t *res)
{
uintmax_t uim;
if (!s[0] || s[strspn(s, "0123456789")])
return -1;
errno = 0;
uim = strtoumax(s, NULL, 10);
if (errno || uim > SIZE_MAX)
return -1;
*res = uim;
return 0;
}
void fetch_object_info(const enum protocol_version version,
const struct string_list *server_options,
const struct oid_array *oids,
struct packet_reader *reader,
struct fetch_object_info_results *results,
const int stateless_rpc,
const int fd_out)
{
unsigned ask_size = 0;
unsigned ask_type = 0;
int size_index = -1;
int type_index = -1;
size_t wanted;
results->nr = oids->nr;
CALLOC_ARRAY(results->unrecognized, results->nr);
switch (version) {
case protocol_v2:
if (!server_supports_v2("object-info"))
die(_("object-info capability is not enabled on the server"));
if (results->wants_size &&
server_supports_feature("object-info", "size", 0))
ask_size = 1;
if (results->wants_type &&
server_supports_feature("object-info", "type", 0))
ask_type = 1;
/*
* Even if no options are left, we still send the oid so we get
* at least an existence check.
*/
send_object_info_request(fd_out, server_options, oids, ask_size,
ask_type);
break;
case protocol_v1:
case protocol_v0:
die(_("object-info requires protocol v2"));
case protocol_unknown_version:
BUG("unknown protocol version");
}
wanted = ask_size + ask_type;
for (size_t i = 0; i < wanted; i++) {
if (packet_reader_read(reader) != PACKET_READ_NORMAL) {
check_stateless_delimiter(stateless_rpc, reader,
"stateless delimiter expected");
die(_("object-info: expected %" PRIuMAX " attributes, got %" PRIuMAX),
(uintmax_t)wanted, (uintmax_t)i);
}
if (!strcmp(reader->line, "size")) {
if (!ask_size)
die(_("object-info: unrequested 'size' attribute"));
if (results->sizes)
die(_("object-info: duplicate 'size' attribute"));
size_index = (int)i;
CALLOC_ARRAY(results->sizes, results->nr);
} else if (!strcmp(reader->line, "type")) {
if (!ask_type)
die(_("object-info: unrequested 'type' attribute"));
if (results->types)
die(_("object-info: duplicate 'type' attribute"));
type_index = (int)i;
CALLOC_ARRAY(results->types, results->nr);
} else {
die(_("object-info: unknown attribute '%s'"),
reader->line);
}
}
for (size_t i = 0; i < oids->nr; i++) {
struct string_list object_info_values = STRING_LIST_INIT_DUP;
if (packet_reader_read(reader) != PACKET_READ_NORMAL)
die(_("object-info: expected %" PRIuMAX " objects, got %" PRIuMAX),
(uintmax_t)oids->nr, (uintmax_t)i);
string_list_split(&object_info_values, reader->line, " ", -1);
if (strcmp(object_info_values.items[0].string,
oid_to_hex(&oids->oid[i])))
die(_("object-info: expected OID: %s, got %s"),
oid_to_hex(&oids->oid[i]),
object_info_values.items[0].string);
/*
* If the response is two elements but the second one is an
* empty string, that means that the OID is unrecognized by the
* server.
*/
if (object_info_values.nr >= 2 &&
!strcmp(object_info_values.items[1].string, "")) {
results->unrecognized[i] = 1;
string_list_clear(&object_info_values, 0);
continue;
}
/*
* Because we only ask for attributes the server said it
* supports, we expect the answer to have one value per
* requested attribute, plus the OID.
*/
if (wanted + 1 != object_info_values.nr)
die("object-info: unexpected number of attributes: %s",
reader->line);
if (results->sizes &&
parse_object_size(object_info_values.items[size_index + 1].string,
&results->sizes[i]))
die("object-info: object %s has invalid size %s",
object_info_values.items[0].string,
object_info_values.items[size_index + 1].string);
if (results->types) {
const char *type_str =
object_info_values.items[type_index + 1].string;
int type = type_from_string_gently(type_str, -1, 1);
if (type < 0)
die(_("object-info: object %s has invalid type '%s'"),
object_info_values.items[0].string, type_str);
results->types[i] = type;
}
string_list_clear(&object_info_values, 0);
}
if (packet_reader_read(reader) != PACKET_READ_FLUSH)
die(_("object-info: expected flush after %" PRIuMAX " objects"),
(uintmax_t)oids->nr);
check_stateless_delimiter(stateless_rpc, reader, "stateless delimiter expected");
}
void free_fetch_object_info_results(struct fetch_object_info_results *results)
{
free(results->sizes);
free(results->types);
free(results->unrecognized);
memset(results, 0, sizeof(*results));
}
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