+#ifndef COUNTERPART_ENV_NAME
+#define COUNTERPART_ENV_NAME "GIT_SSH_UPLOAD"
+#endif
+#ifndef COUNTERPART_PROGRAM_NAME
+#define COUNTERPART_PROGRAM_NAME "git-ssh-upload"
+#endif
+#ifndef MY_PROGRAM_NAME
+#define MY_PROGRAM_NAME "git-ssh-fetch"
+#endif
+
#include "cache.h"
#include "commit.h"
#include "rsh.h"
static int fd_in;
static int fd_out;
-static unsigned char remote_version = 0;
+static unsigned char remote_version;
static unsigned char local_version = 1;
-static ssize_t force_write(int fd, void *buffer, size_t length)
-{
- ssize_t ret = 0;
- while (ret < length) {
- ssize_t size = write(fd, buffer + ret, length - ret);
- if (size < 0) {
- return size;
- }
- if (size == 0) {
- return ret;
- }
- ret += size;
- }
- return ret;
-}
+static int prefetches;
+
+static struct object_list *in_transit;
+static struct object_list **end_of_transit = &in_transit;
void prefetch(unsigned char *sha1)
{
char type = 'o';
- force_write(fd_out, &type, 1);
- force_write(fd_out, sha1, 20);
- //memcpy(requested + 20 * prefetches++, sha1, 20);
+ struct object_list *node;
+ if (prefetches > 100) {
+ fetch(in_transit->item->sha1);
+ }
+ node = xmalloc(sizeof(struct object_list));
+ node->next = NULL;
+ node->item = lookup_unknown_object(sha1);
+ *end_of_transit = node;
+ end_of_transit = &node->next;
+ /* XXX: what if these writes fail? */
+ write_in_full(fd_out, &type, 1);
+ write_in_full(fd_out, sha1, 20);
+ prefetches++;
}
static char conn_buf[4096];
-static size_t conn_buf_posn = 0;
+static size_t conn_buf_posn;
int fetch(unsigned char *sha1)
{
int ret;
signed char remote;
+ struct object_list *temp;
+
+ if (hashcmp(sha1, in_transit->item->sha1)) {
+ /* we must have already fetched it to clean the queue */
+ return has_sha1_file(sha1) ? 0 : -1;
+ }
+ prefetches--;
+ temp = in_transit;
+ in_transit = in_transit->next;
+ if (!in_transit)
+ end_of_transit = &in_transit;
+ free(temp);
if (conn_buf_posn) {
remote = conn_buf[0];
memmove(conn_buf, conn_buf + 1, --conn_buf_posn);
} else {
- if (read(fd_in, &remote, 1) < 1)
+ if (xread(fd_in, &remote, 1) < 1)
return -1;
}
- //fprintf(stderr, "Got %d\n", remote);
+ /* fprintf(stderr, "Got %d\n", remote); */
if (remote < 0)
return remote;
ret = write_sha1_from_fd(sha1, fd_in, conn_buf, 4096, &conn_buf_posn);
static int get_version(void)
{
char type = 'v';
- write(fd_out, &type, 1);
- write(fd_out, &local_version, 1);
- if (read(fd_in, &remote_version, 1) < 1) {
+ if (write_in_full(fd_out, &type, 1) != 1 ||
+ write_in_full(fd_out, &local_version, 1)) {
+ return error("Couldn't request version from remote end");
+ }
+ if (xread(fd_in, &remote_version, 1) < 1) {
return error("Couldn't read version from remote end");
}
return 0;
{
signed char remote;
char type = 'r';
- write(fd_out, &type, 1);
- write(fd_out, ref, strlen(ref) + 1);
- read(fd_in, &remote, 1);
+ int length = strlen(ref) + 1;
+ if (write_in_full(fd_out, &type, 1) != 1 ||
+ write_in_full(fd_out, ref, length) != length)
+ return -1;
+
+ if (read_in_full(fd_in, &remote, 1) != 1)
+ return -1;
if (remote < 0)
return remote;
- read(fd_in, sha1, 20);
+ if (read_in_full(fd_in, sha1, 20) != 20)
+ return -1;
return 0;
}
+static const char ssh_fetch_usage[] =
+ MY_PROGRAM_NAME
+ " [-c] [-t] [-a] [-v] [--recover] [-w ref] commit-id url";
int main(int argc, char **argv)
{
+ const char *write_ref = NULL;
char *commit_id;
char *url;
int arg = 1;
prog = getenv("GIT_SSH_PUSH");
if (!prog) prog = "git-ssh-upload";
+ setup_git_directory();
+ git_config(git_default_config);
+
while (arg < argc && argv[arg][0] == '-') {
if (argv[arg][1] == 't') {
get_tree = 1;
} else if (argv[arg][1] == 'w') {
write_ref = argv[arg + 1];
arg++;
+ } else if (!strcmp(argv[arg], "--recover")) {
+ get_recover = 1;
}
arg++;
}
if (argc < arg + 2) {
- usage("git-ssh-fetch [-c] [-t] [-a] [-v] [-d] [--recover] [-w ref] commit-id url");
+ usage(ssh_fetch_usage);
return 1;
}
commit_id = argv[arg];
if (get_version())
return 1;
- if (pull(commit_id))
+ if (pull(1, &commit_id, &write_ref, url))
return 1;
return 0;