"git-send-pack [--all] [--exec=git-receive-pack] <remote> [<head>...]\n"
" --all and explicit <head> specification are mutually exclusive.";
static const char *exec = "git-receive-pack";
-static int verbose = 0;
-static int send_all = 0;
-static int force_update = 0;
-static int use_thin_pack = 0;
+static int verbose;
+static int send_all;
+static int force_update;
+static int use_thin_pack;
static int is_zero_sha1(const unsigned char *sha1)
{
static void exec_rev_list(struct ref *refs)
{
- struct ref *ref;
- static const char *args[1000];
- int i = 0, j;
+ static const char *args[4];
+ int i = 0;
args[i++] = "rev-list"; /* 0 */
if (use_thin_pack) /* 1 */
else
args[i++] = "--objects";
- /* First send the ones we care about most */
- for (ref = refs; ref; ref = ref->next) {
- if (900 < i)
- die("git-rev-list environment overflow");
- if (!is_zero_sha1(ref->new_sha1)) {
- char *buf = malloc(100);
- args[i++] = buf;
- snprintf(buf, 50, "%s", sha1_to_hex(ref->new_sha1));
- buf += 50;
- if (!is_zero_sha1(ref->old_sha1) &&
- has_sha1_file(ref->old_sha1)) {
- args[i++] = buf;
- snprintf(buf, 50, "^%s",
- sha1_to_hex(ref->old_sha1));
- }
- }
- }
+ args[i++] = "--stdin";
- /* Then a handful of the remainder
- * NEEDSWORK: we would be better off if used the newer ones first.
- */
- for (ref = refs, j = i + 16;
- i < 900 && i < j && ref;
- ref = ref->next) {
- if (is_zero_sha1(ref->new_sha1) &&
- !is_zero_sha1(ref->old_sha1) &&
- has_sha1_file(ref->old_sha1)) {
- char *buf = malloc(42);
- args[i++] = buf;
- snprintf(buf, 42, "^%s", sha1_to_hex(ref->old_sha1));
- }
- }
args[i] = NULL;
execv_git_cmd(args);
die("git-rev-list exec failed (%s)", strerror(errno));
}
+/*
+ * Run "rev-list --stdin | pack-objects" pipe.
+ */
static void rev_list(int fd, struct ref *refs)
{
int pipe_fd[2];
die("rev-list setup: pipe failed");
pack_objects_pid = fork();
if (!pack_objects_pid) {
+ /* The child becomes pack-objects; reads from pipe
+ * and writes to the original fd
+ */
dup2(pipe_fd[0], 0);
dup2(fd, 1);
close(pipe_fd[0]);
}
if (pack_objects_pid < 0)
die("pack-objects fork failed");
+
+ /* We become rev-list --stdin; output goes to pipe. */
dup2(pipe_fd[1], 1);
close(pipe_fd[0]);
close(pipe_fd[1]);
exec_rev_list(refs);
}
-static int pack_objects(int fd, struct ref *refs)
+/*
+ * Create "rev-list --stdin | pack-objects" pipe and feed
+ * the refs into the pipeline.
+ */
+static void rev_list_generate(int fd, struct ref *refs)
+{
+ int pipe_fd[2];
+ pid_t rev_list_generate_pid;
+
+ if (pipe(pipe_fd) < 0)
+ die("rev-list-generate setup: pipe failed");
+ rev_list_generate_pid = fork();
+ if (!rev_list_generate_pid) {
+ /* The child becomes the "rev-list | pack-objects"
+ * pipeline. It takes input from us, and its output
+ * goes to fd.
+ */
+ dup2(pipe_fd[0], 0);
+ dup2(fd, 1);
+ close(pipe_fd[0]);
+ close(pipe_fd[1]);
+ close(fd);
+ rev_list(fd, refs);
+ die("rev-list setup failed");
+ }
+ if (rev_list_generate_pid < 0)
+ die("rev-list-generate fork failed");
+
+ /* We feed the rev parameters to them. We do not write into
+ * fd nor read from the pipe.
+ */
+ close(pipe_fd[0]);
+ close(fd);
+ while (refs) {
+ char buf[42];
+
+ if (!is_null_sha1(refs->old_sha1) &&
+ has_sha1_file(refs->old_sha1)) {
+ memcpy(buf + 1, sha1_to_hex(refs->old_sha1), 40);
+ buf[0] = '^';
+ buf[41] = '\n';
+ write(pipe_fd[1], buf, 42);
+ }
+ if (!is_null_sha1(refs->new_sha1)) {
+ memcpy(buf, sha1_to_hex(refs->new_sha1), 40);
+ buf[40] = '\n';
+ write(pipe_fd[1], buf, 41);
+ }
+ refs = refs->next;
+ }
+ close(pipe_fd[1]);
+ // waitpid(rev_list_generate_pid);
+ exit(0);
+}
+
+/*
+ * Make a pack stream and spit it out into file descriptor fd
+ */
+static void pack_objects(int fd, struct ref *refs)
{
pid_t rev_list_pid;
rev_list_pid = fork();
if (!rev_list_pid) {
- rev_list(fd, refs);
+ rev_list_generate(fd, refs);
die("rev-list setup failed");
}
if (rev_list_pid < 0)
* We don't wait for the rev-list pipeline in the parent:
* we end up waiting for the other end instead
*/
- return 0;
}
static void unmark_and_free(struct commit_list *list, unsigned int mark)
struct ref *ref;
int len = strlen(refname) + 1;
ref = xcalloc(1, sizeof(*ref) + len);
- memcpy(ref->new_sha1, sha1, 20);
+ hashcpy(ref->new_sha1, sha1);
memcpy(ref->name, refname, len);
*local_tail = ref;
local_tail = &ref->next;
char old_hex[60], *new_hex;
if (!ref->peer_ref)
continue;
- if (!memcmp(ref->old_sha1, ref->peer_ref->new_sha1, 20)) {
+ if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
if (verbose)
fprintf(stderr, "'%s': up-to-date\n", ref->name);
continue;
continue;
}
}
- memcpy(ref->new_sha1, ref->peer_ref->new_sha1, 20);
+ hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
if (is_zero_sha1(ref->new_sha1)) {
error("cannot happen anymore");
ret = -3;
ret = send_pack(fd[0], fd[1], nr_heads, heads);
close(fd[0]);
close(fd[1]);
- finish_connect(pid);
- return ret;
+ ret |= finish_connect(pid);
+ return !!ret;
}