#include "revision.h"
#include "list-objects.h"
#include "run-command.h"
+#include "sigchain.h"
static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=<n>] <dir>";
static unsigned long oldest_have;
static int multi_ack, nr_our_refs;
+static int no_done;
static int use_thin_pack, use_ofs_delta, use_include_tag;
static int no_progress, daemon_mode;
static int shallow_nr;
static char line[1000];
unsigned char sha1[20];
char last_hex[41];
+ int got_common = 0;
+ int got_other = 0;
+ int sent_ready = 0;
save_commit_buffer = 0;
reset_timeout();
if (!len) {
+ if (multi_ack == 2 && got_common
+ && !got_other && ok_to_give_up()) {
+ sent_ready = 1;
+ packet_write(1, "ACK %s ready\n", last_hex);
+ }
if (have_obj.nr == 0 || multi_ack)
packet_write(1, "NAK\n");
+
+ if (no_done && sent_ready) {
+ packet_write(1, "ACK %s\n", last_hex);
+ return 0;
+ }
if (stateless_rpc)
exit(0);
+ got_common = 0;
+ got_other = 0;
continue;
}
strip(line, len);
if (!prefixcmp(line, "have ")) {
switch (got_sha1(line+5, sha1)) {
case -1: /* they have what we do not */
+ got_other = 1;
if (multi_ack && ok_to_give_up()) {
const char *hex = sha1_to_hex(sha1);
- if (multi_ack == 2)
+ if (multi_ack == 2) {
+ sent_ready = 1;
packet_write(1, "ACK %s ready\n", hex);
- else
+ } else
packet_write(1, "ACK %s continue\n", hex);
}
break;
default:
+ got_common = 1;
memcpy(last_hex, sha1_to_hex(sha1), 41);
if (multi_ack == 2)
packet_write(1, "ACK %s common\n", last_hex);
}
}
+static void check_non_tip(void)
+{
+ static const char *argv[] = {
+ "rev-list", "--stdin", NULL,
+ };
+ static struct child_process cmd;
+ struct object *o;
+ char namebuf[42]; /* ^ + SHA-1 + LF */
+ int i;
+
+ /* In the normal in-process case non-tip request can never happen */
+ if (!stateless_rpc)
+ goto error;
+
+ cmd.argv = argv;
+ cmd.git_cmd = 1;
+ cmd.no_stderr = 1;
+ cmd.in = -1;
+ cmd.out = -1;
+
+ if (start_command(&cmd))
+ goto error;
+
+ /*
+ * If rev-list --stdin encounters an unknown commit, it
+ * terminates, which will cause SIGPIPE in the write loop
+ * below.
+ */
+ sigchain_push(SIGPIPE, SIG_IGN);
+
+ namebuf[0] = '^';
+ namebuf[41] = '\n';
+ for (i = get_max_object_index(); 0 < i; ) {
+ o = get_indexed_object(--i);
+ if (!o)
+ continue;
+ if (!(o->flags & OUR_REF))
+ continue;
+ memcpy(namebuf + 1, sha1_to_hex(o->sha1), 40);
+ if (write_in_full(cmd.in, namebuf, 42) < 0)
+ goto error;
+ }
+ namebuf[40] = '\n';
+ for (i = 0; i < want_obj.nr; i++) {
+ o = want_obj.objects[i].item;
+ if (o->flags & OUR_REF)
+ continue;
+ memcpy(namebuf, sha1_to_hex(o->sha1), 40);
+ if (write_in_full(cmd.in, namebuf, 41) < 0)
+ goto error;
+ }
+ close(cmd.in);
+
+ sigchain_pop(SIGPIPE);
+
+ /*
+ * The commits out of the rev-list are not ancestors of
+ * our ref.
+ */
+ i = read_in_full(cmd.out, namebuf, 1);
+ if (i)
+ goto error;
+ close(cmd.out);
+
+ /*
+ * rev-list may have died by encountering a bad commit
+ * in the history, in which case we do want to bail out
+ * even when it showed no commit.
+ */
+ if (finish_command(&cmd))
+ goto error;
+
+ /* All the non-tip ones are ancestors of what we advertised */
+ return;
+
+error:
+ /* Pick one of them (we know there at least is one) */
+ for (i = 0; i < want_obj.nr; i++) {
+ o = want_obj.objects[i].item;
+ if (!(o->flags & OUR_REF))
+ die("git upload-pack: not our ref %s",
+ sha1_to_hex(o->sha1));
+ }
+}
+
static void receive_needs(void)
{
struct object_array shallows = OBJECT_ARRAY_INIT;
static char line[1000];
int len, depth = 0;
+ int has_non_tip = 0;
shallow_nr = 0;
if (debug_fd)
multi_ack = 2;
else if (strstr(line+45, "multi_ack"))
multi_ack = 1;
+ if (strstr(line+45, "no-done"))
+ no_done = 1;
if (strstr(line+45, "thin-pack"))
use_thin_pack = 1;
if (strstr(line+45, "ofs-delta"))
if (strstr(line+45, "include-tag"))
use_include_tag = 1;
- /* We have sent all our refs already, and the other end
- * should have chosen out of them; otherwise they are
- * asking for nonsense.
- *
- * Hmph. We may later want to allow "want" line that
- * asks for something like "master~10" (symbolic)...
- * would it make sense? I don't know.
- */
o = lookup_object(sha1_buf);
- if (!o || !(o->flags & OUR_REF))
+ if (!o)
die("git upload-pack: not our ref %s",
sha1_to_hex(sha1_buf));
if (!(o->flags & WANTED)) {
o->flags |= WANTED;
+ if (!(o->flags & OUR_REF))
+ has_non_tip = 1;
add_object_array(o, NULL, &want_obj);
}
}
if (debug_fd)
write_str_in_full(debug_fd, "#E\n");
+ /*
+ * We have sent all our refs already, and the other end
+ * should have chosen out of them. When we are operating
+ * in the stateless RPC mode, however, their choice may
+ * have been based on the set of older refs advertised
+ * by another process that handled the initial request.
+ */
+ if (has_non_tip)
+ check_non_tip();
+
if (!use_sideband && daemon_mode)
no_progress = 1;
die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
if (capabilities)
- packet_write(1, "%s %s%c%s\n", sha1_to_hex(sha1), refname,
- 0, capabilities);
+ packet_write(1, "%s %s%c%s%s\n", sha1_to_hex(sha1), refname,
+ 0, capabilities,
+ stateless_rpc ? " no-done" : "");
else
packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
capabilities = NULL;
int i;
int strict = 0;
+ packet_trace_identity("upload-pack");
git_extract_argv0_path(argv[0]);
read_replace_refs = 0;