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[PATCH v2 17/19] send-pack: send feature request on push-cert packet

From
Junio C Hamano <gitster@pobox.com>
Date
Aug 22, 2014, 20:30 UTC
Message-ID
<1408739424-31429-18-git-send-email-gitster@pobox.com>
In-Reply-To
<1408739424-31429-1-git-send-email-gitster@pobox.com>

We would want to update the interim protocol so that we do not send the usual update commands when the push certificate feature is in use, as the same information is in the certificate. Once that happens, the push-cert packet may become the only protocol command, but then there is no packet to put the feature request behind, like we always did.

As we have prepared the receiving end that understands the push-cert feature to accept the feature request on the first protocol packet (other than "shallow ", which was an unfortunate historical mistake that has to come before everything else), we can give the feature request on the push-cert packet instead of the first update protocol packet, in preparation for the next step to actually update to the final protocol.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 send-pack.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/send-pack.c b/send-pack.c
index 10c907f..4125892 100644
--- a/send-pack.c
+++ b/send-pack.c
@@ -225,9 +225,10 @@ static const char *next_line(const char *line, size_t len)
 	return nl + 1;
 }
 
-static void generate_push_cert(struct strbuf *req_buf,
-			       const struct ref *remote_refs,
-			       struct send_pack_args *args)
+static int generate_push_cert(struct strbuf *req_buf,
+			      const struct ref *remote_refs,
+			      struct send_pack_args *args,
+			      const char *cap_string)
 {
 	const struct ref *ref;
 	char stamp[60];
@@ -256,7 +257,7 @@ static void generate_push_cert(struct strbuf *req_buf,
 	if (sign_buffer(&cert, &cert, signing_key))
 		die(_("failed to sign the push certificate"));
 
-	packet_buf_write(req_buf, "push-cert\n");
+	packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
 	for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
 		np = next_line(cp, cert.buf + cert.len - cp);
 		packet_buf_write(req_buf,
@@ -267,6 +268,7 @@ static void generate_push_cert(struct strbuf *req_buf,
 free_return:
 	free(signing_key);
 	strbuf_release(&cert);
+	return 1;
 }
 
 int send_pack(struct send_pack_args *args,
@@ -335,7 +337,8 @@ int send_pack(struct send_pack_args *args,
 		advertise_shallow_grafts_buf(&req_buf);
 
 	if (!args->dry_run && args->push_cert)
-		generate_push_cert(&req_buf, remote_refs, args);
+		cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
+					       cap_buf.buf);
 
 	/*
 	 * Clear the status for each ref and see if we need to send
-- 
2.1.0-304-g950f846
Previous: Junio C HamanoNext: Junio C Hamano
Message 18 of 23 in “Signed push”
  1. 00/19 Signed pushJunio C Hamano, Aug 22, 2014
  2. 01/19 receive-pack: do not overallocate command structureJunio C Hamano, Aug 22, 2014
  3. 02/19 receive-pack: parse feature request a bit earlierJunio C Hamano, Aug 22, 2014
  4. 03/19 receive-pack: do not reuse old_sha1[] for other thingsJunio C Hamano, Aug 22, 2014
  5. 04/19 receive-pack: factor out queueing of commandJunio C Hamano, Aug 22, 2014
  6. 05/19 send-pack: move REF_STATUS_REJECT_NODELETE logic a bit higherJunio C Hamano, Aug 22, 2014
  7. 06/19 send-pack: refactor decision to send update per refJunio C Hamano, Aug 22, 2014
  8. 07/19 send-pack: always send capabilitiesJunio C Hamano, Aug 22, 2014
  9. 08/19 send-pack: factor out capability string generationJunio C Hamano, Aug 22, 2014
  10. 09/19 send-pack: rename "new_refs" to "need_pack_data"Junio C Hamano, Aug 22, 2014
  11. 10/19 send-pack: refactor inspecting and resetting status and sending commandsJunio C Hamano, Aug 22, 2014
  12. 11/19 send-pack: clarify that cmds_sent is a booleanJunio C Hamano, Aug 22, 2014
  13. 12/19 gpg-interface: move parse_gpg_output() to where it should beJunio C Hamano, Aug 22, 2014
  14. 13/19 gpg-interface: move parse_signature() to where it should beJunio C Hamano, Aug 22, 2014
  15. 14/19 pack-protocol doc: typofix for PKT-LINEJunio C Hamano, Aug 22, 2014
  16. 15/19 the beginning of the signed pushJunio C Hamano, Aug 22, 2014
  17. 16/19 receive-pack: GPG-validate push certificatesJunio C Hamano, Aug 22, 2014
  18. 17/19 send-pack: send feature request on push-cert packetJunio C Hamano, Aug 22, 2014
  19. 18/19 signed push: remove duplicated protocol infoJunio C Hamano, Aug 22, 2014
  20. 19/19 signed push: fortify against replay attacksJunio C Hamano, Aug 22, 2014
  21. Eric SunshineAug 24, 2014
  22. Stefan BellerAug 30, 2014
  23. Junio C HamanoSep 2, 2014

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