terminate the connection by sending a flush-pkt, telling the server it can
now gracefully terminate, and disconnect, when it does not need any pack
data. This can happen with the ls-remote command, and also can happen when
-the client already is up-to-date.
+the client already is up to date.
Otherwise, it enters the negotiation phase, where the client and
server determine what the minimal packfile necessary for transport is,
shallow-line = PKT-LINE("shallow" SP obj-id)
- depth-request = PKT-LINE("deepen" SP depth)
+ depth-request = PKT-LINE("deepen" SP depth) /
+ PKT-LINE("deepen-since" SP timestamp) /
+ PKT-LINE("deepen-not" SP ref)
first-want = PKT-LINE("want" SP obj-id SP capability-list)
additional-want = PKT-LINE("want" SP obj-id)
ready to make a packfile, it will blindly ACK all 'have' obj-ids
back to the client.
- * the server will then send a 'NACK' and then wait for another response
+ * the server will then send a 'NAK' and then wait for another response
from the client - either a 'done' or another list of 'have' lines.
In multi_ack_detailed mode:
multi_ack_detailed is enabled. The server always sends NAK after 'done'
if there is no common base found.
+Instead of 'ACK' or 'NAK', the server may send an error message (for
+example, if it does not recognize an object in a 'want' line received
+from the client).
+
Then the server will start sending its packfile data.
----
- server-response = *ack_multi ack / nak
+ server-response = *ack_multi ack / nak / error-line
ack_multi = PKT-LINE("ACK" SP obj-id ack_status)
ack_status = "continue" / "common" / "ready"
ack = PKT-LINE("ACK" SP obj-id)
nak = PKT-LINE("NAK")
+ error-line = PKT-LINE("ERR" SP explanation-text)
----
A simple clone may look like this (with no 'have' lines):
fetching protocol. Each reference obj-id and name on the server is sent
in packet-line format to the client, followed by a flush-pkt. The only
real difference is that the capability listing is different - the only
-possible values are 'report-status', 'delete-refs' and 'ofs-delta'.
+possible values are 'report-status', 'delete-refs', 'ofs-delta' and
+'push-options'.
Reference Update Request and Packfile Transfer
----------------------------------------------
the server, the obj-id the client would like to update it to and the name
of the reference.
-This list is followed by a flush-pkt and then the packfile that should
-contain all the objects that the server will need to complete the new
-references.
+This list is followed by a flush-pkt.
----
- update-request = *shallow ( command-list | push-cert ) [packfile]
+ update-requests = *shallow ( command-list | push-cert )
shallow = PKT-LINE("shallow" SP obj-id)
PKT-LINE("pusher" SP ident LF)
PKT-LINE("pushee" SP url LF)
PKT-LINE("nonce" SP nonce LF)
+ *PKT-LINE("push-option" SP push-option LF)
PKT-LINE(LF)
*PKT-LINE(command LF)
*PKT-LINE(gpg-signature-lines LF)
PKT-LINE("push-cert-end" LF)
- packfile = "PACK" 28*(OCTET)
+ push-option = 1*( VCHAR | SP )
+----
+
+If the server has advertised the 'push-options' capability and the client has
+specified 'push-options' as part of the capability list above, the client then
+sends its push options followed by a flush-pkt.
+
+----
+ push-options = *PKT-LINE(push-option) flush-pkt
+----
+
+For backwards compatibility with older Git servers, if the client sends a push
+cert and push options, it MUST send its push options both embedded within the
+push cert and after the push cert. (Note that the push options within the cert
+are prefixed, but the push options after the cert are not.) Both these lists
+MUST be the same, modulo the prefix.
+
+After that the packfile that
+should contain all the objects that the server will need to complete the new
+references will be sent.
+
+----
+ packfile = "PACK" 28*(OCTET)
----
If the receiving end does not support delete-refs, the sending end MUST