currently on the server, then for the two to negotiate the smallest amount
of data to send in order to fully update one or the other.
+pkt-line Format
+---------------
+
+The descriptions below build on the pkt-line format described in
+protocol-common.txt. When the grammar indicate `PKT-LINE(...)`, unless
+otherwise noted the usual pkt-line LF rules apply: the sender SHOULD
+include a LF, but the receiver MUST NOT complain if it is not present.
+
Transports
----------
There are three transports over which the packfile protocol is
003fe92df48743b7bc7d26bcaabfddde0a1e20cae47c refs/tags/v1.0^{}
0000
-Server SHOULD terminate each non-flush line using LF ("\n") terminator;
-client MUST NOT complain if there is no terminator.
-
The returned response is a pkt-line stream describing each ref and
its current value. The stream MUST be sorted by name according to
the C locale ordering.
flush-pkt
no-refs = PKT-LINE(zero-id SP "capabilities^{}"
- NUL capability-list LF)
+ NUL capability-list)
list-of-refs = first-ref *other-ref
first-ref = PKT-LINE(obj-id SP refname
- NUL capability-list LF)
+ NUL capability-list)
other-ref = PKT-LINE(other-tip / other-peeled)
- other-tip = obj-id SP refname LF
- other-peeled = obj-id SP refname "^{}" LF
+ other-tip = obj-id SP refname
+ other-peeled = obj-id SP refname "^{}"
shallow = PKT-LINE("shallow" SP obj-id)
depth-request = PKT-LINE("deepen" SP depth)
- first-want = PKT-LINE("want" SP obj-id SP capability-list LF)
- additional-want = PKT-LINE("want" SP obj-id LF)
+ first-want = PKT-LINE("want" SP obj-id SP capability-list)
+ additional-want = PKT-LINE("want" SP obj-id)
depth = 1*DIGIT
----
compute-end
have-list = *have-line
- have-line = PKT-LINE("have" SP obj-id LF)
+ have-line = PKT-LINE("have" SP obj-id)
compute-end = flush-pkt / PKT-LINE("done")
----
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:
----
server-response = *ack_multi ack / nak
- ack_multi = PKT-LINE("ACK" SP obj-id ack_status LF)
+ ack_multi = PKT-LINE("ACK" SP obj-id ack_status)
ack_status = "continue" / "common" / "ready"
- ack = PKT-LINE("ACK SP obj-id LF)
- nak = PKT-LINE("NAK" LF)
+ ack = PKT-LINE("ACK" SP obj-id)
+ nak = PKT-LINE("NAK")
----
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. Then the push options are transmitted
+one per packet followed by another flush-pkt. After that the packfile that
+should contain all the objects that the server will need to complete the new
+references will be sent.
----
update-request = *shallow ( command-list | push-cert ) [packfile]
- shallow = PKT-LINE("shallow" SP obj-id LF)
+ shallow = PKT-LINE("shallow" SP obj-id)
- command-list = PKT-LINE(command NUL capability-list LF)
- *PKT-LINE(command LF)
+ command-list = PKT-LINE(command NUL capability-list)
+ *PKT-LINE(command)
flush-pkt
command = create / delete / update
A push certificate begins with a set of header lines. After the
header and an empty line, the protocol commands follow, one per
-line.
+line. Note that the trailing LF in push-cert PKT-LINEs is _not_
+optional; it must be present.
Currently, the following header fields are defined:
1*(command-status)
flush-pkt
- unpack-status = PKT-LINE("unpack" SP unpack-result LF)
+ unpack-status = PKT-LINE("unpack" SP unpack-result)
unpack-result = "ok" / error-msg
command-status = command-ok / command-fail
- command-ok = PKT-LINE("ok" SP refname LF)
- command-fail = PKT-LINE("ng" SP refname SP error-msg LF)
+ command-ok = PKT-LINE("ok" SP refname)
+ command-fail = PKT-LINE("ng" SP refname SP error-msg)
error-msg = 1*(OCTECT) ; where not "ok"
----