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transport: convert get_refs_list to take a list of ref prefixes

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Convert the 'struct transport' virtual function 'get_refs_list()' to
optionally take an argv_array of ref prefixes.  When communicating with
a server using protocol v2 these ref prefixes can be sent when
requesting a listing of their refs allowing the server to filter the
refs it sends based on the sent prefixes.  This list will be ignored
when not using protocol v2.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Brandon Williams
2018-03-15 10:31:22 -07:00
committed by Junio C Hamano
parent e52449b672
commit 834cf34b26
3 changed files with 24 additions and 10 deletions
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11
transport-internal.h
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@@ -3,6 +3,7 @@
struct ref;
struct transport;
struct argv_array;
struct transport_vtable {
/**
@@ -17,11 +18,19 @@ struct transport_vtable {
* the transport to try to share connections, for_push is a
* hint as to whether the ultimate operation is a push or a fetch.
*
* If communicating using protocol v2 a list of prefixes can be
* provided to be sent to the server to enable it to limit the ref
* advertisement. Since ref filtering is done on the server's end, and
* only when using protocol v2, this list will be ignored when not
* using protocol v2 meaning this function can return refs which don't
* match the provided ref_prefixes.
*
* If the transport is able to determine the remote hash for
* the ref without a huge amount of effort, it should store it
* in the ref's old_sha1 field; otherwise it should be all 0.
**/
struct ref *(*get_refs_list)(struct transport *transport, int for_push);
struct ref *(*get_refs_list)(struct transport *transport, int for_push,
const struct argv_array *ref_prefixes);
/**
* Fetch the objects for the given refs. Note that this gets