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41fa7d2eae
If the remote peer upload-pack process supports the include-tag
protocol extension then we can avoid running a second fetch cycle
on the client side by letting the server send us the annotated tags
along with the objects it is packing for us. In the following graph
we can now fetch both "tag1" and "tag2" on the same connection that
we fetched "master" from the remote when we only have L available
on the local side:
T - tag1 S - tag2
/ /
L - o ------ o ------ B
\ \
\ \
origin/master master
The objects for "tag1" are implicitly downloaded without our direct
knowledge. The existing "quickfetch" optimization within git-fetch
discovers that tag1 is complete after the first connection and does
not open a second connection.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
#ifndef TRANSPORT_H
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#define TRANSPORT_H
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#include "cache.h"
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#include "remote.h"
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struct transport {
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struct remote *remote;
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const char *url;
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void *data;
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const struct ref *remote_refs;
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/**
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* Returns 0 if successful, positive if the option is not
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* recognized or is inapplicable, and negative if the option
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* is applicable but the value is invalid.
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**/
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int (*set_option)(struct transport *connection, const char *name,
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const char *value);
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struct ref *(*get_refs_list)(struct transport *transport);
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int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs);
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int (*push)(struct transport *connection, int refspec_nr, const char **refspec, int flags);
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int (*disconnect)(struct transport *connection);
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char *pack_lockfile;
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signed verbose : 2;
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};
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#define TRANSPORT_PUSH_ALL 1
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#define TRANSPORT_PUSH_FORCE 2
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#define TRANSPORT_PUSH_DRY_RUN 4
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#define TRANSPORT_PUSH_MIRROR 8
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#define TRANSPORT_PUSH_VERBOSE 16
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/* Returns a transport suitable for the url */
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struct transport *transport_get(struct remote *, const char *);
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/* Transport options which apply to git:// and scp-style URLs */
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/* The program to use on the remote side to send a pack */
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#define TRANS_OPT_UPLOADPACK "uploadpack"
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/* The program to use on the remote side to receive a pack */
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#define TRANS_OPT_RECEIVEPACK "receivepack"
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/* Transfer the data as a thin pack if not null */
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#define TRANS_OPT_THIN "thin"
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/* Keep the pack that was transferred if not null */
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#define TRANS_OPT_KEEP "keep"
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/* Limit the depth of the fetch if not null */
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#define TRANS_OPT_DEPTH "depth"
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/* Aggressively fetch annotated tags if possible */
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#define TRANS_OPT_FOLLOWTAGS "followtags"
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/**
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* Returns 0 if the option was used, non-zero otherwise. Prints a
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* message to stderr if the option is not used.
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**/
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int transport_set_option(struct transport *transport, const char *name,
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const char *value);
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int transport_push(struct transport *connection,
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int refspec_nr, const char **refspec, int flags);
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const struct ref *transport_get_remote_refs(struct transport *transport);
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int transport_fetch_refs(struct transport *transport, struct ref *refs);
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void transport_unlock_pack(struct transport *transport);
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int transport_disconnect(struct transport *transport);
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#endif
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