2 * Copyright (C) the libgit2 contributors. All rights reserved.
4 * This file is part of libgit2, distributed under the GNU GPL v2 with
5 * a Linking Exception. For full terms see the included COPYING file.
10 #include "git2/revwalk.h"
11 #include "git2/transport.h"
19 #include "repository.h"
22 static int maybe_want(git_remote
*remote
, git_remote_head
*head
, git_odb
*odb
, git_refspec
*tagspec
, git_remote_autotag_option_t tagopt
)
26 if (!git_reference_is_valid_name(head
->name
))
29 if (tagopt
== GIT_REMOTE_DOWNLOAD_TAGS_ALL
) {
31 * If tagopt is --tags, always request tags
32 * in addition to the remote's refspecs
34 if (git_refspec_src_matches(tagspec
, head
->name
))
38 if (!match
&& git_remote__matching_refspec(remote
, head
->name
))
44 /* If we have the object, mark it so we don't ask for it */
45 if (git_odb_exists(odb
, &head
->oid
)) {
49 remote
->need_pack
= 1;
51 return git_vector_insert(&remote
->refs
, head
);
54 static int filter_wants(git_remote
*remote
, const git_fetch_options
*opts
)
56 git_remote_head
**heads
;
57 git_refspec tagspec
, head
;
61 git_remote_autotag_option_t tagopt
= remote
->download_tags
;
63 if (opts
&& opts
->download_tags
!= GIT_REMOTE_DOWNLOAD_TAGS_FALLBACK
)
64 tagopt
= opts
->download_tags
;
66 git_vector_clear(&remote
->refs
);
67 if ((error
= git_refspec__parse(&tagspec
, GIT_REFSPEC_TAGS
, true)) < 0)
71 * The fetch refspec can be NULL, and what this means is that the
72 * user didn't specify one. This is fine, as it means that we're
73 * not interested in any particular branch but just the remote's
74 * HEAD, which will be stored in FETCH_HEAD after the fetch.
76 if (remote
->active_refspecs
.length
== 0) {
77 if ((error
= git_refspec__parse(&head
, "HEAD", true)) < 0)
80 error
= git_refspec__dwim_one(&remote
->active_refspecs
, &head
, &remote
->refs
);
81 git_refspec__free(&head
);
87 if (git_repository_odb__weakptr(&odb
, remote
->repo
) < 0)
90 if (git_remote_ls((const git_remote_head
***)&heads
, &heads_len
, remote
) < 0)
93 for (i
= 0; i
< heads_len
; i
++) {
94 if ((error
= maybe_want(remote
, heads
[i
], odb
, &tagspec
, tagopt
)) < 0)
99 git_refspec__free(&tagspec
);
105 * In this first version, we push all our refs in and start sending
106 * them out. When we get an ACK we hide that commit and continue
107 * traversing until we're done
109 int git_fetch_negotiate(git_remote
*remote
, const git_fetch_options
*opts
)
111 git_transport
*t
= remote
->transport
;
113 remote
->need_pack
= 0;
115 if (filter_wants(remote
, opts
) < 0) {
116 giterr_set(GITERR_NET
, "Failed to filter the reference list for wants");
120 /* Don't try to negotiate when we don't want anything */
121 if (!remote
->need_pack
)
125 * Now we have everything set up so we can start tell the
126 * server what we want and what we have.
128 return t
->negotiate_fetch(t
,
130 (const git_remote_head
* const *)remote
->refs
.contents
,
131 remote
->refs
.length
);
134 int git_fetch_download_pack(git_remote
*remote
, const git_remote_callbacks
*callbacks
)
136 git_transport
*t
= remote
->transport
;
137 git_transfer_progress_cb progress
= NULL
;
138 void *payload
= NULL
;
140 if (!remote
->need_pack
)
144 progress
= callbacks
->transfer_progress
;
145 payload
= callbacks
->payload
;
148 return t
->download_pack(t
, remote
->repo
, &remote
->stats
, progress
, payload
);
151 int git_fetch_init_options(git_fetch_options
*opts
, unsigned int version
)
153 GIT_INIT_STRUCTURE_FROM_TEMPLATE(
154 opts
, version
, git_fetch_options
, GIT_FETCH_OPTIONS_INIT
);