2 * Copyright (C) 2009-2012 the libgit2 contributors
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"
20 struct filter_payload
{
22 const git_refspec
*spec
, *tagspec
;
27 static int filter_ref__cb(git_remote_head
*head
, void *payload
)
29 struct filter_payload
*p
= payload
;
32 if (!git_reference_is_valid_name(head
->name
))
35 if (!p
->found_head
&& strcmp(head
->name
, GIT_HEAD_FILE
) == 0)
37 else if (git_refspec_src_matches(p
->spec
, head
->name
))
39 else if (p
->remote
->download_tags
== GIT_REMOTE_DOWNLOAD_TAGS_ALL
&&
40 git_refspec_src_matches(p
->tagspec
, head
->name
))
46 /* If we have the object, mark it so we don't ask for it */
47 if (git_odb_exists(p
->odb
, &head
->oid
))
50 p
->remote
->need_pack
= 1;
52 return git_vector_insert(&p
->remote
->refs
, head
);
55 static int filter_wants(git_remote
*remote
)
57 struct filter_payload p
;
61 git_vector_clear(&remote
->refs
);
62 if (git_refspec__parse(&tagspec
, GIT_REFSPEC_TAGS
, true) < 0)
66 * The fetch refspec can be NULL, and what this means is that the
67 * user didn't specify one. This is fine, as it means that we're
68 * not interested in any particular branch but just the remote's
69 * HEAD, which will be stored in FETCH_HEAD after the fetch.
71 p
.spec
= git_remote_fetchspec(remote
);
76 if (git_repository_odb__weakptr(&p
.odb
, remote
->repo
) < 0)
79 error
= git_remote_ls(remote
, filter_ref__cb
, &p
);
82 git_refspec__free(&tagspec
);
88 * In this first version, we push all our refs in and start sending
89 * them out. When we get an ACK we hide that commit and continue
90 * traversing until we're done
92 int git_fetch_negotiate(git_remote
*remote
)
94 git_transport
*t
= remote
->transport
;
96 if (filter_wants(remote
) < 0) {
97 giterr_set(GITERR_NET
, "Failed to filter the reference list for wants");
101 /* Don't try to negotiate when we don't want anything */
102 if (remote
->refs
.length
== 0 || !remote
->need_pack
)
106 * Now we have everything set up so we can start tell the
107 * server what we want and what we have.
109 return t
->negotiate_fetch(t
,
111 (const git_remote_head
* const *)remote
->refs
.contents
,
112 remote
->refs
.length
);
115 int git_fetch_download_pack(
117 git_transfer_progress_callback progress_cb
,
118 void *progress_payload
)
120 git_transport
*t
= remote
->transport
;
122 if(!remote
->need_pack
)
125 return t
->download_pack(t
, remote
->repo
, &remote
->stats
, progress_cb
, progress_payload
);