| /* |
| * Copyright (C) 2009-2012 the libgit2 contributors |
| * |
| * This file is part of libgit2, distributed under the GNU GPL v2 with |
| * a Linking Exception. For full terms see the included COPYING file. |
| */ |
| |
| #include "git2/remote.h" |
| #include "git2/oid.h" |
| #include "git2/refs.h" |
| #include "git2/revwalk.h" |
| #include "git2/indexer.h" |
| |
| #include "common.h" |
| #include "transport.h" |
| #include "remote.h" |
| #include "refspec.h" |
| #include "pack.h" |
| #include "fetch.h" |
| #include "netops.h" |
| |
| struct filter_payload { |
| git_remote *remote; |
| const git_refspec *spec; |
| git_odb *odb; |
| int found_head; |
| }; |
| |
| static int filter_ref__cb(git_remote_head *head, void *payload) |
| { |
| struct filter_payload *p = payload; |
| |
| if (!p->found_head && strcmp(head->name, GIT_HEAD_FILE) == 0) { |
| p->found_head = 1; |
| } else { |
| /* If it doesn't match the refpec, we don't want it */ |
| if (!git_refspec_src_matches(p->spec, head->name)) |
| return 0; |
| |
| /* Don't even try to ask for the annotation target */ |
| if (!git__suffixcmp(head->name, "^{}")) |
| return 0; |
| } |
| |
| /* If we have the object, mark it so we don't ask for it */ |
| if (git_odb_exists(p->odb, &head->oid)) |
| head->local = 1; |
| else |
| p->remote->need_pack = 1; |
| |
| return git_vector_insert(&p->remote->refs, head); |
| } |
| |
| static int filter_wants(git_remote *remote) |
| { |
| struct filter_payload p; |
| |
| git_vector_clear(&remote->refs); |
| |
| /* |
| * The fetch refspec can be NULL, and what this means is that the |
| * user didn't specify one. This is fine, as it means that we're |
| * not interested in any particular branch but just the remote's |
| * HEAD, which will be stored in FETCH_HEAD after the fetch. |
| */ |
| p.spec = git_remote_fetchspec(remote); |
| p.found_head = 0; |
| p.remote = remote; |
| |
| if (git_repository_odb__weakptr(&p.odb, remote->repo) < 0) |
| return -1; |
| |
| return remote->transport->ls(remote->transport, &filter_ref__cb, &p); |
| } |
| |
| /* |
| * In this first version, we push all our refs in and start sending |
| * them out. When we get an ACK we hide that commit and continue |
| * traversing until we're done |
| */ |
| int git_fetch_negotiate(git_remote *remote) |
| { |
| git_transport *t = remote->transport; |
| |
| if (filter_wants(remote) < 0) { |
| giterr_set(GITERR_NET, "Failed to filter the reference list for wants"); |
| return -1; |
| } |
| |
| /* Don't try to negotiate when we don't want anything */ |
| if (remote->refs.length == 0 || !remote->need_pack) |
| return 0; |
| |
| /* |
| * Now we have everything set up so we can start tell the server |
| * what we want and what we have. |
| */ |
| return t->negotiate_fetch(t, remote->repo, &remote->refs); |
| } |
| |
| int git_fetch_download_pack(git_remote *remote, git_off_t *bytes, git_indexer_stats *stats) |
| { |
| if(!remote->need_pack) |
| return 0; |
| |
| return remote->transport->download_pack(remote->transport, remote->repo, bytes, stats); |
| } |
| |
| /* Receiving data from a socket and storing it is pretty much the same for git and HTTP */ |
| int git_fetch__download_pack( |
| const char *buffered, |
| size_t buffered_size, |
| git_transport *t, |
| git_repository *repo, |
| git_off_t *bytes, |
| git_indexer_stats *stats) |
| { |
| int recvd; |
| char buff[1024]; |
| gitno_buffer buf; |
| git_indexer_stream *idx; |
| |
| gitno_buffer_setup(t, &buf, buff, sizeof(buff)); |
| |
| if (memcmp(buffered, "PACK", strlen("PACK"))) { |
| giterr_set(GITERR_NET, "The pack doesn't start with the signature"); |
| return -1; |
| } |
| |
| if (git_indexer_stream_new(&idx, git_repository_path(repo)) < 0) |
| return -1; |
| |
| memset(stats, 0, sizeof(git_indexer_stats)); |
| if (git_indexer_stream_add(idx, buffered, buffered_size, stats) < 0) |
| goto on_error; |
| |
| *bytes = buffered_size; |
| |
| do { |
| if (git_indexer_stream_add(idx, buf.data, buf.offset, stats) < 0) |
| goto on_error; |
| |
| gitno_consume_n(&buf, buf.offset); |
| if ((recvd = gitno_recv(&buf)) < 0) |
| goto on_error; |
| |
| *bytes += recvd; |
| } while(recvd > 0); |
| |
| if (git_indexer_stream_finalize(idx, stats)) |
| goto on_error; |
| |
| git_indexer_stream_free(idx); |
| return 0; |
| |
| on_error: |
| git_indexer_stream_free(idx); |
| return -1; |
| } |
| |
| int git_fetch_setup_walk(git_revwalk **out, git_repository *repo) |
| { |
| git_revwalk *walk; |
| git_strarray refs; |
| unsigned int i; |
| git_reference *ref; |
| |
| if (git_reference_list(&refs, repo, GIT_REF_LISTALL) < 0) |
| return -1; |
| |
| if (git_revwalk_new(&walk, repo) < 0) |
| return -1; |
| |
| git_revwalk_sorting(walk, GIT_SORT_TIME); |
| |
| for (i = 0; i < refs.count; ++i) { |
| /* No tags */ |
| if (!git__prefixcmp(refs.strings[i], GIT_REFS_TAGS_DIR)) |
| continue; |
| |
| if (git_reference_lookup(&ref, repo, refs.strings[i]) < 0) |
| goto on_error; |
| |
| if (git_reference_type(ref) == GIT_REF_SYMBOLIC) |
| continue; |
| if (git_revwalk_push(walk, git_reference_oid(ref)) < 0) |
| goto on_error; |
| |
| git_reference_free(ref); |
| } |
| |
| git_strarray_free(&refs); |
| *out = walk; |
| return 0; |
| |
| on_error: |
| git_reference_free(ref); |
| git_strarray_free(&refs); |
| return -1; |
| } |