diff --git a/fetch-pack.c b/fetch-pack.c index 53914563b5..49ab2666b9 100644 --- a/fetch-pack.c +++ b/fetch-pack.c @@ -253,8 +253,10 @@ static int find_common(struct fetch_negotiator *negotiator, if (args->stateless_rpc && multi_ack == 1) die(_("--stateless-rpc requires multi_ack_detailed")); - mark_tips(negotiator, args->negotiation_tips); - for_each_cached_alternate(negotiator, insert_one_alternate_object); + if (!args->no_dependents) { + mark_tips(negotiator, args->negotiation_tips); + for_each_cached_alternate(negotiator, insert_one_alternate_object); + } fetching = 0; for ( ; refs ; refs = refs->next) { @@ -271,8 +273,12 @@ static int find_common(struct fetch_negotiator *negotiator, * We use lookup_object here because we are only * interested in the case we *know* the object is * reachable and we have already scanned it. + * + * Do this only if args->no_dependents is false (if it is true, + * we cannot trust the object flags). */ - if (((o = lookup_object(the_repository, remote->hash)) != NULL) && + if (!args->no_dependents && + ((o = lookup_object(the_repository, remote->hash)) != NULL) && (o->flags & COMPLETE)) { continue; } @@ -707,31 +713,29 @@ static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator, oidset_clear(&loose_oid_set); - if (!args->no_dependents) { - if (!args->deepen) { - for_each_ref(mark_complete_oid, NULL); - for_each_cached_alternate(NULL, mark_alternate_complete); - commit_list_sort_by_date(&complete); - if (cutoff) - mark_recent_complete_commits(args, cutoff); - } + if (!args->deepen) { + for_each_ref(mark_complete_oid, NULL); + for_each_cached_alternate(NULL, mark_alternate_complete); + commit_list_sort_by_date(&complete); + if (cutoff) + mark_recent_complete_commits(args, cutoff); + } - /* - * Mark all complete remote refs as common refs. - * Don't mark them common yet; the server has to be told so first. - */ - for (ref = *refs; ref; ref = ref->next) { - struct object *o = deref_tag(the_repository, - lookup_object(the_repository, - ref->old_oid.hash), - NULL, 0); + /* + * Mark all complete remote refs as common refs. + * Don't mark them common yet; the server has to be told so first. + */ + for (ref = *refs; ref; ref = ref->next) { + struct object *o = deref_tag(the_repository, + lookup_object(the_repository, + ref->old_oid.hash), + NULL, 0); - if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE)) - continue; + if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE)) + continue; - negotiator->known_common(negotiator, - (struct commit *)o); - } + negotiator->known_common(negotiator, + (struct commit *)o); } save_commit_buffer = old_save_commit_buffer; @@ -987,11 +991,15 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args, if (!server_supports("deepen-relative") && args->deepen_relative) die(_("Server does not support --deepen")); - mark_complete_and_common_ref(&negotiator, args, &ref); - filter_refs(args, &ref, sought, nr_sought); - if (everything_local(args, &ref)) { - packet_flush(fd[1]); - goto all_done; + if (!args->no_dependents) { + mark_complete_and_common_ref(&negotiator, args, &ref); + filter_refs(args, &ref, sought, nr_sought); + if (everything_local(args, &ref)) { + packet_flush(fd[1]); + goto all_done; + } + } else { + filter_refs(args, &ref, sought, nr_sought); } if (find_common(&negotiator, args, fd, &oid, ref) < 0) if (!args->keep_pack) @@ -1037,7 +1045,7 @@ static void add_shallow_requests(struct strbuf *req_buf, } } -static void add_wants(const struct ref *wants, struct strbuf *req_buf) +static void add_wants(int no_dependents, const struct ref *wants, struct strbuf *req_buf) { int use_ref_in_want = server_supports_feature("fetch", "ref-in-want", 0); @@ -1054,8 +1062,12 @@ static void add_wants(const struct ref *wants, struct strbuf *req_buf) * We use lookup_object here because we are only * interested in the case we *know* the object is * reachable and we have already scanned it. + * + * Do this only if args->no_dependents is false (if it is true, + * we cannot trust the object flags). */ - if (((o = lookup_object(the_repository, remote->hash)) != NULL) && + if (!no_dependents && + ((o = lookup_object(the_repository, remote->hash)) != NULL) && (o->flags & COMPLETE)) { continue; } @@ -1152,7 +1164,7 @@ static int send_fetch_request(struct fetch_negotiator *negotiator, int fd_out, } /* add wants */ - add_wants(wants, &req_buf); + add_wants(args->no_dependents, wants, &req_buf); if (args->no_dependents) { packet_buf_write(&req_buf, "done"); @@ -1343,16 +1355,21 @@ static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args, args->deepen = 1; /* Filter 'ref' by 'sought' and those that aren't local */ - mark_complete_and_common_ref(&negotiator, args, &ref); - filter_refs(args, &ref, sought, nr_sought); - if (everything_local(args, &ref)) - state = FETCH_DONE; - else - state = FETCH_SEND_REQUEST; + if (!args->no_dependents) { + mark_complete_and_common_ref(&negotiator, args, &ref); + filter_refs(args, &ref, sought, nr_sought); + if (everything_local(args, &ref)) + state = FETCH_DONE; + else + state = FETCH_SEND_REQUEST; - mark_tips(&negotiator, args->negotiation_tips); - for_each_cached_alternate(&negotiator, - insert_one_alternate_object); + mark_tips(&negotiator, args->negotiation_tips); + for_each_cached_alternate(&negotiator, + insert_one_alternate_object); + } else { + filter_refs(args, &ref, sought, nr_sought); + state = FETCH_SEND_REQUEST; + } break; case FETCH_SEND_REQUEST: if (send_fetch_request(&negotiator, fd[1], args, ref, @@ -1595,6 +1612,20 @@ struct ref *fetch_pack(struct fetch_pack_args *args, if (nr_sought) nr_sought = remove_duplicates_in_refs(sought, nr_sought); + if (args->no_dependents && !args->filter_options.choice) { + /* + * The protocol does not support requesting that only the + * wanted objects be sent, so approximate this by setting a + * "blob:none" filter if no filter is already set. This works + * for all object types: note that wanted blobs will still be + * sent because they are directly specified as a "want". + * + * NEEDSWORK: Add an option in the protocol to request that + * only the wanted objects be sent, and implement it. + */ + parse_list_objects_filter(&args->filter_options, "blob:none"); + } + if (!ref) { packet_flush(fd[1]); die(_("no matching remote head")); diff --git a/fetch-pack.h b/fetch-pack.h index 5b6e868802..43ec344d95 100644 --- a/fetch-pack.h +++ b/fetch-pack.h @@ -43,6 +43,13 @@ struct fetch_pack_args { unsigned from_promisor:1; /* + * Attempt to fetch only the wanted objects, and not any objects + * referred to by them. Due to protocol limitations, extraneous + * objects may still be included. (When fetching non-blob + * objects, only blobs are excluded; when fetching a blob, the + * blob itself will still be sent. The client does not need to + * know whether a wanted object is a blob or not.) + * * If 1, fetch_pack() will also not modify any object flags. * This allows fetch_pack() to safely be called by any function, * regardless of which object flags it uses (if any). diff --git a/t/t0410-partial-clone.sh b/t/t0410-partial-clone.sh index cfd0655ea1..c521d7d6c6 100755 --- a/t/t0410-partial-clone.sh +++ b/t/t0410-partial-clone.sh @@ -182,6 +182,47 @@ test_expect_success 'fetching of missing objects works with ref-in-want enabled' grep "git< fetch=.*ref-in-want" trace ' +test_expect_success 'fetching of missing blobs works' ' + rm -rf server repo && + test_create_repo server && + test_commit -C server foo && + git -C server repack -a -d --write-bitmap-index && + + git clone "file://$(pwd)/server" repo && + git hash-object repo/foo.t >blobhash && + rm -rf repo/.git/objects/* && + + git -C server config uploadpack.allowanysha1inwant 1 && + git -C server config uploadpack.allowfilter 1 && + git -C repo config core.repositoryformatversion 1 && + git -C repo config extensions.partialclone "origin" && + + git -C repo cat-file -p $(cat blobhash) +' + +test_expect_success 'fetching of missing trees does not fetch blobs' ' + rm -rf server repo && + test_create_repo server && + test_commit -C server foo && + git -C server repack -a -d --write-bitmap-index && + + git clone "file://$(pwd)/server" repo && + git -C repo rev-parse foo^{tree} >treehash && + git hash-object repo/foo.t >blobhash && + rm -rf repo/.git/objects/* && + + git -C server config uploadpack.allowanysha1inwant 1 && + git -C server config uploadpack.allowfilter 1 && + git -C repo config core.repositoryformatversion 1 && + git -C repo config extensions.partialclone "origin" && + git -C repo cat-file -p $(cat treehash) && + + # Ensure that the tree, but not the blob, is fetched + git -C repo rev-list --objects --missing=print $(cat treehash) >objects && + grep "^$(cat treehash)" objects && + grep "^[?]$(cat blobhash)" objects +' + test_expect_success 'rev-list stops traversal at missing and promised commit' ' rm -rf repo && test_create_repo repo &&