[PATCH v6 21/35] fetch-pack: perform a fetch using v2
- From
- Brandon Williams <bmwill@google.com>
- Date
- Mar 15, 2018, 17:31 UTC
- Message-ID
- <20180315173142.176023-22-bmwill@google.com>
- In-Reply-To
- <20180315173142.176023-1-bmwill@google.com>
When communicating with a v2 server, perform a fetch by requesting the 'fetch' command.
Signed-off-by: Brandon Williams <bmwill@google.com> --- Documentation/technical/protocol-v2.txt | 67 +++++- builtin/fetch-pack.c | 2 +- fetch-pack.c | 270 +++++++++++++++++++++++- fetch-pack.h | 4 +- serve.c | 2 +- t/t5701-git-serve.sh | 2 +- t/t5702-protocol-v2.sh | 97 +++++++++ transport.c | 7 +- upload-pack.c | 141 ++++++++++--- upload-pack.h | 4 + 10 files changed, 548 insertions(+), 48 deletions(-)
diff --git a/Documentation/technical/protocol-v2.txt b/Documentation/technical/protocol-v2.txt index 307dc1489b..4f7f251569 100644 --- a/Documentation/technical/protocol-v2.txt +++ b/Documentation/technical/protocol-v2.txt @@ -255,12 +255,43 @@ A `fetch` request can take the following arguments: to its base by position in pack rather than by an oid. That is, they can read OBJ_OFS_DELTA (ake type 6) in a packfile. + shallow <oid> + A client must notify the server of all commits for which it only + has shallow copies (meaning that it doesn't have the parents of + a commit) by supplying a 'shallow <oid>' line for each such + object so that the server is aware of the limitations of the + client's history. This is so that the server is aware that the + client may not have all objects reachable from such commits. + + deepen <depth> + Requests that the fetch/clone should be shallow having a commit + depth of <depth> relative to the remote side. + + deepen-relative + Requests that the semantics of the "deepen" command be changed + to indicate that the depth requested is relative to the client's + current shallow boundary, instead of relative to the requested + commits. + + deepen-since <timestamp> + Requests that the shallow clone/fetch should be cut at a + specific time, instead of depth. Internally it's equivalent to + doing "git rev-list --max-age=<timestamp>". Cannot be used with + "deepen". + + deepen-not <rev> + Requests that the shallow clone/fetch should be cut at a + specific revision specified by '<rev>', instead of a depth. + Internally it's equivalent of doing "git rev-list --not <rev>". + Cannot be used with "deepen", but can be used with + "deepen-since". + The response of `fetch` is broken into a number of sections separated by delimiter packets (0001), with each section beginning with its section header. output = *section - section = (acknowledgments | packfile) + section = (acknowledgments | shallow-info | packfile) (flush-pkt | delim-pkt) acknowledgments = PKT-LINE("acknowledgments" LF) @@ -270,6 +301,11 @@ header. nak = PKT-LINE("NAK" LF) ack = PKT-LINE("ACK" SP obj-id LF) + shallow-info = PKT-LINE("shallow-info" LF) + *PKT-LINE((shallow | unshallow) LF) + shallow = "shallow" SP obj-id + unshallow = "unshallow" SP obj-id + packfile = PKT-LINE("packfile" LF) *PKT-LINE(%x01-03 *%x00-ff) @@ -301,6 +337,35 @@ header. determined the objects it plans to send to the client and no further negotiation is needed. + shallow-info section + If the client has requested a shallow fetch/clone, a shallow + client requests a fetch or the server is shallow then the + server's response may include a shallow-info section. The + shallow-info section will be included if (due to one of the + above conditions) the server needs to inform the client of any + shallow boundaries or adjustments to the clients already + existing shallow boundaries. + + * Always begins with the section header "shallow-info" + + * If a positive depth is requested, the server will compute the + set of commits which are no deeper than the desired depth. + + * The server sends a "shallow obj-id" line for each commit whose + parents will not be sent in the following packfile. + + * The server sends an "unshallow obj-id" line for each commit + which the client has indicated is shallow, but is no longer + shallow as a result of the fetch (due to its parents being + sent in the following packfile). + + * The server MUST NOT send any "unshallow" lines for anything + which the client has not indicated was shallow as a part of + its request. + + * This section is only included if a packfile section is also + included in the response. + packfile section * This section is only included if the client has sent 'want' lines in its request and either requested that no more diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c index b2374ddbbf..f9d7d0b5a5 100644 --- a/builtin/fetch-pack.c +++ b/builtin/fetch-pack.c @@ -212,7 +212,7 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix) } ref = fetch_pack(&args, fd, conn, ref, dest, sought, nr_sought, - &shallow, pack_lockfile_ptr); + &shallow, pack_lockfile_ptr, protocol_v0); if (pack_lockfile) { printf("lock %s\n", pack_lockfile); fflush(stdout); diff --git a/fetch-pack.c b/fetch-pack.c index 9f6b07ad91..dffcfd66a5 100644 --- a/fetch-pack.c +++ b/fetch-pack.c @@ -303,9 +303,9 @@ static void insert_one_alternate_object(struct object *obj) #define PIPESAFE_FLUSH 32 #define LARGE_FLUSH 16384 -static int next_flush(struct fetch_pack_args *args, int count) +static int next_flush(int stateless_rpc, int count) { - if (args->stateless_rpc) { + if (stateless_rpc) { if (count < LARGE_FLUSH) count <<= 1; else @@ -461,7 +461,7 @@ static int find_common(struct fetch_pack_args *args, send_request(args, fd[1], &req_buf); strbuf_setlen(&req_buf, state_len); flushes++; - flush_at = next_flush(args, count); + flush_at = next_flush(args->stateless_rpc, count); /* * We keep one window "ahead" of the other side, and @@ -1008,6 +1008,259 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args, return ref; } +static void add_wants(const struct ref *wants, struct strbuf *req_buf) +{ + for ( ; wants ; wants = wants->next) { + const struct object_id *remote = &wants->old_oid; + const char *remote_hex; + struct object *o; + + /* + * If that object is complete (i.e. it is an ancestor of a + * local ref), we tell them we have it but do not have to + * tell them about its ancestors, which they already know + * about. + * + * 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. + */ + if (((o = lookup_object(remote->hash)) != NULL) && + (o->flags & COMPLETE)) { + continue; + } + + remote_hex = oid_to_hex(remote); + packet_buf_write(req_buf, "want %s\n", remote_hex); + } +} + +static void add_common(struct strbuf *req_buf, struct oidset *common) +{ + struct oidset_iter iter; + const struct object_id *oid; + oidset_iter_init(common, &iter); + + while ((oid = oidset_iter_next(&iter))) { + packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid)); + } +} + +static int add_haves(struct strbuf *req_buf, int *haves_to_send, int *in_vain) +{ + int ret = 0; + int haves_added = 0; + const struct object_id *oid; + + while ((oid = get_rev())) { + packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid)); + if (++haves_added >= *haves_to_send) + break; + } + + *in_vain += haves_added; + if (!haves_added || *in_vain >= MAX_IN_VAIN) { + /* Send Done */ + packet_buf_write(req_buf, "done\n"); + ret = 1; + } + + /* Increase haves to send on next round */ + *haves_to_send = next_flush(1, *haves_to_send); + + return ret; +} + +static int send_fetch_request(int fd_out, const struct fetch_pack_args *args, + const struct ref *wants, struct oidset *common, + int *haves_to_send, int *in_vain) +{ + int ret = 0; + struct strbuf req_buf = STRBUF_INIT; + + if (server_supports_v2("fetch", 1)) + packet_buf_write(&req_buf, "command=fetch"); + if (server_supports_v2("agent", 0)) + packet_buf_write(&req_buf, "agent=%s", git_user_agent_sanitized()); + + packet_buf_delim(&req_buf); + if (args->use_thin_pack) + packet_buf_write(&req_buf, "thin-pack"); + if (args->no_progress) + packet_buf_write(&req_buf, "no-progress"); + if (args->include_tag) + packet_buf_write(&req_buf, "include-tag"); + if (prefer_ofs_delta) + packet_buf_write(&req_buf, "ofs-delta"); + + /* add wants */ + add_wants(wants, &req_buf); + + /* Add all of the common commits we've found in previous rounds */ + add_common(&req_buf, common); + + /* Add initial haves */ + ret = add_haves(&req_buf, haves_to_send, in_vain); + + /* Send request */ + packet_buf_flush(&req_buf); + write_or_die(fd_out, req_buf.buf, req_buf.len); + + strbuf_release(&req_buf); + return ret; +} + +/* + * Processes a section header in a server's response and checks if it matches + * `section`. If the value of `peek` is 1, the header line will be peeked (and + * not consumed); if 0, the line will be consumed and the function will die if + * the section header doesn't match what was expected. + */ +static int process_section_header(struct packet_reader *reader, + const char *section, int peek) +{ + int ret; + + if (packet_reader_peek(reader) != PACKET_READ_NORMAL) + die("error reading packet"); + + ret = !strcmp(reader->line, section); + + if (!peek) { + if (!ret) + die("expected '%s', received '%s'", + section, reader->line); + packet_reader_read(reader); + } + + return ret; +} + +static int process_acks(struct packet_reader *reader, struct oidset *common) +{ + /* received */ + int received_ready = 0; + int received_ack = 0; + + process_section_header(reader, "acknowledgments", 0); + while (packet_reader_read(reader) == PACKET_READ_NORMAL) { + const char *arg; + + if (!strcmp(reader->line, "NAK")) + continue; + + if (skip_prefix(reader->line, "ACK ", &arg)) { + struct object_id oid; + if (!get_oid_hex(arg, &oid)) { + struct commit *commit; + oidset_insert(common, &oid); + commit = lookup_commit(&oid); + mark_common(commit, 0, 1); + } + continue; + } + + if (!strcmp(reader->line, "ready")) { + clear_prio_queue(&rev_list); + received_ready = 1; + continue; + } + + die("unexpected acknowledgment line: '%s'", reader->line); + } + + if (reader->status != PACKET_READ_FLUSH && + reader->status != PACKET_READ_DELIM) + die("error processing acks: %d", reader->status); + + /* return 0 if no common, 1 if there are common, or 2 if ready */ + return received_ready ? 2 : (received_ack ? 1 : 0); +} + +enum fetch_state { + FETCH_CHECK_LOCAL = 0, + FETCH_SEND_REQUEST, + FETCH_PROCESS_ACKS, + FETCH_GET_PACK, + FETCH_DONE, +}; + +static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args, + int fd[2], + const struct ref *orig_ref, + struct ref **sought, int nr_sought, + char **pack_lockfile) +{ + struct ref *ref = copy_ref_list(orig_ref); + enum fetch_state state = FETCH_CHECK_LOCAL; + struct oidset common = OIDSET_INIT; + struct packet_reader reader; + int in_vain = 0; + int haves_to_send = INITIAL_FLUSH; + packet_reader_init(&reader, fd[0], NULL, 0, + PACKET_READ_CHOMP_NEWLINE); + + while (state != FETCH_DONE) { + switch (state) { + case FETCH_CHECK_LOCAL: + sort_ref_list(&ref, ref_compare_name); + QSORT(sought, nr_sought, cmp_ref_by_name); + + /* v2 supports these by default */ + allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1; + use_sideband = 2; + + if (marked) + for_each_ref(clear_marks, NULL); + marked = 1; + + for_each_ref(rev_list_insert_ref_oid, NULL); + for_each_cached_alternate(insert_one_alternate_object); + + /* Filter 'ref' by 'sought' and those that aren't local */ + if (everything_local(args, &ref, sought, nr_sought)) + state = FETCH_DONE; + else + state = FETCH_SEND_REQUEST; + break; + case FETCH_SEND_REQUEST: + if (send_fetch_request(fd[1], args, ref, &common, + &haves_to_send, &in_vain)) + state = FETCH_GET_PACK; + else + state = FETCH_PROCESS_ACKS; + break; + case FETCH_PROCESS_ACKS: + /* Process ACKs/NAKs */ + switch (process_acks(&reader, &common)) { + case 2: + state = FETCH_GET_PACK; + break; + case 1: + in_vain = 0; + /* fallthrough */ + default: + state = FETCH_SEND_REQUEST; + break; + } + break; + case FETCH_GET_PACK: + /* get the pack */ + process_section_header(&reader, "packfile", 0); + if (get_pack(args, fd, pack_lockfile)) + die(_("git fetch-pack: fetch failed.")); + + state = FETCH_DONE; + break; + case FETCH_DONE: + continue; + } + } + + oidset_clear(&common); + return ref; +} + static void fetch_pack_config(void) { git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit); @@ -1153,7 +1406,8 @@ struct ref *fetch_pack(struct fetch_pack_args *args, const char *dest, struct ref **sought, int nr_sought, struct oid_array *shallow, - char **pack_lockfile) + char **pack_lockfile, + enum protocol_version version) { struct ref *ref_cpy; struct shallow_info si; @@ -1167,8 +1421,12 @@ struct ref *fetch_pack(struct fetch_pack_args *args, die(_("no matching remote head")); } prepare_shallow_info(&si, shallow); - ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought, - &si, pack_lockfile); + if (version == protocol_v2) + ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought, + pack_lockfile); + else + ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought, + &si, pack_lockfile); reprepare_packed_git(); update_shallow(args, sought, nr_sought, &si); clear_shallow_info(&si); diff --git a/fetch-pack.h b/fetch-pack.h index b6aeb43a8e..7afca73056 100644 --- a/fetch-pack.h +++ b/fetch-pack.h @@ -3,6 +3,7 @@ #include "string-list.h" #include "run-command.h" +#include "protocol.h" struct oid_array; @@ -43,7 +44,8 @@ struct ref *fetch_pack(struct fetch_pack_args *args, struct ref **sought, int nr_sought, struct oid_array *shallow, - char **pack_lockfile); + char **pack_lockfile, + enum protocol_version version); /* * Print an appropriate error message for each sought ref that wasn't diff --git a/serve.c b/serve.c index 3692dda801..a5a7b2f7dd 100644 --- a/serve.c +++ b/serve.c @@ -55,7 +55,7 @@ struct protocol_capability { static struct protocol_capability capabilities[] = { { "agent", agent_advertise, NULL }, { "ls-refs", always_advertise, ls_refs }, - { "fetch", always_advertise, upload_pack_v2 }, + { "fetch", upload_pack_advertise, upload_pack_v2 }, }; static void advertise_capabilities(void) diff --git a/t/t5701-git-serve.sh b/t/t5701-git-serve.sh index 888a700443..72d7bc5628 100755 --- a/t/t5701-git-serve.sh +++ b/t/t5701-git-serve.sh @@ -9,7 +9,7 @@ test_expect_success 'test capability advertisement' ' version 2 agent=git/$(git version | cut -d" " -f3) ls-refs - fetch + fetch=shallow 0000 EOF diff --git a/t/t5702-protocol-v2.sh b/t/t5702-protocol-v2.sh index 562610fd25..4365ac2736 100755 --- a/t/t5702-protocol-v2.sh +++ b/t/t5702-protocol-v2.sh @@ -45,6 +45,56 @@ test_expect_success 'ref advertisment is filtered with ls-remote using protocol test_cmp actual expect ' +test_expect_success 'clone with git:// using protocol v2' ' + test_when_finished "rm -f log" && + + GIT_TRACE_PACKET="$(pwd)/log" git -c protocol.version=2 \ + clone "$GIT_DAEMON_URL/parent" daemon_child && + + git -C daemon_child log -1 --format=%s >actual && + git -C "$daemon_parent" log -1 --format=%s >expect && + test_cmp expect actual && + + # Client requested to use protocol v2 + grep "clone> .*\\\0\\\0version=2\\\0$" log && + # Server responded using protocol v2 + grep "clone< version 2" log +' + +test_expect_success 'fetch with git:// using protocol v2' ' + test_when_finished "rm -f log" && + + test_commit -C "$daemon_parent" two && + + GIT_TRACE_PACKET="$(pwd)/log" git -C daemon_child -c protocol.version=2 \ + fetch && + + git -C daemon_child log -1 --format=%s origin/master >actual && + git -C "$daemon_parent" log -1 --format=%s >expect && + test_cmp expect actual && + + # Client requested to use protocol v2 + grep "fetch> .*\\\0\\\0version=2\\\0$" log && + # Server responded using protocol v2 + grep "fetch< version 2" log +' + +test_expect_success 'pull with git:// using protocol v2' ' + test_when_finished "rm -f log" && + + GIT_TRACE_PACKET="$(pwd)/log" git -C daemon_child -c protocol.version=2 \ + pull && + + git -C daemon_child log -1 --format=%s >actual && + git -C "$daemon_parent" log -1 --format=%s >expect && + test_cmp expect actual && + + # Client requested to use protocol v2 + grep "fetch> .*\\\0\\\0version=2\\\0$" log && + # Server responded using protocol v2 + grep "fetch< version 2" log +' + stop_git_daemon # Test protocol v2 with 'file://' transport @@ -80,4 +130,51 @@ test_expect_success 'ref advertisment is filtered with ls-remote using protocol test_cmp actual expect ' +test_expect_success 'clone with file:// using protocol v2' ' + test_when_finished "rm -f log" && + + GIT_TRACE_PACKET="$(pwd)/log" git -c protocol.version=2 \ + clone "file://$(pwd)/file_parent" file_child && + + git -C file_child log -1 --format=%s >actual && + git -C file_parent log -1 --format=%s >expect && + test_cmp expect actual && + + # Server responded using protocol v2 + grep "clone< version 2" log +' + +test_expect_success 'fetch with file:// using protocol v2' ' + test_when_finished "rm -f log" && + + test_commit -C file_parent two && + + GIT_TRACE_PACKET="$(pwd)/log" git -C file_child -c protocol.version=2 \ + fetch origin && + + git -C file_child log -1 --format=%s origin/master >actual && + git -C file_parent log -1 --format=%s >expect && + test_cmp expect actual && + + # Server responded using protocol v2 + grep "fetch< version 2" log +' + +test_expect_success 'ref advertisment is filtered during fetch using protocol v2' ' + test_when_finished "rm -f log" && + + test_commit -C file_parent three && + + GIT_TRACE_PACKET="$(pwd)/log" git -C file_child -c protocol.version=2 \ + fetch origin master && + + git -C file_child log -1 --format=%s origin/master >actual && + git -C file_parent log -1 --format=%s >expect && + test_cmp expect actual && + + ! grep "refs/tags/one" log && + ! grep "refs/tags/two" log && + ! grep "refs/tags/three" log +' + test_done diff --git a/transport.c b/transport.c index 57bdbb59bc..9152a45b38 100644 --- a/transport.c +++ b/transport.c @@ -258,14 +258,17 @@ static int fetch_refs_via_pack(struct transport *transport, switch (data->version) { case protocol_v2: - die("support for protocol v2 not implemented yet"); + refs = fetch_pack(&args, data->fd, data->conn, + refs_tmp ? refs_tmp : transport->remote_refs, + dest, to_fetch, nr_heads, &data->shallow, + &transport->pack_lockfile, data->version); break; case protocol_v1: case protocol_v0: refs = fetch_pack(&args, data->fd, data->conn, refs_tmp ? refs_tmp : transport->remote_refs, dest, to_fetch, nr_heads, &data->shallow, - &transport->pack_lockfile); + &transport->pack_lockfile, data->version); break; case protocol_unknown_version: BUG("unknown protocol version"); diff --git a/upload-pack.c b/upload-pack.c index 198e9f046b..4c9428c2db 100644 --- a/upload-pack.c +++ b/upload-pack.c @@ -710,7 +710,6 @@ static void deepen(int depth, int deepen_relative, } send_unshallow(shallows); - packet_flush(1); } static void deepen_by_rev_list(int ac, const char **av, @@ -722,7 +721,53 @@ static void deepen_by_rev_list(int ac, const char **av, send_shallow(result); free_commit_list(result); send_unshallow(shallows); - packet_flush(1); +} + +/* Returns 1 if a shallow list is sent or 0 otherwise */ +static int send_shallow_list(int depth, int deepen_rev_list, + timestamp_t deepen_since, + struct string_list *deepen_not, + struct object_array *shallows) +{ + int ret = 0; + + if (depth > 0 && deepen_rev_list) + die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together"); + if (depth > 0) { + deepen(depth, deepen_relative, shallows); + ret = 1; + } else if (deepen_rev_list) { + struct argv_array av = ARGV_ARRAY_INIT; + int i; + + argv_array_push(&av, "rev-list"); + if (deepen_since) + argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since); + if (deepen_not->nr) { + argv_array_push(&av, "--not"); + for (i = 0; i < deepen_not->nr; i++) { + struct string_list_item *s = deepen_not->items + i; + argv_array_push(&av, s->string); + } + argv_array_push(&av, "--not"); + } + for (i = 0; i < want_obj.nr; i++) { + struct object *o = want_obj.objects[i].item; + argv_array_push(&av, oid_to_hex(&o->oid)); + } + deepen_by_rev_list(av.argc, av.argv, shallows); + argv_array_clear(&av); + ret = 1; + } else { + if (shallows->nr > 0) { + int i; + for (i = 0; i < shallows->nr; i++) + register_shallow(&shallows->objects[i].item->oid); + } + } + + shallow_nr += shallows->nr; + return ret; } static int process_shallow(const char *line, struct object_array *shallows) @@ -884,40 +929,10 @@ static void receive_needs(void) if (depth == 0 && !deepen_rev_list && shallows.nr == 0) return; - if (depth > 0 && deepen_rev_list) - die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together"); - if (depth > 0) - deepen(depth, deepen_relative, &shallows); - else if (deepen_rev_list) { - struct argv_array av = ARGV_ARRAY_INIT; - int i; - argv_array_push(&av, "rev-list"); - if (deepen_since) - argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since); - if (deepen_not.nr) { - argv_array_push(&av, "--not"); - for (i = 0; i < deepen_not.nr; i++) { - struct string_list_item *s = deepen_not.items + i; - argv_array_push(&av, s->string); - } - argv_array_push(&av, "--not"); - } - for (i = 0; i < want_obj.nr; i++) { - struct object *o = want_obj.objects[i].item; - argv_array_push(&av, oid_to_hex(&o->oid)); - } - deepen_by_rev_list(av.argc, av.argv, &shallows); - argv_array_clear(&av); - } - else - if (shallows.nr > 0) { - int i; - for (i = 0; i < shallows.nr; i++) - register_shallow(&shallows.objects[i].item->oid); - } - - shallow_nr += shallows.nr; + if (send_shallow_list(depth, deepen_rev_list, deepen_since, + &deepen_not, &shallows)) + packet_flush(1); object_array_clear(&shallows); } @@ -1071,6 +1086,13 @@ struct upload_pack_data { struct object_array wants; struct oid_array haves; + struct object_array shallows; + struct string_list deepen_not; + int depth; + timestamp_t deepen_since; + int deepen_rev_list; + int deepen_relative; + unsigned stateless_rpc : 1; unsigned use_thin_pack : 1; @@ -1084,16 +1106,22 @@ static void upload_pack_data_init(struct upload_pack_data *data) { struct object_array wants = OBJECT_ARRAY_INIT; struct oid_array haves = OID_ARRAY_INIT; + struct object_array shallows = OBJECT_ARRAY_INIT; + struct string_list deepen_not = STRING_LIST_INIT_DUP; memset(data, 0, sizeof(*data)); data->wants = wants; data->haves = haves; + data->shallows = shallows; + data->deepen_not = deepen_not; } static void upload_pack_data_clear(struct upload_pack_data *data) { object_array_clear(&data->wants); oid_array_clear(&data->haves); + object_array_clear(&data->shallows); + string_list_clear(&data->deepen_not, 0); } static int parse_want(const char *line) @@ -1177,6 +1205,22 @@ static void process_args(struct packet_reader *request, continue; } + /* Shallow related arguments */ + if (process_shallow(arg, &data->shallows)) + continue; + if (process_deepen(arg, &data->depth)) + continue; + if (process_deepen_since(arg, &data->deepen_since, + &data->deepen_rev_list)) + continue; + if (process_deepen_not(arg, &data->deepen_not, + &data->deepen_rev_list)) + continue; + if (!strcmp(arg, "deepen-relative")) { + data->deepen_relative = 1; + continue; + } + /* ignore unknown lines maybe? */ die("unexpect line: '%s'", arg); } @@ -1272,6 +1316,23 @@ static int process_haves_and_send_acks(struct upload_pack_data *data) return ret; } +static void send_shallow_info(struct upload_pack_data *data) +{ + /* No shallow info needs to be sent */ + if (!data->depth && !data->deepen_rev_list && !data->shallows.nr && + !is_repository_shallow()) + return; + + packet_write_fmt(1, "shallow-info\n"); + + if (!send_shallow_list(data->depth, data->deepen_rev_list, + data->deepen_since, &data->deepen_not, + &data->shallows) && is_repository_shallow()) + deepen(INFINITE_DEPTH, data->deepen_relative, &data->shallows); + + packet_delim(1); +} + enum fetch_state { FETCH_PROCESS_ARGS = 0, FETCH_SEND_ACKS, @@ -1319,6 +1380,8 @@ int upload_pack_v2(struct repository *r, struct argv_array *keys, state = FETCH_DONE; break; case FETCH_SEND_PACK: + send_shallow_info(&data); + packet_write_fmt(1, "packfile\n"); create_pack_file(); state = FETCH_DONE; @@ -1331,3 +1394,11 @@ int upload_pack_v2(struct repository *r, struct argv_array *keys, upload_pack_data_clear(&data); return 0; } + +int upload_pack_advertise(struct repository *r, + struct strbuf *value) +{ + if (value) + strbuf_addstr(value, "shallow"); + return 1; +} diff --git a/upload-pack.h b/upload-pack.h index 5bbdb7e445..cab2178796 100644 --- a/upload-pack.h +++ b/upload-pack.h @@ -16,4 +16,8 @@ struct packet_reader; extern int upload_pack_v2(struct repository *r, struct argv_array *keys, struct packet_reader *request); +struct strbuf; +extern int upload_pack_advertise(struct repository *r, + struct strbuf *value); + #endif /* UPLOAD_PACK_H */
-- 2.16.2.804.g6dcf76e118-goog