| #include "cache.h" |
| #include "lockfile.h" |
| #include "refs.h" |
| #include "pkt-line.h" |
| #include "commit.h" |
| #include "tag.h" |
| #include "exec_cmd.h" |
| #include "pack.h" |
| #include "sideband.h" |
| #include "fetch-pack.h" |
| #include "remote.h" |
| #include "run-command.h" |
| #include "connect.h" |
| #include "transport.h" |
| #include "version.h" |
| #include "prio-queue.h" |
| #include "sha1-array.h" |
| |
| static int transfer_unpack_limit = -1; |
| static int fetch_unpack_limit = -1; |
| static int unpack_limit = 100; |
| static int prefer_ofs_delta = 1; |
| static int no_done; |
| static int deepen_since_ok; |
| static int deepen_not_ok; |
| static int fetch_fsck_objects = -1; |
| static int transfer_fsck_objects = -1; |
| static int agent_supported; |
| static struct lock_file shallow_lock; |
| static const char *alternate_shallow_file; |
| |
| /* Remember to update object flag allocation in object.h */ |
| #define COMPLETE (1U << 0) |
| #define COMMON (1U << 1) |
| #define COMMON_REF (1U << 2) |
| #define SEEN (1U << 3) |
| #define POPPED (1U << 4) |
| |
| static int marked; |
| |
| /* |
| * After sending this many "have"s if we do not get any new ACK , we |
| * give up traversing our history. |
| */ |
| #define MAX_IN_VAIN 256 |
| |
| static struct prio_queue rev_list = { compare_commits_by_commit_date }; |
| static int non_common_revs, multi_ack, use_sideband; |
| /* Allow specifying sha1 if it is a ref tip. */ |
| #define ALLOW_TIP_SHA1 01 |
| /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */ |
| #define ALLOW_REACHABLE_SHA1 02 |
| static unsigned int allow_unadvertised_object_request; |
| |
| __attribute__((format (printf, 2, 3))) |
| static inline void print_verbose(const struct fetch_pack_args *args, |
| const char *fmt, ...) |
| { |
| va_list params; |
| |
| if (!args->verbose) |
| return; |
| |
| va_start(params, fmt); |
| vfprintf(stderr, fmt, params); |
| va_end(params); |
| fputc('\n', stderr); |
| } |
| |
| static void rev_list_push(struct commit *commit, int mark) |
| { |
| if (!(commit->object.flags & mark)) { |
| commit->object.flags |= mark; |
| |
| if (parse_commit(commit)) |
| return; |
| |
| prio_queue_put(&rev_list, commit); |
| |
| if (!(commit->object.flags & COMMON)) |
| non_common_revs++; |
| } |
| } |
| |
| static int rev_list_insert_ref(const char *refname, const unsigned char *sha1) |
| { |
| struct object *o = deref_tag(parse_object(sha1), refname, 0); |
| |
| if (o && o->type == OBJ_COMMIT) |
| rev_list_push((struct commit *)o, SEEN); |
| |
| return 0; |
| } |
| |
| static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid, |
| int flag, void *cb_data) |
| { |
| return rev_list_insert_ref(refname, oid->hash); |
| } |
| |
| static int clear_marks(const char *refname, const struct object_id *oid, |
| int flag, void *cb_data) |
| { |
| struct object *o = deref_tag(parse_object(oid->hash), refname, 0); |
| |
| if (o && o->type == OBJ_COMMIT) |
| clear_commit_marks((struct commit *)o, |
| COMMON | COMMON_REF | SEEN | POPPED); |
| return 0; |
| } |
| |
| /* |
| This function marks a rev and its ancestors as common. |
| In some cases, it is desirable to mark only the ancestors (for example |
| when only the server does not yet know that they are common). |
| */ |
| |
| static void mark_common(struct commit *commit, |
| int ancestors_only, int dont_parse) |
| { |
| if (commit != NULL && !(commit->object.flags & COMMON)) { |
| struct object *o = (struct object *)commit; |
| |
| if (!ancestors_only) |
| o->flags |= COMMON; |
| |
| if (!(o->flags & SEEN)) |
| rev_list_push(commit, SEEN); |
| else { |
| struct commit_list *parents; |
| |
| if (!ancestors_only && !(o->flags & POPPED)) |
| non_common_revs--; |
| if (!o->parsed && !dont_parse) |
| if (parse_commit(commit)) |
| return; |
| |
| for (parents = commit->parents; |
| parents; |
| parents = parents->next) |
| mark_common(parents->item, 0, dont_parse); |
| } |
| } |
| } |
| |
| /* |
| Get the next rev to send, ignoring the common. |
| */ |
| |
| static const unsigned char *get_rev(void) |
| { |
| struct commit *commit = NULL; |
| |
| while (commit == NULL) { |
| unsigned int mark; |
| struct commit_list *parents; |
| |
| if (rev_list.nr == 0 || non_common_revs == 0) |
| return NULL; |
| |
| commit = prio_queue_get(&rev_list); |
| parse_commit(commit); |
| parents = commit->parents; |
| |
| commit->object.flags |= POPPED; |
| if (!(commit->object.flags & COMMON)) |
| non_common_revs--; |
| |
| if (commit->object.flags & COMMON) { |
| /* do not send "have", and ignore ancestors */ |
| commit = NULL; |
| mark = COMMON | SEEN; |
| } else if (commit->object.flags & COMMON_REF) |
| /* send "have", and ignore ancestors */ |
| mark = COMMON | SEEN; |
| else |
| /* send "have", also for its ancestors */ |
| mark = SEEN; |
| |
| while (parents) { |
| if (!(parents->item->object.flags & SEEN)) |
| rev_list_push(parents->item, mark); |
| if (mark & COMMON) |
| mark_common(parents->item, 1, 0); |
| parents = parents->next; |
| } |
| } |
| |
| return commit->object.oid.hash; |
| } |
| |
| enum ack_type { |
| NAK = 0, |
| ACK, |
| ACK_continue, |
| ACK_common, |
| ACK_ready |
| }; |
| |
| static void consume_shallow_list(struct fetch_pack_args *args, int fd) |
| { |
| if (args->stateless_rpc && args->deepen) { |
| /* If we sent a depth we will get back "duplicate" |
| * shallow and unshallow commands every time there |
| * is a block of have lines exchanged. |
| */ |
| char *line; |
| while ((line = packet_read_line(fd, NULL))) { |
| if (starts_with(line, "shallow ")) |
| continue; |
| if (starts_with(line, "unshallow ")) |
| continue; |
| die(_("git fetch-pack: expected shallow list")); |
| } |
| } |
| } |
| |
| static enum ack_type get_ack(int fd, unsigned char *result_sha1) |
| { |
| int len; |
| char *line = packet_read_line(fd, &len); |
| const char *arg; |
| |
| if (!len) |
| die(_("git fetch-pack: expected ACK/NAK, got EOF")); |
| if (!strcmp(line, "NAK")) |
| return NAK; |
| if (skip_prefix(line, "ACK ", &arg)) { |
| if (!get_sha1_hex(arg, result_sha1)) { |
| arg += 40; |
| len -= arg - line; |
| if (len < 1) |
| return ACK; |
| if (strstr(arg, "continue")) |
| return ACK_continue; |
| if (strstr(arg, "common")) |
| return ACK_common; |
| if (strstr(arg, "ready")) |
| return ACK_ready; |
| return ACK; |
| } |
| } |
| die(_("git fetch-pack: expected ACK/NAK, got '%s'"), line); |
| } |
| |
| static void send_request(struct fetch_pack_args *args, |
| int fd, struct strbuf *buf) |
| { |
| if (args->stateless_rpc) { |
| send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX); |
| packet_flush(fd); |
| } else |
| write_or_die(fd, buf->buf, buf->len); |
| } |
| |
| static void insert_one_alternate_ref(const struct ref *ref, void *unused) |
| { |
| rev_list_insert_ref(NULL, ref->old_oid.hash); |
| } |
| |
| #define INITIAL_FLUSH 16 |
| #define PIPESAFE_FLUSH 32 |
| #define LARGE_FLUSH 16384 |
| |
| static int next_flush(struct fetch_pack_args *args, int count) |
| { |
| if (args->stateless_rpc) { |
| if (count < LARGE_FLUSH) |
| count <<= 1; |
| else |
| count = count * 11 / 10; |
| } else { |
| if (count < PIPESAFE_FLUSH) |
| count <<= 1; |
| else |
| count += PIPESAFE_FLUSH; |
| } |
| return count; |
| } |
| |
| static int find_common(struct fetch_pack_args *args, |
| int fd[2], unsigned char *result_sha1, |
| struct ref *refs) |
| { |
| int fetching; |
| int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval; |
| const unsigned char *sha1; |
| unsigned in_vain = 0; |
| int got_continue = 0; |
| int got_ready = 0; |
| struct strbuf req_buf = STRBUF_INIT; |
| size_t state_len = 0; |
| |
| if (args->stateless_rpc && multi_ack == 1) |
| die(_("--stateless-rpc requires multi_ack_detailed")); |
| if (marked) |
| for_each_ref(clear_marks, NULL); |
| marked = 1; |
| |
| for_each_ref(rev_list_insert_ref_oid, NULL); |
| for_each_alternate_ref(insert_one_alternate_ref, NULL); |
| |
| fetching = 0; |
| for ( ; refs ; refs = refs->next) { |
| unsigned char *remote = refs->old_oid.hash; |
| 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)) != NULL) && |
| (o->flags & COMPLETE)) { |
| continue; |
| } |
| |
| remote_hex = sha1_to_hex(remote); |
| if (!fetching) { |
| struct strbuf c = STRBUF_INIT; |
| if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed"); |
| if (multi_ack == 1) strbuf_addstr(&c, " multi_ack"); |
| if (no_done) strbuf_addstr(&c, " no-done"); |
| if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k"); |
| if (use_sideband == 1) strbuf_addstr(&c, " side-band"); |
| if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative"); |
| if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack"); |
| if (args->no_progress) strbuf_addstr(&c, " no-progress"); |
| if (args->include_tag) strbuf_addstr(&c, " include-tag"); |
| if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta"); |
| if (deepen_since_ok) strbuf_addstr(&c, " deepen-since"); |
| if (deepen_not_ok) strbuf_addstr(&c, " deepen-not"); |
| if (agent_supported) strbuf_addf(&c, " agent=%s", |
| git_user_agent_sanitized()); |
| packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf); |
| strbuf_release(&c); |
| } else |
| packet_buf_write(&req_buf, "want %s\n", remote_hex); |
| fetching++; |
| } |
| |
| if (!fetching) { |
| strbuf_release(&req_buf); |
| packet_flush(fd[1]); |
| return 1; |
| } |
| |
| if (is_repository_shallow()) |
| write_shallow_commits(&req_buf, 1, NULL); |
| if (args->depth > 0) |
| packet_buf_write(&req_buf, "deepen %d", args->depth); |
| if (args->deepen_since) { |
| unsigned long max_age = approxidate(args->deepen_since); |
| packet_buf_write(&req_buf, "deepen-since %lu", max_age); |
| } |
| if (args->deepen_not) { |
| int i; |
| for (i = 0; i < args->deepen_not->nr; i++) { |
| struct string_list_item *s = args->deepen_not->items + i; |
| packet_buf_write(&req_buf, "deepen-not %s", s->string); |
| } |
| } |
| packet_buf_flush(&req_buf); |
| state_len = req_buf.len; |
| |
| if (args->deepen) { |
| char *line; |
| const char *arg; |
| unsigned char sha1[20]; |
| |
| send_request(args, fd[1], &req_buf); |
| while ((line = packet_read_line(fd[0], NULL))) { |
| if (skip_prefix(line, "shallow ", &arg)) { |
| if (get_sha1_hex(arg, sha1)) |
| die(_("invalid shallow line: %s"), line); |
| register_shallow(sha1); |
| continue; |
| } |
| if (skip_prefix(line, "unshallow ", &arg)) { |
| if (get_sha1_hex(arg, sha1)) |
| die(_("invalid unshallow line: %s"), line); |
| if (!lookup_object(sha1)) |
| die(_("object not found: %s"), line); |
| /* make sure that it is parsed as shallow */ |
| if (!parse_object(sha1)) |
| die(_("error in object: %s"), line); |
| if (unregister_shallow(sha1)) |
| die(_("no shallow found: %s"), line); |
| continue; |
| } |
| die(_("expected shallow/unshallow, got %s"), line); |
| } |
| } else if (!args->stateless_rpc) |
| send_request(args, fd[1], &req_buf); |
| |
| if (!args->stateless_rpc) { |
| /* If we aren't using the stateless-rpc interface |
| * we don't need to retain the headers. |
| */ |
| strbuf_setlen(&req_buf, 0); |
| state_len = 0; |
| } |
| |
| flushes = 0; |
| retval = -1; |
| while ((sha1 = get_rev())) { |
| packet_buf_write(&req_buf, "have %s\n", sha1_to_hex(sha1)); |
| print_verbose(args, "have %s", sha1_to_hex(sha1)); |
| in_vain++; |
| if (flush_at <= ++count) { |
| int ack; |
| |
| packet_buf_flush(&req_buf); |
| send_request(args, fd[1], &req_buf); |
| strbuf_setlen(&req_buf, state_len); |
| flushes++; |
| flush_at = next_flush(args, count); |
| |
| /* |
| * We keep one window "ahead" of the other side, and |
| * will wait for an ACK only on the next one |
| */ |
| if (!args->stateless_rpc && count == INITIAL_FLUSH) |
| continue; |
| |
| consume_shallow_list(args, fd[0]); |
| do { |
| ack = get_ack(fd[0], result_sha1); |
| if (ack) |
| print_verbose(args, _("got %s %d %s"), "ack", |
| ack, sha1_to_hex(result_sha1)); |
| switch (ack) { |
| case ACK: |
| flushes = 0; |
| multi_ack = 0; |
| retval = 0; |
| goto done; |
| case ACK_common: |
| case ACK_ready: |
| case ACK_continue: { |
| struct commit *commit = |
| lookup_commit(result_sha1); |
| if (!commit) |
| die(_("invalid commit %s"), sha1_to_hex(result_sha1)); |
| if (args->stateless_rpc |
| && ack == ACK_common |
| && !(commit->object.flags & COMMON)) { |
| /* We need to replay the have for this object |
| * on the next RPC request so the peer knows |
| * it is in common with us. |
| */ |
| const char *hex = sha1_to_hex(result_sha1); |
| packet_buf_write(&req_buf, "have %s\n", hex); |
| state_len = req_buf.len; |
| /* |
| * Reset in_vain because an ack |
| * for this commit has not been |
| * seen. |
| */ |
| in_vain = 0; |
| } else if (!args->stateless_rpc |
| || ack != ACK_common) |
| in_vain = 0; |
| mark_common(commit, 0, 1); |
| retval = 0; |
| got_continue = 1; |
| if (ack == ACK_ready) { |
| clear_prio_queue(&rev_list); |
| got_ready = 1; |
| } |
| break; |
| } |
| } |
| } while (ack); |
| flushes--; |
| if (got_continue && MAX_IN_VAIN < in_vain) { |
| print_verbose(args, _("giving up")); |
| break; /* give up */ |
| } |
| } |
| } |
| done: |
| if (!got_ready || !no_done) { |
| packet_buf_write(&req_buf, "done\n"); |
| send_request(args, fd[1], &req_buf); |
| } |
| print_verbose(args, _("done")); |
| if (retval != 0) { |
| multi_ack = 0; |
| flushes++; |
| } |
| strbuf_release(&req_buf); |
| |
| if (!got_ready || !no_done) |
| consume_shallow_list(args, fd[0]); |
| while (flushes || multi_ack) { |
| int ack = get_ack(fd[0], result_sha1); |
| if (ack) { |
| print_verbose(args, _("got %s (%d) %s"), "ack", |
| ack, sha1_to_hex(result_sha1)); |
| if (ack == ACK) |
| return 0; |
| multi_ack = 1; |
| continue; |
| } |
| flushes--; |
| } |
| /* it is no error to fetch into a completely empty repo */ |
| return count ? retval : 0; |
| } |
| |
| static struct commit_list *complete; |
| |
| static int mark_complete(const unsigned char *sha1) |
| { |
| struct object *o = parse_object(sha1); |
| |
| while (o && o->type == OBJ_TAG) { |
| struct tag *t = (struct tag *) o; |
| if (!t->tagged) |
| break; /* broken repository */ |
| o->flags |= COMPLETE; |
| o = parse_object(t->tagged->oid.hash); |
| } |
| if (o && o->type == OBJ_COMMIT) { |
| struct commit *commit = (struct commit *)o; |
| if (!(commit->object.flags & COMPLETE)) { |
| commit->object.flags |= COMPLETE; |
| commit_list_insert(commit, &complete); |
| } |
| } |
| return 0; |
| } |
| |
| static int mark_complete_oid(const char *refname, const struct object_id *oid, |
| int flag, void *cb_data) |
| { |
| return mark_complete(oid->hash); |
| } |
| |
| static void mark_recent_complete_commits(struct fetch_pack_args *args, |
| unsigned long cutoff) |
| { |
| while (complete && cutoff <= complete->item->date) { |
| print_verbose(args, _("Marking %s as complete"), |
| oid_to_hex(&complete->item->object.oid)); |
| pop_most_recent_commit(&complete, COMPLETE); |
| } |
| } |
| |
| static void filter_refs(struct fetch_pack_args *args, |
| struct ref **refs, |
| struct ref **sought, int nr_sought) |
| { |
| struct ref *newlist = NULL; |
| struct ref **newtail = &newlist; |
| struct ref *ref, *next; |
| int i; |
| |
| i = 0; |
| for (ref = *refs; ref; ref = next) { |
| int keep = 0; |
| next = ref->next; |
| |
| if (starts_with(ref->name, "refs/") && |
| check_refname_format(ref->name, 0)) |
| ; /* trash */ |
| else { |
| while (i < nr_sought) { |
| int cmp = strcmp(ref->name, sought[i]->name); |
| if (cmp < 0) |
| break; /* definitely do not have it */ |
| else if (cmp == 0) { |
| keep = 1; /* definitely have it */ |
| sought[i]->matched = 1; |
| } |
| i++; |
| } |
| } |
| |
| if (!keep && args->fetch_all && |
| (!args->deepen || !starts_with(ref->name, "refs/tags/"))) |
| keep = 1; |
| |
| if (keep) { |
| *newtail = ref; |
| ref->next = NULL; |
| newtail = &ref->next; |
| } else { |
| free(ref); |
| } |
| } |
| |
| /* Append unmatched requests to the list */ |
| if ((allow_unadvertised_object_request & |
| (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1))) { |
| for (i = 0; i < nr_sought; i++) { |
| unsigned char sha1[20]; |
| |
| ref = sought[i]; |
| if (ref->matched) |
| continue; |
| if (get_sha1_hex(ref->name, sha1) || |
| ref->name[40] != '\0' || |
| hashcmp(sha1, ref->old_oid.hash)) |
| continue; |
| |
| ref->matched = 1; |
| *newtail = copy_ref(ref); |
| newtail = &(*newtail)->next; |
| } |
| } |
| *refs = newlist; |
| } |
| |
| static void mark_alternate_complete(const struct ref *ref, void *unused) |
| { |
| mark_complete(ref->old_oid.hash); |
| } |
| |
| static int everything_local(struct fetch_pack_args *args, |
| struct ref **refs, |
| struct ref **sought, int nr_sought) |
| { |
| struct ref *ref; |
| int retval; |
| unsigned long cutoff = 0; |
| |
| save_commit_buffer = 0; |
| |
| for (ref = *refs; ref; ref = ref->next) { |
| struct object *o; |
| |
| if (!has_object_file(&ref->old_oid)) |
| continue; |
| |
| o = parse_object(ref->old_oid.hash); |
| if (!o) |
| continue; |
| |
| /* We already have it -- which may mean that we were |
| * in sync with the other side at some time after |
| * that (it is OK if we guess wrong here). |
| */ |
| if (o->type == OBJ_COMMIT) { |
| struct commit *commit = (struct commit *)o; |
| if (!cutoff || cutoff < commit->date) |
| cutoff = commit->date; |
| } |
| } |
| |
| if (!args->deepen) { |
| for_each_ref(mark_complete_oid, NULL); |
| for_each_alternate_ref(mark_alternate_complete, NULL); |
| 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(lookup_object(ref->old_oid.hash), |
| NULL, 0); |
| |
| if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE)) |
| continue; |
| |
| if (!(o->flags & SEEN)) { |
| rev_list_push((struct commit *)o, COMMON_REF | SEEN); |
| |
| mark_common((struct commit *)o, 1, 1); |
| } |
| } |
| |
| filter_refs(args, refs, sought, nr_sought); |
| |
| for (retval = 1, ref = *refs; ref ; ref = ref->next) { |
| const unsigned char *remote = ref->old_oid.hash; |
| struct object *o; |
| |
| o = lookup_object(remote); |
| if (!o || !(o->flags & COMPLETE)) { |
| retval = 0; |
| print_verbose(args, "want %s (%s)", sha1_to_hex(remote), |
| ref->name); |
| continue; |
| } |
| print_verbose(args, _("already have %s (%s)"), sha1_to_hex(remote), |
| ref->name); |
| } |
| return retval; |
| } |
| |
| static int sideband_demux(int in, int out, void *data) |
| { |
| int *xd = data; |
| int ret; |
| |
| ret = recv_sideband("fetch-pack", xd[0], out); |
| close(out); |
| return ret; |
| } |
| |
| static int get_pack(struct fetch_pack_args *args, |
| int xd[2], char **pack_lockfile) |
| { |
| struct async demux; |
| int do_keep = args->keep_pack; |
| const char *cmd_name; |
| struct pack_header header; |
| int pass_header = 0; |
| struct child_process cmd = CHILD_PROCESS_INIT; |
| int ret; |
| |
| memset(&demux, 0, sizeof(demux)); |
| if (use_sideband) { |
| /* xd[] is talking with upload-pack; subprocess reads from |
| * xd[0], spits out band#2 to stderr, and feeds us band#1 |
| * through demux->out. |
| */ |
| demux.proc = sideband_demux; |
| demux.data = xd; |
| demux.out = -1; |
| demux.isolate_sigpipe = 1; |
| if (start_async(&demux)) |
| die(_("fetch-pack: unable to fork off sideband demultiplexer")); |
| } |
| else |
| demux.out = xd[0]; |
| |
| if (!args->keep_pack && unpack_limit) { |
| |
| if (read_pack_header(demux.out, &header)) |
| die(_("protocol error: bad pack header")); |
| pass_header = 1; |
| if (ntohl(header.hdr_entries) < unpack_limit) |
| do_keep = 0; |
| else |
| do_keep = 1; |
| } |
| |
| if (alternate_shallow_file) { |
| argv_array_push(&cmd.args, "--shallow-file"); |
| argv_array_push(&cmd.args, alternate_shallow_file); |
| } |
| |
| if (do_keep) { |
| if (pack_lockfile) |
| cmd.out = -1; |
| cmd_name = "index-pack"; |
| argv_array_push(&cmd.args, cmd_name); |
| argv_array_push(&cmd.args, "--stdin"); |
| if (!args->quiet && !args->no_progress) |
| argv_array_push(&cmd.args, "-v"); |
| if (args->use_thin_pack) |
| argv_array_push(&cmd.args, "--fix-thin"); |
| if (args->lock_pack || unpack_limit) { |
| char hostname[256]; |
| if (gethostname(hostname, sizeof(hostname))) |
| xsnprintf(hostname, sizeof(hostname), "localhost"); |
| argv_array_pushf(&cmd.args, |
| "--keep=fetch-pack %"PRIuMAX " on %s", |
| (uintmax_t)getpid(), hostname); |
| } |
| if (args->check_self_contained_and_connected) |
| argv_array_push(&cmd.args, "--check-self-contained-and-connected"); |
| } |
| else { |
| cmd_name = "unpack-objects"; |
| argv_array_push(&cmd.args, cmd_name); |
| if (args->quiet || args->no_progress) |
| argv_array_push(&cmd.args, "-q"); |
| args->check_self_contained_and_connected = 0; |
| } |
| |
| if (pass_header) |
| argv_array_pushf(&cmd.args, "--pack_header=%"PRIu32",%"PRIu32, |
| ntohl(header.hdr_version), |
| ntohl(header.hdr_entries)); |
| if (fetch_fsck_objects >= 0 |
| ? fetch_fsck_objects |
| : transfer_fsck_objects >= 0 |
| ? transfer_fsck_objects |
| : 0) |
| argv_array_push(&cmd.args, "--strict"); |
| |
| cmd.in = demux.out; |
| cmd.git_cmd = 1; |
| if (start_command(&cmd)) |
| die(_("fetch-pack: unable to fork off %s"), cmd_name); |
| if (do_keep && pack_lockfile) { |
| *pack_lockfile = index_pack_lockfile(cmd.out); |
| close(cmd.out); |
| } |
| |
| if (!use_sideband) |
| /* Closed by start_command() */ |
| xd[0] = -1; |
| |
| ret = finish_command(&cmd); |
| if (!ret || (args->check_self_contained_and_connected && ret == 1)) |
| args->self_contained_and_connected = |
| args->check_self_contained_and_connected && |
| ret == 0; |
| else |
| die(_("%s failed"), cmd_name); |
| if (use_sideband && finish_async(&demux)) |
| die(_("error in sideband demultiplexer")); |
| return 0; |
| } |
| |
| static int cmp_ref_by_name(const void *a_, const void *b_) |
| { |
| const struct ref *a = *((const struct ref **)a_); |
| const struct ref *b = *((const struct ref **)b_); |
| return strcmp(a->name, b->name); |
| } |
| |
| static struct ref *do_fetch_pack(struct fetch_pack_args *args, |
| int fd[2], |
| const struct ref *orig_ref, |
| struct ref **sought, int nr_sought, |
| struct shallow_info *si, |
| char **pack_lockfile) |
| { |
| struct ref *ref = copy_ref_list(orig_ref); |
| unsigned char sha1[20]; |
| const char *agent_feature; |
| int agent_len; |
| |
| sort_ref_list(&ref, ref_compare_name); |
| QSORT(sought, nr_sought, cmp_ref_by_name); |
| |
| if ((args->depth > 0 || is_repository_shallow()) && !server_supports("shallow")) |
| die(_("Server does not support shallow clients")); |
| if (args->depth > 0 || args->deepen_since || args->deepen_not) |
| args->deepen = 1; |
| if (server_supports("multi_ack_detailed")) { |
| print_verbose(args, _("Server supports multi_ack_detailed")); |
| multi_ack = 2; |
| if (server_supports("no-done")) { |
| print_verbose(args, _("Server supports no-done")); |
| if (args->stateless_rpc) |
| no_done = 1; |
| } |
| } |
| else if (server_supports("multi_ack")) { |
| print_verbose(args, _("Server supports multi_ack")); |
| multi_ack = 1; |
| } |
| if (server_supports("side-band-64k")) { |
| print_verbose(args, _("Server supports side-band-64k")); |
| use_sideband = 2; |
| } |
| else if (server_supports("side-band")) { |
| print_verbose(args, _("Server supports side-band")); |
| use_sideband = 1; |
| } |
| if (server_supports("allow-tip-sha1-in-want")) { |
| print_verbose(args, _("Server supports allow-tip-sha1-in-want")); |
| allow_unadvertised_object_request |= ALLOW_TIP_SHA1; |
| } |
| if (server_supports("allow-reachable-sha1-in-want")) { |
| print_verbose(args, _("Server supports allow-reachable-sha1-in-want")); |
| allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1; |
| } |
| if (!server_supports("thin-pack")) |
| args->use_thin_pack = 0; |
| if (!server_supports("no-progress")) |
| args->no_progress = 0; |
| if (!server_supports("include-tag")) |
| args->include_tag = 0; |
| if (server_supports("ofs-delta")) |
| print_verbose(args, _("Server supports ofs-delta")); |
| else |
| prefer_ofs_delta = 0; |
| |
| if ((agent_feature = server_feature_value("agent", &agent_len))) { |
| agent_supported = 1; |
| if (agent_len) |
| print_verbose(args, _("Server version is %.*s"), |
| agent_len, agent_feature); |
| } |
| if (server_supports("deepen-since")) |
| deepen_since_ok = 1; |
| else if (args->deepen_since) |
| die(_("Server does not support --shallow-since")); |
| if (server_supports("deepen-not")) |
| deepen_not_ok = 1; |
| else if (args->deepen_not) |
| die(_("Server does not support --shallow-exclude")); |
| if (!server_supports("deepen-relative") && args->deepen_relative) |
| die(_("Server does not support --deepen")); |
| |
| if (everything_local(args, &ref, sought, nr_sought)) { |
| packet_flush(fd[1]); |
| goto all_done; |
| } |
| if (find_common(args, fd, sha1, ref) < 0) |
| if (!args->keep_pack) |
| /* When cloning, it is not unusual to have |
| * no common commit. |
| */ |
| warning(_("no common commits")); |
| |
| if (args->stateless_rpc) |
| packet_flush(fd[1]); |
| if (args->deepen) |
| setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, |
| NULL); |
| else if (si->nr_ours || si->nr_theirs) |
| alternate_shallow_file = setup_temporary_shallow(si->shallow); |
| else |
| alternate_shallow_file = NULL; |
| if (get_pack(args, fd, pack_lockfile)) |
| die(_("git fetch-pack: fetch failed.")); |
| |
| all_done: |
| return ref; |
| } |
| |
| static void fetch_pack_config(void) |
| { |
| git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit); |
| git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit); |
| git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta); |
| git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects); |
| git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects); |
| |
| git_config(git_default_config, NULL); |
| } |
| |
| static void fetch_pack_setup(void) |
| { |
| static int did_setup; |
| if (did_setup) |
| return; |
| fetch_pack_config(); |
| if (0 <= transfer_unpack_limit) |
| unpack_limit = transfer_unpack_limit; |
| else if (0 <= fetch_unpack_limit) |
| unpack_limit = fetch_unpack_limit; |
| did_setup = 1; |
| } |
| |
| static int remove_duplicates_in_refs(struct ref **ref, int nr) |
| { |
| struct string_list names = STRING_LIST_INIT_NODUP; |
| int src, dst; |
| |
| for (src = dst = 0; src < nr; src++) { |
| struct string_list_item *item; |
| item = string_list_insert(&names, ref[src]->name); |
| if (item->util) |
| continue; /* already have it */ |
| item->util = ref[src]; |
| if (src != dst) |
| ref[dst] = ref[src]; |
| dst++; |
| } |
| for (src = dst; src < nr; src++) |
| ref[src] = NULL; |
| string_list_clear(&names, 0); |
| return dst; |
| } |
| |
| static void update_shallow(struct fetch_pack_args *args, |
| struct ref **sought, int nr_sought, |
| struct shallow_info *si) |
| { |
| struct sha1_array ref = SHA1_ARRAY_INIT; |
| int *status; |
| int i; |
| |
| if (args->deepen && alternate_shallow_file) { |
| if (*alternate_shallow_file == '\0') { /* --unshallow */ |
| unlink_or_warn(git_path_shallow()); |
| rollback_lock_file(&shallow_lock); |
| } else |
| commit_lock_file(&shallow_lock); |
| return; |
| } |
| |
| if (!si->shallow || !si->shallow->nr) |
| return; |
| |
| if (args->cloning) { |
| /* |
| * remote is shallow, but this is a clone, there are |
| * no objects in repo to worry about. Accept any |
| * shallow points that exist in the pack (iow in repo |
| * after get_pack() and reprepare_packed_git()) |
| */ |
| struct sha1_array extra = SHA1_ARRAY_INIT; |
| unsigned char (*sha1)[20] = si->shallow->sha1; |
| for (i = 0; i < si->shallow->nr; i++) |
| if (has_sha1_file(sha1[i])) |
| sha1_array_append(&extra, sha1[i]); |
| if (extra.nr) { |
| setup_alternate_shallow(&shallow_lock, |
| &alternate_shallow_file, |
| &extra); |
| commit_lock_file(&shallow_lock); |
| } |
| sha1_array_clear(&extra); |
| return; |
| } |
| |
| if (!si->nr_ours && !si->nr_theirs) |
| return; |
| |
| remove_nonexistent_theirs_shallow(si); |
| if (!si->nr_ours && !si->nr_theirs) |
| return; |
| for (i = 0; i < nr_sought; i++) |
| sha1_array_append(&ref, sought[i]->old_oid.hash); |
| si->ref = &ref; |
| |
| if (args->update_shallow) { |
| /* |
| * remote is also shallow, .git/shallow may be updated |
| * so all refs can be accepted. Make sure we only add |
| * shallow roots that are actually reachable from new |
| * refs. |
| */ |
| struct sha1_array extra = SHA1_ARRAY_INIT; |
| unsigned char (*sha1)[20] = si->shallow->sha1; |
| assign_shallow_commits_to_refs(si, NULL, NULL); |
| if (!si->nr_ours && !si->nr_theirs) { |
| sha1_array_clear(&ref); |
| return; |
| } |
| for (i = 0; i < si->nr_ours; i++) |
| sha1_array_append(&extra, sha1[si->ours[i]]); |
| for (i = 0; i < si->nr_theirs; i++) |
| sha1_array_append(&extra, sha1[si->theirs[i]]); |
| setup_alternate_shallow(&shallow_lock, |
| &alternate_shallow_file, |
| &extra); |
| commit_lock_file(&shallow_lock); |
| sha1_array_clear(&extra); |
| sha1_array_clear(&ref); |
| return; |
| } |
| |
| /* |
| * remote is also shallow, check what ref is safe to update |
| * without updating .git/shallow |
| */ |
| status = xcalloc(nr_sought, sizeof(*status)); |
| assign_shallow_commits_to_refs(si, NULL, status); |
| if (si->nr_ours || si->nr_theirs) { |
| for (i = 0; i < nr_sought; i++) |
| if (status[i]) |
| sought[i]->status = REF_STATUS_REJECT_SHALLOW; |
| } |
| free(status); |
| sha1_array_clear(&ref); |
| } |
| |
| struct ref *fetch_pack(struct fetch_pack_args *args, |
| int fd[], struct child_process *conn, |
| const struct ref *ref, |
| const char *dest, |
| struct ref **sought, int nr_sought, |
| struct sha1_array *shallow, |
| char **pack_lockfile) |
| { |
| struct ref *ref_cpy; |
| struct shallow_info si; |
| |
| fetch_pack_setup(); |
| if (nr_sought) |
| nr_sought = remove_duplicates_in_refs(sought, nr_sought); |
| |
| if (!ref) { |
| packet_flush(fd[1]); |
| die(_("no matching remote head")); |
| } |
| prepare_shallow_info(&si, shallow); |
| 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); |
| return ref_cpy; |
| } |