--- /dev/null
- error("remote '%s' is not a strict "
- "subset of local ref '%s'. "
- "maybe you are not up-to-date and "
+ #include "cache.h"
+ #include "commit.h"
+ #include "tag.h"
+ #include "refs.h"
+ #include "pkt-line.h"
+ #include "run-command.h"
+ #include "remote.h"
+ #include "send-pack.h"
+
+ static const char send_pack_usage[] =
+ "git-send-pack [--all] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
+ " --all and explicit <ref> specification are mutually exclusive.";
+
+ static struct send_pack_args args = {
+ /* .receivepack = */ "git-receive-pack",
+ };
+
+ /*
+ * Make a pack stream and spit it out into file descriptor fd
+ */
+ static int pack_objects(int fd, struct ref *refs)
+ {
+ /*
+ * The child becomes pack-objects --revs; we feed
+ * the revision parameters to it via its stdin and
+ * let its stdout go back to the other end.
+ */
+ const char *argv[] = {
+ "pack-objects",
+ "--all-progress",
+ "--revs",
+ "--stdout",
+ NULL,
+ NULL,
+ };
+ struct child_process po;
+
+ if (args.use_thin_pack)
+ argv[4] = "--thin";
+ memset(&po, 0, sizeof(po));
+ po.argv = argv;
+ po.in = -1;
+ po.out = fd;
+ po.git_cmd = 1;
+ if (start_command(&po))
+ die("git-pack-objects failed (%s)", strerror(errno));
+
+ /*
+ * We feed the pack-objects we just spawned with revision
+ * parameters by writing to the pipe.
+ */
+ while (refs) {
+ char buf[42];
+
+ if (!is_null_sha1(refs->old_sha1) &&
+ has_sha1_file(refs->old_sha1)) {
+ memcpy(buf + 1, sha1_to_hex(refs->old_sha1), 40);
+ buf[0] = '^';
+ buf[41] = '\n';
+ if (!write_or_whine(po.in, buf, 42,
+ "send-pack: send refs"))
+ break;
+ }
+ if (!is_null_sha1(refs->new_sha1)) {
+ memcpy(buf, sha1_to_hex(refs->new_sha1), 40);
+ buf[40] = '\n';
+ if (!write_or_whine(po.in, buf, 41,
+ "send-pack: send refs"))
+ break;
+ }
+ refs = refs->next;
+ }
+
+ if (finish_command(&po))
+ return error("pack-objects died with strange error");
+ return 0;
+ }
+
+ static void unmark_and_free(struct commit_list *list, unsigned int mark)
+ {
+ while (list) {
+ struct commit_list *temp = list;
+ temp->item->object.flags &= ~mark;
+ list = temp->next;
+ free(temp);
+ }
+ }
+
+ static int ref_newer(const unsigned char *new_sha1,
+ const unsigned char *old_sha1)
+ {
+ struct object *o;
+ struct commit *old, *new;
+ struct commit_list *list, *used;
+ int found = 0;
+
+ /* Both new and old must be commit-ish and new is descendant of
+ * old. Otherwise we require --force.
+ */
+ o = deref_tag(parse_object(old_sha1), NULL, 0);
+ if (!o || o->type != OBJ_COMMIT)
+ return 0;
+ old = (struct commit *) o;
+
+ o = deref_tag(parse_object(new_sha1), NULL, 0);
+ if (!o || o->type != OBJ_COMMIT)
+ return 0;
+ new = (struct commit *) o;
+
+ if (parse_commit(new) < 0)
+ return 0;
+
+ used = list = NULL;
+ commit_list_insert(new, &list);
+ while (list) {
+ new = pop_most_recent_commit(&list, 1);
+ commit_list_insert(new, &used);
+ if (new == old) {
+ found = 1;
+ break;
+ }
+ }
+ unmark_and_free(list, 1);
+ unmark_and_free(used, 1);
+ return found;
+ }
+
+ static struct ref *local_refs, **local_tail;
+ static struct ref *remote_refs, **remote_tail;
+
+ static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
+ {
+ struct ref *ref;
+ int len = strlen(refname) + 1;
+ ref = xcalloc(1, sizeof(*ref) + len);
+ hashcpy(ref->new_sha1, sha1);
+ memcpy(ref->name, refname, len);
+ *local_tail = ref;
+ local_tail = &ref->next;
+ return 0;
+ }
+
+ static void get_local_heads(void)
+ {
+ local_tail = &local_refs;
+ for_each_ref(one_local_ref, NULL);
+ }
+
+ static int receive_status(int in)
+ {
+ char line[1000];
+ int ret = 0;
+ int len = packet_read_line(in, line, sizeof(line));
+ if (len < 10 || memcmp(line, "unpack ", 7)) {
+ fprintf(stderr, "did not receive status back\n");
+ return -1;
+ }
+ if (memcmp(line, "unpack ok\n", 10)) {
+ fputs(line, stderr);
+ ret = -1;
+ }
+ while (1) {
+ len = packet_read_line(in, line, sizeof(line));
+ if (!len)
+ break;
+ if (len < 3 ||
+ (memcmp(line, "ok", 2) && memcmp(line, "ng", 2))) {
+ fprintf(stderr, "protocol error: %s\n", line);
+ ret = -1;
+ break;
+ }
+ if (!memcmp(line, "ok", 2))
+ continue;
+ fputs(line, stderr);
+ ret = -1;
+ }
+ return ret;
+ }
+
+ static void update_tracking_ref(struct remote *remote, struct ref *ref)
+ {
+ struct refspec rs;
+ int will_delete_ref;
+
+ rs.src = ref->name;
+ rs.dst = NULL;
+
+ if (!ref->peer_ref)
+ return;
+
+ will_delete_ref = is_null_sha1(ref->peer_ref->new_sha1);
+
+ if (!will_delete_ref &&
+ !hashcmp(ref->old_sha1, ref->peer_ref->new_sha1))
+ return;
+
+ if (!remote_find_tracking(remote, &rs)) {
+ fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
+ if (is_null_sha1(ref->peer_ref->new_sha1)) {
+ if (delete_ref(rs.dst, NULL))
+ error("Failed to delete");
+ } else
+ update_ref("update by push", rs.dst,
+ ref->new_sha1, NULL, 0, 0);
+ free(rs.dst);
+ }
+ }
+
+ static int do_send_pack(int in, int out, struct remote *remote, int nr_refspec, const char **refspec)
+ {
+ struct ref *ref;
+ int new_refs;
+ int ret = 0;
+ int ask_for_status_report = 0;
+ int allow_deleting_refs = 0;
+ int expect_status_report = 0;
+
+ /* No funny business with the matcher */
+ remote_tail = get_remote_heads(in, &remote_refs, 0, NULL, REF_NORMAL);
+ get_local_heads();
+
+ /* Does the other end support the reporting? */
+ if (server_supports("report-status"))
+ ask_for_status_report = 1;
+ if (server_supports("delete-refs"))
+ allow_deleting_refs = 1;
+
+ /* match them up */
+ if (!remote_tail)
+ remote_tail = &remote_refs;
+ if (match_refs(local_refs, remote_refs, &remote_tail,
+ nr_refspec, refspec, args.send_all))
+ return -1;
+
+ if (!remote_refs) {
+ fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
+ "Perhaps you should specify a branch such as 'master'.\n");
+ return 0;
+ }
+
+ /*
+ * Finally, tell the other end!
+ */
+ new_refs = 0;
+ for (ref = remote_refs; ref; ref = ref->next) {
+ char old_hex[60], *new_hex;
+ int will_delete_ref;
+
+ if (!ref->peer_ref)
+ continue;
+
+
+ will_delete_ref = is_null_sha1(ref->peer_ref->new_sha1);
+ if (will_delete_ref && !allow_deleting_refs) {
+ error("remote does not support deleting refs");
+ ret = -2;
+ continue;
+ }
+ if (!will_delete_ref &&
+ !hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
+ if (args.verbose)
+ fprintf(stderr, "'%s': up-to-date\n", ref->name);
+ continue;
+ }
+
+ /* This part determines what can overwrite what.
+ * The rules are:
+ *
+ * (0) you can always use --force or +A:B notation to
+ * selectively force individual ref pairs.
+ *
+ * (1) if the old thing does not exist, it is OK.
+ *
+ * (2) if you do not have the old thing, you are not allowed
+ * to overwrite it; you would not know what you are losing
+ * otherwise.
+ *
+ * (3) if both new and old are commit-ish, and new is a
+ * descendant of old, it is OK.
+ *
+ * (4) regardless of all of the above, removing :B is
+ * always allowed.
+ */
+
+ if (!args.force_update &&
+ !will_delete_ref &&
+ !is_null_sha1(ref->old_sha1) &&
+ !ref->force) {
+ if (!has_sha1_file(ref->old_sha1) ||
+ !ref_newer(ref->peer_ref->new_sha1,
+ ref->old_sha1)) {
+ /* We do not have the remote ref, or
+ * we know that the remote ref is not
+ * an ancestor of what we are trying to
+ * push. Either way this can be losing
+ * commits at the remote end and likely
+ * we were not up to date to begin with.
+ */
++ error("remote '%s' is not an ancestor of\n"
++ " local '%s'.\n"
++ " Maybe you are not up-to-date and "
+ "need to pull first?",
+ ref->name,
+ ref->peer_ref->name);
+ ret = -2;
+ continue;
+ }
+ }
+ hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
+ if (!will_delete_ref)
+ new_refs++;
+ strcpy(old_hex, sha1_to_hex(ref->old_sha1));
+ new_hex = sha1_to_hex(ref->new_sha1);
+
+ if (!args.dry_run) {
+ if (ask_for_status_report) {
+ packet_write(out, "%s %s %s%c%s",
+ old_hex, new_hex, ref->name, 0,
+ "report-status");
+ ask_for_status_report = 0;
+ expect_status_report = 1;
+ }
+ else
+ packet_write(out, "%s %s %s",
+ old_hex, new_hex, ref->name);
+ }
+ if (will_delete_ref)
+ fprintf(stderr, "deleting '%s'\n", ref->name);
+ else {
+ fprintf(stderr, "updating '%s'", ref->name);
+ if (strcmp(ref->name, ref->peer_ref->name))
+ fprintf(stderr, " using '%s'",
+ ref->peer_ref->name);
+ fprintf(stderr, "\n from %s\n to %s\n",
+ old_hex, new_hex);
+ }
+ }
+
+ packet_flush(out);
+ if (new_refs && !args.dry_run)
+ ret = pack_objects(out, remote_refs);
+ close(out);
+
+ if (expect_status_report) {
+ if (receive_status(in))
+ ret = -4;
+ }
+
+ if (!args.dry_run && remote && ret == 0) {
+ for (ref = remote_refs; ref; ref = ref->next)
+ update_tracking_ref(remote, ref);
+ }
+
+ if (!new_refs && ret == 0)
+ fprintf(stderr, "Everything up-to-date\n");
+ return ret;
+ }
+
+ static void verify_remote_names(int nr_heads, const char **heads)
+ {
+ int i;
+
+ for (i = 0; i < nr_heads; i++) {
+ const char *remote = strchr(heads[i], ':');
+
+ remote = remote ? (remote + 1) : heads[i];
+ switch (check_ref_format(remote)) {
+ case 0: /* ok */
+ case -2: /* ok but a single level -- that is fine for
+ * a match pattern.
+ */
+ case -3: /* ok but ends with a pattern-match character */
+ continue;
+ }
+ die("remote part of refspec is not a valid name in %s",
+ heads[i]);
+ }
+ }
+
+ int cmd_send_pack(int argc, const char **argv, const char *prefix)
+ {
+ int i, nr_heads = 0;
+ const char **heads = NULL;
+ const char *remote_name = NULL;
+ struct remote *remote = NULL;
+ const char *dest = NULL;
+
+ argv++;
+ for (i = 1; i < argc; i++, argv++) {
+ const char *arg = *argv;
+
+ if (*arg == '-') {
+ if (!prefixcmp(arg, "--receive-pack=")) {
+ args.receivepack = arg + 15;
+ continue;
+ }
+ if (!prefixcmp(arg, "--exec=")) {
+ args.receivepack = arg + 7;
+ continue;
+ }
+ if (!prefixcmp(arg, "--remote=")) {
+ remote_name = arg + 9;
+ continue;
+ }
+ if (!strcmp(arg, "--all")) {
+ args.send_all = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--dry-run")) {
+ args.dry_run = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--force")) {
+ args.force_update = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--verbose")) {
+ args.verbose = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--thin")) {
+ args.use_thin_pack = 1;
+ continue;
+ }
+ usage(send_pack_usage);
+ }
+ if (!dest) {
+ dest = arg;
+ continue;
+ }
+ heads = (const char **) argv;
+ nr_heads = argc - i;
+ break;
+ }
+ if (!dest)
+ usage(send_pack_usage);
+ if (heads && args.send_all)
+ usage(send_pack_usage);
+
+ if (remote_name) {
+ remote = remote_get(remote_name);
+ if (!remote_has_url(remote, dest)) {
+ die("Destination %s is not a uri for %s",
+ dest, remote_name);
+ }
+ }
+
+ return send_pack(&args, dest, remote, nr_heads, heads);
+ }
+
+ int send_pack(struct send_pack_args *my_args,
+ const char *dest, struct remote *remote,
+ int nr_heads, const char **heads)
+ {
+ int fd[2], ret;
+ struct child_process *conn;
+
+ memcpy(&args, my_args, sizeof(args));
+
+ verify_remote_names(nr_heads, heads);
+
+ conn = git_connect(fd, dest, args.receivepack, args.verbose ? CONNECT_VERBOSE : 0);
+ ret = do_send_pack(fd[0], fd[1], remote, nr_heads, heads);
+ close(fd[0]);
+ close(fd[1]);
+ ret |= finish_connect(conn);
+ return !!ret;
+ }