diff options
Diffstat (limited to 'transport.c')
| -rw-r--r-- | transport.c | 1250 |
1 files changed, 1250 insertions, 0 deletions
diff --git a/transport.c b/transport.c new file mode 100644 index 0000000000..ea9dcb6612 --- /dev/null +++ b/transport.c @@ -0,0 +1,1250 @@ +#include "cache.h" +#include "transport.h" +#include "run-command.h" +#include "pkt-line.h" +#include "fetch-pack.h" +#include "send-pack.h" +#include "walker.h" +#include "bundle.h" +#include "dir.h" +#include "refs.h" +#include "branch.h" +#include "url.h" +#include "submodule.h" + +/* rsync support */ + +/* + * We copy packed-refs and refs/ into a temporary file, then read the + * loose refs recursively (sorting whenever possible), and then inserting + * those packed refs that are not yet in the list (not validating, but + * assuming that the file is sorted). + * + * Appears refactoring this from refs.c is too cumbersome. + */ + +static int str_cmp(const void *a, const void *b) +{ + const char *s1 = a; + const char *s2 = b; + + return strcmp(s1, s2); +} + +/* path->buf + name_offset is expected to point to "refs/" */ + +static int read_loose_refs(struct strbuf *path, int name_offset, + struct ref **tail) +{ + DIR *dir = opendir(path->buf); + struct dirent *de; + struct { + char **entries; + int nr, alloc; + } list; + int i, pathlen; + + if (!dir) + return -1; + + memset (&list, 0, sizeof(list)); + + while ((de = readdir(dir))) { + if (is_dot_or_dotdot(de->d_name)) + continue; + ALLOC_GROW(list.entries, list.nr + 1, list.alloc); + list.entries[list.nr++] = xstrdup(de->d_name); + } + closedir(dir); + + /* sort the list */ + + qsort(list.entries, list.nr, sizeof(char *), str_cmp); + + pathlen = path->len; + strbuf_addch(path, '/'); + + for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) { + strbuf_addstr(path, list.entries[i]); + if (read_loose_refs(path, name_offset, tail)) { + int fd = open(path->buf, O_RDONLY); + char buffer[40]; + struct ref *next; + + if (fd < 0) + continue; + next = alloc_ref(path->buf + name_offset); + if (read_in_full(fd, buffer, 40) != 40 || + get_sha1_hex(buffer, next->old_sha1)) { + close(fd); + free(next); + continue; + } + close(fd); + (*tail)->next = next; + *tail = next; + } + } + strbuf_setlen(path, pathlen); + + for (i = 0; i < list.nr; i++) + free(list.entries[i]); + free(list.entries); + + return 0; +} + +/* insert the packed refs for which no loose refs were found */ + +static void insert_packed_refs(const char *packed_refs, struct ref **list) +{ + FILE *f = fopen(packed_refs, "r"); + static char buffer[PATH_MAX]; + + if (!f) + return; + + for (;;) { + int cmp = cmp, len; + + if (!fgets(buffer, sizeof(buffer), f)) { + fclose(f); + return; + } + + if (hexval(buffer[0]) > 0xf) + continue; + len = strlen(buffer); + if (len && buffer[len - 1] == '\n') + buffer[--len] = '\0'; + if (len < 41) + continue; + while ((*list)->next && + (cmp = strcmp(buffer + 41, + (*list)->next->name)) > 0) + list = &(*list)->next; + if (!(*list)->next || cmp < 0) { + struct ref *next = alloc_ref(buffer + 41); + buffer[40] = '\0'; + if (get_sha1_hex(buffer, next->old_sha1)) { + warning ("invalid SHA-1: %s", buffer); + free(next); + continue; + } + next->next = (*list)->next; + (*list)->next = next; + list = &(*list)->next; + } + } +} + +static void set_upstreams(struct transport *transport, struct ref *refs, + int pretend) +{ + struct ref *ref; + for (ref = refs; ref; ref = ref->next) { + const char *localname; + const char *tmp; + const char *remotename; + unsigned char sha[20]; + int flag = 0; + /* + * Check suitability for tracking. Must be successful / + * already up-to-date ref create/modify (not delete). + */ + if (ref->status != REF_STATUS_OK && + ref->status != REF_STATUS_UPTODATE) + continue; + if (!ref->peer_ref) + continue; + if (is_null_sha1(ref->new_sha1)) + continue; + + /* Follow symbolic refs (mainly for HEAD). */ + localname = ref->peer_ref->name; + remotename = ref->name; + tmp = resolve_ref_unsafe(localname, sha, 1, &flag); + if (tmp && flag & REF_ISSYMREF && + !prefixcmp(tmp, "refs/heads/")) + localname = tmp; + + /* Both source and destination must be local branches. */ + if (!localname || prefixcmp(localname, "refs/heads/")) + continue; + if (!remotename || prefixcmp(remotename, "refs/heads/")) + continue; + + if (!pretend) + install_branch_config(BRANCH_CONFIG_VERBOSE, + localname + 11, transport->remote->name, + remotename); + else + printf("Would set upstream of '%s' to '%s' of '%s'\n", + localname + 11, remotename + 11, + transport->remote->name); + } +} + +static const char *rsync_url(const char *url) +{ + return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url; +} + +static struct ref *get_refs_via_rsync(struct transport *transport, int for_push) +{ + struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT; + struct ref dummy = {NULL}, *tail = &dummy; + struct child_process rsync; + const char *args[5]; + int temp_dir_len; + + if (for_push) + return NULL; + + /* copy the refs to the temporary directory */ + + strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX")); + if (!mkdtemp(temp_dir.buf)) + die_errno ("Could not make temporary directory"); + temp_dir_len = temp_dir.len; + + strbuf_addstr(&buf, rsync_url(transport->url)); + strbuf_addstr(&buf, "/refs"); + + memset(&rsync, 0, sizeof(rsync)); + rsync.argv = args; + rsync.stdout_to_stderr = 1; + args[0] = "rsync"; + args[1] = (transport->verbose > 1) ? "-rv" : "-r"; + args[2] = buf.buf; + args[3] = temp_dir.buf; + args[4] = NULL; + + if (run_command(&rsync)) + die ("Could not run rsync to get refs"); + + strbuf_reset(&buf); + strbuf_addstr(&buf, rsync_url(transport->url)); + strbuf_addstr(&buf, "/packed-refs"); + + args[2] = buf.buf; + + if (run_command(&rsync)) + die ("Could not run rsync to get refs"); + + /* read the copied refs */ + + strbuf_addstr(&temp_dir, "/refs"); + read_loose_refs(&temp_dir, temp_dir_len + 1, &tail); + strbuf_setlen(&temp_dir, temp_dir_len); + + tail = &dummy; + strbuf_addstr(&temp_dir, "/packed-refs"); + insert_packed_refs(temp_dir.buf, &tail); + strbuf_setlen(&temp_dir, temp_dir_len); + + if (remove_dir_recursively(&temp_dir, 0)) + warning ("Error removing temporary directory %s.", + temp_dir.buf); + + strbuf_release(&buf); + strbuf_release(&temp_dir); + + return dummy.next; +} + +static int fetch_objs_via_rsync(struct transport *transport, + int nr_objs, struct ref **to_fetch) +{ + struct strbuf buf = STRBUF_INIT; + struct child_process rsync; + const char *args[8]; + int result; + + strbuf_addstr(&buf, rsync_url(transport->url)); + strbuf_addstr(&buf, "/objects/"); + + memset(&rsync, 0, sizeof(rsync)); + rsync.argv = args; + rsync.stdout_to_stderr = 1; + args[0] = "rsync"; + args[1] = (transport->verbose > 1) ? "-rv" : "-r"; + args[2] = "--ignore-existing"; + args[3] = "--exclude"; + args[4] = "info"; + args[5] = buf.buf; + args[6] = get_object_directory(); + args[7] = NULL; + + /* NEEDSWORK: handle one level of alternates */ + result = run_command(&rsync); + + strbuf_release(&buf); + + return result; +} + +static int write_one_ref(const char *name, const unsigned char *sha1, + int flags, void *data) +{ + struct strbuf *buf = data; + int len = buf->len; + FILE *f; + + /* when called via for_each_ref(), flags is non-zero */ + if (flags && prefixcmp(name, "refs/heads/") && + prefixcmp(name, "refs/tags/")) + return 0; + + strbuf_addstr(buf, name); + if (safe_create_leading_directories(buf->buf) || + !(f = fopen(buf->buf, "w")) || + fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 || + fclose(f)) + return error("problems writing temporary file %s", buf->buf); + strbuf_setlen(buf, len); + return 0; +} + +static int write_refs_to_temp_dir(struct strbuf *temp_dir, + int refspec_nr, const char **refspec) +{ + int i; + + for (i = 0; i < refspec_nr; i++) { + unsigned char sha1[20]; + char *ref; + + if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1) + return error("Could not get ref %s", refspec[i]); + + if (write_one_ref(ref, sha1, 0, temp_dir)) { + free(ref); + return -1; + } + free(ref); + } + return 0; +} + +static int rsync_transport_push(struct transport *transport, + int refspec_nr, const char **refspec, int flags) +{ + struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT; + int result = 0, i; + struct child_process rsync; + const char *args[10]; + + if (flags & TRANSPORT_PUSH_MIRROR) + return error("rsync transport does not support mirror mode"); + + /* first push the objects */ + + strbuf_addstr(&buf, rsync_url(transport->url)); + strbuf_addch(&buf, '/'); + + memset(&rsync, 0, sizeof(rsync)); + rsync.argv = args; + rsync.stdout_to_stderr = 1; + i = 0; + args[i++] = "rsync"; + args[i++] = "-a"; + if (flags & TRANSPORT_PUSH_DRY_RUN) + args[i++] = "--dry-run"; + if (transport->verbose > 1) + args[i++] = "-v"; + args[i++] = "--ignore-existing"; + args[i++] = "--exclude"; + args[i++] = "info"; + args[i++] = get_object_directory(); + args[i++] = buf.buf; + args[i++] = NULL; + + if (run_command(&rsync)) + return error("Could not push objects to %s", + rsync_url(transport->url)); + + /* copy the refs to the temporary directory; they could be packed. */ + + strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX")); + if (!mkdtemp(temp_dir.buf)) + die_errno ("Could not make temporary directory"); + strbuf_addch(&temp_dir, '/'); + + if (flags & TRANSPORT_PUSH_ALL) { + if (for_each_ref(write_one_ref, &temp_dir)) + return -1; + } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec)) + return -1; + + i = 2; + if (flags & TRANSPORT_PUSH_DRY_RUN) + args[i++] = "--dry-run"; + if (!(flags & TRANSPORT_PUSH_FORCE)) + args[i++] = "--ignore-existing"; + args[i++] = temp_dir.buf; + args[i++] = rsync_url(transport->url); + args[i++] = NULL; + if (run_command(&rsync)) + result = error("Could not push to %s", + rsync_url(transport->url)); + + if (remove_dir_recursively(&temp_dir, 0)) + warning ("Could not remove temporary directory %s.", + temp_dir.buf); + + strbuf_release(&buf); + strbuf_release(&temp_dir); + + return result; +} + +struct bundle_transport_data { + int fd; + struct bundle_header header; +}; + +static struct ref *get_refs_from_bundle(struct transport *transport, int for_push) +{ + struct bundle_transport_data *data = transport->data; + struct ref *result = NULL; + int i; + + if (for_push) + return NULL; + + if (data->fd > 0) + close(data->fd); + data->fd = read_bundle_header(transport->url, &data->header); + if (data->fd < 0) + die ("Could not read bundle '%s'.", transport->url); + for (i = 0; i < data->header.references.nr; i++) { + struct ref_list_entry *e = data->header.references.list + i; + struct ref *ref = alloc_ref(e->name); + hashcpy(ref->old_sha1, e->sha1); + ref->next = result; + result = ref; + } + return result; +} + +static int fetch_refs_from_bundle(struct transport *transport, + int nr_heads, struct ref **to_fetch) +{ + struct bundle_transport_data *data = transport->data; + return unbundle(&data->header, data->fd, + transport->progress ? BUNDLE_VERBOSE : 0); +} + +static int close_bundle(struct transport *transport) +{ + struct bundle_transport_data *data = transport->data; + if (data->fd > 0) + close(data->fd); + free(data); + return 0; +} + +struct git_transport_data { + struct git_transport_options options; + struct child_process *conn; + int fd[2]; + unsigned got_remote_heads : 1; + struct extra_have_objects extra_have; +}; + +static int set_git_option(struct git_transport_options *opts, + const char *name, const char *value) +{ + if (!strcmp(name, TRANS_OPT_UPLOADPACK)) { + opts->uploadpack = value; + return 0; + } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) { + opts->receivepack = value; + return 0; + } else if (!strcmp(name, TRANS_OPT_THIN)) { + opts->thin = !!value; + return 0; + } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) { + opts->followtags = !!value; + return 0; + } else if (!strcmp(name, TRANS_OPT_KEEP)) { + opts->keep = !!value; + return 0; + } else if (!strcmp(name, TRANS_OPT_DEPTH)) { + if (!value) + opts->depth = 0; + else { + char *end; + opts->depth = strtol(value, &end, 0); + if (*end) + die("transport: invalid depth option '%s'", value); + } + return 0; + } + return 1; +} + +static int connect_setup(struct transport *transport, int for_push, int verbose) +{ + struct git_transport_data *data = transport->data; + + if (data->conn) + return 0; + + data->conn = git_connect(data->fd, transport->url, + for_push ? data->options.receivepack : + data->options.uploadpack, + verbose ? CONNECT_VERBOSE : 0); + + return 0; +} + +static struct ref *get_refs_via_connect(struct transport *transport, int for_push) +{ + struct git_transport_data *data = transport->data; + struct ref *refs; + + connect_setup(transport, for_push, 0); + get_remote_heads(data->fd[0], &refs, + for_push ? REF_NORMAL : 0, &data->extra_have); + data->got_remote_heads = 1; + + return refs; +} + +static int fetch_refs_via_pack(struct transport *transport, + int nr_heads, struct ref **to_fetch) +{ + struct git_transport_data *data = transport->data; + char **heads = xmalloc(nr_heads * sizeof(*heads)); + char **origh = xmalloc(nr_heads * sizeof(*origh)); + const struct ref *refs; + char *dest = xstrdup(transport->url); + struct fetch_pack_args args; + int i; + struct ref *refs_tmp = NULL; + + memset(&args, 0, sizeof(args)); + args.uploadpack = data->options.uploadpack; + args.keep_pack = data->options.keep; + args.lock_pack = 1; + args.use_thin_pack = data->options.thin; + args.include_tag = data->options.followtags; + args.verbose = (transport->verbose > 1); + args.quiet = (transport->verbose < 0); + args.no_progress = !transport->progress; + args.depth = data->options.depth; + + for (i = 0; i < nr_heads; i++) + origh[i] = heads[i] = xstrdup(to_fetch[i]->name); + + if (!data->got_remote_heads) { + connect_setup(transport, 0, 0); + get_remote_heads(data->fd[0], &refs_tmp, 0, NULL); + data->got_remote_heads = 1; + } + + refs = fetch_pack(&args, data->fd, data->conn, + refs_tmp ? refs_tmp : transport->remote_refs, + dest, nr_heads, heads, &transport->pack_lockfile); + close(data->fd[0]); + close(data->fd[1]); + if (finish_connect(data->conn)) + refs = NULL; + data->conn = NULL; + data->got_remote_heads = 0; + + free_refs(refs_tmp); + + for (i = 0; i < nr_heads; i++) + free(origh[i]); + free(origh); + free(heads); + free(dest); + return (refs ? 0 : -1); +} + +static int push_had_errors(struct ref *ref) +{ + for (; ref; ref = ref->next) { + switch (ref->status) { + case REF_STATUS_NONE: + case REF_STATUS_UPTODATE: + case REF_STATUS_OK: + break; + default: + return 1; + } + } + return 0; +} + +int transport_refs_pushed(struct ref *ref) +{ + for (; ref; ref = ref->next) { + switch(ref->status) { + case REF_STATUS_NONE: + case REF_STATUS_UPTODATE: + break; + default: + return 1; + } + } + return 0; +} + +void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose) +{ + struct refspec rs; + + if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE) + return; + + rs.src = ref->name; + rs.dst = NULL; + + if (!remote_find_tracking(remote, &rs)) { + if (verbose) + fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst); + if (ref->deletion) { + delete_ref(rs.dst, NULL, 0); + } else + update_ref("update by push", rs.dst, + ref->new_sha1, NULL, 0, 0); + free(rs.dst); + } +} + +static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain) +{ + if (porcelain) { + if (from) + fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name); + else + fprintf(stdout, "%c\t:%s\t", flag, to->name); + if (msg) + fprintf(stdout, "%s (%s)\n", summary, msg); + else + fprintf(stdout, "%s\n", summary); + } else { + fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary); + if (from) + fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name)); + else + fputs(prettify_refname(to->name), stderr); + if (msg) { + fputs(" (", stderr); + fputs(msg, stderr); + fputc(')', stderr); + } + fputc('\n', stderr); + } +} + +static const char *status_abbrev(unsigned char sha1[20]) +{ + return find_unique_abbrev(sha1, DEFAULT_ABBREV); +} + +static void print_ok_ref_status(struct ref *ref, int porcelain) +{ + if (ref->deletion) + print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain); + else if (is_null_sha1(ref->old_sha1)) + print_ref_status('*', + (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" : + "[new branch]"), + ref, ref->peer_ref, NULL, porcelain); + else { + char quickref[84]; + char type; + const char *msg; + + strcpy(quickref, status_abbrev(ref->old_sha1)); + if (ref->nonfastforward) { + strcat(quickref, "..."); + type = '+'; + msg = "forced update"; + } else { + strcat(quickref, ".."); + type = ' '; + msg = NULL; + } + strcat(quickref, status_abbrev(ref->new_sha1)); + + print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain); + } +} + +static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain) +{ + if (!count) + fprintf(porcelain ? stdout : stderr, "To %s\n", dest); + + switch(ref->status) { + case REF_STATUS_NONE: + print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain); + break; + case REF_STATUS_REJECT_NODELETE: + print_ref_status('!', "[rejected]", ref, NULL, + "remote does not support deleting refs", porcelain); + break; + case REF_STATUS_UPTODATE: + print_ref_status('=', "[up to date]", ref, + ref->peer_ref, NULL, porcelain); + break; + case REF_STATUS_REJECT_NONFASTFORWARD: + print_ref_status('!', "[rejected]", ref, ref->peer_ref, + "non-fast-forward", porcelain); + break; + case REF_STATUS_REMOTE_REJECT: + print_ref_status('!', "[remote rejected]", ref, + ref->deletion ? NULL : ref->peer_ref, + ref->remote_status, porcelain); + break; + case REF_STATUS_EXPECTING_REPORT: + print_ref_status('!', "[remote failure]", ref, + ref->deletion ? NULL : ref->peer_ref, + "remote failed to report status", porcelain); + break; + case REF_STATUS_OK: + print_ok_ref_status(ref, porcelain); + break; + } + + return 1; +} + +void transport_print_push_status(const char *dest, struct ref *refs, + int verbose, int porcelain, int *nonfastforward) +{ + struct ref *ref; + int n = 0; + + if (verbose) { + for (ref = refs; ref; ref = ref->next) + if (ref->status == REF_STATUS_UPTODATE) + n += print_one_push_status(ref, dest, n, porcelain); + } + + for (ref = refs; ref; ref = ref->next) + if (ref->status == REF_STATUS_OK) + n += print_one_push_status(ref, dest, n, porcelain); + + *nonfastforward = 0; + for (ref = refs; ref; ref = ref->next) { + if (ref->status != REF_STATUS_NONE && + ref->status != REF_STATUS_UPTODATE && + ref->status != REF_STATUS_OK) + n += print_one_push_status(ref, dest, n, porcelain); + if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) + *nonfastforward = 1; + } +} + +void transport_verify_remote_names(int nr_heads, const char **heads) +{ + int i; + + for (i = 0; i < nr_heads; i++) { + const char *local = heads[i]; + const char *remote = strrchr(heads[i], ':'); + + if (*local == '+') + local++; + + /* A matching refspec is okay. */ + if (remote == local && remote[1] == '\0') + continue; + + remote = remote ? (remote + 1) : local; + if (check_refname_format(remote, + REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN)) + die("remote part of refspec is not a valid name in %s", + heads[i]); + } +} + +static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags) +{ + struct git_transport_data *data = transport->data; + struct send_pack_args args; + int ret; + + if (!data->got_remote_heads) { + struct ref *tmp_refs; + connect_setup(transport, 1, 0); + + get_remote_heads(data->fd[0], &tmp_refs, REF_NORMAL, NULL); + data->got_remote_heads = 1; + } + + memset(&args, 0, sizeof(args)); + args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR); + args.force_update = !!(flags & TRANSPORT_PUSH_FORCE); + args.use_thin_pack = data->options.thin; + args.verbose = (transport->verbose > 0); + args.quiet = (transport->verbose < 0); + args.progress = transport->progress; + args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN); + args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN); + + ret = send_pack(&args, data->fd, data->conn, remote_refs, + &data->extra_have); + + close(data->fd[1]); + close(data->fd[0]); + ret |= finish_connect(data->conn); + data->conn = NULL; + data->got_remote_heads = 0; + + return ret; +} + +static int connect_git(struct transport *transport, const char *name, + const char *executable, int fd[2]) +{ + struct git_transport_data *data = transport->data; + data->conn = git_connect(data->fd, transport->url, + executable, 0); + fd[0] = data->fd[0]; + fd[1] = data->fd[1]; + return 0; +} + +static int disconnect_git(struct transport *transport) +{ + struct git_transport_data *data = transport->data; + if (data->conn) { + if (data->got_remote_heads) + packet_flush(data->fd[1]); + close(data->fd[0]); + close(data->fd[1]); + finish_connect(data->conn); + } + + free(data); + return 0; +} + +void transport_take_over(struct transport *transport, + struct child_process *child) +{ + struct git_transport_data *data; + + if (!transport->smart_options) + die("Bug detected: Taking over transport requires non-NULL " + "smart_options field."); + + data = xcalloc(1, sizeof(*data)); + data->options = *transport->smart_options; + data->conn = child; + data->fd[0] = data->conn->out; + data->fd[1] = data->conn->in; + data->got_remote_heads = 0; + transport->data = data; + + transport->set_option = NULL; + transport->get_refs_list = get_refs_via_connect; + transport->fetch = fetch_refs_via_pack; + transport->push = NULL; + transport->push_refs = git_transport_push; + transport->disconnect = disconnect_git; + transport->smart_options = &(data->options); +} + +static int is_local(const char *url) +{ + const char *colon = strchr(url, ':'); + const char *slash = strchr(url, '/'); + return !colon || (slash && slash < colon) || + has_dos_drive_prefix(url); +} + +static int is_file(const char *url) +{ + struct stat buf; + if (stat(url, &buf)) + return 0; + return S_ISREG(buf.st_mode); +} + +static int external_specification_len(const char *url) +{ + return strchr(url, ':') - url; +} + +struct transport *transport_get(struct remote *remote, const char *url) +{ + const char *helper; + struct transport *ret = xcalloc(1, sizeof(*ret)); + + ret->progress = isatty(2); + + if (!remote) + die("No remote provided to transport_get()"); + + ret->got_remote_refs = 0; + ret->remote = remote; + helper = remote->foreign_vcs; + + if (!url && remote->url) + url = remote->url[0]; + ret->url = url; + + /* maybe it is a foreign URL? */ + if (url) { + const char *p = url; + + while (is_urlschemechar(p == url, *p)) + p++; + if (!prefixcmp(p, "::")) + helper = xstrndup(url, p - url); + } + + if (helper) { + transport_helper_init(ret, helper); + } else if (!prefixcmp(url, "rsync:")) { + ret->get_refs_list = get_refs_via_rsync; + ret->fetch = fetch_objs_via_rsync; + ret->push = rsync_transport_push; + ret->smart_options = NULL; + } else if (is_local(url) && is_file(url) && is_bundle(url, 1)) { + struct bundle_transport_data *data = xcalloc(1, sizeof(*data)); + ret->data = data; + ret->get_refs_list = get_refs_from_bundle; + ret->fetch = fetch_refs_from_bundle; + ret->disconnect = close_bundle; + ret->smart_options = NULL; + } else if (!is_url(url) + || !prefixcmp(url, "file://") + || !prefixcmp(url, "git://") + || !prefixcmp(url, "ssh://") + || !prefixcmp(url, "git+ssh://") + || !prefixcmp(url, "ssh+git://")) { + /* These are builtin smart transports. */ + struct git_transport_data *data = xcalloc(1, sizeof(*data)); + ret->data = data; + ret->set_option = NULL; + ret->get_refs_list = get_refs_via_connect; + ret->fetch = fetch_refs_via_pack; + ret->push_refs = git_transport_push; + ret->connect = connect_git; + ret->disconnect = disconnect_git; + ret->smart_options = &(data->options); + + data->conn = NULL; + data->got_remote_heads = 0; + } else { + /* Unknown protocol in URL. Pass to external handler. */ + int len = external_specification_len(url); + char *handler = xmalloc(len + 1); + handler[len] = 0; + strncpy(handler, url, len); + transport_helper_init(ret, handler); + } + + if (ret->smart_options) { + ret->smart_options->thin = 1; + ret->smart_options->uploadpack = "git-upload-pack"; + if (remote->uploadpack) + ret->smart_options->uploadpack = remote->uploadpack; + ret->smart_options->receivepack = "git-receive-pack"; + if (remote->receivepack) + ret->smart_options->receivepack = remote->receivepack; + } + + return ret; +} + +int transport_set_option(struct transport *transport, + const char *name, const char *value) +{ + int git_reports = 1, protocol_reports = 1; + + if (transport->smart_options) + git_reports = set_git_option(transport->smart_options, + name, value); + + if (transport->set_option) + protocol_reports = transport->set_option(transport, name, + value); + + /* If either report is 0, report 0 (success). */ + if (!git_reports || !protocol_reports) + return 0; + /* If either reports -1 (invalid value), report -1. */ + if ((git_reports == -1) || (protocol_reports == -1)) + return -1; + /* Otherwise if both report unknown, report unknown. */ + return 1; +} + +void transport_set_verbosity(struct transport *transport, int verbosity, + int force_progress) +{ + if (verbosity >= 1) + transport->verbose = verbosity <= 3 ? verbosity : 3; + if (verbosity < 0) + transport->verbose = -1; + + /** + * Rules used to determine whether to report progress (processing aborts + * when a rule is satisfied): + * + * . Report progress, if force_progress is 1 (ie. --progress). + * . Don't report progress, if force_progress is 0 (ie. --no-progress). + * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ). + * . Report progress if isatty(2) is 1. + **/ + if (force_progress >= 0) + transport->progress = !!force_progress; + else + transport->progress = verbosity >= 0 && isatty(2); +} + +int transport_push(struct transport *transport, + int refspec_nr, const char **refspec, int flags, + int *nonfastforward) +{ + *nonfastforward = 0; + transport_verify_remote_names(refspec_nr, refspec); + + if (transport->push) { + /* Maybe FIXME. But no important transport uses this case. */ + if (flags & TRANSPORT_PUSH_SET_UPSTREAM) + die("This transport does not support using --set-upstream"); + + return transport->push(transport, refspec_nr, refspec, flags); + } else if (transport->push_refs) { + struct ref *remote_refs = + transport->get_refs_list(transport, 1); + struct ref *local_refs = get_local_heads(); + int match_flags = MATCH_REFS_NONE; + int verbose = (transport->verbose > 0); + int quiet = (transport->verbose < 0); + int porcelain = flags & TRANSPORT_PUSH_PORCELAIN; + int pretend = flags & TRANSPORT_PUSH_DRY_RUN; + int push_ret, ret, err; + + if (flags & TRANSPORT_PUSH_ALL) + match_flags |= MATCH_REFS_ALL; + if (flags & TRANSPORT_PUSH_MIRROR) + match_flags |= MATCH_REFS_MIRROR; + if (flags & TRANSPORT_PUSH_PRUNE) + match_flags |= MATCH_REFS_PRUNE; + + if (match_push_refs(local_refs, &remote_refs, + refspec_nr, refspec, match_flags)) { + return -1; + } + + set_ref_status_for_push(remote_refs, + flags & TRANSPORT_PUSH_MIRROR, + flags & TRANSPORT_PUSH_FORCE); + + if ((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) && !is_bare_repository()) { + struct ref *ref = remote_refs; + for (; ref; ref = ref->next) + if (!is_null_sha1(ref->new_sha1) && + check_submodule_needs_pushing(ref->new_sha1,transport->remote->name)) + die("There are unpushed submodules, aborting."); + } + + push_ret = transport->push_refs(transport, remote_refs, flags); + err = push_had_errors(remote_refs); + ret = push_ret | err; + + if (!quiet || err) + transport_print_push_status(transport->url, remote_refs, + verbose | porcelain, porcelain, + nonfastforward); + + if (flags & TRANSPORT_PUSH_SET_UPSTREAM) + set_upstreams(transport, remote_refs, pretend); + + if (!(flags & TRANSPORT_PUSH_DRY_RUN)) { + struct ref *ref; + for (ref = remote_refs; ref; ref = ref->next) + transport_update_tracking_ref(transport->remote, ref, verbose); + } + + if (porcelain && !push_ret) + puts("Done"); + else if (!quiet && !ret && !transport_refs_pushed(remote_refs)) + fprintf(stderr, "Everything up-to-date\n"); + + return ret; + } + return 1; +} + +const struct ref *transport_get_remote_refs(struct transport *transport) +{ + if (!transport->got_remote_refs) { + transport->remote_refs = transport->get_refs_list(transport, 0); + transport->got_remote_refs = 1; + } + + return transport->remote_refs; +} + +int transport_fetch_refs(struct transport *transport, struct ref *refs) +{ + int rc; + int nr_heads = 0, nr_alloc = 0, nr_refs = 0; + struct ref **heads = NULL; + struct ref *rm; + + for (rm = refs; rm; rm = rm->next) { + nr_refs++; + if (rm->peer_ref && + !is_null_sha1(rm->old_sha1) && + !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1)) + continue; + ALLOC_GROW(heads, nr_heads + 1, nr_alloc); + heads[nr_heads++] = rm; + } + + if (!nr_heads) { + /* + * When deepening of a shallow repository is requested, + * then local and remote refs are likely to still be equal. + * Just feed them all to the fetch method in that case. + * This condition shouldn't be met in a non-deepening fetch + * (see builtin-fetch.c:quickfetch()). + */ + heads = xmalloc(nr_refs * sizeof(*heads)); + for (rm = refs; rm; rm = rm->next) + heads[nr_heads++] = rm; + } + + rc = transport->fetch(transport, nr_heads, heads); + + free(heads); + return rc; +} + +void transport_unlock_pack(struct transport *transport) +{ + if (transport->pack_lockfile) { + unlink_or_warn(transport->pack_lockfile); + free(transport->pack_lockfile); + transport->pack_lockfile = NULL; + } +} + +int transport_connect(struct transport *transport, const char *name, + const char *exec, int fd[2]) +{ + if (transport->connect) + return transport->connect(transport, name, exec, fd); + else + die("Operation not supported by protocol"); +} + +int transport_disconnect(struct transport *transport) +{ + int ret = 0; + if (transport->disconnect) + ret = transport->disconnect(transport); + free(transport); + return ret; +} + +/* + * Strip username (and password) from a URL and return + * it in a newly allocated string. + */ +char *transport_anonymize_url(const char *url) +{ + char *anon_url, *scheme_prefix, *anon_part; + size_t anon_len, prefix_len = 0; + + anon_part = strchr(url, '@'); + if (is_local(url) || !anon_part) + goto literal_copy; + + anon_len = strlen(++anon_part); + scheme_prefix = strstr(url, "://"); + if (!scheme_prefix) { + if (!strchr(anon_part, ':')) + /* cannot be "me@there:/path/name" */ + goto literal_copy; + } else { + const char *cp; + /* make sure scheme is reasonable */ + for (cp = url; cp < scheme_prefix; cp++) { + switch (*cp) { + /* RFC 1738 2.1 */ + case '+': case '.': case '-': + break; /* ok */ + default: + if (isalnum(*cp)) + break; + /* it isn't */ + goto literal_copy; + } + } + /* @ past the first slash does not count */ + cp = strchr(scheme_prefix + 3, '/'); + if (cp && cp < anon_part) + goto literal_copy; + prefix_len = scheme_prefix - url + 3; + } + anon_url = xcalloc(1, 1 + prefix_len + anon_len); + memcpy(anon_url, url, prefix_len); + memcpy(anon_url + prefix_len, anon_part, anon_len); + return anon_url; +literal_copy: + return xstrdup(url); +} + +struct alternate_refs_data { + alternate_ref_fn *fn; + void *data; +}; + +static int refs_from_alternate_cb(struct alternate_object_database *e, + void *data) +{ + char *other; + size_t len; + struct remote *remote; + struct transport *transport; + const struct ref *extra; + struct alternate_refs_data *cb = data; + + e->name[-1] = '\0'; + other = xstrdup(real_path(e->base)); + e->name[-1] = '/'; + len = strlen(other); + + while (other[len-1] == '/') + other[--len] = '\0'; + if (len < 8 || memcmp(other + len - 8, "/objects", 8)) + return 0; + /* Is this a git repository with refs? */ + memcpy(other + len - 8, "/refs", 6); + if (!is_directory(other)) + return 0; + other[len - 8] = '\0'; + remote = remote_get(other); + transport = transport_get(remote, other); + for (extra = transport_get_remote_refs(transport); + extra; + extra = extra->next) + cb->fn(extra, cb->data); + transport_disconnect(transport); + free(other); + return 0; +} + +void for_each_alternate_ref(alternate_ref_fn fn, void *data) +{ + struct alternate_refs_data cb; + cb.fn = fn; + cb.data = data; + foreach_alt_odb(refs_from_alternate_cb, &cb); +} |