/* * Builtin "git clone" * * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>, * 2008 Daniel Barkalow <barkalow@iabervon.org> * Based on git-commit.sh by Junio C Hamano and Linus Torvalds * * Clone a repository into a different directory that does not yet exist. */ #include "builtin.h" #include "config.h" #include "lockfile.h" #include "parse-options.h" #include "fetch-pack.h" #include "refs.h" #include "tree.h" #include "tree-walk.h" #include "unpack-trees.h" #include "transport.h" #include "strbuf.h" #include "dir.h" #include "sigchain.h" #include "branch.h" #include "remote.h" #include "run-command.h" #include "connected.h" #include "packfile.h" #include "list-objects-filter-options.h" /* * Overall FIXMEs: * - respect DB_ENVIRONMENT for .git/objects. * * Implementation notes: * - dropping use-separate-remote and no-separate-remote compatibility * */ static const char * const builtin_clone_usage[] = { N_("git clone [<options>] [--] <repo> [<dir>]"), NULL }; static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1; static int option_local = -1, option_no_hardlinks, option_shared; static int option_no_tags; static int option_shallow_submodules; static int deepen; static char *option_template, *option_depth, *option_since; static char *option_origin = NULL; static char *option_branch = NULL; static struct string_list option_not = STRING_LIST_INIT_NODUP; static const char *real_git_dir; static char *option_upload_pack = "git-upload-pack"; static int option_verbosity; static int option_progress = -1; static enum transport_family family; static struct string_list option_config = STRING_LIST_INIT_NODUP; static struct string_list option_required_reference = STRING_LIST_INIT_NODUP; static struct string_list option_optional_reference = STRING_LIST_INIT_NODUP; static int option_dissociate; static int max_jobs = -1; static struct string_list option_recurse_submodules = STRING_LIST_INIT_NODUP; static struct list_objects_filter_options filter_options; static int recurse_submodules_cb(const struct option *opt, const char *arg, int unset) { if (unset) string_list_clear((struct string_list *)opt->value, 0); else if (arg) string_list_append((struct string_list *)opt->value, arg); else string_list_append((struct string_list *)opt->value, (const char *)opt->defval); return 0; } static struct option builtin_clone_options[] = { OPT__VERBOSITY(&option_verbosity), OPT_BOOL(0, "progress", &option_progress, N_("force progress reporting")), OPT_BOOL('n', "no-checkout", &option_no_checkout, N_("don't create a checkout")), OPT_BOOL(0, "bare", &option_bare, N_("create a bare repository")), OPT_HIDDEN_BOOL(0, "naked", &option_bare, N_("create a bare repository")), OPT_BOOL(0, "mirror", &option_mirror, N_("create a mirror repository (implies bare)")), OPT_BOOL('l', "local", &option_local, N_("to clone from a local repository")), OPT_BOOL(0, "no-hardlinks", &option_no_hardlinks, N_("don't use local hardlinks, always copy")), OPT_BOOL('s', "shared", &option_shared, N_("setup as shared repository")), { OPTION_CALLBACK, 0, "recursive", &option_recurse_submodules, N_("pathspec"), N_("initialize submodules in the clone"), PARSE_OPT_OPTARG | PARSE_OPT_HIDDEN, recurse_submodules_cb, (intptr_t)"." }, { OPTION_CALLBACK, 0, "recurse-submodules", &option_recurse_submodules, N_("pathspec"), N_("initialize submodules in the clone"), PARSE_OPT_OPTARG, recurse_submodules_cb, (intptr_t)"." }, OPT_INTEGER('j', "jobs", &max_jobs, N_("number of submodules cloned in parallel")), OPT_STRING(0, "template", &option_template, N_("template-directory"), N_("directory from which templates will be used")), OPT_STRING_LIST(0, "reference", &option_required_reference, N_("repo"), N_("reference repository")), OPT_STRING_LIST(0, "reference-if-able", &option_optional_reference, N_("repo"), N_("reference repository")), OPT_BOOL(0, "dissociate", &option_dissociate, N_("use --reference only while cloning")), OPT_STRING('o', "origin", &option_origin, N_("name"), N_("use <name> instead of 'origin' to track upstream")), OPT_STRING('b', "branch", &option_branch, N_("branch"), N_("checkout <branch> instead of the remote's HEAD")), OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"), N_("path to git-upload-pack on the remote")), OPT_STRING(0, "depth", &option_depth, N_("depth"), N_("create a shallow clone of that depth")), OPT_STRING(0, "shallow-since", &option_since, N_("time"), N_("create a shallow clone since a specific time")), OPT_STRING_LIST(0, "shallow-exclude", &option_not, N_("revision"), N_("deepen history of shallow clone, excluding rev")), OPT_BOOL(0, "single-branch", &option_single_branch, N_("clone only one branch, HEAD or --branch")), OPT_BOOL(0, "no-tags", &option_no_tags, N_("don't clone any tags, and make later fetches not to follow them")), OPT_BOOL(0, "shallow-submodules", &option_shallow_submodules, N_("any cloned submodules will be shallow")), OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"), N_("separate git dir from working tree")), OPT_STRING_LIST('c', "config", &option_config, N_("key=value"), N_("set config inside the new repository")), OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"), TRANSPORT_FAMILY_IPV4), OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"), TRANSPORT_FAMILY_IPV6), OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options), OPT_END() }; static const char *get_repo_path_1(struct strbuf *path, int *is_bundle) { static char *suffix[] = { "/.git", "", ".git/.git", ".git" }; static char *bundle_suffix[] = { ".bundle", "" }; size_t baselen = path->len; struct stat st; int i; for (i = 0; i < ARRAY_SIZE(suffix); i++) { strbuf_setlen(path, baselen); strbuf_addstr(path, suffix[i]); if (stat(path->buf, &st)) continue; if (S_ISDIR(st.st_mode) && is_git_directory(path->buf)) { *is_bundle = 0; return path->buf; } else if (S_ISREG(st.st_mode) && st.st_size > 8) { /* Is it a "gitfile"? */ char signature[8]; const char *dst; int len, fd = open(path->buf, O_RDONLY); if (fd < 0) continue; len = read_in_full(fd, signature, 8); close(fd); if (len != 8 || strncmp(signature, "gitdir: ", 8)) continue; dst = read_gitfile(path->buf); if (dst) { *is_bundle = 0; return dst; } } } for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) { strbuf_setlen(path, baselen); strbuf_addstr(path, bundle_suffix[i]); if (!stat(path->buf, &st) && S_ISREG(st.st_mode)) { *is_bundle = 1; return path->buf; } } return NULL; } static char *get_repo_path(const char *repo, int *is_bundle) { struct strbuf path = STRBUF_INIT; const char *raw; char *canon; strbuf_addstr(&path, repo); raw = get_repo_path_1(&path, is_bundle); canon = raw ? absolute_pathdup(raw) : NULL; strbuf_release(&path); return canon; } static char *guess_dir_name(const char *repo, int is_bundle, int is_bare) { const char *end = repo + strlen(repo), *start, *ptr; size_t len; char *dir; /* * Skip scheme. */ start = strstr(repo, "://"); if (start == NULL) start = repo; else start += 3; /* * Skip authentication data. The stripping does happen * greedily, such that we strip up to the last '@' inside * the host part. */ for (ptr = start; ptr < end && !is_dir_sep(*ptr); ptr++) { if (*ptr == '@') start = ptr + 1; } /* * Strip trailing spaces, slashes and /.git */ while (start < end && (is_dir_sep(end[-1]) || isspace(end[-1]))) end--; if (end - start > 5 && is_dir_sep(end[-5]) && !strncmp(end - 4, ".git", 4)) { end -= 5; while (start < end && is_dir_sep(end[-1])) end--; } /* * Strip trailing port number if we've got only a * hostname (that is, there is no dir separator but a * colon). This check is required such that we do not * strip URI's like '/foo/bar:2222.git', which should * result in a dir '2222' being guessed due to backwards * compatibility. */ if (memchr(start, '/', end - start) == NULL && memchr(start, ':', end - start) != NULL) { ptr = end; while (start < ptr && isdigit(ptr[-1]) && ptr[-1] != ':') ptr--; if (start < ptr && ptr[-1] == ':') end = ptr - 1; } /* * Find last component. To remain backwards compatible we * also regard colons as path separators, such that * cloning a repository 'foo:bar.git' would result in a * directory 'bar' being guessed. */ ptr = end; while (start < ptr && !is_dir_sep(ptr[-1]) && ptr[-1] != ':') ptr--; start = ptr; /* * Strip .{bundle,git}. */ len = end - start; strip_suffix_mem(start, &len, is_bundle ? ".bundle" : ".git"); if (!len || (len == 1 && *start == '/')) die(_("No directory name could be guessed.\n" "Please specify a directory on the command line")); if (is_bare) dir = xstrfmt("%.*s.git", (int)len, start); else dir = xstrndup(start, len); /* * Replace sequences of 'control' characters and whitespace * with one ascii space, remove leading and trailing spaces. */ if (*dir) { char *out = dir; int prev_space = 1 /* strip leading whitespace */; for (end = dir; *end; ++end) { char ch = *end; if ((unsigned char)ch < '\x20') ch = '\x20'; if (isspace(ch)) { if (prev_space) continue; prev_space = 1; } else prev_space = 0; *out++ = ch; } *out = '\0'; if (out > dir && prev_space) out[-1] = '\0'; } return dir; } static void strip_trailing_slashes(char *dir) { char *end = dir + strlen(dir); while (dir < end - 1 && is_dir_sep(end[-1])) end--; *end = '\0'; } static int add_one_reference(struct string_list_item *item, void *cb_data) { struct strbuf err = STRBUF_INIT; int *required = cb_data; char *ref_git = compute_alternate_path(item->string, &err); if (!ref_git) { if (*required) die("%s", err.buf); else fprintf(stderr, _("info: Could not add alternate for '%s': %s\n"), item->string, err.buf); } else { struct strbuf sb = STRBUF_INIT; strbuf_addf(&sb, "%s/objects", ref_git); add_to_alternates_file(sb.buf); strbuf_release(&sb); } strbuf_release(&err); free(ref_git); return 0; } static void setup_reference(void) { int required = 1; for_each_string_list(&option_required_reference, add_one_reference, &required); required = 0; for_each_string_list(&option_optional_reference, add_one_reference, &required); } static void copy_alternates(struct strbuf *src, struct strbuf *dst, const char *src_repo) { /* * Read from the source objects/info/alternates file * and copy the entries to corresponding file in the * destination repository with add_to_alternates_file(). * Both src and dst have "$path/objects/info/alternates". * * Instead of copying bit-for-bit from the original, * we need to append to existing one so that the already * created entry via "clone -s" is not lost, and also * to turn entries with paths relative to the original * absolute, so that they can be used in the new repository. */ FILE *in = xfopen(src->buf, "r"); struct strbuf line = STRBUF_INIT; while (strbuf_getline(&line, in) != EOF) { char *abs_path; if (!line.len || line.buf[0] == '#') continue; if (is_absolute_path(line.buf)) { add_to_alternates_file(line.buf); continue; } abs_path = mkpathdup("%s/objects/%s", src_repo, line.buf); if (!normalize_path_copy(abs_path, abs_path)) add_to_alternates_file(abs_path); else warning("skipping invalid relative alternate: %s/%s", src_repo, line.buf); free(abs_path); } strbuf_release(&line); fclose(in); } static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest, const char *src_repo, int src_baselen) { struct dirent *de; struct stat buf; int src_len, dest_len; DIR *dir; dir = opendir(src->buf); if (!dir) die_errno(_("failed to open '%s'"), src->buf); if (mkdir(dest->buf, 0777)) { if (errno != EEXIST) die_errno(_("failed to create directory '%s'"), dest->buf); else if (stat(dest->buf, &buf)) die_errno(_("failed to stat '%s'"), dest->buf); else if (!S_ISDIR(buf.st_mode)) die(_("%s exists and is not a directory"), dest->buf); } strbuf_addch(src, '/'); src_len = src->len; strbuf_addch(dest, '/'); dest_len = dest->len; while ((de = readdir(dir)) != NULL) { strbuf_setlen(src, src_len); strbuf_addstr(src, de->d_name); strbuf_setlen(dest, dest_len); strbuf_addstr(dest, de->d_name); if (stat(src->buf, &buf)) { warning (_("failed to stat %s\n"), src->buf); continue; } if (S_ISDIR(buf.st_mode)) { if (de->d_name[0] != '.') copy_or_link_directory(src, dest, src_repo, src_baselen); continue; } /* Files that cannot be copied bit-for-bit... */ if (!strcmp(src->buf + src_baselen, "/info/alternates")) { copy_alternates(src, dest, src_repo); continue; } if (unlink(dest->buf) && errno != ENOENT) die_errno(_("failed to unlink '%s'"), dest->buf); if (!option_no_hardlinks) { if (!link(src->buf, dest->buf)) continue; if (option_local > 0) die_errno(_("failed to create link '%s'"), dest->buf); option_no_hardlinks = 1; } if (copy_file_with_time(dest->buf, src->buf, 0666)) die_errno(_("failed to copy file to '%s'"), dest->buf); } closedir(dir); } static void clone_local(const char *src_repo, const char *dest_repo) { if (option_shared) { struct strbuf alt = STRBUF_INIT; get_common_dir(&alt, src_repo); strbuf_addstr(&alt, "/objects"); add_to_alternates_file(alt.buf); strbuf_release(&alt); } else { struct strbuf src = STRBUF_INIT; struct strbuf dest = STRBUF_INIT; get_common_dir(&src, src_repo); get_common_dir(&dest, dest_repo); strbuf_addstr(&src, "/objects"); strbuf_addstr(&dest, "/objects"); copy_or_link_directory(&src, &dest, src_repo, src.len); strbuf_release(&src); strbuf_release(&dest); } if (0 <= option_verbosity) fprintf(stderr, _("done.\n")); } static const char *junk_work_tree; static int junk_work_tree_flags; static const char *junk_git_dir; static int junk_git_dir_flags; static enum { JUNK_LEAVE_NONE, JUNK_LEAVE_REPO, JUNK_LEAVE_ALL } junk_mode = JUNK_LEAVE_NONE; static const char junk_leave_repo_msg[] = N_("Clone succeeded, but checkout failed.\n" "You can inspect what was checked out with 'git status'\n" "and retry the checkout with 'git checkout -f HEAD'\n"); static void remove_junk(void) { struct strbuf sb = STRBUF_INIT; switch (junk_mode) { case JUNK_LEAVE_REPO: warning("%s", _(junk_leave_repo_msg)); /* fall-through */ case JUNK_LEAVE_ALL: return; default: /* proceed to removal */ break; } if (junk_git_dir) { strbuf_addstr(&sb, junk_git_dir); remove_dir_recursively(&sb, junk_git_dir_flags); strbuf_reset(&sb); } if (junk_work_tree) { strbuf_addstr(&sb, junk_work_tree); remove_dir_recursively(&sb, junk_work_tree_flags); } strbuf_release(&sb); } static void remove_junk_on_signal(int signo) { remove_junk(); sigchain_pop(signo); raise(signo); } static struct ref *find_remote_branch(const struct ref *refs, const char *branch) { struct ref *ref; struct strbuf head = STRBUF_INIT; strbuf_addstr(&head, "refs/heads/"); strbuf_addstr(&head, branch); ref = find_ref_by_name(refs, head.buf); strbuf_release(&head); if (ref) return ref; strbuf_addstr(&head, "refs/tags/"); strbuf_addstr(&head, branch); ref = find_ref_by_name(refs, head.buf); strbuf_release(&head); return ref; } static struct ref *wanted_peer_refs(const struct ref *refs, struct refspec *refspec) { struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD")); struct ref *local_refs = head; struct ref **tail = head ? &head->next : &local_refs; if (option_single_branch) { struct ref *remote_head = NULL; if (!option_branch) remote_head = guess_remote_head(head, refs, 0); else { local_refs = NULL; tail = &local_refs; remote_head = copy_ref(find_remote_branch(refs, option_branch)); } if (!remote_head && option_branch) warning(_("Could not find remote branch %s to clone."), option_branch); else { get_fetch_map(remote_head, refspec, &tail, 0); /* if --branch=tag, pull the requested tag explicitly */ get_fetch_map(remote_head, tag_refspec, &tail, 0); } } else get_fetch_map(refs, refspec, &tail, 0); if (!option_mirror && !option_single_branch && !option_no_tags) get_fetch_map(refs, tag_refspec, &tail, 0); return local_refs; } static void write_remote_refs(const struct ref *local_refs) { const struct ref *r; struct ref_transaction *t; struct strbuf err = STRBUF_INIT; t = ref_transaction_begin(&err); if (!t) die("%s", err.buf); for (r = local_refs; r; r = r->next) { if (!r->peer_ref) continue; if (ref_transaction_create(t, r->peer_ref->name, &r->old_oid, 0, NULL, &err)) die("%s", err.buf); } if (initial_ref_transaction_commit(t, &err)) die("%s", err.buf); strbuf_release(&err); ref_transaction_free(t); } static void write_followtags(const struct ref *refs, const char *msg) { const struct ref *ref; for (ref = refs; ref; ref = ref->next) { if (!starts_with(ref->name, "refs/tags/")) continue; if (ends_with(ref->name, "^{}")) continue; if (!has_object_file(&ref->old_oid)) continue; update_ref(msg, ref->name, &ref->old_oid, NULL, 0, UPDATE_REFS_DIE_ON_ERR); } } static int iterate_ref_map(void *cb_data, struct object_id *oid) { struct ref **rm = cb_data; struct ref *ref = *rm; /* * Skip anything missing a peer_ref, which we are not * actually going to write a ref for. */ while (ref && !ref->peer_ref) ref = ref->next; /* Returning -1 notes "end of list" to the caller. */ if (!ref) return -1; oidcpy(oid, &ref->old_oid); *rm = ref->next; return 0; } static void update_remote_refs(const struct ref *refs, const struct ref *mapped_refs, const struct ref *remote_head_points_at, const char *branch_top, const char *msg, struct transport *transport, int check_connectivity) { const struct ref *rm = mapped_refs; if (check_connectivity) { struct check_connected_options opt = CHECK_CONNECTED_INIT; opt.transport = transport; opt.progress = transport->progress; if (check_connected(iterate_ref_map, &rm, &opt)) die(_("remote did not send all necessary objects")); } if (refs) { write_remote_refs(mapped_refs); if (option_single_branch && !option_no_tags) write_followtags(refs, msg); } if (remote_head_points_at && !option_bare) { struct strbuf head_ref = STRBUF_INIT; strbuf_addstr(&head_ref, branch_top); strbuf_addstr(&head_ref, "HEAD"); if (create_symref(head_ref.buf, remote_head_points_at->peer_ref->name, msg) < 0) die(_("unable to update %s"), head_ref.buf); strbuf_release(&head_ref); } } static void update_head(const struct ref *our, const struct ref *remote, const char *msg) { const char *head; if (our && skip_prefix(our->name, "refs/heads/", &head)) { /* Local default branch link */ if (create_symref("HEAD", our->name, NULL) < 0) die(_("unable to update HEAD")); if (!option_bare) { update_ref(msg, "HEAD", &our->old_oid, NULL, 0, UPDATE_REFS_DIE_ON_ERR); install_branch_config(0, head, option_origin, our->name); } } else if (our) { struct commit *c = lookup_commit_reference(&our->old_oid); /* --branch specifies a non-branch (i.e. tags), detach HEAD */ update_ref(msg, "HEAD", &c->object.oid, NULL, REF_NO_DEREF, UPDATE_REFS_DIE_ON_ERR); } else if (remote) { /* * We know remote HEAD points to a non-branch, or * HEAD points to a branch but we don't know which one. * Detach HEAD in all these cases. */ update_ref(msg, "HEAD", &remote->old_oid, NULL, REF_NO_DEREF, UPDATE_REFS_DIE_ON_ERR); } } static int checkout(int submodule_progress) { struct object_id oid; char *head; struct lock_file lock_file = LOCK_INIT; struct unpack_trees_options opts; struct tree *tree; struct tree_desc t; int err = 0; if (option_no_checkout) return 0; head = resolve_refdup("HEAD", RESOLVE_REF_READING, &oid, NULL); if (!head) { warning(_("remote HEAD refers to nonexistent ref, " "unable to checkout.\n")); return 0; } if (!strcmp(head, "HEAD")) { if (advice_detached_head) detach_advice(oid_to_hex(&oid)); } else { if (!starts_with(head, "refs/heads/")) die(_("HEAD not found below refs/heads!")); } free(head); /* We need to be in the new work tree for the checkout */ setup_work_tree(); hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR); memset(&opts, 0, sizeof opts); opts.update = 1; opts.merge = 1; opts.fn = oneway_merge; opts.verbose_update = (option_verbosity >= 0); opts.src_index = &the_index; opts.dst_index = &the_index; tree = parse_tree_indirect(&oid); parse_tree(tree); init_tree_desc(&t, tree->buffer, tree->size); if (unpack_trees(1, &t, &opts) < 0) die(_("unable to checkout working tree")); if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK)) die(_("unable to write new index file")); err |= run_hook_le(NULL, "post-checkout", sha1_to_hex(null_sha1), oid_to_hex(&oid), "1", NULL); if (!err && (option_recurse_submodules.nr > 0)) { struct argv_array args = ARGV_ARRAY_INIT; argv_array_pushl(&args, "submodule", "update", "--init", "--recursive", NULL); if (option_shallow_submodules == 1) argv_array_push(&args, "--depth=1"); if (max_jobs != -1) argv_array_pushf(&args, "--jobs=%d", max_jobs); if (submodule_progress) argv_array_push(&args, "--progress"); if (option_verbosity < 0) argv_array_push(&args, "--quiet"); err = run_command_v_opt(args.argv, RUN_GIT_CMD); argv_array_clear(&args); } return err; } static int write_one_config(const char *key, const char *value, void *data) { return git_config_set_multivar_gently(key, value ? value : "true", CONFIG_REGEX_NONE, 0); } static void write_config(struct string_list *config) { int i; for (i = 0; i < config->nr; i++) { if (git_config_parse_parameter(config->items[i].string, write_one_config, NULL) < 0) die(_("unable to write parameters to config file")); } } static void write_refspec_config(const char *src_ref_prefix, const struct ref *our_head_points_at, const struct ref *remote_head_points_at, struct strbuf *branch_top) { struct strbuf key = STRBUF_INIT; struct strbuf value = STRBUF_INIT; if (option_mirror || !option_bare) { if (option_single_branch && !option_mirror) { if (option_branch) { if (starts_with(our_head_points_at->name, "refs/tags/")) strbuf_addf(&value, "+%s:%s", our_head_points_at->name, our_head_points_at->name); else strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name, branch_top->buf, option_branch); } else if (remote_head_points_at) { const char *head = remote_head_points_at->name; if (!skip_prefix(head, "refs/heads/", &head)) die("BUG: remote HEAD points at non-head?"); strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name, branch_top->buf, head); } /* * otherwise, the next "git fetch" will * simply fetch from HEAD without updating * any remote-tracking branch, which is what * we want. */ } else { strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf); } /* Configure the remote */ if (value.len) { strbuf_addf(&key, "remote.%s.fetch", option_origin); git_config_set_multivar(key.buf, value.buf, "^$", 0); strbuf_reset(&key); if (option_mirror) { strbuf_addf(&key, "remote.%s.mirror", option_origin); git_config_set(key.buf, "true"); strbuf_reset(&key); } } } strbuf_release(&key); strbuf_release(&value); } static void dissociate_from_references(void) { static const char* argv[] = { "repack", "-a", "-d", NULL }; char *alternates = git_pathdup("objects/info/alternates"); if (!access(alternates, F_OK)) { if (run_command_v_opt(argv, RUN_GIT_CMD|RUN_COMMAND_NO_STDIN)) die(_("cannot repack to clean up")); if (unlink(alternates) && errno != ENOENT) die_errno(_("cannot unlink temporary alternates file")); } free(alternates); } static int dir_exists(const char *path) { struct stat sb; return !stat(path, &sb); } int cmd_clone(int argc, const char **argv, const char *prefix) { int is_bundle = 0, is_local; const char *repo_name, *repo, *work_tree, *git_dir; char *path, *dir; int dest_exists; const struct ref *refs, *remote_head; const struct ref *remote_head_points_at; const struct ref *our_head_points_at; struct ref *mapped_refs; const struct ref *ref; struct strbuf key = STRBUF_INIT, value = STRBUF_INIT; struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT; struct transport *transport = NULL; const char *src_ref_prefix = "refs/heads/"; struct remote *remote; int err = 0, complete_refs_before_fetch = 1; int submodule_progress; struct refspec *refspec; const char *fetch_pattern; fetch_if_missing = 0; packet_trace_identity("clone"); argc = parse_options(argc, argv, prefix, builtin_clone_options, builtin_clone_usage, 0); if (argc > 2) usage_msg_opt(_("Too many arguments."), builtin_clone_usage, builtin_clone_options); if (argc == 0) usage_msg_opt(_("You must specify a repository to clone."), builtin_clone_usage, builtin_clone_options); if (option_depth || option_since || option_not.nr) deepen = 1; if (option_single_branch == -1) option_single_branch = deepen ? 1 : 0; if (option_mirror) option_bare = 1; if (option_bare) { if (option_origin) die(_("--bare and --origin %s options are incompatible."), option_origin); if (real_git_dir) die(_("--bare and --separate-git-dir are incompatible.")); option_no_checkout = 1; } if (!option_origin) option_origin = "origin"; repo_name = argv[0]; path = get_repo_path(repo_name, &is_bundle); if (path) repo = absolute_pathdup(repo_name); else if (!strchr(repo_name, ':')) die(_("repository '%s' does not exist"), repo_name); else repo = repo_name; /* no need to be strict, transport_set_option() will validate it again */ if (option_depth && atoi(option_depth) < 1) die(_("depth %s is not a positive number"), option_depth); if (argc == 2) dir = xstrdup(argv[1]); else dir = guess_dir_name(repo_name, is_bundle, option_bare); strip_trailing_slashes(dir); dest_exists = dir_exists(dir); if (dest_exists && !is_empty_dir(dir)) die(_("destination path '%s' already exists and is not " "an empty directory."), dir); strbuf_addf(&reflog_msg, "clone: from %s", repo); if (option_bare) work_tree = NULL; else { work_tree = getenv("GIT_WORK_TREE"); if (work_tree && dir_exists(work_tree)) die(_("working tree '%s' already exists."), work_tree); } if (option_bare || work_tree) git_dir = xstrdup(dir); else { work_tree = dir; git_dir = mkpathdup("%s/.git", dir); } atexit(remove_junk); sigchain_push_common(remove_junk_on_signal); if (!option_bare) { if (safe_create_leading_directories_const(work_tree) < 0) die_errno(_("could not create leading directories of '%s'"), work_tree); if (dest_exists) junk_work_tree_flags |= REMOVE_DIR_KEEP_TOPLEVEL; else if (mkdir(work_tree, 0777)) die_errno(_("could not create work tree dir '%s'"), work_tree); junk_work_tree = work_tree; set_git_work_tree(work_tree); } if (real_git_dir) { if (dir_exists(real_git_dir)) junk_git_dir_flags |= REMOVE_DIR_KEEP_TOPLEVEL; junk_git_dir = real_git_dir; } else { if (dest_exists) junk_git_dir_flags |= REMOVE_DIR_KEEP_TOPLEVEL; junk_git_dir = git_dir; } if (safe_create_leading_directories_const(git_dir) < 0) die(_("could not create leading directories of '%s'"), git_dir); if (0 <= option_verbosity) { if (option_bare) fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir); else fprintf(stderr, _("Cloning into '%s'...\n"), dir); } if (option_recurse_submodules.nr > 0) { struct string_list_item *item; struct strbuf sb = STRBUF_INIT; /* remove duplicates */ string_list_sort(&option_recurse_submodules); string_list_remove_duplicates(&option_recurse_submodules, 0); /* * NEEDSWORK: In a multi-working-tree world, this needs to be * set in the per-worktree config. */ for_each_string_list_item(item, &option_recurse_submodules) { strbuf_addf(&sb, "submodule.active=%s", item->string); string_list_append(&option_config, strbuf_detach(&sb, NULL)); } if (option_required_reference.nr && option_optional_reference.nr) die(_("clone --recursive is not compatible with " "both --reference and --reference-if-able")); else if (option_required_reference.nr) { string_list_append(&option_config, "submodule.alternateLocation=superproject"); string_list_append(&option_config, "submodule.alternateErrorStrategy=die"); } else if (option_optional_reference.nr) { string_list_append(&option_config, "submodule.alternateLocation=superproject"); string_list_append(&option_config, "submodule.alternateErrorStrategy=info"); } } init_db(git_dir, real_git_dir, option_template, INIT_DB_QUIET); if (real_git_dir) git_dir = real_git_dir; write_config(&option_config); git_config(git_default_config, NULL); if (option_bare) { if (option_mirror) src_ref_prefix = "refs/"; strbuf_addstr(&branch_top, src_ref_prefix); git_config_set("core.bare", "true"); } else { strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin); } strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf); strbuf_addf(&key, "remote.%s.url", option_origin); git_config_set(key.buf, repo); strbuf_reset(&key); if (option_no_tags) { strbuf_addf(&key, "remote.%s.tagOpt", option_origin); git_config_set(key.buf, "--no-tags"); strbuf_reset(&key); } if (option_required_reference.nr || option_optional_reference.nr) setup_reference(); fetch_pattern = value.buf; refspec = parse_fetch_refspec(1, &fetch_pattern); strbuf_reset(&value); remote = remote_get(option_origin); transport = transport_get(remote, remote->url[0]); transport_set_verbosity(transport, option_verbosity, option_progress); transport->family = family; path = get_repo_path(remote->url[0], &is_bundle); is_local = option_local != 0 && path && !is_bundle; if (is_local) { if (option_depth) warning(_("--depth is ignored in local clones; use file:// instead.")); if (option_since) warning(_("--shallow-since is ignored in local clones; use file:// instead.")); if (option_not.nr) warning(_("--shallow-exclude is ignored in local clones; use file:// instead.")); if (filter_options.choice) warning(_("--filter is ignored in local clones; use file:// instead.")); if (!access(mkpath("%s/shallow", path), F_OK)) { if (option_local > 0) warning(_("source repository is shallow, ignoring --local")); is_local = 0; } } if (option_local > 0 && !is_local) warning(_("--local is ignored")); transport->cloning = 1; transport_set_option(transport, TRANS_OPT_KEEP, "yes"); if (option_depth) transport_set_option(transport, TRANS_OPT_DEPTH, option_depth); if (option_since) transport_set_option(transport, TRANS_OPT_DEEPEN_SINCE, option_since); if (option_not.nr) transport_set_option(transport, TRANS_OPT_DEEPEN_NOT, (const char *)&option_not); if (option_single_branch) transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1"); if (option_upload_pack) transport_set_option(transport, TRANS_OPT_UPLOADPACK, option_upload_pack); if (filter_options.choice) { transport_set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, filter_options.filter_spec); transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1"); } if (transport->smart_options && !deepen && !filter_options.choice) transport->smart_options->check_self_contained_and_connected = 1; refs = transport_get_remote_refs(transport); if (refs) { mapped_refs = wanted_peer_refs(refs, refspec); /* * transport_get_remote_refs() may return refs with null sha-1 * in mapped_refs (see struct transport->get_refs_list * comment). In that case we need fetch it early because * remote_head code below relies on it. * * for normal clones, transport_get_remote_refs() should * return reliable ref set, we can delay cloning until after * remote HEAD check. */ for (ref = refs; ref; ref = ref->next) if (is_null_oid(&ref->old_oid)) { complete_refs_before_fetch = 0; break; } if (!is_local && !complete_refs_before_fetch) transport_fetch_refs(transport, mapped_refs); remote_head = find_ref_by_name(refs, "HEAD"); remote_head_points_at = guess_remote_head(remote_head, mapped_refs, 0); if (option_branch) { our_head_points_at = find_remote_branch(mapped_refs, option_branch); if (!our_head_points_at) die(_("Remote branch %s not found in upstream %s"), option_branch, option_origin); } else our_head_points_at = remote_head_points_at; } else { if (option_branch) die(_("Remote branch %s not found in upstream %s"), option_branch, option_origin); warning(_("You appear to have cloned an empty repository.")); mapped_refs = NULL; our_head_points_at = NULL; remote_head_points_at = NULL; remote_head = NULL; option_no_checkout = 1; if (!option_bare) install_branch_config(0, "master", option_origin, "refs/heads/master"); } write_refspec_config(src_ref_prefix, our_head_points_at, remote_head_points_at, &branch_top); if (filter_options.choice) partial_clone_register("origin", &filter_options); if (is_local) clone_local(path, git_dir); else if (refs && complete_refs_before_fetch) transport_fetch_refs(transport, mapped_refs); update_remote_refs(refs, mapped_refs, remote_head_points_at, branch_top.buf, reflog_msg.buf, transport, !is_local && !filter_options.choice); update_head(our_head_points_at, remote_head, reflog_msg.buf); /* * We want to show progress for recursive submodule clones iff * we did so for the main clone. But only the transport knows * the final decision for this flag, so we need to rescue the value * before we free the transport. */ submodule_progress = transport->progress; transport_unlock_pack(transport); transport_disconnect(transport); if (option_dissociate) { close_all_packs(); dissociate_from_references(); } junk_mode = JUNK_LEAVE_REPO; fetch_if_missing = 1; err = checkout(submodule_progress); strbuf_release(&reflog_msg); strbuf_release(&branch_top); strbuf_release(&key); strbuf_release(&value); junk_mode = JUNK_LEAVE_ALL; free(refspec); return err; }