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Diffstat (limited to 'builtin/clone.c')
| -rw-r--r-- | builtin/clone.c | 1400 |
1 files changed, 1400 insertions, 0 deletions
diff --git a/builtin/clone.c b/builtin/clone.c new file mode 100644 index 0000000..3c2ae31 --- /dev/null +++ b/builtin/clone.c @@ -0,0 +1,1400 @@ +/* + * 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. + */ + +#define USE_THE_INDEX_VARIABLE +#include "builtin.h" +#include "config.h" +#include "lockfile.h" +#include "parse-options.h" +#include "fetch-pack.h" +#include "refs.h" +#include "refspec.h" +#include "object-store.h" +#include "tree.h" +#include "tree-walk.h" +#include "unpack-trees.h" +#include "transport.h" +#include "strbuf.h" +#include "dir.h" +#include "dir-iterator.h" +#include "iterator.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" +#include "hook.h" +#include "bundle.h" +#include "bundle-uri.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 option_reject_shallow = -1; /* unspecified */ +static int config_reject_shallow = -1; /* unspecified */ +static int deepen; +static char *option_template, *option_depth, *option_since; +static char *option_origin = NULL; +static char *remote_name = 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 int option_sparse_checkout; +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 = LIST_OBJECTS_FILTER_INIT; +static int option_filter_submodules = -1; /* unspecified */ +static int config_filter_submodules = -1; /* unspecified */ +static struct string_list server_options = STRING_LIST_INIT_NODUP; +static int option_remote_submodules; +static const char *bundle_uri; + +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(0, "reject-shallow", &option_reject_shallow, + N_("don't clone shallow repository")), + 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, "recurse-submodules", &option_recurse_submodules, + N_("pathspec"), N_("initialize submodules in the clone"), + PARSE_OPT_OPTARG, recurse_submodules_cb, (intptr_t)"." }, + OPT_ALIAS(0, "recursive", "recurse-submodules"), + 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_STRING_LIST(0, "server-option", &server_options, + N_("server-specific"), N_("option to transmit")), + 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_BOOL(0, "also-filter-submodules", &option_filter_submodules, + N_("apply partial clone filters to submodules")), + OPT_BOOL(0, "remote-submodules", &option_remote_submodules, + N_("any cloned submodules will use their remote-tracking branch")), + OPT_BOOL(0, "sparse", &option_sparse_checkout, + N_("initialize sparse-checkout file to include only files at root")), + OPT_STRING(0, "bundle-uri", &bundle_uri, + N_("uri"), N_("a URI for downloading bundles before fetching from origin remote")), + 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 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, 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 mkdir_if_missing(const char *pathname, mode_t mode) +{ + struct stat st; + + if (!mkdir(pathname, mode)) + return; + + if (errno != EEXIST) + die_errno(_("failed to create directory '%s'"), pathname); + else if (stat(pathname, &st)) + die_errno(_("failed to stat '%s'"), pathname); + else if (!S_ISDIR(st.st_mode)) + die(_("%s exists and is not a directory"), pathname); +} + +static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest, + const char *src_repo) +{ + int src_len, dest_len; + struct dir_iterator *iter; + int iter_status; + struct strbuf realpath = STRBUF_INIT; + + mkdir_if_missing(dest->buf, 0777); + + iter = dir_iterator_begin(src->buf, DIR_ITERATOR_PEDANTIC); + + if (!iter) + die_errno(_("failed to start iterator over '%s'"), src->buf); + + strbuf_addch(src, '/'); + src_len = src->len; + strbuf_addch(dest, '/'); + dest_len = dest->len; + + while ((iter_status = dir_iterator_advance(iter)) == ITER_OK) { + strbuf_setlen(src, src_len); + strbuf_addstr(src, iter->relative_path); + strbuf_setlen(dest, dest_len); + strbuf_addstr(dest, iter->relative_path); + + if (S_ISLNK(iter->st.st_mode)) + die(_("symlink '%s' exists, refusing to clone with --local"), + iter->relative_path); + + if (S_ISDIR(iter->st.st_mode)) { + mkdir_if_missing(dest->buf, 0777); + continue; + } + + /* Files that cannot be copied bit-for-bit... */ + if (!fspathcmp(iter->relative_path, "info/alternates")) { + copy_alternates(src, src_repo); + continue; + } + + if (unlink(dest->buf) && errno != ENOENT) + die_errno(_("failed to unlink '%s'"), dest->buf); + if (!option_no_hardlinks) { + strbuf_realpath(&realpath, src->buf, 1); + if (!link(realpath.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); + } + + if (iter_status != ITER_DONE) { + strbuf_setlen(src, src_len); + die(_("failed to iterate over '%s'"), src->buf); + } + + strbuf_release(&realpath); +} + +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); + 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 with 'git restore --source=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 { + int i; + for (i = 0; i < refspec->nr; i++) + get_fetch_map(remote_head, &refspec->items[i], + &tail, 0); + + /* if --branch=tag, pull the requested tag explicitly */ + get_fetch_map(remote_head, tag_refspec, &tail, 0); + } + free_refs(remote_head); + } else { + int i; + for (i = 0; i < refspec->nr; i++) + get_fetch_map(refs, &refspec->items[i], &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_with_flags(&ref->old_oid, + OBJECT_INFO_QUICK | + OBJECT_INFO_SKIP_FETCH_OBJECT)) + continue; + update_ref(msg, ref->name, &ref->old_oid, NULL, 0, + UPDATE_REFS_DIE_ON_ERR); + } +} + +static const struct object_id *iterate_ref_map(void *cb_data) +{ + 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; + if (!ref) + return NULL; + + *rm = ref->next; + return &ref->old_oid; +} + +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 *unborn, 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, remote_name, our->name); + } + } else if (our) { + struct commit *c = lookup_commit_reference(the_repository, + &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); + } else if (unborn && skip_prefix(unborn, "refs/heads/", &head)) { + /* + * Unborn head from remote; same as "our" case above except + * that we have no ref to update. + */ + if (create_symref("HEAD", unborn, NULL) < 0) + die(_("unable to update HEAD")); + if (!option_bare) + install_branch_config(0, head, remote_name, unborn); + } +} + +static int git_sparse_checkout_init(const char *repo) +{ + struct child_process cmd = CHILD_PROCESS_INIT; + int result = 0; + strvec_pushl(&cmd.args, "-C", repo, "sparse-checkout", "set", NULL); + + /* + * We must apply the setting in the current process + * for the later checkout to use the sparse-checkout file. + */ + core_apply_sparse_checkout = 1; + + cmd.git_cmd = 1; + if (run_command(&cmd)) { + error(_("failed to initialize sparse-checkout")); + result = 1; + } + + return result; +} + +static int checkout(int submodule_progress, int filter_submodules) +{ + 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")); + return 0; + } + if (!strcmp(head, "HEAD")) { + if (advice_enabled(ADVICE_DETACHED_HEAD)) + detach_advice(oid_to_hex(&oid)); + FREE_AND_NULL(head); + } else { + if (!starts_with(head, "refs/heads/")) + die(_("HEAD not found below refs/heads!")); + } + + /* We need to be in the new work tree for the checkout */ + setup_work_tree(); + + repo_hold_locked_index(the_repository, &lock_file, LOCK_DIE_ON_ERROR); + + memset(&opts, 0, sizeof opts); + opts.update = 1; + opts.merge = 1; + opts.clone = 1; + opts.preserve_ignored = 0; + opts.fn = oneway_merge; + opts.verbose_update = (option_verbosity >= 0); + opts.src_index = &the_index; + opts.dst_index = &the_index; + init_checkout_metadata(&opts.meta, head, &oid, NULL); + + tree = parse_tree_indirect(&oid); + if (!tree) + die(_("unable to parse commit %s"), oid_to_hex(&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")); + + free(head); + + if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK)) + die(_("unable to write new index file")); + + err |= run_hooks_l("post-checkout", oid_to_hex(null_oid()), + oid_to_hex(&oid), "1", NULL); + + if (!err && (option_recurse_submodules.nr > 0)) { + struct child_process cmd = CHILD_PROCESS_INIT; + strvec_pushl(&cmd.args, "submodule", "update", "--require-init", + "--recursive", NULL); + + if (option_shallow_submodules == 1) + strvec_push(&cmd.args, "--depth=1"); + + if (max_jobs != -1) + strvec_pushf(&cmd.args, "--jobs=%d", max_jobs); + + if (submodule_progress) + strvec_push(&cmd.args, "--progress"); + + if (option_verbosity < 0) + strvec_push(&cmd.args, "--quiet"); + + if (option_remote_submodules) { + strvec_push(&cmd.args, "--remote"); + strvec_push(&cmd.args, "--no-fetch"); + } + + if (filter_submodules && filter_options.choice) + strvec_pushf(&cmd.args, "--filter=%s", + expand_list_objects_filter_spec(&filter_options)); + + if (option_single_branch >= 0) + strvec_push(&cmd.args, option_single_branch ? + "--single-branch" : + "--no-single-branch"); + + cmd.git_cmd = 1; + err = run_command(&cmd); + } + + return err; +} + +static int git_clone_config(const char *k, const char *v, void *cb) +{ + if (!strcmp(k, "clone.defaultremotename")) { + free(remote_name); + remote_name = xstrdup(v); + } + if (!strcmp(k, "clone.rejectshallow")) + config_reject_shallow = git_config_bool(k, v); + if (!strcmp(k, "clone.filtersubmodules")) + config_filter_submodules = git_config_bool(k, v); + + return git_default_config(k, v, cb); +} + +static int write_one_config(const char *key, const char *value, void *data) +{ + /* + * give git_clone_config a chance to write config values back to the + * environment, since git_config_set_multivar_gently only deals with + * config-file writes + */ + int apply_failed = git_clone_config(key, value, data); + if (apply_failed) + return apply_failed; + + 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)) + 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", remote_name); + git_config_set_multivar(key.buf, value.buf, "^$", 0); + strbuf_reset(&key); + + if (option_mirror) { + strbuf_addf(&key, "remote.%s.mirror", remote_name); + git_config_set(key.buf, "true"); + strbuf_reset(&key); + } + } + } + + strbuf_release(&key); + strbuf_release(&value); +} + +static void dissociate_from_references(void) +{ + char *alternates = git_pathdup("objects/info/alternates"); + + if (!access(alternates, F_OK)) { + struct child_process cmd = CHILD_PROCESS_INIT; + + cmd.git_cmd = 1; + cmd.no_stdin = 1; + strvec_pushl(&cmd.args, "repack", "-a", "-d", NULL); + if (run_command(&cmd)) + die(_("cannot repack to clean up")); + if (unlink(alternates) && errno != ENOENT) + die_errno(_("cannot unlink temporary alternates file")); + } + free(alternates); +} + +static int path_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; + int reject_shallow = 0; + const char *repo_name, *repo, *work_tree, *git_dir; + char *path = NULL, *dir, *display_repo = NULL; + int dest_exists, real_dest_exists = 0; + const struct ref *refs, *remote_head; + struct ref *remote_head_points_at = NULL; + const struct ref *our_head_points_at; + char *unborn_head = NULL; + struct ref *mapped_refs = NULL; + const struct ref *ref; + struct strbuf key = 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; + int filter_submodules = 0; + + struct transport_ls_refs_options transport_ls_refs_options = + TRANSPORT_LS_REFS_OPTIONS_INIT; + + packet_trace_identity("clone"); + + git_config(git_clone_config, NULL); + + 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 (real_git_dir) + die(_("options '%s' and '%s' cannot be used together"), "--bare", "--separate-git-dir"); + option_no_checkout = 1; + } + + if (bundle_uri && deepen) + die(_("--bundle-uri is incompatible with --depth, --shallow-since, and --shallow-exclude")); + + repo_name = argv[0]; + + path = get_repo_path(repo_name, &is_bundle); + if (path) { + FREE_AND_NULL(path); + repo = absolute_pathdup(repo_name); + } else if (strchr(repo_name, ':')) { + repo = repo_name; + display_repo = transport_anonymize_url(repo); + } else + die(_("repository '%s' does not exist"), 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 = git_url_basename(repo_name, is_bundle, option_bare); + strip_dir_trailing_slashes(dir); + + dest_exists = path_exists(dir); + if (dest_exists && !is_empty_dir(dir)) + die(_("destination path '%s' already exists and is not " + "an empty directory."), dir); + + if (real_git_dir) { + real_dest_exists = path_exists(real_git_dir); + if (real_dest_exists && !is_empty_dir(real_git_dir)) + die(_("repository path '%s' already exists and is not " + "an empty directory."), real_git_dir); + } + + + strbuf_addf(&reflog_msg, "clone: from %s", + display_repo ? display_repo : repo); + free(display_repo); + + if (option_bare) + work_tree = NULL; + else { + work_tree = getenv("GIT_WORK_TREE"); + if (work_tree && path_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 (real_dest_exists) + 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; + int val; + + /* 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 (!git_config_get_bool("submodule.stickyRecursiveClone", &val) && + val) + string_list_append(&option_config, "submodule.recurse=true"); + + 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, GIT_HASH_UNKNOWN, NULL, + INIT_DB_QUIET); + + if (real_git_dir) { + free((char *)git_dir); + git_dir = real_git_dir; + } + + /* + * additional config can be injected with -c, make sure it's included + * after init_db, which clears the entire config environment. + */ + write_config(&option_config); + + /* + * re-read config after init_db and write_config to pick up any config + * injected by --template and --config, respectively. + */ + git_config(git_clone_config, NULL); + + /* + * If option_reject_shallow is specified from CLI option, + * ignore config_reject_shallow from git_clone_config. + */ + if (config_reject_shallow != -1) + reject_shallow = config_reject_shallow; + if (option_reject_shallow != -1) + reject_shallow = option_reject_shallow; + + /* + * If option_filter_submodules is specified from CLI option, + * ignore config_filter_submodules from git_clone_config. + */ + if (config_filter_submodules != -1) + filter_submodules = config_filter_submodules; + if (option_filter_submodules != -1) + filter_submodules = option_filter_submodules; + + /* + * Exit if the user seems to be doing something silly with submodule + * filter flags (but not with filter configs, as those should be + * set-and-forget). + */ + if (option_filter_submodules > 0 && !filter_options.choice) + die(_("the option '%s' requires '%s'"), + "--also-filter-submodules", "--filter"); + if (option_filter_submodules > 0 && !option_recurse_submodules.nr) + die(_("the option '%s' requires '%s'"), + "--also-filter-submodules", "--recurse-submodules"); + + /* + * apply the remote name provided by --origin only after this second + * call to git_config, to ensure it overrides all config-based values. + */ + if (option_origin) { + free(remote_name); + remote_name = xstrdup(option_origin); + } + + if (!remote_name) + remote_name = xstrdup("origin"); + + if (!valid_remote_name(remote_name)) + die(_("'%s' is not a valid remote name"), remote_name); + + 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/", remote_name); + } + + strbuf_addf(&key, "remote.%s.url", remote_name); + git_config_set(key.buf, repo); + strbuf_reset(&key); + + if (option_no_tags) { + strbuf_addf(&key, "remote.%s.tagOpt", remote_name); + git_config_set(key.buf, "--no-tags"); + strbuf_reset(&key); + } + + if (option_required_reference.nr || option_optional_reference.nr) + setup_reference(); + + if (option_sparse_checkout && git_sparse_checkout_init(dir)) + return 1; + + remote = remote_get(remote_name); + + refspec_appendf(&remote->fetch, "+%s*:%s*", src_ref_prefix, + branch_top.buf); + + 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 (reject_shallow) + die(_("source repository is shallow, reject to clone.")); + 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 = transport_get(remote, path ? path : remote->url[0]); + transport_set_verbosity(transport, option_verbosity, option_progress); + transport->family = family; + transport->cloning = 1; + + if (is_bundle) { + struct bundle_header header = BUNDLE_HEADER_INIT; + int fd = read_bundle_header(path, &header); + int has_filter = header.filter.choice != LOFC_DISABLED; + + if (fd > 0) + close(fd); + bundle_header_release(&header); + if (has_filter) + die(_("cannot clone from filtered bundle")); + } + + transport_set_option(transport, TRANS_OPT_KEEP, "yes"); + + if (reject_shallow) + transport_set_option(transport, TRANS_OPT_REJECT_SHALLOW, "1"); + 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 (server_options.nr) + transport->server_options = &server_options; + + if (filter_options.choice) { + const char *spec = + expand_list_objects_filter_spec(&filter_options); + transport_set_option(transport, TRANS_OPT_LIST_OBJECTS_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; + + /* + * Before fetching from the remote, download and install bundle + * data from the --bundle-uri option. + */ + if (bundle_uri) { + /* At this point, we need the_repository to match the cloned repo. */ + if (repo_init(the_repository, git_dir, work_tree)) + warning(_("failed to initialize the repo, skipping bundle URI")); + else if (fetch_bundle_uri(the_repository, bundle_uri)) + warning(_("failed to fetch objects from bundle URI '%s'"), + bundle_uri); + } + + strvec_push(&transport_ls_refs_options.ref_prefixes, "HEAD"); + refspec_ref_prefixes(&remote->fetch, + &transport_ls_refs_options.ref_prefixes); + if (option_branch) + expand_ref_prefix(&transport_ls_refs_options.ref_prefixes, + option_branch); + if (!option_no_tags) + strvec_push(&transport_ls_refs_options.ref_prefixes, + "refs/tags/"); + + refs = transport_get_remote_refs(transport, &transport_ls_refs_options); + + if (refs) + mapped_refs = wanted_peer_refs(refs, &remote->fetch); + + if (mapped_refs) { + int hash_algo = hash_algo_by_ptr(transport_get_hash_algo(transport)); + + /* + * Now that we know what algorithm the remote side is using, + * let's set ours to the same thing. + */ + initialize_repository_version(hash_algo, 1); + repo_set_hash_algo(the_repository, hash_algo); + /* + * 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) { + if (transport_fetch_refs(transport, mapped_refs)) + die(_("remote transport reported error")); + } + } + + 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, remote_name); + } else if (remote_head_points_at) { + our_head_points_at = remote_head_points_at; + } else if (remote_head) { + our_head_points_at = NULL; + } else { + const char *branch; + + if (!mapped_refs) { + warning(_("You appear to have cloned an empty repository.")); + option_no_checkout = 1; + } + + if (transport_ls_refs_options.unborn_head_target && + skip_prefix(transport_ls_refs_options.unborn_head_target, + "refs/heads/", &branch)) { + unborn_head = xstrdup(transport_ls_refs_options.unborn_head_target); + } else { + branch = git_default_branch_name(0); + unborn_head = xstrfmt("refs/heads/%s", branch); + } + + /* + * We may have selected a local default branch name "foo", + * and even though the remote's HEAD does not point there, + * it may still have a "foo" branch. If so, set it up so + * that we can follow the usual checkout code later. + * + * Note that for an empty repo we'll already have set + * option_no_checkout above, which would work against us here. + * But for an empty repo, find_remote_branch() can never find + * a match. + */ + our_head_points_at = find_remote_branch(mapped_refs, branch); + } + + write_refspec_config(src_ref_prefix, our_head_points_at, + remote_head_points_at, &branch_top); + + if (filter_options.choice) + partial_clone_register(remote_name, &filter_options); + + if (is_local) + clone_local(path, git_dir); + else if (mapped_refs && complete_refs_before_fetch) { + if (transport_fetch_refs(transport, mapped_refs)) + die(_("remote transport reported error")); + } + + update_remote_refs(refs, mapped_refs, remote_head_points_at, + branch_top.buf, reflog_msg.buf, transport, + !is_local); + + update_head(our_head_points_at, remote_head, unborn_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, 0); + transport_disconnect(transport); + + if (option_dissociate) { + close_object_store(the_repository->objects); + dissociate_from_references(); + } + + junk_mode = JUNK_LEAVE_REPO; + err = checkout(submodule_progress, filter_submodules); + + free(remote_name); + strbuf_release(&reflog_msg); + strbuf_release(&branch_top); + strbuf_release(&key); + free_refs(mapped_refs); + free_refs(remote_head_points_at); + free(unborn_head); + free(dir); + free(path); + UNLEAK(repo); + junk_mode = JUNK_LEAVE_ALL; + + transport_ls_refs_options_release(&transport_ls_refs_options); + return err; +} |