diff options
Diffstat (limited to 'builtin/clone.c')
| -rw-r--r-- | builtin/clone.c | 895 |
1 files changed, 611 insertions, 284 deletions
diff --git a/builtin/clone.c b/builtin/clone.c index 86db954730..8f7db98af6 100644 --- a/builtin/clone.c +++ b/builtin/clone.c @@ -9,6 +9,7 @@ */ #include "builtin.h" +#include "lockfile.h" #include "parse-options.h" #include "fetch-pack.h" #include "refs.h" @@ -18,11 +19,11 @@ #include "transport.h" #include "strbuf.h" #include "dir.h" -#include "pack-refs.h" #include "sigchain.h" #include "branch.h" #include "remote.h" #include "run-command.h" +#include "connected.h" /* * Overall FIXMEs: @@ -33,164 +34,217 @@ * */ static const char * const builtin_clone_usage[] = { - "git clone [options] [--] <repo> [<dir>]", + N_("git clone [<options>] [--] <repo> [<dir>]"), NULL }; -static int option_no_checkout, option_bare, option_mirror; -static int option_local, option_no_hardlinks, option_shared, option_recursive; +static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1; +static int option_local = -1, option_no_hardlinks, option_shared, option_recursive; +static int option_shallow_submodules; static char *option_template, *option_depth; static char *option_origin = NULL; static char *option_branch = NULL; static const char *real_git_dir; static char *option_upload_pack = "git-upload-pack"; static int option_verbosity; -static int option_progress; +static int option_progress = -1; +static enum transport_family family; static struct string_list option_config; static struct string_list option_reference; - -static int opt_parse_reference(const struct option *opt, const char *arg, int unset) -{ - struct string_list *option_reference = opt->value; - if (!arg) - return -1; - string_list_append(option_reference, arg); - return 0; -} +static int option_dissociate; +static int max_jobs = -1; static struct option builtin_clone_options[] = { OPT__VERBOSITY(&option_verbosity), - OPT_BOOLEAN(0, "progress", &option_progress, - "force progress reporting"), - OPT_BOOLEAN('n', "no-checkout", &option_no_checkout, - "don't create a checkout"), - OPT_BOOLEAN(0, "bare", &option_bare, "create a bare repository"), - { OPTION_BOOLEAN, 0, "naked", &option_bare, NULL, - "create a bare repository", - PARSE_OPT_NOARG | PARSE_OPT_HIDDEN }, - OPT_BOOLEAN(0, "mirror", &option_mirror, - "create a mirror repository (implies bare)"), - OPT_BOOLEAN('l', "local", &option_local, - "to clone from a local repository"), - OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks, - "don't use local hardlinks, always copy"), - OPT_BOOLEAN('s', "shared", &option_shared, - "setup as shared repository"), - OPT_BOOLEAN(0, "recursive", &option_recursive, - "initialize submodules in the clone"), - OPT_BOOLEAN(0, "recurse-submodules", &option_recursive, - "initialize submodules in the clone"), - OPT_STRING(0, "template", &option_template, "template-directory", - "directory from which templates will be used"), - OPT_CALLBACK(0 , "reference", &option_reference, "repo", - "reference repository", &opt_parse_reference), - OPT_STRING('o', "origin", &option_origin, "name", - "use <name> instead of 'origin' to track upstream"), - OPT_STRING('b', "branch", &option_branch, "branch", - "checkout <branch> instead of the remote's HEAD"), - OPT_STRING('u', "upload-pack", &option_upload_pack, "path", - "path to git-upload-pack on the remote"), - OPT_STRING(0, "depth", &option_depth, "depth", - "create a shallow clone of that depth"), - OPT_STRING(0, "separate-git-dir", &real_git_dir, "gitdir", - "separate git dir from working tree"), - OPT_STRING_LIST('c', "config", &option_config, "key=value", - "set config inside the new repository"), + 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")), + OPT_BOOL(0, "recursive", &option_recursive, + N_("initialize submodules in the clone")), + OPT_BOOL(0, "recurse-submodules", &option_recursive, + N_("initialize submodules in the clone")), + 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_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_BOOL(0, "single-branch", &option_single_branch, + N_("clone only one branch, HEAD or --branch")), + 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_END() }; -static const char *argv_submodule[] = { - "submodule", "update", "--init", "--recursive", NULL -}; - -static char *get_repo_path(const char *repo, int *is_bundle) +static const char *get_repo_path_1(struct strbuf *path, int *is_bundle) { - static char *suffix[] = { "/.git", ".git", "" }; + 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++) { - const char *path; - path = mkpath("%s%s", repo, suffix[i]); - if (stat(path, &st)) + strbuf_setlen(path, baselen); + strbuf_addstr(path, suffix[i]); + if (stat(path->buf, &st)) continue; - if (S_ISDIR(st.st_mode)) { + if (S_ISDIR(st.st_mode) && is_git_directory(path->buf)) { *is_bundle = 0; - return xstrdup(absolute_path(path)); + return path->buf; } else if (S_ISREG(st.st_mode) && st.st_size > 8) { /* Is it a "gitfile"? */ char signature[8]; - int len, fd = open(path, O_RDONLY); + 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; - path = read_gitfile(path); - if (path) { + dst = read_gitfile(path->buf); + if (dst) { *is_bundle = 0; - return xstrdup(absolute_path(path)); + return dst; } } } for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) { - const char *path; - path = mkpath("%s%s", repo, bundle_suffix[i]); - if (!stat(path, &st) && S_ISREG(st.st_mode)) { + strbuf_setlen(path, baselen); + strbuf_addstr(path, bundle_suffix[i]); + if (!stat(path->buf, &st) && S_ISREG(st.st_mode)) { *is_bundle = 1; - return xstrdup(absolute_path(path)); + 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 ? xstrdup(absolute_path(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; + 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 (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1]))) + while (start < end && (is_dir_sep(end[-1]) || isspace(end[-1]))) end--; - if (end - repo > 5 && is_dir_sep(end[-5]) && + if (end - start > 5 && is_dir_sep(end[-5]) && !strncmp(end - 4, ".git", 4)) { end -= 5; - while (repo < end && is_dir_sep(end[-1])) + while (start < end && is_dir_sep(end[-1])) end--; } /* - * Find last component, but be prepared that repo could have - * the form "remote.example.com:foo.git", i.e. no slash - * in the directory part. + * 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. */ - start = end; - while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':') - start--; + 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}. */ - if (is_bundle) { - if (end - start > 7 && !strncmp(end - 7, ".bundle", 7)) - end -= 7; - } else { - if (end - start > 4 && !strncmp(end - 4, ".git", 4)) - end -= 4; - } + len = end - start; + strip_suffix_mem(start, &len, is_bundle ? ".bundle" : ".git"); - if (is_bare) { - struct strbuf result = STRBUF_INIT; - strbuf_addf(&result, "%.*s.git", (int)(end - start), start); - dir = strbuf_detach(&result, NULL); - } else - dir = xstrndup(start, end - start); + 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. @@ -229,32 +283,42 @@ static void strip_trailing_slashes(char *dir) static int add_one_reference(struct string_list_item *item, void *cb_data) { char *ref_git; + const char *repo; struct strbuf alternate = STRBUF_INIT; - struct remote *remote; - struct transport *transport; - const struct ref *extra; - /* Beware: real_path() and mkpath() return static buffer */ + /* Beware: read_gitfile(), real_path() and mkpath() return static buffer */ ref_git = xstrdup(real_path(item->string)); - if (is_directory(mkpath("%s/.git/objects", ref_git))) { - char *ref_git_git = xstrdup(mkpath("%s/.git", ref_git)); + + repo = read_gitfile(ref_git); + if (!repo) + repo = read_gitfile(mkpath("%s/.git", ref_git)); + if (repo) { + free(ref_git); + ref_git = xstrdup(repo); + } + + if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) { + char *ref_git_git = mkpathdup("%s/.git", ref_git); free(ref_git); ref_git = ref_git_git; - } else if (!is_directory(mkpath("%s/objects", ref_git))) - die(_("reference repository '%s' is not a local directory."), + } else if (!is_directory(mkpath("%s/objects", ref_git))) { + struct strbuf sb = STRBUF_INIT; + if (get_common_dir(&sb, ref_git)) + die(_("reference repository '%s' as a linked checkout is not supported yet."), + item->string); + die(_("reference repository '%s' is not a local repository."), item->string); + } + + if (!access(mkpath("%s/shallow", ref_git), F_OK)) + die(_("reference repository '%s' is shallow"), item->string); + + if (!access(mkpath("%s/info/grafts", ref_git), F_OK)) + die(_("reference repository '%s' is grafted"), item->string); strbuf_addf(&alternate, "%s/objects", ref_git); add_to_alternates_file(alternate.buf); strbuf_release(&alternate); - - remote = remote_get(ref_git); - transport = transport_get(remote, ref_git); - for (extra = transport_get_remote_refs(transport); extra; - extra = extra->next) - add_extra_ref(extra->name, extra->old_sha1, 0); - - transport_disconnect(transport); free(ref_git); return 0; } @@ -282,17 +346,18 @@ static void copy_alternates(struct strbuf *src, struct strbuf *dst, FILE *in = fopen(src->buf, "r"); struct strbuf line = STRBUF_INIT; - while (strbuf_getline(&line, in, '\n') != EOF) { - char *abs_path, abs_buf[PATH_MAX]; + 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 = mkpath("%s/objects/%s", src_repo, line.buf); - normalize_path_copy(abs_buf, abs_path); - add_to_alternates_file(abs_buf); + abs_path = mkpathdup("%s/objects/%s", src_repo, line.buf); + normalize_path_copy(abs_path, abs_path); + add_to_alternates_file(abs_path); + free(abs_path); } strbuf_release(&line); fclose(in); @@ -351,7 +416,7 @@ static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest, if (!option_no_hardlinks) { if (!link(src->buf, dest->buf)) continue; - if (option_local) + if (option_local > 0) die_errno(_("failed to create link '%s'"), dest->buf); option_no_hardlinks = 1; } @@ -361,13 +426,8 @@ static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest, closedir(dir); } -static const struct ref *clone_local(const char *src_repo, - const char *dest_repo) +static void clone_local(const char *src_repo, const char *dest_repo) { - const struct ref *ret; - struct remote *remote; - struct transport *transport; - if (option_shared) { struct strbuf alt = STRBUF_INIT; strbuf_addf(&alt, "%s/objects", src_repo); @@ -376,31 +436,47 @@ static const struct ref *clone_local(const char *src_repo, } else { struct strbuf src = STRBUF_INIT; struct strbuf dest = STRBUF_INIT; - strbuf_addf(&src, "%s/objects", src_repo); - strbuf_addf(&dest, "%s/objects", dest_repo); + 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); } - remote = remote_get(src_repo); - transport = transport_get(remote, src_repo); - ret = transport_get_remote_refs(transport); - transport_disconnect(transport); if (0 <= option_verbosity) - printf(_("done.\n")); - return ret; + fprintf(stderr, _("done.\n")); } static const char *junk_work_tree; static const char *junk_git_dir; -static pid_t junk_pid; +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; - if (getpid() != junk_pid) + + 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, 0); @@ -420,6 +496,26 @@ static void remove_junk_on_signal(int 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) { @@ -427,8 +523,30 @@ static struct ref *wanted_peer_refs(const struct ref *refs, struct ref *local_refs = head; struct ref **tail = head ? &head->next : &local_refs; - get_fetch_map(refs, refspec, &tail, 0); - if (!option_mirror) + 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) get_fetch_map(refs, tag_refspec, &tail, 0); return local_refs; @@ -438,19 +556,204 @@ 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; - add_extra_ref(r->peer_ref->name, r->old_sha1, 0); + if (ref_transaction_create(t, r->peer_ref->name, r->old_oid.hash, + 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.hash, + NULL, 0, UPDATE_REFS_DIE_ON_ERR); + } +} + +static int iterate_ref_map(void *cb_data, unsigned char sha1[20]) +{ + 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; + + hashcpy(sha1, ref->old_oid.hash); + *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) { + if (transport->progress) + fprintf(stderr, _("Checking connectivity... ")); + if (check_everything_connected_with_transport(iterate_ref_map, + 0, &rm, transport)) + die(_("remote did not send all necessary objects")); + if (transport->progress) + fprintf(stderr, _("done.\n")); + } + + if (refs) { + write_remote_refs(mapped_refs); + if (option_single_branch) + 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.hash, 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.hash); + /* --branch specifies a non-branch (i.e. tags), detach HEAD */ + update_ref(msg, "HEAD", c->object.oid.hash, + NULL, REF_NODEREF, 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.hash, + NULL, REF_NODEREF, UPDATE_REFS_DIE_ON_ERR); + } +} + +static int checkout(void) +{ + unsigned char sha1[20]; + char *head; + struct lock_file *lock_file; + 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, sha1, 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(sha1_to_hex(sha1)); + } 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(); + + lock_file = xcalloc(1, sizeof(struct lock_file)); + hold_locked_index(lock_file, 1); + + 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(sha1); + 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), + sha1_to_hex(sha1), "1", NULL); + + if (!err && option_recursive) { + 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); + + err = run_command_v_opt(args.argv, RUN_GIT_CMD); + argv_array_clear(&args); } - pack_refs(PACK_REFS_ALL); - clear_extra_refs(); + return err; } static int write_one_config(const char *key, const char *value, void *data) { - return git_config_set_multivar(key, value ? value : "true", "^$", 0); + return git_config_set_multivar_gently(key, value ? value : "true", "^$", 0); } static void write_config(struct string_list *config) @@ -460,10 +763,76 @@ static void write_config(struct string_list *config) 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"); + 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); +} + int cmd_clone(int argc, const char **argv, const char *prefix) { int is_bundle = 0, is_local; @@ -475,17 +844,17 @@ int cmd_clone(int argc, const char **argv, const char *prefix) 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; - char *src_ref_prefix = "refs/heads/"; - int err = 0; + const char *src_ref_prefix = "refs/heads/"; + struct remote *remote; + int err = 0, complete_refs_before_fetch = 1; struct refspec *refspec; const char *fetch_pattern; - junk_pid = getpid(); - packet_trace_identity("clone"); argc = parse_options(argc, argv, prefix, builtin_clone_options, builtin_clone_usage, 0); @@ -498,6 +867,9 @@ int cmd_clone(int argc, const char **argv, const char *prefix) usage_msg_opt(_("You must specify a repository to clone."), builtin_clone_usage, builtin_clone_options); + if (option_single_branch == -1) + option_single_branch = option_depth ? 1 : 0; + if (option_mirror) option_bare = 1; @@ -505,6 +877,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix) 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; } @@ -520,9 +894,10 @@ int cmd_clone(int argc, const char **argv, const char *prefix) die(_("repository '%s' does not exist"), repo_name); else repo = repo_name; - is_local = path && !is_bundle; - if (is_local && option_depth) - warning(_("--depth is ignored in local clones; use file:// instead.")); + + /* 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]); @@ -549,48 +924,42 @@ int cmd_clone(int argc, const char **argv, const char *prefix) git_dir = xstrdup(dir); else { work_tree = dir; - git_dir = xstrdup(mkpath("%s/.git", dir)); + git_dir = mkpathdup("%s/.git", dir); } + atexit(remove_junk); + sigchain_push_common(remove_junk_on_signal); + if (!option_bare) { - junk_work_tree = work_tree; if (safe_create_leading_directories_const(work_tree) < 0) die_errno(_("could not create leading directories of '%s'"), work_tree); - if (!dest_exists && mkdir(work_tree, 0755)) - die_errno(_("could not create work tree dir '%s'."), + if (!dest_exists && 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); } - junk_git_dir = git_dir; - atexit(remove_junk); - sigchain_push_common(remove_junk_on_signal); - - setenv(CONFIG_ENVIRONMENT, mkpath("%s/config", git_dir), 1); + junk_git_dir = git_dir; if (safe_create_leading_directories_const(git_dir) < 0) die(_("could not create leading directories of '%s'"), git_dir); set_git_dir_init(git_dir, real_git_dir, 0); - if (real_git_dir) + if (real_git_dir) { git_dir = real_git_dir; + junk_git_dir = real_git_dir; + } if (0 <= option_verbosity) { if (option_bare) - printf(_("Cloning into bare repository '%s'...\n"), dir); + fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir); else - printf(_("Cloning into '%s'...\n"), dir); + fprintf(stderr, _("Cloning into '%s'...\n"), dir); } init_db(option_template, INIT_DB_QUIET); write_config(&option_config); - /* - * At this point, the config exists, so we do not need the - * environment variable. We actually need to unset it, too, to - * re-enable parsing of the global configs. - */ - unsetenv(CONFIG_ENVIRONMENT); - git_config(git_default_config, NULL); if (option_bare) { @@ -604,20 +973,6 @@ int cmd_clone(int argc, const char **argv, const char *prefix) } strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf); - - if (option_mirror || !option_bare) { - /* Configure the remote */ - 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_addf(&key, "remote.%s.url", option_origin); git_config_set(key.buf, repo); strbuf_reset(&key); @@ -630,64 +985,89 @@ int cmd_clone(int argc, const char **argv, const char *prefix) 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) { - refs = clone_local(path, git_dir); - mapped_refs = wanted_peer_refs(refs, refspec); - } else { - struct remote *remote = remote_get(option_origin); - transport = transport_get(remote, remote->url[0]); + if (option_depth) + warning(_("--depth 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; - if (!transport->get_refs_list || !transport->fetch) - die(_("Don't know how to clone %s"), transport->url); + if (!transport->get_refs_list || (!is_local && !transport->fetch)) + die(_("Don't know how to clone %s"), transport->url); - transport_set_option(transport, TRANS_OPT_KEEP, "yes"); + transport_set_option(transport, TRANS_OPT_KEEP, "yes"); - if (option_depth) - transport_set_option(transport, TRANS_OPT_DEPTH, - option_depth); + if (option_depth) + transport_set_option(transport, TRANS_OPT_DEPTH, + option_depth); + if (option_single_branch) + transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1"); - transport_set_verbosity(transport, option_verbosity, option_progress); + if (option_upload_pack) + transport_set_option(transport, TRANS_OPT_UPLOADPACK, + option_upload_pack); - if (option_upload_pack) - transport_set_option(transport, TRANS_OPT_UPLOADPACK, - option_upload_pack); + if (transport->smart_options && !option_depth) + 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_fetch_refs(transport, mapped_refs); - } - } + refs = transport_get_remote_refs(transport); if (refs) { - clear_extra_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; + } - write_remote_refs(mapped_refs); + 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) { - struct strbuf head = STRBUF_INIT; - strbuf_addstr(&head, src_ref_prefix); - strbuf_addstr(&head, option_branch); our_head_points_at = - find_ref_by_name(mapped_refs, head.buf); - strbuf_release(&head); + find_remote_branch(mapped_refs, option_branch); - if (!our_head_points_at) { - warning(_("Remote branch %s not found in " - "upstream %s, using HEAD instead"), - option_branch, option_origin); - our_head_points_at = remote_head_points_at; - } + 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; @@ -697,89 +1077,36 @@ int cmd_clone(int argc, const char **argv, const char *prefix) "refs/heads/master"); } - if (remote_head_points_at && !option_bare) { - struct strbuf head_ref = STRBUF_INIT; - strbuf_addstr(&head_ref, branch_top.buf); - strbuf_addstr(&head_ref, "HEAD"); - create_symref(head_ref.buf, - remote_head_points_at->peer_ref->name, - reflog_msg.buf); - } + write_refspec_config(src_ref_prefix, our_head_points_at, + remote_head_points_at, &branch_top); - if (our_head_points_at) { - /* Local default branch link */ - create_symref("HEAD", our_head_points_at->name, NULL); - if (!option_bare) { - const char *head = skip_prefix(our_head_points_at->name, - "refs/heads/"); - update_ref(reflog_msg.buf, "HEAD", - our_head_points_at->old_sha1, - NULL, 0, DIE_ON_ERR); - install_branch_config(0, head, option_origin, - our_head_points_at->name); - } - } else if (remote_head) { - /* Source had detached HEAD pointing somewhere. */ - if (!option_bare) { - update_ref(reflog_msg.buf, "HEAD", - remote_head->old_sha1, - NULL, REF_NODEREF, DIE_ON_ERR); - our_head_points_at = remote_head; - } - } else { - /* Nothing to checkout out */ - if (!option_no_checkout) - warning(_("remote HEAD refers to nonexistent ref, " - "unable to checkout.\n")); - option_no_checkout = 1; - } - - if (transport) { - transport_unlock_pack(transport); - transport_disconnect(transport); - } - - if (!option_no_checkout) { - struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file)); - struct unpack_trees_options opts; - struct tree *tree; - struct tree_desc t; - int fd; + if (is_local) + clone_local(path, git_dir); + else if (refs && complete_refs_before_fetch) + transport_fetch_refs(transport, mapped_refs); - /* We need to be in the new work tree for the checkout */ - setup_work_tree(); + update_remote_refs(refs, mapped_refs, remote_head_points_at, + branch_top.buf, reflog_msg.buf, transport, !is_local); - fd = hold_locked_index(lock_file, 1); + update_head(our_head_points_at, remote_head, reflog_msg.buf); - 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(our_head_points_at->old_sha1); - parse_tree(tree); - init_tree_desc(&t, tree->buffer, tree->size); - unpack_trees(1, &t, &opts); - - if (write_cache(fd, active_cache, active_nr) || - commit_locked_index(lock_file)) - die(_("unable to write new index file")); - - err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1), - sha1_to_hex(our_head_points_at->old_sha1), "1", - NULL); + transport_unlock_pack(transport); + transport_disconnect(transport); - if (!err && option_recursive) - err = run_command_v_opt(argv_submodule, RUN_GIT_CMD); + if (option_dissociate) { + close_all_packs(); + dissociate_from_references(); } + junk_mode = JUNK_LEAVE_REPO; + err = checkout(); + strbuf_release(&reflog_msg); strbuf_release(&branch_top); strbuf_release(&key); strbuf_release(&value); - junk_pid = 0; + junk_mode = JUNK_LEAVE_ALL; + + free(refspec); return err; } |