in builtin/clone.c [855:1320]
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;
struct ref *mapped_refs;
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;
struct transport_ls_refs_options transport_ls_refs_options =
TRANSPORT_LS_REFS_OPTIONS_INIT;
git_config(git_default_core_config, NULL);
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 (option_origin)
die(_("options '%s' and '%s %s' cannot be used together"),
"--bare", "--origin", option_origin);
if (real_git_dir)
die(_("options '%s' and '%s' cannot be used together"), "--bare", "--separate-git-dir");
option_no_checkout = 1;
}
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;
/*
* 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 != NULL)
remote_name = xstrdup(option_origin);
if (remote_name == NULL)
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);
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 (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->cloning = 1;
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;
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) {
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);
mapped_refs = wanted_peer_refs(refs, &remote->fetch);
/*
* 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
our_head_points_at = remote_head_points_at;
}
else {
const char *branch;
char *ref;
if (option_branch)
die(_("Remote branch %s not found in upstream %s"),
option_branch, remote_name);
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 (transport_ls_refs_options.unborn_head_target &&
skip_prefix(transport_ls_refs_options.unborn_head_target,
"refs/heads/", &branch)) {
ref = transport_ls_refs_options.unborn_head_target;
transport_ls_refs_options.unborn_head_target = NULL;
create_symref("HEAD", ref, reflog_msg.buf);
} else {
branch = git_default_branch_name(0);
ref = xstrfmt("refs/heads/%s", branch);
}
if (!option_bare)
install_branch_config(0, branch, remote_name, ref);
free(ref);
}
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 (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, 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);
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(dir);
free(path);
UNLEAK(repo);
junk_mode = JUNK_LEAVE_ALL;
strvec_clear(&transport_ls_refs_options.ref_prefixes);
free(transport_ls_refs_options.unborn_head_target);
return err;
}