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clone.c
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/*
* Builtin "git clone"
*
* Copyright (c) 2007 Kristian Høgsberg <[email protected]>,
* 2008 Daniel Barkalow <[email protected]>
* 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 "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 "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 "object-store.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 {
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);
}
} 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(&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(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);
}
}
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.clone = 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))
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;
struct strbuf default_refspec = 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 argv_array ref_prefixes = ARGV_ARRAY_INIT;
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);
}