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-rw-r--r--builtin/clone.c1027
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diff --git a/builtin/clone.c b/builtin/clone.c
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--- /dev/null
+++ b/builtin/clone.c
@@ -0,0 +1,1027 @@
+/*
+ * Builtin "git clone"
+ *
+ * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
+ * 2008 Daniel Barkalow <barkalow@iabervon.org>
+ * Based on git-commit.sh by Junio C Hamano and Linus Torvalds
+ *
+ * Clone a repository into a different directory that does not yet exist.
+ */
+
+#include "builtin.h"
+#include "lockfile.h"
+#include "parse-options.h"
+#include "fetch-pack.h"
+#include "refs.h"
+#include "tree.h"
+#include "tree-walk.h"
+#include "unpack-trees.h"
+#include "transport.h"
+#include "strbuf.h"
+#include "dir.h"
+#include "sigchain.h"
+#include "branch.h"
+#include "remote.h"
+#include "run-command.h"
+#include "connected.h"
+
+/*
+ * 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, option_recursive;
+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 = -1;
+static struct string_list option_config;
+static struct string_list option_reference;
+static int option_dissociate;
+
+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 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")),
+ 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_STRING(0, "template", &option_template, N_("template-directory"),
+ N_("directory from which templates will be used")),
+ OPT_CALLBACK(0 , "reference", &option_reference, N_("repo"),
+ N_("reference repository"), &opt_parse_reference),
+ 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, "dissociate", &option_dissociate,
+ N_("use --reference only while cloning")),
+ 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_END()
+};
+
+static const char *argv_submodule[] = {
+ "submodule", "update", "--init", "--recursive", NULL
+};
+
+static char *get_repo_path(const char *repo, int *is_bundle)
+{
+ static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
+ static char *bundle_suffix[] = { ".bundle", "" };
+ 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))
+ continue;
+ if (S_ISDIR(st.st_mode) && is_git_directory(path)) {
+ *is_bundle = 0;
+ return xstrdup(absolute_path(path));
+ } 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);
+ 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) {
+ *is_bundle = 0;
+ return xstrdup(absolute_path(path));
+ }
+ }
+ }
+
+ 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)) {
+ *is_bundle = 1;
+ return xstrdup(absolute_path(path));
+ }
+ }
+
+ return NULL;
+}
+
+static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
+{
+ const char *end = repo + strlen(repo), *start;
+ char *dir;
+
+ /*
+ * Strip trailing spaces, slashes and /.git
+ */
+ while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
+ end--;
+ if (end - repo > 5 && is_dir_sep(end[-5]) &&
+ !strncmp(end - 4, ".git", 4)) {
+ end -= 5;
+ while (repo < 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.
+ */
+ start = end;
+ while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
+ start--;
+
+ /*
+ * 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;
+ }
+
+ 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);
+ /*
+ * 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)
+{
+ char *ref_git;
+ const char *repo;
+ struct strbuf alternate = STRBUF_INIT;
+
+ /* Beware: read_gitfile(), real_path() and mkpath() return static buffer */
+ ref_git = xstrdup(real_path(item->string));
+
+ 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 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);
+ free(ref_git);
+ return 0;
+}
+
+static void setup_reference(void)
+{
+ for_each_string_list(&option_reference, add_one_reference, NULL);
+}
+
+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 = fopen(src->buf, "r");
+ struct strbuf line = STRBUF_INIT;
+
+ while (strbuf_getline(&line, in, '\n') != EOF) {
+ char *abs_path, abs_buf[PATH_MAX];
+ 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);
+ }
+ 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;
+ strbuf_addf(&alt, "%s/objects", src_repo);
+ add_to_alternates_file(alt.buf);
+ strbuf_release(&alt);
+ } 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);
+ 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 const char *junk_git_dir;
+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, 0);
+ strbuf_reset(&sb);
+ }
+ if (junk_work_tree) {
+ strbuf_addstr(&sb, junk_work_tree);
+ remove_dir_recursively(&sb, 0);
+ strbuf_reset(&sb);
+ }
+}
+
+static void remove_junk_on_signal(int signo)
+{
+ remove_junk();
+ sigchain_pop(signo);
+ raise(signo);
+}
+
+static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
+{
+ struct ref *ref;
+ struct strbuf head = STRBUF_INIT;
+ strbuf_addstr(&head, "refs/heads/");
+ strbuf_addstr(&head, branch);
+ ref = find_ref_by_name(refs, head.buf);
+ strbuf_release(&head);
+
+ if (ref)
+ return ref;
+
+ strbuf_addstr(&head, "refs/tags/");
+ strbuf_addstr(&head, branch);
+ ref = find_ref_by_name(refs, head.buf);
+ strbuf_release(&head);
+
+ return ref;
+}
+
+static struct ref *wanted_peer_refs(const struct ref *refs,
+ struct refspec *refspec)
+{
+ struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
+ struct ref *local_refs = head;
+ struct ref **tail = head ? &head->next : &local_refs;
+
+ if (option_single_branch) {
+ struct ref *remote_head = NULL;
+
+ if (!option_branch)
+ remote_head = guess_remote_head(head, refs, 0);
+ else {
+ local_refs = NULL;
+ tail = &local_refs;
+ remote_head = copy_ref(find_remote_branch(refs, option_branch));
+ }
+
+ if (!remote_head && option_branch)
+ warning(_("Could not find remote branch %s to clone."),
+ option_branch);
+ else {
+ get_fetch_map(remote_head, refspec, &tail, 0);
+
+ /* if --branch=tag, pull the requested tag explicitly */
+ get_fetch_map(remote_head, tag_refspec, &tail, 0);
+ }
+ } else
+ get_fetch_map(refs, refspec, &tail, 0);
+
+ if (!option_mirror && !option_single_branch)
+ 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;
+
+ lock_packed_refs(LOCK_DIE_ON_ERROR);
+
+ for (r = local_refs; r; r = r->next) {
+ if (!r->peer_ref)
+ continue;
+ add_packed_ref(r->peer_ref->name, r->old_sha1);
+ }
+
+ if (commit_packed_refs())
+ die_errno("unable to overwrite old ref-pack file");
+}
+
+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_sha1_file(ref->old_sha1))
+ continue;
+ update_ref(msg, ref->name, ref->old_sha1,
+ 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_sha1);
+ *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");
+ create_symref(head_ref.buf,
+ remote_head_points_at->peer_ref->name,
+ msg);
+ }
+}
+
+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 */
+ create_symref("HEAD", our->name, NULL);
+ if (!option_bare) {
+ update_ref(msg, "HEAD", our->old_sha1, 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_sha1);
+ /* --branch specifies a non-branch (i.e. tags), detach HEAD */
+ update_ref(msg, "HEAD", c->object.sha1,
+ 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_sha1,
+ 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)
+ err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
+
+ 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);
+}
+
+static void write_config(struct string_list *config)
+{
+ int i;
+
+ for (i = 0; i < config->nr; i++) {
+ if (git_config_parse_parameter(config->items[i].string,
+ write_one_config, NULL) < 0)
+ die("unable to write parameters to config file");
+ }
+}
+
+static void write_refspec_config(const char *src_ref_prefix,
+ const struct ref *our_head_points_at,
+ const struct ref *remote_head_points_at,
+ struct strbuf *branch_top)
+{
+ struct strbuf key = STRBUF_INIT;
+ struct strbuf value = STRBUF_INIT;
+
+ if (option_mirror || !option_bare) {
+ if (option_single_branch && !option_mirror) {
+ if (option_branch) {
+ if (starts_with(our_head_points_at->name, "refs/tags/"))
+ strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
+ our_head_points_at->name);
+ else
+ strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
+ branch_top->buf, option_branch);
+ } else if (remote_head_points_at) {
+ const char *head = remote_head_points_at->name;
+ if (!skip_prefix(head, "refs/heads/", &head))
+ die("BUG: remote HEAD points at non-head?");
+
+ strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
+ branch_top->buf, head);
+ }
+ /*
+ * otherwise, the next "git fetch" will
+ * simply fetch from HEAD without updating
+ * any remote-tracking branch, which is what
+ * we want.
+ */
+ } else {
+ strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
+ }
+ /* Configure the remote */
+ if (value.len) {
+ strbuf_addf(&key, "remote.%s.fetch", option_origin);
+ git_config_set_multivar(key.buf, value.buf, "^$", 0);
+ strbuf_reset(&key);
+
+ if (option_mirror) {
+ strbuf_addf(&key, "remote.%s.mirror", option_origin);
+ git_config_set(key.buf, "true");
+ strbuf_reset(&key);
+ }
+ }
+ }
+
+ strbuf_release(&key);
+ strbuf_release(&value);
+}
+
+static void dissociate_from_references(void)
+{
+ static const char* argv[] = { "repack", "-a", "-d", NULL };
+
+ if (run_command_v_opt(argv, RUN_GIT_CMD|RUN_COMMAND_NO_STDIN))
+ die(_("cannot repack to clean up"));
+ if (unlink(git_path("objects/info/alternates")) && errno != ENOENT)
+ die_errno(_("cannot unlink temporary alternates file"));
+}
+
+int cmd_clone(int argc, const char **argv, const char *prefix)
+{
+ int is_bundle = 0, is_local;
+ struct stat buf;
+ const char *repo_name, *repo, *work_tree, *git_dir;
+ char *path, *dir;
+ int dest_exists;
+ const struct ref *refs, *remote_head;
+ const struct ref *remote_head_points_at;
+ const struct ref *our_head_points_at;
+ struct ref *mapped_refs;
+ const struct ref *ref;
+ struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
+ struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
+ struct transport *transport = NULL;
+ const char *src_ref_prefix = "refs/heads/";
+ struct remote *remote;
+ int err = 0, complete_refs_before_fetch = 1;
+
+ struct refspec *refspec;
+ const char *fetch_pattern;
+
+ 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_single_branch == -1)
+ option_single_branch = option_depth ? 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 = xstrdup(absolute_path(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 = !stat(dir, &buf);
+ 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 && !stat(work_tree, &buf))
+ 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);
+ }
+
+ 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, 0777))
+ die_errno(_("could not create work tree dir '%s'."),
+ work_tree);
+ set_git_work_tree(work_tree);
+ }
+ junk_git_dir = git_dir;
+ atexit(remove_junk);
+ sigchain_push_common(remove_junk_on_signal);
+
+ 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) {
+ git_dir = real_git_dir;
+ junk_git_dir = real_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);
+ }
+ init_db(option_template, INIT_DB_QUIET);
+ write_config(&option_config);
+
+ git_config(git_default_config, NULL);
+
+ if (option_bare) {
+ if (option_mirror)
+ src_ref_prefix = "refs/";
+ strbuf_addstr(&branch_top, src_ref_prefix);
+
+ git_config_set("core.bare", "true");
+ } else {
+ strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
+ }
+
+ strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
+ strbuf_addf(&key, "remote.%s.url", option_origin);
+ git_config_set(key.buf, repo);
+ strbuf_reset(&key);
+
+ if (option_reference.nr)
+ setup_reference();
+ else if (option_dissociate) {
+ warning(_("--dissociate given, but there is no --reference"));
+ option_dissociate = 0;
+ }
+
+ fetch_pattern = value.buf;
+ refspec = parse_fetch_refspec(1, &fetch_pattern);
+
+ strbuf_reset(&value);
+
+ remote = remote_get(option_origin);
+ transport = transport_get(remote, remote->url[0]);
+ 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 (!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 || (!is_local && !transport->fetch))
+ die(_("Don't know how to clone %s"), transport->url);
+
+ transport_set_option(transport, TRANS_OPT_KEEP, "yes");
+
+ 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 (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_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_sha1(ref->old_sha1)) {
+ complete_refs_before_fetch = 0;
+ break;
+ }
+
+ if (!is_local && !complete_refs_before_fetch)
+ transport_fetch_refs(transport, mapped_refs);
+
+ remote_head = find_ref_by_name(refs, "HEAD");
+ remote_head_points_at =
+ guess_remote_head(remote_head, mapped_refs, 0);
+
+ if (option_branch) {
+ our_head_points_at =
+ find_remote_branch(mapped_refs, option_branch);
+
+ if (!our_head_points_at)
+ die(_("Remote branch %s not found in upstream %s"),
+ option_branch, option_origin);
+ }
+ else
+ our_head_points_at = remote_head_points_at;
+ }
+ else {
+ if (option_branch)
+ die(_("Remote branch %s not found in upstream %s"),
+ option_branch, option_origin);
+
+ warning(_("You appear to have cloned an empty repository."));
+ mapped_refs = NULL;
+ our_head_points_at = NULL;
+ remote_head_points_at = NULL;
+ remote_head = NULL;
+ option_no_checkout = 1;
+ if (!option_bare)
+ install_branch_config(0, "master", option_origin,
+ "refs/heads/master");
+ }
+
+ write_refspec_config(src_ref_prefix, our_head_points_at,
+ remote_head_points_at, &branch_top);
+
+ if (is_local)
+ clone_local(path, git_dir);
+ else if (refs && complete_refs_before_fetch)
+ transport_fetch_refs(transport, mapped_refs);
+
+ update_remote_refs(refs, mapped_refs, remote_head_points_at,
+ branch_top.buf, reflog_msg.buf, transport, !is_local);
+
+ update_head(our_head_points_at, remote_head, reflog_msg.buf);
+
+ transport_unlock_pack(transport);
+ transport_disconnect(transport);
+
+ if (option_dissociate)
+ 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_mode = JUNK_LEAVE_ALL;
+
+ free(refspec);
+ return err;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 07:45:46 +0000