/* * We cannot decide in this function whether we are in the work tree or * not, since the config can only be read _after_ this function was called. */ const char *setup_git_directory_gently(int *nongit_ok) { const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); static char cwd[PATH_MAX+1]; const char *gitdirenv; const char *gitfile_dir; int len, offset, ceil_offset; /* * Let's assume that we are in a git repository. * If it turns out later that we are somewhere else, the value will be * updated accordingly. */ if (nongit_ok) *nongit_ok = 0; /* * If GIT_DIR is set explicitly, we're not going * to do any discovery, but we still do repository * validation. */ gitdirenv = getenv(GIT_DIR_ENVIRONMENT); if (gitdirenv) { if (PATH_MAX - 40 < strlen(gitdirenv)) die("'$%s' too big", GIT_DIR_ENVIRONMENT); if (is_git_directory(gitdirenv)) { static char buffer[1024 + 1]; const char *retval; if (!work_tree_env) { retval = set_work_tree(gitdirenv); /* config may override worktree */ if (check_repository_format_gently(nongit_ok)) return NULL; return retval; } if (check_repository_format_gently(nongit_ok)) return NULL; retval = get_relative_cwd(buffer, sizeof(buffer) - 1, get_git_work_tree()); if (!retval || !*retval) return NULL; set_git_dir(make_absolute_path(gitdirenv)); if (chdir(work_tree_env) < 0) die ("Could not chdir to %s", work_tree_env); strcat(buffer, "/"); return retval; } if (nongit_ok) { *nongit_ok = 1; return NULL; } die("Not a git repository: '%s'", gitdirenv); } if (!getcwd(cwd, sizeof(cwd)-1)) die("Unable to read current working directory"); ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs); if (ceil_offset < 0 && has_dos_drive_prefix(cwd)) ceil_offset = 1; /* * Test in the following order (relative to the cwd): * - .git (file containing "gitdir: <path>") * - .git/ * - ./ (bare) * - ../.git * - ../.git/ * - ../ (bare) * - ../../.git/ * etc. */ offset = len = strlen(cwd); for (;;) { gitfile_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT); if (gitfile_dir) { if (set_git_dir(gitfile_dir)) die("Repository setup failed"); break; } if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) break; if (is_git_directory(".")) { inside_git_dir = 1; if (!work_tree_env) inside_work_tree = 0; setenv(GIT_DIR_ENVIRONMENT, ".", 1); check_repository_format_gently(nongit_ok); return NULL; } while (--offset > ceil_offset && cwd[offset] != '/'); if (offset <= ceil_offset) { if (nongit_ok) { if (chdir(cwd)) die("Cannot come back to cwd"); *nongit_ok = 1; return NULL; } die("Not a git repository"); } chdir(".."); } inside_git_dir = 0; if (!work_tree_env) inside_work_tree = 1; git_work_tree_cfg = xstrndup(cwd, offset); if (check_repository_format_gently(nongit_ok)) return NULL; if (offset == len) return NULL; /* Make "offset" point to past the '/', and add a '/' at the end */ offset++; cwd[len++] = '/'; cwd[len] = 0; return cwd + offset; }
int cmd_clone(int argc, const char **argv, const char *prefix) { int use_local_hardlinks = 1; int use_separate_remote = 1; int is_bundle = 0; struct stat buf; const char *repo_name, *repo, *work_tree, *git_dir; char *path, *dir; const struct ref *refs, *head_points_at, *remote_head, *mapped_refs; char branch_top[256], key[256], value[256]; struct strbuf reflog_msg = STRBUF_INIT; struct transport *transport = NULL; char *src_ref_prefix = "refs/heads/"; struct refspec refspec; junk_pid = getpid(); argc = parse_options(argc, argv, builtin_clone_options, builtin_clone_usage, 0); if (argc == 0) die("You must specify a repository to clone."); if (option_no_hardlinks) use_local_hardlinks = 0; if (option_mirror) option_bare = 1; if (option_bare) { if (option_origin) die("--bare and --origin %s options are incompatible.", option_origin); option_no_checkout = 1; use_separate_remote = 0; } if (!option_origin) option_origin = "origin"; repo_name = argv[0]; path = get_repo_path(repo_name, &is_bundle); if (path) repo = xstrdup(make_nonrelative_path(repo_name)); else if (!strchr(repo_name, ':')) repo = xstrdup(make_absolute_path(repo_name)); else repo = repo_name; if (argc == 2) dir = xstrdup(argv[1]); else dir = guess_dir_name(repo_name, is_bundle, option_bare); strip_trailing_slashes(dir); if (!stat(dir, &buf)) die("destination directory '%s' already exists.", 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 = xstrdup(mkpath("%s/.git", dir)); } if (!option_bare) { junk_work_tree = work_tree; if (safe_create_leading_directories_const(work_tree) < 0) die("could not create leading directories of '%s': %s", work_tree, strerror(errno)); if (mkdir(work_tree, 0755)) die("could not create work tree dir '%s': %s.", work_tree, strerror(errno)); set_git_work_tree(work_tree); } junk_git_dir = git_dir; atexit(remove_junk); signal(SIGINT, remove_junk_on_signal); setenv(CONFIG_ENVIRONMENT, xstrdup(mkpath("%s/config", git_dir)), 1); if (safe_create_leading_directories_const(git_dir) < 0) die("could not create leading directories of '%s'", git_dir); set_git_dir(make_absolute_path(git_dir)); init_db(option_template, option_quiet ? INIT_DB_QUIET : 0); /* * 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); if (option_reference) setup_reference(git_dir); git_config(git_default_config, NULL); if (option_bare) { if (option_mirror) src_ref_prefix = "refs/"; strcpy(branch_top, src_ref_prefix); git_config_set("core.bare", "true"); } else { snprintf(branch_top, sizeof(branch_top), "refs/remotes/%s/", option_origin); } if (option_mirror || !option_bare) { /* Configure the remote */ if (option_mirror) { snprintf(key, sizeof(key), "remote.%s.mirror", option_origin); git_config_set(key, "true"); } snprintf(key, sizeof(key), "remote.%s.url", option_origin); git_config_set(key, repo); snprintf(key, sizeof(key), "remote.%s.fetch", option_origin); snprintf(value, sizeof(value), "+%s*:%s*", src_ref_prefix, branch_top); git_config_set_multivar(key, value, "^$", 0); } refspec.force = 0; refspec.pattern = 1; refspec.src = src_ref_prefix; refspec.dst = branch_top; if (path && !is_bundle) refs = clone_local(path, git_dir); else { struct remote *remote = remote_get(argv[0]); transport = transport_get(remote, remote->url[0]); if (!transport->get_refs_list || !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_quiet) transport->verbose = -1; else if (option_verbose) transport->progress = 1; if (option_upload_pack) transport_set_option(transport, TRANS_OPT_UPLOADPACK, option_upload_pack); refs = transport_get_remote_refs(transport); transport_fetch_refs(transport, refs); } clear_extra_refs(); mapped_refs = write_remote_refs(refs, &refspec, reflog_msg.buf); head_points_at = locate_head(refs, mapped_refs, &remote_head); if (head_points_at) { /* Local default branch link */ create_symref("HEAD", head_points_at->name, NULL); if (!option_bare) { struct strbuf head_ref = STRBUF_INIT; const char *head = head_points_at->name; if (!prefixcmp(head, "refs/heads/")) head += 11; /* Set up the initial local branch */ /* Local branch initial value */ update_ref(reflog_msg.buf, "HEAD", head_points_at->old_sha1, NULL, 0, DIE_ON_ERR); strbuf_addstr(&head_ref, branch_top); strbuf_addstr(&head_ref, "HEAD"); /* Remote branch link */ create_symref(head_ref.buf, head_points_at->peer_ref->name, reflog_msg.buf); snprintf(key, sizeof(key), "branch.%s.remote", head); git_config_set(key, option_origin); snprintf(key, sizeof(key), "branch.%s.merge", head); git_config_set(key, 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); } 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); 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; /* We need to be in the new work tree for the checkout */ setup_work_tree(); fd = 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_quiet; opts.src_index = &the_index; opts.dst_index = &the_index; tree = parse_tree_indirect(remote_head->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"); } strbuf_release(&reflog_msg); junk_pid = 0; return 0; }