static int handle_config(const char *key, const char *value, void *cb)
{
	const char *name;
	const char *subkey;
	struct remote *remote;
	struct branch *branch;
	if (!prefixcmp(key, "branch.")) {
		name = key + 7;
		subkey = strrchr(name, '.');
		if (!subkey)
			return 0;
		branch = make_branch(name, subkey - name);
		if (!strcmp(subkey, ".remote")) {
			if (!value)
				return config_error_nonbool(key);
			branch->remote_name = xstrdup(value);
			if (branch == current_branch)
				default_remote_name = branch->remote_name;
		} else if (!strcmp(subkey, ".merge")) {
			if (!value)
				return config_error_nonbool(key);
			add_merge(branch, xstrdup(value));
		}
		return 0;
	}
	if (!prefixcmp(key, "url.")) {
		struct rewrite *rewrite;
		name = key + 4;
		subkey = strrchr(name, '.');
		if (!subkey)
			return 0;
		rewrite = make_rewrite(name, subkey - name);
		if (!strcmp(subkey, ".insteadof")) {
			if (!value)
				return config_error_nonbool(key);
			add_instead_of(rewrite, xstrdup(value));
		}
	}
	if (prefixcmp(key,  "remote."))
		return 0;
	name = key + 7;
	if (*name == '/') {
		warning("Config remote shorthand cannot begin with '/': %s",
			name);
		return 0;
	}
	subkey = strrchr(name, '.');
	if (!subkey)
		return error("Config with no key for remote %s", name);
	remote = make_remote(name, subkey - name);
	remote->origin = REMOTE_CONFIG;
	if (!strcmp(subkey, ".mirror"))
		remote->mirror = git_config_bool(key, value);
	else if (!strcmp(subkey, ".skipdefaultupdate"))
		remote->skip_default_update = git_config_bool(key, value);

	else if (!strcmp(subkey, ".url")) {
		const char *v;
		if (git_config_string(&v, key, value))
			return -1;
		add_url(remote, v);
	} else if (!strcmp(subkey, ".push")) {
		const char *v;
		if (git_config_string(&v, key, value))
			return -1;
		add_push_refspec(remote, v);
	} else if (!strcmp(subkey, ".fetch")) {
		const char *v;
		if (git_config_string(&v, key, value))
			return -1;
		add_fetch_refspec(remote, v);
	} else if (!strcmp(subkey, ".receivepack")) {
		const char *v;
		if (git_config_string(&v, key, value))
			return -1;
		if (!remote->receivepack)
			remote->receivepack = v;
		else
			error("more than one receivepack given, using the first");
	} else if (!strcmp(subkey, ".uploadpack")) {
		const char *v;
		if (git_config_string(&v, key, value))
			return -1;
		if (!remote->uploadpack)
			remote->uploadpack = v;
		else
			error("more than one uploadpack given, using the first");
	} else if (!strcmp(subkey, ".tagopt")) {
		if (!strcmp(value, "--no-tags"))
			remote->fetch_tags = -1;
	} else if (!strcmp(subkey, ".proxy")) {
		return git_config_string((const char **)&remote->http_proxy,
					 key, value);
	}
	return 0;
}

void wt_status_print(struct wt_status *s)
{
	const char *branch_color = color(WT_STATUS_HEADER, s);

	if (s->branch) {
		const char *on_what = "On branch ";
		const char *branch_name = s->branch;
		if (!prefixcmp(branch_name, "refs/heads/"))
			branch_name += 11;
		else if (!strcmp(branch_name, "HEAD")) {
			branch_name = "";
			branch_color = color(WT_STATUS_NOBRANCH, s);
			on_what = "Not currently on any branch.";
		}
		color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "# ");
		color_fprintf_ln(s->fp, branch_color, "%s%s", on_what, branch_name);
		if (!s->is_initial)
			wt_status_print_tracking(s);
	}

	if (s->is_initial) {
		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "#");
		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "# Initial commit");
		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "#");
	}

	wt_status_print_updated(s);
	wt_status_print_unmerged(s);
	wt_status_print_changed(s);
	if (s->submodule_summary &&
	    (!s->ignore_submodule_arg ||
	     strcmp(s->ignore_submodule_arg, "all"))) {
		wt_status_print_submodule_summary(s, 0);  /* staged */
		wt_status_print_submodule_summary(s, 1);  /* unstaged */
	}
	if (s->show_untracked_files) {
		wt_status_print_other(s, &s->untracked, "Untracked", "add");
		if (s->show_ignored_files)
			wt_status_print_other(s, &s->ignored, "Ignored", "add -f");
	} else if (s->commitable)
		fprintf(s->fp, "# Untracked files not listed%s\n",
			advice_status_hints
			? " (use -u option to show untracked files)" : "");

	if (s->verbose)
		wt_status_print_verbose(s);
	if (!s->commitable) {
		if (s->amend)
			fprintf(s->fp, "# No changes\n");
		else if (s->nowarn)
			; /* nothing */
		else if (s->workdir_dirty)
			printf("no changes added to commit%s\n",
				advice_status_hints
				? " (use \"git add\" and/or \"git commit -a\")" : "");
		else if (s->untracked.nr)
			printf("nothing added to commit but untracked files present%s\n",
				advice_status_hints
				? " (use \"git add\" to track)" : "");
		else if (s->is_initial)
			printf("nothing to commit%s\n", advice_status_hints
				? " (create/copy files and use \"git add\" to track)" : "");
		else if (!s->show_untracked_files)
			printf("nothing to commit%s\n", advice_status_hints
				? " (use -u to show untracked files)" : "");
		else
			printf("nothing to commit%s\n", advice_status_hints
				? " (working directory clean)" : "");
	}
}

/* Wants: mode request key */
static enum status_code
option_bind_command(int argc, const char *argv[])
{
	struct key key[1];
	size_t keys = 0;
	enum request request;
	struct keymap *keymap;
	const char *key_arg;

	if (argc < 3)
		return error("Invalid key binding: bind keymap key action");

	if (!(keymap = get_keymap(argv[0], strlen(argv[0])))) {
		if (!strcmp(argv[0], "branch"))
			keymap = get_keymap("refs", strlen("refs"));
		if (!keymap)
			return error("Unknown key map: %s", argv[0]);
	}

	for (keys = 0, key_arg = argv[1]; *key_arg && keys < ARRAY_SIZE(key); keys++) {
		enum status_code code = get_key_value(&key_arg, &key[keys]);

		if (code != SUCCESS)
			return code;
	}

	if (*key_arg && keys == ARRAY_SIZE(key))
		return error("Except for <Esc> combos only one key is allowed "
			     "in key combos: %s", argv[1]);

	request = get_request(argv[2]);
	if (request == REQ_UNKNOWN) {
		static const char *obsolete[][2] = {
			{ "view-branch",		"view-refs" },
		};
		static const char *toggles[][2] = {
			{ "diff-context-down",		"diff-context" },
			{ "diff-context-up",		"diff-context" },
			{ "stage-next",			":/^@@" },
			{ "toggle-author",		"author" },
			{ "toggle-changes",		"show-changes" },
			{ "toggle-commit-order",	"show-commit-order" },
			{ "toggle-date",		"date" },
			{ "toggle-files",		"file-filter" },
			{ "toggle-file-filter",		"file-filter" },
			{ "toggle-file-size",		"file-size" },
			{ "toggle-filename",		"filename" },
			{ "toggle-graphic",		"show-graphic" },
			{ "toggle-id",			"id" },
			{ "toggle-ignore-space",	"show-ignore-space" },
			{ "toggle-lineno",		"line-number" },
			{ "toggle-refs",		"commit-title-refs" },
			{ "toggle-rev-graph",		"commit-title-graph" },
			{ "toggle-show-changes",	"show-changes" },
			{ "toggle-sort-field",		"sort-field" },
			{ "toggle-sort-order",		"sort-order" },
			{ "toggle-title-overflow",	"commit-title-overflow" },
			{ "toggle-untracked-dirs",	"status-untracked-dirs" },
			{ "toggle-vertical-split",	"show-vertical-split" },
		};
		int alias;

		alias = find_remapped(obsolete, ARRAY_SIZE(obsolete), argv[2]);
		if (alias != -1) {
			const char *action = obsolete[alias][1];

			add_keybinding(keymap, get_request(action), key, keys);
			return error("%s has been renamed to %s",
				     obsolete[alias][0], action);
		}

		alias = find_remapped(toggles, ARRAY_SIZE(toggles), argv[2]);
		if (alias != -1) {
			const char *action = toggles[alias][0];
			const char *arg = prefixcmp(action, "diff-context-")
					? NULL : (strstr(action, "-down") ? "-1" : "+1");
			const char *mapped = toggles[alias][1];
			const char *toggle[] = { ":toggle", mapped, arg, NULL};
			const char *other[] = { mapped, NULL };
			const char **prompt = *mapped == ':' ? other : toggle;
			enum status_code code = add_run_request(keymap, key, keys, prompt);

			if (code == SUCCESS)
				code = error("%s has been replaced by `%s%s%s%s'",
					     action, prompt == other ? mapped : ":toggle ",
					     prompt == other ? "" : mapped,
					     arg ? " " : "", arg ? arg : "");
			return code;
		}
	}

	if (request == REQ_UNKNOWN)
		return add_run_request(keymap, key, keys, argv + 2);

	return add_keybinding(keymap, request, key, keys);
}

static int fetch_indices(struct walker *walker, struct alt_base *repo)
{
	unsigned char sha1[20];
	char *url;
	struct strbuf buffer = STRBUF_INIT;
	char *data;
	int i = 0;
	int ret = 0;

	struct active_request_slot *slot;
	struct slot_results results;

	if (repo->got_indices)
		return 0;

	if (walker->get_verbosely)
		fprintf(stderr, "Getting pack list for %s\n", repo->base);

	url = xmalloc(strlen(repo->base) + 21);
	sprintf(url, "%s/objects/info/packs", repo->base);

	slot = get_active_slot();
	slot->results = &results;
	curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	curl_easy_setopt(slot->curl, CURLOPT_URL, url);
	curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
	if (start_active_slot(slot)) {
		run_active_slot(slot);
		if (results.curl_result != CURLE_OK) {
			if (missing_target(&results)) {
				repo->got_indices = 1;
				goto cleanup;
			} else {
				repo->got_indices = 0;
				ret = error("%s", curl_errorstr);
				goto cleanup;
			}
		}
	} else {
		repo->got_indices = 0;
		ret = error("Unable to start request");
		goto cleanup;
	}

	data = buffer.buf;
	while (i < buffer.len) {
		switch (data[i]) {
		case 'P':
			i++;
			if (i + 52 <= buffer.len &&
			    !prefixcmp(data + i, " pack-") &&
			    !prefixcmp(data + i + 46, ".pack\n")) {
				get_sha1_hex(data + i + 6, sha1);
				setup_index(walker, repo, sha1);
				i += 51;
				break;
			}
		default:
			while (i < buffer.len && data[i] != '\n')
				i++;
		}
		i++;
	}

	repo->got_indices = 1;
cleanup:
	strbuf_release(&buffer);
	free(url);
	return ret;
}

int main(int argc, const char **argv)
{
	const char *cmd;

	startup_info = &git_startup_info;

	cmd = git_extract_argv0_path(argv[0]);
	if (!cmd)
		cmd = "git-help";

	git_setup_gettext();

	/*
	 * "git-xxxx" is the same as "git xxxx", but we obviously:
	 *
	 *  - cannot take flags in between the "git" and the "xxxx".
	 *  - cannot execute it externally (since it would just do
	 *    the same thing over again)
	 *
	 * So we just directly call the internal command handler, and
	 * die if that one cannot handle it.
	 */
	if (!prefixcmp(cmd, "git-")) {
		cmd += 4;
		argv[0] = cmd;
		handle_internal_command(argc, argv);
		die("cannot handle %s internally", cmd);
	}

	/* Look for flags.. */
	argv++;
	argc--;
	handle_options(&argv, &argc, NULL);
	if (argc > 0) {
		if (!prefixcmp(argv[0], "--"))
			argv[0] += 2;
	} else {
		/* The user didn't specify a command; give them help */
		commit_pager_choice();
		printf("usage: %s\n\n", git_usage_string);
		list_common_cmds_help();
		printf("\n%s\n", _(git_more_info_string));
		exit(1);
	}
	cmd = argv[0];

	/*
	 * We use PATH to find git commands, but we prepend some higher
	 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
	 * environment, and the $(gitexecdir) from the Makefile at build
	 * time.
	 */
	setup_path();

	while (1) {
		static int done_help = 0;
		static int was_alias = 0;
		was_alias = run_argv(&argc, &argv);
		if (errno != ENOENT)
			break;
		if (was_alias) {
			fprintf(stderr, "Expansion of alias '%s' failed; "
				"'%s' is not a git command\n",
				cmd, argv[0]);
			exit(1);
		}
		if (!done_help) {
			cmd = argv[0] = help_unknown_cmd(cmd);
			done_help = 1;
		} else
			break;
	}

	fprintf(stderr, "Failed to run command '%s': %s\n",
		cmd, strerror(errno));

	return 1;
}

static int perform_http_xact(void)
{
    /* use free instead of g_free so that we can use xstr* functions from
     * libreport/lib/xfuncs.c
     */
    GHashTable *problem_info = g_hash_table_new_full(g_str_hash, g_str_equal,
                                     free, free);
    /* Read header */
    char *body_start = NULL;
    char *messagebuf_data = NULL;
    unsigned messagebuf_len = 0;
    /* Loop until EOF/error/timeout/end_of_header */
    while (1)
    {
        messagebuf_data = xrealloc(messagebuf_data, messagebuf_len + INPUT_BUFFER_SIZE);
        char *p = messagebuf_data + messagebuf_len;
        int rd = read(STDIN_FILENO, p, INPUT_BUFFER_SIZE);
        if (rd < 0)
        {
            if (errno == EINTR) /* SIGALRM? */
                error_msg_and_die("Timed out");
            perror_msg_and_die("read");
        }
        if (rd == 0)
            break;

        log_debug("Received %u bytes of data", rd);
        messagebuf_len += rd;
        total_bytes_read += rd;
        if (total_bytes_read > MAX_MESSAGE_SIZE)
            error_msg_and_die("Message is too long, aborting");

        /* Check whether we see end of header */
        /* Note: we support both [\r]\n\r\n and \n\n */
        char *past_end = messagebuf_data + messagebuf_len;
        if (p > messagebuf_data+1)
            p -= 2; /* start search from two last bytes in last read - they might be '\n\r' */
        while (p < past_end)
        {
            p = memchr(p, '\n', past_end - p);
            if (!p)
                break;
            p++;
            if (p >= past_end)
                break;
            if (*p == '\n'
             || (*p == '\r' && p+1 < past_end && p[1] == '\n')
            ) {
                body_start = p + 1 + (*p == '\r');
                *p = '\0';
                goto found_end_of_header;
            }
        }
    } /* while (read) */
 found_end_of_header: ;
    log_debug("Request: %s", messagebuf_data);

    /* Sanitize and analyze header.
     * Header now is in messagebuf_data, NUL terminated string,
     * with last empty line deleted (by placement of NUL).
     * \r\n are not (yet) converted to \n, multi-line headers also
     * not converted.
     */
    /* First line must be "op<space>[http://host]/path<space>HTTP/n.n".
     * <space> is exactly one space char.
     */
    if (prefixcmp(messagebuf_data, "DELETE ") == 0)
    {
        messagebuf_data += strlen("DELETE ");
        char *space = strchr(messagebuf_data, ' ');
        if (!space || prefixcmp(space+1, "HTTP/") != 0)
            return 400; /* Bad Request */
        *space = '\0';
        //decode_url(messagebuf_data); %20 => ' '
        alarm(0);
        return delete_path(messagebuf_data);
    }

    /* We erroneously used "PUT /" to create new problems.
     * POST is the correct request in this case:
     * "PUT /" implies creation or replace of resource named "/"!
     * Delete PUT in 2014.
     */
    if (prefixcmp(messagebuf_data, "PUT ") != 0
     && prefixcmp(messagebuf_data, "POST ") != 0
    ) {
        return 400; /* Bad Request */
    }

    enum {
        CREATION_NOTIFICATION,
        CREATION_REQUEST,
    };
    int url_type;
    char *url = skip_non_whitespace(messagebuf_data) + 1; /* skip "POST " */
    if (prefixcmp(url, "/creation_notification ") == 0)
        url_type = CREATION_NOTIFICATION;
    else if (prefixcmp(url, "/ ") == 0)
        url_type = CREATION_REQUEST;
    else
//.........这里部分代码省略.........

static int store_updated_refs(const char *url, const char *remote_name,
		struct ref *ref_map)
{
	FILE *fp;
	struct commit *commit;
	int url_len, i, note_len, shown_url = 0, rc = 0;
	char note[1024];
	const char *what, *kind;
	struct ref *rm;
	char *filename = git_path("FETCH_HEAD");

	fp = fopen(filename, "a");
	if (!fp)
		return error("cannot open %s: %s\n", filename, strerror(errno));
	for (rm = ref_map; rm; rm = rm->next) {
		struct ref *ref = NULL;

		if (rm->peer_ref) {
			ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
			strcpy(ref->name, rm->peer_ref->name);
			hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
			hashcpy(ref->new_sha1, rm->old_sha1);
			ref->force = rm->peer_ref->force;
		}

		commit = lookup_commit_reference_gently(rm->old_sha1, 1);
		if (!commit)
			rm->merge = 0;

		if (!strcmp(rm->name, "HEAD")) {
			kind = "";
			what = "";
		}
		else if (!prefixcmp(rm->name, "refs/heads/")) {
			kind = "branch";
			what = rm->name + 11;
		}
		else if (!prefixcmp(rm->name, "refs/tags/")) {
			kind = "tag";
			what = rm->name + 10;
		}
		else if (!prefixcmp(rm->name, "refs/remotes/")) {
			kind = "remote branch";
			what = rm->name + 13;
		}
		else {
			kind = "";
			what = rm->name;
		}

		url_len = strlen(url);
		for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
			;
		url_len = i + 1;
		if (4 < i && !strncmp(".git", url + i - 3, 4))
			url_len = i - 3;

		note_len = 0;
		if (*what) {
			if (*kind)
				note_len += sprintf(note + note_len, "%s ",
						    kind);
			note_len += sprintf(note + note_len, "'%s' of ", what);
		}
		note_len += sprintf(note + note_len, "%.*s", url_len, url);
		fprintf(fp, "%s\t%s\t%s\n",
			sha1_to_hex(commit ? commit->object.sha1 :
				    rm->old_sha1),
			rm->merge ? "" : "not-for-merge",
			note);

		if (ref)
			rc |= update_local_ref(ref, what, note);
		else
			sprintf(note, "* %-*s %-*s -> FETCH_HEAD",
				SUMMARY_WIDTH, *kind ? kind : "branch",
				 REFCOL_WIDTH, *what ? what : "HEAD");
		if (*note) {
			if (verbosity >= 0 && !shown_url) {
				fprintf(stderr, "From %.*s\n",
						url_len, url);
				shown_url = 1;
			}
			if (verbosity >= 0)
				fprintf(stderr, " %s\n", note);
		}
	}
	fclose(fp);
	if (rc & 2)
		error("some local refs could not be updated; try running\n"
		      " 'git remote prune %s' to remove any old, conflicting "
		      "branches", remote_name);
	return rc;
}

static int log_ref_write(const char *ref_name, const unsigned char *old_sha1,
			 const unsigned char *new_sha1, const char *msg)
{
	int logfd, written, oflags = O_APPEND | O_WRONLY;
	unsigned maxlen, len;
	int msglen;
	char log_file[PATH_MAX];
	char *logrec;
	const char *committer;

	if (log_all_ref_updates < 0)
		log_all_ref_updates = !is_bare_repository();

	git_snpath(log_file, sizeof(log_file), "logs/%s", ref_name);

	if (log_all_ref_updates &&
	    (!prefixcmp(ref_name, "refs/heads/") ||
	     !prefixcmp(ref_name, "refs/remotes/") ||
	     !strcmp(ref_name, "HEAD"))) {
		if (safe_create_leading_directories(log_file) < 0)
			return error("unable to create directory for %s",
				     log_file);
		oflags |= O_CREAT;
	}

	logfd = open(log_file, oflags, 0666);
	if (logfd < 0) {
		if (!(oflags & O_CREAT) && errno == ENOENT)
			return 0;

		if ((oflags & O_CREAT) && errno == EISDIR) {
			if (remove_empty_directories(log_file)) {
				return error("There are still logs under '%s'",
					     log_file);
			}
			logfd = open(log_file, oflags, 0666);
		}

		if (logfd < 0)
			return error("Unable to append to %s: %s",
				     log_file, strerror(errno));
	}

	adjust_shared_perm(log_file);

	msglen = msg ? strlen(msg) : 0;
	committer = git_committer_info(0);
	maxlen = strlen(committer) + msglen + 100;
	logrec = xmalloc(maxlen);
	len = sprintf(logrec, "%s %s %s\n",
		      sha1_to_hex(old_sha1),
		      sha1_to_hex(new_sha1),
		      committer);
	if (msglen)
		len += copy_msg(logrec + len - 1, msg) - 1;
	written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1;
	free(logrec);
	if (close(logfd) != 0 || written != len)
		return error("Unable to append to %s", log_file);
	return 0;
}

static int is_branch(const char *refname)
{
	return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/");
}

struct transport *transport_get(struct remote *remote, const char *url)
{
	const char *helper;
	struct transport *ret = xcalloc(1, sizeof(*ret));

	ret->progress = isatty(2);

	if (!remote)
		die("No remote provided to transport_get()");

	ret->got_remote_refs = 0;
	ret->remote = remote;
	helper = remote->foreign_vcs;

	if (!url && remote->url)
		url = remote->url[0];
	ret->url = url;

	/* maybe it is a foreign URL? */
	if (url) {
		const char *p = url;

		while (is_urlschemechar(p == url, *p))
			p++;
		if (!prefixcmp(p, "::"))
			helper = xstrndup(url, p - url);
	}

	if (helper) {
		transport_helper_init(ret, helper);
	} else if (!prefixcmp(url, "rsync:")) {
		ret->get_refs_list = get_refs_via_rsync;
		ret->fetch = fetch_objs_via_rsync;
		ret->push = rsync_transport_push;
		ret->smart_options = NULL;
	} else if (is_local(url) && is_file(url) && is_bundle(url, 1)) {
		struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
		ret->data = data;
		ret->get_refs_list = get_refs_from_bundle;
		ret->fetch = fetch_refs_from_bundle;
		ret->disconnect = close_bundle;
		ret->smart_options = NULL;
	} else if (!is_url(url)
		|| !prefixcmp(url, "file://")
		|| !prefixcmp(url, "git://")
		|| !prefixcmp(url, "ssh://")
		|| !prefixcmp(url, "git+ssh://")
		|| !prefixcmp(url, "ssh+git://")) {
		/* These are builtin smart transports. */
		struct git_transport_data *data = xcalloc(1, sizeof(*data));
		ret->data = data;
		ret->set_option = NULL;
		ret->get_refs_list = get_refs_via_connect;
		ret->fetch = fetch_refs_via_pack;
		ret->push_refs = git_transport_push;
		ret->connect = connect_git;
		ret->disconnect = disconnect_git;
		ret->smart_options = &(data->options);

		data->conn = NULL;
		data->got_remote_heads = 0;
	} else {
		/* Unknown protocol in URL. Pass to external handler. */
		int len = external_specification_len(url);
		char *handler = xmalloc(len + 1);
		handler[len] = 0;
		strncpy(handler, url, len);
		transport_helper_init(ret, handler);
	}

	if (ret->smart_options) {
		ret->smart_options->thin = 1;
		ret->smart_options->uploadpack = "git-upload-pack";
		if (remote->uploadpack)
			ret->smart_options->uploadpack = remote->uploadpack;
		ret->smart_options->receivepack = "git-receive-pack";
		if (remote->receivepack)
			ret->smart_options->receivepack = remote->receivepack;
	}

	return ret;
}

//.........这里部分代码省略.........
			}
			if (!strcmp(arg, "--branches")) {
				for_each_branch_ref(show_reference, NULL);
				clear_ref_exclusion(&ref_excludes);
				continue;
			}
			if (starts_with(arg, "--tags=")) {
				for_each_glob_ref_in(show_reference, arg + 7,
					"refs/tags/", NULL);
				clear_ref_exclusion(&ref_excludes);
				continue;
			}
			if (!strcmp(arg, "--tags")) {
				for_each_tag_ref(show_reference, NULL);
				clear_ref_exclusion(&ref_excludes);
				continue;
			}
			if (starts_with(arg, "--glob=")) {
				for_each_glob_ref(show_reference, arg + 7, NULL);
				clear_ref_exclusion(&ref_excludes);
				continue;
			}
			if (starts_with(arg, "--remotes=")) {
				for_each_glob_ref_in(show_reference, arg + 10,
					"refs/remotes/", NULL);
				clear_ref_exclusion(&ref_excludes);
				continue;
			}
			if (!strcmp(arg, "--remotes")) {
				for_each_remote_ref(show_reference, NULL);
				clear_ref_exclusion(&ref_excludes);
				continue;
			}
			if (!prefixcmp(arg, "--exclude=")) {
				add_ref_exclusion(&ref_excludes, arg + 10);
				continue;
			}
			if (!strcmp(arg, "--local-env-vars")) {
				int i;
				for (i = 0; local_repo_env[i]; i++)
					printf("%s\n", local_repo_env[i]);
				continue;
			}
			if (!strcmp(arg, "--show-toplevel")) {
				const char *work_tree = get_git_work_tree();
				if (work_tree)
					puts(work_tree);
				continue;
			}
			if (!strcmp(arg, "--show-prefix")) {
				if (prefix)
					puts(prefix);
				else
					putchar('\n');
				continue;
			}
			if (!strcmp(arg, "--show-cdup")) {
				const char *pfx = prefix;
				if (!is_inside_work_tree()) {
					const char *work_tree =
						get_git_work_tree();
					if (work_tree)
						printf("%s\n", work_tree);
					continue;
				}
				while (pfx) {

static const char *rsync_url(const char *url)
{
	return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
}

int cmd_merge(int argc, const char **argv, const char *prefix)
{
	unsigned char result_tree[20];
	unsigned char stash[20];
	unsigned char head_sha1[20];
	struct commit *head_commit;
	struct strbuf buf = STRBUF_INIT;
	const char *head_arg;
	int flag, i, ret = 0, head_subsumed;
	int best_cnt = -1, merge_was_ok = 0, automerge_was_ok = 0;
	struct commit_list *common = NULL;
	const char *best_strategy = NULL, *wt_strategy = NULL;
	struct commit_list *remoteheads, *p;
	void *branch_to_free;

	if (argc == 2 && !strcmp(argv[1], "-h"))
		usage_with_options(builtin_merge_usage, builtin_merge_options);

	/*
	 * Check if we are _not_ on a detached HEAD, i.e. if there is a
	 * current branch.
	 */
	branch = branch_to_free = resolve_refdup("HEAD", head_sha1, 0, &flag);
	if (branch && !prefixcmp(branch, "refs/heads/"))
		branch += 11;
	if (!branch || is_null_sha1(head_sha1))
		head_commit = NULL;
	else
		head_commit = lookup_commit_or_die(head_sha1, "HEAD");

	git_config(git_merge_config, NULL);

	if (branch_mergeoptions)
		parse_branch_merge_options(branch_mergeoptions);
	argc = parse_options(argc, argv, prefix, builtin_merge_options,
			builtin_merge_usage, 0);
	if (shortlog_len < 0)
		shortlog_len = (merge_log_config > 0) ? merge_log_config : 0;

	if (verbosity < 0 && show_progress == -1)
		show_progress = 0;

	if (abort_current_merge) {
		int nargc = 2;
		const char *nargv[] = {"reset", "--merge", NULL};

		if (!file_exists(git_path("MERGE_HEAD")))
			die(_("There is no merge to abort (MERGE_HEAD missing)."));

		/* Invoke 'git reset --merge' */
		ret = cmd_reset(nargc, nargv, prefix);
		goto done;
	}

	if (read_cache_unmerged())
		die_resolve_conflict("merge");

	if (file_exists(git_path("MERGE_HEAD"))) {
		/*
		 * There is no unmerged entry, don't advise 'git
		 * add/rm <file>', just 'git commit'.
		 */
		if (advice_resolve_conflict)
			die(_("You have not concluded your merge (MERGE_HEAD exists).\n"
				  "Please, commit your changes before you can merge."));
		else
			die(_("You have not concluded your merge (MERGE_HEAD exists)."));
	}
	if (file_exists(git_path("CHERRY_PICK_HEAD"))) {
		if (advice_resolve_conflict)
			die(_("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists).\n"
			    "Please, commit your changes before you can merge."));
		else
			die(_("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists)."));
	}
	resolve_undo_clear();

	if (verbosity < 0)
		show_diffstat = 0;

	if (squash) {
		if (!allow_fast_forward)
			die(_("You cannot combine --squash with --no-ff."));
		option_commit = 0;
	}

	if (!allow_fast_forward && fast_forward_only)
		die(_("You cannot combine --no-ff with --ff-only."));

	if (!abort_current_merge) {
		if (!argc) {
			if (default_to_upstream)
				argc = setup_with_upstream(&argv);
			else
				die(_("No commit specified and merge.defaultToUpstream not set."));
		} else if (argc == 1 && !strcmp(argv[0], "-"))
			argv[0] = "@{-1}";
	}
	if (!argc)
		usage_with_options(builtin_merge_usage,
//.........这里部分代码省略.........

static int match_explicit(struct ref *src, struct ref *dst,
			  struct ref ***dst_tail,
			  struct refspec *rs)
{
	struct ref *matched_src, *matched_dst;

	const char *dst_value = rs->dst;
	char *dst_guess;

	if (rs->pattern || rs->matching)
		return 0;

	matched_src = matched_dst = NULL;
	switch (count_refspec_match(rs->src, src, &matched_src)) {
	case 1:
		break;
	case 0:
		/* The source could be in the get_sha1() format
		 * not a reference name.  :refs/other is a
		 * way to delete 'other' ref at the remote end.
		 */
		matched_src = try_explicit_object_name(rs->src);
		if (!matched_src)
			return error("src refspec %s does not match any.", rs->src);
		break;
	default:
		return error("src refspec %s matches more than one.", rs->src);
	}

	if (!dst_value) {
		unsigned char sha1[20];
		int flag;

		dst_value = resolve_ref(matched_src->name, sha1, 1, &flag);
		if (!dst_value ||
		    ((flag & REF_ISSYMREF) &&
		     prefixcmp(dst_value, "refs/heads/")))
			die("%s cannot be resolved to branch.",
			    matched_src->name);
	}

	switch (count_refspec_match(dst_value, dst, &matched_dst)) {
	case 1:
		break;
	case 0:
		if (!memcmp(dst_value, "refs/", 5))
			matched_dst = make_linked_ref(dst_value, dst_tail);
		else if((dst_guess = guess_ref(dst_value, matched_src)))
			matched_dst = make_linked_ref(dst_guess, dst_tail);
		else
			error("unable to push to unqualified destination: %s\n"
			      "The destination refspec neither matches an "
			      "existing ref on the remote nor\n"
			      "begins with refs/, and we are unable to "
			      "guess a prefix based on the source ref.",
			      dst_value);
		break;
	default:
		matched_dst = NULL;
		error("dst refspec %s matches more than one.",
		      dst_value);
		break;
	}
	if (!matched_dst)
		return -1;
	if (matched_dst->peer_ref)
		return error("dst ref %s receives from more than one src.",
		      matched_dst->name);
	else {
		matched_dst->peer_ref = matched_src;
		matched_dst->force = rs->force;
	}
	return 0;
}

static void add_repo(const char *base, const char *path, repo_config_fn fn)
{
	struct stat st;
	struct passwd *pwd;
	char *rel, *p, *slash;
	int n;
	size_t size;

	if (stat(path, &st)) {
		fprintf(stderr, "Error accessing %s: %s (%d)\n",
			path, strerror(errno), errno);
		return;
	}

	if (ctx.cfg.strict_export && stat(fmt("%s/%s", path, ctx.cfg.strict_export), &st))
		return;

	if (!stat(fmt("%s/noweb", path), &st))
		return;

	owner = NULL;
	if (ctx.cfg.enable_gitweb_owner)
		git_config_from_file(git_owner_config, fmt("%s/config", path), NULL);
	if (base == path)
		rel = xstrdup(fmt("%s", path));
	else
		rel = xstrdup(fmt("%s", path + strlen(base) + 1));

	if (!strcmp(rel + strlen(rel) - 5, "/.git"))
		rel[strlen(rel) - 5] = '\0';

	repo = cgit_add_repo(rel);
	if (ctx.cfg.remove_suffix)
		if ((p = strrchr(repo->url, '.')) && !strcmp(p, ".git"))
			*p = '\0';
	repo->name = repo->url;
	repo->path = xstrdup(path);
	while (!owner) {
		if ((pwd = getpwuid(st.st_uid)) == NULL) {
			fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
				path, strerror(errno), errno);
			break;
		}
		if (pwd->pw_gecos)
			if ((p = strchr(pwd->pw_gecos, ',')))
				*p = '\0';
		owner = xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name);
	}
	repo->owner = owner;

	p = fmt("%s/description", path);
	if (!stat(p, &st))
		readfile(p, &repo->desc, &size);

	if (!repo->readme) {
		p = fmt("%s/README.html", path);
		if (!stat(p, &st))
			repo->readme = "README.html";
	}
	if (ctx.cfg.section_from_path) {
		n  = ctx.cfg.section_from_path;
		if (n > 0) {
			slash = rel;
			while (slash && n && (slash = strchr(slash, '/')))
				n--;
		} else {
			slash = rel + strlen(rel);
			while (slash && n && (slash = xstrrchr(rel, slash, '/')))
				n++;
		}
		if (slash && !n) {
			*slash = '\0';
			repo->section = xstrdup(rel);
			*slash = '/';
			if (!prefixcmp(repo->name, repo->section)) {
				repo->name += strlen(repo->section);
				if (*repo->name == '/')
					repo->name++;
			}
		}
	}

	p = fmt("%s/cgitrc", path);
	if (!stat(p, &st)) {
		config_fn = fn;
		parse_configfile(xstrdup(p), &repo_config);
	}
}

int cmd_format_patch(int argc, const char **argv, const char *prefix)
{
	struct commit *commit;
	struct commit **list = NULL;
	struct rev_info rev;
	int nr = 0, total, i, j;
	int use_stdout = 0;
	int start_number = -1;
	int keep_subject = 0;
	int numbered_files = 0;		/* _just_ numbers */
	int subject_prefix = 0;
	int ignore_if_in_upstream = 0;
	int thread = 0;
	int cover_letter = 0;
	int boundary_count = 0;
	int no_binary_diff = 0;
	struct commit *origin = NULL, *head = NULL;
	const char *in_reply_to = NULL;
	struct patch_ids ids;
	char *add_signoff = NULL;
	struct strbuf buf;

	git_config(git_format_config, NULL);
	init_revisions(&rev, prefix);
	rev.commit_format = CMIT_FMT_EMAIL;
	rev.verbose_header = 1;
	rev.diff = 1;
	rev.combine_merges = 0;
	rev.ignore_merges = 1;
	DIFF_OPT_SET(&rev.diffopt, RECURSIVE);

	rev.subject_prefix = fmt_patch_subject_prefix;

	/*
	 * Parse the arguments before setup_revisions(), or something
	 * like "git format-patch -o a123 HEAD^.." may fail; a123 is
	 * possibly a valid SHA1.
	 */
	for (i = 1, j = 1; i < argc; i++) {
		if (!strcmp(argv[i], "--stdout"))
			use_stdout = 1;
		else if (!strcmp(argv[i], "-n") ||
				!strcmp(argv[i], "--numbered"))
			numbered = 1;
		else if (!strcmp(argv[i], "-N") ||
				!strcmp(argv[i], "--no-numbered")) {
			numbered = 0;
			auto_number = 0;
		}
		else if (!prefixcmp(argv[i], "--start-number="))
			start_number = strtol(argv[i] + 15, NULL, 10);
		else if (!strcmp(argv[i], "--numbered-files"))
			numbered_files = 1;
		else if (!strcmp(argv[i], "--start-number")) {
			i++;
			if (i == argc)
				die("Need a number for --start-number");
			start_number = strtol(argv[i], NULL, 10);
		}
		else if (!prefixcmp(argv[i], "--cc=")) {
			ALLOC_GROW(extra_cc, extra_cc_nr + 1, extra_cc_alloc);
			extra_cc[extra_cc_nr++] = xstrdup(argv[i] + 5);
		}
		else if (!strcmp(argv[i], "-k") ||
				!strcmp(argv[i], "--keep-subject")) {
			keep_subject = 1;
			rev.total = -1;
		}
		else if (!strcmp(argv[i], "--output-directory") ||
			 !strcmp(argv[i], "-o")) {
			i++;
			if (argc <= i)
				die("Which directory?");
			if (output_directory)
				die("Two output directories?");
			output_directory = argv[i];
		}
		else if (!strcmp(argv[i], "--signoff") ||
			 !strcmp(argv[i], "-s")) {
			const char *committer;
			const char *endpos;
			committer = git_committer_info(IDENT_ERROR_ON_NO_NAME);
			endpos = strchr(committer, '>');
			if (!endpos)
				die("bogos committer info %s\n", committer);
			add_signoff = xmemdupz(committer, endpos - committer + 1);
		}
		else if (!strcmp(argv[i], "--attach")) {
			rev.mime_boundary = git_version_string;
			rev.no_inline = 1;
		}
		else if (!prefixcmp(argv[i], "--attach=")) {
			rev.mime_boundary = argv[i] + 9;
			rev.no_inline = 1;
		}
		else if (!strcmp(argv[i], "--inline")) {
			rev.mime_boundary = git_version_string;
			rev.no_inline = 0;
		}
		else if (!prefixcmp(argv[i], "--inline=")) {
//.........这里部分代码省略.........

static int run_post_create(const char *dirname)
{
    /* If doesn't start with "g_settings_dump_location/"... */
    if (!dir_is_in_dump_location(dirname))
    {
        /* Then refuse to operate on it (someone is attacking us??) */
        error_msg("Bad problem directory name '%s', should start with: '%s'", dirname, g_settings_dump_location);
        return 400; /* Bad Request */
    }
    if (!dump_dir_accessible_by_uid(dirname, client_uid))
    {
        if (errno == ENOTDIR)
        {
            error_msg("Path '%s' isn't problem directory", dirname);
            return 404; /* Not Found */
        }
        error_msg("Problem directory '%s' can't be accessed by user with uid %ld", dirname, (long)client_uid);
        return 403; /* Forbidden */
    }

    int child_stdout_fd;
    int child_pid = spawn_event_handler_child(dirname, "post-create", &child_stdout_fd);

    char *dup_of_dir = NULL;
    struct strbuf *cmd_output = strbuf_new();

    bool child_is_post_create = 1; /* else it is a notify child */

 read_child_output:
    //log("Reading from event fd %d", child_stdout_fd);

    /* Read streamed data and split lines */
    for (;;)
    {
        char buf[250]; /* usually we get one line, no need to have big buf */
        errno = 0;
        int r = safe_read(child_stdout_fd, buf, sizeof(buf) - 1);
        if (r <= 0)
            break;
        buf[r] = '\0';

        /* split lines in the current buffer */
        char *raw = buf;
        char *newline;
        while ((newline = strchr(raw, '\n')) != NULL)
        {
            *newline = '\0';
            strbuf_append_str(cmd_output, raw);
            char *msg = cmd_output->buf;

            /* Hmm, DUP_OF_DIR: ends up in syslog. move log() into 'else'? */
            log("%s", msg);

            if (child_is_post_create
             && prefixcmp(msg, "DUP_OF_DIR: ") == 0
            ) {
                free(dup_of_dir);
                dup_of_dir = xstrdup(msg + strlen("DUP_OF_DIR: "));
            }

            strbuf_clear(cmd_output);
            /* jump to next line */
            raw = newline + 1;
        }

        /* beginning of next line. the line continues by next read */
        strbuf_append_str(cmd_output, raw);
    }

    /* EOF/error */

    /* Wait for child to actually exit, collect status */
    int status = 0;
    if (safe_waitpid(child_pid, &status, 0) <= 0)
    /* should not happen */
        perror_msg("waitpid(%d)", child_pid);

    /* If it was a "notify[-dup]" event, then we're done */
    if (!child_is_post_create)
        goto ret;

    /* exit 0 means "this is a good, non-dup dir" */
    /* exit with 1 + "DUP_OF_DIR: dir" string => dup */
    if (status != 0)
    {
        if (WIFSIGNALED(status))
        {
            log("'post-create' on '%s' killed by signal %d",
                            dirname, WTERMSIG(status));
            goto delete_bad_dir;
        }
        /* else: it is WIFEXITED(status) */
        if (!dup_of_dir)
        {
            log("'post-create' on '%s' exited with %d",
                            dirname, WEXITSTATUS(statu