git

1
/*
2
 * Builtin help command
3
 */
4
#include "builtin.h"
5
#include "config.h"
6
#include "exec-cmd.h"
7
#include "gettext.h"
8
#include "pager.h"
9
#include "parse-options.h"
10
#include "path.h"
11
#include "run-command.h"
12
#include "config-list.h"
13
#include "help.h"
14
#include "alias.h"
15
#include "setup.h"
16

17
#ifndef DEFAULT_HELP_FORMAT
18
#define DEFAULT_HELP_FORMAT "man"
19
#endif
20

21
static struct man_viewer_list {
22
	struct man_viewer_list *next;
23
	char name[FLEX_ARRAY];
24
} *man_viewer_list;
25

26
static struct man_viewer_info_list {
27
	struct man_viewer_info_list *next;
28
	const char *info;
29
	char name[FLEX_ARRAY];
30
} *man_viewer_info_list;
31

32
enum help_format {
33
	HELP_FORMAT_NONE,
34
	HELP_FORMAT_MAN,
35
	HELP_FORMAT_INFO,
36
	HELP_FORMAT_WEB
37
};
38

39
enum show_config_type {
40
	SHOW_CONFIG_HUMAN,
41
	SHOW_CONFIG_VARS,
42
	SHOW_CONFIG_SECTIONS,
43
};
44

45
static enum help_action {
46
	HELP_ACTION_ALL = 1,
47
	HELP_ACTION_GUIDES,
48
	HELP_ACTION_CONFIG,
49
	HELP_ACTION_USER_INTERFACES,
50
	HELP_ACTION_DEVELOPER_INTERFACES,
51
	HELP_ACTION_CONFIG_FOR_COMPLETION,
52
	HELP_ACTION_CONFIG_SECTIONS_FOR_COMPLETION,
53
} cmd_mode;
54

55
static const char *html_path;
56
static int verbose = 1;
57
static enum help_format help_format = HELP_FORMAT_NONE;
58
static int exclude_guides;
59
static int show_external_commands = -1;
60
static int show_aliases = -1;
61
static struct option builtin_help_options[] = {
62
	OPT_CMDMODE('a', "all", &cmd_mode, N_("print all available commands"),
63
		    HELP_ACTION_ALL),
64
	OPT_BOOL(0, "external-commands", &show_external_commands,
65
		 N_("show external commands in --all")),
66
	OPT_BOOL(0, "aliases", &show_aliases, N_("show aliases in --all")),
67
	OPT_HIDDEN_BOOL(0, "exclude-guides", &exclude_guides, N_("exclude guides")),
68
	OPT_SET_INT('m', "man", &help_format, N_("show man page"), HELP_FORMAT_MAN),
69
	OPT_SET_INT('w', "web", &help_format, N_("show manual in web browser"),
70
			HELP_FORMAT_WEB),
71
	OPT_SET_INT('i', "info", &help_format, N_("show info page"),
72
			HELP_FORMAT_INFO),
73
	OPT__VERBOSE(&verbose, N_("print command description")),
74

75
	OPT_CMDMODE('g', "guides", &cmd_mode, N_("print list of useful guides"),
76
		    HELP_ACTION_GUIDES),
77
	OPT_CMDMODE(0, "user-interfaces", &cmd_mode,
78
		    N_("print list of user-facing repository, command and file interfaces"),
79
		    HELP_ACTION_USER_INTERFACES),
80
	OPT_CMDMODE(0, "developer-interfaces", &cmd_mode,
81
		    N_("print list of file formats, protocols and other developer interfaces"),
82
		    HELP_ACTION_DEVELOPER_INTERFACES),
83
	OPT_CMDMODE('c', "config", &cmd_mode, N_("print all configuration variable names"),
84
		    HELP_ACTION_CONFIG),
85
	OPT_CMDMODE_F(0, "config-for-completion", &cmd_mode, "",
86
		    HELP_ACTION_CONFIG_FOR_COMPLETION, PARSE_OPT_HIDDEN),
87
	OPT_CMDMODE_F(0, "config-sections-for-completion", &cmd_mode, "",
88
		    HELP_ACTION_CONFIG_SECTIONS_FOR_COMPLETION, PARSE_OPT_HIDDEN),
89

90
	OPT_END(),
91
};
92

93
static const char * const builtin_help_usage[] = {
94
	"git help [-a|--all] [--[no-]verbose] [--[no-]external-commands] [--[no-]aliases]",
95
	N_("git help [[-i|--info] [-m|--man] [-w|--web]] [<command>|<doc>]"),
96
	"git help [-g|--guides]",
97
	"git help [-c|--config]",
98
	"git help [--user-interfaces]",
99
	"git help [--developer-interfaces]",
100
	NULL
101
};
102

103
struct slot_expansion {
104
	const char *prefix;
105
	const char *placeholder;
106
	void (*fn)(struct string_list *list, const char *prefix);
107
	int found;
108
};
109

110
static void list_config_help(enum show_config_type type)
111
{
112
	struct slot_expansion slot_expansions[] = {
113
		{ "advice", "*", list_config_advices },
114
		{ "color.branch", "<slot>", list_config_color_branch_slots },
115
		{ "color.decorate", "<slot>", list_config_color_decorate_slots },
116
		{ "color.diff", "<slot>", list_config_color_diff_slots },
117
		{ "color.grep", "<slot>", list_config_color_grep_slots },
118
		{ "color.interactive", "<slot>", list_config_color_interactive_slots },
119
		{ "color.remote", "<slot>", list_config_color_sideband_slots },
120
		{ "color.status", "<slot>", list_config_color_status_slots },
121
		{ "fsck", "<msg-id>", list_config_fsck_msg_ids },
122
		{ "receive.fsck", "<msg-id>", list_config_fsck_msg_ids },
123
		{ NULL, NULL, NULL }
124
	};
125
	const char **p;
126
	struct slot_expansion *e;
127
	struct string_list keys = STRING_LIST_INIT_DUP;
128
	struct string_list keys_uniq = STRING_LIST_INIT_DUP;
129
	struct string_list_item *item;
130
	int i;
131

132
	for (p = config_name_list; *p; p++) {
133
		const char *var = *p;
134
		struct strbuf sb = STRBUF_INIT;
135

136
		for (e = slot_expansions; e->prefix; e++) {
137

138
			strbuf_reset(&sb);
139
			strbuf_addf(&sb, "%s.%s", e->prefix, e->placeholder);
140
			if (!strcasecmp(var, sb.buf)) {
141
				e->fn(&keys, e->prefix);
142
				e->found++;
143
				break;
144
			}
145
		}
146
		strbuf_release(&sb);
147
		if (!e->prefix)
148
			string_list_append(&keys, var);
149
	}
150

151
	for (e = slot_expansions; e->prefix; e++)
152
		if (!e->found)
153
			BUG("slot_expansion %s.%s is not used",
154
			    e->prefix, e->placeholder);
155

156
	string_list_sort(&keys);
157
	for (i = 0; i < keys.nr; i++) {
158
		const char *var = keys.items[i].string;
159
		const char *wildcard, *tag, *cut;
160
		const char *dot = NULL;
161
		struct strbuf sb = STRBUF_INIT;
162

163
		switch (type) {
164
		case SHOW_CONFIG_HUMAN:
165
			puts(var);
166
			continue;
167
		case SHOW_CONFIG_SECTIONS:
168
			dot = strchr(var, '.');
169
			break;
170
		case SHOW_CONFIG_VARS:
171
			break;
172
		}
173
		wildcard = strchr(var, '*');
174
		tag = strchr(var, '<');
175

176
		if (!dot && !wildcard && !tag) {
177
			string_list_append(&keys_uniq, var);
178
			continue;
179
		}
180

181
		if (dot)
182
			cut = dot;
183
		else if (wildcard && !tag)
184
			cut = wildcard;
185
		else if (!wildcard && tag)
186
			cut = tag;
187
		else
188
			cut = wildcard < tag ? wildcard : tag;
189

190
		strbuf_add(&sb, var, cut - var);
191
		string_list_append(&keys_uniq, sb.buf);
192
		strbuf_release(&sb);
193

194
	}
195
	string_list_clear(&keys, 0);
196
	string_list_remove_duplicates(&keys_uniq, 0);
197
	for_each_string_list_item(item, &keys_uniq)
198
		puts(item->string);
199
	string_list_clear(&keys_uniq, 0);
200
}
201

202
static enum help_format parse_help_format(const char *format)
203
{
204
	if (!strcmp(format, "man"))
205
		return HELP_FORMAT_MAN;
206
	if (!strcmp(format, "info"))
207
		return HELP_FORMAT_INFO;
208
	if (!strcmp(format, "web") || !strcmp(format, "html"))
209
		return HELP_FORMAT_WEB;
210
	/*
211
	 * Please update _git_config() in git-completion.bash when you
212
	 * add new help formats.
213
	 */
214
	die(_("unrecognized help format '%s'"), format);
215
}
216

217
static const char *get_man_viewer_info(const char *name)
218
{
219
	struct man_viewer_info_list *viewer;
220

221
	for (viewer = man_viewer_info_list; viewer; viewer = viewer->next)
222
	{
223
		if (!strcasecmp(name, viewer->name))
224
			return viewer->info;
225
	}
226
	return NULL;
227
}
228

229
static int check_emacsclient_version(void)
230
{
231
	struct strbuf buffer = STRBUF_INIT;
232
	struct child_process ec_process = CHILD_PROCESS_INIT;
233
	int version;
234

235
	/* emacsclient prints its version number on stderr */
236
	strvec_pushl(&ec_process.args, "emacsclient", "--version", NULL);
237
	ec_process.err = -1;
238
	ec_process.stdout_to_stderr = 1;
239
	if (start_command(&ec_process))
240
		return error(_("Failed to start emacsclient."));
241

242
	strbuf_read(&buffer, ec_process.err, 20);
243
	close(ec_process.err);
244

245
	/*
246
	 * Don't bother checking return value, because "emacsclient --version"
247
	 * seems to always exits with code 1.
248
	 */
249
	finish_command(&ec_process);
250

251
	if (!starts_with(buffer.buf, "emacsclient")) {
252
		strbuf_release(&buffer);
253
		return error(_("Failed to parse emacsclient version."));
254
	}
255

256
	strbuf_remove(&buffer, 0, strlen("emacsclient"));
257
	version = atoi(buffer.buf);
258

259
	if (version < 22) {
260
		strbuf_release(&buffer);
261
		return error(_("emacsclient version '%d' too old (< 22)."),
262
			version);
263
	}
264

265
	strbuf_release(&buffer);
266
	return 0;
267
}
268

269
static void exec_woman_emacs(const char *path, const char *page)
270
{
271
	if (!check_emacsclient_version()) {
272
		/* This works only with emacsclient version >= 22. */
273
		struct strbuf man_page = STRBUF_INIT;
274

275
		if (!path)
276
			path = "emacsclient";
277
		strbuf_addf(&man_page, "(woman \"%s\")", page);
278
		execlp(path, "emacsclient", "-e", man_page.buf, (char *)NULL);
279
		warning_errno(_("failed to exec '%s'"), path);
280
		strbuf_release(&man_page);
281
	}
282
}
283

284
static void exec_man_konqueror(const char *path, const char *page)
285
{
286
	const char *display = getenv("DISPLAY");
287
	if (display && *display) {
288
		struct strbuf man_page = STRBUF_INIT;
289
		const char *filename = "kfmclient";
290

291
		/* It's simpler to launch konqueror using kfmclient. */
292
		if (path) {
293
			size_t len;
294
			if (strip_suffix(path, "/konqueror", &len))
295
				path = xstrfmt("%.*s/kfmclient", (int)len, path);
296
			filename = basename((char *)path);
297
		} else
298
			path = "kfmclient";
299
		strbuf_addf(&man_page, "man:%s(1)", page);
300
		execlp(path, filename, "newTab", man_page.buf, (char *)NULL);
301
		warning_errno(_("failed to exec '%s'"), path);
302
		strbuf_release(&man_page);
303
	}
304
}
305

306
static void exec_man_man(const char *path, const char *page)
307
{
308
	if (!path)
309
		path = "man";
310
	execlp(path, "man", page, (char *)NULL);
311
	warning_errno(_("failed to exec '%s'"), path);
312
}
313

314
static void exec_man_cmd(const char *cmd, const char *page)
315
{
316
	struct strbuf shell_cmd = STRBUF_INIT;
317
	strbuf_addf(&shell_cmd, "%s %s", cmd, page);
318
	execl(SHELL_PATH, SHELL_PATH, "-c", shell_cmd.buf, (char *)NULL);
319
	warning(_("failed to exec '%s'"), cmd);
320
	strbuf_release(&shell_cmd);
321
}
322

323
static void add_man_viewer(const char *name)
324
{
325
	struct man_viewer_list **p = &man_viewer_list;
326

327
	while (*p)
328
		p = &((*p)->next);
329
	FLEX_ALLOC_STR(*p, name, name);
330
}
331

332
static int supported_man_viewer(const char *name, size_t len)
333
{
334
	return (!strncasecmp("man", name, len) ||
335
		!strncasecmp("woman", name, len) ||
336
		!strncasecmp("konqueror", name, len));
337
}
338

339
static void do_add_man_viewer_info(const char *name,
340
				   size_t len,
341
				   const char *value)
342
{
343
	struct man_viewer_info_list *new_man_viewer;
344
	FLEX_ALLOC_MEM(new_man_viewer, name, name, len);
345
	new_man_viewer->info = xstrdup(value);
346
	new_man_viewer->next = man_viewer_info_list;
347
	man_viewer_info_list = new_man_viewer;
348
}
349

350
static int add_man_viewer_path(const char *name,
351
			       size_t len,
352
			       const char *value)
353
{
354
	if (supported_man_viewer(name, len))
355
		do_add_man_viewer_info(name, len, value);
356
	else
357
		warning(_("'%s': path for unsupported man viewer.\n"
358
			  "Please consider using 'man.<tool>.cmd' instead."),
359
			name);
360

361
	return 0;
362
}
363

364
static int add_man_viewer_cmd(const char *name,
365
			      size_t len,
366
			      const char *value)
367
{
368
	if (supported_man_viewer(name, len))
369
		warning(_("'%s': cmd for supported man viewer.\n"
370
			  "Please consider using 'man.<tool>.path' instead."),
371
			name);
372
	else
373
		do_add_man_viewer_info(name, len, value);
374

375
	return 0;
376
}
377

378
static int add_man_viewer_info(const char *var, const char *value)
379
{
380
	const char *name, *subkey;
381
	size_t namelen;
382

383
	if (parse_config_key(var, "man", &name, &namelen, &subkey) < 0 || !name)
384
		return 0;
385

386
	if (!strcmp(subkey, "path")) {
387
		if (!value)
388
			return config_error_nonbool(var);
389
		return add_man_viewer_path(name, namelen, value);
390
	}
391
	if (!strcmp(subkey, "cmd")) {
392
		if (!value)
393
			return config_error_nonbool(var);
394
		return add_man_viewer_cmd(name, namelen, value);
395
	}
396

397
	return 0;
398
}
399

400
static int git_help_config(const char *var, const char *value,
401
			   const struct config_context *ctx, void *cb)
402
{
403
	if (!strcmp(var, "help.format")) {
404
		if (!value)
405
			return config_error_nonbool(var);
406
		help_format = parse_help_format(value);
407
		return 0;
408
	}
409
	if (!strcmp(var, "help.htmlpath")) {
410
		if (!value)
411
			return config_error_nonbool(var);
412
		html_path = xstrdup(value);
413
		return 0;
414
	}
415
	if (!strcmp(var, "man.viewer")) {
416
		if (!value)
417
			return config_error_nonbool(var);
418
		add_man_viewer(value);
419
		return 0;
420
	}
421
	if (starts_with(var, "man."))
422
		return add_man_viewer_info(var, value);
423

424
	return git_default_config(var, value, ctx, cb);
425
}
426

427
static struct cmdnames main_cmds, other_cmds;
428

429
static int is_git_command(const char *s)
430
{
431
	if (is_builtin(s))
432
		return 1;
433

434
	load_command_list("git-", &main_cmds, &other_cmds);
435
	return is_in_cmdlist(&main_cmds, s) ||
436
		is_in_cmdlist(&other_cmds, s);
437
}
438

439
static const char *cmd_to_page(const char *git_cmd)
440
{
441
	if (!git_cmd)
442
		return "git";
443
	else if (starts_with(git_cmd, "git"))
444
		return git_cmd;
445
	else if (is_git_command(git_cmd))
446
		return xstrfmt("git-%s", git_cmd);
447
	else if (!strcmp("scalar", git_cmd))
448
		return xstrdup(git_cmd);
449
	else
450
		return xstrfmt("git%s", git_cmd);
451
}
452

453
static void setup_man_path(void)
454
{
455
	struct strbuf new_path = STRBUF_INIT;
456
	const char *old_path = getenv("MANPATH");
457
	char *git_man_path = system_path(GIT_MAN_PATH);
458

459
	/* We should always put ':' after our path. If there is no
460
	 * old_path, the ':' at the end will let 'man' to try
461
	 * system-wide paths after ours to find the manual page. If
462
	 * there is old_path, we need ':' as delimiter. */
463
	strbuf_addstr(&new_path, git_man_path);
464
	strbuf_addch(&new_path, ':');
465
	if (old_path)
466
		strbuf_addstr(&new_path, old_path);
467

468
	free(git_man_path);
469
	setenv("MANPATH", new_path.buf, 1);
470

471
	strbuf_release(&new_path);
472
}
473

474
static void exec_viewer(const char *name, const char *page)
475
{
476
	const char *info = get_man_viewer_info(name);
477

478
	if (!strcasecmp(name, "man"))
479
		exec_man_man(info, page);
480
	else if (!strcasecmp(name, "woman"))
481
		exec_woman_emacs(info, page);
482
	else if (!strcasecmp(name, "konqueror"))
483
		exec_man_konqueror(info, page);
484
	else if (info)
485
		exec_man_cmd(info, page);
486
	else
487
		warning(_("'%s': unknown man viewer."), name);
488
}
489

490
static void show_man_page(const char *page)
491
{
492
	struct man_viewer_list *viewer;
493
	const char *fallback = getenv("GIT_MAN_VIEWER");
494

495
	setup_man_path();
496
	for (viewer = man_viewer_list; viewer; viewer = viewer->next)
497
	{
498
		exec_viewer(viewer->name, page); /* will return when unable */
499
	}
500
	if (fallback)
501
		exec_viewer(fallback, page);
502
	exec_viewer("man", page);
503
	die(_("no man viewer handled the request"));
504
}
505

506
static void show_info_page(const char *page)
507
{
508
	setenv("INFOPATH", system_path(GIT_INFO_PATH), 1);
509
	execlp("info", "info", "gitman", page, (char *)NULL);
510
	die(_("no info viewer handled the request"));
511
}
512

513
static void get_html_page_path(struct strbuf *page_path, const char *page)
514
{
515
	struct stat st;
516
	char *to_free = NULL;
517

518
	if (!html_path)
519
		html_path = to_free = system_path(GIT_HTML_PATH);
520

521
	/*
522
	 * Check that the page we're looking for exists.
523
	 */
524
	if (!strstr(html_path, "://")) {
525
		if (stat(mkpath("%s/%s.html", html_path, page), &st)
526
		    || !S_ISREG(st.st_mode))
527
			die("'%s/%s.html': documentation file not found.",
528
				html_path, page);
529
	}
530

531
	strbuf_init(page_path, 0);
532
	strbuf_addf(page_path, "%s/%s.html", html_path, page);
533
	free(to_free);
534
}
535

536
static void open_html(const char *path)
537
{
538
	execl_git_cmd("web--browse", "-c", "help.browser", path, (char *)NULL);
539
}
540

541
static void show_html_page(const char *page)
542
{
543
	struct strbuf page_path; /* it leaks but we exec bellow */
544

545
	get_html_page_path(&page_path, page);
546

547
	open_html(page_path.buf);
548
}
549

550
static const char *check_git_cmd(const char* cmd)
551
{
552
	char *alias;
553

554
	if (is_git_command(cmd))
555
		return cmd;
556

557
	alias = alias_lookup(cmd);
558
	if (alias) {
559
		const char **argv;
560
		int count;
561

562
		/*
563
		 * handle_builtin() in git.c rewrites "git cmd --help"
564
		 * to "git help --exclude-guides cmd", so we can use
565
		 * exclude_guides to distinguish "git cmd --help" from
566
		 * "git help cmd". In the latter case, or if cmd is an
567
		 * alias for a shell command, just print the alias
568
		 * definition.
569
		 */
570
		if (!exclude_guides || alias[0] == '!') {
571
			printf_ln(_("'%s' is aliased to '%s'"), cmd, alias);
572
			free(alias);
573
			exit(0);
574
		}
575
		/*
576
		 * Otherwise, we pretend that the command was "git
577
		 * word0 --help". We use split_cmdline() to get the
578
		 * first word of the alias, to ensure that we use the
579
		 * same rules as when the alias is actually
580
		 * used. split_cmdline() modifies alias in-place.
581
		 */
582
		fprintf_ln(stderr, _("'%s' is aliased to '%s'"), cmd, alias);
583
		count = split_cmdline(alias, &argv);
584
		if (count < 0)
585
			die(_("bad alias.%s string: %s"), cmd,
586
			    split_cmdline_strerror(count));
587
		free(argv);
588
		UNLEAK(alias);
589
		return alias;
590
	}
591

592
	if (exclude_guides)
593
		return help_unknown_cmd(cmd);
594

595
	return cmd;
596
}
597

598
static void no_help_format(const char *opt_mode, enum help_format fmt)
599
{
600
	const char *opt_fmt;
601

602
	switch (fmt) {
603
	case HELP_FORMAT_NONE:
604
		return;
605
	case HELP_FORMAT_MAN:
606
		opt_fmt = "--man";
607
		break;
608
	case HELP_FORMAT_INFO:
609
		opt_fmt = "--info";
610
		break;
611
	case HELP_FORMAT_WEB:
612
		opt_fmt = "--web";
613
		break;
614
	default:
615
		BUG("unreachable");
616
	}
617

618
	usage_msg_optf(_("options '%s' and '%s' cannot be used together"),
619
		       builtin_help_usage, builtin_help_options, opt_mode,
620
		       opt_fmt);
621
}
622

623
static void opt_mode_usage(int argc, const char *opt_mode,
624
			   enum help_format fmt)
625
{
626
	if (argc)
627
		usage_msg_optf(_("the '%s' option doesn't take any non-option arguments"),
628
			       builtin_help_usage, builtin_help_options,
629
			       opt_mode);
630

631
	no_help_format(opt_mode, fmt);
632
}
633

634
int cmd_help(int argc, const char **argv, const char *prefix)
635
{
636
	int nongit;
637
	enum help_format parsed_help_format;
638
	const char *page;
639

640
	argc = parse_options(argc, argv, prefix, builtin_help_options,
641
			builtin_help_usage, 0);
642
	parsed_help_format = help_format;
643

644
	if (cmd_mode != HELP_ACTION_ALL &&
645
	    (show_external_commands >= 0 ||
646
	     show_aliases >= 0))
647
		usage_msg_opt(_("the '--no-[external-commands|aliases]' options can only be used with '--all'"),
648
			      builtin_help_usage, builtin_help_options);
649

650
	switch (cmd_mode) {
651
	case HELP_ACTION_ALL:
652
		opt_mode_usage(argc, "--all", help_format);
653
		if (verbose) {
654
			setup_pager();
655
			list_all_cmds_help(show_external_commands,
656
					   show_aliases);
657
			return 0;
658
		}
659
		printf(_("usage: %s%s"), _(git_usage_string), "\n\n");
660
		load_command_list("git-", &main_cmds, &other_cmds);
661
		list_commands(&main_cmds, &other_cmds);
662
		printf("%s\n", _(git_more_info_string));
663
		break;
664
	case HELP_ACTION_GUIDES:
665
		opt_mode_usage(argc, "--guides", help_format);
666
		list_guides_help();
667
		printf("%s\n", _(git_more_info_string));
668
		return 0;
669
	case HELP_ACTION_CONFIG_FOR_COMPLETION:
670
		opt_mode_usage(argc, "--config-for-completion", help_format);
671
		list_config_help(SHOW_CONFIG_VARS);
672
		return 0;
673
	case HELP_ACTION_USER_INTERFACES:
674
		opt_mode_usage(argc, "--user-interfaces", help_format);
675
		list_user_interfaces_help();
676
		return 0;
677
	case HELP_ACTION_DEVELOPER_INTERFACES:
678
		opt_mode_usage(argc, "--developer-interfaces", help_format);
679
		list_developer_interfaces_help();
680
		return 0;
681
	case HELP_ACTION_CONFIG_SECTIONS_FOR_COMPLETION:
682
		opt_mode_usage(argc, "--config-sections-for-completion",
683
			       help_format);
684
		list_config_help(SHOW_CONFIG_SECTIONS);
685
		return 0;
686
	case HELP_ACTION_CONFIG:
687
		opt_mode_usage(argc, "--config", help_format);
688
		setup_pager();
689
		list_config_help(SHOW_CONFIG_HUMAN);
690
		printf("\n%s\n", _("'git help config' for more information"));
691
		return 0;
692
	}
693

694
	if (!argv[0]) {
695
		printf(_("usage: %s%s"), _(git_usage_string), "\n\n");
696
		list_common_cmds_help();
697
		printf("\n%s\n", _(git_more_info_string));
698
		return 0;
699
	}
700

701
	setup_git_directory_gently(&nongit);
702
	git_config(git_help_config, NULL);
703

704
	if (parsed_help_format != HELP_FORMAT_NONE)
705
		help_format = parsed_help_format;
706
	if (help_format == HELP_FORMAT_NONE)
707
		help_format = parse_help_format(DEFAULT_HELP_FORMAT);
708

709
	argv[0] = check_git_cmd(argv[0]);
710

711
	page = cmd_to_page(argv[0]);
712
	switch (help_format) {
713
	case HELP_FORMAT_NONE:
714
	case HELP_FORMAT_MAN:
715
		show_man_page(page);
716
		break;
717
	case HELP_FORMAT_INFO:
718
		show_info_page(page);
719
		break;
720
	case HELP_FORMAT_WEB:
721
		show_html_page(page);
722
		break;
723
	}
724

725
	return 0;
726
}
727