[thirdparty/git.git] / help.c

/*
 * builtin-help.c
 *
 * Builtin help-related commands (help, usage, version)
 */
#include "cache.h"
#include "builtin.h"
#include "exec_cmd.h"
#include "common-cmds.h"
#include "parse-options.h"

enum help_format {
	HELP_FORMAT_MAN,
	HELP_FORMAT_INFO,
	HELP_FORMAT_WEB,
};

static int show_all = 0;
static enum help_format help_format = HELP_FORMAT_MAN;
static struct option builtin_help_options[] = {
	OPT_BOOLEAN('a', "all", &show_all, "print all available commands"),
	OPT_SET_INT('m', "man", &help_format, "show man page", HELP_FORMAT_MAN),
	OPT_SET_INT('w', "web", &help_format, "show manual in web browser",
			HELP_FORMAT_WEB),
	OPT_SET_INT('i', "info", &help_format, "show info page",
			HELP_FORMAT_INFO),
};

static const char * const builtin_help_usage[] = {
	"git-help [--all] [--man|--web|--info] [command]",
	NULL
};

static enum help_format parse_help_format(const char *format)
{
	if (!strcmp(format, "man"))
		return HELP_FORMAT_MAN;
	if (!strcmp(format, "info"))
		return HELP_FORMAT_INFO;
	if (!strcmp(format, "web") || !strcmp(format, "html"))
		return HELP_FORMAT_WEB;
	die("unrecognized help format '%s'", format);
}

static int git_help_config(const char *var, const char *value)
{
	if (!strcmp(var, "help.format")) {
		if (!value)
			return config_error_nonbool(var);
		help_format = parse_help_format(value);
		return 0;
	}
	return git_default_config(var, value);
}

/* most GUI terminals set COLUMNS (although some don't export it) */
static int term_columns(void)
{
	char *col_string = getenv("COLUMNS");
	int n_cols;

	if (col_string && (n_cols = atoi(col_string)) > 0)
		return n_cols;

#ifdef TIOCGWINSZ
	{
		struct winsize ws;
		if (!ioctl(1, TIOCGWINSZ, &ws)) {
			if (ws.ws_col)
				return ws.ws_col;
		}
	}
#endif

	return 80;
}

static inline void mput_char(char c, unsigned int num)
{
	while(num--)
		putchar(c);
}

static struct cmdnames {
	int alloc;
	int cnt;
	struct cmdname {
		size_t len;
		char name[1];
	} **names;
} main_cmds, other_cmds;

static void add_cmdname(struct cmdnames *cmds, const char *name, int len)
{
	struct cmdname *ent = xmalloc(sizeof(*ent) + len);

	ent->len = len;
	memcpy(ent->name, name, len);
	ent->name[len] = 0;

	ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc);
	cmds->names[cmds->cnt++] = ent;
}

static int cmdname_compare(const void *a_, const void *b_)
{
	struct cmdname *a = *(struct cmdname **)a_;
	struct cmdname *b = *(struct cmdname **)b_;
	return strcmp(a->name, b->name);
}

static void uniq(struct cmdnames *cmds)
{
	int i, j;

	if (!cmds->cnt)
		return;

	for (i = j = 1; i < cmds->cnt; i++)
		if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name))
			cmds->names[j++] = cmds->names[i];

	cmds->cnt = j;
}

static void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes)
{
	int ci, cj, ei;
	int cmp;

	ci = cj = ei = 0;
	while (ci < cmds->cnt && ei < excludes->cnt) {
		cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);
		if (cmp < 0)
			cmds->names[cj++] = cmds->names[ci++];
		else if (cmp == 0)
			ci++, ei++;
		else if (cmp > 0)
			ei++;
	}

	while (ci < cmds->cnt)
		cmds->names[cj++] = cmds->names[ci++];

	cmds->cnt = cj;
}

static void pretty_print_string_list(struct cmdnames *cmds, int longest)
{
	int cols = 1, rows;
	int space = longest + 1; /* min 1 SP between words */
	int max_cols = term_columns() - 1; /* don't print *on* the edge */
	int i, j;

	if (space < max_cols)
		cols = max_cols / space;
	rows = (cmds->cnt + cols - 1) / cols;

	for (i = 0; i < rows; i++) {
		printf("  ");

		for (j = 0; j < cols; j++) {
			int n = j * rows + i;
			int size = space;
			if (n >= cmds->cnt)
				break;
			if (j == cols-1 || n + rows >= cmds->cnt)
				size = 1;
			printf("%-*s", size, cmds->names[n]->name);
		}
		putchar('\n');
	}
}

static unsigned int list_commands_in_dir(struct cmdnames *cmds,
					 const char *path)
{
	unsigned int longest = 0;
	const char *prefix = "git-";
	int prefix_len = strlen(prefix);
	DIR *dir = opendir(path);
	struct dirent *de;

	if (!dir || chdir(path))
		return 0;

	while ((de = readdir(dir)) != NULL) {
		struct stat st;
		int entlen;

		if (prefixcmp(de->d_name, prefix))
			continue;

		if (stat(de->d_name, &st) || /* stat, not lstat */
		    !S_ISREG(st.st_mode) ||
		    !(st.st_mode & S_IXUSR))
			continue;

		entlen = strlen(de->d_name) - prefix_len;
		if (has_extension(de->d_name, ".exe"))
			entlen -= 4;

		if (longest < entlen)
			longest = entlen;

		add_cmdname(cmds, de->d_name + prefix_len, entlen);
	}
	closedir(dir);

	return longest;
}

static unsigned int load_command_list(void)
{
	unsigned int longest = 0;
	unsigned int len;
	const char *env_path = getenv("PATH");
	char *paths, *path, *colon;
	const char *exec_path = git_exec_path();

	if (exec_path)
		longest = list_commands_in_dir(&main_cmds, exec_path);

	if (!env_path) {
		fprintf(stderr, "PATH not set\n");
		exit(1);
	}

	path = paths = xstrdup(env_path);
	while (1) {
		if ((colon = strchr(path, ':')))
			*colon = 0;

		len = list_commands_in_dir(&other_cmds, path);
		if (len > longest)
			longest = len;

		if (!colon)
			break;
		path = colon + 1;
	}
	free(paths);

	qsort(main_cmds.names, main_cmds.cnt,
	      sizeof(*main_cmds.names), cmdname_compare);
	uniq(&main_cmds);

	qsort(other_cmds.names, other_cmds.cnt,
	      sizeof(*other_cmds.names), cmdname_compare);
	uniq(&other_cmds);
	exclude_cmds(&other_cmds, &main_cmds);

	return longest;
}

static void list_commands(void)
{
	unsigned int longest = load_command_list();
	const char *exec_path = git_exec_path();

	if (main_cmds.cnt) {
		printf("available git commands in '%s'\n", exec_path);
		printf("----------------------------");
		mput_char('-', strlen(exec_path));
		putchar('\n');
		pretty_print_string_list(&main_cmds, longest);
		putchar('\n');
	}

	if (other_cmds.cnt) {
		printf("git commands available from elsewhere on your $PATH\n");
		printf("---------------------------------------------------\n");
		pretty_print_string_list(&other_cmds, longest);
		putchar('\n');
	}
}

void list_common_cmds_help(void)
{
	int i, longest = 0;

	for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
		if (longest < strlen(common_cmds[i].name))
			longest = strlen(common_cmds[i].name);
	}

	puts("The most commonly used git commands are:");
	for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
		printf("   %s   ", common_cmds[i].name);
		mput_char(' ', longest - strlen(common_cmds[i].name));
		puts(common_cmds[i].help);
	}
}

static int is_in_cmdlist(struct cmdnames *c, const char *s)
{
	int i;
	for (i = 0; i < c->cnt; i++)
		if (!strcmp(s, c->names[i]->name))
			return 1;
	return 0;
}

static int is_git_command(const char *s)
{
	load_command_list();
	return is_in_cmdlist(&main_cmds, s) ||
		is_in_cmdlist(&other_cmds, s);
}

static const char *cmd_to_page(const char *git_cmd)
{
	if (!git_cmd)
		return "git";
	else if (!prefixcmp(git_cmd, "git"))
		return git_cmd;
	else {
		int page_len = strlen(git_cmd) + 4;
		char *p = xmalloc(page_len + 1);
		strcpy(p, "git-");
		strcpy(p + 4, git_cmd);
		p[page_len] = 0;
		return p;
	}
}

static void setup_man_path(void)
{
	struct strbuf new_path;
	const char *old_path = getenv("MANPATH");

	strbuf_init(&new_path, 0);

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

	setenv("MANPATH", new_path.buf, 1);

	strbuf_release(&new_path);
}

static void show_man_page(const char *git_cmd)
{
	const char *page = cmd_to_page(git_cmd);
	setup_man_path();
	execlp("man", "man", page, NULL);
}

static void show_info_page(const char *git_cmd)
{
	const char *page = cmd_to_page(git_cmd);
	setenv("INFOPATH", GIT_INFO_PATH, 1);
	execlp("info", "info", "gitman", page, NULL);
}

static void get_html_page_path(struct strbuf *page_path, const char *page)
{
	struct stat st;

	/* Check that we have a git documentation directory. */
	if (stat(GIT_HTML_PATH "/git.html", &st) || !S_ISREG(st.st_mode))
		die("'%s': not a documentation directory.", GIT_HTML_PATH);

	strbuf_init(page_path, 0);
	strbuf_addf(page_path, GIT_HTML_PATH "/%s.html", page);
}

static void show_html_page(const char *git_cmd)
{
	const char *page = cmd_to_page(git_cmd);
	struct strbuf page_path; /* it leaks but we exec bellow */

	get_html_page_path(&page_path, page);

	execl_git_cmd("web--browse", "-c", "help.browser", page_path.buf, NULL);
}

void help_unknown_cmd(const char *cmd)
{
	fprintf(stderr, "git: '%s' is not a git-command. See 'git --help'.\n", cmd);
	exit(1);
}

int cmd_version(int argc, const char **argv, const char *prefix)
{
	printf("git version %s\n", git_version_string);
	return 0;
}

int cmd_help(int argc, const char **argv, const char *prefix)
{
	int nongit;
	const char *alias;

	setup_git_directory_gently(&nongit);
	git_config(git_help_config);

	argc = parse_options(argc, argv, builtin_help_options,
			builtin_help_usage, 0);

	if (show_all) {
		printf("usage: %s\n\n", git_usage_string);
		list_commands();
		return 0;
	}

	if (!argv[0]) {
		printf("usage: %s\n\n", git_usage_string);
		list_common_cmds_help();
		return 0;
	}

	alias = alias_lookup(argv[0]);
	if (alias && !is_git_command(argv[0])) {
		printf("`git %s' is aliased to `%s'\n", argv[0], alias);
		return 0;
	}

	switch (help_format) {
	case HELP_FORMAT_MAN:
		show_man_page(argv[0]);
		break;
	case HELP_FORMAT_INFO:
		show_info_page(argv[0]);
		break;
	case HELP_FORMAT_WEB:
		show_html_page(argv[0]);
		break;
	}

	return 0;
}
Commit	Line	Data
70827b15 LT	1	/*
	2	* builtin-help.c
	3	*
	4	* Builtin help-related commands (help, usage, version)
	5	*/
	6	#include "cache.h"
	7	#include "builtin.h"
	8	#include "exec_cmd.h"
	9	#include "common-cmds.h"
41eb33bd JK	10	#include "parse-options.h"
	11
	12	enum help_format {
	13	HELP_FORMAT_MAN,
	14	HELP_FORMAT_INFO,
	15	HELP_FORMAT_WEB,
	16	};
	17
	18	static int show_all = 0;
	19	static enum help_format help_format = HELP_FORMAT_MAN;
	20	static struct option builtin_help_options[] = {
	21	OPT_BOOLEAN('a', "all", &show_all, "print all available commands"),
	22	OPT_SET_INT('m', "man", &help_format, "show man page", HELP_FORMAT_MAN),
	23	OPT_SET_INT('w', "web", &help_format, "show manual in web browser",
	24	HELP_FORMAT_WEB),
	25	OPT_SET_INT('i', "info", &help_format, "show info page",
	26	HELP_FORMAT_INFO),
	27	};
	28
	29	static const char * const builtin_help_usage[] = {
	30	"git-help [--all] [--man\|--web\|--info] [command]",
	31	NULL
	32	};
	33
	34	static enum help_format parse_help_format(const char *format)
70087cdb	35	{
41eb33bd JK	36	if (!strcmp(format, "man"))
	37	return HELP_FORMAT_MAN;
	38	if (!strcmp(format, "info"))
	39	return HELP_FORMAT_INFO;
	40	if (!strcmp(format, "web") \|\| !strcmp(format, "html"))
	41	return HELP_FORMAT_WEB;
70087cdb CC	42	die("unrecognized help format '%s'", format);
	43	}
	44
	45	static int git_help_config(const char var, const char value)
	46	{
41eb33bd JK	47	if (!strcmp(var, "help.format")) {
	48	if (!value)
	49	return config_error_nonbool(var);
	50	help_format = parse_help_format(value);
	51	return 0;
	52	}
70087cdb CC	53	return git_default_config(var, value);
	54	}
	55
82e5a82f	56	/* most GUI terminals set COLUMNS (although some don't export it) */
70827b15 LT	57	static int term_columns(void)
	58	{
	59	char *col_string = getenv("COLUMNS");
96f1e58f	60	int n_cols;
70827b15 LT	61
	62	if (col_string && (n_cols = atoi(col_string)) > 0)
	63	return n_cols;
	64
	65	#ifdef TIOCGWINSZ
	66	{
	67	struct winsize ws;
	68	if (!ioctl(1, TIOCGWINSZ, &ws)) {
	69	if (ws.ws_col)
	70	return ws.ws_col;
	71	}
	72	}
	73	#endif
	74
	75	return 80;
	76	}
	77
70827b15 LT	78	static inline void mput_char(char c, unsigned int num)
	79	{
	80	while(num--)
	81	putchar(c);
	82	}
	83
1eb05690 SP	84	static struct cmdnames {
	85	int alloc;
	86	int cnt;
	87	struct cmdname {
	88	size_t len;
	89	char name[1];
	90	} **names;
	91	} main_cmds, other_cmds;
	92
	93	static void add_cmdname(struct cmdnames cmds, const char name, int len)
70827b15	94	{
1eb05690 SP	95	struct cmdname ent = xmalloc(sizeof(ent) + len);
1eb05690 SP	96
70827b15 LT	97	ent->len = len;
	98	memcpy(ent->name, name, len);
	99	ent->name[len] = 0;
1eb05690 SP	100
	101	ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc);
	102	cmds->names[cmds->cnt++] = ent;
70827b15 LT	103	}
	104
	105	static int cmdname_compare(const void a_, const void b_)
	106	{
	107	struct cmdname a = (struct cmdname **)a_;
	108	struct cmdname b = (struct cmdname **)b_;
	109	return strcmp(a->name, b->name);
	110	}
	111
1eb05690 SP	112	static void uniq(struct cmdnames *cmds)
	113	{
	114	int i, j;
	115
	116	if (!cmds->cnt)
	117	return;
	118
	119	for (i = j = 1; i < cmds->cnt; i++)
	120	if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name))
	121	cmds->names[j++] = cmds->names[i];
	122
	123	cmds->cnt = j;
	124	}
	125
f3fa1838 JH	126	static void exclude_cmds(struct cmdnames cmds, struct cmdnames excludes)
f3fa1838 JH	127	{
1eb05690 SP	128	int ci, cj, ei;
	129	int cmp;
	130
	131	ci = cj = ei = 0;
	132	while (ci < cmds->cnt && ei < excludes->cnt) {
	133	cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);
	134	if (cmp < 0)
	135	cmds->names[cj++] = cmds->names[ci++];
	136	else if (cmp == 0)
	137	ci++, ei++;
	138	else if (cmp > 0)
	139	ei++;
	140	}
	141
	142	while (ci < cmds->cnt)
	143	cmds->names[cj++] = cmds->names[ci++];
	144
	145	cmds->cnt = cj;
	146	}
	147
	148	static void pretty_print_string_list(struct cmdnames *cmds, int longest)
70827b15 LT	149	{
	150	int cols = 1, rows;
	151	int space = longest + 1; /* min 1 SP between words */
	152	int max_cols = term_columns() - 1; /* don't print on the edge */
	153	int i, j;
	154
	155	if (space < max_cols)
	156	cols = max_cols / space;
1eb05690	157	rows = (cmds->cnt + cols - 1) / cols;
70827b15 LT	158
	159	for (i = 0; i < rows; i++) {
	160	printf(" ");
	161
	162	for (j = 0; j < cols; j++) {
	163	int n = j * rows + i;
	164	int size = space;
1eb05690	165	if (n >= cmds->cnt)
70827b15	166	break;
1eb05690	167	if (j == cols-1 \|\| n + rows >= cmds->cnt)
70827b15	168	size = 1;
1eb05690	169	printf("%-*s", size, cmds->names[n]->name);
70827b15 LT	170	}
	171	putchar('\n');
	172	}
	173	}
	174
1eb05690 SP	175	static unsigned int list_commands_in_dir(struct cmdnames *cmds,
1eb05690 SP	176	const char *path)
70827b15 LT	177	{
70827b15 LT	178	unsigned int longest = 0;
edb6ddc5 SP	179	const char *prefix = "git-";
edb6ddc5 SP	180	int prefix_len = strlen(prefix);
1eb05690	181	DIR *dir = opendir(path);
70827b15 LT	182	struct dirent *de;
70827b15 LT	183
1eb05690 SP	184	if (!dir \|\| chdir(path))
1eb05690 SP	185	return 0;
70827b15	186
70827b15 LT	187	while ((de = readdir(dir)) != NULL) {
	188	struct stat st;
	189	int entlen;
	190
edb6ddc5	191	if (prefixcmp(de->d_name, prefix))
70827b15	192	continue;
0966003c SP	193
0966003c SP	194	if (stat(de->d_name, &st) \|\| /* stat, not lstat */
70827b15 LT	195	!S_ISREG(st.st_mode) \|\|
	196	!(st.st_mode & S_IXUSR))
	197	continue;
	198
edb6ddc5	199	entlen = strlen(de->d_name) - prefix_len;
5bb1cda5	200	if (has_extension(de->d_name, ".exe"))
70827b15 LT	201	entlen -= 4;
	202
	203	if (longest < entlen)
	204	longest = entlen;
	205
1eb05690	206	add_cmdname(cmds, de->d_name + prefix_len, entlen);
70827b15 LT	207	}
	208	closedir(dir);
	209
1eb05690 SP	210	return longest;
	211	}
	212
2156435f	213	static unsigned int load_command_list(void)
1eb05690 SP	214	{
	215	unsigned int longest = 0;
	216	unsigned int len;
	217	const char *env_path = getenv("PATH");
	218	char paths, path, *colon;
	219	const char *exec_path = git_exec_path();
	220
	221	if (exec_path)
	222	longest = list_commands_in_dir(&main_cmds, exec_path);
	223
	224	if (!env_path) {
	225	fprintf(stderr, "PATH not set\n");
	226	exit(1);
	227	}
	228
	229	path = paths = xstrdup(env_path);
	230	while (1) {
	231	if ((colon = strchr(path, ':')))
	232	*colon = 0;
	233
	234	len = list_commands_in_dir(&other_cmds, path);
	235	if (len > longest)
	236	longest = len;
	237
	238	if (!colon)
	239	break;
	240	path = colon + 1;
	241	}
	242	free(paths);
	243
	244	qsort(main_cmds.names, main_cmds.cnt,
	245	sizeof(*main_cmds.names), cmdname_compare);
	246	uniq(&main_cmds);
	247
	248	qsort(other_cmds.names, other_cmds.cnt,
	249	sizeof(*other_cmds.names), cmdname_compare);
	250	uniq(&other_cmds);
	251	exclude_cmds(&other_cmds, &main_cmds);
	252
2156435f JK	253	return longest;
	254	}
	255
	256	static void list_commands(void)
	257	{
	258	unsigned int longest = load_command_list();
	259	const char *exec_path = git_exec_path();
	260
1eb05690 SP	261	if (main_cmds.cnt) {
	262	printf("available git commands in '%s'\n", exec_path);
	263	printf("----------------------------");
	264	mput_char('-', strlen(exec_path));
	265	putchar('\n');
	266	pretty_print_string_list(&main_cmds, longest);
	267	putchar('\n');
	268	}
	269
	270	if (other_cmds.cnt) {
	271	printf("git commands available from elsewhere on your $PATH\n");
	272	printf("---------------------------------------------------\n");
	273	pretty_print_string_list(&other_cmds, longest);
	274	putchar('\n');
	275	}
70827b15 LT	276	}
70827b15 LT	277
3d7e2d85	278	void list_common_cmds_help(void)
70827b15 LT	279	{
	280	int i, longest = 0;
	281
	282	for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
	283	if (longest < strlen(common_cmds[i].name))
	284	longest = strlen(common_cmds[i].name);
	285	}
	286
	287	puts("The most commonly used git commands are:");
	288	for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
4f75b115 RS	289	printf(" %s ", common_cmds[i].name);
4f75b115 RS	290	mput_char(' ', longest - strlen(common_cmds[i].name));
70827b15 LT	291	puts(common_cmds[i].help);
70827b15 LT	292	}
70827b15 LT	293	}
70827b15 LT	294
2156435f JK	295	static int is_in_cmdlist(struct cmdnames c, const char s)
	296	{
	297	int i;
	298	for (i = 0; i < c->cnt; i++)
	299	if (!strcmp(s, c->names[i]->name))
	300	return 1;
	301	return 0;
	302	}
	303
	304	static int is_git_command(const char *s)
	305	{
	306	load_command_list();
	307	return is_in_cmdlist(&main_cmds, s) \|\|
	308	is_in_cmdlist(&other_cmds, s);
	309	}
	310
df55c9cb	311	static const char cmd_to_page(const char git_cmd)
70827b15	312	{
5d6491c7 CC	313	if (!git_cmd)
	314	return "git";
	315	else if (!prefixcmp(git_cmd, "git"))
df55c9cb	316	return git_cmd;
70827b15 LT	317	else {
70827b15 LT	318	int page_len = strlen(git_cmd) + 4;
2d7320d0	319	char *p = xmalloc(page_len + 1);
70827b15 LT	320	strcpy(p, "git-");
	321	strcpy(p + 4, git_cmd);
	322	p[page_len] = 0;
df55c9cb	323	return p;
70827b15	324	}
df55c9cb	325	}
70827b15	326
8e566f24 SO	327	static void setup_man_path(void)
	328	{
	329	struct strbuf new_path;
	330	const char *old_path = getenv("MANPATH");
	331
	332	strbuf_init(&new_path, 0);
	333
	334	/* We should always put ':' after our path. If there is no
	335	* old_path, the ':' at the end will let 'man' to try
	336	* system-wide paths after ours to find the manual page. If
	337	* there is old_path, we need ':' as delimiter. */
	338	strbuf_addstr(&new_path, GIT_MAN_PATH);
	339	strbuf_addch(&new_path, ':');
	340	if (old_path)
	341	strbuf_addstr(&new_path, old_path);
	342
	343	setenv("MANPATH", new_path.buf, 1);
	344
	345	strbuf_release(&new_path);
	346	}
	347
df55c9cb CC	348	static void show_man_page(const char *git_cmd)
	349	{
	350	const char *page = cmd_to_page(git_cmd);
8e566f24	351	setup_man_path();
70827b15 LT	352	execlp("man", "man", page, NULL);
	353	}
	354
df55c9cb CC	355	static void show_info_page(const char *git_cmd)
	356	{
	357	const char *page = cmd_to_page(git_cmd);
a149a1a4	358	setenv("INFOPATH", GIT_INFO_PATH, 1);
78d39f98	359	execlp("info", "info", "gitman", page, NULL);
df55c9cb CC	360	}
df55c9cb CC	361
482cce82 CC	362	static void get_html_page_path(struct strbuf page_path, const char page)
	363	{
	364	struct stat st;
	365
	366	/* Check that we have a git documentation directory. */
	367	if (stat(GIT_HTML_PATH "/git.html", &st) \|\| !S_ISREG(st.st_mode))
	368	die("'%s': not a documentation directory.", GIT_HTML_PATH);
	369
	370	strbuf_init(page_path, 0);
	371	strbuf_addf(page_path, GIT_HTML_PATH "/%s.html", page);
	372	}
	373
5d6491c7 CC	374	static void show_html_page(const char *git_cmd)
	375	{
	376	const char *page = cmd_to_page(git_cmd);
482cce82 CC	377	struct strbuf page_path; /* it leaks but we exec bellow */
	378
	379	get_html_page_path(&page_path, page);
	380
5884f1fe	381	execl_git_cmd("web--browse", "-c", "help.browser", page_path.buf, NULL);
5d6491c7 CC	382	}
5d6491c7 CC	383
822a7d50 RJ	384	void help_unknown_cmd(const char *cmd)
822a7d50 RJ	385	{
a238917b	386	fprintf(stderr, "git: '%s' is not a git-command. See 'git --help'.\n", cmd);
822a7d50 RJ	387	exit(1);
	388	}
	389
a633fca0	390	int cmd_version(int argc, const char *argv, const char prefix)
70827b15 LT	391	{
	392	printf("git version %s\n", git_version_string);
	393	return 0;
	394	}
	395
5d6491c7	396	int cmd_help(int argc, const char *argv, const char prefix)
70827b15	397	{
41eb33bd	398	int nongit;
2156435f	399	const char *alias;
5d6491c7	400
41eb33bd JK	401	setup_git_directory_gently(&nongit);
41eb33bd JK	402	git_config(git_help_config);
822a7d50	403
41eb33bd JK	404	argc = parse_options(argc, argv, builtin_help_options,
	405	builtin_help_usage, 0);
	406
	407	if (show_all) {
822a7d50	408	printf("usage: %s\n\n", git_usage_string);
1eb05690	409	list_commands();
41eb33bd	410	return 0;
822a7d50	411	}
df55c9cb	412
41eb33bd JK	413	if (!argv[0]) {
	414	printf("usage: %s\n\n", git_usage_string);
	415	list_common_cmds_help();
	416	return 0;
70087cdb CC	417	}
70087cdb CC	418
2156435f JK	419	alias = alias_lookup(argv[0]);
	420	if (alias && !is_git_command(argv[0])) {
	421	printf("`git %s' is aliased to `%s'\n", argv[0], alias);
	422	return 0;
	423	}
	424
41eb33bd JK	425	switch (help_format) {
	426	case HELP_FORMAT_MAN:
	427	show_man_page(argv[0]);
	428	break;
	429	case HELP_FORMAT_INFO:
	430	show_info_page(argv[0]);
	431	break;
	432	case HELP_FORMAT_WEB:
	433	show_html_page(argv[0]);
	434	break;
70087cdb	435	}
822a7d50	436
70827b15 LT	437	return 0;
70827b15 LT	438	}