[thirdparty/git.git] / git.c

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include "git-compat-util.h"
#include "exec_cmd.h"
#include "cache.h"
#include "quote.h"

#include "builtin.h"

static void prepend_to_path(const char *dir, int len)
{
	const char *old_path = getenv("PATH");
	char *path;
	int path_len = len;

	if (!old_path)
		old_path = "/usr/local/bin:/usr/bin:/bin";

	path_len = len + strlen(old_path) + 1;

	path = malloc(path_len + 1);

	memcpy(path, dir, len);
	path[len] = ':';
	memcpy(path + len + 1, old_path, path_len - len);

	setenv("PATH", path, 1);
}

static int handle_options(const char*** argv, int* argc)
{
	int handled = 0;

	while (*argc > 0) {
		const char *cmd = (*argv)[0];
		if (cmd[0] != '-')
			break;

		/*
		 * For legacy reasons, the "version" and "help"
		 * commands can be written with "--" prepended
		 * to make them look like flags.
		 */
		if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
			break;

		/*
		 * Check remaining flags.
		 */
		if (!strncmp(cmd, "--exec-path", 11)) {
			cmd += 11;
			if (*cmd == '=')
				git_set_exec_path(cmd + 1);
			else {
				puts(git_exec_path());
				exit(0);
			}
		} else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
			setup_pager();
		} else if (!strcmp(cmd, "--git-dir")) {
			if (*argc < 1)
				return -1;
			setenv("GIT_DIR", (*argv)[1], 1);
			(*argv)++;
			(*argc)--;
		} else if (!strncmp(cmd, "--git-dir=", 10)) {
			setenv("GIT_DIR", cmd + 10, 1);
		} else if (!strcmp(cmd, "--bare")) {
			static char git_dir[1024];
			setenv("GIT_DIR", getcwd(git_dir, 1024), 1);
		} else {
			fprintf(stderr, "Unknown option: %s\n", cmd);
			cmd_usage(0, NULL, NULL);
		}

		(*argv)++;
		(*argc)--;
		handled++;
	}
	return handled;
}

static const char *alias_command;
static char *alias_string = NULL;

static int git_alias_config(const char *var, const char *value)
{
	if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) {
		alias_string = strdup(value);
	}
	return 0;
}

static int split_cmdline(char *cmdline, const char ***argv)
{
	int src, dst, count = 0, size = 16;
	char quoted = 0;

	*argv = malloc(sizeof(char*) * size);

	/* split alias_string */
	(*argv)[count++] = cmdline;
	for (src = dst = 0; cmdline[src];) {
		char c = cmdline[src];
		if (!quoted && isspace(c)) {
			cmdline[dst++] = 0;
			while (cmdline[++src]
					&& isspace(cmdline[src]))
				; /* skip */
			if (count >= size) {
				size += 16;
				*argv = realloc(*argv, sizeof(char*) * size);
			}
			(*argv)[count++] = cmdline + dst;
		} else if(!quoted && (c == '\'' || c == '"')) {
			quoted = c;
			src++;
		} else if (c == quoted) {
			quoted = 0;
			src++;
		} else {
			if (c == '\\' && quoted != '\'') {
				src++;
				c = cmdline[src];
				if (!c) {
					free(*argv);
					*argv = NULL;
					return error("cmdline ends with \\");
				}
			}
			cmdline[dst++] = c;
			src++;
		}
	}

	cmdline[dst] = 0;

	if (quoted) {
		free(*argv);
		*argv = NULL;
		return error("unclosed quote");
	}

	return count;
}

static int handle_alias(int *argcp, const char ***argv)
{
	int nongit = 0, ret = 0, saved_errno = errno;
	const char *subdir;

	subdir = setup_git_directory_gently(&nongit);
	if (!nongit) {
		int count, option_count;
		const char** new_argv;

		alias_command = (*argv)[0];
		git_config(git_alias_config);
		if (alias_string) {

			count = split_cmdline(alias_string, &new_argv);
			option_count = handle_options(&new_argv, &count);
			memmove(new_argv - option_count, new_argv,
					count * sizeof(char *));
			new_argv -= option_count;

			if (count < 1)
				die("empty alias for %s", alias_command);

			if (!strcmp(alias_command, new_argv[0]))
				die("recursive alias: %s", alias_command);

			if (getenv("GIT_TRACE")) {
				int i;
				fprintf(stderr, "trace: alias expansion: %s =>",
					alias_command);
				for (i = 0; i < count; ++i) {
					fputc(' ', stderr);
					sq_quote_print(stderr, new_argv[i]);
				}
				fputc('\n', stderr);
				fflush(stderr);
			}

			new_argv = realloc(new_argv, sizeof(char*) *
					   (count + *argcp + 1));
			/* insert after command name */
			memcpy(new_argv + count, *argv + 1,
			       sizeof(char*) * *argcp);
			new_argv[count+*argcp] = NULL;

			*argv = new_argv;
			*argcp += count - 1;

			ret = 1;
		}
	}

	if (subdir)
		chdir(subdir);

	errno = saved_errno;

	return ret;
}

const char git_version_string[] = GIT_VERSION;

#define NEEDS_PREFIX 1

static void handle_internal_command(int argc, const char **argv, char **envp)
{
	const char *cmd = argv[0];
	static struct cmd_struct {
		const char *cmd;
		int (*fn)(int, const char **, const char *);
		int prefix;
	} commands[] = {
		{ "version", cmd_version },
		{ "help", cmd_help },
		{ "log", cmd_log, NEEDS_PREFIX },
		{ "whatchanged", cmd_whatchanged, NEEDS_PREFIX },
		{ "show", cmd_show, NEEDS_PREFIX },
		{ "push", cmd_push },
		{ "format-patch", cmd_format_patch, NEEDS_PREFIX },
		{ "count-objects", cmd_count_objects },
		{ "diff", cmd_diff, NEEDS_PREFIX },
		{ "grep", cmd_grep, NEEDS_PREFIX },
		{ "rm", cmd_rm, NEEDS_PREFIX },
		{ "add", cmd_add, NEEDS_PREFIX },
		{ "rev-list", cmd_rev_list, NEEDS_PREFIX },
		{ "init-db", cmd_init_db },
		{ "get-tar-commit-id", cmd_get_tar_commit_id },
		{ "upload-tar", cmd_upload_tar },
		{ "check-ref-format", cmd_check_ref_format },
		{ "ls-files", cmd_ls_files, NEEDS_PREFIX },
		{ "ls-tree", cmd_ls_tree, NEEDS_PREFIX },
		{ "tar-tree", cmd_tar_tree, NEEDS_PREFIX },
		{ "read-tree", cmd_read_tree, NEEDS_PREFIX },
		{ "commit-tree", cmd_commit_tree, NEEDS_PREFIX },
		{ "apply", cmd_apply },
		{ "show-branch", cmd_show_branch, NEEDS_PREFIX },
		{ "diff-files", cmd_diff_files, NEEDS_PREFIX },
		{ "diff-index", cmd_diff_index, NEEDS_PREFIX },
		{ "diff-stages", cmd_diff_stages, NEEDS_PREFIX },
		{ "diff-tree", cmd_diff_tree, NEEDS_PREFIX },
		{ "cat-file", cmd_cat_file, NEEDS_PREFIX },
		{ "rev-parse", cmd_rev_parse, NEEDS_PREFIX },
		{ "write-tree", cmd_write_tree, NEEDS_PREFIX },
		{ "mailsplit", cmd_mailsplit },
		{ "mailinfo", cmd_mailinfo },
		{ "stripspace", cmd_stripspace },
		{ "update-index", cmd_update_index, NEEDS_PREFIX },
		{ "update-ref", cmd_update_ref, NEEDS_PREFIX },
		{ "fmt-merge-msg", cmd_fmt_merge_msg, NEEDS_PREFIX },
		{ "prune", cmd_prune, NEEDS_PREFIX },
		{ "mv", cmd_mv, NEEDS_PREFIX },
	};
	int i;

	/* Turn "git cmd --help" into "git help cmd" */
	if (argc > 1 && !strcmp(argv[1], "--help")) {
		argv[1] = argv[0];
		argv[0] = cmd = "help";
	}

	for (i = 0; i < ARRAY_SIZE(commands); i++) {
		struct cmd_struct *p = commands+i;
		const char *prefix;
		if (strcmp(p->cmd, cmd))
			continue;

		prefix = NULL;
		if (p->prefix)
			prefix = setup_git_directory();
		if (getenv("GIT_TRACE")) {
			int i;
			fprintf(stderr, "trace: built-in: git");
			for (i = 0; i < argc; ++i) {
				fputc(' ', stderr);
				sq_quote_print(stderr, argv[i]);
			}
			putc('\n', stderr);
			fflush(stderr);
		}

		exit(p->fn(argc, argv, prefix));
	}
}

int main(int argc, const char **argv, char **envp)
{
	const char *cmd = argv[0];
	char *slash = strrchr(cmd, '/');
	const char *exec_path = NULL;
	int done_alias = 0;

	/*
	 * Take the basename of argv[0] as the command
	 * name, and the dirname as the default exec_path
	 * if it's an absolute path and we don't have
	 * anything better.
	 */
	if (slash) {
		*slash++ = 0;
		if (*cmd == '/')
			exec_path = cmd;
		cmd = slash;
	}

	/*
	 * "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 (!strncmp(cmd, "git-", 4)) {
		cmd += 4;
		argv[0] = cmd;
		handle_internal_command(argc, argv, envp);
		die("cannot handle %s internally", cmd);
	}

	/* Look for flags.. */
	argv++;
	argc--;
	handle_options(&argv, &argc);
	if (argc > 0) {
		if (!strncmp(argv[0], "--", 2))
			argv[0] += 2;
	} else {
		/* Default command: "help" */
		argv[0] = "help";
		argc = 1;
	}
	cmd = argv[0];

	/*
	 * We search for git commands in the following order:
	 *  - git_exec_path()
	 *  - the path of the "git" command if we could find it
	 *    in $0
	 *  - the regular PATH.
	 */
	if (exec_path)
		prepend_to_path(exec_path, strlen(exec_path));
	exec_path = git_exec_path();
	prepend_to_path(exec_path, strlen(exec_path));

	while (1) {
		/* See if it's an internal command */
		handle_internal_command(argc, argv, envp);

		/* .. then try the external ones */
		execv_git_cmd(argv);

		/* It could be an alias -- this works around the insanity
		 * of overriding "git log" with "git show" by having
		 * alias.log = show
		 */
		if (done_alias || !handle_alias(&argc, &argv))
			break;
		done_alias = 1;
	}

	if (errno == ENOENT)
		cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);

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

	return 1;
}
Commit	Line	Data
8e49d503	1	#include <stdio.h>
7dbc2c04 JH	2	#include <sys/types.h>
	3	#include <sys/stat.h>
	4	#include <dirent.h>
8e49d503 AE	5	#include <unistd.h>
	6	#include <stdlib.h>
	7	#include <string.h>
	8	#include <errno.h>
	9	#include <limits.h>
	10	#include <stdarg.h>
4050c0df	11	#include "git-compat-util.h"
77cb17e9	12	#include "exec_cmd.h"
2b11e317	13	#include "cache.h"
575ba9d6	14	#include "quote.h"
8e49d503	15
70827b15	16	#include "builtin.h"
8e49d503 AE	17
	18	static void prepend_to_path(const char *dir, int len)
	19	{
554fe20d TH	20	const char *old_path = getenv("PATH");
554fe20d TH	21	char *path;
8e49d503 AE	22	int path_len = len;
	23
	24	if (!old_path)
7dbc2c04	25	old_path = "/usr/local/bin:/usr/bin:/bin";
8e49d503 AE	26
	27	path_len = len + strlen(old_path) + 1;
	28
	29	path = malloc(path_len + 1);
8e49d503 AE	30
	31	memcpy(path, dir, len);
	32	path[len] = ':';
	33	memcpy(path + len + 1, old_path, path_len - len);
	34
	35	setenv("PATH", path, 1);
	36	}
	37
4ab243a9 JS	38	static int handle_options(const char*** argv, int* argc)
	39	{
	40	int handled = 0;
	41
	42	while (*argc > 0) {
	43	const char cmd = (argv)[0];
	44	if (cmd[0] != '-')
	45	break;
	46
6acbcb92 JS	47	/*
	48	* For legacy reasons, the "version" and "help"
	49	* commands can be written with "--" prepended
	50	* to make them look like flags.
	51	*/
	52	if (!strcmp(cmd, "--help") \|\| !strcmp(cmd, "--version"))
	53	break;
	54
	55	/*
	56	* Check remaining flags.
	57	*/
	58	if (!strncmp(cmd, "--exec-path", 11)) {
	59	cmd += 11;
	60	if (*cmd == '=')
	61	git_set_exec_path(cmd + 1);
	62	else {
	63	puts(git_exec_path());
	64	exit(0);
	65	}
	66	} else if (!strcmp(cmd, "-p") \|\| !strcmp(cmd, "--paginate")) {
4ab243a9	67	setup_pager();
6acbcb92 JS	68	} else if (!strcmp(cmd, "--git-dir")) {
	69	if (*argc < 1)
	70	return -1;
	71	setenv("GIT_DIR", (*argv)[1], 1);
	72	(*argv)++;
	73	(*argc)--;
	74	} else if (!strncmp(cmd, "--git-dir=", 10)) {
	75	setenv("GIT_DIR", cmd + 10, 1);
	76	} else if (!strcmp(cmd, "--bare")) {
	77	static char git_dir[1024];
	78	setenv("GIT_DIR", getcwd(git_dir, 1024), 1);
	79	} else {
	80	fprintf(stderr, "Unknown option: %s\n", cmd);
	81	cmd_usage(0, NULL, NULL);
	82	}
4ab243a9 JS	83
	84	(*argv)++;
	85	(*argc)--;
	86	handled++;
	87	}
	88	return handled;
	89	}
	90
2b11e317 JS	91	static const char *alias_command;
	92	static char *alias_string = NULL;
	93
	94	static int git_alias_config(const char var, const char value)
	95	{
	96	if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) {
	97	alias_string = strdup(value);
	98	}
	99	return 0;
	100	}
	101
	102	static int split_cmdline(char cmdline, const char **argv)
	103	{
	104	int src, dst, count = 0, size = 16;
	105	char quoted = 0;
	106
	107	argv = malloc(sizeof(char) * size);
	108
	109	/* split alias_string */
	110	(*argv)[count++] = cmdline;
	111	for (src = dst = 0; cmdline[src];) {
	112	char c = cmdline[src];
	113	if (!quoted && isspace(c)) {
	114	cmdline[dst++] = 0;
	115	while (cmdline[++src]
	116	&& isspace(cmdline[src]))
	117	; /* skip */
	118	if (count >= size) {
	119	size += 16;
	120	argv = realloc(argv, sizeof(char) size);
	121	}
	122	(*argv)[count++] = cmdline + dst;
	123	} else if(!quoted && (c == '\'' \|\| c == '"')) {
	124	quoted = c;
	125	src++;
	126	} else if (c == quoted) {
	127	quoted = 0;
	128	src++;
	129	} else {
	130	if (c == '\\' && quoted != '\'') {
	131	src++;
	132	c = cmdline[src];
	133	if (!c) {
	134	free(*argv);
	135	*argv = NULL;
	136	return error("cmdline ends with \\");
	137	}
	138	}
	139	cmdline[dst++] = c;
	140	src++;
	141	}
	142	}
	143
	144	cmdline[dst] = 0;
	145
	146	if (quoted) {
	147	free(*argv);
	148	*argv = NULL;
	149	return error("unclosed quote");
	150	}
	151
	152	return count;
	153	}
	154
155	static int handle_alias(int argcp, const char **argv)
156	{
47e5c0ca	157	int nongit = 0, ret = 0, saved_errno = errno;
2b11e317 JS	158	const char *subdir;
	159
	160	subdir = setup_git_directory_gently(&nongit);
	161	if (!nongit) {
4ab243a9	162	int count, option_count;
2b11e317 JS	163	const char** new_argv;
	164
	165	alias_command = (*argv)[0];
	166	git_config(git_alias_config);
	167	if (alias_string) {
	168
	169	count = split_cmdline(alias_string, &new_argv);
4ab243a9 JS	170	option_count = handle_options(&new_argv, &count);
	171	memmove(new_argv - option_count, new_argv,
	172	count * sizeof(char *));
	173	new_argv -= option_count;
2b11e317 JS	174
	175	if (count < 1)
	176	die("empty alias for %s", alias_command);
	177
	178	if (!strcmp(alias_command, new_argv[0]))
	179	die("recursive alias: %s", alias_command);
	180
575ba9d6 ML	181	if (getenv("GIT_TRACE")) {
	182	int i;
	183	fprintf(stderr, "trace: alias expansion: %s =>",
	184	alias_command);
	185	for (i = 0; i < count; ++i) {
	186	fputc(' ', stderr);
	187	sq_quote_print(stderr, new_argv[i]);
	188	}
	189	fputc('\n', stderr);
	190	fflush(stderr);
	191	}
	192
d5b9e6cf ML	193	new_argv = realloc(new_argv, sizeof(char)
d5b9e6cf ML	194	(count + *argcp + 1));
2b11e317	195	/* insert after command name */
d5b9e6cf ML	196	memcpy(new_argv + count, *argv + 1,
	197	sizeof(char) *argcp);
	198	new_argv[count+*argcp] = NULL;
2b11e317 JS	199
	200	*argv = new_argv;
	201	*argcp += count - 1;
	202
	203	ret = 1;
	204	}
	205	}
	206
	207	if (subdir)
	208	chdir(subdir);
	209
47e5c0ca JS	210	errno = saved_errno;
47e5c0ca JS	211
2b11e317 JS	212	return ret;
	213	}
	214
70827b15	215	const char git_version_string[] = GIT_VERSION;
5b84f4d8	216
a633fca0 LT	217	#define NEEDS_PREFIX 1
a633fca0 LT	218
9201c707	219	static void handle_internal_command(int argc, const char argv, char envp)
231af832 LT	220	{
	221	const char *cmd = argv[0];
	222	static struct cmd_struct {
	223	const char *cmd;
a633fca0 LT	224	int (fn)(int, const char , const char );
a633fca0 LT	225	int prefix;
231af832 LT	226	} commands[] = {
	227	{ "version", cmd_version },
	228	{ "help", cmd_help },
a633fca0 LT	229	{ "log", cmd_log, NEEDS_PREFIX },
	230	{ "whatchanged", cmd_whatchanged, NEEDS_PREFIX },
	231	{ "show", cmd_show, NEEDS_PREFIX },
755225de	232	{ "push", cmd_push },
a633fca0	233	{ "format-patch", cmd_format_patch, NEEDS_PREFIX },
c7432087	234	{ "count-objects", cmd_count_objects },
a633fca0 LT	235	{ "diff", cmd_diff, NEEDS_PREFIX },
	236	{ "grep", cmd_grep, NEEDS_PREFIX },
	237	{ "rm", cmd_rm, NEEDS_PREFIX },
	238	{ "add", cmd_add, NEEDS_PREFIX },
	239	{ "rev-list", cmd_rev_list, NEEDS_PREFIX },
c3c8835f	240	{ "init-db", cmd_init_db },
52ba03cb	241	{ "get-tar-commit-id", cmd_get_tar_commit_id },
21754264	242	{ "upload-tar", cmd_upload_tar },
0864f264	243	{ "check-ref-format", cmd_check_ref_format },
a633fca0 LT	244	{ "ls-files", cmd_ls_files, NEEDS_PREFIX },
	245	{ "ls-tree", cmd_ls_tree, NEEDS_PREFIX },
	246	{ "tar-tree", cmd_tar_tree, NEEDS_PREFIX },
	247	{ "read-tree", cmd_read_tree, NEEDS_PREFIX },
	248	{ "commit-tree", cmd_commit_tree, NEEDS_PREFIX },
51ce34b9	249	{ "apply", cmd_apply },
a633fca0 LT	250	{ "show-branch", cmd_show_branch, NEEDS_PREFIX },
	251	{ "diff-files", cmd_diff_files, NEEDS_PREFIX },
	252	{ "diff-index", cmd_diff_index, NEEDS_PREFIX },
	253	{ "diff-stages", cmd_diff_stages, NEEDS_PREFIX },
	254	{ "diff-tree", cmd_diff_tree, NEEDS_PREFIX },
	255	{ "cat-file", cmd_cat_file, NEEDS_PREFIX },
	256	{ "rev-parse", cmd_rev_parse, NEEDS_PREFIX },
	257	{ "write-tree", cmd_write_tree, NEEDS_PREFIX },
34488e3c	258	{ "mailsplit", cmd_mailsplit },
7499c996	259	{ "mailinfo", cmd_mailinfo },
fefe81c9	260	{ "stripspace", cmd_stripspace },
a633fca0 LT	261	{ "update-index", cmd_update_index, NEEDS_PREFIX },
	262	{ "update-ref", cmd_update_ref, NEEDS_PREFIX },
	263	{ "fmt-merge-msg", cmd_fmt_merge_msg, NEEDS_PREFIX },
	264	{ "prune", cmd_prune, NEEDS_PREFIX },
7061cf0f	265	{ "mv", cmd_mv, NEEDS_PREFIX },
231af832 LT	266	};
	267	int i;
	268
1cd95087 LT	269	/* Turn "git cmd --help" into "git help cmd" */
	270	if (argc > 1 && !strcmp(argv[1], "--help")) {
	271	argv[1] = argv[0];
	272	argv[0] = cmd = "help";
	273	}
	274
231af832 LT	275	for (i = 0; i < ARRAY_SIZE(commands); i++) {
231af832 LT	276	struct cmd_struct *p = commands+i;
a633fca0	277	const char *prefix;
231af832 LT	278	if (strcmp(p->cmd, cmd))
231af832 LT	279	continue;
575ba9d6	280
a633fca0 LT	281	prefix = NULL;
	282	if (p->prefix)
	283	prefix = setup_git_directory();
575ba9d6 ML	284	if (getenv("GIT_TRACE")) {
	285	int i;
	286	fprintf(stderr, "trace: built-in: git");
	287	for (i = 0; i < argc; ++i) {
	288	fputc(' ', stderr);
	289	sq_quote_print(stderr, argv[i]);
	290	}
	291	putc('\n', stderr);
	292	fflush(stderr);
	293	}
	294
a633fca0	295	exit(p->fn(argc, argv, prefix));
231af832 LT	296	}
	297	}
	298
9201c707	299	int main(int argc, const char argv, char envp)
8e49d503	300	{
9201c707	301	const char *cmd = argv[0];
231af832	302	char *slash = strrchr(cmd, '/');
231af832	303	const char *exec_path = NULL;
a025463b	304	int done_alias = 0;
231af832 LT	305
	306	/*
	307	* Take the basename of argv[0] as the command
	308	* name, and the dirname as the default exec_path
	309	* if it's an absolute path and we don't have
	310	* anything better.
	311	*/
	312	if (slash) {
	313	*slash++ = 0;
	314	if (*cmd == '/')
	315	exec_path = cmd;
	316	cmd = slash;
	317	}
8e49d503	318
231af832 LT	319	/*
	320	* "git-xxxx" is the same as "git xxxx", but we obviously:
	321	*
	322	* - cannot take flags in between the "git" and the "xxxx".
	323	* - cannot execute it externally (since it would just do
	324	* the same thing over again)
	325	*
	326	* So we just directly call the internal command handler, and
	327	* die if that one cannot handle it.
	328	*/
	329	if (!strncmp(cmd, "git-", 4)) {
	330	cmd += 4;
	331	argv[0] = cmd;
	332	handle_internal_command(argc, argv, envp);
	333	die("cannot handle %s internally", cmd);
	334	}
8e49d503	335
231af832	336	/* Look for flags.. */
6acbcb92 JS	337	argv++;
	338	argc--;
	339	handle_options(&argv, &argc);
	340	if (argc > 0) {
	341	if (!strncmp(argv[0], "--", 2))
	342	argv[0] += 2;
	343	} else {
	344	/* Default command: "help" */
	345	argv[0] = "help";
	346	argc = 1;
97fc6c5f	347	}
6acbcb92	348	cmd = argv[0];
231af832 LT	349
	350	/*
	351	* We search for git commands in the following order:
	352	* - git_exec_path()
	353	* - the path of the "git" command if we could find it
	354	* in $0
	355	* - the regular PATH.
	356	*/
	357	if (exec_path)
	358	prepend_to_path(exec_path, strlen(exec_path));
77cb17e9 MO	359	exec_path = git_exec_path();
77cb17e9 MO	360	prepend_to_path(exec_path, strlen(exec_path));
8e49d503	361
a025463b JH	362	while (1) {
	363	/* See if it's an internal command */
	364	handle_internal_command(argc, argv, envp);
2b11e317	365
a025463b JH	366	/* .. then try the external ones */
a025463b JH	367	execv_git_cmd(argv);
231af832	368
a025463b JH	369	/* It could be an alias -- this works around the insanity
	370	* of overriding "git log" with "git show" by having
	371	* alias.log = show
	372	*/
	373	if (done_alias \|\| !handle_alias(&argc, &argv))
	374	break;
	375	done_alias = 1;
	376	}
10b15b86 AR	377
10b15b86 AR	378	if (errno == ENOENT)
a87cd02c	379	cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
10b15b86 AR	380
10b15b86 AR	381	fprintf(stderr, "Failed to run command '%s': %s\n",
33ebb871	382	cmd, strerror(errno));
8e49d503 AE	383
	384	return 1;
	385	}