1#include "builtin.h"
2#include "exec_cmd.h"
3#include "help.h"
4#include "run-command.h"
5const char git_usage_string[] =
7 "git [--version] [--help] [-C <path>] [-c name=value]\n"
8 " [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
9 " [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]\n"
10 " [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
11 " <command> [<args>]";
12const char git_more_info_string[] =
14 N_("'git help -a' and 'git help -g' list available subcommands and some\n"
15 "concept guides. See 'git help <command>' or 'git help <concept>'\n"
16 "to read about a specific subcommand or concept.");
17static int use_pager = -1;
19static void commit_pager_choice(void) {
21 switch (use_pager) {
22 case 0:
23 setenv("GIT_PAGER", "cat", 1);
24 break;
25 case 1:
26 setup_pager();
27 break;
28 default:
29 break;
30 }
31}
32static int handle_options(const char ***argv, int *argc, int *envchanged)
34{
35 const char **orig_argv = *argv;
36 while (*argc > 0) {
38 const char *cmd = (*argv)[0];
39 if (cmd[0] != '-')
40 break;
41 /*
43 * For legacy reasons, the "version" and "help"
44 * commands can be written with "--" prepended
45 * to make them look like flags.
46 */
47 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
48 break;
49 /*
51 * Check remaining flags.
52 */
53 if (skip_prefix(cmd, "--exec-path", &cmd)) {
54 if (*cmd == '=')
55 git_set_argv_exec_path(cmd + 1);
56 else {
57 puts(git_exec_path());
58 exit(0);
59 }
60 } else if (!strcmp(cmd, "--html-path")) {
61 puts(system_path(GIT_HTML_PATH));
62 exit(0);
63 } else if (!strcmp(cmd, "--man-path")) {
64 puts(system_path(GIT_MAN_PATH));
65 exit(0);
66 } else if (!strcmp(cmd, "--info-path")) {
67 puts(system_path(GIT_INFO_PATH));
68 exit(0);
69 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
70 use_pager = 1;
71 } else if (!strcmp(cmd, "--no-pager")) {
72 use_pager = 0;
73 if (envchanged)
74 *envchanged = 1;
75 } else if (!strcmp(cmd, "--no-replace-objects")) {
76 check_replace_refs = 0;
77 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
78 if (envchanged)
79 *envchanged = 1;
80 } else if (!strcmp(cmd, "--git-dir")) {
81 if (*argc < 2) {
82 fprintf(stderr, "No directory given for --git-dir.\n" );
83 usage(git_usage_string);
84 }
85 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
86 if (envchanged)
87 *envchanged = 1;
88 (*argv)++;
89 (*argc)--;
90 } else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
91 setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
92 if (envchanged)
93 *envchanged = 1;
94 } else if (!strcmp(cmd, "--namespace")) {
95 if (*argc < 2) {
96 fprintf(stderr, "No namespace given for --namespace.\n" );
97 usage(git_usage_string);
98 }
99 setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
100 if (envchanged)
101 *envchanged = 1;
102 (*argv)++;
103 (*argc)--;
104 } else if (skip_prefix(cmd, "--namespace=", &cmd)) {
105 setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
106 if (envchanged)
107 *envchanged = 1;
108 } else if (!strcmp(cmd, "--work-tree")) {
109 if (*argc < 2) {
110 fprintf(stderr, "No directory given for --work-tree.\n" );
111 usage(git_usage_string);
112 }
113 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
114 if (envchanged)
115 *envchanged = 1;
116 (*argv)++;
117 (*argc)--;
118 } else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
119 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
120 if (envchanged)
121 *envchanged = 1;
122 } else if (!strcmp(cmd, "--super-prefix")) {
123 if (*argc < 2) {
124 fprintf(stderr, "No prefix given for --super-prefix.\n" );
125 usage(git_usage_string);
126 }
127 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, (*argv)[1], 1);
128 if (envchanged)
129 *envchanged = 1;
130 (*argv)++;
131 (*argc)--;
132 } else if (skip_prefix(cmd, "--super-prefix=", &cmd)) {
133 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, cmd, 1);
134 if (envchanged)
135 *envchanged = 1;
136 } else if (!strcmp(cmd, "--bare")) {
137 char *cwd = xgetcwd();
138 is_bare_repository_cfg = 1;
139 setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
140 free(cwd);
141 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
142 if (envchanged)
143 *envchanged = 1;
144 } else if (!strcmp(cmd, "-c")) {
145 if (*argc < 2) {
146 fprintf(stderr, "-c expects a configuration string\n" );
147 usage(git_usage_string);
148 }
149 git_config_push_parameter((*argv)[1]);
150 (*argv)++;
151 (*argc)--;
152 } else if (!strcmp(cmd, "--literal-pathspecs")) {
153 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
154 if (envchanged)
155 *envchanged = 1;
156 } else if (!strcmp(cmd, "--no-literal-pathspecs")) {
157 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
158 if (envchanged)
159 *envchanged = 1;
160 } else if (!strcmp(cmd, "--glob-pathspecs")) {
161 setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
162 if (envchanged)
163 *envchanged = 1;
164 } else if (!strcmp(cmd, "--noglob-pathspecs")) {
165 setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
166 if (envchanged)
167 *envchanged = 1;
168 } else if (!strcmp(cmd, "--icase-pathspecs")) {
169 setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
170 if (envchanged)
171 *envchanged = 1;
172 } else if (!strcmp(cmd, "--shallow-file")) {
173 (*argv)++;
174 (*argc)--;
175 set_alternate_shallow_file((*argv)[0], 1);
176 if (envchanged)
177 *envchanged = 1;
178 } else if (!strcmp(cmd, "-C")) {
179 if (*argc < 2) {
180 fprintf(stderr, "No directory given for -C.\n" );
181 usage(git_usage_string);
182 }
183 if ((*argv)[1][0]) {
184 if (chdir((*argv)[1]))
185 die_errno("Cannot change to '%s'", (*argv)[1]);
186 if (envchanged)
187 *envchanged = 1;
188 }
189 (*argv)++;
190 (*argc)--;
191 } else {
192 fprintf(stderr, "Unknown option: %s\n", cmd);
193 usage(git_usage_string);
194 }
195 (*argv)++;
197 (*argc)--;
198 }
199 return (*argv) - orig_argv;
200}
201static int handle_alias(int *argcp, const char ***argv)
203{
204 int envchanged = 0, ret = 0, saved_errno = errno;
205 int count, option_count;
206 const char **new_argv;
207 const char *alias_command;
208 char *alias_string;
209 alias_command = (*argv)[0];
211 alias_string = alias_lookup(alias_command);
212 if (alias_string) {
213 if (alias_string[0] == '!') {
214 struct child_process child = CHILD_PROCESS_INIT;
215 int nongit_ok;
216 /* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
218 setup_git_directory_gently(&nongit_ok);
219 commit_pager_choice();
221 child.use_shell = 1;
223 argv_array_push(&child.args, alias_string + 1);
224 argv_array_pushv(&child.args, (*argv) + 1);
225 ret = run_command(&child);
227 if (ret >= 0) /* normal exit */
228 exit(ret);
229 die_errno("While expanding alias '%s': '%s'",
231 alias_command, alias_string + 1);
232 }
233 count = split_cmdline(alias_string, &new_argv);
234 if (count < 0)
235 die("Bad alias.%s string: %s", alias_command,
236 split_cmdline_strerror(count));
237 option_count = handle_options(&new_argv, &count, &envchanged);
238 if (envchanged)
239 die("alias '%s' changes environment variables\n"
240 "You can use '!git' in the alias to do this.",
241 alias_command);
242 memmove(new_argv - option_count, new_argv,
243 count * sizeof(char *));
244 new_argv -= option_count;
245 if (count < 1)
247 die("empty alias for %s", alias_command);
248 if (!strcmp(alias_command, new_argv[0]))
250 die("recursive alias: %s", alias_command);
251 trace_argv_printf(new_argv,
253 "trace: alias expansion: %s =>",
254 alias_command);
255 REALLOC_ARRAY(new_argv, count + *argcp);
257 /* insert after command name */
258 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
259 *argv = new_argv;
261 *argcp += count - 1;
262 ret = 1;
264 }
265 errno = saved_errno;
267 return ret;
269}
270#define RUN_SETUP (1<<0)
272#define RUN_SETUP_GENTLY (1<<1)
273#define USE_PAGER (1<<2)
274/*
275 * require working tree to be present -- anything uses this needs
276 * RUN_SETUP for reading from the configuration file.
277 */
278#define NEED_WORK_TREE (1<<3)
279#define SUPPORT_SUPER_PREFIX (1<<4)
280struct cmd_struct {
282 const char *cmd;
283 int (*fn)(int, const char **, const char *);
284 int option;
285};
286static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
288{
289 int status, help;
290 struct stat st;
291 const char *prefix;
292 prefix = NULL;
294 help = argc == 2 && !strcmp(argv[1], "-h");
295 if (!help) {
296 if (p->option & RUN_SETUP)
297 prefix = setup_git_directory();
298 else if (p->option & RUN_SETUP_GENTLY) {
299 int nongit_ok;
300 prefix = setup_git_directory_gently(&nongit_ok);
301 }
302 if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY))
304 use_pager = check_pager_config(p->cmd);
305 if (use_pager == -1 && p->option & USE_PAGER)
306 use_pager = 1;
307 if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
309 startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
310 trace_repo_setup(prefix);
311 }
312 commit_pager_choice();
313 if (!help && get_super_prefix()) {
315 if (!(p->option & SUPPORT_SUPER_PREFIX))
316 die("%s doesn't support --super-prefix", p->cmd);
317 }
318 if (!help && p->option & NEED_WORK_TREE)
320 setup_work_tree();
321 trace_argv_printf(argv, "trace: built-in: git");
323 status = p->fn(argc, argv, prefix);
325 if (status)
326 return status;
327 /* Somebody closed stdout? */
329 if (fstat(fileno(stdout), &st))
330 return 0;
331 /* Ignore write errors for pipes and sockets.. */
332 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
333 return 0;
334 /* Check for ENOSPC and EIO errors.. */
336 if (fflush(stdout))
337 die_errno("write failure on standard output");
338 if (ferror(stdout))
339 die("unknown write failure on standard output");
340 if (fclose(stdout))
341 die_errno("close failed on standard output");
342 return 0;
343}
344static struct cmd_struct commands[] = {
346 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
347 { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
348 { "annotate", cmd_annotate, RUN_SETUP },
349 { "apply", cmd_apply, RUN_SETUP_GENTLY },
350 { "archive", cmd_archive, RUN_SETUP_GENTLY },
351 { "bisect--helper", cmd_bisect__helper, RUN_SETUP },
352 { "blame", cmd_blame, RUN_SETUP },
353 { "branch", cmd_branch, RUN_SETUP },
354 { "bundle", cmd_bundle, RUN_SETUP_GENTLY },
355 { "cat-file", cmd_cat_file, RUN_SETUP },
356 { "check-attr", cmd_check_attr, RUN_SETUP },
357 { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
358 { "check-mailmap", cmd_check_mailmap, RUN_SETUP },
359 { "check-ref-format", cmd_check_ref_format },
360 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
361 { "checkout-index", cmd_checkout_index,
362 RUN_SETUP | NEED_WORK_TREE},
363 { "cherry", cmd_cherry, RUN_SETUP },
364 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
365 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
366 { "clone", cmd_clone },
367 { "column", cmd_column, RUN_SETUP_GENTLY },
368 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
369 { "commit-tree", cmd_commit_tree, RUN_SETUP },
370 { "config", cmd_config, RUN_SETUP_GENTLY },
371 { "count-objects", cmd_count_objects, RUN_SETUP },
372 { "credential", cmd_credential, RUN_SETUP_GENTLY },
373 { "describe", cmd_describe, RUN_SETUP },
374 { "diff", cmd_diff },
375 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
376 { "diff-index", cmd_diff_index, RUN_SETUP },
377 { "diff-tree", cmd_diff_tree, RUN_SETUP },
378 { "difftool", cmd_difftool, RUN_SETUP | NEED_WORK_TREE },
379 { "fast-export", cmd_fast_export, RUN_SETUP },
380 { "fetch", cmd_fetch, RUN_SETUP },
381 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
382 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
383 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
384 { "format-patch", cmd_format_patch, RUN_SETUP },
385 { "fsck", cmd_fsck, RUN_SETUP },
386 { "fsck-objects", cmd_fsck, RUN_SETUP },
387 { "gc", cmd_gc, RUN_SETUP },
388 { "get-tar-commit-id", cmd_get_tar_commit_id },
389 { "grep", cmd_grep, RUN_SETUP_GENTLY | SUPPORT_SUPER_PREFIX },
390 { "hash-object", cmd_hash_object },
391 { "help", cmd_help },
392 { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
393 { "init", cmd_init_db },
394 { "init-db", cmd_init_db },
395 { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
396 { "log", cmd_log, RUN_SETUP },
397 { "ls-files", cmd_ls_files, RUN_SETUP | SUPPORT_SUPER_PREFIX },
398 { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
399 { "ls-tree", cmd_ls_tree, RUN_SETUP },
400 { "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY },
401 { "mailsplit", cmd_mailsplit },
402 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
403 { "merge-base", cmd_merge_base, RUN_SETUP },
404 { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
405 { "merge-index", cmd_merge_index, RUN_SETUP },
406 { "merge-ours", cmd_merge_ours, RUN_SETUP },
407 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
408 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
409 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
410 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
411 { "merge-tree", cmd_merge_tree, RUN_SETUP },
412 { "mktag", cmd_mktag, RUN_SETUP },
413 { "mktree", cmd_mktree, RUN_SETUP },
414 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
415 { "name-rev", cmd_name_rev, RUN_SETUP },
416 { "notes", cmd_notes, RUN_SETUP },
417 { "pack-objects", cmd_pack_objects, RUN_SETUP },
418 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
419 { "pack-refs", cmd_pack_refs, RUN_SETUP },
420 { "patch-id", cmd_patch_id, RUN_SETUP_GENTLY },
421 { "pickaxe", cmd_blame, RUN_SETUP },
422 { "prune", cmd_prune, RUN_SETUP },
423 { "prune-packed", cmd_prune_packed, RUN_SETUP },
424 { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
425 { "push", cmd_push, RUN_SETUP },
426 { "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX},
427 { "rebase--helper", cmd_rebase__helper, RUN_SETUP | NEED_WORK_TREE },
428 { "receive-pack", cmd_receive_pack },
429 { "reflog", cmd_reflog, RUN_SETUP },
430 { "remote", cmd_remote, RUN_SETUP },
431 { "remote-ext", cmd_remote_ext },
432 { "remote-fd", cmd_remote_fd },
433 { "repack", cmd_repack, RUN_SETUP },
434 { "replace", cmd_replace, RUN_SETUP },
435 { "rerere", cmd_rerere, RUN_SETUP },
436 { "reset", cmd_reset, RUN_SETUP },
437 { "rev-list", cmd_rev_list, RUN_SETUP },
438 { "rev-parse", cmd_rev_parse },
439 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
440 { "rm", cmd_rm, RUN_SETUP },
441 { "send-pack", cmd_send_pack, RUN_SETUP },
442 { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
443 { "show", cmd_show, RUN_SETUP },
444 { "show-branch", cmd_show_branch, RUN_SETUP },
445 { "show-ref", cmd_show_ref, RUN_SETUP },
446 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
447 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
448 { "stripspace", cmd_stripspace },
449 { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX},
450 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
451 { "tag", cmd_tag, RUN_SETUP },
452 { "unpack-file", cmd_unpack_file, RUN_SETUP },
453 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
454 { "update-index", cmd_update_index, RUN_SETUP },
455 { "update-ref", cmd_update_ref, RUN_SETUP },
456 { "update-server-info", cmd_update_server_info, RUN_SETUP },
457 { "upload-archive", cmd_upload_archive },
458 { "upload-archive--writer", cmd_upload_archive_writer },
459 { "var", cmd_var, RUN_SETUP_GENTLY },
460 { "verify-commit", cmd_verify_commit, RUN_SETUP },
461 { "verify-pack", cmd_verify_pack },
462 { "verify-tag", cmd_verify_tag, RUN_SETUP },
463 { "version", cmd_version },
464 { "whatchanged", cmd_whatchanged, RUN_SETUP },
465 { "worktree", cmd_worktree, RUN_SETUP },
466 { "write-tree", cmd_write_tree, RUN_SETUP },
467};
468static struct cmd_struct *get_builtin(const char *s)
470{
471 int i;
472 for (i = 0; i < ARRAY_SIZE(commands); i++) {
473 struct cmd_struct *p = commands + i;
474 if (!strcmp(s, p->cmd))
475 return p;
476 }
477 return NULL;
478}
479int is_builtin(const char *s)
481{
482 return !!get_builtin(s);
483}
484#ifdef STRIP_EXTENSION
486static void strip_extension(const char **argv)
487{
488 size_t len;
489 if (strip_suffix(argv[0], STRIP_EXTENSION, &len))
491 argv[0] = xmemdupz(argv[0], len);
492}
493#else
494#define strip_extension(cmd)
495#endif
496static void handle_builtin(int argc, const char **argv)
498{
499 struct argv_array args = ARGV_ARRAY_INIT;
500 const char *cmd;
501 struct cmd_struct *builtin;
502 strip_extension(argv);
504 cmd = argv[0];
505 /* Turn "git cmd --help" into "git help --exclude-guides cmd" */
507 if (argc > 1 && !strcmp(argv[1], "--help")) {
508 int i;
509 argv[1] = argv[0];
511 argv[0] = cmd = "help";
512 for (i = 0; i < argc; i++) {
514 argv_array_push(&args, argv[i]);
515 if (!i)
516 argv_array_push(&args, "--exclude-guides");
517 }
518 argc++;
520 argv = args.argv;
521 }
522 builtin = get_builtin(cmd);
524 if (builtin)
525 exit(run_builtin(builtin, argc, argv));
526 argv_array_clear(&args);
527}
528static void execv_dashed_external(const char **argv)
530{
531 struct child_process cmd = CHILD_PROCESS_INIT;
532 int status;
533 if (get_super_prefix())
535 die("%s doesn't support --super-prefix", argv[0]);
536 if (use_pager == -1)
538 use_pager = check_pager_config(argv[0]);
539 commit_pager_choice();
540 argv_array_pushf(&cmd.args, "git-%s", argv[0]);
542 argv_array_pushv(&cmd.args, argv + 1);
543 cmd.clean_on_exit = 1;
544 cmd.wait_after_clean = 1;
545 cmd.silent_exec_failure = 1;
546 trace_argv_printf(cmd.args.argv, "trace: exec:");
548 /*
550 * If we fail because the command is not found, it is
551 * OK to return. Otherwise, we just pass along the status code,
552 * or our usual generic code if we were not even able to exec
553 * the program.
554 */
555 status = run_command(&cmd);
556 if (status >= 0)
557 exit(status);
558 else if (errno != ENOENT)
559 exit(128);
560}
561static int run_argv(int *argcp, const char ***argv)
563{
564 int done_alias = 0;
565 while (1) {
567 /*
568 * If we tried alias and futzed with our environment,
569 * it no longer is safe to invoke builtins directly in
570 * general. We have to spawn them as dashed externals.
571 *
572 * NEEDSWORK: if we can figure out cases
573 * where it is safe to do, we can avoid spawning a new
574 * process.
575 */
576 if (!done_alias)
577 handle_builtin(*argcp, *argv);
578 /* .. then try the external ones */
580 execv_dashed_external(*argv);
581 /* It could be an alias -- this works around the insanity
583 * of overriding "git log" with "git show" by having
584 * alias.log = show
585 */
586 if (done_alias)
587 break;
588 if (!handle_alias(argcp, argv))
589 break;
590 done_alias = 1;
591 }
592 return done_alias;
594}
595int cmd_main(int argc, const char **argv)
597{
598 const char *cmd;
599 int done_help = 0;
600 cmd = argv[0];
602 if (!cmd)
603 cmd = "git-help";
604 else {
605 const char *slash = find_last_dir_sep(cmd);
606 if (slash)
607 cmd = slash + 1;
608 }
609 trace_command_performance(argv);
611 /*
613 * "git-xxxx" is the same as "git xxxx", but we obviously:
614 *
615 * - cannot take flags in between the "git" and the "xxxx".
616 * - cannot execute it externally (since it would just do
617 * the same thing over again)
618 *
619 * So we just directly call the builtin handler, and die if
620 * that one cannot handle it.
621 */
622 if (skip_prefix(cmd, "git-", &cmd)) {
623 argv[0] = cmd;
624 handle_builtin(argc, argv);
625 die("cannot handle %s as a builtin", cmd);
626 }
627 /* Look for flags.. */
629 argv++;
630 argc--;
631 handle_options(&argv, &argc, NULL);
632 if (argc > 0) {
633 /* translate --help and --version into commands */
634 skip_prefix(argv[0], "--", &argv[0]);
635 } else {
636 /* The user didn't specify a command; give them help */
637 commit_pager_choice();
638 printf("usage: %s\n\n", git_usage_string);
639 list_common_cmds_help();
640 printf("\n%s\n", _(git_more_info_string));
641 exit(1);
642 }
643 cmd = argv[0];
644 /*
646 * We use PATH to find git commands, but we prepend some higher
647 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
648 * environment, and the $(gitexecdir) from the Makefile at build
649 * time.
650 */
651 setup_path();
652 while (1) {
654 int was_alias = run_argv(&argc, &argv);
655 if (errno != ENOENT)
656 break;
657 if (was_alias) {
658 fprintf(stderr, "Expansion of alias '%s' failed; "
659 "'%s' is not a git command\n",
660 cmd, argv[0]);
661 exit(1);
662 }
663 if (!done_help) {
664 cmd = argv[0] = help_unknown_cmd(cmd);
665 done_help = 1;
666 } else
667 break;
668 }
669 fprintf(stderr, "Failed to run command '%s': %s\n",
671 cmd, strerror(errno));
672 return 1;
674}