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 list_builtins(void);
21static void commit_pager_choice(void) {
23 switch (use_pager) {
24 case 0:
25 setenv("GIT_PAGER", "cat", 1);
26 break;
27 case 1:
28 setup_pager();
29 break;
30 default:
31 break;
32 }
33}
34static int handle_options(const char ***argv, int *argc, int *envchanged)
36{
37 const char **orig_argv = *argv;
38 while (*argc > 0) {
40 const char *cmd = (*argv)[0];
41 if (cmd[0] != '-')
42 break;
43 /*
45 * For legacy reasons, the "version" and "help"
46 * commands can be written with "--" prepended
47 * to make them look like flags.
48 */
49 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
50 break;
51 /*
53 * Check remaining flags.
54 */
55 if (skip_prefix(cmd, "--exec-path", &cmd)) {
56 if (*cmd == '=')
57 git_set_argv_exec_path(cmd + 1);
58 else {
59 puts(git_exec_path());
60 exit(0);
61 }
62 } else if (!strcmp(cmd, "--html-path")) {
63 puts(system_path(GIT_HTML_PATH));
64 exit(0);
65 } else if (!strcmp(cmd, "--man-path")) {
66 puts(system_path(GIT_MAN_PATH));
67 exit(0);
68 } else if (!strcmp(cmd, "--info-path")) {
69 puts(system_path(GIT_INFO_PATH));
70 exit(0);
71 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
72 use_pager = 1;
73 } else if (!strcmp(cmd, "--no-pager")) {
74 use_pager = 0;
75 if (envchanged)
76 *envchanged = 1;
77 } else if (!strcmp(cmd, "--no-replace-objects")) {
78 check_replace_refs = 0;
79 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
80 if (envchanged)
81 *envchanged = 1;
82 } else if (!strcmp(cmd, "--git-dir")) {
83 if (*argc < 2) {
84 fprintf(stderr, "No directory given for --git-dir.\n" );
85 usage(git_usage_string);
86 }
87 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
88 if (envchanged)
89 *envchanged = 1;
90 (*argv)++;
91 (*argc)--;
92 } else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
93 setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
94 if (envchanged)
95 *envchanged = 1;
96 } else if (!strcmp(cmd, "--namespace")) {
97 if (*argc < 2) {
98 fprintf(stderr, "No namespace given for --namespace.\n" );
99 usage(git_usage_string);
100 }
101 setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
102 if (envchanged)
103 *envchanged = 1;
104 (*argv)++;
105 (*argc)--;
106 } else if (skip_prefix(cmd, "--namespace=", &cmd)) {
107 setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
108 if (envchanged)
109 *envchanged = 1;
110 } else if (!strcmp(cmd, "--work-tree")) {
111 if (*argc < 2) {
112 fprintf(stderr, "No directory given for --work-tree.\n" );
113 usage(git_usage_string);
114 }
115 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
116 if (envchanged)
117 *envchanged = 1;
118 (*argv)++;
119 (*argc)--;
120 } else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
121 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
122 if (envchanged)
123 *envchanged = 1;
124 } else if (!strcmp(cmd, "--super-prefix")) {
125 if (*argc < 2) {
126 fprintf(stderr, "No prefix given for --super-prefix.\n" );
127 usage(git_usage_string);
128 }
129 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, (*argv)[1], 1);
130 if (envchanged)
131 *envchanged = 1;
132 (*argv)++;
133 (*argc)--;
134 } else if (skip_prefix(cmd, "--super-prefix=", &cmd)) {
135 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, cmd, 1);
136 if (envchanged)
137 *envchanged = 1;
138 } else if (!strcmp(cmd, "--bare")) {
139 char *cwd = xgetcwd();
140 is_bare_repository_cfg = 1;
141 setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
142 free(cwd);
143 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
144 if (envchanged)
145 *envchanged = 1;
146 } else if (!strcmp(cmd, "-c")) {
147 if (*argc < 2) {
148 fprintf(stderr, "-c expects a configuration string\n" );
149 usage(git_usage_string);
150 }
151 git_config_push_parameter((*argv)[1]);
152 (*argv)++;
153 (*argc)--;
154 } else if (!strcmp(cmd, "--literal-pathspecs")) {
155 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
156 if (envchanged)
157 *envchanged = 1;
158 } else if (!strcmp(cmd, "--no-literal-pathspecs")) {
159 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
160 if (envchanged)
161 *envchanged = 1;
162 } else if (!strcmp(cmd, "--glob-pathspecs")) {
163 setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
164 if (envchanged)
165 *envchanged = 1;
166 } else if (!strcmp(cmd, "--noglob-pathspecs")) {
167 setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
168 if (envchanged)
169 *envchanged = 1;
170 } else if (!strcmp(cmd, "--icase-pathspecs")) {
171 setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
172 if (envchanged)
173 *envchanged = 1;
174 } else if (!strcmp(cmd, "--shallow-file")) {
175 (*argv)++;
176 (*argc)--;
177 set_alternate_shallow_file((*argv)[0], 1);
178 if (envchanged)
179 *envchanged = 1;
180 } else if (!strcmp(cmd, "-C")) {
181 if (*argc < 2) {
182 fprintf(stderr, "No directory given for -C.\n" );
183 usage(git_usage_string);
184 }
185 if ((*argv)[1][0]) {
186 if (chdir((*argv)[1]))
187 die_errno("Cannot change to '%s'", (*argv)[1]);
188 if (envchanged)
189 *envchanged = 1;
190 }
191 (*argv)++;
192 (*argc)--;
193 } else if (!strcmp(cmd, "--list-builtins")) {
194 list_builtins();
195 exit(0);
196 } else {
197 fprintf(stderr, "Unknown option: %s\n", cmd);
198 usage(git_usage_string);
199 }
200 (*argv)++;
202 (*argc)--;
203 }
204 return (*argv) - orig_argv;
205}
206static int handle_alias(int *argcp, const char ***argv)
208{
209 int envchanged = 0, ret = 0, saved_errno = errno;
210 int count, option_count;
211 const char **new_argv;
212 const char *alias_command;
213 char *alias_string;
214 alias_command = (*argv)[0];
216 alias_string = alias_lookup(alias_command);
217 if (alias_string) {
218 if (alias_string[0] == '!') {
219 struct child_process child = CHILD_PROCESS_INIT;
220 int nongit_ok;
221 /* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
223 setup_git_directory_gently(&nongit_ok);
224 commit_pager_choice();
226 child.use_shell = 1;
228 argv_array_push(&child.args, alias_string + 1);
229 argv_array_pushv(&child.args, (*argv) + 1);
230 ret = run_command(&child);
232 if (ret >= 0) /* normal exit */
233 exit(ret);
234 die_errno("While expanding alias '%s': '%s'",
236 alias_command, alias_string + 1);
237 }
238 count = split_cmdline(alias_string, &new_argv);
239 if (count < 0)
240 die("Bad alias.%s string: %s", alias_command,
241 split_cmdline_strerror(count));
242 option_count = handle_options(&new_argv, &count, &envchanged);
243 if (envchanged)
244 die("alias '%s' changes environment variables\n"
245 "You can use '!git' in the alias to do this.",
246 alias_command);
247 memmove(new_argv - option_count, new_argv,
248 count * sizeof(char *));
249 new_argv -= option_count;
250 if (count < 1)
252 die("empty alias for %s", alias_command);
253 if (!strcmp(alias_command, new_argv[0]))
255 die("recursive alias: %s", alias_command);
256 trace_argv_printf(new_argv,
258 "trace: alias expansion: %s =>",
259 alias_command);
260 REALLOC_ARRAY(new_argv, count + *argcp);
262 /* insert after command name */
263 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
264 *argv = new_argv;
266 *argcp += count - 1;
267 ret = 1;
269 }
270 errno = saved_errno;
272 return ret;
274}
275#define RUN_SETUP (1<<0)
277#define RUN_SETUP_GENTLY (1<<1)
278#define USE_PAGER (1<<2)
279/*
280 * require working tree to be present -- anything uses this needs
281 * RUN_SETUP for reading from the configuration file.
282 */
283#define NEED_WORK_TREE (1<<3)
284#define SUPPORT_SUPER_PREFIX (1<<4)
285struct cmd_struct {
287 const char *cmd;
288 int (*fn)(int, const char **, const char *);
289 int option;
290};
291static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
293{
294 int status, help;
295 struct stat st;
296 const char *prefix;
297 prefix = NULL;
299 help = argc == 2 && !strcmp(argv[1], "-h");
300 if (!help) {
301 if (p->option & RUN_SETUP)
302 prefix = setup_git_directory();
303 else if (p->option & RUN_SETUP_GENTLY) {
304 int nongit_ok;
305 prefix = setup_git_directory_gently(&nongit_ok);
306 }
307 if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY))
309 use_pager = check_pager_config(p->cmd);
310 if (use_pager == -1 && p->option & USE_PAGER)
311 use_pager = 1;
312 if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
314 startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
315 trace_repo_setup(prefix);
316 }
317 commit_pager_choice();
318 if (!help && get_super_prefix()) {
320 if (!(p->option & SUPPORT_SUPER_PREFIX))
321 die("%s doesn't support --super-prefix", p->cmd);
322 }
323 if (!help && p->option & NEED_WORK_TREE)
325 setup_work_tree();
326 trace_argv_printf(argv, "trace: built-in: git");
328 status = p->fn(argc, argv, prefix);
330 if (status)
331 return status;
332 /* Somebody closed stdout? */
334 if (fstat(fileno(stdout), &st))
335 return 0;
336 /* Ignore write errors for pipes and sockets.. */
337 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
338 return 0;
339 /* Check for ENOSPC and EIO errors.. */
341 if (fflush(stdout))
342 die_errno("write failure on standard output");
343 if (ferror(stdout))
344 die("unknown write failure on standard output");
345 if (fclose(stdout))
346 die_errno("close failed on standard output");
347 return 0;
348}
349static struct cmd_struct commands[] = {
351 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
352 { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
353 { "annotate", cmd_annotate, RUN_SETUP },
354 { "apply", cmd_apply, RUN_SETUP_GENTLY },
355 { "archive", cmd_archive, RUN_SETUP_GENTLY },
356 { "bisect--helper", cmd_bisect__helper, RUN_SETUP },
357 { "blame", cmd_blame, RUN_SETUP },
358 { "branch", cmd_branch, RUN_SETUP },
359 { "bundle", cmd_bundle, RUN_SETUP_GENTLY },
360 { "cat-file", cmd_cat_file, RUN_SETUP },
361 { "check-attr", cmd_check_attr, RUN_SETUP },
362 { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
363 { "check-mailmap", cmd_check_mailmap, RUN_SETUP },
364 { "check-ref-format", cmd_check_ref_format },
365 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
366 { "checkout-index", cmd_checkout_index,
367 RUN_SETUP | NEED_WORK_TREE},
368 { "cherry", cmd_cherry, RUN_SETUP },
369 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
370 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
371 { "clone", cmd_clone },
372 { "column", cmd_column, RUN_SETUP_GENTLY },
373 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
374 { "commit-tree", cmd_commit_tree, RUN_SETUP },
375 { "config", cmd_config, RUN_SETUP_GENTLY },
376 { "count-objects", cmd_count_objects, RUN_SETUP },
377 { "credential", cmd_credential, RUN_SETUP_GENTLY },
378 { "describe", cmd_describe, RUN_SETUP },
379 { "diff", cmd_diff },
380 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
381 { "diff-index", cmd_diff_index, RUN_SETUP },
382 { "diff-tree", cmd_diff_tree, RUN_SETUP },
383 { "difftool", cmd_difftool, RUN_SETUP | NEED_WORK_TREE },
384 { "fast-export", cmd_fast_export, RUN_SETUP },
385 { "fetch", cmd_fetch, RUN_SETUP },
386 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
387 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
388 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
389 { "format-patch", cmd_format_patch, RUN_SETUP },
390 { "fsck", cmd_fsck, RUN_SETUP },
391 { "fsck-objects", cmd_fsck, RUN_SETUP },
392 { "gc", cmd_gc, RUN_SETUP },
393 { "get-tar-commit-id", cmd_get_tar_commit_id },
394 { "grep", cmd_grep, RUN_SETUP_GENTLY | SUPPORT_SUPER_PREFIX },
395 { "hash-object", cmd_hash_object },
396 { "help", cmd_help },
397 { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
398 { "init", cmd_init_db },
399 { "init-db", cmd_init_db },
400 { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
401 { "log", cmd_log, RUN_SETUP },
402 { "ls-files", cmd_ls_files, RUN_SETUP | SUPPORT_SUPER_PREFIX },
403 { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
404 { "ls-tree", cmd_ls_tree, RUN_SETUP },
405 { "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY },
406 { "mailsplit", cmd_mailsplit },
407 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
408 { "merge-base", cmd_merge_base, RUN_SETUP },
409 { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
410 { "merge-index", cmd_merge_index, RUN_SETUP },
411 { "merge-ours", cmd_merge_ours, RUN_SETUP },
412 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
413 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
414 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
415 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
416 { "merge-tree", cmd_merge_tree, RUN_SETUP },
417 { "mktag", cmd_mktag, RUN_SETUP },
418 { "mktree", cmd_mktree, RUN_SETUP },
419 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
420 { "name-rev", cmd_name_rev, RUN_SETUP },
421 { "notes", cmd_notes, RUN_SETUP },
422 { "pack-objects", cmd_pack_objects, RUN_SETUP },
423 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
424 { "pack-refs", cmd_pack_refs, RUN_SETUP },
425 { "patch-id", cmd_patch_id, RUN_SETUP_GENTLY },
426 { "pickaxe", cmd_blame, RUN_SETUP },
427 { "prune", cmd_prune, RUN_SETUP },
428 { "prune-packed", cmd_prune_packed, RUN_SETUP },
429 { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
430 { "push", cmd_push, RUN_SETUP },
431 { "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX},
432 { "rebase--helper", cmd_rebase__helper, RUN_SETUP | NEED_WORK_TREE },
433 { "receive-pack", cmd_receive_pack },
434 { "reflog", cmd_reflog, RUN_SETUP },
435 { "remote", cmd_remote, RUN_SETUP },
436 { "remote-ext", cmd_remote_ext },
437 { "remote-fd", cmd_remote_fd },
438 { "repack", cmd_repack, RUN_SETUP },
439 { "replace", cmd_replace, RUN_SETUP },
440 { "rerere", cmd_rerere, RUN_SETUP },
441 { "reset", cmd_reset, RUN_SETUP },
442 { "rev-list", cmd_rev_list, RUN_SETUP },
443 { "rev-parse", cmd_rev_parse },
444 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
445 { "rm", cmd_rm, RUN_SETUP },
446 { "send-pack", cmd_send_pack, RUN_SETUP },
447 { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
448 { "show", cmd_show, RUN_SETUP },
449 { "show-branch", cmd_show_branch, RUN_SETUP },
450 { "show-ref", cmd_show_ref, RUN_SETUP },
451 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
452 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
453 { "stripspace", cmd_stripspace },
454 { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX},
455 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
456 { "tag", cmd_tag, RUN_SETUP },
457 { "unpack-file", cmd_unpack_file, RUN_SETUP },
458 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
459 { "update-index", cmd_update_index, RUN_SETUP },
460 { "update-ref", cmd_update_ref, RUN_SETUP },
461 { "update-server-info", cmd_update_server_info, RUN_SETUP },
462 { "upload-archive", cmd_upload_archive },
463 { "upload-archive--writer", cmd_upload_archive_writer },
464 { "var", cmd_var, RUN_SETUP_GENTLY },
465 { "verify-commit", cmd_verify_commit, RUN_SETUP },
466 { "verify-pack", cmd_verify_pack },
467 { "verify-tag", cmd_verify_tag, RUN_SETUP },
468 { "version", cmd_version },
469 { "whatchanged", cmd_whatchanged, RUN_SETUP },
470 { "worktree", cmd_worktree, RUN_SETUP },
471 { "write-tree", cmd_write_tree, RUN_SETUP },
472};
473static struct cmd_struct *get_builtin(const char *s)
475{
476 int i;
477 for (i = 0; i < ARRAY_SIZE(commands); i++) {
478 struct cmd_struct *p = commands + i;
479 if (!strcmp(s, p->cmd))
480 return p;
481 }
482 return NULL;
483}
484int is_builtin(const char *s)
486{
487 return !!get_builtin(s);
488}
489static void list_builtins(void)
491{
492 int i;
493 for (i = 0; i < ARRAY_SIZE(commands); i++)
494 printf("%s\n", commands[i].cmd);
495}
496#ifdef STRIP_EXTENSION
498static void strip_extension(const char **argv)
499{
500 size_t len;
501 if (strip_suffix(argv[0], STRIP_EXTENSION, &len))
503 argv[0] = xmemdupz(argv[0], len);
504}
505#else
506#define strip_extension(cmd)
507#endif
508static void handle_builtin(int argc, const char **argv)
510{
511 struct argv_array args = ARGV_ARRAY_INIT;
512 const char *cmd;
513 struct cmd_struct *builtin;
514 strip_extension(argv);
516 cmd = argv[0];
517 /* Turn "git cmd --help" into "git help --exclude-guides cmd" */
519 if (argc > 1 && !strcmp(argv[1], "--help")) {
520 int i;
521 argv[1] = argv[0];
523 argv[0] = cmd = "help";
524 for (i = 0; i < argc; i++) {
526 argv_array_push(&args, argv[i]);
527 if (!i)
528 argv_array_push(&args, "--exclude-guides");
529 }
530 argc++;
532 argv = args.argv;
533 }
534 builtin = get_builtin(cmd);
536 if (builtin)
537 exit(run_builtin(builtin, argc, argv));
538 argv_array_clear(&args);
539}
540static void execv_dashed_external(const char **argv)
542{
543 struct child_process cmd = CHILD_PROCESS_INIT;
544 int status;
545 if (get_super_prefix())
547 die("%s doesn't support --super-prefix", argv[0]);
548 if (use_pager == -1)
550 use_pager = check_pager_config(argv[0]);
551 commit_pager_choice();
552 argv_array_pushf(&cmd.args, "git-%s", argv[0]);
554 argv_array_pushv(&cmd.args, argv + 1);
555 cmd.clean_on_exit = 1;
556 cmd.wait_after_clean = 1;
557 cmd.silent_exec_failure = 1;
558 trace_argv_printf(cmd.args.argv, "trace: exec:");
560 /*
562 * If we fail because the command is not found, it is
563 * OK to return. Otherwise, we just pass along the status code,
564 * or our usual generic code if we were not even able to exec
565 * the program.
566 */
567 status = run_command(&cmd);
568 if (status >= 0)
569 exit(status);
570 else if (errno != ENOENT)
571 exit(128);
572}
573static int run_argv(int *argcp, const char ***argv)
575{
576 int done_alias = 0;
577 while (1) {
579 /*
580 * If we tried alias and futzed with our environment,
581 * it no longer is safe to invoke builtins directly in
582 * general. We have to spawn them as dashed externals.
583 *
584 * NEEDSWORK: if we can figure out cases
585 * where it is safe to do, we can avoid spawning a new
586 * process.
587 */
588 if (!done_alias)
589 handle_builtin(*argcp, *argv);
590 /* .. then try the external ones */
592 execv_dashed_external(*argv);
593 /* It could be an alias -- this works around the insanity
595 * of overriding "git log" with "git show" by having
596 * alias.log = show
597 */
598 if (done_alias)
599 break;
600 if (!handle_alias(argcp, argv))
601 break;
602 done_alias = 1;
603 }
604 return done_alias;
606}
607int cmd_main(int argc, const char **argv)
609{
610 const char *cmd;
611 int done_help = 0;
612 cmd = argv[0];
614 if (!cmd)
615 cmd = "git-help";
616 else {
617 const char *slash = find_last_dir_sep(cmd);
618 if (slash)
619 cmd = slash + 1;
620 }
621 trace_command_performance(argv);
623 /*
625 * "git-xxxx" is the same as "git xxxx", but we obviously:
626 *
627 * - cannot take flags in between the "git" and the "xxxx".
628 * - cannot execute it externally (since it would just do
629 * the same thing over again)
630 *
631 * So we just directly call the builtin handler, and die if
632 * that one cannot handle it.
633 */
634 if (skip_prefix(cmd, "git-", &cmd)) {
635 argv[0] = cmd;
636 handle_builtin(argc, argv);
637 die("cannot handle %s as a builtin", cmd);
638 }
639 /* Look for flags.. */
641 argv++;
642 argc--;
643 handle_options(&argv, &argc, NULL);
644 if (argc > 0) {
645 /* translate --help and --version into commands */
646 skip_prefix(argv[0], "--", &argv[0]);
647 } else {
648 /* The user didn't specify a command; give them help */
649 commit_pager_choice();
650 printf("usage: %s\n\n", git_usage_string);
651 list_common_cmds_help();
652 printf("\n%s\n", _(git_more_info_string));
653 exit(1);
654 }
655 cmd = argv[0];
656 /*
658 * We use PATH to find git commands, but we prepend some higher
659 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
660 * environment, and the $(gitexecdir) from the Makefile at build
661 * time.
662 */
663 setup_path();
664 while (1) {
666 int was_alias = run_argv(&argc, &argv);
667 if (errno != ENOENT)
668 break;
669 if (was_alias) {
670 fprintf(stderr, "Expansion of alias '%s' failed; "
671 "'%s' is not a git command\n",
672 cmd, argv[0]);
673 exit(1);
674 }
675 if (!done_help) {
676 cmd = argv[0] = help_unknown_cmd(cmd);
677 done_help = 1;
678 } else
679 break;
680 }
681 fprintf(stderr, "Failed to run command '%s': %s\n",
683 cmd, strerror(errno));
684 return 1;
686}