1#include "builtin.h"
2#include "config.h"
3#include "exec_cmd.h"
4#include "help.h"
5#include "run-command.h"
6const char git_usage_string[] =
8 "git [--version] [--help] [-C <path>] [-c name=value]\n"
9 " [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
10 " [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]\n"
11 " [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
12 " <command> [<args>]";
13const char git_more_info_string[] =
15 N_("'git help -a' and 'git help -g' list available subcommands and some\n"
16 "concept guides. See 'git help <command>' or 'git help <concept>'\n"
17 "to read about a specific subcommand or concept.");
18static int use_pager = -1;
20static void commit_pager_choice(void) {
22 switch (use_pager) {
23 case 0:
24 setenv("GIT_PAGER", "cat", 1);
25 break;
26 case 1:
27 setup_pager();
28 break;
29 default:
30 break;
31 }
32}
33static int handle_options(const char ***argv, int *argc, int *envchanged)
35{
36 const char **orig_argv = *argv;
37 while (*argc > 0) {
39 const char *cmd = (*argv)[0];
40 if (cmd[0] != '-')
41 break;
42 /*
44 * For legacy reasons, the "version" and "help"
45 * commands can be written with "--" prepended
46 * to make them look like flags.
47 */
48 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
49 break;
50 /*
52 * Check remaining flags.
53 */
54 if (skip_prefix(cmd, "--exec-path", &cmd)) {
55 if (*cmd == '=')
56 git_set_argv_exec_path(cmd + 1);
57 else {
58 puts(git_exec_path());
59 exit(0);
60 }
61 } else if (!strcmp(cmd, "--html-path")) {
62 puts(system_path(GIT_HTML_PATH));
63 exit(0);
64 } else if (!strcmp(cmd, "--man-path")) {
65 puts(system_path(GIT_MAN_PATH));
66 exit(0);
67 } else if (!strcmp(cmd, "--info-path")) {
68 puts(system_path(GIT_INFO_PATH));
69 exit(0);
70 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
71 use_pager = 1;
72 } else if (!strcmp(cmd, "--no-pager")) {
73 use_pager = 0;
74 if (envchanged)
75 *envchanged = 1;
76 } else if (!strcmp(cmd, "--no-replace-objects")) {
77 check_replace_refs = 0;
78 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
79 if (envchanged)
80 *envchanged = 1;
81 } else if (!strcmp(cmd, "--git-dir")) {
82 if (*argc < 2) {
83 fprintf(stderr, "No directory given for --git-dir.\n" );
84 usage(git_usage_string);
85 }
86 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
87 if (envchanged)
88 *envchanged = 1;
89 (*argv)++;
90 (*argc)--;
91 } else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
92 setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
93 if (envchanged)
94 *envchanged = 1;
95 } else if (!strcmp(cmd, "--namespace")) {
96 if (*argc < 2) {
97 fprintf(stderr, "No namespace given for --namespace.\n" );
98 usage(git_usage_string);
99 }
100 setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
101 if (envchanged)
102 *envchanged = 1;
103 (*argv)++;
104 (*argc)--;
105 } else if (skip_prefix(cmd, "--namespace=", &cmd)) {
106 setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
107 if (envchanged)
108 *envchanged = 1;
109 } else if (!strcmp(cmd, "--work-tree")) {
110 if (*argc < 2) {
111 fprintf(stderr, "No directory given for --work-tree.\n" );
112 usage(git_usage_string);
113 }
114 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
115 if (envchanged)
116 *envchanged = 1;
117 (*argv)++;
118 (*argc)--;
119 } else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
120 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
121 if (envchanged)
122 *envchanged = 1;
123 } else if (!strcmp(cmd, "--super-prefix")) {
124 if (*argc < 2) {
125 fprintf(stderr, "No prefix given for --super-prefix.\n" );
126 usage(git_usage_string);
127 }
128 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, (*argv)[1], 1);
129 if (envchanged)
130 *envchanged = 1;
131 (*argv)++;
132 (*argc)--;
133 } else if (skip_prefix(cmd, "--super-prefix=", &cmd)) {
134 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, cmd, 1);
135 if (envchanged)
136 *envchanged = 1;
137 } else if (!strcmp(cmd, "--bare")) {
138 char *cwd = xgetcwd();
139 is_bare_repository_cfg = 1;
140 setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
141 free(cwd);
142 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
143 if (envchanged)
144 *envchanged = 1;
145 } else if (!strcmp(cmd, "-c")) {
146 if (*argc < 2) {
147 fprintf(stderr, "-c expects a configuration string\n" );
148 usage(git_usage_string);
149 }
150 git_config_push_parameter((*argv)[1]);
151 (*argv)++;
152 (*argc)--;
153 } else if (!strcmp(cmd, "--literal-pathspecs")) {
154 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
155 if (envchanged)
156 *envchanged = 1;
157 } else if (!strcmp(cmd, "--no-literal-pathspecs")) {
158 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
159 if (envchanged)
160 *envchanged = 1;
161 } else if (!strcmp(cmd, "--glob-pathspecs")) {
162 setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
163 if (envchanged)
164 *envchanged = 1;
165 } else if (!strcmp(cmd, "--noglob-pathspecs")) {
166 setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
167 if (envchanged)
168 *envchanged = 1;
169 } else if (!strcmp(cmd, "--icase-pathspecs")) {
170 setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
171 if (envchanged)
172 *envchanged = 1;
173 } else if (!strcmp(cmd, "--shallow-file")) {
174 (*argv)++;
175 (*argc)--;
176 set_alternate_shallow_file((*argv)[0], 1);
177 if (envchanged)
178 *envchanged = 1;
179 } else if (!strcmp(cmd, "-C")) {
180 if (*argc < 2) {
181 fprintf(stderr, "No directory given for -C.\n" );
182 usage(git_usage_string);
183 }
184 if ((*argv)[1][0]) {
185 if (chdir((*argv)[1]))
186 die_errno("Cannot change to '%s'", (*argv)[1]);
187 if (envchanged)
188 *envchanged = 1;
189 }
190 (*argv)++;
191 (*argc)--;
192 } else {
193 fprintf(stderr, "Unknown option: %s\n", cmd);
194 usage(git_usage_string);
195 }
196 (*argv)++;
198 (*argc)--;
199 }
200 return (*argv) - orig_argv;
201}
202static int handle_alias(int *argcp, const char ***argv)
204{
205 int envchanged = 0, ret = 0, saved_errno = errno;
206 int count, option_count;
207 const char **new_argv;
208 const char *alias_command;
209 char *alias_string;
210 alias_command = (*argv)[0];
212 alias_string = alias_lookup(alias_command);
213 if (alias_string) {
214 if (alias_string[0] == '!') {
215 struct child_process child = CHILD_PROCESS_INIT;
216 int nongit_ok;
217 /* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
219 setup_git_directory_gently(&nongit_ok);
220 commit_pager_choice();
222 child.use_shell = 1;
224 argv_array_push(&child.args, alias_string + 1);
225 argv_array_pushv(&child.args, (*argv) + 1);
226 ret = run_command(&child);
228 if (ret >= 0) /* normal exit */
229 exit(ret);
230 die_errno("While expanding alias '%s': '%s'",
232 alias_command, alias_string + 1);
233 }
234 count = split_cmdline(alias_string, &new_argv);
235 if (count < 0)
236 die("Bad alias.%s string: %s", alias_command,
237 split_cmdline_strerror(count));
238 option_count = handle_options(&new_argv, &count, &envchanged);
239 if (envchanged)
240 die("alias '%s' changes environment variables\n"
241 "You can use '!git' in the alias to do this.",
242 alias_command);
243 memmove(new_argv - option_count, new_argv,
244 count * sizeof(char *));
245 new_argv -= option_count;
246 if (count < 1)
248 die("empty alias for %s", alias_command);
249 if (!strcmp(alias_command, new_argv[0]))
251 die("recursive alias: %s", alias_command);
252 trace_argv_printf(new_argv,
254 "trace: alias expansion: %s =>",
255 alias_command);
256 REALLOC_ARRAY(new_argv, count + *argcp);
258 /* insert after command name */
259 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
260 *argv = new_argv;
262 *argcp += count - 1;
263 ret = 1;
265 }
266 errno = saved_errno;
268 return ret;
270}
271#define RUN_SETUP (1<<0)
273#define RUN_SETUP_GENTLY (1<<1)
274#define USE_PAGER (1<<2)
275/*
276 * require working tree to be present -- anything uses this needs
277 * RUN_SETUP for reading from the configuration file.
278 */
279#define NEED_WORK_TREE (1<<3)
280#define SUPPORT_SUPER_PREFIX (1<<4)
281struct cmd_struct {
283 const char *cmd;
284 int (*fn)(int, const char **, const char *);
285 int option;
286};
287static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
289{
290 int status, help;
291 struct stat st;
292 const char *prefix;
293 prefix = NULL;
295 help = argc == 2 && !strcmp(argv[1], "-h");
296 if (!help) {
297 if (p->option & RUN_SETUP)
298 prefix = setup_git_directory();
299 else if (p->option & RUN_SETUP_GENTLY) {
300 int nongit_ok;
301 prefix = setup_git_directory_gently(&nongit_ok);
302 }
303 if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY))
305 use_pager = check_pager_config(p->cmd);
306 if (use_pager == -1 && p->option & USE_PAGER)
307 use_pager = 1;
308 if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
310 startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
311 trace_repo_setup(prefix);
312 }
313 commit_pager_choice();
314 if (!help && get_super_prefix()) {
316 if (!(p->option & SUPPORT_SUPER_PREFIX))
317 die("%s doesn't support --super-prefix", p->cmd);
318 }
319 if (!help && p->option & NEED_WORK_TREE)
321 setup_work_tree();
322 trace_argv_printf(argv, "trace: built-in: git");
324 status = p->fn(argc, argv, prefix);
326 if (status)
327 return status;
328 /* Somebody closed stdout? */
330 if (fstat(fileno(stdout), &st))
331 return 0;
332 /* Ignore write errors for pipes and sockets.. */
333 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
334 return 0;
335 /* Check for ENOSPC and EIO errors.. */
337 if (fflush(stdout))
338 die_errno("write failure on standard output");
339 if (ferror(stdout))
340 die("unknown write failure on standard output");
341 if (fclose(stdout))
342 die_errno("close failed on standard output");
343 return 0;
344}
345static struct cmd_struct commands[] = {
347 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
348 { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
349 { "annotate", cmd_annotate, RUN_SETUP },
350 { "apply", cmd_apply, RUN_SETUP_GENTLY },
351 { "archive", cmd_archive, RUN_SETUP_GENTLY },
352 { "bisect--helper", cmd_bisect__helper, RUN_SETUP },
353 { "blame", cmd_blame, RUN_SETUP },
354 { "branch", cmd_branch, RUN_SETUP },
355 { "bundle", cmd_bundle, RUN_SETUP_GENTLY },
356 { "cat-file", cmd_cat_file, RUN_SETUP },
357 { "check-attr", cmd_check_attr, RUN_SETUP },
358 { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
359 { "check-mailmap", cmd_check_mailmap, RUN_SETUP },
360 { "check-ref-format", cmd_check_ref_format },
361 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
362 { "checkout-index", cmd_checkout_index,
363 RUN_SETUP | NEED_WORK_TREE},
364 { "cherry", cmd_cherry, RUN_SETUP },
365 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
366 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
367 { "clone", cmd_clone },
368 { "column", cmd_column, RUN_SETUP_GENTLY },
369 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
370 { "commit-tree", cmd_commit_tree, RUN_SETUP },
371 { "config", cmd_config, RUN_SETUP_GENTLY },
372 { "count-objects", cmd_count_objects, RUN_SETUP },
373 { "credential", cmd_credential, RUN_SETUP_GENTLY },
374 { "describe", cmd_describe, RUN_SETUP },
375 { "diff", cmd_diff },
376 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
377 { "diff-index", cmd_diff_index, RUN_SETUP },
378 { "diff-tree", cmd_diff_tree, RUN_SETUP },
379 { "difftool", cmd_difftool, RUN_SETUP | NEED_WORK_TREE },
380 { "fast-export", cmd_fast_export, RUN_SETUP },
381 { "fetch", cmd_fetch, RUN_SETUP },
382 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
383 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
384 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
385 { "format-patch", cmd_format_patch, RUN_SETUP },
386 { "fsck", cmd_fsck, RUN_SETUP },
387 { "fsck-objects", cmd_fsck, RUN_SETUP },
388 { "gc", cmd_gc, RUN_SETUP },
389 { "get-tar-commit-id", cmd_get_tar_commit_id },
390 { "grep", cmd_grep, RUN_SETUP_GENTLY | SUPPORT_SUPER_PREFIX },
391 { "hash-object", cmd_hash_object },
392 { "help", cmd_help },
393 { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
394 { "init", cmd_init_db },
395 { "init-db", cmd_init_db },
396 { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
397 { "log", cmd_log, RUN_SETUP },
398 { "ls-files", cmd_ls_files, RUN_SETUP | SUPPORT_SUPER_PREFIX },
399 { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
400 { "ls-tree", cmd_ls_tree, RUN_SETUP },
401 { "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY },
402 { "mailsplit", cmd_mailsplit },
403 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
404 { "merge-base", cmd_merge_base, RUN_SETUP },
405 { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
406 { "merge-index", cmd_merge_index, RUN_SETUP },
407 { "merge-ours", cmd_merge_ours, RUN_SETUP },
408 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
409 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
410 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
411 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
412 { "merge-tree", cmd_merge_tree, RUN_SETUP },
413 { "mktag", cmd_mktag, RUN_SETUP },
414 { "mktree", cmd_mktree, RUN_SETUP },
415 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
416 { "name-rev", cmd_name_rev, RUN_SETUP },
417 { "notes", cmd_notes, RUN_SETUP },
418 { "pack-objects", cmd_pack_objects, RUN_SETUP },
419 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
420 { "pack-refs", cmd_pack_refs, RUN_SETUP },
421 { "patch-id", cmd_patch_id, RUN_SETUP_GENTLY },
422 { "pickaxe", cmd_blame, RUN_SETUP },
423 { "prune", cmd_prune, RUN_SETUP },
424 { "prune-packed", cmd_prune_packed, RUN_SETUP },
425 { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
426 { "push", cmd_push, RUN_SETUP },
427 { "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX},
428 { "rebase--helper", cmd_rebase__helper, RUN_SETUP | NEED_WORK_TREE },
429 { "receive-pack", cmd_receive_pack },
430 { "reflog", cmd_reflog, RUN_SETUP },
431 { "remote", cmd_remote, RUN_SETUP },
432 { "remote-ext", cmd_remote_ext },
433 { "remote-fd", cmd_remote_fd },
434 { "repack", cmd_repack, RUN_SETUP },
435 { "replace", cmd_replace, RUN_SETUP },
436 { "rerere", cmd_rerere, RUN_SETUP },
437 { "reset", cmd_reset, RUN_SETUP },
438 { "rev-list", cmd_rev_list, RUN_SETUP },
439 { "rev-parse", cmd_rev_parse },
440 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
441 { "rm", cmd_rm, RUN_SETUP },
442 { "send-pack", cmd_send_pack, RUN_SETUP },
443 { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
444 { "show", cmd_show, RUN_SETUP },
445 { "show-branch", cmd_show_branch, RUN_SETUP },
446 { "show-ref", cmd_show_ref, RUN_SETUP },
447 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
448 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
449 { "stripspace", cmd_stripspace },
450 { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX},
451 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
452 { "tag", cmd_tag, RUN_SETUP },
453 { "unpack-file", cmd_unpack_file, RUN_SETUP },
454 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
455 { "update-index", cmd_update_index, RUN_SETUP },
456 { "update-ref", cmd_update_ref, RUN_SETUP },
457 { "update-server-info", cmd_update_server_info, RUN_SETUP },
458 { "upload-archive", cmd_upload_archive },
459 { "upload-archive--writer", cmd_upload_archive_writer },
460 { "var", cmd_var, RUN_SETUP_GENTLY },
461 { "verify-commit", cmd_verify_commit, RUN_SETUP },
462 { "verify-pack", cmd_verify_pack },
463 { "verify-tag", cmd_verify_tag, RUN_SETUP },
464 { "version", cmd_version },
465 { "whatchanged", cmd_whatchanged, RUN_SETUP },
466 { "worktree", cmd_worktree, RUN_SETUP },
467 { "write-tree", cmd_write_tree, RUN_SETUP },
468};
469static struct cmd_struct *get_builtin(const char *s)
471{
472 int i;
473 for (i = 0; i < ARRAY_SIZE(commands); i++) {
474 struct cmd_struct *p = commands + i;
475 if (!strcmp(s, p->cmd))
476 return p;
477 }
478 return NULL;
479}
480int is_builtin(const char *s)
482{
483 return !!get_builtin(s);
484}
485#ifdef STRIP_EXTENSION
487static void strip_extension(const char **argv)
488{
489 size_t len;
490 if (strip_suffix(argv[0], STRIP_EXTENSION, &len))
492 argv[0] = xmemdupz(argv[0], len);
493}
494#else
495#define strip_extension(cmd)
496#endif
497static void handle_builtin(int argc, const char **argv)
499{
500 struct argv_array args = ARGV_ARRAY_INIT;
501 const char *cmd;
502 struct cmd_struct *builtin;
503 strip_extension(argv);
505 cmd = argv[0];
506 /* Turn "git cmd --help" into "git help --exclude-guides cmd" */
508 if (argc > 1 && !strcmp(argv[1], "--help")) {
509 int i;
510 argv[1] = argv[0];
512 argv[0] = cmd = "help";
513 for (i = 0; i < argc; i++) {
515 argv_array_push(&args, argv[i]);
516 if (!i)
517 argv_array_push(&args, "--exclude-guides");
518 }
519 argc++;
521 argv = args.argv;
522 }
523 builtin = get_builtin(cmd);
525 if (builtin)
526 exit(run_builtin(builtin, argc, argv));
527 argv_array_clear(&args);
528}
529static void execv_dashed_external(const char **argv)
531{
532 struct child_process cmd = CHILD_PROCESS_INIT;
533 int status;
534 if (get_super_prefix())
536 die("%s doesn't support --super-prefix", argv[0]);
537 if (use_pager == -1)
539 use_pager = check_pager_config(argv[0]);
540 commit_pager_choice();
541 argv_array_pushf(&cmd.args, "git-%s", argv[0]);
543 argv_array_pushv(&cmd.args, argv + 1);
544 cmd.clean_on_exit = 1;
545 cmd.wait_after_clean = 1;
546 cmd.silent_exec_failure = 1;
547 trace_argv_printf(cmd.args.argv, "trace: exec:");
549 /*
551 * If we fail because the command is not found, it is
552 * OK to return. Otherwise, we just pass along the status code,
553 * or our usual generic code if we were not even able to exec
554 * the program.
555 */
556 status = run_command(&cmd);
557 if (status >= 0)
558 exit(status);
559 else if (errno != ENOENT)
560 exit(128);
561}
562static int run_argv(int *argcp, const char ***argv)
564{
565 int done_alias = 0;
566 while (1) {
568 /*
569 * If we tried alias and futzed with our environment,
570 * it no longer is safe to invoke builtins directly in
571 * general. We have to spawn them as dashed externals.
572 *
573 * NEEDSWORK: if we can figure out cases
574 * where it is safe to do, we can avoid spawning a new
575 * process.
576 */
577 if (!done_alias)
578 handle_builtin(*argcp, *argv);
579 /* .. then try the external ones */
581 execv_dashed_external(*argv);
582 /* It could be an alias -- this works around the insanity
584 * of overriding "git log" with "git show" by having
585 * alias.log = show
586 */
587 if (done_alias)
588 break;
589 if (!handle_alias(argcp, argv))
590 break;
591 done_alias = 1;
592 }
593 return done_alias;
595}
596int cmd_main(int argc, const char **argv)
598{
599 const char *cmd;
600 int done_help = 0;
601 cmd = argv[0];
603 if (!cmd)
604 cmd = "git-help";
605 else {
606 const char *slash = find_last_dir_sep(cmd);
607 if (slash)
608 cmd = slash + 1;
609 }
610 trace_command_performance(argv);
612 /*
614 * "git-xxxx" is the same as "git xxxx", but we obviously:
615 *
616 * - cannot take flags in between the "git" and the "xxxx".
617 * - cannot execute it externally (since it would just do
618 * the same thing over again)
619 *
620 * So we just directly call the builtin handler, and die if
621 * that one cannot handle it.
622 */
623 if (skip_prefix(cmd, "git-", &cmd)) {
624 argv[0] = cmd;
625 handle_builtin(argc, argv);
626 die("cannot handle %s as a builtin", cmd);
627 }
628 /* Look for flags.. */
630 argv++;
631 argc--;
632 handle_options(&argv, &argc, NULL);
633 if (argc > 0) {
634 /* translate --help and --version into commands */
635 skip_prefix(argv[0], "--", &argv[0]);
636 } else {
637 /* The user didn't specify a command; give them help */
638 commit_pager_choice();
639 printf("usage: %s\n\n", git_usage_string);
640 list_common_cmds_help();
641 printf("\n%s\n", _(git_more_info_string));
642 exit(1);
643 }
644 cmd = argv[0];
645 /*
647 * We use PATH to find git commands, but we prepend some higher
648 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
649 * environment, and the $(gitexecdir) from the Makefile at build
650 * time.
651 */
652 setup_path();
653 while (1) {
655 int was_alias = run_argv(&argc, &argv);
656 if (errno != ENOENT)
657 break;
658 if (was_alias) {
659 fprintf(stderr, "Expansion of alias '%s' failed; "
660 "'%s' is not a git command\n",
661 cmd, argv[0]);
662 exit(1);
663 }
664 if (!done_help) {
665 cmd = argv[0] = help_unknown_cmd(cmd);
666 done_help = 1;
667 } else
668 break;
669 }
670 fprintf(stderr, "Failed to run command '%s': %s\n",
672 cmd, strerror(errno));
673 return 1;
675}