wildmatch: remove unused wildopts parameter
[git.git] / git.c
blob1b8b7f51a65fa2a8e62d11d7ad99f19e2926977f
1 #include "builtin.h"
2 #include "exec_cmd.h"
3 #include "help.h"
4 #include "run-command.h"
6 const 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>]";
13 const 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.");
18 static int use_pager = -1;
19 static char *orig_cwd;
20 static const char *env_names[] = {
21 GIT_DIR_ENVIRONMENT,
22 GIT_WORK_TREE_ENVIRONMENT,
23 GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
24 GIT_PREFIX_ENVIRONMENT
26 static char *orig_env[4];
27 static int save_restore_env_balance;
29 static void list_builtins(void);
31 static void save_env_before_alias(void)
33 int i;
35 assert(save_restore_env_balance == 0);
36 save_restore_env_balance = 1;
37 orig_cwd = xgetcwd();
38 for (i = 0; i < ARRAY_SIZE(env_names); i++) {
39 orig_env[i] = getenv(env_names[i]);
40 orig_env[i] = xstrdup_or_null(orig_env[i]);
44 static void restore_env(int external_alias)
46 int i;
48 assert(save_restore_env_balance == 1);
49 save_restore_env_balance = 0;
50 if (!external_alias && orig_cwd && chdir(orig_cwd))
51 die_errno("could not move to %s", orig_cwd);
52 free(orig_cwd);
53 for (i = 0; i < ARRAY_SIZE(env_names); i++) {
54 if (external_alias &&
55 !strcmp(env_names[i], GIT_PREFIX_ENVIRONMENT))
56 continue;
57 if (orig_env[i]) {
58 setenv(env_names[i], orig_env[i], 1);
59 free(orig_env[i]);
60 } else {
61 unsetenv(env_names[i]);
66 static void commit_pager_choice(void) {
67 switch (use_pager) {
68 case 0:
69 setenv("GIT_PAGER", "cat", 1);
70 break;
71 case 1:
72 setup_pager();
73 break;
74 default:
75 break;
79 static int handle_options(const char ***argv, int *argc, int *envchanged)
81 const char **orig_argv = *argv;
83 while (*argc > 0) {
84 const char *cmd = (*argv)[0];
85 if (cmd[0] != '-')
86 break;
89 * For legacy reasons, the "version" and "help"
90 * commands can be written with "--" prepended
91 * to make them look like flags.
93 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
94 break;
97 * Check remaining flags.
99 if (skip_prefix(cmd, "--exec-path", &cmd)) {
100 if (*cmd == '=')
101 git_set_argv_exec_path(cmd + 1);
102 else {
103 puts(git_exec_path());
104 exit(0);
106 } else if (!strcmp(cmd, "--html-path")) {
107 puts(system_path(GIT_HTML_PATH));
108 exit(0);
109 } else if (!strcmp(cmd, "--man-path")) {
110 puts(system_path(GIT_MAN_PATH));
111 exit(0);
112 } else if (!strcmp(cmd, "--info-path")) {
113 puts(system_path(GIT_INFO_PATH));
114 exit(0);
115 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
116 use_pager = 1;
117 } else if (!strcmp(cmd, "--no-pager")) {
118 use_pager = 0;
119 if (envchanged)
120 *envchanged = 1;
121 } else if (!strcmp(cmd, "--no-replace-objects")) {
122 check_replace_refs = 0;
123 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
124 if (envchanged)
125 *envchanged = 1;
126 } else if (!strcmp(cmd, "--git-dir")) {
127 if (*argc < 2) {
128 fprintf(stderr, "No directory given for --git-dir.\n" );
129 usage(git_usage_string);
131 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
132 if (envchanged)
133 *envchanged = 1;
134 (*argv)++;
135 (*argc)--;
136 } else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
137 setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
138 if (envchanged)
139 *envchanged = 1;
140 } else if (!strcmp(cmd, "--namespace")) {
141 if (*argc < 2) {
142 fprintf(stderr, "No namespace given for --namespace.\n" );
143 usage(git_usage_string);
145 setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
146 if (envchanged)
147 *envchanged = 1;
148 (*argv)++;
149 (*argc)--;
150 } else if (skip_prefix(cmd, "--namespace=", &cmd)) {
151 setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
152 if (envchanged)
153 *envchanged = 1;
154 } else if (!strcmp(cmd, "--work-tree")) {
155 if (*argc < 2) {
156 fprintf(stderr, "No directory given for --work-tree.\n" );
157 usage(git_usage_string);
159 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
160 if (envchanged)
161 *envchanged = 1;
162 (*argv)++;
163 (*argc)--;
164 } else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
165 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
166 if (envchanged)
167 *envchanged = 1;
168 } else if (!strcmp(cmd, "--super-prefix")) {
169 if (*argc < 2) {
170 fprintf(stderr, "No prefix given for --super-prefix.\n" );
171 usage(git_usage_string);
173 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, (*argv)[1], 1);
174 if (envchanged)
175 *envchanged = 1;
176 (*argv)++;
177 (*argc)--;
178 } else if (skip_prefix(cmd, "--super-prefix=", &cmd)) {
179 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, cmd, 1);
180 if (envchanged)
181 *envchanged = 1;
182 } else if (!strcmp(cmd, "--bare")) {
183 char *cwd = xgetcwd();
184 is_bare_repository_cfg = 1;
185 setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
186 free(cwd);
187 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
188 if (envchanged)
189 *envchanged = 1;
190 } else if (!strcmp(cmd, "-c")) {
191 if (*argc < 2) {
192 fprintf(stderr, "-c expects a configuration string\n" );
193 usage(git_usage_string);
195 git_config_push_parameter((*argv)[1]);
196 (*argv)++;
197 (*argc)--;
198 } else if (!strcmp(cmd, "--literal-pathspecs")) {
199 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
200 if (envchanged)
201 *envchanged = 1;
202 } else if (!strcmp(cmd, "--no-literal-pathspecs")) {
203 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
204 if (envchanged)
205 *envchanged = 1;
206 } else if (!strcmp(cmd, "--glob-pathspecs")) {
207 setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
208 if (envchanged)
209 *envchanged = 1;
210 } else if (!strcmp(cmd, "--noglob-pathspecs")) {
211 setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
212 if (envchanged)
213 *envchanged = 1;
214 } else if (!strcmp(cmd, "--icase-pathspecs")) {
215 setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
216 if (envchanged)
217 *envchanged = 1;
218 } else if (!strcmp(cmd, "--shallow-file")) {
219 (*argv)++;
220 (*argc)--;
221 set_alternate_shallow_file((*argv)[0], 1);
222 if (envchanged)
223 *envchanged = 1;
224 } else if (!strcmp(cmd, "-C")) {
225 if (*argc < 2) {
226 fprintf(stderr, "No directory given for -C.\n" );
227 usage(git_usage_string);
229 if ((*argv)[1][0]) {
230 if (chdir((*argv)[1]))
231 die_errno("Cannot change to '%s'", (*argv)[1]);
232 if (envchanged)
233 *envchanged = 1;
235 (*argv)++;
236 (*argc)--;
237 } else if (!strcmp(cmd, "--list-builtins")) {
238 list_builtins();
239 exit(0);
240 } else {
241 fprintf(stderr, "Unknown option: %s\n", cmd);
242 usage(git_usage_string);
245 (*argv)++;
246 (*argc)--;
248 return (*argv) - orig_argv;
251 static int handle_alias(int *argcp, const char ***argv)
253 int envchanged = 0, ret = 0, saved_errno = errno;
254 int count, option_count;
255 const char **new_argv;
256 const char *alias_command;
257 char *alias_string;
258 int unused_nongit;
260 save_env_before_alias();
261 setup_git_directory_gently(&unused_nongit);
263 alias_command = (*argv)[0];
264 alias_string = alias_lookup(alias_command);
265 if (alias_string) {
266 if (alias_string[0] == '!') {
267 struct child_process child = CHILD_PROCESS_INIT;
269 commit_pager_choice();
270 restore_env(1);
272 child.use_shell = 1;
273 argv_array_push(&child.args, alias_string + 1);
274 argv_array_pushv(&child.args, (*argv) + 1);
276 ret = run_command(&child);
277 if (ret >= 0) /* normal exit */
278 exit(ret);
280 die_errno("While expanding alias '%s': '%s'",
281 alias_command, alias_string + 1);
283 count = split_cmdline(alias_string, &new_argv);
284 if (count < 0)
285 die("Bad alias.%s string: %s", alias_command,
286 split_cmdline_strerror(count));
287 option_count = handle_options(&new_argv, &count, &envchanged);
288 if (envchanged)
289 die("alias '%s' changes environment variables\n"
290 "You can use '!git' in the alias to do this.",
291 alias_command);
292 memmove(new_argv - option_count, new_argv,
293 count * sizeof(char *));
294 new_argv -= option_count;
296 if (count < 1)
297 die("empty alias for %s", alias_command);
299 if (!strcmp(alias_command, new_argv[0]))
300 die("recursive alias: %s", alias_command);
302 trace_argv_printf(new_argv,
303 "trace: alias expansion: %s =>",
304 alias_command);
306 REALLOC_ARRAY(new_argv, count + *argcp);
307 /* insert after command name */
308 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
310 *argv = new_argv;
311 *argcp += count - 1;
313 ret = 1;
316 restore_env(0);
318 errno = saved_errno;
320 return ret;
323 #define RUN_SETUP (1<<0)
324 #define RUN_SETUP_GENTLY (1<<1)
325 #define USE_PAGER (1<<2)
327 * require working tree to be present -- anything uses this needs
328 * RUN_SETUP for reading from the configuration file.
330 #define NEED_WORK_TREE (1<<3)
331 #define SUPPORT_SUPER_PREFIX (1<<4)
333 struct cmd_struct {
334 const char *cmd;
335 int (*fn)(int, const char **, const char *);
336 int option;
339 static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
341 int status, help;
342 struct stat st;
343 const char *prefix;
345 prefix = NULL;
346 help = argc == 2 && !strcmp(argv[1], "-h");
347 if (!help) {
348 if (p->option & RUN_SETUP)
349 prefix = setup_git_directory();
350 else if (p->option & RUN_SETUP_GENTLY) {
351 int nongit_ok;
352 prefix = setup_git_directory_gently(&nongit_ok);
355 if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY))
356 use_pager = check_pager_config(p->cmd);
357 if (use_pager == -1 && p->option & USE_PAGER)
358 use_pager = 1;
360 if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
361 startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
362 trace_repo_setup(prefix);
364 commit_pager_choice();
366 if (!help && get_super_prefix()) {
367 if (!(p->option & SUPPORT_SUPER_PREFIX))
368 die("%s doesn't support --super-prefix", p->cmd);
371 if (!help && p->option & NEED_WORK_TREE)
372 setup_work_tree();
374 trace_argv_printf(argv, "trace: built-in: git");
376 status = p->fn(argc, argv, prefix);
377 if (status)
378 return status;
380 /* Somebody closed stdout? */
381 if (fstat(fileno(stdout), &st))
382 return 0;
383 /* Ignore write errors for pipes and sockets.. */
384 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
385 return 0;
387 /* Check for ENOSPC and EIO errors.. */
388 if (fflush(stdout))
389 die_errno("write failure on standard output");
390 if (ferror(stdout))
391 die("unknown write failure on standard output");
392 if (fclose(stdout))
393 die_errno("close failed on standard output");
394 return 0;
397 static struct cmd_struct commands[] = {
398 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
399 { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
400 { "annotate", cmd_annotate, RUN_SETUP },
401 { "apply", cmd_apply, RUN_SETUP_GENTLY },
402 { "archive", cmd_archive, RUN_SETUP_GENTLY },
403 { "bisect--helper", cmd_bisect__helper, RUN_SETUP },
404 { "blame", cmd_blame, RUN_SETUP },
405 { "branch", cmd_branch, RUN_SETUP },
406 { "bundle", cmd_bundle, RUN_SETUP_GENTLY },
407 { "cat-file", cmd_cat_file, RUN_SETUP },
408 { "check-attr", cmd_check_attr, RUN_SETUP },
409 { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
410 { "check-mailmap", cmd_check_mailmap, RUN_SETUP },
411 { "check-ref-format", cmd_check_ref_format },
412 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
413 { "checkout-index", cmd_checkout_index,
414 RUN_SETUP | NEED_WORK_TREE},
415 { "cherry", cmd_cherry, RUN_SETUP },
416 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
417 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
418 { "clone", cmd_clone },
419 { "column", cmd_column, RUN_SETUP_GENTLY },
420 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
421 { "commit-tree", cmd_commit_tree, RUN_SETUP },
422 { "config", cmd_config, RUN_SETUP_GENTLY },
423 { "count-objects", cmd_count_objects, RUN_SETUP },
424 { "credential", cmd_credential, RUN_SETUP_GENTLY },
425 { "describe", cmd_describe, RUN_SETUP },
426 { "diff", cmd_diff },
427 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
428 { "diff-index", cmd_diff_index, RUN_SETUP },
429 { "diff-tree", cmd_diff_tree, RUN_SETUP },
430 { "difftool", cmd_difftool, RUN_SETUP | NEED_WORK_TREE },
431 { "fast-export", cmd_fast_export, RUN_SETUP },
432 { "fetch", cmd_fetch, RUN_SETUP },
433 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
434 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
435 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
436 { "format-patch", cmd_format_patch, RUN_SETUP },
437 { "fsck", cmd_fsck, RUN_SETUP },
438 { "fsck-objects", cmd_fsck, RUN_SETUP },
439 { "gc", cmd_gc, RUN_SETUP },
440 { "get-tar-commit-id", cmd_get_tar_commit_id },
441 { "grep", cmd_grep, RUN_SETUP_GENTLY | SUPPORT_SUPER_PREFIX },
442 { "hash-object", cmd_hash_object },
443 { "help", cmd_help },
444 { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
445 { "init", cmd_init_db },
446 { "init-db", cmd_init_db },
447 { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
448 { "log", cmd_log, RUN_SETUP },
449 { "ls-files", cmd_ls_files, RUN_SETUP | SUPPORT_SUPER_PREFIX },
450 { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
451 { "ls-tree", cmd_ls_tree, RUN_SETUP },
452 { "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY },
453 { "mailsplit", cmd_mailsplit },
454 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
455 { "merge-base", cmd_merge_base, RUN_SETUP },
456 { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
457 { "merge-index", cmd_merge_index, RUN_SETUP },
458 { "merge-ours", cmd_merge_ours, RUN_SETUP },
459 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
460 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
461 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
462 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
463 { "merge-tree", cmd_merge_tree, RUN_SETUP },
464 { "mktag", cmd_mktag, RUN_SETUP },
465 { "mktree", cmd_mktree, RUN_SETUP },
466 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
467 { "name-rev", cmd_name_rev, RUN_SETUP },
468 { "notes", cmd_notes, RUN_SETUP },
469 { "pack-objects", cmd_pack_objects, RUN_SETUP },
470 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
471 { "pack-refs", cmd_pack_refs, RUN_SETUP },
472 { "patch-id", cmd_patch_id, RUN_SETUP_GENTLY },
473 { "pickaxe", cmd_blame, RUN_SETUP },
474 { "prune", cmd_prune, RUN_SETUP },
475 { "prune-packed", cmd_prune_packed, RUN_SETUP },
476 { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
477 { "push", cmd_push, RUN_SETUP },
478 { "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX},
479 { "rebase--helper", cmd_rebase__helper, RUN_SETUP | NEED_WORK_TREE },
480 { "receive-pack", cmd_receive_pack },
481 { "reflog", cmd_reflog, RUN_SETUP },
482 { "remote", cmd_remote, RUN_SETUP },
483 { "remote-ext", cmd_remote_ext },
484 { "remote-fd", cmd_remote_fd },
485 { "repack", cmd_repack, RUN_SETUP },
486 { "replace", cmd_replace, RUN_SETUP },
487 { "rerere", cmd_rerere, RUN_SETUP },
488 { "reset", cmd_reset, RUN_SETUP },
489 { "rev-list", cmd_rev_list, RUN_SETUP },
490 { "rev-parse", cmd_rev_parse },
491 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
492 { "rm", cmd_rm, RUN_SETUP },
493 { "send-pack", cmd_send_pack, RUN_SETUP },
494 { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
495 { "show", cmd_show, RUN_SETUP },
496 { "show-branch", cmd_show_branch, RUN_SETUP },
497 { "show-ref", cmd_show_ref, RUN_SETUP },
498 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
499 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
500 { "stripspace", cmd_stripspace },
501 { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX},
502 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
503 { "tag", cmd_tag, RUN_SETUP },
504 { "unpack-file", cmd_unpack_file, RUN_SETUP },
505 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
506 { "update-index", cmd_update_index, RUN_SETUP },
507 { "update-ref", cmd_update_ref, RUN_SETUP },
508 { "update-server-info", cmd_update_server_info, RUN_SETUP },
509 { "upload-archive", cmd_upload_archive },
510 { "upload-archive--writer", cmd_upload_archive_writer },
511 { "var", cmd_var, RUN_SETUP_GENTLY },
512 { "verify-commit", cmd_verify_commit, RUN_SETUP },
513 { "verify-pack", cmd_verify_pack },
514 { "verify-tag", cmd_verify_tag, RUN_SETUP },
515 { "version", cmd_version },
516 { "whatchanged", cmd_whatchanged, RUN_SETUP },
517 { "worktree", cmd_worktree, RUN_SETUP },
518 { "write-tree", cmd_write_tree, RUN_SETUP },
521 static struct cmd_struct *get_builtin(const char *s)
523 int i;
524 for (i = 0; i < ARRAY_SIZE(commands); i++) {
525 struct cmd_struct *p = commands + i;
526 if (!strcmp(s, p->cmd))
527 return p;
529 return NULL;
532 int is_builtin(const char *s)
534 return !!get_builtin(s);
537 static void list_builtins(void)
539 int i;
540 for (i = 0; i < ARRAY_SIZE(commands); i++)
541 printf("%s\n", commands[i].cmd);
544 #ifdef STRIP_EXTENSION
545 static void strip_extension(const char **argv)
547 size_t len;
549 if (strip_suffix(argv[0], STRIP_EXTENSION, &len))
550 argv[0] = xmemdupz(argv[0], len);
552 #else
553 #define strip_extension(cmd)
554 #endif
556 static void handle_builtin(int argc, const char **argv)
558 struct argv_array args = ARGV_ARRAY_INIT;
559 const char *cmd;
560 struct cmd_struct *builtin;
562 strip_extension(argv);
563 cmd = argv[0];
565 /* Turn "git cmd --help" into "git help --exclude-guides cmd" */
566 if (argc > 1 && !strcmp(argv[1], "--help")) {
567 int i;
569 argv[1] = argv[0];
570 argv[0] = cmd = "help";
572 for (i = 0; i < argc; i++) {
573 argv_array_push(&args, argv[i]);
574 if (!i)
575 argv_array_push(&args, "--exclude-guides");
578 argc++;
579 argv = args.argv;
582 builtin = get_builtin(cmd);
583 if (builtin)
584 exit(run_builtin(builtin, argc, argv));
585 argv_array_clear(&args);
588 static void execv_dashed_external(const char **argv)
590 struct child_process cmd = CHILD_PROCESS_INIT;
591 int status;
593 if (get_super_prefix())
594 die("%s doesn't support --super-prefix", argv[0]);
596 if (use_pager == -1)
597 use_pager = check_pager_config(argv[0]);
598 commit_pager_choice();
600 argv_array_pushf(&cmd.args, "git-%s", argv[0]);
601 argv_array_pushv(&cmd.args, argv + 1);
602 cmd.clean_on_exit = 1;
603 cmd.wait_after_clean = 1;
604 cmd.silent_exec_failure = 1;
606 trace_argv_printf(cmd.args.argv, "trace: exec:");
609 * If we fail because the command is not found, it is
610 * OK to return. Otherwise, we just pass along the status code,
611 * or our usual generic code if we were not even able to exec
612 * the program.
614 status = run_command(&cmd);
615 if (status >= 0)
616 exit(status);
617 else if (errno != ENOENT)
618 exit(128);
621 static int run_argv(int *argcp, const char ***argv)
623 int done_alias = 0;
625 while (1) {
627 * If we tried alias and futzed with our environment,
628 * it no longer is safe to invoke builtins directly in
629 * general. We have to spawn them as dashed externals.
631 * NEEDSWORK: if we can figure out cases
632 * where it is safe to do, we can avoid spawning a new
633 * process.
635 if (!done_alias)
636 handle_builtin(*argcp, *argv);
638 /* .. then try the external ones */
639 execv_dashed_external(*argv);
641 /* It could be an alias -- this works around the insanity
642 * of overriding "git log" with "git show" by having
643 * alias.log = show
645 if (done_alias)
646 break;
647 if (!handle_alias(argcp, argv))
648 break;
649 done_alias = 1;
652 return done_alias;
655 int cmd_main(int argc, const char **argv)
657 const char *cmd;
658 int done_help = 0;
660 cmd = argv[0];
661 if (!cmd)
662 cmd = "git-help";
663 else {
664 const char *slash = find_last_dir_sep(cmd);
665 if (slash)
666 cmd = slash + 1;
669 trace_command_performance(argv);
672 * "git-xxxx" is the same as "git xxxx", but we obviously:
674 * - cannot take flags in between the "git" and the "xxxx".
675 * - cannot execute it externally (since it would just do
676 * the same thing over again)
678 * So we just directly call the builtin handler, and die if
679 * that one cannot handle it.
681 if (skip_prefix(cmd, "git-", &cmd)) {
682 argv[0] = cmd;
683 handle_builtin(argc, argv);
684 die("cannot handle %s as a builtin", cmd);
687 /* Look for flags.. */
688 argv++;
689 argc--;
690 handle_options(&argv, &argc, NULL);
691 if (argc > 0) {
692 /* translate --help and --version into commands */
693 skip_prefix(argv[0], "--", &argv[0]);
694 } else {
695 /* The user didn't specify a command; give them help */
696 commit_pager_choice();
697 printf("usage: %s\n\n", git_usage_string);
698 list_common_cmds_help();
699 printf("\n%s\n", _(git_more_info_string));
700 exit(1);
702 cmd = argv[0];
705 * We use PATH to find git commands, but we prepend some higher
706 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
707 * environment, and the $(gitexecdir) from the Makefile at build
708 * time.
710 setup_path();
712 while (1) {
713 int was_alias = run_argv(&argc, &argv);
714 if (errno != ENOENT)
715 break;
716 if (was_alias) {
717 fprintf(stderr, "Expansion of alias '%s' failed; "
718 "'%s' is not a git command\n",
719 cmd, argv[0]);
720 exit(1);
722 if (!done_help) {
723 cmd = argv[0] = help_unknown_cmd(cmd);
724 done_help = 1;
725 } else
726 break;
729 fprintf(stderr, "Failed to run command '%s': %s\n",
730 cmd, strerror(errno));
732 return 1;