freshlybakedca.ke
Git fork
1#define USE_THE_REPOSITORY_VARIABLE
2
3#include "builtin.h"
4#include "config.h"
5#include "environment.h"
6#include "exec-cmd.h"
7#include "gettext.h"
8#include "help.h"
9#include "object-file.h"
10#include "pager.h"
11#include "read-cache-ll.h"
12#include "run-command.h"
13#include "alias.h"
14#include "replace-object.h"
15#include "setup.h"
16#include "attr.h"
17#include "shallow.h"
18#include "trace.h"
19#include "trace2.h"
20
21#define RUN_SETUP (1<<0)
22#define RUN_SETUP_GENTLY (1<<1)
23#define USE_PAGER (1<<2)
24/*
25 * require working tree to be present -- anything uses this needs
26 * RUN_SETUP for reading from the configuration file.
27 */
28#define NEED_WORK_TREE (1<<3)
29#define DELAY_PAGER_CONFIG (1<<4)
30#define NO_PARSEOPT (1<<5) /* parse-options is not used */
31#define DEPRECATED (1<<6)
32
33struct cmd_struct {
34 const char *cmd;
35 int (*fn)(int, const char **, const char *, struct repository *);
36 unsigned int option;
37};
38
39const char git_usage_string[] =
40 N_("git [-v | --version] [-h | --help] [-C <path>] [-c <name>=<value>]\n"
41 " [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
42 " [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--no-lazy-fetch]\n"
43 " [--no-optional-locks] [--no-advice] [--bare] [--git-dir=<path>]\n"
44 " [--work-tree=<path>] [--namespace=<name>] [--config-env=<name>=<envvar>]\n"
45 " <command> [<args>]");
46
47const char git_more_info_string[] =
48 N_("'git help -a' and 'git help -g' list available subcommands and some\n"
49 "concept guides. See 'git help <command>' or 'git help <concept>'\n"
50 "to read about a specific subcommand or concept.\n"
51 "See 'git help git' for an overview of the system.");
52
53static int use_pager = -1;
54
55static void list_builtins(struct string_list *list,
56 unsigned int include_option,
57 unsigned int exclude_option);
58
59static void exclude_helpers_from_list(struct string_list *list)
60{
61 size_t i = 0;
62
63 while (i < list->nr) {
64 if (strstr(list->items[i].string, "--"))
65 unsorted_string_list_delete_item(list, i, 0);
66 else
67 i++;
68 }
69}
70
71static int match_token(const char *spec, int len, const char *token)
72{
73 int token_len = strlen(token);
74
75 return len == token_len && !strncmp(spec, token, token_len);
76}
77
78static int list_cmds(const char *spec)
79{
80 struct string_list list = STRING_LIST_INIT_DUP;
81 int nongit;
82
83 /*
84 * Set up the repository so we can pick up any repo-level config (like
85 * completion.commands).
86 */
87 setup_git_directory_gently(&nongit);
88
89 while (*spec) {
90 const char *sep = strchrnul(spec, ',');
91 int len = sep - spec;
92
93 if (match_token(spec, len, "builtins"))
94 list_builtins(&list, 0, 0);
95 else if (match_token(spec, len, "main"))
96 list_all_main_cmds(&list);
97 else if (match_token(spec, len, "others"))
98 list_all_other_cmds(&list);
99 else if (match_token(spec, len, "nohelpers"))
100 exclude_helpers_from_list(&list);
101 else if (match_token(spec, len, "alias"))
102 list_aliases(&list);
103 else if (match_token(spec, len, "config"))
104 list_cmds_by_config(&list);
105 else if (match_token(spec, len, "deprecated"))
106 list_builtins(&list, DEPRECATED, 0);
107 else if (len > 5 && !strncmp(spec, "list-", 5)) {
108 struct strbuf sb = STRBUF_INIT;
109
110 strbuf_add(&sb, spec + 5, len - 5);
111 list_cmds_by_category(&list, sb.buf);
112 strbuf_release(&sb);
113 }
114 else
115 die(_("unsupported command listing type '%s'"), spec);
116 spec += len;
117 if (*spec == ',')
118 spec++;
119 }
120 for (size_t i = 0; i < list.nr; i++)
121 puts(list.items[i].string);
122 string_list_clear(&list, 0);
123 return 0;
124}
125
126static void commit_pager_choice(void)
127{
128 switch (use_pager) {
129 case 0:
130 setenv("GIT_PAGER", "cat", 1);
131 break;
132 case 1:
133 setup_pager(the_repository);
134 break;
135 default:
136 break;
137 }
138}
139
140void setup_auto_pager(const char *cmd, int def)
141{
142 if (use_pager != -1 || pager_in_use())
143 return;
144 use_pager = check_pager_config(the_repository, cmd);
145 if (use_pager == -1)
146 use_pager = def;
147 commit_pager_choice();
148}
149
150static void print_system_path(const char *path)
151{
152 char *s_path = system_path(path);
153 puts(s_path);
154 free(s_path);
155}
156
157static int handle_options(const char ***argv, int *argc, int *envchanged)
158{
159 const char **orig_argv = *argv;
160
161 while (*argc > 0) {
162 const char *cmd = (*argv)[0];
163 if (cmd[0] != '-')
164 break;
165
166 /*
167 * For legacy reasons, the "version" and "help"
168 * commands can be written with "--" prepended
169 * to make them look like flags.
170 */
171 if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h") ||
172 !strcmp(cmd, "--version") || !strcmp(cmd, "-v"))
173 break;
174
175 /*
176 * Check remaining flags.
177 */
178 if (skip_prefix(cmd, "--exec-path", &cmd)) {
179 if (*cmd == '=')
180 git_set_exec_path(cmd + 1);
181 else {
182 puts(git_exec_path());
183 trace2_cmd_name("_query_");
184 exit(0);
185 }
186 } else if (!strcmp(cmd, "--html-path")) {
187 print_system_path(GIT_HTML_PATH);
188 trace2_cmd_name("_query_");
189 exit(0);
190 } else if (!strcmp(cmd, "--man-path")) {
191 print_system_path(GIT_MAN_PATH);
192 trace2_cmd_name("_query_");
193 exit(0);
194 } else if (!strcmp(cmd, "--info-path")) {
195 print_system_path(GIT_INFO_PATH);
196 trace2_cmd_name("_query_");
197 exit(0);
198 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
199 use_pager = 1;
200 } else if (!strcmp(cmd, "-P") || !strcmp(cmd, "--no-pager")) {
201 use_pager = 0;
202 if (envchanged)
203 *envchanged = 1;
204 } else if (!strcmp(cmd, "--no-lazy-fetch")) {
205 fetch_if_missing = 0;
206 setenv(NO_LAZY_FETCH_ENVIRONMENT, "1", 1);
207 if (envchanged)
208 *envchanged = 1;
209 } else if (!strcmp(cmd, "--no-replace-objects")) {
210 disable_replace_refs();
211 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
212 if (envchanged)
213 *envchanged = 1;
214 } else if (!strcmp(cmd, "--git-dir")) {
215 if (*argc < 2) {
216 fprintf(stderr, _("no directory given for '%s' option\n" ), "--git-dir");
217 usage(git_usage_string);
218 }
219 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
220 if (envchanged)
221 *envchanged = 1;
222 (*argv)++;
223 (*argc)--;
224 } else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
225 setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
226 if (envchanged)
227 *envchanged = 1;
228 } else if (!strcmp(cmd, "--namespace")) {
229 if (*argc < 2) {
230 fprintf(stderr, _("no namespace given for --namespace\n" ));
231 usage(git_usage_string);
232 }
233 setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
234 if (envchanged)
235 *envchanged = 1;
236 (*argv)++;
237 (*argc)--;
238 } else if (skip_prefix(cmd, "--namespace=", &cmd)) {
239 setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
240 if (envchanged)
241 *envchanged = 1;
242 } else if (!strcmp(cmd, "--work-tree")) {
243 if (*argc < 2) {
244 fprintf(stderr, _("no directory given for '%s' option\n" ), "--work-tree");
245 usage(git_usage_string);
246 }
247 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
248 if (envchanged)
249 *envchanged = 1;
250 (*argv)++;
251 (*argc)--;
252 } else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
253 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
254 if (envchanged)
255 *envchanged = 1;
256 } else if (!strcmp(cmd, "--bare")) {
257 char *cwd = xgetcwd();
258 is_bare_repository_cfg = 1;
259 setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
260 free(cwd);
261 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
262 if (envchanged)
263 *envchanged = 1;
264 } else if (!strcmp(cmd, "-c")) {
265 if (*argc < 2) {
266 fprintf(stderr, _("-c expects a configuration string\n" ));
267 usage(git_usage_string);
268 }
269 git_config_push_parameter((*argv)[1]);
270 (*argv)++;
271 (*argc)--;
272 } else if (!strcmp(cmd, "--config-env")) {
273 if (*argc < 2) {
274 fprintf(stderr, _("no config key given for --config-env\n" ));
275 usage(git_usage_string);
276 }
277 git_config_push_env((*argv)[1]);
278 (*argv)++;
279 (*argc)--;
280 } else if (skip_prefix(cmd, "--config-env=", &cmd)) {
281 git_config_push_env(cmd);
282 } else if (!strcmp(cmd, "--literal-pathspecs")) {
283 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
284 if (envchanged)
285 *envchanged = 1;
286 } else if (!strcmp(cmd, "--no-literal-pathspecs")) {
287 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
288 if (envchanged)
289 *envchanged = 1;
290 } else if (!strcmp(cmd, "--glob-pathspecs")) {
291 setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
292 if (envchanged)
293 *envchanged = 1;
294 } else if (!strcmp(cmd, "--noglob-pathspecs")) {
295 setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
296 if (envchanged)
297 *envchanged = 1;
298 } else if (!strcmp(cmd, "--icase-pathspecs")) {
299 setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
300 if (envchanged)
301 *envchanged = 1;
302 } else if (!strcmp(cmd, "--no-optional-locks")) {
303 setenv(GIT_OPTIONAL_LOCKS_ENVIRONMENT, "0", 1);
304 if (envchanged)
305 *envchanged = 1;
306 } else if (!strcmp(cmd, "--shallow-file")) {
307 (*argv)++;
308 (*argc)--;
309 set_alternate_shallow_file(the_repository, (*argv)[0], 1);
310 if (envchanged)
311 *envchanged = 1;
312 } else if (!strcmp(cmd, "-C")) {
313 if (*argc < 2) {
314 fprintf(stderr, _("no directory given for '%s' option\n" ), "-C");
315 usage(git_usage_string);
316 }
317 if ((*argv)[1][0]) {
318 if (chdir((*argv)[1]))
319 die_errno("cannot change to '%s'", (*argv)[1]);
320 if (envchanged)
321 *envchanged = 1;
322 }
323 (*argv)++;
324 (*argc)--;
325 } else if (skip_prefix(cmd, "--list-cmds=", &cmd)) {
326 trace2_cmd_name("_query_");
327 if (!strcmp(cmd, "parseopt")) {
328 struct string_list list = STRING_LIST_INIT_DUP;
329
330 list_builtins(&list, 0, NO_PARSEOPT);
331 for (size_t i = 0; i < list.nr; i++)
332 printf("%s ", list.items[i].string);
333 string_list_clear(&list, 0);
334 exit(0);
335 } else {
336 exit(list_cmds(cmd));
337 }
338 } else if (!strcmp(cmd, "--attr-source")) {
339 if (*argc < 2) {
340 fprintf(stderr, _("no attribute source given for --attr-source\n" ));
341 usage(git_usage_string);
342 }
343 setenv(GIT_ATTR_SOURCE_ENVIRONMENT, (*argv)[1], 1);
344 if (envchanged)
345 *envchanged = 1;
346 (*argv)++;
347 (*argc)--;
348 } else if (skip_prefix(cmd, "--attr-source=", &cmd)) {
349 set_git_attr_source(cmd);
350 setenv(GIT_ATTR_SOURCE_ENVIRONMENT, cmd, 1);
351 if (envchanged)
352 *envchanged = 1;
353 } else if (!strcmp(cmd, "--no-advice")) {
354 setenv(GIT_ADVICE_ENVIRONMENT, "0", 1);
355 if (envchanged)
356 *envchanged = 1;
357 } else {
358 fprintf(stderr, _("unknown option: %s\n"), cmd);
359 usage(git_usage_string);
360 }
361
362 (*argv)++;
363 (*argc)--;
364 }
365 return (*argv) - orig_argv;
366}
367
368static int handle_alias(struct strvec *args, struct string_list *expanded_aliases)
369{
370 int envchanged = 0, ret = 0, saved_errno = errno;
371 int count, option_count;
372 const char **new_argv;
373 const char *alias_command;
374 char *alias_string;
375
376 alias_command = args->v[0];
377 alias_string = alias_lookup(alias_command);
378 if (alias_string) {
379 struct string_list_item *seen;
380
381 if (args->nr == 2 && !strcmp(args->v[1], "-h"))
382 fprintf_ln(stderr, _("'%s' is aliased to '%s'"),
383 alias_command, alias_string);
384 if (alias_string[0] == '!') {
385 struct child_process child = CHILD_PROCESS_INIT;
386 int nongit_ok;
387
388 /* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
389 setup_git_directory_gently(&nongit_ok);
390
391 commit_pager_choice();
392
393 child.use_shell = 1;
394 child.clean_on_exit = 1;
395 child.wait_after_clean = 1;
396 child.trace2_child_class = "shell_alias";
397 strvec_push(&child.args, alias_string + 1);
398 strvec_pushv(&child.args, args->v + 1);
399
400 trace2_cmd_alias(alias_command, child.args.v);
401 trace2_cmd_name("_run_shell_alias_");
402
403 ret = run_command(&child);
404 if (ret >= 0) /* normal exit */
405 exit(ret);
406
407 die_errno(_("while expanding alias '%s': '%s'"),
408 alias_command, alias_string + 1);
409 }
410 count = split_cmdline(alias_string, &new_argv);
411 if (count < 0)
412 die(_("bad alias.%s string: %s"), alias_command,
413 _(split_cmdline_strerror(count)));
414 option_count = handle_options(&new_argv, &count, &envchanged);
415 if (envchanged)
416 die(_("alias '%s' changes environment variables.\n"
417 "You can use '!git' in the alias to do this"),
418 alias_command);
419 MOVE_ARRAY(new_argv - option_count, new_argv, count);
420 new_argv -= option_count;
421
422 if (count < 1)
423 die(_("empty alias for %s"), alias_command);
424
425 if (!strcmp(alias_command, new_argv[0]))
426 die(_("recursive alias: %s"), alias_command);
427
428 string_list_append(expanded_aliases, alias_command);
429 seen = unsorted_string_list_lookup(expanded_aliases,
430 new_argv[0]);
431
432 if (seen) {
433 struct strbuf sb = STRBUF_INIT;
434 for (size_t i = 0; i < expanded_aliases->nr; i++) {
435 struct string_list_item *item = &expanded_aliases->items[i];
436
437 strbuf_addf(&sb, "\n %s", item->string);
438 if (item == seen)
439 strbuf_addstr(&sb, " <==");
440 else if (i == expanded_aliases->nr - 1)
441 strbuf_addstr(&sb, " ==>");
442 }
443 die(_("alias loop detected: expansion of '%s' does"
444 " not terminate:%s"), expanded_aliases->items[0].string, sb.buf);
445 }
446
447 trace_argv_printf(new_argv,
448 "trace: alias expansion: %s =>",
449 alias_command);
450 trace2_cmd_alias(alias_command, new_argv);
451
452 /* Replace the alias with the new arguments. */
453 strvec_splice(args, 0, 1, new_argv, count);
454
455 free(alias_string);
456 free(new_argv);
457
458 ret = 1;
459 }
460
461 errno = saved_errno;
462
463 return ret;
464}
465
466static int run_builtin(struct cmd_struct *p, int argc, const char **argv, struct repository *repo)
467{
468 int status, help;
469 int no_repo = 1;
470 struct stat st;
471 const char *prefix;
472 int run_setup = (p->option & (RUN_SETUP | RUN_SETUP_GENTLY));
473
474 help = argc == 2 && (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help-all"));
475 if (help && (run_setup & RUN_SETUP))
476 /* demote to GENTLY to allow 'git cmd -h' outside repo */
477 run_setup = RUN_SETUP_GENTLY;
478
479 if (run_setup & RUN_SETUP) {
480 prefix = setup_git_directory();
481 no_repo = 0;
482 } else if (run_setup & RUN_SETUP_GENTLY) {
483 prefix = setup_git_directory_gently(&no_repo);
484 } else {
485 prefix = NULL;
486 }
487 assert(!prefix || *prefix);
488 precompose_argv_prefix(argc, argv, NULL);
489 if (use_pager == -1 && run_setup &&
490 !(p->option & DELAY_PAGER_CONFIG))
491 use_pager = check_pager_config(repo, p->cmd);
492 if (use_pager == -1 && p->option & USE_PAGER)
493 use_pager = 1;
494 if (run_setup && startup_info->have_repository)
495 /* get_git_dir() may set up repo, avoid that */
496 trace_repo_setup(repo);
497 commit_pager_choice();
498
499 if (!help && p->option & NEED_WORK_TREE)
500 setup_work_tree();
501
502 trace_argv_printf(argv, "trace: built-in: git");
503 trace2_cmd_name(p->cmd);
504
505 validate_cache_entries(repo->index);
506 status = p->fn(argc, argv, prefix, no_repo ? NULL : repo);
507 validate_cache_entries(repo->index);
508
509 if (status)
510 return status;
511
512 /* Somebody closed stdout? */
513 if (fstat(fileno(stdout), &st))
514 return 0;
515 /* Ignore write errors for pipes and sockets.. */
516 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
517 return 0;
518
519 /* Check for ENOSPC and EIO errors.. */
520 if (fflush(stdout))
521 die_errno(_("write failure on standard output"));
522 if (ferror(stdout))
523 die(_("unknown write failure on standard output"));
524 if (fclose(stdout))
525 die_errno(_("close failed on standard output"));
526 return 0;
527}
528
529static struct cmd_struct commands[] = {
530 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
531 { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
532 { "annotate", cmd_annotate, RUN_SETUP },
533 { "apply", cmd_apply, RUN_SETUP_GENTLY },
534 { "archive", cmd_archive, RUN_SETUP_GENTLY },
535 { "backfill", cmd_backfill, RUN_SETUP },
536 { "bisect", cmd_bisect, RUN_SETUP },
537 { "blame", cmd_blame, RUN_SETUP },
538 { "branch", cmd_branch, RUN_SETUP | DELAY_PAGER_CONFIG },
539 { "bugreport", cmd_bugreport, RUN_SETUP_GENTLY },
540 { "bundle", cmd_bundle, RUN_SETUP_GENTLY },
541 { "cat-file", cmd_cat_file, RUN_SETUP },
542 { "check-attr", cmd_check_attr, RUN_SETUP },
543 { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
544 { "check-mailmap", cmd_check_mailmap, RUN_SETUP },
545 { "check-ref-format", cmd_check_ref_format, NO_PARSEOPT },
546 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
547 { "checkout--worker", cmd_checkout__worker,
548 RUN_SETUP | NEED_WORK_TREE },
549 { "checkout-index", cmd_checkout_index,
550 RUN_SETUP | NEED_WORK_TREE},
551 { "cherry", cmd_cherry, RUN_SETUP },
552 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
553 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
554 { "clone", cmd_clone },
555 { "column", cmd_column, RUN_SETUP_GENTLY },
556 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
557 { "commit-graph", cmd_commit_graph, RUN_SETUP },
558 { "commit-tree", cmd_commit_tree, RUN_SETUP },
559 { "config", cmd_config, RUN_SETUP_GENTLY | DELAY_PAGER_CONFIG },
560 { "count-objects", cmd_count_objects, RUN_SETUP },
561 { "credential", cmd_credential, RUN_SETUP_GENTLY | NO_PARSEOPT },
562 { "credential-cache", cmd_credential_cache },
563 { "credential-cache--daemon", cmd_credential_cache_daemon },
564 { "credential-store", cmd_credential_store },
565 { "describe", cmd_describe, RUN_SETUP },
566 { "diagnose", cmd_diagnose, RUN_SETUP_GENTLY },
567 { "diff", cmd_diff, NO_PARSEOPT },
568 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
569 { "diff-index", cmd_diff_index, RUN_SETUP | NO_PARSEOPT },
570 { "diff-pairs", cmd_diff_pairs, RUN_SETUP | NO_PARSEOPT },
571 { "diff-tree", cmd_diff_tree, RUN_SETUP | NO_PARSEOPT },
572 { "difftool", cmd_difftool, RUN_SETUP_GENTLY },
573 { "fast-export", cmd_fast_export, RUN_SETUP },
574 { "fast-import", cmd_fast_import, RUN_SETUP | NO_PARSEOPT },
575 { "fetch", cmd_fetch, RUN_SETUP },
576 { "fetch-pack", cmd_fetch_pack, RUN_SETUP | NO_PARSEOPT },
577 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
578 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
579 { "for-each-repo", cmd_for_each_repo, RUN_SETUP_GENTLY },
580 { "format-patch", cmd_format_patch, RUN_SETUP },
581 { "fsck", cmd_fsck, RUN_SETUP },
582 { "fsck-objects", cmd_fsck, RUN_SETUP },
583 { "fsmonitor--daemon", cmd_fsmonitor__daemon, RUN_SETUP },
584 { "gc", cmd_gc, RUN_SETUP },
585 { "get-tar-commit-id", cmd_get_tar_commit_id, NO_PARSEOPT },
586 { "grep", cmd_grep, RUN_SETUP_GENTLY },
587 { "hash-object", cmd_hash_object },
588 { "help", cmd_help },
589 { "hook", cmd_hook, RUN_SETUP },
590 { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY | NO_PARSEOPT },
591 { "init", cmd_init_db },
592 { "init-db", cmd_init_db },
593 { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
594 { "last-modified", cmd_last_modified, RUN_SETUP },
595 { "log", cmd_log, RUN_SETUP },
596 { "ls-files", cmd_ls_files, RUN_SETUP },
597 { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
598 { "ls-tree", cmd_ls_tree, RUN_SETUP },
599 { "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY },
600 { "mailsplit", cmd_mailsplit, NO_PARSEOPT },
601 { "maintenance", cmd_maintenance, RUN_SETUP },
602 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
603 { "merge-base", cmd_merge_base, RUN_SETUP },
604 { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
605 { "merge-index", cmd_merge_index, RUN_SETUP | NO_PARSEOPT },
606 { "merge-ours", cmd_merge_ours, RUN_SETUP | NO_PARSEOPT },
607 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
608 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
609 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
610 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
611 { "merge-tree", cmd_merge_tree, RUN_SETUP },
612 { "mktag", cmd_mktag, RUN_SETUP },
613 { "mktree", cmd_mktree, RUN_SETUP },
614 { "multi-pack-index", cmd_multi_pack_index, RUN_SETUP },
615 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
616 { "name-rev", cmd_name_rev, RUN_SETUP },
617 { "notes", cmd_notes, RUN_SETUP },
618 { "pack-objects", cmd_pack_objects, RUN_SETUP },
619#ifndef WITH_BREAKING_CHANGES
620 { "pack-redundant", cmd_pack_redundant, RUN_SETUP | NO_PARSEOPT | DEPRECATED },
621#endif
622 { "pack-refs", cmd_pack_refs, RUN_SETUP },
623 { "patch-id", cmd_patch_id, RUN_SETUP_GENTLY | NO_PARSEOPT },
624 { "pickaxe", cmd_blame, RUN_SETUP },
625 { "prune", cmd_prune, RUN_SETUP },
626 { "prune-packed", cmd_prune_packed, RUN_SETUP },
627 { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
628 { "push", cmd_push, RUN_SETUP },
629 { "range-diff", cmd_range_diff, RUN_SETUP | USE_PAGER },
630 { "read-tree", cmd_read_tree, RUN_SETUP },
631 { "rebase", cmd_rebase, RUN_SETUP | NEED_WORK_TREE },
632 { "receive-pack", cmd_receive_pack },
633 { "reflog", cmd_reflog, RUN_SETUP },
634 { "refs", cmd_refs, RUN_SETUP },
635 { "remote", cmd_remote, RUN_SETUP },
636 { "remote-ext", cmd_remote_ext, NO_PARSEOPT },
637 { "remote-fd", cmd_remote_fd, NO_PARSEOPT },
638 { "repack", cmd_repack, RUN_SETUP },
639 { "replace", cmd_replace, RUN_SETUP },
640 { "replay", cmd_replay, RUN_SETUP },
641 { "repo", cmd_repo, RUN_SETUP },
642 { "rerere", cmd_rerere, RUN_SETUP },
643 { "reset", cmd_reset, RUN_SETUP },
644 { "restore", cmd_restore, RUN_SETUP | NEED_WORK_TREE },
645 { "rev-list", cmd_rev_list, RUN_SETUP | NO_PARSEOPT },
646 { "rev-parse", cmd_rev_parse, NO_PARSEOPT },
647 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
648 { "rm", cmd_rm, RUN_SETUP },
649 { "send-pack", cmd_send_pack, RUN_SETUP },
650 { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
651 { "show", cmd_show, RUN_SETUP },
652 { "show-branch", cmd_show_branch, RUN_SETUP },
653 { "show-index", cmd_show_index, RUN_SETUP_GENTLY },
654 { "show-ref", cmd_show_ref, RUN_SETUP },
655 { "sparse-checkout", cmd_sparse_checkout, RUN_SETUP },
656 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
657 { "stash", cmd_stash, RUN_SETUP | NEED_WORK_TREE },
658 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
659 { "stripspace", cmd_stripspace },
660 { "submodule--helper", cmd_submodule__helper, RUN_SETUP },
661 { "switch", cmd_switch, RUN_SETUP | NEED_WORK_TREE },
662 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
663 { "tag", cmd_tag, RUN_SETUP | DELAY_PAGER_CONFIG },
664 { "unpack-file", cmd_unpack_file, RUN_SETUP | NO_PARSEOPT },
665 { "unpack-objects", cmd_unpack_objects, RUN_SETUP | NO_PARSEOPT },
666 { "update-index", cmd_update_index, RUN_SETUP },
667 { "update-ref", cmd_update_ref, RUN_SETUP },
668 { "update-server-info", cmd_update_server_info, RUN_SETUP },
669 { "upload-archive", cmd_upload_archive, NO_PARSEOPT },
670 { "upload-archive--writer", cmd_upload_archive_writer, NO_PARSEOPT },
671 { "upload-pack", cmd_upload_pack },
672 { "var", cmd_var, RUN_SETUP_GENTLY | NO_PARSEOPT },
673 { "verify-commit", cmd_verify_commit, RUN_SETUP },
674 { "verify-pack", cmd_verify_pack },
675 { "verify-tag", cmd_verify_tag, RUN_SETUP },
676 { "version", cmd_version },
677#ifndef WITH_BREAKING_CHANGES
678 { "whatchanged", cmd_whatchanged, RUN_SETUP | DEPRECATED },
679#endif
680 { "worktree", cmd_worktree, RUN_SETUP },
681 { "write-tree", cmd_write_tree, RUN_SETUP },
682};
683
684static struct cmd_struct *get_builtin(const char *s)
685{
686 for (size_t i = 0; i < ARRAY_SIZE(commands); i++) {
687 struct cmd_struct *p = commands + i;
688 if (!strcmp(s, p->cmd))
689 return p;
690 }
691 return NULL;
692}
693
694int is_builtin(const char *s)
695{
696 return !!get_builtin(s);
697}
698
699static void list_builtins(struct string_list *out,
700 unsigned int include_option,
701 unsigned int exclude_option)
702{
703 if (include_option && exclude_option)
704 BUG("'include_option' and 'exclude_option' are mutually exclusive");
705 for (size_t i = 0; i < ARRAY_SIZE(commands); i++) {
706 if (include_option && !(commands[i].option & include_option))
707 continue;
708 if (exclude_option && (commands[i].option & exclude_option))
709 continue;
710 string_list_append(out, commands[i].cmd);
711 }
712}
713
714void load_builtin_commands(const char *prefix, struct cmdnames *cmds)
715{
716 const char *name;
717
718 /*
719 * Callers can ask for a subset of the commands based on a certain
720 * prefix, which is then dropped from the added names. The names in
721 * the `commands[]` array do not have the `git-` prefix, though,
722 * therefore we must expect the `prefix` to at least start with `git-`.
723 */
724 if (!skip_prefix(prefix, "git-", &prefix))
725 BUG("prefix '%s' must start with 'git-'", prefix);
726
727 for (size_t i = 0; i < ARRAY_SIZE(commands); i++)
728 if (skip_prefix(commands[i].cmd, prefix, &name))
729 add_cmdname(cmds, name, strlen(name));
730}
731
732#ifdef STRIP_EXTENSION
733static void strip_extension(struct strvec *args)
734{
735 size_t len;
736
737 if (strip_suffix(args->v[0], STRIP_EXTENSION, &len)) {
738 char *stripped = xmemdupz(args->v[0], len);
739 strvec_replace(args, 0, stripped);
740 free(stripped);
741 }
742}
743#else
744#define strip_extension(cmd)
745#endif
746
747static void handle_builtin(struct strvec *args)
748{
749 const char *cmd;
750 struct cmd_struct *builtin;
751
752 strip_extension(args);
753 cmd = args->v[0];
754
755 /* Turn "git cmd --help" into "git help --exclude-guides cmd" */
756 if (args->nr > 1 && !strcmp(args->v[1], "--help")) {
757 const char *exclude_guides_arg[] = { "--exclude-guides" };
758
759 strvec_replace(args, 1, args->v[0]);
760 strvec_replace(args, 0, "help");
761 cmd = "help";
762 strvec_splice(args, 2, 0, exclude_guides_arg,
763 ARRAY_SIZE(exclude_guides_arg));
764 }
765
766 builtin = get_builtin(cmd);
767 if (builtin) {
768 const char **argv_copy = NULL;
769 int ret;
770
771 /*
772 * `run_builtin()` will modify the argv array, so we need to
773 * create a shallow copy such that we can free all of its
774 * strings.
775 */
776 if (args->nr)
777 DUP_ARRAY(argv_copy, args->v, args->nr + 1);
778
779 ret = run_builtin(builtin, args->nr, argv_copy, the_repository);
780 strvec_clear(args);
781 free(argv_copy);
782 exit(ret);
783 }
784}
785
786static void execv_dashed_external(const char **argv)
787{
788 struct child_process cmd = CHILD_PROCESS_INIT;
789 int status;
790
791 if (use_pager == -1 && !is_builtin(argv[0]))
792 use_pager = check_pager_config(the_repository, argv[0]);
793 commit_pager_choice();
794
795 strvec_pushf(&cmd.args, "git-%s", argv[0]);
796 strvec_pushv(&cmd.args, argv + 1);
797 cmd.clean_on_exit = 1;
798 cmd.wait_after_clean = 1;
799 cmd.silent_exec_failure = 1;
800 cmd.trace2_child_class = "dashed";
801
802 trace2_cmd_name("_run_dashed_");
803
804 /*
805 * The code in run_command() logs trace2 child_start/child_exit
806 * events, so we do not need to report exec/exec_result events here.
807 */
808 trace_argv_printf(cmd.args.v, "trace: exec:");
809
810 /*
811 * If we fail because the command is not found, it is
812 * OK to return. Otherwise, we just pass along the status code,
813 * or our usual generic code if we were not even able to exec
814 * the program.
815 */
816 status = run_command(&cmd);
817
818 /*
819 * If the child process ran and we are now going to exit, emit a
820 * generic string as our trace2 command verb to indicate that we
821 * launched a dashed command.
822 */
823 if (status >= 0)
824 exit(status);
825 else if (errno != ENOENT)
826 exit(128);
827}
828
829static int is_deprecated_command(const char *cmd)
830{
831 struct cmd_struct *builtin = get_builtin(cmd);
832 return builtin && (builtin->option & DEPRECATED);
833}
834
835static int run_argv(struct strvec *args)
836{
837 int done_alias = 0;
838 struct string_list expanded_aliases = STRING_LIST_INIT_DUP;
839
840 while (1) {
841 /*
842 * Allow deprecated commands to be overridden by aliases. This
843 * creates a seamless path forward for people who want to keep
844 * using the name after it is gone, but want to skip the
845 * deprecation complaint in the meantime.
846 */
847 if (is_deprecated_command(args->v[0]) &&
848 handle_alias(args, &expanded_aliases)) {
849 done_alias = 1;
850 continue;
851 }
852 /*
853 * If we tried alias and futzed with our environment,
854 * it no longer is safe to invoke builtins directly in
855 * general. We have to spawn them as dashed externals.
856 *
857 * NEEDSWORK: if we can figure out cases
858 * where it is safe to do, we can avoid spawning a new
859 * process.
860 */
861 if (!done_alias)
862 handle_builtin(args);
863 else if (get_builtin(args->v[0])) {
864 struct child_process cmd = CHILD_PROCESS_INIT;
865 int err;
866
867 /*
868 * The current process is committed to launching a
869 * child process to run the command named in (**argv)
870 * and exiting. Log a generic string as the trace2
871 * command verb to indicate this. Note that the child
872 * process will log the actual verb when it runs.
873 */
874 trace2_cmd_name("_run_git_alias_");
875
876 commit_pager_choice();
877
878 strvec_push(&cmd.args, "git");
879 for (size_t i = 0; i < args->nr; i++)
880 strvec_push(&cmd.args, args->v[i]);
881
882 trace_argv_printf(cmd.args.v, "trace: exec:");
883
884 /*
885 * if we fail because the command is not found, it is
886 * OK to return. Otherwise, we just pass along the status code.
887 */
888 cmd.silent_exec_failure = 1;
889 cmd.clean_on_exit = 1;
890 cmd.wait_after_clean = 1;
891 cmd.trace2_child_class = "git_alias";
892 err = run_command(&cmd);
893 if (err >= 0 || errno != ENOENT)
894 exit(err);
895 die("could not execute builtin %s", args->v[0]);
896 }
897
898 /* .. then try the external ones */
899 execv_dashed_external(args->v);
900
901 /*
902 * It could be an alias -- this works around the insanity
903 * of overriding "git log" with "git show" by having
904 * alias.log = show
905 */
906 if (!handle_alias(args, &expanded_aliases))
907 break;
908 done_alias = 1;
909 }
910
911 string_list_clear(&expanded_aliases, 0);
912
913 return done_alias;
914}
915
916int cmd_main(int argc, const char **argv)
917{
918 struct strvec args = STRVEC_INIT;
919 const char *cmd;
920 int done_help = 0;
921
922 cmd = argv[0];
923 if (!cmd)
924 cmd = "git-help";
925 else {
926 const char *slash = find_last_dir_sep(cmd);
927 if (slash)
928 cmd = slash + 1;
929 }
930
931 trace_command_performance(argv);
932
933 /*
934 * "git-xxxx" is the same as "git xxxx", but we obviously:
935 *
936 * - cannot take flags in between the "git" and the "xxxx".
937 * - cannot execute it externally (since it would just do
938 * the same thing over again)
939 *
940 * So we just directly call the builtin handler, and die if
941 * that one cannot handle it.
942 */
943 if (skip_prefix(cmd, "git-", &cmd)) {
944 strvec_push(&args, cmd);
945 strvec_pushv(&args, argv + 1);
946 handle_builtin(&args);
947 strvec_clear(&args);
948 die(_("cannot handle %s as a builtin"), cmd);
949 }
950
951 /* Look for flags.. */
952 argv++;
953 argc--;
954 handle_options(&argv, &argc, NULL);
955
956 if (!argc) {
957 /* The user didn't specify a command; give them help */
958 commit_pager_choice();
959 printf(_("usage: %s\n\n"), git_usage_string);
960 list_common_cmds_help();
961 printf("\n%s\n", _(git_more_info_string));
962 exit(1);
963 }
964
965 if (!strcmp("--version", argv[0]) || !strcmp("-v", argv[0]))
966 argv[0] = "version";
967 else if (!strcmp("--help", argv[0]) || !strcmp("-h", argv[0]))
968 argv[0] = "help";
969
970 cmd = argv[0];
971
972 /*
973 * We use PATH to find git commands, but we prepend some higher
974 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
975 * environment, and the $(gitexecdir) from the Makefile at build
976 * time.
977 */
978 setup_path();
979
980 for (int i = 0; i < argc; i++)
981 strvec_push(&args, argv[i]);
982
983 while (1) {
984 int was_alias = run_argv(&args);
985 if (errno != ENOENT)
986 break;
987 if (was_alias) {
988 fprintf(stderr, _("expansion of alias '%s' failed; "
989 "'%s' is not a git command\n"),
990 cmd, args.v[0]);
991 strvec_clear(&args);
992 exit(1);
993 }
994 if (!done_help) {
995 char *assumed = help_unknown_cmd(cmd);
996 strvec_replace(&args, 0, assumed);
997 free(assumed);
998 cmd = args.v[0];
999 done_help = 1;
1000 } else {
1001 break;
1002 }
1003 }
1004
1005 fprintf(stderr, _("failed to run command '%s': %s\n"),
1006 cmd, strerror(errno));
1007 strvec_clear(&args);
1008
1009 return 1;
1010}