completion: implement and use --list-cmds=main,others
[git/git.git] / git.c
CommitLineData
85023577 1#include "builtin.h"
b2141fc1 2#include "config.h"
fd5c363d
TF
3#include "exec_cmd.h"
4#include "help.h"
d8e96fd8 5#include "run-command.h"
8e49d503 6
007aa8d8
NTND
7#define RUN_SETUP (1<<0)
8#define RUN_SETUP_GENTLY (1<<1)
9#define USE_PAGER (1<<2)
10/*
11 * require working tree to be present -- anything uses this needs
12 * RUN_SETUP for reading from the configuration file.
13 */
14#define NEED_WORK_TREE (1<<3)
15#define SUPPORT_SUPER_PREFIX (1<<4)
16#define DELAY_PAGER_CONFIG (1<<5)
e9547947 17#define NO_PARSEOPT (1<<6) /* parse-options is not used */
007aa8d8
NTND
18
19struct cmd_struct {
20 const char *cmd;
21 int (*fn)(int, const char **, const char *);
e9547947 22 unsigned int option;
007aa8d8
NTND
23};
24
822a7d50 25const char git_usage_string[] =
fc045fe7
AS
26 N_("git [--version] [--help] [-C <path>] [-c <name>=<value>]\n"
27 " [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
28 " [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]\n"
29 " [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
30 " <command> [<args>]");
822a7d50 31
b7d96819 32const char git_more_info_string[] =
ad5fe377 33 N_("'git help -a' and 'git help -g' list available subcommands and some\n"
73903d0b
PO
34 "concept guides. See 'git help <command>' or 'git help <concept>'\n"
35 "to read about a specific subcommand or concept.");
b7d96819 36
4e10738a 37static int use_pager = -1;
c0562611 38
e5d7a619 39static void list_builtins(struct string_list *list, unsigned int exclude_option);
8893fd95 40
0089521c
NTND
41static int match_token(const char *spec, int len, const char *token)
42{
43 int token_len = strlen(token);
44
45 return len == token_len && !strncmp(spec, token, token_len);
46}
47
48static int list_cmds(const char *spec)
49{
e5d7a619
NTND
50 struct string_list list = STRING_LIST_INIT_DUP;
51 int i;
52
0089521c
NTND
53 while (*spec) {
54 const char *sep = strchrnul(spec, ',');
55 int len = sep - spec;
56
57 if (match_token(spec, len, "builtins"))
e5d7a619 58 list_builtins(&list, 0);
6bb2dc0b
NTND
59 else if (match_token(spec, len, "main"))
60 list_all_main_cmds(&list);
61 else if (match_token(spec, len, "others"))
62 list_all_other_cmds(&list);
0089521c
NTND
63 else
64 die(_("unsupported command listing type '%s'"), spec);
65 spec += len;
66 if (*spec == ',')
67 spec++;
68 }
e5d7a619
NTND
69 for (i = 0; i < list.nr; i++)
70 puts(list.items[i].string);
71 string_list_clear(&list, 0);
0089521c
NTND
72 return 0;
73}
74
4e10738a
JK
75static void commit_pager_choice(void) {
76 switch (use_pager) {
77 case 0:
78 setenv("GIT_PAGER", "cat", 1);
79 break;
80 case 1:
81 setup_pager();
82 break;
83 default:
84 break;
85 }
86}
87
033fe3d9
88void setup_auto_pager(const char *cmd, int def)
89{
90 if (use_pager != -1 || pager_in_use())
91 return;
92 use_pager = check_pager_config(cmd);
93 if (use_pager == -1)
94 use_pager = def;
95 commit_pager_choice();
96}
97
4b25d091 98static int handle_options(const char ***argv, int *argc, int *envchanged)
4ab243a9 99{
73546c08 100 const char **orig_argv = *argv;
4ab243a9
JS
101
102 while (*argc > 0) {
103 const char *cmd = (*argv)[0];
104 if (cmd[0] != '-')
105 break;
106
6acbcb92
JS
107 /*
108 * For legacy reasons, the "version" and "help"
109 * commands can be written with "--" prepended
110 * to make them look like flags.
111 */
112 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
113 break;
114
115 /*
116 * Check remaining flags.
117 */
ae021d87 118 if (skip_prefix(cmd, "--exec-path", &cmd)) {
6acbcb92 119 if (*cmd == '=')
384df833 120 git_set_argv_exec_path(cmd + 1);
6acbcb92
JS
121 else {
122 puts(git_exec_path());
123 exit(0);
124 }
89a56bfb
MH
125 } else if (!strcmp(cmd, "--html-path")) {
126 puts(system_path(GIT_HTML_PATH));
127 exit(0);
f2dd8c37
JS
128 } else if (!strcmp(cmd, "--man-path")) {
129 puts(system_path(GIT_MAN_PATH));
130 exit(0);
131 } else if (!strcmp(cmd, "--info-path")) {
132 puts(system_path(GIT_INFO_PATH));
133 exit(0);
6acbcb92 134 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
4e10738a 135 use_pager = 1;
463a849d 136 } else if (!strcmp(cmd, "--no-pager")) {
4e10738a 137 use_pager = 0;
463a849d
MM
138 if (envchanged)
139 *envchanged = 1;
b0fa7ab5 140 } else if (!strcmp(cmd, "--no-replace-objects")) {
afc711b8 141 check_replace_refs = 0;
6476b38b
CC
142 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
143 if (envchanged)
144 *envchanged = 1;
6acbcb92 145 } else if (!strcmp(cmd, "--git-dir")) {
c321f00d 146 if (*argc < 2) {
fc045fe7 147 fprintf(stderr, _("no directory given for --git-dir\n" ));
c321f00d
BG
148 usage(git_usage_string);
149 }
45b09794 150 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
151 if (envchanged)
152 *envchanged = 1;
6acbcb92
JS
153 (*argv)++;
154 (*argc)--;
ae021d87
JK
155 } else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
156 setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
4394efec
ML
157 if (envchanged)
158 *envchanged = 1;
a1bea2c1
JT
159 } else if (!strcmp(cmd, "--namespace")) {
160 if (*argc < 2) {
fc045fe7 161 fprintf(stderr, _("no namespace given for --namespace\n" ));
a1bea2c1
JT
162 usage(git_usage_string);
163 }
164 setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
165 if (envchanged)
166 *envchanged = 1;
167 (*argv)++;
168 (*argc)--;
ae021d87
JK
169 } else if (skip_prefix(cmd, "--namespace=", &cmd)) {
170 setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
a1bea2c1
JT
171 if (envchanged)
172 *envchanged = 1;
892c41b9
ML
173 } else if (!strcmp(cmd, "--work-tree")) {
174 if (*argc < 2) {
fc045fe7 175 fprintf(stderr, _("no directory given for --work-tree\n" ));
892c41b9
ML
176 usage(git_usage_string);
177 }
178 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
179 if (envchanged)
180 *envchanged = 1;
892c41b9
ML
181 (*argv)++;
182 (*argc)--;
ae021d87
JK
183 } else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
184 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
4394efec
ML
185 if (envchanged)
186 *envchanged = 1;
74866d75
BW
187 } else if (!strcmp(cmd, "--super-prefix")) {
188 if (*argc < 2) {
fc045fe7 189 fprintf(stderr, _("no prefix given for --super-prefix\n" ));
74866d75
BW
190 usage(git_usage_string);
191 }
192 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, (*argv)[1], 1);
193 if (envchanged)
194 *envchanged = 1;
195 (*argv)++;
196 (*argc)--;
197 } else if (skip_prefix(cmd, "--super-prefix=", &cmd)) {
198 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, cmd, 1);
199 if (envchanged)
200 *envchanged = 1;
6acbcb92 201 } else if (!strcmp(cmd, "--bare")) {
4d3ab44d 202 char *cwd = xgetcwd();
6adcca3f 203 is_bare_repository_cfg = 1;
4d3ab44d
RS
204 setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
205 free(cwd);
2cd83d10 206 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
4394efec
ML
207 if (envchanged)
208 *envchanged = 1;
8b1fa778
AR
209 } else if (!strcmp(cmd, "-c")) {
210 if (*argc < 2) {
fc045fe7 211 fprintf(stderr, _("-c expects a configuration string\n" ));
8b1fa778
AR
212 usage(git_usage_string);
213 }
2b64fc89 214 git_config_push_parameter((*argv)[1]);
8b1fa778
AR
215 (*argv)++;
216 (*argc)--;
823ab40f
JK
217 } else if (!strcmp(cmd, "--literal-pathspecs")) {
218 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
219 if (envchanged)
220 *envchanged = 1;
221 } else if (!strcmp(cmd, "--no-literal-pathspecs")) {
222 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
223 if (envchanged)
224 *envchanged = 1;
bd30c2e4
NTND
225 } else if (!strcmp(cmd, "--glob-pathspecs")) {
226 setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
227 if (envchanged)
228 *envchanged = 1;
229 } else if (!strcmp(cmd, "--noglob-pathspecs")) {
230 setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
231 if (envchanged)
232 *envchanged = 1;
93d93537
NTND
233 } else if (!strcmp(cmd, "--icase-pathspecs")) {
234 setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
235 if (envchanged)
236 *envchanged = 1;
27344d6a
JK
237 } else if (!strcmp(cmd, "--no-optional-locks")) {
238 setenv(GIT_OPTIONAL_LOCKS_ENVIRONMENT, "0", 1);
239 if (envchanged)
240 *envchanged = 1;
6035d6aa
NTND
241 } else if (!strcmp(cmd, "--shallow-file")) {
242 (*argv)++;
243 (*argc)--;
069c0532 244 set_alternate_shallow_file((*argv)[0], 1);
6035d6aa
NTND
245 if (envchanged)
246 *envchanged = 1;
44e1e4d6
NR
247 } else if (!strcmp(cmd, "-C")) {
248 if (*argc < 2) {
fc045fe7 249 fprintf(stderr, _("no directory given for -C\n" ));
44e1e4d6
NR
250 usage(git_usage_string);
251 }
6a536e20
KN
252 if ((*argv)[1][0]) {
253 if (chdir((*argv)[1]))
fc045fe7 254 die_errno("cannot change to '%s'", (*argv)[1]);
6a536e20
KN
255 if (envchanged)
256 *envchanged = 1;
257 }
44e1e4d6
NR
258 (*argv)++;
259 (*argc)--;
0089521c
NTND
260 } else if (skip_prefix(cmd, "--list-cmds=", &cmd)) {
261 if (!strcmp(cmd, "parseopt")) {
e5d7a619
NTND
262 struct string_list list = STRING_LIST_INIT_DUP;
263 int i;
264
265 list_builtins(&list, NO_PARSEOPT);
266 for (i = 0; i < list.nr; i++)
267 printf("%s ", list.items[i].string);
268 string_list_clear(&list, 0);
0089521c
NTND
269 exit(0);
270 } else {
271 exit(list_cmds(cmd));
272 }
6acbcb92 273 } else {
fc045fe7 274 fprintf(stderr, _("unknown option: %s\n"), cmd);
822a7d50 275 usage(git_usage_string);
6acbcb92 276 }
4ab243a9
JS
277
278 (*argv)++;
279 (*argc)--;
4ab243a9 280 }
73546c08 281 return (*argv) - orig_argv;
4ab243a9
JS
282}
283
2b11e317
JS
284static int handle_alias(int *argcp, const char ***argv)
285{
af05d679 286 int envchanged = 0, ret = 0, saved_errno = errno;
0347a8c7 287 int count, option_count;
4b25d091 288 const char **new_argv;
94351118
JK
289 const char *alias_command;
290 char *alias_string;
0347a8c7
ML
291
292 alias_command = (*argv)[0];
94351118 293 alias_string = alias_lookup(alias_command);
0347a8c7 294 if (alias_string) {
dfd42a3c 295 if (alias_string[0] == '!') {
850d2fec 296 struct child_process child = CHILD_PROCESS_INIT;
a9bcf658
JS
297 int nongit_ok;
298
299 /* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
300 setup_git_directory_gently(&nongit_ok);
7f51f8bc 301
030149a4 302 commit_pager_choice();
7f51f8bc 303
850d2fec
JK
304 child.use_shell = 1;
305 argv_array_push(&child.args, alias_string + 1);
306 argv_array_pushv(&child.args, (*argv) + 1);
7f51f8bc 307
850d2fec 308 ret = run_command(&child);
7f51f8bc
EFL
309 if (ret >= 0) /* normal exit */
310 exit(ret);
311
fc045fe7 312 die_errno("while expanding alias '%s': '%s'",
7f51f8bc 313 alias_command, alias_string + 1);
dfd42a3c 314 }
0347a8c7 315 count = split_cmdline(alias_string, &new_argv);
dc4179f9 316 if (count < 0)
ad9ac6db
GB
317 die("Bad alias.%s string: %s", alias_command,
318 split_cmdline_strerror(count));
4394efec
ML
319 option_count = handle_options(&new_argv, &count, &envchanged);
320 if (envchanged)
fc045fe7
AS
321 die("alias '%s' changes environment variables.\n"
322 "You can use '!git' in the alias to do this",
4394efec 323 alias_command);
0347a8c7
ML
324 memmove(new_argv - option_count, new_argv,
325 count * sizeof(char *));
326 new_argv -= option_count;
327
328 if (count < 1)
329 die("empty alias for %s", alias_command);
330
331 if (!strcmp(alias_command, new_argv[0]))
332 die("recursive alias: %s", alias_command);
333
b319ce4c 334 trace_argv_printf(new_argv,
6ce4e61f
CC
335 "trace: alias expansion: %s =>",
336 alias_command);
575ba9d6 337
2756ca43 338 REALLOC_ARRAY(new_argv, count + *argcp);
0347a8c7 339 /* insert after command name */
4b25d091 340 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
2b11e317 341
0347a8c7
ML
342 *argv = new_argv;
343 *argcp += count - 1;
2b11e317 344
0347a8c7 345 ret = 1;
2b11e317
JS
346 }
347
47e5c0ca
JS
348 errno = saved_errno;
349
2b11e317
JS
350 return ret;
351}
352
f172f334 353static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
47d0b4ff 354{
99caeed0 355 int status, help;
0f157315 356 struct stat st;
47d0b4ff
LT
357 const char *prefix;
358
359 prefix = NULL;
99caeed0
JN
360 help = argc == 2 && !strcmp(argv[1], "-h");
361 if (!help) {
362 if (p->option & RUN_SETUP)
363 prefix = setup_git_directory();
27bd38d4 364 else if (p->option & RUN_SETUP_GENTLY) {
ee38dfb8
NTND
365 int nongit_ok;
366 prefix = setup_git_directory_gently(&nongit_ok);
367 }
99caeed0 368
c409824c
369 if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY) &&
370 !(p->option & DELAY_PAGER_CONFIG))
99caeed0
JN
371 use_pager = check_pager_config(p->cmd);
372 if (use_pager == -1 && p->option & USE_PAGER)
373 use_pager = 1;
a9ca8a85
NTND
374
375 if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
376 startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
377 trace_repo_setup(prefix);
99caeed0 378 }
4e10738a
JK
379 commit_pager_choice();
380
74866d75
BW
381 if (!help && get_super_prefix()) {
382 if (!(p->option & SUPPORT_SUPER_PREFIX))
383 die("%s doesn't support --super-prefix", p->cmd);
74866d75
BW
384 }
385
99caeed0 386 if (!help && p->option & NEED_WORK_TREE)
59f0f2f3
MH
387 setup_work_tree();
388
b319ce4c 389 trace_argv_printf(argv, "trace: built-in: git");
47d0b4ff 390
0f157315
LT
391 status = p->fn(argc, argv, prefix);
392 if (status)
47e3de0e 393 return status;
0f157315
LT
394
395 /* Somebody closed stdout? */
396 if (fstat(fileno(stdout), &st))
397 return 0;
398 /* Ignore write errors for pipes and sockets.. */
399 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
400 return 0;
401
402 /* Check for ENOSPC and EIO errors.. */
0227f988 403 if (fflush(stdout))
d824cbba 404 die_errno("write failure on standard output");
0227f988
LT
405 if (ferror(stdout))
406 die("unknown write failure on standard output");
407 if (fclose(stdout))
d824cbba 408 die_errno("close failed on standard output");
0f157315 409 return 0;
47d0b4ff
LT
410}
411
c6127fa3
SS
412static struct cmd_struct commands[] = {
413 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
783d7e86 414 { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
e9547947 415 { "annotate", cmd_annotate, RUN_SETUP | NO_PARSEOPT },
c6127fa3 416 { "apply", cmd_apply, RUN_SETUP_GENTLY },
eb0224c6 417 { "archive", cmd_archive, RUN_SETUP_GENTLY },
c6127fa3
SS
418 { "bisect--helper", cmd_bisect__helper, RUN_SETUP },
419 { "blame", cmd_blame, RUN_SETUP },
d74b541e 420 { "branch", cmd_branch, RUN_SETUP | DELAY_PAGER_CONFIG },
e9547947 421 { "bundle", cmd_bundle, RUN_SETUP_GENTLY | NO_PARSEOPT },
c6127fa3
SS
422 { "cat-file", cmd_cat_file, RUN_SETUP },
423 { "check-attr", cmd_check_attr, RUN_SETUP },
424 { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
425 { "check-mailmap", cmd_check_mailmap, RUN_SETUP },
e9547947 426 { "check-ref-format", cmd_check_ref_format, NO_PARSEOPT },
0ca560cb 427 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
c6127fa3
SS
428 { "checkout-index", cmd_checkout_index,
429 RUN_SETUP | NEED_WORK_TREE},
430 { "cherry", cmd_cherry, RUN_SETUP },
431 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
432 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
86d26f24 433 { "clone", cmd_clone },
c6127fa3
SS
434 { "column", cmd_column, RUN_SETUP_GENTLY },
435 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
e9547947 436 { "commit-tree", cmd_commit_tree, RUN_SETUP | NO_PARSEOPT },
32888b8f 437 { "config", cmd_config, RUN_SETUP_GENTLY | DELAY_PAGER_CONFIG },
c6127fa3 438 { "count-objects", cmd_count_objects, RUN_SETUP },
e9547947 439 { "credential", cmd_credential, RUN_SETUP_GENTLY | NO_PARSEOPT },
c6127fa3 440 { "describe", cmd_describe, RUN_SETUP },
e9547947
NTND
441 { "diff", cmd_diff, NO_PARSEOPT },
442 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
443 { "diff-index", cmd_diff_index, RUN_SETUP | NO_PARSEOPT },
444 { "diff-tree", cmd_diff_tree, RUN_SETUP | NO_PARSEOPT },
019678d6 445 { "difftool", cmd_difftool, RUN_SETUP | NEED_WORK_TREE },
c6127fa3
SS
446 { "fast-export", cmd_fast_export, RUN_SETUP },
447 { "fetch", cmd_fetch, RUN_SETUP },
e9547947 448 { "fetch-pack", cmd_fetch_pack, RUN_SETUP | NO_PARSEOPT },
c6127fa3
SS
449 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
450 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
451 { "format-patch", cmd_format_patch, RUN_SETUP },
452 { "fsck", cmd_fsck, RUN_SETUP },
453 { "fsck-objects", cmd_fsck, RUN_SETUP },
454 { "gc", cmd_gc, RUN_SETUP },
e9547947 455 { "get-tar-commit-id", cmd_get_tar_commit_id, NO_PARSEOPT },
f9ee2fcd 456 { "grep", cmd_grep, RUN_SETUP_GENTLY },
c6127fa3
SS
457 { "hash-object", cmd_hash_object },
458 { "help", cmd_help },
e9547947 459 { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY | NO_PARSEOPT },
86d26f24
NTND
460 { "init", cmd_init_db },
461 { "init-db", cmd_init_db },
cbd9fc23 462 { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
c6127fa3 463 { "log", cmd_log, RUN_SETUP },
188dce13 464 { "ls-files", cmd_ls_files, RUN_SETUP },
c6127fa3
SS
465 { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
466 { "ls-tree", cmd_ls_tree, RUN_SETUP },
e9547947
NTND
467 { "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY | NO_PARSEOPT },
468 { "mailsplit", cmd_mailsplit, NO_PARSEOPT },
c6127fa3
SS
469 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
470 { "merge-base", cmd_merge_base, RUN_SETUP },
471 { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
e9547947
NTND
472 { "merge-index", cmd_merge_index, RUN_SETUP | NO_PARSEOPT },
473 { "merge-ours", cmd_merge_ours, RUN_SETUP | NO_PARSEOPT },
474 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
475 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
476 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
477 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
478 { "merge-tree", cmd_merge_tree, RUN_SETUP | NO_PARSEOPT },
479 { "mktag", cmd_mktag, RUN_SETUP | NO_PARSEOPT },
c6127fa3
SS
480 { "mktree", cmd_mktree, RUN_SETUP },
481 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
482 { "name-rev", cmd_name_rev, RUN_SETUP },
483 { "notes", cmd_notes, RUN_SETUP },
484 { "pack-objects", cmd_pack_objects, RUN_SETUP },
e9547947 485 { "pack-redundant", cmd_pack_redundant, RUN_SETUP | NO_PARSEOPT },
c6127fa3 486 { "pack-refs", cmd_pack_refs, RUN_SETUP },
e9547947 487 { "patch-id", cmd_patch_id, RUN_SETUP_GENTLY | NO_PARSEOPT },
c6127fa3
SS
488 { "pickaxe", cmd_blame, RUN_SETUP },
489 { "prune", cmd_prune, RUN_SETUP },
490 { "prune-packed", cmd_prune_packed, RUN_SETUP },
1e1ea69f 491 { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
c6127fa3 492 { "push", cmd_push, RUN_SETUP },
3d415425 493 { "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX},
4557f1ad 494 { "rebase--helper", cmd_rebase__helper, RUN_SETUP | NEED_WORK_TREE },
c6127fa3
SS
495 { "receive-pack", cmd_receive_pack },
496 { "reflog", cmd_reflog, RUN_SETUP },
497 { "remote", cmd_remote, RUN_SETUP },
e9547947
NTND
498 { "remote-ext", cmd_remote_ext, NO_PARSEOPT },
499 { "remote-fd", cmd_remote_fd, NO_PARSEOPT },
c6127fa3
SS
500 { "repack", cmd_repack, RUN_SETUP },
501 { "replace", cmd_replace, RUN_SETUP },
502 { "rerere", cmd_rerere, RUN_SETUP },
503 { "reset", cmd_reset, RUN_SETUP },
e9547947
NTND
504 { "rev-list", cmd_rev_list, RUN_SETUP | NO_PARSEOPT },
505 { "rev-parse", cmd_rev_parse, NO_PARSEOPT },
c6127fa3
SS
506 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
507 { "rm", cmd_rm, RUN_SETUP },
508 { "send-pack", cmd_send_pack, RUN_SETUP },
509 { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
510 { "show", cmd_show, RUN_SETUP },
511 { "show-branch", cmd_show_branch, RUN_SETUP },
512 { "show-ref", cmd_show_ref, RUN_SETUP },
513 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
514 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
515 { "stripspace", cmd_stripspace },
e9547947 516 { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX | NO_PARSEOPT },
c6127fa3 517 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
de121ffe 518 { "tag", cmd_tag, RUN_SETUP | DELAY_PAGER_CONFIG },
e9547947
NTND
519 { "unpack-file", cmd_unpack_file, RUN_SETUP | NO_PARSEOPT },
520 { "unpack-objects", cmd_unpack_objects, RUN_SETUP | NO_PARSEOPT },
c6127fa3
SS
521 { "update-index", cmd_update_index, RUN_SETUP },
522 { "update-ref", cmd_update_ref, RUN_SETUP },
523 { "update-server-info", cmd_update_server_info, RUN_SETUP },
e9547947
NTND
524 { "upload-archive", cmd_upload_archive, NO_PARSEOPT },
525 { "upload-archive--writer", cmd_upload_archive_writer, NO_PARSEOPT },
526 { "var", cmd_var, RUN_SETUP_GENTLY | NO_PARSEOPT },
d07b00b7 527 { "verify-commit", cmd_verify_commit, RUN_SETUP },
c6127fa3
SS
528 { "verify-pack", cmd_verify_pack },
529 { "verify-tag", cmd_verify_tag, RUN_SETUP },
530 { "version", cmd_version },
531 { "whatchanged", cmd_whatchanged, RUN_SETUP },
e9547947 532 { "worktree", cmd_worktree, RUN_SETUP | NO_PARSEOPT },
c6127fa3
SS
533 { "write-tree", cmd_write_tree, RUN_SETUP },
534};
535
c4f901d1 536static struct cmd_struct *get_builtin(const char *s)
c6127fa3
SS
537{
538 int i;
539 for (i = 0; i < ARRAY_SIZE(commands); i++) {
c4f901d1 540 struct cmd_struct *p = commands + i;
c6127fa3 541 if (!strcmp(s, p->cmd))
c4f901d1 542 return p;
c6127fa3 543 }
c4f901d1
SV
544 return NULL;
545}
546
547int is_builtin(const char *s)
548{
549 return !!get_builtin(s);
c6127fa3
SS
550}
551
e5d7a619 552static void list_builtins(struct string_list *out, unsigned int exclude_option)
8893fd95
JK
553{
554 int i;
e9547947
NTND
555 for (i = 0; i < ARRAY_SIZE(commands); i++) {
556 if (exclude_option &&
557 (commands[i].option & exclude_option))
558 continue;
e5d7a619 559 string_list_append(out, commands[i].cmd);
e9547947 560 }
8893fd95
JK
561}
562
63ca1c09
AK
563#ifdef STRIP_EXTENSION
564static void strip_extension(const char **argv)
565{
566 size_t len;
567
568 if (strip_suffix(argv[0], STRIP_EXTENSION, &len))
569 argv[0] = xmemdupz(argv[0], len);
570}
571#else
572#define strip_extension(cmd)
573#endif
574
3f784a4d 575static void handle_builtin(int argc, const char **argv)
231af832 576{
2c6b6d9f 577 struct argv_array args = ARGV_ARRAY_INIT;
63ca1c09 578 const char *cmd;
c4f901d1 579 struct cmd_struct *builtin;
23326d14 580
63ca1c09
AK
581 strip_extension(argv);
582 cmd = argv[0];
231af832 583
2c6b6d9f 584 /* Turn "git cmd --help" into "git help --exclude-guides cmd" */
1cd95087 585 if (argc > 1 && !strcmp(argv[1], "--help")) {
2c6b6d9f
RT
586 int i;
587
1cd95087
LT
588 argv[1] = argv[0];
589 argv[0] = cmd = "help";
2c6b6d9f
RT
590
591 for (i = 0; i < argc; i++) {
592 argv_array_push(&args, argv[i]);
593 if (!i)
594 argv_array_push(&args, "--exclude-guides");
595 }
596
597 argc++;
598 argv = args.argv;
1cd95087
LT
599 }
600
c4f901d1 601 builtin = get_builtin(cmd);
441981bc
JH
602 if (builtin)
603 exit(run_builtin(builtin, argc, argv));
2c6b6d9f 604 argv_array_clear(&args);
231af832
LT
605}
606
7550be0a
JH
607static void execv_dashed_external(const char **argv)
608{
2b296c93 609 struct child_process cmd = CHILD_PROCESS_INIT;
d8e96fd8 610 int status;
7550be0a 611
74866d75
BW
612 if (get_super_prefix())
613 die("%s doesn't support --super-prefix", argv[0]);
614
595d59e2 615 if (use_pager == -1 && !is_builtin(argv[0]))
92058e4d 616 use_pager = check_pager_config(argv[0]);
030149a4
JN
617 commit_pager_choice();
618
2b296c93
JK
619 argv_array_pushf(&cmd.args, "git-%s", argv[0]);
620 argv_array_pushv(&cmd.args, argv + 1);
621 cmd.clean_on_exit = 1;
46df6906 622 cmd.wait_after_clean = 1;
2b296c93 623 cmd.silent_exec_failure = 1;
7550be0a 624
2b296c93 625 trace_argv_printf(cmd.args.argv, "trace: exec:");
7550be0a 626
d8e96fd8 627 /*
246f0ede
JK
628 * If we fail because the command is not found, it is
629 * OK to return. Otherwise, we just pass along the status code,
630 * or our usual generic code if we were not even able to exec
631 * the program.
d8e96fd8 632 */
2b296c93 633 status = run_command(&cmd);
246f0ede 634 if (status >= 0)
5709e036 635 exit(status);
246f0ede
JK
636 else if (errno != ENOENT)
637 exit(128);
7550be0a
JH
638}
639
a907e1b6
AS
640static int run_argv(int *argcp, const char ***argv)
641{
642 int done_alias = 0;
643
644 while (1) {
441981bc
JH
645 /*
646 * If we tried alias and futzed with our environment,
647 * it no longer is safe to invoke builtins directly in
648 * general. We have to spawn them as dashed externals.
649 *
650 * NEEDSWORK: if we can figure out cases
651 * where it is safe to do, we can avoid spawning a new
652 * process.
653 */
654 if (!done_alias)
655 handle_builtin(*argcp, *argv);
a907e1b6
AS
656
657 /* .. then try the external ones */
658 execv_dashed_external(*argv);
659
660 /* It could be an alias -- this works around the insanity
661 * of overriding "git log" with "git show" by having
662 * alias.log = show
663 */
c0562611
NTND
664 if (done_alias)
665 break;
c0562611 666 if (!handle_alias(argcp, argv))
a907e1b6
AS
667 break;
668 done_alias = 1;
669 }
670
671 return done_alias;
672}
673
3f2e2297 674int cmd_main(int argc, const char **argv)
8e49d503 675{
4dd47c3b 676 const char *cmd;
8fa7975b 677 int done_help = 0;
231af832 678
650c4492 679 cmd = argv[0];
2cd72b0b 680 if (!cmd)
4dd47c3b 681 cmd = "git-help";
6854a8f5
JK
682 else {
683 const char *slash = find_last_dir_sep(cmd);
684 if (slash)
685 cmd = slash + 1;
686 }
8e49d503 687
578da039
KB
688 trace_command_performance(argv);
689
231af832
LT
690 /*
691 * "git-xxxx" is the same as "git xxxx", but we obviously:
692 *
693 * - cannot take flags in between the "git" and the "xxxx".
694 * - cannot execute it externally (since it would just do
695 * the same thing over again)
696 *
3f784a4d
SS
697 * So we just directly call the builtin handler, and die if
698 * that one cannot handle it.
231af832 699 */
ae021d87 700 if (skip_prefix(cmd, "git-", &cmd)) {
231af832 701 argv[0] = cmd;
3f784a4d
SS
702 handle_builtin(argc, argv);
703 die("cannot handle %s as a builtin", cmd);
231af832 704 }
8e49d503 705
231af832 706 /* Look for flags.. */
6acbcb92
JS
707 argv++;
708 argc--;
4394efec 709 handle_options(&argv, &argc, NULL);
6acbcb92 710 if (argc > 0) {
6d877803
JK
711 /* translate --help and --version into commands */
712 skip_prefix(argv[0], "--", &argv[0]);
6acbcb92 713 } else {
3d7e2d85 714 /* The user didn't specify a command; give them help */
73e25e7c 715 commit_pager_choice();
3d7e2d85
SP
716 printf("usage: %s\n\n", git_usage_string);
717 list_common_cmds_help();
421a9769 718 printf("\n%s\n", _(git_more_info_string));
3d7e2d85 719 exit(1);
97fc6c5f 720 }
6acbcb92 721 cmd = argv[0];
231af832
LT
722
723 /*
511707d4 724 * We use PATH to find git commands, but we prepend some higher
3ea3c215 725 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
511707d4
SP
726 * environment, and the $(gitexecdir) from the Makefile at build
727 * time.
231af832 728 */
e1464ca7 729 setup_path();
8e49d503 730
a025463b 731 while (1) {
8fa7975b 732 int was_alias = run_argv(&argc, &argv);
a907e1b6 733 if (errno != ENOENT)
a025463b 734 break;
a907e1b6 735 if (was_alias) {
fc045fe7
AS
736 fprintf(stderr, _("expansion of alias '%s' failed; "
737 "'%s' is not a git command\n"),
f3dd015c
TT
738 cmd, argv[0]);
739 exit(1);
740 }
a907e1b6
AS
741 if (!done_help) {
742 cmd = argv[0] = help_unknown_cmd(cmd);
743 done_help = 1;
744 } else
745 break;
f3dd015c 746 }
10b15b86 747
fc045fe7 748 fprintf(stderr, _("failed to run command '%s': %s\n"),
33ebb871 749 cmd, strerror(errno));
8e49d503
AE
750
751 return 1;
752}