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