Merge branch 'ts/alias-of-alias'
[git/git.git] / git.c
CommitLineData
85023577 1#include "builtin.h"
b2141fc1 2#include "config.h"
d807c4a0 3#include "exec-cmd.h"
fd5c363d 4#include "help.h"
d8e96fd8 5#include "run-command.h"
65b5f948 6#include "alias.h"
8e49d503 7
007aa8d8
NTND
8#define RUN_SETUP (1<<0)
9#define RUN_SETUP_GENTLY (1<<1)
10#define USE_PAGER (1<<2)
11/*
12 * require working tree to be present -- anything uses this needs
13 * RUN_SETUP for reading from the configuration file.
14 */
15#define NEED_WORK_TREE (1<<3)
16#define SUPPORT_SUPER_PREFIX (1<<4)
17#define DELAY_PAGER_CONFIG (1<<5)
e9547947 18#define NO_PARSEOPT (1<<6) /* parse-options is not used */
007aa8d8
NTND
19
20struct cmd_struct {
21 const char *cmd;
22 int (*fn)(int, const char **, const char *);
e9547947 23 unsigned int option;
007aa8d8
NTND
24};
25
822a7d50 26const char git_usage_string[] =
fc045fe7
AS
27 N_("git [--version] [--help] [-C <path>] [-c <name>=<value>]\n"
28 " [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
7213c288 29 " [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--bare]\n"
fc045fe7
AS
30 " [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
31 " <command> [<args>]");
822a7d50 32
b7d96819 33const char git_more_info_string[] =
ad5fe377 34 N_("'git help -a' and 'git help -g' list available subcommands and some\n"
73903d0b
PO
35 "concept guides. See 'git help <command>' or 'git help <concept>'\n"
36 "to read about a specific subcommand or concept.");
b7d96819 37
4e10738a 38static int use_pager = -1;
c0562611 39
e5d7a619 40static void list_builtins(struct string_list *list, unsigned int exclude_option);
8893fd95 41
e11dca10
NTND
42static void exclude_helpers_from_list(struct string_list *list)
43{
44 int i = 0;
45
46 while (i < list->nr) {
47 if (strstr(list->items[i].string, "--"))
48 unsorted_string_list_delete_item(list, i, 0);
49 else
50 i++;
51 }
52}
53
0089521c
NTND
54static int match_token(const char *spec, int len, const char *token)
55{
56 int token_len = strlen(token);
57
58 return len == token_len && !strncmp(spec, token, token_len);
59}
60
61static int list_cmds(const char *spec)
62{
e5d7a619
NTND
63 struct string_list list = STRING_LIST_INIT_DUP;
64 int i;
65
0089521c
NTND
66 while (*spec) {
67 const char *sep = strchrnul(spec, ',');
68 int len = sep - spec;
69
70 if (match_token(spec, len, "builtins"))
e5d7a619 71 list_builtins(&list, 0);
6bb2dc0b
NTND
72 else if (match_token(spec, len, "main"))
73 list_all_main_cmds(&list);
74 else if (match_token(spec, len, "others"))
75 list_all_other_cmds(&list);
e11dca10
NTND
76 else if (match_token(spec, len, "nohelpers"))
77 exclude_helpers_from_list(&list);
3301d36b
NTND
78 else if (match_token(spec, len, "alias"))
79 list_aliases(&list);
6532f374
NTND
80 else if (match_token(spec, len, "config"))
81 list_cmds_by_config(&list);
3c777767
NTND
82 else if (len > 5 && !strncmp(spec, "list-", 5)) {
83 struct strbuf sb = STRBUF_INIT;
84
85 strbuf_add(&sb, spec + 5, len - 5);
86 list_cmds_by_category(&list, sb.buf);
87 strbuf_release(&sb);
88 }
0089521c
NTND
89 else
90 die(_("unsupported command listing type '%s'"), spec);
91 spec += len;
92 if (*spec == ',')
93 spec++;
94 }
e5d7a619
NTND
95 for (i = 0; i < list.nr; i++)
96 puts(list.items[i].string);
97 string_list_clear(&list, 0);
0089521c
NTND
98 return 0;
99}
8893fd95 100
4e10738a
JK
101static void commit_pager_choice(void) {
102 switch (use_pager) {
103 case 0:
104 setenv("GIT_PAGER", "cat", 1);
105 break;
106 case 1:
107 setup_pager();
108 break;
109 default:
110 break;
111 }
112}
113
033fe3d9
114void setup_auto_pager(const char *cmd, int def)
115{
116 if (use_pager != -1 || pager_in_use())
117 return;
118 use_pager = check_pager_config(cmd);
119 if (use_pager == -1)
120 use_pager = def;
121 commit_pager_choice();
122}
123
4b25d091 124static int handle_options(const char ***argv, int *argc, int *envchanged)
4ab243a9 125{
73546c08 126 const char **orig_argv = *argv;
4ab243a9
JS
127
128 while (*argc > 0) {
129 const char *cmd = (*argv)[0];
130 if (cmd[0] != '-')
131 break;
132
6acbcb92
JS
133 /*
134 * For legacy reasons, the "version" and "help"
135 * commands can be written with "--" prepended
136 * to make them look like flags.
137 */
138 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
139 break;
140
141 /*
142 * Check remaining flags.
143 */
ae021d87 144 if (skip_prefix(cmd, "--exec-path", &cmd)) {
6acbcb92 145 if (*cmd == '=')
226c0ddd 146 git_set_exec_path(cmd + 1);
6acbcb92
JS
147 else {
148 puts(git_exec_path());
149 exit(0);
150 }
89a56bfb
MH
151 } else if (!strcmp(cmd, "--html-path")) {
152 puts(system_path(GIT_HTML_PATH));
153 exit(0);
f2dd8c37
JS
154 } else if (!strcmp(cmd, "--man-path")) {
155 puts(system_path(GIT_MAN_PATH));
156 exit(0);
157 } else if (!strcmp(cmd, "--info-path")) {
158 puts(system_path(GIT_INFO_PATH));
159 exit(0);
6acbcb92 160 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
4e10738a 161 use_pager = 1;
7213c288 162 } else if (!strcmp(cmd, "-P") || !strcmp(cmd, "--no-pager")) {
4e10738a 163 use_pager = 0;
463a849d
MM
164 if (envchanged)
165 *envchanged = 1;
b0fa7ab5 166 } else if (!strcmp(cmd, "--no-replace-objects")) {
6ebd1caf 167 read_replace_refs = 0;
6476b38b
CC
168 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
169 if (envchanged)
170 *envchanged = 1;
6acbcb92 171 } else if (!strcmp(cmd, "--git-dir")) {
c321f00d 172 if (*argc < 2) {
fc045fe7 173 fprintf(stderr, _("no directory given for --git-dir\n" ));
c321f00d
BG
174 usage(git_usage_string);
175 }
45b09794 176 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
177 if (envchanged)
178 *envchanged = 1;
6acbcb92
JS
179 (*argv)++;
180 (*argc)--;
ae021d87
JK
181 } else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
182 setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
4394efec
ML
183 if (envchanged)
184 *envchanged = 1;
a1bea2c1
JT
185 } else if (!strcmp(cmd, "--namespace")) {
186 if (*argc < 2) {
fc045fe7 187 fprintf(stderr, _("no namespace given for --namespace\n" ));
a1bea2c1
JT
188 usage(git_usage_string);
189 }
190 setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
191 if (envchanged)
192 *envchanged = 1;
193 (*argv)++;
194 (*argc)--;
ae021d87
JK
195 } else if (skip_prefix(cmd, "--namespace=", &cmd)) {
196 setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
a1bea2c1
JT
197 if (envchanged)
198 *envchanged = 1;
892c41b9
ML
199 } else if (!strcmp(cmd, "--work-tree")) {
200 if (*argc < 2) {
fc045fe7 201 fprintf(stderr, _("no directory given for --work-tree\n" ));
892c41b9
ML
202 usage(git_usage_string);
203 }
204 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
205 if (envchanged)
206 *envchanged = 1;
892c41b9
ML
207 (*argv)++;
208 (*argc)--;
ae021d87
JK
209 } else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
210 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
4394efec
ML
211 if (envchanged)
212 *envchanged = 1;
74866d75
BW
213 } else if (!strcmp(cmd, "--super-prefix")) {
214 if (*argc < 2) {
fc045fe7 215 fprintf(stderr, _("no prefix given for --super-prefix\n" ));
74866d75
BW
216 usage(git_usage_string);
217 }
218 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, (*argv)[1], 1);
219 if (envchanged)
220 *envchanged = 1;
221 (*argv)++;
222 (*argc)--;
223 } else if (skip_prefix(cmd, "--super-prefix=", &cmd)) {
224 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, cmd, 1);
225 if (envchanged)
226 *envchanged = 1;
6acbcb92 227 } else if (!strcmp(cmd, "--bare")) {
4d3ab44d 228 char *cwd = xgetcwd();
6adcca3f 229 is_bare_repository_cfg = 1;
4d3ab44d
RS
230 setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
231 free(cwd);
2cd83d10 232 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
4394efec
ML
233 if (envchanged)
234 *envchanged = 1;
8b1fa778
AR
235 } else if (!strcmp(cmd, "-c")) {
236 if (*argc < 2) {
fc045fe7 237 fprintf(stderr, _("-c expects a configuration string\n" ));
8b1fa778
AR
238 usage(git_usage_string);
239 }
2b64fc89 240 git_config_push_parameter((*argv)[1]);
8b1fa778
AR
241 (*argv)++;
242 (*argc)--;
823ab40f
JK
243 } else if (!strcmp(cmd, "--literal-pathspecs")) {
244 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
245 if (envchanged)
246 *envchanged = 1;
247 } else if (!strcmp(cmd, "--no-literal-pathspecs")) {
248 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
249 if (envchanged)
250 *envchanged = 1;
bd30c2e4
NTND
251 } else if (!strcmp(cmd, "--glob-pathspecs")) {
252 setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
253 if (envchanged)
254 *envchanged = 1;
255 } else if (!strcmp(cmd, "--noglob-pathspecs")) {
256 setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
257 if (envchanged)
258 *envchanged = 1;
93d93537
NTND
259 } else if (!strcmp(cmd, "--icase-pathspecs")) {
260 setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
261 if (envchanged)
262 *envchanged = 1;
27344d6a
JK
263 } else if (!strcmp(cmd, "--no-optional-locks")) {
264 setenv(GIT_OPTIONAL_LOCKS_ENVIRONMENT, "0", 1);
265 if (envchanged)
266 *envchanged = 1;
6035d6aa
NTND
267 } else if (!strcmp(cmd, "--shallow-file")) {
268 (*argv)++;
269 (*argc)--;
6a2df51c 270 set_alternate_shallow_file(the_repository, (*argv)[0], 1);
6035d6aa
NTND
271 if (envchanged)
272 *envchanged = 1;
44e1e4d6
NR
273 } else if (!strcmp(cmd, "-C")) {
274 if (*argc < 2) {
fc045fe7 275 fprintf(stderr, _("no directory given for -C\n" ));
44e1e4d6
NR
276 usage(git_usage_string);
277 }
6a536e20
KN
278 if ((*argv)[1][0]) {
279 if (chdir((*argv)[1]))
fc045fe7 280 die_errno("cannot change to '%s'", (*argv)[1]);
6a536e20
KN
281 if (envchanged)
282 *envchanged = 1;
283 }
44e1e4d6
NR
284 (*argv)++;
285 (*argc)--;
0089521c
NTND
286 } else if (skip_prefix(cmd, "--list-cmds=", &cmd)) {
287 if (!strcmp(cmd, "parseopt")) {
e5d7a619
NTND
288 struct string_list list = STRING_LIST_INIT_DUP;
289 int i;
290
291 list_builtins(&list, NO_PARSEOPT);
292 for (i = 0; i < list.nr; i++)
293 printf("%s ", list.items[i].string);
294 string_list_clear(&list, 0);
0089521c
NTND
295 exit(0);
296 } else {
297 exit(list_cmds(cmd));
298 }
6acbcb92 299 } else {
fc045fe7 300 fprintf(stderr, _("unknown option: %s\n"), cmd);
822a7d50 301 usage(git_usage_string);
6acbcb92 302 }
4ab243a9
JS
303
304 (*argv)++;
305 (*argc)--;
4ab243a9 306 }
73546c08 307 return (*argv) - orig_argv;
4ab243a9
JS
308}
309
2b11e317
JS
310static int handle_alias(int *argcp, const char ***argv)
311{
af05d679 312 int envchanged = 0, ret = 0, saved_errno = errno;
0347a8c7 313 int count, option_count;
4b25d091 314 const char **new_argv;
94351118
JK
315 const char *alias_command;
316 char *alias_string;
0347a8c7
ML
317
318 alias_command = (*argv)[0];
94351118 319 alias_string = alias_lookup(alias_command);
0347a8c7 320 if (alias_string) {
dfd42a3c 321 if (alias_string[0] == '!') {
850d2fec 322 struct child_process child = CHILD_PROCESS_INIT;
a9bcf658
JS
323 int nongit_ok;
324
325 /* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
326 setup_git_directory_gently(&nongit_ok);
7f51f8bc 327
030149a4 328 commit_pager_choice();
7f51f8bc 329
850d2fec
JK
330 child.use_shell = 1;
331 argv_array_push(&child.args, alias_string + 1);
332 argv_array_pushv(&child.args, (*argv) + 1);
7f51f8bc 333
850d2fec 334 ret = run_command(&child);
7f51f8bc
EFL
335 if (ret >= 0) /* normal exit */
336 exit(ret);
337
fc045fe7 338 die_errno("while expanding alias '%s': '%s'",
7f51f8bc 339 alias_command, alias_string + 1);
dfd42a3c 340 }
0347a8c7 341 count = split_cmdline(alias_string, &new_argv);
dc4179f9 342 if (count < 0)
ad9ac6db
GB
343 die("Bad alias.%s string: %s", alias_command,
344 split_cmdline_strerror(count));
4394efec
ML
345 option_count = handle_options(&new_argv, &count, &envchanged);
346 if (envchanged)
fc045fe7
AS
347 die("alias '%s' changes environment variables.\n"
348 "You can use '!git' in the alias to do this",
4394efec 349 alias_command);
0347a8c7
ML
350 memmove(new_argv - option_count, new_argv,
351 count * sizeof(char *));
352 new_argv -= option_count;
353
354 if (count < 1)
355 die("empty alias for %s", alias_command);
356
357 if (!strcmp(alias_command, new_argv[0]))
358 die("recursive alias: %s", alias_command);
359
b319ce4c 360 trace_argv_printf(new_argv,
6ce4e61f
CC
361 "trace: alias expansion: %s =>",
362 alias_command);
575ba9d6 363
2756ca43 364 REALLOC_ARRAY(new_argv, count + *argcp);
0347a8c7 365 /* insert after command name */
4b25d091 366 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
2b11e317 367
0347a8c7
ML
368 *argv = new_argv;
369 *argcp += count - 1;
2b11e317 370
0347a8c7 371 ret = 1;
2b11e317
JS
372 }
373
47e5c0ca
JS
374 errno = saved_errno;
375
2b11e317
JS
376 return ret;
377}
378
f172f334 379static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
47d0b4ff 380{
99caeed0 381 int status, help;
0f157315 382 struct stat st;
47d0b4ff
LT
383 const char *prefix;
384
385 prefix = NULL;
99caeed0
JN
386 help = argc == 2 && !strcmp(argv[1], "-h");
387 if (!help) {
388 if (p->option & RUN_SETUP)
389 prefix = setup_git_directory();
27bd38d4 390 else if (p->option & RUN_SETUP_GENTLY) {
ee38dfb8
NTND
391 int nongit_ok;
392 prefix = setup_git_directory_gently(&nongit_ok);
393 }
99caeed0 394
c409824c
395 if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY) &&
396 !(p->option & DELAY_PAGER_CONFIG))
99caeed0
JN
397 use_pager = check_pager_config(p->cmd);
398 if (use_pager == -1 && p->option & USE_PAGER)
399 use_pager = 1;
a9ca8a85
NTND
400
401 if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
402 startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
403 trace_repo_setup(prefix);
99caeed0 404 }
4e10738a
JK
405 commit_pager_choice();
406
74866d75
BW
407 if (!help && get_super_prefix()) {
408 if (!(p->option & SUPPORT_SUPER_PREFIX))
409 die("%s doesn't support --super-prefix", p->cmd);
74866d75
BW
410 }
411
99caeed0 412 if (!help && p->option & NEED_WORK_TREE)
59f0f2f3
MH
413 setup_work_tree();
414
b319ce4c 415 trace_argv_printf(argv, "trace: built-in: git");
47d0b4ff 416
8616a2d0 417 validate_cache_entries(&the_index);
0f157315 418 status = p->fn(argc, argv, prefix);
8616a2d0
JM
419 validate_cache_entries(&the_index);
420
0f157315 421 if (status)
47e3de0e 422 return status;
0f157315
LT
423
424 /* Somebody closed stdout? */
425 if (fstat(fileno(stdout), &st))
426 return 0;
427 /* Ignore write errors for pipes and sockets.. */
428 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
429 return 0;
430
431 /* Check for ENOSPC and EIO errors.. */
0227f988 432 if (fflush(stdout))
d824cbba 433 die_errno("write failure on standard output");
0227f988
LT
434 if (ferror(stdout))
435 die("unknown write failure on standard output");
436 if (fclose(stdout))
d824cbba 437 die_errno("close failed on standard output");
0f157315 438 return 0;
47d0b4ff
LT
439}
440
c6127fa3
SS
441static struct cmd_struct commands[] = {
442 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
783d7e86 443 { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
e9547947 444 { "annotate", cmd_annotate, RUN_SETUP | NO_PARSEOPT },
c6127fa3 445 { "apply", cmd_apply, RUN_SETUP_GENTLY },
eb0224c6 446 { "archive", cmd_archive, RUN_SETUP_GENTLY },
c6127fa3
SS
447 { "bisect--helper", cmd_bisect__helper, RUN_SETUP },
448 { "blame", cmd_blame, RUN_SETUP },
d74b541e 449 { "branch", cmd_branch, RUN_SETUP | DELAY_PAGER_CONFIG },
e9547947 450 { "bundle", cmd_bundle, RUN_SETUP_GENTLY | NO_PARSEOPT },
c6127fa3
SS
451 { "cat-file", cmd_cat_file, RUN_SETUP },
452 { "check-attr", cmd_check_attr, RUN_SETUP },
453 { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
454 { "check-mailmap", cmd_check_mailmap, RUN_SETUP },
e9547947 455 { "check-ref-format", cmd_check_ref_format, NO_PARSEOPT },
0ca560cb 456 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
c6127fa3
SS
457 { "checkout-index", cmd_checkout_index,
458 RUN_SETUP | NEED_WORK_TREE},
459 { "cherry", cmd_cherry, RUN_SETUP },
460 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
461 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
86d26f24 462 { "clone", cmd_clone },
c6127fa3
SS
463 { "column", cmd_column, RUN_SETUP_GENTLY },
464 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
4ce58ee3 465 { "commit-graph", cmd_commit_graph, RUN_SETUP },
e9547947 466 { "commit-tree", cmd_commit_tree, RUN_SETUP | NO_PARSEOPT },
32888b8f 467 { "config", cmd_config, RUN_SETUP_GENTLY | DELAY_PAGER_CONFIG },
c6127fa3 468 { "count-objects", cmd_count_objects, RUN_SETUP },
e9547947 469 { "credential", cmd_credential, RUN_SETUP_GENTLY | NO_PARSEOPT },
c6127fa3 470 { "describe", cmd_describe, RUN_SETUP },
e9547947
NTND
471 { "diff", cmd_diff, NO_PARSEOPT },
472 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
473 { "diff-index", cmd_diff_index, RUN_SETUP | NO_PARSEOPT },
474 { "diff-tree", cmd_diff_tree, RUN_SETUP | NO_PARSEOPT },
019678d6 475 { "difftool", cmd_difftool, RUN_SETUP | NEED_WORK_TREE },
c6127fa3
SS
476 { "fast-export", cmd_fast_export, RUN_SETUP },
477 { "fetch", cmd_fetch, RUN_SETUP },
e9547947 478 { "fetch-pack", cmd_fetch_pack, RUN_SETUP | NO_PARSEOPT },
c6127fa3
SS
479 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
480 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
481 { "format-patch", cmd_format_patch, RUN_SETUP },
482 { "fsck", cmd_fsck, RUN_SETUP },
483 { "fsck-objects", cmd_fsck, RUN_SETUP },
484 { "gc", cmd_gc, RUN_SETUP },
e9547947 485 { "get-tar-commit-id", cmd_get_tar_commit_id, NO_PARSEOPT },
f9ee2fcd 486 { "grep", cmd_grep, RUN_SETUP_GENTLY },
c6127fa3
SS
487 { "hash-object", cmd_hash_object },
488 { "help", cmd_help },
e9547947 489 { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY | NO_PARSEOPT },
86d26f24
NTND
490 { "init", cmd_init_db },
491 { "init-db", cmd_init_db },
cbd9fc23 492 { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
c6127fa3 493 { "log", cmd_log, RUN_SETUP },
188dce13 494 { "ls-files", cmd_ls_files, RUN_SETUP },
c6127fa3
SS
495 { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
496 { "ls-tree", cmd_ls_tree, RUN_SETUP },
e9547947
NTND
497 { "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY | NO_PARSEOPT },
498 { "mailsplit", cmd_mailsplit, NO_PARSEOPT },
c6127fa3
SS
499 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
500 { "merge-base", cmd_merge_base, RUN_SETUP },
501 { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
e9547947
NTND
502 { "merge-index", cmd_merge_index, RUN_SETUP | NO_PARSEOPT },
503 { "merge-ours", cmd_merge_ours, RUN_SETUP | NO_PARSEOPT },
504 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
505 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
506 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
507 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
508 { "merge-tree", cmd_merge_tree, RUN_SETUP | NO_PARSEOPT },
509 { "mktag", cmd_mktag, RUN_SETUP | NO_PARSEOPT },
c6127fa3 510 { "mktree", cmd_mktree, RUN_SETUP },
6a257f03 511 { "multi-pack-index", cmd_multi_pack_index, RUN_SETUP_GENTLY },
c6127fa3
SS
512 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
513 { "name-rev", cmd_name_rev, RUN_SETUP },
514 { "notes", cmd_notes, RUN_SETUP },
515 { "pack-objects", cmd_pack_objects, RUN_SETUP },
e9547947 516 { "pack-redundant", cmd_pack_redundant, RUN_SETUP | NO_PARSEOPT },
c6127fa3 517 { "pack-refs", cmd_pack_refs, RUN_SETUP },
e9547947 518 { "patch-id", cmd_patch_id, RUN_SETUP_GENTLY | NO_PARSEOPT },
c6127fa3
SS
519 { "pickaxe", cmd_blame, RUN_SETUP },
520 { "prune", cmd_prune, RUN_SETUP },
521 { "prune-packed", cmd_prune_packed, RUN_SETUP },
1e1ea69f 522 { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
c6127fa3 523 { "push", cmd_push, RUN_SETUP },
348ae56c 524 { "range-diff", cmd_range_diff, RUN_SETUP | USE_PAGER },
3d415425 525 { "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX},
4557f1ad 526 { "rebase--helper", cmd_rebase__helper, RUN_SETUP | NEED_WORK_TREE },
c6127fa3
SS
527 { "receive-pack", cmd_receive_pack },
528 { "reflog", cmd_reflog, RUN_SETUP },
529 { "remote", cmd_remote, RUN_SETUP },
e9547947
NTND
530 { "remote-ext", cmd_remote_ext, NO_PARSEOPT },
531 { "remote-fd", cmd_remote_fd, NO_PARSEOPT },
c6127fa3
SS
532 { "repack", cmd_repack, RUN_SETUP },
533 { "replace", cmd_replace, RUN_SETUP },
534 { "rerere", cmd_rerere, RUN_SETUP },
535 { "reset", cmd_reset, RUN_SETUP },
e9547947
NTND
536 { "rev-list", cmd_rev_list, RUN_SETUP | NO_PARSEOPT },
537 { "rev-parse", cmd_rev_parse, NO_PARSEOPT },
c6127fa3
SS
538 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
539 { "rm", cmd_rm, RUN_SETUP },
540 { "send-pack", cmd_send_pack, RUN_SETUP },
ed10cb95 541 { "serve", cmd_serve, RUN_SETUP },
c6127fa3
SS
542 { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
543 { "show", cmd_show, RUN_SETUP },
544 { "show-branch", cmd_show_branch, RUN_SETUP },
ff417260 545 { "show-index", cmd_show_index },
c6127fa3
SS
546 { "show-ref", cmd_show_ref, RUN_SETUP },
547 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
548 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
549 { "stripspace", cmd_stripspace },
e9547947 550 { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX | NO_PARSEOPT },
c6127fa3 551 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
de121ffe 552 { "tag", cmd_tag, RUN_SETUP | DELAY_PAGER_CONFIG },
e9547947
NTND
553 { "unpack-file", cmd_unpack_file, RUN_SETUP | NO_PARSEOPT },
554 { "unpack-objects", cmd_unpack_objects, RUN_SETUP | NO_PARSEOPT },
c6127fa3
SS
555 { "update-index", cmd_update_index, RUN_SETUP },
556 { "update-ref", cmd_update_ref, RUN_SETUP },
557 { "update-server-info", cmd_update_server_info, RUN_SETUP },
e9547947
NTND
558 { "upload-archive", cmd_upload_archive, NO_PARSEOPT },
559 { "upload-archive--writer", cmd_upload_archive_writer, NO_PARSEOPT },
a3d6b53e 560 { "upload-pack", cmd_upload_pack },
e9547947 561 { "var", cmd_var, RUN_SETUP_GENTLY | NO_PARSEOPT },
d07b00b7 562 { "verify-commit", cmd_verify_commit, RUN_SETUP },
c6127fa3
SS
563 { "verify-pack", cmd_verify_pack },
564 { "verify-tag", cmd_verify_tag, RUN_SETUP },
565 { "version", cmd_version },
566 { "whatchanged", cmd_whatchanged, RUN_SETUP },
e9547947 567 { "worktree", cmd_worktree, RUN_SETUP | NO_PARSEOPT },
c6127fa3
SS
568 { "write-tree", cmd_write_tree, RUN_SETUP },
569};
570
c4f901d1 571static struct cmd_struct *get_builtin(const char *s)
c6127fa3
SS
572{
573 int i;
574 for (i = 0; i < ARRAY_SIZE(commands); i++) {
c4f901d1 575 struct cmd_struct *p = commands + i;
c6127fa3 576 if (!strcmp(s, p->cmd))
c4f901d1 577 return p;
c6127fa3 578 }
c4f901d1
SV
579 return NULL;
580}
581
582int is_builtin(const char *s)
583{
584 return !!get_builtin(s);
c6127fa3
SS
585}
586
e5d7a619 587static void list_builtins(struct string_list *out, unsigned int exclude_option)
8893fd95
JK
588{
589 int i;
e9547947
NTND
590 for (i = 0; i < ARRAY_SIZE(commands); i++) {
591 if (exclude_option &&
592 (commands[i].option & exclude_option))
593 continue;
e5d7a619 594 string_list_append(out, commands[i].cmd);
e9547947 595 }
8893fd95
JK
596}
597
63ca1c09
AK
598#ifdef STRIP_EXTENSION
599static void strip_extension(const char **argv)
600{
601 size_t len;
602
603 if (strip_suffix(argv[0], STRIP_EXTENSION, &len))
604 argv[0] = xmemdupz(argv[0], len);
605}
606#else
607#define strip_extension(cmd)
608#endif
609
3f784a4d 610static void handle_builtin(int argc, const char **argv)
231af832 611{
2c6b6d9f 612 struct argv_array args = ARGV_ARRAY_INIT;
63ca1c09 613 const char *cmd;
c4f901d1 614 struct cmd_struct *builtin;
23326d14 615
63ca1c09
AK
616 strip_extension(argv);
617 cmd = argv[0];
231af832 618
2c6b6d9f 619 /* Turn "git cmd --help" into "git help --exclude-guides cmd" */
1cd95087 620 if (argc > 1 && !strcmp(argv[1], "--help")) {
2c6b6d9f
RT
621 int i;
622
1cd95087
LT
623 argv[1] = argv[0];
624 argv[0] = cmd = "help";
2c6b6d9f
RT
625
626 for (i = 0; i < argc; i++) {
627 argv_array_push(&args, argv[i]);
628 if (!i)
629 argv_array_push(&args, "--exclude-guides");
630 }
631
632 argc++;
633 argv = args.argv;
1cd95087
LT
634 }
635
c4f901d1 636 builtin = get_builtin(cmd);
441981bc
JH
637 if (builtin)
638 exit(run_builtin(builtin, argc, argv));
2c6b6d9f 639 argv_array_clear(&args);
231af832
LT
640}
641
7550be0a
JH
642static void execv_dashed_external(const char **argv)
643{
2b296c93 644 struct child_process cmd = CHILD_PROCESS_INIT;
d8e96fd8 645 int status;
7550be0a 646
74866d75
BW
647 if (get_super_prefix())
648 die("%s doesn't support --super-prefix", argv[0]);
649
595d59e2 650 if (use_pager == -1 && !is_builtin(argv[0]))
92058e4d 651 use_pager = check_pager_config(argv[0]);
030149a4
JN
652 commit_pager_choice();
653
2b296c93
JK
654 argv_array_pushf(&cmd.args, "git-%s", argv[0]);
655 argv_array_pushv(&cmd.args, argv + 1);
656 cmd.clean_on_exit = 1;
46df6906 657 cmd.wait_after_clean = 1;
2b296c93 658 cmd.silent_exec_failure = 1;
7550be0a 659
2b296c93 660 trace_argv_printf(cmd.args.argv, "trace: exec:");
7550be0a 661
d8e96fd8 662 /*
246f0ede
JK
663 * If we fail because the command is not found, it is
664 * OK to return. Otherwise, we just pass along the status code,
665 * or our usual generic code if we were not even able to exec
666 * the program.
d8e96fd8 667 */
2b296c93 668 status = run_command(&cmd);
246f0ede 669 if (status >= 0)
5709e036 670 exit(status);
246f0ede
JK
671 else if (errno != ENOENT)
672 exit(128);
7550be0a
JH
673}
674
a907e1b6
AS
675static int run_argv(int *argcp, const char ***argv)
676{
677 int done_alias = 0;
c6d75bc1 678 struct string_list cmd_list = STRING_LIST_INIT_NODUP;
82f71d9a 679 struct string_list_item *seen;
a907e1b6
AS
680
681 while (1) {
441981bc
JH
682 /*
683 * If we tried alias and futzed with our environment,
684 * it no longer is safe to invoke builtins directly in
685 * general. We have to spawn them as dashed externals.
686 *
687 * NEEDSWORK: if we can figure out cases
688 * where it is safe to do, we can avoid spawning a new
689 * process.
690 */
691 if (!done_alias)
692 handle_builtin(*argcp, *argv);
a907e1b6
AS
693
694 /* .. then try the external ones */
695 execv_dashed_external(*argv);
696
82f71d9a
TS
697 seen = unsorted_string_list_lookup(&cmd_list, *argv[0]);
698 if (seen) {
699 int i;
700 struct strbuf sb = STRBUF_INIT;
701 for (i = 0; i < cmd_list.nr; i++) {
702 struct string_list_item *item = &cmd_list.items[i];
703
704 strbuf_addf(&sb, "\n %s", item->string);
705 if (item == seen)
706 strbuf_addstr(&sb, " <==");
707 else if (i == cmd_list.nr - 1)
708 strbuf_addstr(&sb, " ==>");
709 }
c6d75bc1 710 die(_("alias loop detected: expansion of '%s' does"
82f71d9a 711 " not terminate:%s"), cmd_list.items[0].string, sb.buf);
c6d75bc1
TS
712 }
713
714 string_list_append(&cmd_list, *argv[0]);
715
716 /*
717 * It could be an alias -- this works around the insanity
a907e1b6
AS
718 * of overriding "git log" with "git show" by having
719 * alias.log = show
720 */
c0562611 721 if (!handle_alias(argcp, argv))
a907e1b6
AS
722 break;
723 done_alias = 1;
724 }
725
c6d75bc1
TS
726 string_list_clear(&cmd_list, 0);
727
a907e1b6
AS
728 return done_alias;
729}
730
3f2e2297 731int cmd_main(int argc, const char **argv)
8e49d503 732{
4dd47c3b 733 const char *cmd;
8fa7975b 734 int done_help = 0;
231af832 735
650c4492 736 cmd = argv[0];
2cd72b0b 737 if (!cmd)
4dd47c3b 738 cmd = "git-help";
6854a8f5
JK
739 else {
740 const char *slash = find_last_dir_sep(cmd);
741 if (slash)
742 cmd = slash + 1;
743 }
8e49d503 744
578da039
KB
745 trace_command_performance(argv);
746
231af832
LT
747 /*
748 * "git-xxxx" is the same as "git xxxx", but we obviously:
749 *
750 * - cannot take flags in between the "git" and the "xxxx".
751 * - cannot execute it externally (since it would just do
752 * the same thing over again)
753 *
3f784a4d
SS
754 * So we just directly call the builtin handler, and die if
755 * that one cannot handle it.
231af832 756 */
ae021d87 757 if (skip_prefix(cmd, "git-", &cmd)) {
231af832 758 argv[0] = cmd;
3f784a4d
SS
759 handle_builtin(argc, argv);
760 die("cannot handle %s as a builtin", cmd);
231af832 761 }
8e49d503 762
231af832 763 /* Look for flags.. */
6acbcb92
JS
764 argv++;
765 argc--;
4394efec 766 handle_options(&argv, &argc, NULL);
6acbcb92 767 if (argc > 0) {
6d877803
JK
768 /* translate --help and --version into commands */
769 skip_prefix(argv[0], "--", &argv[0]);
6acbcb92 770 } else {
3d7e2d85 771 /* The user didn't specify a command; give them help */
73e25e7c 772 commit_pager_choice();
3d7e2d85
SP
773 printf("usage: %s\n\n", git_usage_string);
774 list_common_cmds_help();
421a9769 775 printf("\n%s\n", _(git_more_info_string));
3d7e2d85 776 exit(1);
97fc6c5f 777 }
6acbcb92 778 cmd = argv[0];
231af832
LT
779
780 /*
511707d4 781 * We use PATH to find git commands, but we prepend some higher
3ea3c215 782 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
511707d4
SP
783 * environment, and the $(gitexecdir) from the Makefile at build
784 * time.
231af832 785 */
e1464ca7 786 setup_path();
8e49d503 787
a025463b 788 while (1) {
8fa7975b 789 int was_alias = run_argv(&argc, &argv);
a907e1b6 790 if (errno != ENOENT)
a025463b 791 break;
a907e1b6 792 if (was_alias) {
fc045fe7
AS
793 fprintf(stderr, _("expansion of alias '%s' failed; "
794 "'%s' is not a git command\n"),
f3dd015c
TT
795 cmd, argv[0]);
796 exit(1);
797 }
a907e1b6
AS
798 if (!done_help) {
799 cmd = argv[0] = help_unknown_cmd(cmd);
800 done_help = 1;
801 } else
802 break;
f3dd015c 803 }
10b15b86 804
fc045fe7 805 fprintf(stderr, _("failed to run command '%s': %s\n"),
33ebb871 806 cmd, strerror(errno));
8e49d503
AE
807
808 return 1;
809}