Merge branch 'jh/trace2-pretty-output'
[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 35 "concept guides. See 'git help <command>' or 'git help <concept>'\n"
e55f36b8
PO
36 "to read about a specific subcommand or concept.\n"
37 "See 'git help git' for an overview of the system.");
b7d96819 38
4e10738a 39static int use_pager = -1;
c0562611 40
e5d7a619 41static void list_builtins(struct string_list *list, unsigned int exclude_option);
8893fd95 42
e11dca10
NTND
43static void exclude_helpers_from_list(struct string_list *list)
44{
45 int i = 0;
46
47 while (i < list->nr) {
48 if (strstr(list->items[i].string, "--"))
49 unsorted_string_list_delete_item(list, i, 0);
50 else
51 i++;
52 }
53}
54
0089521c
NTND
55static int match_token(const char *spec, int len, const char *token)
56{
57 int token_len = strlen(token);
58
59 return len == token_len && !strncmp(spec, token, token_len);
60}
61
62static int list_cmds(const char *spec)
63{
e5d7a619
NTND
64 struct string_list list = STRING_LIST_INIT_DUP;
65 int i;
83b0ecf3
JK
66 int nongit;
67
68 /*
69 * Set up the repository so we can pick up any repo-level config (like
70 * completion.commands).
71 */
72 setup_git_directory_gently(&nongit);
e5d7a619 73
0089521c
NTND
74 while (*spec) {
75 const char *sep = strchrnul(spec, ',');
76 int len = sep - spec;
77
78 if (match_token(spec, len, "builtins"))
e5d7a619 79 list_builtins(&list, 0);
6bb2dc0b
NTND
80 else if (match_token(spec, len, "main"))
81 list_all_main_cmds(&list);
82 else if (match_token(spec, len, "others"))
83 list_all_other_cmds(&list);
e11dca10
NTND
84 else if (match_token(spec, len, "nohelpers"))
85 exclude_helpers_from_list(&list);
3301d36b
NTND
86 else if (match_token(spec, len, "alias"))
87 list_aliases(&list);
6532f374
NTND
88 else if (match_token(spec, len, "config"))
89 list_cmds_by_config(&list);
3c777767
NTND
90 else if (len > 5 && !strncmp(spec, "list-", 5)) {
91 struct strbuf sb = STRBUF_INIT;
92
93 strbuf_add(&sb, spec + 5, len - 5);
94 list_cmds_by_category(&list, sb.buf);
95 strbuf_release(&sb);
96 }
0089521c
NTND
97 else
98 die(_("unsupported command listing type '%s'"), spec);
99 spec += len;
100 if (*spec == ',')
101 spec++;
102 }
e5d7a619
NTND
103 for (i = 0; i < list.nr; i++)
104 puts(list.items[i].string);
105 string_list_clear(&list, 0);
0089521c
NTND
106 return 0;
107}
8893fd95 108
3b335762
NTND
109static void commit_pager_choice(void)
110{
4e10738a
JK
111 switch (use_pager) {
112 case 0:
113 setenv("GIT_PAGER", "cat", 1);
114 break;
115 case 1:
116 setup_pager();
117 break;
118 default:
119 break;
120 }
121}
122
033fe3d9
123void setup_auto_pager(const char *cmd, int def)
124{
125 if (use_pager != -1 || pager_in_use())
126 return;
127 use_pager = check_pager_config(cmd);
128 if (use_pager == -1)
129 use_pager = def;
130 commit_pager_choice();
131}
132
4b25d091 133static int handle_options(const char ***argv, int *argc, int *envchanged)
4ab243a9 134{
73546c08 135 const char **orig_argv = *argv;
4ab243a9
JS
136
137 while (*argc > 0) {
138 const char *cmd = (*argv)[0];
139 if (cmd[0] != '-')
140 break;
141
6acbcb92
JS
142 /*
143 * For legacy reasons, the "version" and "help"
144 * commands can be written with "--" prepended
145 * to make them look like flags.
146 */
147 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
148 break;
149
150 /*
151 * Check remaining flags.
152 */
ae021d87 153 if (skip_prefix(cmd, "--exec-path", &cmd)) {
6acbcb92 154 if (*cmd == '=')
226c0ddd 155 git_set_exec_path(cmd + 1);
6acbcb92
JS
156 else {
157 puts(git_exec_path());
ee4512ed 158 trace2_cmd_name("_query_");
6acbcb92
JS
159 exit(0);
160 }
89a56bfb
MH
161 } else if (!strcmp(cmd, "--html-path")) {
162 puts(system_path(GIT_HTML_PATH));
ee4512ed 163 trace2_cmd_name("_query_");
89a56bfb 164 exit(0);
f2dd8c37
JS
165 } else if (!strcmp(cmd, "--man-path")) {
166 puts(system_path(GIT_MAN_PATH));
ee4512ed 167 trace2_cmd_name("_query_");
f2dd8c37
JS
168 exit(0);
169 } else if (!strcmp(cmd, "--info-path")) {
170 puts(system_path(GIT_INFO_PATH));
ee4512ed 171 trace2_cmd_name("_query_");
f2dd8c37 172 exit(0);
6acbcb92 173 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
4e10738a 174 use_pager = 1;
7213c288 175 } else if (!strcmp(cmd, "-P") || !strcmp(cmd, "--no-pager")) {
4e10738a 176 use_pager = 0;
463a849d
MM
177 if (envchanged)
178 *envchanged = 1;
b0fa7ab5 179 } else if (!strcmp(cmd, "--no-replace-objects")) {
6ebd1caf 180 read_replace_refs = 0;
6476b38b
CC
181 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
182 if (envchanged)
183 *envchanged = 1;
6acbcb92 184 } else if (!strcmp(cmd, "--git-dir")) {
c321f00d 185 if (*argc < 2) {
fc045fe7 186 fprintf(stderr, _("no directory given for --git-dir\n" ));
c321f00d
BG
187 usage(git_usage_string);
188 }
45b09794 189 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
190 if (envchanged)
191 *envchanged = 1;
6acbcb92
JS
192 (*argv)++;
193 (*argc)--;
ae021d87
JK
194 } else if (skip_prefix(cmd, "--git-dir=", &cmd)) {
195 setenv(GIT_DIR_ENVIRONMENT, cmd, 1);
4394efec
ML
196 if (envchanged)
197 *envchanged = 1;
a1bea2c1
JT
198 } else if (!strcmp(cmd, "--namespace")) {
199 if (*argc < 2) {
fc045fe7 200 fprintf(stderr, _("no namespace given for --namespace\n" ));
a1bea2c1
JT
201 usage(git_usage_string);
202 }
203 setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
204 if (envchanged)
205 *envchanged = 1;
206 (*argv)++;
207 (*argc)--;
ae021d87
JK
208 } else if (skip_prefix(cmd, "--namespace=", &cmd)) {
209 setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1);
a1bea2c1
JT
210 if (envchanged)
211 *envchanged = 1;
892c41b9
ML
212 } else if (!strcmp(cmd, "--work-tree")) {
213 if (*argc < 2) {
fc045fe7 214 fprintf(stderr, _("no directory given for --work-tree\n" ));
892c41b9
ML
215 usage(git_usage_string);
216 }
217 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
218 if (envchanged)
219 *envchanged = 1;
892c41b9
ML
220 (*argv)++;
221 (*argc)--;
ae021d87
JK
222 } else if (skip_prefix(cmd, "--work-tree=", &cmd)) {
223 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1);
4394efec
ML
224 if (envchanged)
225 *envchanged = 1;
74866d75
BW
226 } else if (!strcmp(cmd, "--super-prefix")) {
227 if (*argc < 2) {
fc045fe7 228 fprintf(stderr, _("no prefix given for --super-prefix\n" ));
74866d75
BW
229 usage(git_usage_string);
230 }
231 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, (*argv)[1], 1);
232 if (envchanged)
233 *envchanged = 1;
234 (*argv)++;
235 (*argc)--;
236 } else if (skip_prefix(cmd, "--super-prefix=", &cmd)) {
237 setenv(GIT_SUPER_PREFIX_ENVIRONMENT, cmd, 1);
238 if (envchanged)
239 *envchanged = 1;
6acbcb92 240 } else if (!strcmp(cmd, "--bare")) {
4d3ab44d 241 char *cwd = xgetcwd();
6adcca3f 242 is_bare_repository_cfg = 1;
4d3ab44d
RS
243 setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
244 free(cwd);
2cd83d10 245 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
4394efec
ML
246 if (envchanged)
247 *envchanged = 1;
8b1fa778
AR
248 } else if (!strcmp(cmd, "-c")) {
249 if (*argc < 2) {
fc045fe7 250 fprintf(stderr, _("-c expects a configuration string\n" ));
8b1fa778
AR
251 usage(git_usage_string);
252 }
2b64fc89 253 git_config_push_parameter((*argv)[1]);
8b1fa778
AR
254 (*argv)++;
255 (*argc)--;
823ab40f
JK
256 } else if (!strcmp(cmd, "--literal-pathspecs")) {
257 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
258 if (envchanged)
259 *envchanged = 1;
260 } else if (!strcmp(cmd, "--no-literal-pathspecs")) {
261 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
262 if (envchanged)
263 *envchanged = 1;
bd30c2e4
NTND
264 } else if (!strcmp(cmd, "--glob-pathspecs")) {
265 setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1);
266 if (envchanged)
267 *envchanged = 1;
268 } else if (!strcmp(cmd, "--noglob-pathspecs")) {
269 setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1);
270 if (envchanged)
271 *envchanged = 1;
93d93537
NTND
272 } else if (!strcmp(cmd, "--icase-pathspecs")) {
273 setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
274 if (envchanged)
275 *envchanged = 1;
27344d6a
JK
276 } else if (!strcmp(cmd, "--no-optional-locks")) {
277 setenv(GIT_OPTIONAL_LOCKS_ENVIRONMENT, "0", 1);
278 if (envchanged)
279 *envchanged = 1;
6035d6aa
NTND
280 } else if (!strcmp(cmd, "--shallow-file")) {
281 (*argv)++;
282 (*argc)--;
6a2df51c 283 set_alternate_shallow_file(the_repository, (*argv)[0], 1);
6035d6aa
NTND
284 if (envchanged)
285 *envchanged = 1;
44e1e4d6
NR
286 } else if (!strcmp(cmd, "-C")) {
287 if (*argc < 2) {
fc045fe7 288 fprintf(stderr, _("no directory given for -C\n" ));
44e1e4d6
NR
289 usage(git_usage_string);
290 }
6a536e20
KN
291 if ((*argv)[1][0]) {
292 if (chdir((*argv)[1]))
fc045fe7 293 die_errno("cannot change to '%s'", (*argv)[1]);
6a536e20
KN
294 if (envchanged)
295 *envchanged = 1;
296 }
44e1e4d6
NR
297 (*argv)++;
298 (*argc)--;
0089521c 299 } else if (skip_prefix(cmd, "--list-cmds=", &cmd)) {
ee4512ed 300 trace2_cmd_name("_query_");
0089521c 301 if (!strcmp(cmd, "parseopt")) {
e5d7a619
NTND
302 struct string_list list = STRING_LIST_INIT_DUP;
303 int i;
304
305 list_builtins(&list, NO_PARSEOPT);
306 for (i = 0; i < list.nr; i++)
307 printf("%s ", list.items[i].string);
308 string_list_clear(&list, 0);
0089521c
NTND
309 exit(0);
310 } else {
311 exit(list_cmds(cmd));
312 }
6acbcb92 313 } else {
fc045fe7 314 fprintf(stderr, _("unknown option: %s\n"), cmd);
822a7d50 315 usage(git_usage_string);
6acbcb92 316 }
4ab243a9
JS
317
318 (*argv)++;
319 (*argc)--;
4ab243a9 320 }
73546c08 321 return (*argv) - orig_argv;
4ab243a9
JS
322}
323
2b11e317
JS
324static int handle_alias(int *argcp, const char ***argv)
325{
af05d679 326 int envchanged = 0, ret = 0, saved_errno = errno;
0347a8c7 327 int count, option_count;
4b25d091 328 const char **new_argv;
94351118
JK
329 const char *alias_command;
330 char *alias_string;
0347a8c7
ML
331
332 alias_command = (*argv)[0];
94351118 333 alias_string = alias_lookup(alias_command);
0347a8c7 334 if (alias_string) {
a9a60b94
RV
335 if (*argcp > 1 && !strcmp((*argv)[1], "-h"))
336 fprintf_ln(stderr, _("'%s' is aliased to '%s'"),
337 alias_command, alias_string);
dfd42a3c 338 if (alias_string[0] == '!') {
850d2fec 339 struct child_process child = CHILD_PROCESS_INIT;
a9bcf658
JS
340 int nongit_ok;
341
342 /* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
343 setup_git_directory_gently(&nongit_ok);
7f51f8bc 344
030149a4 345 commit_pager_choice();
7f51f8bc 346
850d2fec 347 child.use_shell = 1;
ee4512ed 348 child.trace2_child_class = "shell_alias";
850d2fec
JK
349 argv_array_push(&child.args, alias_string + 1);
350 argv_array_pushv(&child.args, (*argv) + 1);
7f51f8bc 351
ee4512ed
JH
352 trace2_cmd_alias(alias_command, child.args.argv);
353 trace2_cmd_list_config();
354 trace2_cmd_name("_run_shell_alias_");
355
850d2fec 356 ret = run_command(&child);
7f51f8bc
EFL
357 if (ret >= 0) /* normal exit */
358 exit(ret);
359
8aa8c140
NTND
360 die_errno(_("while expanding alias '%s': '%s'"),
361 alias_command, alias_string + 1);
dfd42a3c 362 }
0347a8c7 363 count = split_cmdline(alias_string, &new_argv);
dc4179f9 364 if (count < 0)
8aa8c140 365 die(_("bad alias.%s string: %s"), alias_command,
a7412ae1 366 _(split_cmdline_strerror(count)));
4394efec
ML
367 option_count = handle_options(&new_argv, &count, &envchanged);
368 if (envchanged)
8aa8c140
NTND
369 die(_("alias '%s' changes environment variables.\n"
370 "You can use '!git' in the alias to do this"),
371 alias_command);
0347a8c7
ML
372 memmove(new_argv - option_count, new_argv,
373 count * sizeof(char *));
374 new_argv -= option_count;
375
376 if (count < 1)
8aa8c140 377 die(_("empty alias for %s"), alias_command);
0347a8c7
ML
378
379 if (!strcmp(alias_command, new_argv[0]))
8aa8c140 380 die(_("recursive alias: %s"), alias_command);
0347a8c7 381
b319ce4c 382 trace_argv_printf(new_argv,
6ce4e61f
CC
383 "trace: alias expansion: %s =>",
384 alias_command);
575ba9d6 385
2756ca43 386 REALLOC_ARRAY(new_argv, count + *argcp);
0347a8c7 387 /* insert after command name */
4b25d091 388 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
2b11e317 389
ee4512ed
JH
390 trace2_cmd_alias(alias_command, new_argv);
391 trace2_cmd_list_config();
392
0347a8c7
ML
393 *argv = new_argv;
394 *argcp += count - 1;
2b11e317 395
0347a8c7 396 ret = 1;
2b11e317
JS
397 }
398
47e5c0ca
JS
399 errno = saved_errno;
400
2b11e317
JS
401 return ret;
402}
403
f172f334 404static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
47d0b4ff 405{
99caeed0 406 int status, help;
0f157315 407 struct stat st;
47d0b4ff
LT
408 const char *prefix;
409
410 prefix = NULL;
99caeed0
JN
411 help = argc == 2 && !strcmp(argv[1], "-h");
412 if (!help) {
413 if (p->option & RUN_SETUP)
414 prefix = setup_git_directory();
27bd38d4 415 else if (p->option & RUN_SETUP_GENTLY) {
ee38dfb8
NTND
416 int nongit_ok;
417 prefix = setup_git_directory_gently(&nongit_ok);
418 }
99caeed0 419
c409824c
420 if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY) &&
421 !(p->option & DELAY_PAGER_CONFIG))
99caeed0
JN
422 use_pager = check_pager_config(p->cmd);
423 if (use_pager == -1 && p->option & USE_PAGER)
424 use_pager = 1;
a9ca8a85
NTND
425
426 if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
427 startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
428 trace_repo_setup(prefix);
99caeed0 429 }
4e10738a
JK
430 commit_pager_choice();
431
74866d75
BW
432 if (!help && get_super_prefix()) {
433 if (!(p->option & SUPPORT_SUPER_PREFIX))
8aa8c140 434 die(_("%s doesn't support --super-prefix"), p->cmd);
74866d75
BW
435 }
436
99caeed0 437 if (!help && p->option & NEED_WORK_TREE)
59f0f2f3
MH
438 setup_work_tree();
439
b319ce4c 440 trace_argv_printf(argv, "trace: built-in: git");
ee4512ed
JH
441 trace2_cmd_name(p->cmd);
442 trace2_cmd_list_config();
47d0b4ff 443
f8adbec9 444 validate_cache_entries(the_repository->index);
0f157315 445 status = p->fn(argc, argv, prefix);
f8adbec9 446 validate_cache_entries(the_repository->index);
8616a2d0 447
0f157315 448 if (status)
47e3de0e 449 return status;
0f157315
LT
450
451 /* Somebody closed stdout? */
452 if (fstat(fileno(stdout), &st))
453 return 0;
454 /* Ignore write errors for pipes and sockets.. */
455 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
456 return 0;
457
458 /* Check for ENOSPC and EIO errors.. */
0227f988 459 if (fflush(stdout))
8aa8c140 460 die_errno(_("write failure on standard output"));
0227f988 461 if (ferror(stdout))
8aa8c140 462 die(_("unknown write failure on standard output"));
0227f988 463 if (fclose(stdout))
8aa8c140 464 die_errno(_("close failed on standard output"));
0f157315 465 return 0;
47d0b4ff
LT
466}
467
c6127fa3
SS
468static struct cmd_struct commands[] = {
469 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
783d7e86 470 { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE },
e9547947 471 { "annotate", cmd_annotate, RUN_SETUP | NO_PARSEOPT },
c6127fa3 472 { "apply", cmd_apply, RUN_SETUP_GENTLY },
eb0224c6 473 { "archive", cmd_archive, RUN_SETUP_GENTLY },
c6127fa3
SS
474 { "bisect--helper", cmd_bisect__helper, RUN_SETUP },
475 { "blame", cmd_blame, RUN_SETUP },
d74b541e 476 { "branch", cmd_branch, RUN_SETUP | DELAY_PAGER_CONFIG },
e9547947 477 { "bundle", cmd_bundle, RUN_SETUP_GENTLY | NO_PARSEOPT },
c6127fa3
SS
478 { "cat-file", cmd_cat_file, RUN_SETUP },
479 { "check-attr", cmd_check_attr, RUN_SETUP },
480 { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
481 { "check-mailmap", cmd_check_mailmap, RUN_SETUP },
e9547947 482 { "check-ref-format", cmd_check_ref_format, NO_PARSEOPT },
0ca560cb 483 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
c6127fa3
SS
484 { "checkout-index", cmd_checkout_index,
485 RUN_SETUP | NEED_WORK_TREE},
486 { "cherry", cmd_cherry, RUN_SETUP },
487 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
488 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
86d26f24 489 { "clone", cmd_clone },
c6127fa3
SS
490 { "column", cmd_column, RUN_SETUP_GENTLY },
491 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
4ce58ee3 492 { "commit-graph", cmd_commit_graph, RUN_SETUP },
e9547947 493 { "commit-tree", cmd_commit_tree, RUN_SETUP | NO_PARSEOPT },
32888b8f 494 { "config", cmd_config, RUN_SETUP_GENTLY | DELAY_PAGER_CONFIG },
c6127fa3 495 { "count-objects", cmd_count_objects, RUN_SETUP },
e9547947 496 { "credential", cmd_credential, RUN_SETUP_GENTLY | NO_PARSEOPT },
c6127fa3 497 { "describe", cmd_describe, RUN_SETUP },
e9547947
NTND
498 { "diff", cmd_diff, NO_PARSEOPT },
499 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
500 { "diff-index", cmd_diff_index, RUN_SETUP | NO_PARSEOPT },
501 { "diff-tree", cmd_diff_tree, RUN_SETUP | NO_PARSEOPT },
20de316e 502 { "difftool", cmd_difftool, RUN_SETUP_GENTLY },
b4f207f3 503 { "env--helper", cmd_env__helper },
c6127fa3
SS
504 { "fast-export", cmd_fast_export, RUN_SETUP },
505 { "fetch", cmd_fetch, RUN_SETUP },
e9547947 506 { "fetch-pack", cmd_fetch_pack, RUN_SETUP | NO_PARSEOPT },
c6127fa3
SS
507 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
508 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
509 { "format-patch", cmd_format_patch, RUN_SETUP },
510 { "fsck", cmd_fsck, RUN_SETUP },
511 { "fsck-objects", cmd_fsck, RUN_SETUP },
512 { "gc", cmd_gc, RUN_SETUP },
e9547947 513 { "get-tar-commit-id", cmd_get_tar_commit_id, NO_PARSEOPT },
f9ee2fcd 514 { "grep", cmd_grep, RUN_SETUP_GENTLY },
c6127fa3
SS
515 { "hash-object", cmd_hash_object },
516 { "help", cmd_help },
e9547947 517 { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY | NO_PARSEOPT },
86d26f24
NTND
518 { "init", cmd_init_db },
519 { "init-db", cmd_init_db },
cbd9fc23 520 { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
c6127fa3 521 { "log", cmd_log, RUN_SETUP },
188dce13 522 { "ls-files", cmd_ls_files, RUN_SETUP },
c6127fa3
SS
523 { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
524 { "ls-tree", cmd_ls_tree, RUN_SETUP },
e9547947
NTND
525 { "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY | NO_PARSEOPT },
526 { "mailsplit", cmd_mailsplit, NO_PARSEOPT },
c6127fa3
SS
527 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
528 { "merge-base", cmd_merge_base, RUN_SETUP },
529 { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
e9547947
NTND
530 { "merge-index", cmd_merge_index, RUN_SETUP | NO_PARSEOPT },
531 { "merge-ours", cmd_merge_ours, RUN_SETUP | NO_PARSEOPT },
532 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
533 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
534 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
535 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT },
536 { "merge-tree", cmd_merge_tree, RUN_SETUP | NO_PARSEOPT },
537 { "mktag", cmd_mktag, RUN_SETUP | NO_PARSEOPT },
c6127fa3 538 { "mktree", cmd_mktree, RUN_SETUP },
6a257f03 539 { "multi-pack-index", cmd_multi_pack_index, RUN_SETUP_GENTLY },
c6127fa3
SS
540 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
541 { "name-rev", cmd_name_rev, RUN_SETUP },
542 { "notes", cmd_notes, RUN_SETUP },
543 { "pack-objects", cmd_pack_objects, RUN_SETUP },
e9547947 544 { "pack-redundant", cmd_pack_redundant, RUN_SETUP | NO_PARSEOPT },
c6127fa3 545 { "pack-refs", cmd_pack_refs, RUN_SETUP },
e9547947 546 { "patch-id", cmd_patch_id, RUN_SETUP_GENTLY | NO_PARSEOPT },
c6127fa3
SS
547 { "pickaxe", cmd_blame, RUN_SETUP },
548 { "prune", cmd_prune, RUN_SETUP },
549 { "prune-packed", cmd_prune_packed, RUN_SETUP },
1e1ea69f 550 { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
c6127fa3 551 { "push", cmd_push, RUN_SETUP },
348ae56c 552 { "range-diff", cmd_range_diff, RUN_SETUP | USE_PAGER },
3d415425 553 { "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX},
80dfc924 554 { "rebase", cmd_rebase, RUN_SETUP | NEED_WORK_TREE },
cf808208 555 { "rebase--interactive", cmd_rebase__interactive, RUN_SETUP | NEED_WORK_TREE },
c6127fa3
SS
556 { "receive-pack", cmd_receive_pack },
557 { "reflog", cmd_reflog, RUN_SETUP },
558 { "remote", cmd_remote, RUN_SETUP },
e9547947
NTND
559 { "remote-ext", cmd_remote_ext, NO_PARSEOPT },
560 { "remote-fd", cmd_remote_fd, NO_PARSEOPT },
c6127fa3
SS
561 { "repack", cmd_repack, RUN_SETUP },
562 { "replace", cmd_replace, RUN_SETUP },
563 { "rerere", cmd_rerere, RUN_SETUP },
564 { "reset", cmd_reset, RUN_SETUP },
46e91b66 565 { "restore", cmd_restore, RUN_SETUP | NEED_WORK_TREE },
e9547947
NTND
566 { "rev-list", cmd_rev_list, RUN_SETUP | NO_PARSEOPT },
567 { "rev-parse", cmd_rev_parse, NO_PARSEOPT },
c6127fa3
SS
568 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
569 { "rm", cmd_rm, RUN_SETUP },
570 { "send-pack", cmd_send_pack, RUN_SETUP },
571 { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
572 { "show", cmd_show, RUN_SETUP },
573 { "show-branch", cmd_show_branch, RUN_SETUP },
ff417260 574 { "show-index", cmd_show_index },
c6127fa3
SS
575 { "show-ref", cmd_show_ref, RUN_SETUP },
576 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
90a46272
JS
577 /*
578 * NEEDSWORK: Until the builtin stash is thoroughly robust and no
579 * longer needs redirection to the stash shell script this is kept as
580 * is, then should be changed to RUN_SETUP | NEED_WORK_TREE
581 */
582 { "stash", cmd_stash },
c6127fa3
SS
583 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
584 { "stripspace", cmd_stripspace },
e9547947 585 { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX | NO_PARSEOPT },
d787d311 586 { "switch", cmd_switch, RUN_SETUP | NEED_WORK_TREE },
c6127fa3 587 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
de121ffe 588 { "tag", cmd_tag, RUN_SETUP | DELAY_PAGER_CONFIG },
e9547947
NTND
589 { "unpack-file", cmd_unpack_file, RUN_SETUP | NO_PARSEOPT },
590 { "unpack-objects", cmd_unpack_objects, RUN_SETUP | NO_PARSEOPT },
c6127fa3
SS
591 { "update-index", cmd_update_index, RUN_SETUP },
592 { "update-ref", cmd_update_ref, RUN_SETUP },
593 { "update-server-info", cmd_update_server_info, RUN_SETUP },
e9547947
NTND
594 { "upload-archive", cmd_upload_archive, NO_PARSEOPT },
595 { "upload-archive--writer", cmd_upload_archive_writer, NO_PARSEOPT },
a3d6b53e 596 { "upload-pack", cmd_upload_pack },
e9547947 597 { "var", cmd_var, RUN_SETUP_GENTLY | NO_PARSEOPT },
d07b00b7 598 { "verify-commit", cmd_verify_commit, RUN_SETUP },
c6127fa3
SS
599 { "verify-pack", cmd_verify_pack },
600 { "verify-tag", cmd_verify_tag, RUN_SETUP },
601 { "version", cmd_version },
602 { "whatchanged", cmd_whatchanged, RUN_SETUP },
e9547947 603 { "worktree", cmd_worktree, RUN_SETUP | NO_PARSEOPT },
c6127fa3
SS
604 { "write-tree", cmd_write_tree, RUN_SETUP },
605};
606
c4f901d1 607static struct cmd_struct *get_builtin(const char *s)
c6127fa3
SS
608{
609 int i;
610 for (i = 0; i < ARRAY_SIZE(commands); i++) {
c4f901d1 611 struct cmd_struct *p = commands + i;
c6127fa3 612 if (!strcmp(s, p->cmd))
c4f901d1 613 return p;
c6127fa3 614 }
c4f901d1
SV
615 return NULL;
616}
617
618int is_builtin(const char *s)
619{
620 return !!get_builtin(s);
c6127fa3
SS
621}
622
e5d7a619 623static void list_builtins(struct string_list *out, unsigned int exclude_option)
8893fd95
JK
624{
625 int i;
e9547947
NTND
626 for (i = 0; i < ARRAY_SIZE(commands); i++) {
627 if (exclude_option &&
628 (commands[i].option & exclude_option))
629 continue;
e5d7a619 630 string_list_append(out, commands[i].cmd);
e9547947 631 }
8893fd95
JK
632}
633
63ca1c09
AK
634#ifdef STRIP_EXTENSION
635static void strip_extension(const char **argv)
636{
637 size_t len;
638
639 if (strip_suffix(argv[0], STRIP_EXTENSION, &len))
640 argv[0] = xmemdupz(argv[0], len);
641}
642#else
643#define strip_extension(cmd)
644#endif
645
3f784a4d 646static void handle_builtin(int argc, const char **argv)
231af832 647{
2c6b6d9f 648 struct argv_array args = ARGV_ARRAY_INIT;
63ca1c09 649 const char *cmd;
c4f901d1 650 struct cmd_struct *builtin;
23326d14 651
63ca1c09
AK
652 strip_extension(argv);
653 cmd = argv[0];
231af832 654
2c6b6d9f 655 /* Turn "git cmd --help" into "git help --exclude-guides cmd" */
1cd95087 656 if (argc > 1 && !strcmp(argv[1], "--help")) {
2c6b6d9f
RT
657 int i;
658
1cd95087
LT
659 argv[1] = argv[0];
660 argv[0] = cmd = "help";
2c6b6d9f
RT
661
662 for (i = 0; i < argc; i++) {
663 argv_array_push(&args, argv[i]);
664 if (!i)
665 argv_array_push(&args, "--exclude-guides");
666 }
667
668 argc++;
669 argv = args.argv;
1cd95087
LT
670 }
671
c4f901d1 672 builtin = get_builtin(cmd);
441981bc
JH
673 if (builtin)
674 exit(run_builtin(builtin, argc, argv));
2c6b6d9f 675 argv_array_clear(&args);
231af832
LT
676}
677
7550be0a
JH
678static void execv_dashed_external(const char **argv)
679{
2b296c93 680 struct child_process cmd = CHILD_PROCESS_INIT;
d8e96fd8 681 int status;
7550be0a 682
74866d75 683 if (get_super_prefix())
8aa8c140 684 die(_("%s doesn't support --super-prefix"), argv[0]);
74866d75 685
595d59e2 686 if (use_pager == -1 && !is_builtin(argv[0]))
92058e4d 687 use_pager = check_pager_config(argv[0]);
030149a4
JN
688 commit_pager_choice();
689
2b296c93
JK
690 argv_array_pushf(&cmd.args, "git-%s", argv[0]);
691 argv_array_pushv(&cmd.args, argv + 1);
692 cmd.clean_on_exit = 1;
46df6906 693 cmd.wait_after_clean = 1;
2b296c93 694 cmd.silent_exec_failure = 1;
ee4512ed 695 cmd.trace2_child_class = "dashed";
7550be0a 696
ee4512ed
JH
697 trace2_cmd_name("_run_dashed_");
698
699 /*
700 * The code in run_command() logs trace2 child_start/child_exit
701 * events, so we do not need to report exec/exec_result events here.
702 */
2b296c93 703 trace_argv_printf(cmd.args.argv, "trace: exec:");
7550be0a 704
d8e96fd8 705 /*
246f0ede
JK
706 * If we fail because the command is not found, it is
707 * OK to return. Otherwise, we just pass along the status code,
708 * or our usual generic code if we were not even able to exec
709 * the program.
d8e96fd8 710 */
2b296c93 711 status = run_command(&cmd);
ee4512ed
JH
712
713 /*
714 * If the child process ran and we are now going to exit, emit a
715 * generic string as our trace2 command verb to indicate that we
716 * launched a dashed command.
717 */
246f0ede 718 if (status >= 0)
5709e036 719 exit(status);
246f0ede
JK
720 else if (errno != ENOENT)
721 exit(128);
7550be0a
JH
722}
723
a907e1b6
AS
724static int run_argv(int *argcp, const char ***argv)
725{
726 int done_alias = 0;
c6d75bc1 727 struct string_list cmd_list = STRING_LIST_INIT_NODUP;
82f71d9a 728 struct string_list_item *seen;
a907e1b6
AS
729
730 while (1) {
441981bc
JH
731 /*
732 * If we tried alias and futzed with our environment,
733 * it no longer is safe to invoke builtins directly in
734 * general. We have to spawn them as dashed externals.
735 *
736 * NEEDSWORK: if we can figure out cases
737 * where it is safe to do, we can avoid spawning a new
738 * process.
739 */
740 if (!done_alias)
741 handle_builtin(*argcp, *argv);
ee4512ed
JH
742 else if (get_builtin(**argv)) {
743 struct argv_array args = ARGV_ARRAY_INIT;
744 int i;
745
746 /*
747 * The current process is committed to launching a
748 * child process to run the command named in (**argv)
749 * and exiting. Log a generic string as the trace2
750 * command verb to indicate this. Note that the child
751 * process will log the actual verb when it runs.
752 */
753 trace2_cmd_name("_run_git_alias_");
754
755 if (get_super_prefix())
756 die("%s doesn't support --super-prefix", **argv);
757
758 commit_pager_choice();
759
760 argv_array_push(&args, "git");
761 for (i = 0; i < *argcp; i++)
762 argv_array_push(&args, (*argv)[i]);
763
764 trace_argv_printf(args.argv, "trace: exec:");
765
766 /*
767 * if we fail because the command is not found, it is
768 * OK to return. Otherwise, we just pass along the status code.
769 */
770 i = run_command_v_opt_tr2(args.argv, RUN_SILENT_EXEC_FAILURE |
771 RUN_CLEAN_ON_EXIT, "git_alias");
772 if (i >= 0 || errno != ENOENT)
773 exit(i);
774 die("could not execute builtin %s", **argv);
775 }
ee4512ed 776
a907e1b6
AS
777 /* .. then try the external ones */
778 execv_dashed_external(*argv);
779
82f71d9a
TS
780 seen = unsorted_string_list_lookup(&cmd_list, *argv[0]);
781 if (seen) {
782 int i;
783 struct strbuf sb = STRBUF_INIT;
784 for (i = 0; i < cmd_list.nr; i++) {
785 struct string_list_item *item = &cmd_list.items[i];
786
787 strbuf_addf(&sb, "\n %s", item->string);
788 if (item == seen)
789 strbuf_addstr(&sb, " <==");
790 else if (i == cmd_list.nr - 1)
791 strbuf_addstr(&sb, " ==>");
792 }
c6d75bc1 793 die(_("alias loop detected: expansion of '%s' does"
82f71d9a 794 " not terminate:%s"), cmd_list.items[0].string, sb.buf);
c6d75bc1
TS
795 }
796
797 string_list_append(&cmd_list, *argv[0]);
798
799 /*
800 * It could be an alias -- this works around the insanity
a907e1b6
AS
801 * of overriding "git log" with "git show" by having
802 * alias.log = show
803 */
c0562611 804 if (!handle_alias(argcp, argv))
a907e1b6
AS
805 break;
806 done_alias = 1;
807 }
808
c6d75bc1
TS
809 string_list_clear(&cmd_list, 0);
810
a907e1b6
AS
811 return done_alias;
812}
813
3f2e2297 814int cmd_main(int argc, const char **argv)
8e49d503 815{
4dd47c3b 816 const char *cmd;
8fa7975b 817 int done_help = 0;
231af832 818
650c4492 819 cmd = argv[0];
2cd72b0b 820 if (!cmd)
4dd47c3b 821 cmd = "git-help";
6854a8f5
JK
822 else {
823 const char *slash = find_last_dir_sep(cmd);
824 if (slash)
825 cmd = slash + 1;
826 }
8e49d503 827
578da039
KB
828 trace_command_performance(argv);
829
231af832
LT
830 /*
831 * "git-xxxx" is the same as "git xxxx", but we obviously:
832 *
833 * - cannot take flags in between the "git" and the "xxxx".
834 * - cannot execute it externally (since it would just do
835 * the same thing over again)
836 *
3f784a4d
SS
837 * So we just directly call the builtin handler, and die if
838 * that one cannot handle it.
231af832 839 */
ae021d87 840 if (skip_prefix(cmd, "git-", &cmd)) {
231af832 841 argv[0] = cmd;
3f784a4d 842 handle_builtin(argc, argv);
8aa8c140 843 die(_("cannot handle %s as a builtin"), cmd);
231af832 844 }
8e49d503 845
231af832 846 /* Look for flags.. */
6acbcb92
JS
847 argv++;
848 argc--;
4394efec 849 handle_options(&argv, &argc, NULL);
6acbcb92 850 if (argc > 0) {
6d877803
JK
851 /* translate --help and --version into commands */
852 skip_prefix(argv[0], "--", &argv[0]);
6acbcb92 853 } else {
3d7e2d85 854 /* The user didn't specify a command; give them help */
73e25e7c 855 commit_pager_choice();
8aa8c140 856 printf(_("usage: %s\n\n"), git_usage_string);
3d7e2d85 857 list_common_cmds_help();
421a9769 858 printf("\n%s\n", _(git_more_info_string));
3d7e2d85 859 exit(1);
97fc6c5f 860 }
6acbcb92 861 cmd = argv[0];
231af832
LT
862
863 /*
511707d4 864 * We use PATH to find git commands, but we prepend some higher
3ea3c215 865 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
511707d4
SP
866 * environment, and the $(gitexecdir) from the Makefile at build
867 * time.
231af832 868 */
e1464ca7 869 setup_path();
8e49d503 870
a025463b 871 while (1) {
8fa7975b 872 int was_alias = run_argv(&argc, &argv);
a907e1b6 873 if (errno != ENOENT)
a025463b 874 break;
a907e1b6 875 if (was_alias) {
fc045fe7
AS
876 fprintf(stderr, _("expansion of alias '%s' failed; "
877 "'%s' is not a git command\n"),
f3dd015c
TT
878 cmd, argv[0]);
879 exit(1);
880 }
a907e1b6
AS
881 if (!done_help) {
882 cmd = argv[0] = help_unknown_cmd(cmd);
883 done_help = 1;
884 } else
885 break;
f3dd015c 886 }
10b15b86 887
fc045fe7 888 fprintf(stderr, _("failed to run command '%s': %s\n"),
33ebb871 889 cmd, strerror(errno));
8e49d503
AE
890
891 return 1;
892}