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