compat/mingw.c: Fix some sparse warnings
[git/git.git] / git.c
CommitLineData
85023577 1#include "builtin.h"
2b11e317 2#include "cache.h"
fd5c363d
TF
3#include "exec_cmd.h"
4#include "help.h"
575ba9d6 5#include "quote.h"
d8e96fd8 6#include "run-command.h"
8e49d503 7
822a7d50 8const char git_usage_string[] =
03a0fb0c
KB
9 "git [--version] [--help] [-c name=value]\n"
10 " [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
a1bea2c1
JT
11 " [-p|--paginate|--no-pager] [--no-replace-objects] [--bare]\n"
12 " [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
62b4698e 13 " <command> [<args>]";
822a7d50 14
b7d96819 15const char git_more_info_string[] =
73903d0b
PO
16 N_("'git help -a' and 'git help -g' lists available subcommands and some\n"
17 "concept guides. See 'git help <command>' or 'git help <concept>'\n"
18 "to read about a specific subcommand or concept.");
b7d96819 19
e37c1329 20static struct startup_info git_startup_info;
4e10738a 21static int use_pager = -1;
4e10738a
JK
22
23static void commit_pager_choice(void) {
24 switch (use_pager) {
25 case 0:
26 setenv("GIT_PAGER", "cat", 1);
27 break;
28 case 1:
29 setup_pager();
30 break;
31 default:
32 break;
33 }
34}
35
4b25d091 36static int handle_options(const char ***argv, int *argc, int *envchanged)
4ab243a9 37{
73546c08 38 const char **orig_argv = *argv;
4ab243a9
JS
39
40 while (*argc > 0) {
41 const char *cmd = (*argv)[0];
42 if (cmd[0] != '-')
43 break;
44
6acbcb92
JS
45 /*
46 * For legacy reasons, the "version" and "help"
47 * commands can be written with "--" prepended
48 * to make them look like flags.
49 */
50 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
51 break;
52
53 /*
54 * Check remaining flags.
55 */
cc44c765 56 if (!prefixcmp(cmd, "--exec-path")) {
6acbcb92
JS
57 cmd += 11;
58 if (*cmd == '=')
384df833 59 git_set_argv_exec_path(cmd + 1);
6acbcb92
JS
60 else {
61 puts(git_exec_path());
62 exit(0);
63 }
89a56bfb
MH
64 } else if (!strcmp(cmd, "--html-path")) {
65 puts(system_path(GIT_HTML_PATH));
66 exit(0);
f2dd8c37
JS
67 } else if (!strcmp(cmd, "--man-path")) {
68 puts(system_path(GIT_MAN_PATH));
69 exit(0);
70 } else if (!strcmp(cmd, "--info-path")) {
71 puts(system_path(GIT_INFO_PATH));
72 exit(0);
6acbcb92 73 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
4e10738a 74 use_pager = 1;
463a849d 75 } else if (!strcmp(cmd, "--no-pager")) {
4e10738a 76 use_pager = 0;
463a849d
MM
77 if (envchanged)
78 *envchanged = 1;
b0fa7ab5
CC
79 } else if (!strcmp(cmd, "--no-replace-objects")) {
80 read_replace_refs = 0;
6476b38b
CC
81 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
82 if (envchanged)
83 *envchanged = 1;
6acbcb92 84 } else if (!strcmp(cmd, "--git-dir")) {
c321f00d
BG
85 if (*argc < 2) {
86 fprintf(stderr, "No directory given for --git-dir.\n" );
87 usage(git_usage_string);
88 }
45b09794 89 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
90 if (envchanged)
91 *envchanged = 1;
6acbcb92
JS
92 (*argv)++;
93 (*argc)--;
cc44c765 94 } else if (!prefixcmp(cmd, "--git-dir=")) {
45b09794 95 setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1);
4394efec
ML
96 if (envchanged)
97 *envchanged = 1;
a1bea2c1
JT
98 } else if (!strcmp(cmd, "--namespace")) {
99 if (*argc < 2) {
100 fprintf(stderr, "No namespace given for --namespace.\n" );
101 usage(git_usage_string);
102 }
103 setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
104 if (envchanged)
105 *envchanged = 1;
106 (*argv)++;
107 (*argc)--;
108 } else if (!prefixcmp(cmd, "--namespace=")) {
109 setenv(GIT_NAMESPACE_ENVIRONMENT, cmd + 12, 1);
110 if (envchanged)
111 *envchanged = 1;
892c41b9
ML
112 } else if (!strcmp(cmd, "--work-tree")) {
113 if (*argc < 2) {
114 fprintf(stderr, "No directory given for --work-tree.\n" );
115 usage(git_usage_string);
116 }
117 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
118 if (envchanged)
119 *envchanged = 1;
892c41b9
ML
120 (*argv)++;
121 (*argc)--;
122 } else if (!prefixcmp(cmd, "--work-tree=")) {
123 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
4394efec
ML
124 if (envchanged)
125 *envchanged = 1;
6acbcb92 126 } else if (!strcmp(cmd, "--bare")) {
ef5ddb2f 127 static char git_dir[PATH_MAX+1];
6adcca3f 128 is_bare_repository_cfg = 1;
9277d602 129 setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
2cd83d10 130 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
4394efec
ML
131 if (envchanged)
132 *envchanged = 1;
8b1fa778
AR
133 } else if (!strcmp(cmd, "-c")) {
134 if (*argc < 2) {
135 fprintf(stderr, "-c expects a configuration string\n" );
136 usage(git_usage_string);
137 }
2b64fc89 138 git_config_push_parameter((*argv)[1]);
8b1fa778
AR
139 (*argv)++;
140 (*argc)--;
823ab40f
JK
141 } else if (!strcmp(cmd, "--literal-pathspecs")) {
142 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1);
143 if (envchanged)
144 *envchanged = 1;
145 } else if (!strcmp(cmd, "--no-literal-pathspecs")) {
146 setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1);
147 if (envchanged)
148 *envchanged = 1;
6acbcb92
JS
149 } else {
150 fprintf(stderr, "Unknown option: %s\n", cmd);
822a7d50 151 usage(git_usage_string);
6acbcb92 152 }
4ab243a9
JS
153
154 (*argv)++;
155 (*argc)--;
4ab243a9 156 }
73546c08 157 return (*argv) - orig_argv;
4ab243a9
JS
158}
159
2b11e317
JS
160static int handle_alias(int *argcp, const char ***argv)
161{
af05d679 162 int envchanged = 0, ret = 0, saved_errno = errno;
2b11e317 163 const char *subdir;
0347a8c7 164 int count, option_count;
4b25d091 165 const char **new_argv;
94351118
JK
166 const char *alias_command;
167 char *alias_string;
e85dc0a3 168 int unused_nongit;
2b11e317 169
e85dc0a3 170 subdir = setup_git_directory_gently(&unused_nongit);
0347a8c7
ML
171
172 alias_command = (*argv)[0];
94351118 173 alias_string = alias_lookup(alias_command);
0347a8c7 174 if (alias_string) {
dfd42a3c 175 if (alias_string[0] == '!') {
7f51f8bc
EFL
176 const char **alias_argv;
177 int argc = *argcp, i;
178
030149a4 179 commit_pager_choice();
7f51f8bc
EFL
180
181 /* build alias_argv */
182 alias_argv = xmalloc(sizeof(*alias_argv) * (argc + 1));
183 alias_argv[0] = alias_string + 1;
184 for (i = 1; i < argc; ++i)
185 alias_argv[i] = (*argv)[i];
186 alias_argv[argc] = NULL;
187
26b05251 188 ret = run_command_v_opt(alias_argv, RUN_USING_SHELL);
7f51f8bc
EFL
189 if (ret >= 0) /* normal exit */
190 exit(ret);
191
192 die_errno("While expanding alias '%s': '%s'",
193 alias_command, alias_string + 1);
dfd42a3c 194 }
0347a8c7 195 count = split_cmdline(alias_string, &new_argv);
dc4179f9 196 if (count < 0)
ad9ac6db
GB
197 die("Bad alias.%s string: %s", alias_command,
198 split_cmdline_strerror(count));
4394efec
ML
199 option_count = handle_options(&new_argv, &count, &envchanged);
200 if (envchanged)
201 die("alias '%s' changes environment variables\n"
202 "You can use '!git' in the alias to do this.",
203 alias_command);
0347a8c7
ML
204 memmove(new_argv - option_count, new_argv,
205 count * sizeof(char *));
206 new_argv -= option_count;
207
208 if (count < 1)
209 die("empty alias for %s", alias_command);
210
211 if (!strcmp(alias_command, new_argv[0]))
212 die("recursive alias: %s", alias_command);
213
b319ce4c 214 trace_argv_printf(new_argv,
6ce4e61f
CC
215 "trace: alias expansion: %s =>",
216 alias_command);
575ba9d6 217
4b25d091 218 new_argv = xrealloc(new_argv, sizeof(char *) *
6167c136 219 (count + *argcp));
0347a8c7 220 /* insert after command name */
4b25d091 221 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
2b11e317 222
0347a8c7
ML
223 *argv = new_argv;
224 *argcp += count - 1;
2b11e317 225
0347a8c7 226 ret = 1;
2b11e317
JS
227 }
228
7be77de2 229 if (subdir && chdir(subdir))
d824cbba 230 die_errno("Cannot change to '%s'", subdir);
2b11e317 231
47e5c0ca
JS
232 errno = saved_errno;
233
2b11e317
JS
234 return ret;
235}
236
ee38dfb8
NTND
237#define RUN_SETUP (1<<0)
238#define RUN_SETUP_GENTLY (1<<1)
239#define USE_PAGER (1<<2)
7eff28a9
SP
240/*
241 * require working tree to be present -- anything uses this needs
242 * RUN_SETUP for reading from the configuration file.
243 */
ee38dfb8 244#define NEED_WORK_TREE (1<<3)
a633fca0 245
47d0b4ff
LT
246struct cmd_struct {
247 const char *cmd;
248 int (*fn)(int, const char **, const char *);
249 int option;
250};
251
f172f334 252static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
47d0b4ff 253{
99caeed0 254 int status, help;
0f157315 255 struct stat st;
47d0b4ff
LT
256 const char *prefix;
257
258 prefix = NULL;
99caeed0
JN
259 help = argc == 2 && !strcmp(argv[1], "-h");
260 if (!help) {
261 if (p->option & RUN_SETUP)
262 prefix = setup_git_directory();
ee38dfb8
NTND
263 if (p->option & RUN_SETUP_GENTLY) {
264 int nongit_ok;
265 prefix = setup_git_directory_gently(&nongit_ok);
266 }
99caeed0 267
ee38dfb8 268 if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY))
99caeed0
JN
269 use_pager = check_pager_config(p->cmd);
270 if (use_pager == -1 && p->option & USE_PAGER)
271 use_pager = 1;
a9ca8a85
NTND
272
273 if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
274 startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
275 trace_repo_setup(prefix);
99caeed0 276 }
4e10738a
JK
277 commit_pager_choice();
278
99caeed0 279 if (!help && p->option & NEED_WORK_TREE)
59f0f2f3
MH
280 setup_work_tree();
281
b319ce4c 282 trace_argv_printf(argv, "trace: built-in: git");
47d0b4ff 283
0f157315
LT
284 status = p->fn(argc, argv, prefix);
285 if (status)
47e3de0e 286 return status;
0f157315
LT
287
288 /* Somebody closed stdout? */
289 if (fstat(fileno(stdout), &st))
290 return 0;
291 /* Ignore write errors for pipes and sockets.. */
292 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
293 return 0;
294
295 /* Check for ENOSPC and EIO errors.. */
0227f988 296 if (fflush(stdout))
d824cbba 297 die_errno("write failure on standard output");
0227f988
LT
298 if (ferror(stdout))
299 die("unknown write failure on standard output");
300 if (fclose(stdout))
d824cbba 301 die_errno("close failed on standard output");
0f157315 302 return 0;
47d0b4ff
LT
303}
304
305static void handle_internal_command(int argc, const char **argv)
231af832
LT
306{
307 const char *cmd = argv[0];
47d0b4ff 308 static struct cmd_struct commands[] = {
7ae3df8c 309 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
d97bc5de 310 { "annotate", cmd_annotate, RUN_SETUP },
d1ea8962 311 { "apply", cmd_apply, RUN_SETUP_GENTLY },
265d5280 312 { "archive", cmd_archive },
24c51280 313 { "bisect--helper", cmd_bisect__helper, RUN_SETUP },
4f0219a4 314 { "blame", cmd_blame, RUN_SETUP },
1da1b3a3 315 { "branch", cmd_branch, RUN_SETUP },
2cb60093 316 { "bundle", cmd_bundle, RUN_SETUP_GENTLY },
efffea03 317 { "cat-file", cmd_cat_file, RUN_SETUP },
ef5dd8a9 318 { "check-attr", cmd_check_attr, RUN_SETUP },
368aa529 319 { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
ef5dd8a9 320 { "check-ref-format", cmd_check_ref_format },
782c2d65 321 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
4465f410
JS
322 { "checkout-index", cmd_checkout_index,
323 RUN_SETUP | NEED_WORK_TREE},
e827633a 324 { "cherry", cmd_cherry, RUN_SETUP },
7ae3df8c 325 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
113f10f2 326 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
ef5dd8a9 327 { "clone", cmd_clone },
7e29b825 328 { "column", cmd_column, RUN_SETUP_GENTLY },
f5bbc322 329 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
efffea03 330 { "commit-tree", cmd_commit_tree, RUN_SETUP },
3ba7e6e2 331 { "config", cmd_config, RUN_SETUP_GENTLY },
8112894d 332 { "count-objects", cmd_count_objects, RUN_SETUP },
e30b2feb 333 { "credential", cmd_credential, RUN_SETUP_GENTLY },
9a0eaf83 334 { "describe", cmd_describe, RUN_SETUP },
89d07f75 335 { "diff", cmd_diff },
4f38f6b5 336 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
efffea03 337 { "diff-index", cmd_diff_index, RUN_SETUP },
efffea03 338 { "diff-tree", cmd_diff_tree, RUN_SETUP },
f2dc849e 339 { "fast-export", cmd_fast_export, RUN_SETUP },
b888d61c 340 { "fetch", cmd_fetch, RUN_SETUP },
2d4177c0 341 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
efffea03 342 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
9f613ddd 343 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
efffea03 344 { "format-patch", cmd_format_patch, RUN_SETUP },
b4dfefe0
MW
345 { "fsck", cmd_fsck, RUN_SETUP },
346 { "fsck-objects", cmd_fsck, RUN_SETUP },
6757ada4 347 { "gc", cmd_gc, RUN_SETUP },
f754fa9c 348 { "get-tar-commit-id", cmd_get_tar_commit_id },
ff38d1a9 349 { "grep", cmd_grep, RUN_SETUP_GENTLY },
b28a1ce0 350 { "hash-object", cmd_hash_object },
f754fa9c 351 { "help", cmd_help },
e0fce074 352 { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
515377ea 353 { "init", cmd_init_db },
f754fa9c 354 { "init-db", cmd_init_db },
1fda91b5 355 { "log", cmd_log, RUN_SETUP },
efffea03 356 { "ls-files", cmd_ls_files, RUN_SETUP },
f0ef6a6e 357 { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
ef5dd8a9 358 { "ls-tree", cmd_ls_tree, RUN_SETUP },
f754fa9c
JH
359 { "mailinfo", cmd_mailinfo },
360 { "mailsplit", cmd_mailsplit },
1c7b76be 361 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
71dfbf22 362 { "merge-base", cmd_merge_base, RUN_SETUP },
3668d423 363 { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
0ecace72 364 { "merge-index", cmd_merge_index, RUN_SETUP },
a00a42ae 365 { "merge-ours", cmd_merge_ours, RUN_SETUP },
e1b3a2ca 366 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
8cc5b290
AP
367 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
368 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
1736855c 369 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
907a7cb5 370 { "merge-tree", cmd_merge_tree, RUN_SETUP },
112dd514 371 { "mktag", cmd_mktag, RUN_SETUP },
633e3556 372 { "mktree", cmd_mktree, RUN_SETUP },
7ae3df8c 373 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
efffea03 374 { "name-rev", cmd_name_rev, RUN_SETUP },
cd067d3b 375 { "notes", cmd_notes, RUN_SETUP },
efffea03 376 { "pack-objects", cmd_pack_objects, RUN_SETUP },
377d0276 377 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
ef5dd8a9 378 { "pack-refs", cmd_pack_refs, RUN_SETUP },
dedc0ec5 379 { "patch-id", cmd_patch_id },
f0ef6a6e 380 { "peek-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
d97bc5de 381 { "pickaxe", cmd_blame, RUN_SETUP },
efffea03
JH
382 { "prune", cmd_prune, RUN_SETUP },
383 { "prune-packed", cmd_prune_packed, RUN_SETUP },
102cb085 384 { "push", cmd_push, RUN_SETUP },
efffea03 385 { "read-tree", cmd_read_tree, RUN_SETUP },
be5908ae 386 { "receive-pack", cmd_receive_pack },
4264dc15 387 { "reflog", cmd_reflog, RUN_SETUP },
211c8968 388 { "remote", cmd_remote, RUN_SETUP },
7f3ecebf 389 { "remote-ext", cmd_remote_ext },
3a9ed4bd 390 { "remote-fd", cmd_remote_fd },
54b0c1e0 391 { "replace", cmd_replace, RUN_SETUP },
6390c905 392 { "repo-config", cmd_repo_config, RUN_SETUP_GENTLY },
658f3650 393 { "rerere", cmd_rerere, RUN_SETUP },
0e5a7faa 394 { "reset", cmd_reset, RUN_SETUP },
efffea03 395 { "rev-list", cmd_rev_list, RUN_SETUP },
5410a02a 396 { "rev-parse", cmd_rev_parse },
7ae3df8c 397 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
271bb087 398 { "rm", cmd_rm, RUN_SETUP },
96249c04 399 { "send-pack", cmd_send_pack, RUN_SETUP },
773b69bf 400 { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
1fda91b5 401 { "show", cmd_show, RUN_SETUP },
ef5dd8a9
NTND
402 { "show-branch", cmd_show_branch, RUN_SETUP },
403 { "show-ref", cmd_show_ref, RUN_SETUP },
404 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
10762323 405 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
f754fa9c 406 { "stripspace", cmd_stripspace },
efffea03 407 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
62e09ce9 408 { "tag", cmd_tag, RUN_SETUP },
9cb90b80 409 { "tar-tree", cmd_tar_tree },
b5325818 410 { "unpack-file", cmd_unpack_file, RUN_SETUP },
efffea03
JH
411 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
412 { "update-index", cmd_update_index, RUN_SETUP },
413 { "update-ref", cmd_update_ref, RUN_SETUP },
53a1116c 414 { "update-server-info", cmd_update_server_info, RUN_SETUP },
39345a21 415 { "upload-archive", cmd_upload_archive },
1bc01efe 416 { "upload-archive--writer", cmd_upload_archive_writer },
2bc8c1a8 417 { "var", cmd_var, RUN_SETUP_GENTLY },
ef5dd8a9 418 { "verify-pack", cmd_verify_pack },
2ae68fcb 419 { "verify-tag", cmd_verify_tag, RUN_SETUP },
f754fa9c 420 { "version", cmd_version },
1fda91b5 421 { "whatchanged", cmd_whatchanged, RUN_SETUP },
efffea03 422 { "write-tree", cmd_write_tree, RUN_SETUP },
231af832
LT
423 };
424 int i;
23326d14
JS
425 static const char ext[] = STRIP_EXTENSION;
426
427 if (sizeof(ext) > 1) {
428 i = strlen(argv[0]) - strlen(ext);
429 if (i > 0 && !strcmp(argv[0] + i, ext)) {
e8eec71d 430 char *argv0 = xstrdup(argv[0]);
23326d14
JS
431 argv[0] = cmd = argv0;
432 argv0[i] = '\0';
433 }
434 }
231af832 435
1cd95087
LT
436 /* Turn "git cmd --help" into "git help cmd" */
437 if (argc > 1 && !strcmp(argv[1], "--help")) {
438 argv[1] = argv[0];
439 argv[0] = cmd = "help";
440 }
441
231af832
LT
442 for (i = 0; i < ARRAY_SIZE(commands); i++) {
443 struct cmd_struct *p = commands+i;
444 if (strcmp(p->cmd, cmd))
445 continue;
f172f334 446 exit(run_builtin(p, argc, argv));
231af832
LT
447 }
448}
449
7550be0a
JH
450static void execv_dashed_external(const char **argv)
451{
f285a2d7 452 struct strbuf cmd = STRBUF_INIT;
7550be0a 453 const char *tmp;
d8e96fd8 454 int status;
7550be0a 455
92058e4d
JK
456 if (use_pager == -1)
457 use_pager = check_pager_config(argv[0]);
030149a4
JN
458 commit_pager_choice();
459
7550be0a
JH
460 strbuf_addf(&cmd, "git-%s", argv[0]);
461
462 /*
463 * argv[0] must be the git command, but the argv array
464 * belongs to the caller, and may be reused in
465 * subsequent loop iterations. Save argv[0] and
466 * restore it on error.
467 */
468 tmp = argv[0];
469 argv[0] = cmd.buf;
470
471 trace_argv_printf(argv, "trace: exec:");
472
d8e96fd8
JK
473 /*
474 * if we fail because the command is not found, it is
475 * OK to return. Otherwise, we just pass along the status code.
476 */
10c6cddd 477 status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE | RUN_CLEAN_ON_EXIT);
0ac77ec3 478 if (status >= 0 || errno != ENOENT)
5709e036 479 exit(status);
7550be0a
JH
480
481 argv[0] = tmp;
482
483 strbuf_release(&cmd);
484}
485
a907e1b6
AS
486static int run_argv(int *argcp, const char ***argv)
487{
488 int done_alias = 0;
489
490 while (1) {
491 /* See if it's an internal command */
492 handle_internal_command(*argcp, *argv);
493
494 /* .. then try the external ones */
495 execv_dashed_external(*argv);
496
497 /* It could be an alias -- this works around the insanity
498 * of overriding "git log" with "git show" by having
499 * alias.log = show
500 */
501 if (done_alias || !handle_alias(argcp, argv))
502 break;
503 done_alias = 1;
504 }
505
506 return done_alias;
507}
508
7550be0a 509
47d0b4ff 510int main(int argc, const char **argv)
8e49d503 511{
4dd47c3b 512 const char *cmd;
231af832 513
e37c1329
NTND
514 startup_info = &git_startup_info;
515
2cd72b0b
SP
516 cmd = git_extract_argv0_path(argv[0]);
517 if (!cmd)
4dd47c3b 518 cmd = "git-help";
8e49d503 519
5e9637c6
ÆAB
520 git_setup_gettext();
521
231af832
LT
522 /*
523 * "git-xxxx" is the same as "git xxxx", but we obviously:
524 *
525 * - cannot take flags in between the "git" and the "xxxx".
526 * - cannot execute it externally (since it would just do
527 * the same thing over again)
528 *
529 * So we just directly call the internal command handler, and
530 * die if that one cannot handle it.
531 */
cc44c765 532 if (!prefixcmp(cmd, "git-")) {
231af832
LT
533 cmd += 4;
534 argv[0] = cmd;
47d0b4ff 535 handle_internal_command(argc, argv);
231af832
LT
536 die("cannot handle %s internally", cmd);
537 }
8e49d503 538
231af832 539 /* Look for flags.. */
6acbcb92
JS
540 argv++;
541 argc--;
4394efec 542 handle_options(&argv, &argc, NULL);
6acbcb92 543 if (argc > 0) {
cc44c765 544 if (!prefixcmp(argv[0], "--"))
6acbcb92
JS
545 argv[0] += 2;
546 } else {
3d7e2d85 547 /* The user didn't specify a command; give them help */
73e25e7c 548 commit_pager_choice();
3d7e2d85
SP
549 printf("usage: %s\n\n", git_usage_string);
550 list_common_cmds_help();
421a9769 551 printf("\n%s\n", _(git_more_info_string));
3d7e2d85 552 exit(1);
97fc6c5f 553 }
6acbcb92 554 cmd = argv[0];
231af832
LT
555
556 /*
511707d4 557 * We use PATH to find git commands, but we prepend some higher
3ea3c215 558 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
511707d4
SP
559 * environment, and the $(gitexecdir) from the Makefile at build
560 * time.
231af832 561 */
e1464ca7 562 setup_path();
8e49d503 563
a025463b 564 while (1) {
a907e1b6
AS
565 static int done_help = 0;
566 static int was_alias = 0;
567 was_alias = run_argv(&argc, &argv);
568 if (errno != ENOENT)
a025463b 569 break;
a907e1b6 570 if (was_alias) {
f3dd015c 571 fprintf(stderr, "Expansion of alias '%s' failed; "
7283bbc7 572 "'%s' is not a git command\n",
f3dd015c
TT
573 cmd, argv[0]);
574 exit(1);
575 }
a907e1b6
AS
576 if (!done_help) {
577 cmd = argv[0] = help_unknown_cmd(cmd);
578 done_help = 1;
579 } else
580 break;
f3dd015c 581 }
10b15b86
AR
582
583 fprintf(stderr, "Failed to run command '%s': %s\n",
33ebb871 584 cmd, strerror(errno));
8e49d503
AE
585
586 return 1;
587}