Allow core.askpass to override SSH_ASKPASS.
[git/git.git] / git.c
CommitLineData
85023577 1#include "builtin.h"
77cb17e9 2#include "exec_cmd.h"
2b11e317 3#include "cache.h"
575ba9d6 4#include "quote.h"
d8e96fd8 5#include "run-command.h"
8e49d503 6
822a7d50 7const char git_usage_string[] =
511a3fc1 8 "git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]\n"
b0fa7ab5 9 " [-p|--paginate|--no-pager] [--no-replace-objects]\n"
511a3fc1 10 " [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]\n"
8b1fa778 11 " [-c name=value\n"
511a3fc1 12 " [--help] COMMAND [ARGS]";
822a7d50 13
b7d96819
TL
14const char git_more_info_string[] =
15 "See 'git help COMMAND' for more information on a specific command.";
16
4e10738a
JK
17static int use_pager = -1;
18struct pager_config {
19 const char *cmd;
20 int val;
21};
22
23static int pager_command_config(const char *var, const char *value, void *data)
24{
25 struct pager_config *c = data;
26 if (!prefixcmp(var, "pager.") && !strcmp(var + 6, c->cmd))
27 c->val = git_config_bool(var, value);
28 return 0;
29}
30
31/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
32int check_pager_config(const char *cmd)
33{
34 struct pager_config c;
35 c.cmd = cmd;
36 c.val = -1;
37 git_config(pager_command_config, &c);
38 return c.val;
39}
40
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
4b25d091 54static int handle_options(const char ***argv, int *argc, int *envchanged)
4ab243a9
JS
55{
56 int handled = 0;
57
58 while (*argc > 0) {
59 const char *cmd = (*argv)[0];
60 if (cmd[0] != '-')
61 break;
62
6acbcb92
JS
63 /*
64 * For legacy reasons, the "version" and "help"
65 * commands can be written with "--" prepended
66 * to make them look like flags.
67 */
68 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
69 break;
70
71 /*
72 * Check remaining flags.
73 */
cc44c765 74 if (!prefixcmp(cmd, "--exec-path")) {
6acbcb92
JS
75 cmd += 11;
76 if (*cmd == '=')
384df833 77 git_set_argv_exec_path(cmd + 1);
6acbcb92
JS
78 else {
79 puts(git_exec_path());
80 exit(0);
81 }
89a56bfb
MH
82 } else if (!strcmp(cmd, "--html-path")) {
83 puts(system_path(GIT_HTML_PATH));
84 exit(0);
6acbcb92 85 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
4e10738a 86 use_pager = 1;
463a849d 87 } else if (!strcmp(cmd, "--no-pager")) {
4e10738a 88 use_pager = 0;
463a849d
MM
89 if (envchanged)
90 *envchanged = 1;
b0fa7ab5
CC
91 } else if (!strcmp(cmd, "--no-replace-objects")) {
92 read_replace_refs = 0;
6476b38b
CC
93 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
94 if (envchanged)
95 *envchanged = 1;
6acbcb92 96 } else if (!strcmp(cmd, "--git-dir")) {
c321f00d
BG
97 if (*argc < 2) {
98 fprintf(stderr, "No directory given for --git-dir.\n" );
99 usage(git_usage_string);
100 }
45b09794 101 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
102 if (envchanged)
103 *envchanged = 1;
6acbcb92
JS
104 (*argv)++;
105 (*argc)--;
e4b02333 106 handled++;
cc44c765 107 } else if (!prefixcmp(cmd, "--git-dir=")) {
45b09794 108 setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1);
4394efec
ML
109 if (envchanged)
110 *envchanged = 1;
892c41b9
ML
111 } else if (!strcmp(cmd, "--work-tree")) {
112 if (*argc < 2) {
113 fprintf(stderr, "No directory given for --work-tree.\n" );
114 usage(git_usage_string);
115 }
116 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
117 if (envchanged)
118 *envchanged = 1;
892c41b9
ML
119 (*argv)++;
120 (*argc)--;
121 } else if (!prefixcmp(cmd, "--work-tree=")) {
122 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
4394efec
ML
123 if (envchanged)
124 *envchanged = 1;
6acbcb92 125 } else if (!strcmp(cmd, "--bare")) {
ef5ddb2f 126 static char git_dir[PATH_MAX+1];
6adcca3f 127 is_bare_repository_cfg = 1;
9277d602 128 setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
4394efec
ML
129 if (envchanged)
130 *envchanged = 1;
8b1fa778
AR
131 } else if (!strcmp(cmd, "-c")) {
132 if (*argc < 2) {
133 fprintf(stderr, "-c expects a configuration string\n" );
134 usage(git_usage_string);
135 }
136 git_config_parse_parameter((*argv)[1]);
137 (*argv)++;
138 (*argc)--;
6acbcb92
JS
139 } else {
140 fprintf(stderr, "Unknown option: %s\n", cmd);
822a7d50 141 usage(git_usage_string);
6acbcb92 142 }
4ab243a9
JS
143
144 (*argv)++;
145 (*argc)--;
146 handled++;
147 }
148 return handled;
149}
150
2b11e317
JS
151static int handle_alias(int *argcp, const char ***argv)
152{
af05d679 153 int envchanged = 0, ret = 0, saved_errno = errno;
2b11e317 154 const char *subdir;
0347a8c7 155 int count, option_count;
4b25d091 156 const char **new_argv;
94351118
JK
157 const char *alias_command;
158 char *alias_string;
e85dc0a3 159 int unused_nongit;
2b11e317 160
e85dc0a3 161 subdir = setup_git_directory_gently(&unused_nongit);
0347a8c7
ML
162
163 alias_command = (*argv)[0];
94351118 164 alias_string = alias_lookup(alias_command);
0347a8c7 165 if (alias_string) {
dfd42a3c 166 if (alias_string[0] == '!') {
030149a4 167 commit_pager_choice();
a2f8028d 168 if (*argcp > 1) {
7a33bcbe 169 struct strbuf buf;
a2f8028d 170
7a33bcbe
PH
171 strbuf_init(&buf, PATH_MAX);
172 strbuf_addstr(&buf, alias_string);
b319ce4c 173 sq_quote_argv(&buf, (*argv) + 1, PATH_MAX);
a2f8028d 174 free(alias_string);
7a33bcbe 175 alias_string = buf.buf;
a2f8028d 176 }
dfd42a3c
TT
177 trace_printf("trace: alias to shell cmd: %s => %s\n",
178 alias_command, alias_string + 1);
179 ret = system(alias_string + 1);
180 if (ret >= 0 && WIFEXITED(ret) &&
181 WEXITSTATUS(ret) != 127)
182 exit(WEXITSTATUS(ret));
d7530708 183 die("Failed to run '%s' when expanding alias '%s'",
dfd42a3c
TT
184 alias_string + 1, alias_command);
185 }
0347a8c7 186 count = split_cmdline(alias_string, &new_argv);
dc4179f9
DM
187 if (count < 0)
188 die("Bad alias.%s string", alias_command);
4394efec
ML
189 option_count = handle_options(&new_argv, &count, &envchanged);
190 if (envchanged)
191 die("alias '%s' changes environment variables\n"
192 "You can use '!git' in the alias to do this.",
193 alias_command);
0347a8c7
ML
194 memmove(new_argv - option_count, new_argv,
195 count * sizeof(char *));
196 new_argv -= option_count;
197
198 if (count < 1)
199 die("empty alias for %s", alias_command);
200
201 if (!strcmp(alias_command, new_argv[0]))
202 die("recursive alias: %s", alias_command);
203
b319ce4c 204 trace_argv_printf(new_argv,
6ce4e61f
CC
205 "trace: alias expansion: %s =>",
206 alias_command);
575ba9d6 207
4b25d091 208 new_argv = xrealloc(new_argv, sizeof(char *) *
6167c136 209 (count + *argcp));
0347a8c7 210 /* insert after command name */
4b25d091 211 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
2b11e317 212
0347a8c7
ML
213 *argv = new_argv;
214 *argcp += count - 1;
2b11e317 215
0347a8c7 216 ret = 1;
2b11e317
JS
217 }
218
7be77de2 219 if (subdir && chdir(subdir))
d824cbba 220 die_errno("Cannot change to '%s'", subdir);
2b11e317 221
47e5c0ca
JS
222 errno = saved_errno;
223
2b11e317
JS
224 return ret;
225}
226
70827b15 227const char git_version_string[] = GIT_VERSION;
5b84f4d8 228
efffea03
JH
229#define RUN_SETUP (1<<0)
230#define USE_PAGER (1<<1)
7eff28a9
SP
231/*
232 * require working tree to be present -- anything uses this needs
233 * RUN_SETUP for reading from the configuration file.
234 */
7ae3df8c 235#define NEED_WORK_TREE (1<<2)
a633fca0 236
47d0b4ff
LT
237struct cmd_struct {
238 const char *cmd;
239 int (*fn)(int, const char **, const char *);
240 int option;
241};
242
f172f334 243static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
47d0b4ff 244{
99caeed0 245 int status, help;
0f157315 246 struct stat st;
47d0b4ff
LT
247 const char *prefix;
248
249 prefix = NULL;
99caeed0
JN
250 help = argc == 2 && !strcmp(argv[1], "-h");
251 if (!help) {
252 if (p->option & RUN_SETUP)
253 prefix = setup_git_directory();
254
255 if (use_pager == -1 && p->option & RUN_SETUP)
256 use_pager = check_pager_config(p->cmd);
257 if (use_pager == -1 && p->option & USE_PAGER)
258 use_pager = 1;
259 }
4e10738a
JK
260 commit_pager_choice();
261
99caeed0 262 if (!help && p->option & NEED_WORK_TREE)
59f0f2f3
MH
263 setup_work_tree();
264
b319ce4c 265 trace_argv_printf(argv, "trace: built-in: git");
47d0b4ff 266
0f157315
LT
267 status = p->fn(argc, argv, prefix);
268 if (status)
47e3de0e 269 return status;
0f157315
LT
270
271 /* Somebody closed stdout? */
272 if (fstat(fileno(stdout), &st))
273 return 0;
274 /* Ignore write errors for pipes and sockets.. */
275 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
276 return 0;
277
278 /* Check for ENOSPC and EIO errors.. */
0227f988 279 if (fflush(stdout))
d824cbba 280 die_errno("write failure on standard output");
0227f988
LT
281 if (ferror(stdout))
282 die("unknown write failure on standard output");
283 if (fclose(stdout))
d824cbba 284 die_errno("close failed on standard output");
0f157315 285 return 0;
47d0b4ff
LT
286}
287
288static void handle_internal_command(int argc, const char **argv)
231af832
LT
289{
290 const char *cmd = argv[0];
47d0b4ff 291 static struct cmd_struct commands[] = {
7ae3df8c 292 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
11920d28 293 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
d97bc5de 294 { "annotate", cmd_annotate, RUN_SETUP },
f754fa9c 295 { "apply", cmd_apply },
265d5280 296 { "archive", cmd_archive },
1bf072e3 297 { "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE },
4f0219a4 298 { "blame", cmd_blame, RUN_SETUP },
1da1b3a3 299 { "branch", cmd_branch, RUN_SETUP },
2e0afafe 300 { "bundle", cmd_bundle },
efffea03 301 { "cat-file", cmd_cat_file, RUN_SETUP },
782c2d65 302 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
4465f410
JS
303 { "checkout-index", cmd_checkout_index,
304 RUN_SETUP | NEED_WORK_TREE},
0864f264 305 { "check-ref-format", cmd_check_ref_format },
2d35d556 306 { "check-attr", cmd_check_attr, RUN_SETUP },
e827633a 307 { "cherry", cmd_cherry, RUN_SETUP },
7ae3df8c 308 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
8434c2f1 309 { "clone", cmd_clone },
113f10f2 310 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
f5bbc322 311 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
efffea03 312 { "commit-tree", cmd_commit_tree, RUN_SETUP },
e0d10e1c 313 { "config", cmd_config },
8112894d 314 { "count-objects", cmd_count_objects, RUN_SETUP },
9a0eaf83 315 { "describe", cmd_describe, RUN_SETUP },
89d07f75 316 { "diff", cmd_diff },
4f38f6b5 317 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
efffea03 318 { "diff-index", cmd_diff_index, RUN_SETUP },
efffea03 319 { "diff-tree", cmd_diff_tree, RUN_SETUP },
f2dc849e 320 { "fast-export", cmd_fast_export, RUN_SETUP },
b888d61c 321 { "fetch", cmd_fetch, RUN_SETUP },
2d4177c0 322 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
efffea03 323 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
9f613ddd 324 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
efffea03 325 { "format-patch", cmd_format_patch, RUN_SETUP },
b4dfefe0
MW
326 { "fsck", cmd_fsck, RUN_SETUP },
327 { "fsck-objects", cmd_fsck, RUN_SETUP },
6757ada4 328 { "gc", cmd_gc, RUN_SETUP },
f754fa9c 329 { "get-tar-commit-id", cmd_get_tar_commit_id },
678e484b 330 { "grep", cmd_grep },
b28a1ce0 331 { "hash-object", cmd_hash_object },
f754fa9c 332 { "help", cmd_help },
3bb72562 333 { "index-pack", cmd_index_pack },
515377ea 334 { "init", cmd_init_db },
f754fa9c 335 { "init-db", cmd_init_db },
efffea03
JH
336 { "log", cmd_log, RUN_SETUP | USE_PAGER },
337 { "ls-files", cmd_ls_files, RUN_SETUP },
338 { "ls-tree", cmd_ls_tree, RUN_SETUP },
8951d7c1 339 { "ls-remote", cmd_ls_remote },
f754fa9c
JH
340 { "mailinfo", cmd_mailinfo },
341 { "mailsplit", cmd_mailsplit },
1c7b76be 342 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
71dfbf22 343 { "merge-base", cmd_merge_base, RUN_SETUP },
ba1f5f35 344 { "merge-file", cmd_merge_file },
0ecace72 345 { "merge-index", cmd_merge_index, RUN_SETUP },
a00a42ae 346 { "merge-ours", cmd_merge_ours, RUN_SETUP },
e1b3a2ca 347 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
8cc5b290
AP
348 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
349 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
1736855c 350 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
907a7cb5 351 { "merge-tree", cmd_merge_tree, RUN_SETUP },
112dd514 352 { "mktag", cmd_mktag, RUN_SETUP },
633e3556 353 { "mktree", cmd_mktree, RUN_SETUP },
7ae3df8c 354 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
efffea03 355 { "name-rev", cmd_name_rev, RUN_SETUP },
cd067d3b 356 { "notes", cmd_notes, RUN_SETUP },
efffea03 357 { "pack-objects", cmd_pack_objects, RUN_SETUP },
377d0276 358 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
dedc0ec5 359 { "patch-id", cmd_patch_id },
8951d7c1 360 { "peek-remote", cmd_ls_remote },
d97bc5de 361 { "pickaxe", cmd_blame, RUN_SETUP },
efffea03
JH
362 { "prune", cmd_prune, RUN_SETUP },
363 { "prune-packed", cmd_prune_packed, RUN_SETUP },
102cb085 364 { "push", cmd_push, RUN_SETUP },
efffea03 365 { "read-tree", cmd_read_tree, RUN_SETUP },
be5908ae 366 { "receive-pack", cmd_receive_pack },
4264dc15 367 { "reflog", cmd_reflog, RUN_SETUP },
211c8968 368 { "remote", cmd_remote, RUN_SETUP },
54b0c1e0 369 { "replace", cmd_replace, RUN_SETUP },
e0d10e1c 370 { "repo-config", cmd_config },
658f3650 371 { "rerere", cmd_rerere, RUN_SETUP },
0e5a7faa 372 { "reset", cmd_reset, RUN_SETUP },
efffea03 373 { "rev-list", cmd_rev_list, RUN_SETUP },
5410a02a 374 { "rev-parse", cmd_rev_parse },
7ae3df8c 375 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
271bb087 376 { "rm", cmd_rm, RUN_SETUP },
96249c04 377 { "send-pack", cmd_send_pack, RUN_SETUP },
abe549e1 378 { "shortlog", cmd_shortlog, USE_PAGER },
efffea03
JH
379 { "show-branch", cmd_show_branch, RUN_SETUP },
380 { "show", cmd_show, RUN_SETUP | USE_PAGER },
10762323 381 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
f754fa9c 382 { "stripspace", cmd_stripspace },
efffea03 383 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
62e09ce9 384 { "tag", cmd_tag, RUN_SETUP },
9cb90b80 385 { "tar-tree", cmd_tar_tree },
b5325818 386 { "unpack-file", cmd_unpack_file, RUN_SETUP },
efffea03
JH
387 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
388 { "update-index", cmd_update_index, RUN_SETUP },
389 { "update-ref", cmd_update_ref, RUN_SETUP },
53a1116c 390 { "update-server-info", cmd_update_server_info, RUN_SETUP },
39345a21 391 { "upload-archive", cmd_upload_archive },
55b6745d 392 { "var", cmd_var },
2ae68fcb 393 { "verify-tag", cmd_verify_tag, RUN_SETUP },
f754fa9c 394 { "version", cmd_version },
efffea03
JH
395 { "whatchanged", cmd_whatchanged, RUN_SETUP | USE_PAGER },
396 { "write-tree", cmd_write_tree, RUN_SETUP },
2e3ed670 397 { "verify-pack", cmd_verify_pack },
358ddb62 398 { "show-ref", cmd_show_ref, RUN_SETUP },
e1e22e37 399 { "pack-refs", cmd_pack_refs, RUN_SETUP },
231af832
LT
400 };
401 int i;
23326d14
JS
402 static const char ext[] = STRIP_EXTENSION;
403
404 if (sizeof(ext) > 1) {
405 i = strlen(argv[0]) - strlen(ext);
406 if (i > 0 && !strcmp(argv[0] + i, ext)) {
e8eec71d 407 char *argv0 = xstrdup(argv[0]);
23326d14
JS
408 argv[0] = cmd = argv0;
409 argv0[i] = '\0';
410 }
411 }
231af832 412
1cd95087
LT
413 /* Turn "git cmd --help" into "git help cmd" */
414 if (argc > 1 && !strcmp(argv[1], "--help")) {
415 argv[1] = argv[0];
416 argv[0] = cmd = "help";
417 }
418
231af832
LT
419 for (i = 0; i < ARRAY_SIZE(commands); i++) {
420 struct cmd_struct *p = commands+i;
421 if (strcmp(p->cmd, cmd))
422 continue;
f172f334 423 exit(run_builtin(p, argc, argv));
231af832
LT
424 }
425}
426
7550be0a
JH
427static void execv_dashed_external(const char **argv)
428{
f285a2d7 429 struct strbuf cmd = STRBUF_INIT;
7550be0a 430 const char *tmp;
d8e96fd8 431 int status;
7550be0a 432
030149a4
JN
433 commit_pager_choice();
434
7550be0a
JH
435 strbuf_addf(&cmd, "git-%s", argv[0]);
436
437 /*
438 * argv[0] must be the git command, but the argv array
439 * belongs to the caller, and may be reused in
440 * subsequent loop iterations. Save argv[0] and
441 * restore it on error.
442 */
443 tmp = argv[0];
444 argv[0] = cmd.buf;
445
446 trace_argv_printf(argv, "trace: exec:");
447
d8e96fd8
JK
448 /*
449 * if we fail because the command is not found, it is
450 * OK to return. Otherwise, we just pass along the status code.
451 */
c024beb5 452 status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE);
0ac77ec3 453 if (status >= 0 || errno != ENOENT)
5709e036 454 exit(status);
7550be0a
JH
455
456 argv[0] = tmp;
457
458 strbuf_release(&cmd);
459}
460
a907e1b6
AS
461static int run_argv(int *argcp, const char ***argv)
462{
463 int done_alias = 0;
464
465 while (1) {
466 /* See if it's an internal command */
467 handle_internal_command(*argcp, *argv);
468
469 /* .. then try the external ones */
470 execv_dashed_external(*argv);
471
472 /* It could be an alias -- this works around the insanity
473 * of overriding "git log" with "git show" by having
474 * alias.log = show
475 */
476 if (done_alias || !handle_alias(argcp, argv))
477 break;
478 done_alias = 1;
479 }
480
481 return done_alias;
482}
483
7550be0a 484
47d0b4ff 485int main(int argc, const char **argv)
8e49d503 486{
4dd47c3b 487 const char *cmd;
231af832 488
2cd72b0b
SP
489 cmd = git_extract_argv0_path(argv[0]);
490 if (!cmd)
4dd47c3b 491 cmd = "git-help";
8e49d503 492
231af832
LT
493 /*
494 * "git-xxxx" is the same as "git xxxx", but we obviously:
495 *
496 * - cannot take flags in between the "git" and the "xxxx".
497 * - cannot execute it externally (since it would just do
498 * the same thing over again)
499 *
500 * So we just directly call the internal command handler, and
501 * die if that one cannot handle it.
502 */
cc44c765 503 if (!prefixcmp(cmd, "git-")) {
231af832
LT
504 cmd += 4;
505 argv[0] = cmd;
47d0b4ff 506 handle_internal_command(argc, argv);
231af832
LT
507 die("cannot handle %s internally", cmd);
508 }
8e49d503 509
231af832 510 /* Look for flags.. */
6acbcb92
JS
511 argv++;
512 argc--;
4394efec 513 handle_options(&argv, &argc, NULL);
6acbcb92 514 if (argc > 0) {
cc44c765 515 if (!prefixcmp(argv[0], "--"))
6acbcb92
JS
516 argv[0] += 2;
517 } else {
3d7e2d85 518 /* The user didn't specify a command; give them help */
73e25e7c 519 commit_pager_choice();
3d7e2d85
SP
520 printf("usage: %s\n\n", git_usage_string);
521 list_common_cmds_help();
b7d96819 522 printf("\n%s\n", git_more_info_string);
3d7e2d85 523 exit(1);
97fc6c5f 524 }
6acbcb92 525 cmd = argv[0];
231af832
LT
526
527 /*
511707d4 528 * We use PATH to find git commands, but we prepend some higher
3ea3c215 529 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
511707d4
SP
530 * environment, and the $(gitexecdir) from the Makefile at build
531 * time.
231af832 532 */
e1464ca7 533 setup_path();
8e49d503 534
a025463b 535 while (1) {
a907e1b6
AS
536 static int done_help = 0;
537 static int was_alias = 0;
538 was_alias = run_argv(&argc, &argv);
539 if (errno != ENOENT)
a025463b 540 break;
a907e1b6 541 if (was_alias) {
f3dd015c 542 fprintf(stderr, "Expansion of alias '%s' failed; "
7283bbc7 543 "'%s' is not a git command\n",
f3dd015c
TT
544 cmd, argv[0]);
545 exit(1);
546 }
a907e1b6
AS
547 if (!done_help) {
548 cmd = argv[0] = help_unknown_cmd(cmd);
549 done_help = 1;
550 } else
551 break;
f3dd015c 552 }
10b15b86
AR
553
554 fprintf(stderr, "Failed to run command '%s': %s\n",
33ebb871 555 cmd, strerror(errno));
8e49d503
AE
556
557 return 1;
558}