Fix 'git log' early pager startup error case
[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"
293b07f1
TR
11 " [-c name=value] [--help]\n"
12 " 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
82cd8358
FL
58 if (!getenv("GIT_ASKPASS") && getenv("SSH_ASKPASS"))
59 setenv("GIT_ASKPASS", getenv("SSH_ASKPASS"), 1);
60
4ab243a9
JS
61 while (*argc > 0) {
62 const char *cmd = (*argv)[0];
63 if (cmd[0] != '-')
64 break;
65
6acbcb92
JS
66 /*
67 * For legacy reasons, the "version" and "help"
68 * commands can be written with "--" prepended
69 * to make them look like flags.
70 */
71 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
72 break;
73
74 /*
75 * Check remaining flags.
76 */
cc44c765 77 if (!prefixcmp(cmd, "--exec-path")) {
6acbcb92
JS
78 cmd += 11;
79 if (*cmd == '=')
384df833 80 git_set_argv_exec_path(cmd + 1);
6acbcb92
JS
81 else {
82 puts(git_exec_path());
83 exit(0);
84 }
89a56bfb
MH
85 } else if (!strcmp(cmd, "--html-path")) {
86 puts(system_path(GIT_HTML_PATH));
87 exit(0);
6acbcb92 88 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
4e10738a 89 use_pager = 1;
463a849d 90 } else if (!strcmp(cmd, "--no-pager")) {
4e10738a 91 use_pager = 0;
463a849d
MM
92 if (envchanged)
93 *envchanged = 1;
b0fa7ab5
CC
94 } else if (!strcmp(cmd, "--no-replace-objects")) {
95 read_replace_refs = 0;
6476b38b
CC
96 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
97 if (envchanged)
98 *envchanged = 1;
6acbcb92 99 } else if (!strcmp(cmd, "--git-dir")) {
c321f00d
BG
100 if (*argc < 2) {
101 fprintf(stderr, "No directory given for --git-dir.\n" );
102 usage(git_usage_string);
103 }
45b09794 104 setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
105 if (envchanged)
106 *envchanged = 1;
6acbcb92
JS
107 (*argv)++;
108 (*argc)--;
e4b02333 109 handled++;
cc44c765 110 } else if (!prefixcmp(cmd, "--git-dir=")) {
45b09794 111 setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1);
4394efec
ML
112 if (envchanged)
113 *envchanged = 1;
892c41b9
ML
114 } else if (!strcmp(cmd, "--work-tree")) {
115 if (*argc < 2) {
116 fprintf(stderr, "No directory given for --work-tree.\n" );
117 usage(git_usage_string);
118 }
119 setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
4394efec
ML
120 if (envchanged)
121 *envchanged = 1;
892c41b9
ML
122 (*argv)++;
123 (*argc)--;
124 } else if (!prefixcmp(cmd, "--work-tree=")) {
125 setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
4394efec
ML
126 if (envchanged)
127 *envchanged = 1;
6acbcb92 128 } else if (!strcmp(cmd, "--bare")) {
ef5ddb2f 129 static char git_dir[PATH_MAX+1];
6adcca3f 130 is_bare_repository_cfg = 1;
9277d602 131 setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
4394efec
ML
132 if (envchanged)
133 *envchanged = 1;
8b1fa778
AR
134 } else if (!strcmp(cmd, "-c")) {
135 if (*argc < 2) {
136 fprintf(stderr, "-c expects a configuration string\n" );
137 usage(git_usage_string);
138 }
139 git_config_parse_parameter((*argv)[1]);
140 (*argv)++;
141 (*argc)--;
6acbcb92
JS
142 } else {
143 fprintf(stderr, "Unknown option: %s\n", cmd);
822a7d50 144 usage(git_usage_string);
6acbcb92 145 }
4ab243a9
JS
146
147 (*argv)++;
148 (*argc)--;
149 handled++;
150 }
151 return handled;
152}
153
2b11e317
JS
154static int handle_alias(int *argcp, const char ***argv)
155{
af05d679 156 int envchanged = 0, ret = 0, saved_errno = errno;
2b11e317 157 const char *subdir;
0347a8c7 158 int count, option_count;
4b25d091 159 const char **new_argv;
94351118
JK
160 const char *alias_command;
161 char *alias_string;
e85dc0a3 162 int unused_nongit;
2b11e317 163
e85dc0a3 164 subdir = setup_git_directory_gently(&unused_nongit);
0347a8c7
ML
165
166 alias_command = (*argv)[0];
94351118 167 alias_string = alias_lookup(alias_command);
0347a8c7 168 if (alias_string) {
dfd42a3c 169 if (alias_string[0] == '!') {
030149a4 170 commit_pager_choice();
a2f8028d 171 if (*argcp > 1) {
7a33bcbe 172 struct strbuf buf;
a2f8028d 173
7a33bcbe
PH
174 strbuf_init(&buf, PATH_MAX);
175 strbuf_addstr(&buf, alias_string);
b319ce4c 176 sq_quote_argv(&buf, (*argv) + 1, PATH_MAX);
a2f8028d 177 free(alias_string);
7a33bcbe 178 alias_string = buf.buf;
a2f8028d 179 }
dfd42a3c
TT
180 trace_printf("trace: alias to shell cmd: %s => %s\n",
181 alias_command, alias_string + 1);
182 ret = system(alias_string + 1);
183 if (ret >= 0 && WIFEXITED(ret) &&
184 WEXITSTATUS(ret) != 127)
185 exit(WEXITSTATUS(ret));
d7530708 186 die("Failed to run '%s' when expanding alias '%s'",
dfd42a3c
TT
187 alias_string + 1, alias_command);
188 }
0347a8c7 189 count = split_cmdline(alias_string, &new_argv);
dc4179f9
DM
190 if (count < 0)
191 die("Bad alias.%s string", alias_command);
4394efec
ML
192 option_count = handle_options(&new_argv, &count, &envchanged);
193 if (envchanged)
194 die("alias '%s' changes environment variables\n"
195 "You can use '!git' in the alias to do this.",
196 alias_command);
0347a8c7
ML
197 memmove(new_argv - option_count, new_argv,
198 count * sizeof(char *));
199 new_argv -= option_count;
200
201 if (count < 1)
202 die("empty alias for %s", alias_command);
203
204 if (!strcmp(alias_command, new_argv[0]))
205 die("recursive alias: %s", alias_command);
206
b319ce4c 207 trace_argv_printf(new_argv,
6ce4e61f
CC
208 "trace: alias expansion: %s =>",
209 alias_command);
575ba9d6 210
4b25d091 211 new_argv = xrealloc(new_argv, sizeof(char *) *
6167c136 212 (count + *argcp));
0347a8c7 213 /* insert after command name */
4b25d091 214 memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
2b11e317 215
0347a8c7
ML
216 *argv = new_argv;
217 *argcp += count - 1;
2b11e317 218
0347a8c7 219 ret = 1;
2b11e317
JS
220 }
221
7be77de2 222 if (subdir && chdir(subdir))
d824cbba 223 die_errno("Cannot change to '%s'", subdir);
2b11e317 224
47e5c0ca
JS
225 errno = saved_errno;
226
2b11e317
JS
227 return ret;
228}
229
70827b15 230const char git_version_string[] = GIT_VERSION;
5b84f4d8 231
efffea03
JH
232#define RUN_SETUP (1<<0)
233#define USE_PAGER (1<<1)
7eff28a9
SP
234/*
235 * require working tree to be present -- anything uses this needs
236 * RUN_SETUP for reading from the configuration file.
237 */
7ae3df8c 238#define NEED_WORK_TREE (1<<2)
a633fca0 239
47d0b4ff
LT
240struct cmd_struct {
241 const char *cmd;
242 int (*fn)(int, const char **, const char *);
243 int option;
244};
245
f172f334 246static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
47d0b4ff 247{
99caeed0 248 int status, help;
0f157315 249 struct stat st;
47d0b4ff
LT
250 const char *prefix;
251
252 prefix = NULL;
99caeed0
JN
253 help = argc == 2 && !strcmp(argv[1], "-h");
254 if (!help) {
255 if (p->option & RUN_SETUP)
256 prefix = setup_git_directory();
257
258 if (use_pager == -1 && p->option & RUN_SETUP)
259 use_pager = check_pager_config(p->cmd);
260 if (use_pager == -1 && p->option & USE_PAGER)
261 use_pager = 1;
262 }
4e10738a
JK
263 commit_pager_choice();
264
99caeed0 265 if (!help && p->option & NEED_WORK_TREE)
59f0f2f3
MH
266 setup_work_tree();
267
b319ce4c 268 trace_argv_printf(argv, "trace: built-in: git");
47d0b4ff 269
0f157315
LT
270 status = p->fn(argc, argv, prefix);
271 if (status)
47e3de0e 272 return status;
0f157315
LT
273
274 /* Somebody closed stdout? */
275 if (fstat(fileno(stdout), &st))
276 return 0;
277 /* Ignore write errors for pipes and sockets.. */
278 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
279 return 0;
280
281 /* Check for ENOSPC and EIO errors.. */
0227f988 282 if (fflush(stdout))
d824cbba 283 die_errno("write failure on standard output");
0227f988
LT
284 if (ferror(stdout))
285 die("unknown write failure on standard output");
286 if (fclose(stdout))
d824cbba 287 die_errno("close failed on standard output");
0f157315 288 return 0;
47d0b4ff
LT
289}
290
291static void handle_internal_command(int argc, const char **argv)
231af832
LT
292{
293 const char *cmd = argv[0];
47d0b4ff 294 static struct cmd_struct commands[] = {
7ae3df8c 295 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
11920d28 296 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
d97bc5de 297 { "annotate", cmd_annotate, RUN_SETUP },
f754fa9c 298 { "apply", cmd_apply },
265d5280 299 { "archive", cmd_archive },
1bf072e3 300 { "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE },
4f0219a4 301 { "blame", cmd_blame, RUN_SETUP },
1da1b3a3 302 { "branch", cmd_branch, RUN_SETUP },
2e0afafe 303 { "bundle", cmd_bundle },
efffea03 304 { "cat-file", cmd_cat_file, RUN_SETUP },
782c2d65 305 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
4465f410
JS
306 { "checkout-index", cmd_checkout_index,
307 RUN_SETUP | NEED_WORK_TREE},
0864f264 308 { "check-ref-format", cmd_check_ref_format },
2d35d556 309 { "check-attr", cmd_check_attr, RUN_SETUP },
e827633a 310 { "cherry", cmd_cherry, RUN_SETUP },
7ae3df8c 311 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
8434c2f1 312 { "clone", cmd_clone },
113f10f2 313 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
f5bbc322 314 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
efffea03 315 { "commit-tree", cmd_commit_tree, RUN_SETUP },
e0d10e1c 316 { "config", cmd_config },
8112894d 317 { "count-objects", cmd_count_objects, RUN_SETUP },
9a0eaf83 318 { "describe", cmd_describe, RUN_SETUP },
89d07f75 319 { "diff", cmd_diff },
4f38f6b5 320 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
efffea03 321 { "diff-index", cmd_diff_index, RUN_SETUP },
efffea03 322 { "diff-tree", cmd_diff_tree, RUN_SETUP },
f2dc849e 323 { "fast-export", cmd_fast_export, RUN_SETUP },
b888d61c 324 { "fetch", cmd_fetch, RUN_SETUP },
2d4177c0 325 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
efffea03 326 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
9f613ddd 327 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
efffea03 328 { "format-patch", cmd_format_patch, RUN_SETUP },
b4dfefe0
MW
329 { "fsck", cmd_fsck, RUN_SETUP },
330 { "fsck-objects", cmd_fsck, RUN_SETUP },
6757ada4 331 { "gc", cmd_gc, RUN_SETUP },
f754fa9c 332 { "get-tar-commit-id", cmd_get_tar_commit_id },
678e484b 333 { "grep", cmd_grep },
b28a1ce0 334 { "hash-object", cmd_hash_object },
f754fa9c 335 { "help", cmd_help },
3bb72562 336 { "index-pack", cmd_index_pack },
515377ea 337 { "init", cmd_init_db },
f754fa9c 338 { "init-db", cmd_init_db },
1fda91b5 339 { "log", cmd_log, RUN_SETUP },
efffea03
JH
340 { "ls-files", cmd_ls_files, RUN_SETUP },
341 { "ls-tree", cmd_ls_tree, RUN_SETUP },
8951d7c1 342 { "ls-remote", cmd_ls_remote },
f754fa9c
JH
343 { "mailinfo", cmd_mailinfo },
344 { "mailsplit", cmd_mailsplit },
1c7b76be 345 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
71dfbf22 346 { "merge-base", cmd_merge_base, RUN_SETUP },
ba1f5f35 347 { "merge-file", cmd_merge_file },
0ecace72 348 { "merge-index", cmd_merge_index, RUN_SETUP },
a00a42ae 349 { "merge-ours", cmd_merge_ours, RUN_SETUP },
e1b3a2ca 350 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
8cc5b290
AP
351 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
352 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
1736855c 353 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
907a7cb5 354 { "merge-tree", cmd_merge_tree, RUN_SETUP },
112dd514 355 { "mktag", cmd_mktag, RUN_SETUP },
633e3556 356 { "mktree", cmd_mktree, RUN_SETUP },
7ae3df8c 357 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
efffea03 358 { "name-rev", cmd_name_rev, RUN_SETUP },
cd067d3b 359 { "notes", cmd_notes, RUN_SETUP },
efffea03 360 { "pack-objects", cmd_pack_objects, RUN_SETUP },
377d0276 361 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
dedc0ec5 362 { "patch-id", cmd_patch_id },
8951d7c1 363 { "peek-remote", cmd_ls_remote },
d97bc5de 364 { "pickaxe", cmd_blame, RUN_SETUP },
efffea03
JH
365 { "prune", cmd_prune, RUN_SETUP },
366 { "prune-packed", cmd_prune_packed, RUN_SETUP },
102cb085 367 { "push", cmd_push, RUN_SETUP },
efffea03 368 { "read-tree", cmd_read_tree, RUN_SETUP },
be5908ae 369 { "receive-pack", cmd_receive_pack },
4264dc15 370 { "reflog", cmd_reflog, RUN_SETUP },
211c8968 371 { "remote", cmd_remote, RUN_SETUP },
54b0c1e0 372 { "replace", cmd_replace, RUN_SETUP },
e0d10e1c 373 { "repo-config", cmd_config },
658f3650 374 { "rerere", cmd_rerere, RUN_SETUP },
0e5a7faa 375 { "reset", cmd_reset, RUN_SETUP },
efffea03 376 { "rev-list", cmd_rev_list, RUN_SETUP },
5410a02a 377 { "rev-parse", cmd_rev_parse },
7ae3df8c 378 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
271bb087 379 { "rm", cmd_rm, RUN_SETUP },
96249c04 380 { "send-pack", cmd_send_pack, RUN_SETUP },
abe549e1 381 { "shortlog", cmd_shortlog, USE_PAGER },
efffea03 382 { "show-branch", cmd_show_branch, RUN_SETUP },
1fda91b5 383 { "show", cmd_show, RUN_SETUP },
10762323 384 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
f754fa9c 385 { "stripspace", cmd_stripspace },
efffea03 386 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
62e09ce9 387 { "tag", cmd_tag, RUN_SETUP },
9cb90b80 388 { "tar-tree", cmd_tar_tree },
b5325818 389 { "unpack-file", cmd_unpack_file, RUN_SETUP },
efffea03
JH
390 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
391 { "update-index", cmd_update_index, RUN_SETUP },
392 { "update-ref", cmd_update_ref, RUN_SETUP },
53a1116c 393 { "update-server-info", cmd_update_server_info, RUN_SETUP },
39345a21 394 { "upload-archive", cmd_upload_archive },
55b6745d 395 { "var", cmd_var },
2ae68fcb 396 { "verify-tag", cmd_verify_tag, RUN_SETUP },
f754fa9c 397 { "version", cmd_version },
1fda91b5 398 { "whatchanged", cmd_whatchanged, RUN_SETUP },
efffea03 399 { "write-tree", cmd_write_tree, RUN_SETUP },
2e3ed670 400 { "verify-pack", cmd_verify_pack },
358ddb62 401 { "show-ref", cmd_show_ref, RUN_SETUP },
e1e22e37 402 { "pack-refs", cmd_pack_refs, RUN_SETUP },
231af832
LT
403 };
404 int i;
23326d14
JS
405 static const char ext[] = STRIP_EXTENSION;
406
407 if (sizeof(ext) > 1) {
408 i = strlen(argv[0]) - strlen(ext);
409 if (i > 0 && !strcmp(argv[0] + i, ext)) {
e8eec71d 410 char *argv0 = xstrdup(argv[0]);
23326d14
JS
411 argv[0] = cmd = argv0;
412 argv0[i] = '\0';
413 }
414 }
231af832 415
1cd95087
LT
416 /* Turn "git cmd --help" into "git help cmd" */
417 if (argc > 1 && !strcmp(argv[1], "--help")) {
418 argv[1] = argv[0];
419 argv[0] = cmd = "help";
420 }
421
231af832
LT
422 for (i = 0; i < ARRAY_SIZE(commands); i++) {
423 struct cmd_struct *p = commands+i;
424 if (strcmp(p->cmd, cmd))
425 continue;
f172f334 426 exit(run_builtin(p, argc, argv));
231af832
LT
427 }
428}
429
7550be0a
JH
430static void execv_dashed_external(const char **argv)
431{
f285a2d7 432 struct strbuf cmd = STRBUF_INIT;
7550be0a 433 const char *tmp;
d8e96fd8 434 int status;
7550be0a 435
030149a4
JN
436 commit_pager_choice();
437
7550be0a
JH
438 strbuf_addf(&cmd, "git-%s", argv[0]);
439
440 /*
441 * argv[0] must be the git command, but the argv array
442 * belongs to the caller, and may be reused in
443 * subsequent loop iterations. Save argv[0] and
444 * restore it on error.
445 */
446 tmp = argv[0];
447 argv[0] = cmd.buf;
448
449 trace_argv_printf(argv, "trace: exec:");
450
d8e96fd8
JK
451 /*
452 * if we fail because the command is not found, it is
453 * OK to return. Otherwise, we just pass along the status code.
454 */
c024beb5 455 status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE);
0ac77ec3 456 if (status >= 0 || errno != ENOENT)
5709e036 457 exit(status);
7550be0a
JH
458
459 argv[0] = tmp;
460
461 strbuf_release(&cmd);
462}
463
a907e1b6
AS
464static int run_argv(int *argcp, const char ***argv)
465{
466 int done_alias = 0;
467
468 while (1) {
469 /* See if it's an internal command */
470 handle_internal_command(*argcp, *argv);
471
472 /* .. then try the external ones */
473 execv_dashed_external(*argv);
474
475 /* It could be an alias -- this works around the insanity
476 * of overriding "git log" with "git show" by having
477 * alias.log = show
478 */
479 if (done_alias || !handle_alias(argcp, argv))
480 break;
481 done_alias = 1;
482 }
483
484 return done_alias;
485}
486
7550be0a 487
47d0b4ff 488int main(int argc, const char **argv)
8e49d503 489{
4dd47c3b 490 const char *cmd;
231af832 491
2cd72b0b
SP
492 cmd = git_extract_argv0_path(argv[0]);
493 if (!cmd)
4dd47c3b 494 cmd = "git-help";
8e49d503 495
231af832
LT
496 /*
497 * "git-xxxx" is the same as "git xxxx", but we obviously:
498 *
499 * - cannot take flags in between the "git" and the "xxxx".
500 * - cannot execute it externally (since it would just do
501 * the same thing over again)
502 *
503 * So we just directly call the internal command handler, and
504 * die if that one cannot handle it.
505 */
cc44c765 506 if (!prefixcmp(cmd, "git-")) {
231af832
LT
507 cmd += 4;
508 argv[0] = cmd;
47d0b4ff 509 handle_internal_command(argc, argv);
231af832
LT
510 die("cannot handle %s internally", cmd);
511 }
8e49d503 512
231af832 513 /* Look for flags.. */
6acbcb92
JS
514 argv++;
515 argc--;
4394efec 516 handle_options(&argv, &argc, NULL);
6acbcb92 517 if (argc > 0) {
cc44c765 518 if (!prefixcmp(argv[0], "--"))
6acbcb92
JS
519 argv[0] += 2;
520 } else {
3d7e2d85 521 /* The user didn't specify a command; give them help */
73e25e7c 522 commit_pager_choice();
3d7e2d85
SP
523 printf("usage: %s\n\n", git_usage_string);
524 list_common_cmds_help();
b7d96819 525 printf("\n%s\n", git_more_info_string);
3d7e2d85 526 exit(1);
97fc6c5f 527 }
6acbcb92 528 cmd = argv[0];
231af832
LT
529
530 /*
511707d4 531 * We use PATH to find git commands, but we prepend some higher
3ea3c215 532 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
511707d4
SP
533 * environment, and the $(gitexecdir) from the Makefile at build
534 * time.
231af832 535 */
e1464ca7 536 setup_path();
8e49d503 537
a025463b 538 while (1) {
a907e1b6
AS
539 static int done_help = 0;
540 static int was_alias = 0;
541 was_alias = run_argv(&argc, &argv);
542 if (errno != ENOENT)
a025463b 543 break;
a907e1b6 544 if (was_alias) {
f3dd015c 545 fprintf(stderr, "Expansion of alias '%s' failed; "
7283bbc7 546 "'%s' is not a git command\n",
f3dd015c
TT
547 cmd, argv[0]);
548 exit(1);
549 }
a907e1b6
AS
550 if (!done_help) {
551 cmd = argv[0] = help_unknown_cmd(cmd);
552 done_help = 1;
553 } else
554 break;
f3dd015c 555 }
10b15b86
AR
556
557 fprintf(stderr, "Failed to run command '%s': %s\n",
33ebb871 558 cmd, strerror(errno));
8e49d503
AE
559
560 return 1;
561}