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