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1 | #include "builtin.h" | |
2 | #include "config.h" | |
3 | #include "exec-cmd.h" | |
4 | #include "help.h" | |
5 | #include "run-command.h" | |
6 | #include "alias.h" | |
7 | ||
8 | #define RUN_SETUP (1<<0) | |
9 | #define RUN_SETUP_GENTLY (1<<1) | |
10 | #define USE_PAGER (1<<2) | |
11 | /* | |
12 | * require working tree to be present -- anything uses this needs | |
13 | * RUN_SETUP for reading from the configuration file. | |
14 | */ | |
15 | #define NEED_WORK_TREE (1<<3) | |
16 | #define SUPPORT_SUPER_PREFIX (1<<4) | |
17 | #define DELAY_PAGER_CONFIG (1<<5) | |
18 | #define NO_PARSEOPT (1<<6) /* parse-options is not used */ | |
19 | ||
20 | struct cmd_struct { | |
21 | const char *cmd; | |
22 | int (*fn)(int, const char **, const char *); | |
23 | unsigned int option; | |
24 | }; | |
25 | ||
26 | const char git_usage_string[] = | |
27 | N_("git [--version] [--help] [-C <path>] [-c <name>=<value>]\n" | |
28 | " [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n" | |
29 | " [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--bare]\n" | |
30 | " [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n" | |
31 | " <command> [<args>]"); | |
32 | ||
33 | const char git_more_info_string[] = | |
34 | N_("'git help -a' and 'git help -g' list available subcommands and some\n" | |
35 | "concept guides. See 'git help <command>' or 'git help <concept>'\n" | |
36 | "to read about a specific subcommand or concept.\n" | |
37 | "See 'git help git' for an overview of the system."); | |
38 | ||
39 | static int use_pager = -1; | |
40 | ||
41 | static void list_builtins(struct string_list *list, unsigned int exclude_option); | |
42 | ||
43 | static void exclude_helpers_from_list(struct string_list *list) | |
44 | { | |
45 | int i = 0; | |
46 | ||
47 | while (i < list->nr) { | |
48 | if (strstr(list->items[i].string, "--")) | |
49 | unsorted_string_list_delete_item(list, i, 0); | |
50 | else | |
51 | i++; | |
52 | } | |
53 | } | |
54 | ||
55 | static int match_token(const char *spec, int len, const char *token) | |
56 | { | |
57 | int token_len = strlen(token); | |
58 | ||
59 | return len == token_len && !strncmp(spec, token, token_len); | |
60 | } | |
61 | ||
62 | static int list_cmds(const char *spec) | |
63 | { | |
64 | struct string_list list = STRING_LIST_INIT_DUP; | |
65 | int i; | |
66 | int nongit; | |
67 | ||
68 | /* | |
69 | * Set up the repository so we can pick up any repo-level config (like | |
70 | * completion.commands). | |
71 | */ | |
72 | setup_git_directory_gently(&nongit); | |
73 | ||
74 | while (*spec) { | |
75 | const char *sep = strchrnul(spec, ','); | |
76 | int len = sep - spec; | |
77 | ||
78 | if (match_token(spec, len, "builtins")) | |
79 | list_builtins(&list, 0); | |
80 | else if (match_token(spec, len, "main")) | |
81 | list_all_main_cmds(&list); | |
82 | else if (match_token(spec, len, "others")) | |
83 | list_all_other_cmds(&list); | |
84 | else if (match_token(spec, len, "nohelpers")) | |
85 | exclude_helpers_from_list(&list); | |
86 | else if (match_token(spec, len, "alias")) | |
87 | list_aliases(&list); | |
88 | else if (match_token(spec, len, "config")) | |
89 | list_cmds_by_config(&list); | |
90 | else if (len > 5 && !strncmp(spec, "list-", 5)) { | |
91 | struct strbuf sb = STRBUF_INIT; | |
92 | ||
93 | strbuf_add(&sb, spec + 5, len - 5); | |
94 | list_cmds_by_category(&list, sb.buf); | |
95 | strbuf_release(&sb); | |
96 | } | |
97 | else | |
98 | die(_("unsupported command listing type '%s'"), spec); | |
99 | spec += len; | |
100 | if (*spec == ',') | |
101 | spec++; | |
102 | } | |
103 | for (i = 0; i < list.nr; i++) | |
104 | puts(list.items[i].string); | |
105 | string_list_clear(&list, 0); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static void commit_pager_choice(void) | |
110 | { | |
111 | switch (use_pager) { | |
112 | case 0: | |
113 | setenv("GIT_PAGER", "cat", 1); | |
114 | break; | |
115 | case 1: | |
116 | setup_pager(); | |
117 | break; | |
118 | default: | |
119 | break; | |
120 | } | |
121 | } | |
122 | ||
123 | void setup_auto_pager(const char *cmd, int def) | |
124 | { | |
125 | if (use_pager != -1 || pager_in_use()) | |
126 | return; | |
127 | use_pager = check_pager_config(cmd); | |
128 | if (use_pager == -1) | |
129 | use_pager = def; | |
130 | commit_pager_choice(); | |
131 | } | |
132 | ||
133 | static int handle_options(const char ***argv, int *argc, int *envchanged) | |
134 | { | |
135 | const char **orig_argv = *argv; | |
136 | ||
137 | while (*argc > 0) { | |
138 | const char *cmd = (*argv)[0]; | |
139 | if (cmd[0] != '-') | |
140 | break; | |
141 | ||
142 | /* | |
143 | * For legacy reasons, the "version" and "help" | |
144 | * commands can be written with "--" prepended | |
145 | * to make them look like flags. | |
146 | */ | |
147 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
148 | break; | |
149 | ||
150 | /* | |
151 | * Check remaining flags. | |
152 | */ | |
153 | if (skip_prefix(cmd, "--exec-path", &cmd)) { | |
154 | if (*cmd == '=') | |
155 | git_set_exec_path(cmd + 1); | |
156 | else { | |
157 | puts(git_exec_path()); | |
158 | trace2_cmd_name("_query_"); | |
159 | exit(0); | |
160 | } | |
161 | } else if (!strcmp(cmd, "--html-path")) { | |
162 | puts(system_path(GIT_HTML_PATH)); | |
163 | trace2_cmd_name("_query_"); | |
164 | exit(0); | |
165 | } else if (!strcmp(cmd, "--man-path")) { | |
166 | puts(system_path(GIT_MAN_PATH)); | |
167 | trace2_cmd_name("_query_"); | |
168 | exit(0); | |
169 | } else if (!strcmp(cmd, "--info-path")) { | |
170 | puts(system_path(GIT_INFO_PATH)); | |
171 | trace2_cmd_name("_query_"); | |
172 | exit(0); | |
173 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { | |
174 | use_pager = 1; | |
175 | } else if (!strcmp(cmd, "-P") || !strcmp(cmd, "--no-pager")) { | |
176 | use_pager = 0; | |
177 | if (envchanged) | |
178 | *envchanged = 1; | |
179 | } else if (!strcmp(cmd, "--no-replace-objects")) { | |
180 | read_replace_refs = 0; | |
181 | setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1); | |
182 | if (envchanged) | |
183 | *envchanged = 1; | |
184 | } else if (!strcmp(cmd, "--git-dir")) { | |
185 | if (*argc < 2) { | |
186 | fprintf(stderr, _("no directory given for --git-dir\n" )); | |
187 | usage(git_usage_string); | |
188 | } | |
189 | setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1); | |
190 | if (envchanged) | |
191 | *envchanged = 1; | |
192 | (*argv)++; | |
193 | (*argc)--; | |
194 | } else if (skip_prefix(cmd, "--git-dir=", &cmd)) { | |
195 | setenv(GIT_DIR_ENVIRONMENT, cmd, 1); | |
196 | if (envchanged) | |
197 | *envchanged = 1; | |
198 | } else if (!strcmp(cmd, "--namespace")) { | |
199 | if (*argc < 2) { | |
200 | fprintf(stderr, _("no namespace given for --namespace\n" )); | |
201 | usage(git_usage_string); | |
202 | } | |
203 | setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1); | |
204 | if (envchanged) | |
205 | *envchanged = 1; | |
206 | (*argv)++; | |
207 | (*argc)--; | |
208 | } else if (skip_prefix(cmd, "--namespace=", &cmd)) { | |
209 | setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1); | |
210 | if (envchanged) | |
211 | *envchanged = 1; | |
212 | } else if (!strcmp(cmd, "--work-tree")) { | |
213 | if (*argc < 2) { | |
214 | fprintf(stderr, _("no directory given for --work-tree\n" )); | |
215 | usage(git_usage_string); | |
216 | } | |
217 | setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1); | |
218 | if (envchanged) | |
219 | *envchanged = 1; | |
220 | (*argv)++; | |
221 | (*argc)--; | |
222 | } else if (skip_prefix(cmd, "--work-tree=", &cmd)) { | |
223 | setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1); | |
224 | if (envchanged) | |
225 | *envchanged = 1; | |
226 | } else if (!strcmp(cmd, "--super-prefix")) { | |
227 | if (*argc < 2) { | |
228 | fprintf(stderr, _("no prefix given for --super-prefix\n" )); | |
229 | usage(git_usage_string); | |
230 | } | |
231 | setenv(GIT_SUPER_PREFIX_ENVIRONMENT, (*argv)[1], 1); | |
232 | if (envchanged) | |
233 | *envchanged = 1; | |
234 | (*argv)++; | |
235 | (*argc)--; | |
236 | } else if (skip_prefix(cmd, "--super-prefix=", &cmd)) { | |
237 | setenv(GIT_SUPER_PREFIX_ENVIRONMENT, cmd, 1); | |
238 | if (envchanged) | |
239 | *envchanged = 1; | |
240 | } else if (!strcmp(cmd, "--bare")) { | |
241 | char *cwd = xgetcwd(); | |
242 | is_bare_repository_cfg = 1; | |
243 | setenv(GIT_DIR_ENVIRONMENT, cwd, 0); | |
244 | free(cwd); | |
245 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); | |
246 | if (envchanged) | |
247 | *envchanged = 1; | |
248 | } else if (!strcmp(cmd, "-c")) { | |
249 | if (*argc < 2) { | |
250 | fprintf(stderr, _("-c expects a configuration string\n" )); | |
251 | usage(git_usage_string); | |
252 | } | |
253 | git_config_push_parameter((*argv)[1]); | |
254 | (*argv)++; | |
255 | (*argc)--; | |
256 | } else if (!strcmp(cmd, "--literal-pathspecs")) { | |
257 | setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1); | |
258 | if (envchanged) | |
259 | *envchanged = 1; | |
260 | } else if (!strcmp(cmd, "--no-literal-pathspecs")) { | |
261 | setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1); | |
262 | if (envchanged) | |
263 | *envchanged = 1; | |
264 | } else if (!strcmp(cmd, "--glob-pathspecs")) { | |
265 | setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1); | |
266 | if (envchanged) | |
267 | *envchanged = 1; | |
268 | } else if (!strcmp(cmd, "--noglob-pathspecs")) { | |
269 | setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1); | |
270 | if (envchanged) | |
271 | *envchanged = 1; | |
272 | } else if (!strcmp(cmd, "--icase-pathspecs")) { | |
273 | setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1); | |
274 | if (envchanged) | |
275 | *envchanged = 1; | |
276 | } else if (!strcmp(cmd, "--no-optional-locks")) { | |
277 | setenv(GIT_OPTIONAL_LOCKS_ENVIRONMENT, "0", 1); | |
278 | if (envchanged) | |
279 | *envchanged = 1; | |
280 | } else if (!strcmp(cmd, "--shallow-file")) { | |
281 | (*argv)++; | |
282 | (*argc)--; | |
283 | set_alternate_shallow_file(the_repository, (*argv)[0], 1); | |
284 | if (envchanged) | |
285 | *envchanged = 1; | |
286 | } else if (!strcmp(cmd, "-C")) { | |
287 | if (*argc < 2) { | |
288 | fprintf(stderr, _("no directory given for -C\n" )); | |
289 | usage(git_usage_string); | |
290 | } | |
291 | if ((*argv)[1][0]) { | |
292 | if (chdir((*argv)[1])) | |
293 | die_errno("cannot change to '%s'", (*argv)[1]); | |
294 | if (envchanged) | |
295 | *envchanged = 1; | |
296 | } | |
297 | (*argv)++; | |
298 | (*argc)--; | |
299 | } else if (skip_prefix(cmd, "--list-cmds=", &cmd)) { | |
300 | trace2_cmd_name("_query_"); | |
301 | if (!strcmp(cmd, "parseopt")) { | |
302 | struct string_list list = STRING_LIST_INIT_DUP; | |
303 | int i; | |
304 | ||
305 | list_builtins(&list, NO_PARSEOPT); | |
306 | for (i = 0; i < list.nr; i++) | |
307 | printf("%s ", list.items[i].string); | |
308 | string_list_clear(&list, 0); | |
309 | exit(0); | |
310 | } else { | |
311 | exit(list_cmds(cmd)); | |
312 | } | |
313 | } else { | |
314 | fprintf(stderr, _("unknown option: %s\n"), cmd); | |
315 | usage(git_usage_string); | |
316 | } | |
317 | ||
318 | (*argv)++; | |
319 | (*argc)--; | |
320 | } | |
321 | return (*argv) - orig_argv; | |
322 | } | |
323 | ||
324 | static int handle_alias(int *argcp, const char ***argv) | |
325 | { | |
326 | int envchanged = 0, ret = 0, saved_errno = errno; | |
327 | int count, option_count; | |
328 | const char **new_argv; | |
329 | const char *alias_command; | |
330 | char *alias_string; | |
331 | ||
332 | alias_command = (*argv)[0]; | |
333 | alias_string = alias_lookup(alias_command); | |
334 | if (alias_string) { | |
335 | if (*argcp > 1 && !strcmp((*argv)[1], "-h")) | |
336 | fprintf_ln(stderr, _("'%s' is aliased to '%s'"), | |
337 | alias_command, alias_string); | |
338 | if (alias_string[0] == '!') { | |
339 | struct child_process child = CHILD_PROCESS_INIT; | |
340 | int nongit_ok; | |
341 | ||
342 | /* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */ | |
343 | setup_git_directory_gently(&nongit_ok); | |
344 | ||
345 | commit_pager_choice(); | |
346 | ||
347 | child.use_shell = 1; | |
348 | child.trace2_child_class = "shell_alias"; | |
349 | argv_array_push(&child.args, alias_string + 1); | |
350 | argv_array_pushv(&child.args, (*argv) + 1); | |
351 | ||
352 | trace2_cmd_alias(alias_command, child.args.argv); | |
353 | trace2_cmd_list_config(); | |
354 | trace2_cmd_name("_run_shell_alias_"); | |
355 | ||
356 | ret = run_command(&child); | |
357 | if (ret >= 0) /* normal exit */ | |
358 | exit(ret); | |
359 | ||
360 | die_errno(_("while expanding alias '%s': '%s'"), | |
361 | alias_command, alias_string + 1); | |
362 | } | |
363 | count = split_cmdline(alias_string, &new_argv); | |
364 | if (count < 0) | |
365 | die(_("bad alias.%s string: %s"), alias_command, | |
366 | _(split_cmdline_strerror(count))); | |
367 | option_count = handle_options(&new_argv, &count, &envchanged); | |
368 | if (envchanged) | |
369 | die(_("alias '%s' changes environment variables.\n" | |
370 | "You can use '!git' in the alias to do this"), | |
371 | alias_command); | |
372 | memmove(new_argv - option_count, new_argv, | |
373 | count * sizeof(char *)); | |
374 | new_argv -= option_count; | |
375 | ||
376 | if (count < 1) | |
377 | die(_("empty alias for %s"), alias_command); | |
378 | ||
379 | if (!strcmp(alias_command, new_argv[0])) | |
380 | die(_("recursive alias: %s"), alias_command); | |
381 | ||
382 | trace_argv_printf(new_argv, | |
383 | "trace: alias expansion: %s =>", | |
384 | alias_command); | |
385 | ||
386 | REALLOC_ARRAY(new_argv, count + *argcp); | |
387 | /* insert after command name */ | |
388 | memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp); | |
389 | ||
390 | trace2_cmd_alias(alias_command, new_argv); | |
391 | trace2_cmd_list_config(); | |
392 | ||
393 | *argv = new_argv; | |
394 | *argcp += count - 1; | |
395 | ||
396 | ret = 1; | |
397 | } | |
398 | ||
399 | errno = saved_errno; | |
400 | ||
401 | return ret; | |
402 | } | |
403 | ||
404 | static int run_builtin(struct cmd_struct *p, int argc, const char **argv) | |
405 | { | |
406 | int status, help; | |
407 | struct stat st; | |
408 | const char *prefix; | |
409 | ||
410 | prefix = NULL; | |
411 | help = argc == 2 && !strcmp(argv[1], "-h"); | |
412 | if (!help) { | |
413 | if (p->option & RUN_SETUP) | |
414 | prefix = setup_git_directory(); | |
415 | else if (p->option & RUN_SETUP_GENTLY) { | |
416 | int nongit_ok; | |
417 | prefix = setup_git_directory_gently(&nongit_ok); | |
418 | } | |
419 | ||
420 | if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY) && | |
421 | !(p->option & DELAY_PAGER_CONFIG)) | |
422 | use_pager = check_pager_config(p->cmd); | |
423 | if (use_pager == -1 && p->option & USE_PAGER) | |
424 | use_pager = 1; | |
425 | ||
426 | if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) && | |
427 | startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */ | |
428 | trace_repo_setup(prefix); | |
429 | } | |
430 | commit_pager_choice(); | |
431 | ||
432 | if (!help && get_super_prefix()) { | |
433 | if (!(p->option & SUPPORT_SUPER_PREFIX)) | |
434 | die(_("%s doesn't support --super-prefix"), p->cmd); | |
435 | } | |
436 | ||
437 | if (!help && p->option & NEED_WORK_TREE) | |
438 | setup_work_tree(); | |
439 | ||
440 | trace_argv_printf(argv, "trace: built-in: git"); | |
441 | trace2_cmd_name(p->cmd); | |
442 | trace2_cmd_list_config(); | |
443 | ||
444 | validate_cache_entries(the_repository->index); | |
445 | status = p->fn(argc, argv, prefix); | |
446 | validate_cache_entries(the_repository->index); | |
447 | ||
448 | if (status) | |
449 | return status; | |
450 | ||
451 | /* Somebody closed stdout? */ | |
452 | if (fstat(fileno(stdout), &st)) | |
453 | return 0; | |
454 | /* Ignore write errors for pipes and sockets.. */ | |
455 | if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) | |
456 | return 0; | |
457 | ||
458 | /* Check for ENOSPC and EIO errors.. */ | |
459 | if (fflush(stdout)) | |
460 | die_errno(_("write failure on standard output")); | |
461 | if (ferror(stdout)) | |
462 | die(_("unknown write failure on standard output")); | |
463 | if (fclose(stdout)) | |
464 | die_errno(_("close failed on standard output")); | |
465 | return 0; | |
466 | } | |
467 | ||
468 | static struct cmd_struct commands[] = { | |
469 | { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE }, | |
470 | { "am", cmd_am, RUN_SETUP | NEED_WORK_TREE }, | |
471 | { "annotate", cmd_annotate, RUN_SETUP | NO_PARSEOPT }, | |
472 | { "apply", cmd_apply, RUN_SETUP_GENTLY }, | |
473 | { "archive", cmd_archive, RUN_SETUP_GENTLY }, | |
474 | { "bisect--helper", cmd_bisect__helper, RUN_SETUP }, | |
475 | { "blame", cmd_blame, RUN_SETUP }, | |
476 | { "branch", cmd_branch, RUN_SETUP | DELAY_PAGER_CONFIG }, | |
477 | { "bundle", cmd_bundle, RUN_SETUP_GENTLY | NO_PARSEOPT }, | |
478 | { "cat-file", cmd_cat_file, RUN_SETUP }, | |
479 | { "check-attr", cmd_check_attr, RUN_SETUP }, | |
480 | { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE }, | |
481 | { "check-mailmap", cmd_check_mailmap, RUN_SETUP }, | |
482 | { "check-ref-format", cmd_check_ref_format, NO_PARSEOPT }, | |
483 | { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE }, | |
484 | { "checkout-index", cmd_checkout_index, | |
485 | RUN_SETUP | NEED_WORK_TREE}, | |
486 | { "cherry", cmd_cherry, RUN_SETUP }, | |
487 | { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE }, | |
488 | { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE }, | |
489 | { "clone", cmd_clone }, | |
490 | { "column", cmd_column, RUN_SETUP_GENTLY }, | |
491 | { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE }, | |
492 | { "commit-graph", cmd_commit_graph, RUN_SETUP }, | |
493 | { "commit-tree", cmd_commit_tree, RUN_SETUP | NO_PARSEOPT }, | |
494 | { "config", cmd_config, RUN_SETUP_GENTLY | DELAY_PAGER_CONFIG }, | |
495 | { "count-objects", cmd_count_objects, RUN_SETUP }, | |
496 | { "credential", cmd_credential, RUN_SETUP_GENTLY | NO_PARSEOPT }, | |
497 | { "describe", cmd_describe, RUN_SETUP }, | |
498 | { "diff", cmd_diff, NO_PARSEOPT }, | |
499 | { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT }, | |
500 | { "diff-index", cmd_diff_index, RUN_SETUP | NO_PARSEOPT }, | |
501 | { "diff-tree", cmd_diff_tree, RUN_SETUP | NO_PARSEOPT }, | |
502 | { "difftool", cmd_difftool, RUN_SETUP_GENTLY }, | |
503 | { "env--helper", cmd_env__helper }, | |
504 | { "fast-export", cmd_fast_export, RUN_SETUP }, | |
505 | { "fetch", cmd_fetch, RUN_SETUP }, | |
506 | { "fetch-pack", cmd_fetch_pack, RUN_SETUP | NO_PARSEOPT }, | |
507 | { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP }, | |
508 | { "for-each-ref", cmd_for_each_ref, RUN_SETUP }, | |
509 | { "format-patch", cmd_format_patch, RUN_SETUP }, | |
510 | { "fsck", cmd_fsck, RUN_SETUP }, | |
511 | { "fsck-objects", cmd_fsck, RUN_SETUP }, | |
512 | { "gc", cmd_gc, RUN_SETUP }, | |
513 | { "get-tar-commit-id", cmd_get_tar_commit_id, NO_PARSEOPT }, | |
514 | { "grep", cmd_grep, RUN_SETUP_GENTLY }, | |
515 | { "hash-object", cmd_hash_object }, | |
516 | { "help", cmd_help }, | |
517 | { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY | NO_PARSEOPT }, | |
518 | { "init", cmd_init_db }, | |
519 | { "init-db", cmd_init_db }, | |
520 | { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY }, | |
521 | { "log", cmd_log, RUN_SETUP }, | |
522 | { "ls-files", cmd_ls_files, RUN_SETUP }, | |
523 | { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY }, | |
524 | { "ls-tree", cmd_ls_tree, RUN_SETUP }, | |
525 | { "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY | NO_PARSEOPT }, | |
526 | { "mailsplit", cmd_mailsplit, NO_PARSEOPT }, | |
527 | { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE }, | |
528 | { "merge-base", cmd_merge_base, RUN_SETUP }, | |
529 | { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY }, | |
530 | { "merge-index", cmd_merge_index, RUN_SETUP | NO_PARSEOPT }, | |
531 | { "merge-ours", cmd_merge_ours, RUN_SETUP | NO_PARSEOPT }, | |
532 | { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT }, | |
533 | { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT }, | |
534 | { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT }, | |
535 | { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE | NO_PARSEOPT }, | |
536 | { "merge-tree", cmd_merge_tree, RUN_SETUP | NO_PARSEOPT }, | |
537 | { "mktag", cmd_mktag, RUN_SETUP | NO_PARSEOPT }, | |
538 | { "mktree", cmd_mktree, RUN_SETUP }, | |
539 | { "multi-pack-index", cmd_multi_pack_index, RUN_SETUP_GENTLY }, | |
540 | { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE }, | |
541 | { "name-rev", cmd_name_rev, RUN_SETUP }, | |
542 | { "notes", cmd_notes, RUN_SETUP }, | |
543 | { "pack-objects", cmd_pack_objects, RUN_SETUP }, | |
544 | { "pack-redundant", cmd_pack_redundant, RUN_SETUP | NO_PARSEOPT }, | |
545 | { "pack-refs", cmd_pack_refs, RUN_SETUP }, | |
546 | { "patch-id", cmd_patch_id, RUN_SETUP_GENTLY | NO_PARSEOPT }, | |
547 | { "pickaxe", cmd_blame, RUN_SETUP }, | |
548 | { "prune", cmd_prune, RUN_SETUP }, | |
549 | { "prune-packed", cmd_prune_packed, RUN_SETUP }, | |
550 | { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE }, | |
551 | { "push", cmd_push, RUN_SETUP }, | |
552 | { "range-diff", cmd_range_diff, RUN_SETUP | USE_PAGER }, | |
553 | { "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX}, | |
554 | { "rebase", cmd_rebase, RUN_SETUP | NEED_WORK_TREE }, | |
555 | { "rebase--interactive", cmd_rebase__interactive, RUN_SETUP | NEED_WORK_TREE }, | |
556 | { "receive-pack", cmd_receive_pack }, | |
557 | { "reflog", cmd_reflog, RUN_SETUP }, | |
558 | { "remote", cmd_remote, RUN_SETUP }, | |
559 | { "remote-ext", cmd_remote_ext, NO_PARSEOPT }, | |
560 | { "remote-fd", cmd_remote_fd, NO_PARSEOPT }, | |
561 | { "repack", cmd_repack, RUN_SETUP }, | |
562 | { "replace", cmd_replace, RUN_SETUP }, | |
563 | { "rerere", cmd_rerere, RUN_SETUP }, | |
564 | { "reset", cmd_reset, RUN_SETUP }, | |
565 | { "restore", cmd_restore, RUN_SETUP | NEED_WORK_TREE }, | |
566 | { "rev-list", cmd_rev_list, RUN_SETUP | NO_PARSEOPT }, | |
567 | { "rev-parse", cmd_rev_parse, NO_PARSEOPT }, | |
568 | { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE }, | |
569 | { "rm", cmd_rm, RUN_SETUP }, | |
570 | { "send-pack", cmd_send_pack, RUN_SETUP }, | |
571 | { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER }, | |
572 | { "show", cmd_show, RUN_SETUP }, | |
573 | { "show-branch", cmd_show_branch, RUN_SETUP }, | |
574 | { "show-index", cmd_show_index }, | |
575 | { "show-ref", cmd_show_ref, RUN_SETUP }, | |
576 | { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE }, | |
577 | /* | |
578 | * NEEDSWORK: Until the builtin stash is thoroughly robust and no | |
579 | * longer needs redirection to the stash shell script this is kept as | |
580 | * is, then should be changed to RUN_SETUP | NEED_WORK_TREE | |
581 | */ | |
582 | { "stash", cmd_stash }, | |
583 | { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE }, | |
584 | { "stripspace", cmd_stripspace }, | |
585 | { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX | NO_PARSEOPT }, | |
586 | { "switch", cmd_switch, RUN_SETUP | NEED_WORK_TREE }, | |
587 | { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP }, | |
588 | { "tag", cmd_tag, RUN_SETUP | DELAY_PAGER_CONFIG }, | |
589 | { "unpack-file", cmd_unpack_file, RUN_SETUP | NO_PARSEOPT }, | |
590 | { "unpack-objects", cmd_unpack_objects, RUN_SETUP | NO_PARSEOPT }, | |
591 | { "update-index", cmd_update_index, RUN_SETUP }, | |
592 | { "update-ref", cmd_update_ref, RUN_SETUP }, | |
593 | { "update-server-info", cmd_update_server_info, RUN_SETUP }, | |
594 | { "upload-archive", cmd_upload_archive, NO_PARSEOPT }, | |
595 | { "upload-archive--writer", cmd_upload_archive_writer, NO_PARSEOPT }, | |
596 | { "upload-pack", cmd_upload_pack }, | |
597 | { "var", cmd_var, RUN_SETUP_GENTLY | NO_PARSEOPT }, | |
598 | { "verify-commit", cmd_verify_commit, RUN_SETUP }, | |
599 | { "verify-pack", cmd_verify_pack }, | |
600 | { "verify-tag", cmd_verify_tag, RUN_SETUP }, | |
601 | { "version", cmd_version }, | |
602 | { "whatchanged", cmd_whatchanged, RUN_SETUP }, | |
603 | { "worktree", cmd_worktree, RUN_SETUP | NO_PARSEOPT }, | |
604 | { "write-tree", cmd_write_tree, RUN_SETUP }, | |
605 | }; | |
606 | ||
607 | static struct cmd_struct *get_builtin(const char *s) | |
608 | { | |
609 | int i; | |
610 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
611 | struct cmd_struct *p = commands + i; | |
612 | if (!strcmp(s, p->cmd)) | |
613 | return p; | |
614 | } | |
615 | return NULL; | |
616 | } | |
617 | ||
618 | int is_builtin(const char *s) | |
619 | { | |
620 | return !!get_builtin(s); | |
621 | } | |
622 | ||
623 | static void list_builtins(struct string_list *out, unsigned int exclude_option) | |
624 | { | |
625 | int i; | |
626 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
627 | if (exclude_option && | |
628 | (commands[i].option & exclude_option)) | |
629 | continue; | |
630 | string_list_append(out, commands[i].cmd); | |
631 | } | |
632 | } | |
633 | ||
634 | #ifdef STRIP_EXTENSION | |
635 | static void strip_extension(const char **argv) | |
636 | { | |
637 | size_t len; | |
638 | ||
639 | if (strip_suffix(argv[0], STRIP_EXTENSION, &len)) | |
640 | argv[0] = xmemdupz(argv[0], len); | |
641 | } | |
642 | #else | |
643 | #define strip_extension(cmd) | |
644 | #endif | |
645 | ||
646 | static void handle_builtin(int argc, const char **argv) | |
647 | { | |
648 | struct argv_array args = ARGV_ARRAY_INIT; | |
649 | const char *cmd; | |
650 | struct cmd_struct *builtin; | |
651 | ||
652 | strip_extension(argv); | |
653 | cmd = argv[0]; | |
654 | ||
655 | /* Turn "git cmd --help" into "git help --exclude-guides cmd" */ | |
656 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
657 | int i; | |
658 | ||
659 | argv[1] = argv[0]; | |
660 | argv[0] = cmd = "help"; | |
661 | ||
662 | for (i = 0; i < argc; i++) { | |
663 | argv_array_push(&args, argv[i]); | |
664 | if (!i) | |
665 | argv_array_push(&args, "--exclude-guides"); | |
666 | } | |
667 | ||
668 | argc++; | |
669 | argv = args.argv; | |
670 | } | |
671 | ||
672 | builtin = get_builtin(cmd); | |
673 | if (builtin) | |
674 | exit(run_builtin(builtin, argc, argv)); | |
675 | argv_array_clear(&args); | |
676 | } | |
677 | ||
678 | static void execv_dashed_external(const char **argv) | |
679 | { | |
680 | struct child_process cmd = CHILD_PROCESS_INIT; | |
681 | int status; | |
682 | ||
683 | if (get_super_prefix()) | |
684 | die(_("%s doesn't support --super-prefix"), argv[0]); | |
685 | ||
686 | if (use_pager == -1 && !is_builtin(argv[0])) | |
687 | use_pager = check_pager_config(argv[0]); | |
688 | commit_pager_choice(); | |
689 | ||
690 | argv_array_pushf(&cmd.args, "git-%s", argv[0]); | |
691 | argv_array_pushv(&cmd.args, argv + 1); | |
692 | cmd.clean_on_exit = 1; | |
693 | cmd.wait_after_clean = 1; | |
694 | cmd.silent_exec_failure = 1; | |
695 | cmd.trace2_child_class = "dashed"; | |
696 | ||
697 | trace2_cmd_name("_run_dashed_"); | |
698 | ||
699 | /* | |
700 | * The code in run_command() logs trace2 child_start/child_exit | |
701 | * events, so we do not need to report exec/exec_result events here. | |
702 | */ | |
703 | trace_argv_printf(cmd.args.argv, "trace: exec:"); | |
704 | ||
705 | /* | |
706 | * If we fail because the command is not found, it is | |
707 | * OK to return. Otherwise, we just pass along the status code, | |
708 | * or our usual generic code if we were not even able to exec | |
709 | * the program. | |
710 | */ | |
711 | status = run_command(&cmd); | |
712 | ||
713 | /* | |
714 | * If the child process ran and we are now going to exit, emit a | |
715 | * generic string as our trace2 command verb to indicate that we | |
716 | * launched a dashed command. | |
717 | */ | |
718 | if (status >= 0) | |
719 | exit(status); | |
720 | else if (errno != ENOENT) | |
721 | exit(128); | |
722 | } | |
723 | ||
724 | static int run_argv(int *argcp, const char ***argv) | |
725 | { | |
726 | int done_alias = 0; | |
727 | struct string_list cmd_list = STRING_LIST_INIT_NODUP; | |
728 | struct string_list_item *seen; | |
729 | ||
730 | while (1) { | |
731 | /* | |
732 | * If we tried alias and futzed with our environment, | |
733 | * it no longer is safe to invoke builtins directly in | |
734 | * general. We have to spawn them as dashed externals. | |
735 | * | |
736 | * NEEDSWORK: if we can figure out cases | |
737 | * where it is safe to do, we can avoid spawning a new | |
738 | * process. | |
739 | */ | |
740 | if (!done_alias) | |
741 | handle_builtin(*argcp, *argv); | |
742 | else if (get_builtin(**argv)) { | |
743 | struct argv_array args = ARGV_ARRAY_INIT; | |
744 | int i; | |
745 | ||
746 | /* | |
747 | * The current process is committed to launching a | |
748 | * child process to run the command named in (**argv) | |
749 | * and exiting. Log a generic string as the trace2 | |
750 | * command verb to indicate this. Note that the child | |
751 | * process will log the actual verb when it runs. | |
752 | */ | |
753 | trace2_cmd_name("_run_git_alias_"); | |
754 | ||
755 | if (get_super_prefix()) | |
756 | die("%s doesn't support --super-prefix", **argv); | |
757 | ||
758 | commit_pager_choice(); | |
759 | ||
760 | argv_array_push(&args, "git"); | |
761 | for (i = 0; i < *argcp; i++) | |
762 | argv_array_push(&args, (*argv)[i]); | |
763 | ||
764 | trace_argv_printf(args.argv, "trace: exec:"); | |
765 | ||
766 | /* | |
767 | * if we fail because the command is not found, it is | |
768 | * OK to return. Otherwise, we just pass along the status code. | |
769 | */ | |
770 | i = run_command_v_opt_tr2(args.argv, RUN_SILENT_EXEC_FAILURE | | |
771 | RUN_CLEAN_ON_EXIT, "git_alias"); | |
772 | if (i >= 0 || errno != ENOENT) | |
773 | exit(i); | |
774 | die("could not execute builtin %s", **argv); | |
775 | } | |
776 | ||
777 | /* .. then try the external ones */ | |
778 | execv_dashed_external(*argv); | |
779 | ||
780 | seen = unsorted_string_list_lookup(&cmd_list, *argv[0]); | |
781 | if (seen) { | |
782 | int i; | |
783 | struct strbuf sb = STRBUF_INIT; | |
784 | for (i = 0; i < cmd_list.nr; i++) { | |
785 | struct string_list_item *item = &cmd_list.items[i]; | |
786 | ||
787 | strbuf_addf(&sb, "\n %s", item->string); | |
788 | if (item == seen) | |
789 | strbuf_addstr(&sb, " <=="); | |
790 | else if (i == cmd_list.nr - 1) | |
791 | strbuf_addstr(&sb, " ==>"); | |
792 | } | |
793 | die(_("alias loop detected: expansion of '%s' does" | |
794 | " not terminate:%s"), cmd_list.items[0].string, sb.buf); | |
795 | } | |
796 | ||
797 | string_list_append(&cmd_list, *argv[0]); | |
798 | ||
799 | /* | |
800 | * It could be an alias -- this works around the insanity | |
801 | * of overriding "git log" with "git show" by having | |
802 | * alias.log = show | |
803 | */ | |
804 | if (!handle_alias(argcp, argv)) | |
805 | break; | |
806 | done_alias = 1; | |
807 | } | |
808 | ||
809 | string_list_clear(&cmd_list, 0); | |
810 | ||
811 | return done_alias; | |
812 | } | |
813 | ||
814 | int cmd_main(int argc, const char **argv) | |
815 | { | |
816 | const char *cmd; | |
817 | int done_help = 0; | |
818 | ||
819 | cmd = argv[0]; | |
820 | if (!cmd) | |
821 | cmd = "git-help"; | |
822 | else { | |
823 | const char *slash = find_last_dir_sep(cmd); | |
824 | if (slash) | |
825 | cmd = slash + 1; | |
826 | } | |
827 | ||
828 | trace_command_performance(argv); | |
829 | ||
830 | /* | |
831 | * "git-xxxx" is the same as "git xxxx", but we obviously: | |
832 | * | |
833 | * - cannot take flags in between the "git" and the "xxxx". | |
834 | * - cannot execute it externally (since it would just do | |
835 | * the same thing over again) | |
836 | * | |
837 | * So we just directly call the builtin handler, and die if | |
838 | * that one cannot handle it. | |
839 | */ | |
840 | if (skip_prefix(cmd, "git-", &cmd)) { | |
841 | argv[0] = cmd; | |
842 | handle_builtin(argc, argv); | |
843 | die(_("cannot handle %s as a builtin"), cmd); | |
844 | } | |
845 | ||
846 | /* Look for flags.. */ | |
847 | argv++; | |
848 | argc--; | |
849 | handle_options(&argv, &argc, NULL); | |
850 | if (argc > 0) { | |
851 | /* translate --help and --version into commands */ | |
852 | skip_prefix(argv[0], "--", &argv[0]); | |
853 | } else { | |
854 | /* The user didn't specify a command; give them help */ | |
855 | commit_pager_choice(); | |
856 | printf(_("usage: %s\n\n"), git_usage_string); | |
857 | list_common_cmds_help(); | |
858 | printf("\n%s\n", _(git_more_info_string)); | |
859 | exit(1); | |
860 | } | |
861 | cmd = argv[0]; | |
862 | ||
863 | /* | |
864 | * We use PATH to find git commands, but we prepend some higher | |
865 | * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH | |
866 | * environment, and the $(gitexecdir) from the Makefile at build | |
867 | * time. | |
868 | */ | |
869 | setup_path(); | |
870 | ||
871 | while (1) { | |
872 | int was_alias = run_argv(&argc, &argv); | |
873 | if (errno != ENOENT) | |
874 | break; | |
875 | if (was_alias) { | |
876 | fprintf(stderr, _("expansion of alias '%s' failed; " | |
877 | "'%s' is not a git command\n"), | |
878 | cmd, argv[0]); | |
879 | exit(1); | |
880 | } | |
881 | if (!done_help) { | |
882 | cmd = argv[0] = help_unknown_cmd(cmd); | |
883 | done_help = 1; | |
884 | } else | |
885 | break; | |
886 | } | |
887 | ||
888 | fprintf(stderr, _("failed to run command '%s': %s\n"), | |
889 | cmd, strerror(errno)); | |
890 | ||
891 | return 1; | |
892 | } |