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