6 #include "run-command.h"
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]\n"
11 " [--bare] [--git-dir=<path>] [--work-tree=<path>]\n"
12 " [-c name=value] [--help]\n"
13 " <command> [<args>]";
15 const char git_more_info_string
[] =
16 "See 'git help <command>' for more information on a specific command.";
18 static struct startup_info git_startup_info
;
19 static int use_pager
= -1;
26 static int pager_command_config(const char *var
, const char *value
, void *data
)
28 struct pager_config
*c
= data
;
29 if (!prefixcmp(var
, "pager.") && !strcmp(var
+ 6, c
->cmd
)) {
30 int b
= git_config_maybe_bool(var
, value
);
35 c
->value
= xstrdup(value
);
41 /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
42 int check_pager_config(const char *cmd
)
44 struct pager_config c
;
48 git_config(pager_command_config
, &c
);
50 pager_program
= c
.value
;
54 static void commit_pager_choice(void) {
57 setenv("GIT_PAGER", "cat", 1);
67 static int handle_options(const char ***argv
, int *argc
, int *envchanged
)
69 const char **orig_argv
= *argv
;
72 const char *cmd
= (*argv
)[0];
77 * For legacy reasons, the "version" and "help"
78 * commands can be written with "--" prepended
79 * to make them look like flags.
81 if (!strcmp(cmd
, "--help") || !strcmp(cmd
, "--version"))
85 * Check remaining flags.
87 if (!prefixcmp(cmd
, "--exec-path")) {
90 git_set_argv_exec_path(cmd
+ 1);
92 puts(git_exec_path());
95 } else if (!strcmp(cmd
, "--html-path")) {
96 puts(system_path(GIT_HTML_PATH
));
98 } else if (!strcmp(cmd
, "--man-path")) {
99 puts(system_path(GIT_MAN_PATH
));
101 } else if (!strcmp(cmd
, "--info-path")) {
102 puts(system_path(GIT_INFO_PATH
));
104 } else if (!strcmp(cmd
, "-p") || !strcmp(cmd
, "--paginate")) {
106 } else if (!strcmp(cmd
, "--no-pager")) {
110 } else if (!strcmp(cmd
, "--no-replace-objects")) {
111 read_replace_refs
= 0;
112 setenv(NO_REPLACE_OBJECTS_ENVIRONMENT
, "1", 1);
115 } else if (!strcmp(cmd
, "--git-dir")) {
117 fprintf(stderr
, "No directory given for --git-dir.\n" );
118 usage(git_usage_string
);
120 setenv(GIT_DIR_ENVIRONMENT
, (*argv
)[1], 1);
125 } else if (!prefixcmp(cmd
, "--git-dir=")) {
126 setenv(GIT_DIR_ENVIRONMENT
, cmd
+ 10, 1);
129 } else if (!strcmp(cmd
, "--work-tree")) {
131 fprintf(stderr
, "No directory given for --work-tree.\n" );
132 usage(git_usage_string
);
134 setenv(GIT_WORK_TREE_ENVIRONMENT
, (*argv
)[1], 1);
139 } else if (!prefixcmp(cmd
, "--work-tree=")) {
140 setenv(GIT_WORK_TREE_ENVIRONMENT
, cmd
+ 12, 1);
143 } else if (!strcmp(cmd
, "--bare")) {
144 static char git_dir
[PATH_MAX
+1];
145 is_bare_repository_cfg
= 1;
146 setenv(GIT_DIR_ENVIRONMENT
, getcwd(git_dir
, sizeof(git_dir
)), 0);
149 } else if (!strcmp(cmd
, "-c")) {
151 fprintf(stderr
, "-c expects a configuration string\n" );
152 usage(git_usage_string
);
154 git_config_push_parameter((*argv
)[1]);
158 fprintf(stderr
, "Unknown option: %s\n", cmd
);
159 usage(git_usage_string
);
165 return (*argv
) - orig_argv
;
168 static int handle_alias(int *argcp
, const char ***argv
)
170 int envchanged
= 0, ret
= 0, saved_errno
= errno
;
172 int count
, option_count
;
173 const char **new_argv
;
174 const char *alias_command
;
178 subdir
= setup_git_directory_gently(&unused_nongit
);
180 alias_command
= (*argv
)[0];
181 alias_string
= alias_lookup(alias_command
);
183 if (alias_string
[0] == '!') {
184 const char **alias_argv
;
185 int argc
= *argcp
, i
;
186 struct strbuf sb
= STRBUF_INIT
;
189 commit_pager_choice();
191 /* build alias_argv */
192 alias_argv
= xmalloc(sizeof(*alias_argv
) * (argc
+ 1));
193 alias_argv
[0] = alias_string
+ 1;
194 for (i
= 1; i
< argc
; ++i
)
195 alias_argv
[i
] = (*argv
)[i
];
196 alias_argv
[argc
] = NULL
;
198 strbuf_addstr(&sb
, "GIT_PREFIX=");
200 strbuf_addstr(&sb
, subdir
);
203 ret
= run_command_v_opt_cd_env(alias_argv
, RUN_USING_SHELL
, NULL
, env
);
205 if (ret
>= 0) /* normal exit */
208 die_errno("While expanding alias '%s': '%s'",
209 alias_command
, alias_string
+ 1);
211 count
= split_cmdline(alias_string
, &new_argv
);
213 die("Bad alias.%s string: %s", alias_command
,
214 split_cmdline_strerror(count
));
215 option_count
= handle_options(&new_argv
, &count
, &envchanged
);
217 die("alias '%s' changes environment variables\n"
218 "You can use '!git' in the alias to do this.",
220 memmove(new_argv
- option_count
, new_argv
,
221 count
* sizeof(char *));
222 new_argv
-= option_count
;
225 die("empty alias for %s", alias_command
);
227 if (!strcmp(alias_command
, new_argv
[0]))
228 die("recursive alias: %s", alias_command
);
230 trace_argv_printf(new_argv
,
231 "trace: alias expansion: %s =>",
234 new_argv
= xrealloc(new_argv
, sizeof(char *) *
236 /* insert after command name */
237 memcpy(new_argv
+ count
, *argv
+ 1, sizeof(char *) * *argcp
);
245 if (subdir
&& chdir(subdir
))
246 die_errno("Cannot change to '%s'", subdir
);
253 const char git_version_string
[] = GIT_VERSION
;
255 #define RUN_SETUP (1<<0)
256 #define RUN_SETUP_GENTLY (1<<1)
257 #define USE_PAGER (1<<2)
259 * require working tree to be present -- anything uses this needs
260 * RUN_SETUP for reading from the configuration file.
262 #define NEED_WORK_TREE (1<<3)
266 int (*fn
)(int, const char **, const char *);
270 static int run_builtin(struct cmd_struct
*p
, int argc
, const char **argv
)
277 help
= argc
== 2 && !strcmp(argv
[1], "-h");
279 if (p
->option
& RUN_SETUP
)
280 prefix
= setup_git_directory();
281 if (p
->option
& RUN_SETUP_GENTLY
) {
283 prefix
= setup_git_directory_gently(&nongit_ok
);
286 if (use_pager
== -1 && p
->option
& (RUN_SETUP
| RUN_SETUP_GENTLY
))
287 use_pager
= check_pager_config(p
->cmd
);
288 if (use_pager
== -1 && p
->option
& USE_PAGER
)
291 if ((p
->option
& (RUN_SETUP
| RUN_SETUP_GENTLY
)) &&
292 startup_info
->have_repository
) /* get_git_dir() may set up repo, avoid that */
293 trace_repo_setup(prefix
);
295 commit_pager_choice();
297 if (!help
&& p
->option
& NEED_WORK_TREE
)
300 trace_argv_printf(argv
, "trace: built-in: git");
302 status
= p
->fn(argc
, argv
, prefix
);
306 /* Somebody closed stdout? */
307 if (fstat(fileno(stdout
), &st
))
309 /* Ignore write errors for pipes and sockets.. */
310 if (S_ISFIFO(st
.st_mode
) || S_ISSOCK(st
.st_mode
))
313 /* Check for ENOSPC and EIO errors.. */
315 die_errno("write failure on standard output");
317 die("unknown write failure on standard output");
319 die_errno("close failed on standard output");
323 static void handle_internal_command(int argc
, const char **argv
)
325 const char *cmd
= argv
[0];
326 static struct cmd_struct commands
[] = {
327 { "add", cmd_add
, RUN_SETUP
| NEED_WORK_TREE
},
328 { "annotate", cmd_annotate
, RUN_SETUP
},
329 { "apply", cmd_apply
, RUN_SETUP_GENTLY
},
330 { "archive", cmd_archive
},
331 { "bisect--helper", cmd_bisect__helper
, RUN_SETUP
| NEED_WORK_TREE
},
332 { "blame", cmd_blame
, RUN_SETUP
},
333 { "branch", cmd_branch
, RUN_SETUP
},
334 { "bundle", cmd_bundle
, RUN_SETUP_GENTLY
},
335 { "cat-file", cmd_cat_file
, RUN_SETUP
},
336 { "check-attr", cmd_check_attr
, RUN_SETUP
},
337 { "check-ref-format", cmd_check_ref_format
},
338 { "checkout", cmd_checkout
, RUN_SETUP
| NEED_WORK_TREE
},
339 { "checkout-index", cmd_checkout_index
,
340 RUN_SETUP
| NEED_WORK_TREE
},
341 { "cherry", cmd_cherry
, RUN_SETUP
},
342 { "cherry-pick", cmd_cherry_pick
, RUN_SETUP
| NEED_WORK_TREE
},
343 { "clean", cmd_clean
, RUN_SETUP
| NEED_WORK_TREE
},
344 { "clone", cmd_clone
},
345 { "commit", cmd_commit
, RUN_SETUP
| NEED_WORK_TREE
},
346 { "commit-tree", cmd_commit_tree
, RUN_SETUP
},
347 { "config", cmd_config
, RUN_SETUP_GENTLY
},
348 { "count-objects", cmd_count_objects
, RUN_SETUP
},
349 { "describe", cmd_describe
, RUN_SETUP
},
350 { "diff", cmd_diff
},
351 { "diff-files", cmd_diff_files
, RUN_SETUP
| NEED_WORK_TREE
},
352 { "diff-index", cmd_diff_index
, RUN_SETUP
},
353 { "diff-tree", cmd_diff_tree
, RUN_SETUP
},
354 { "fast-export", cmd_fast_export
, RUN_SETUP
},
355 { "fetch", cmd_fetch
, RUN_SETUP
},
356 { "fetch-pack", cmd_fetch_pack
, RUN_SETUP
},
357 { "fmt-merge-msg", cmd_fmt_merge_msg
, RUN_SETUP
},
358 { "for-each-ref", cmd_for_each_ref
, RUN_SETUP
},
359 { "format-patch", cmd_format_patch
, RUN_SETUP
},
360 { "fsck", cmd_fsck
, RUN_SETUP
},
361 { "fsck-objects", cmd_fsck
, RUN_SETUP
},
362 { "gc", cmd_gc
, RUN_SETUP
},
363 { "get-tar-commit-id", cmd_get_tar_commit_id
},
364 { "grep", cmd_grep
, RUN_SETUP_GENTLY
},
365 { "hash-object", cmd_hash_object
},
366 { "help", cmd_help
},
367 { "index-pack", cmd_index_pack
, RUN_SETUP_GENTLY
},
368 { "init", cmd_init_db
},
369 { "init-db", cmd_init_db
},
370 { "log", cmd_log
, RUN_SETUP
},
371 { "ls-files", cmd_ls_files
, RUN_SETUP
},
372 { "ls-remote", cmd_ls_remote
, RUN_SETUP_GENTLY
},
373 { "ls-tree", cmd_ls_tree
, RUN_SETUP
},
374 { "mailinfo", cmd_mailinfo
},
375 { "mailsplit", cmd_mailsplit
},
376 { "merge", cmd_merge
, RUN_SETUP
| NEED_WORK_TREE
},
377 { "merge-base", cmd_merge_base
, RUN_SETUP
},
378 { "merge-file", cmd_merge_file
, RUN_SETUP_GENTLY
},
379 { "merge-index", cmd_merge_index
, RUN_SETUP
},
380 { "merge-ours", cmd_merge_ours
, RUN_SETUP
},
381 { "merge-recursive", cmd_merge_recursive
, RUN_SETUP
| NEED_WORK_TREE
},
382 { "merge-recursive-ours", cmd_merge_recursive
, RUN_SETUP
| NEED_WORK_TREE
},
383 { "merge-recursive-theirs", cmd_merge_recursive
, RUN_SETUP
| NEED_WORK_TREE
},
384 { "merge-subtree", cmd_merge_recursive
, RUN_SETUP
| NEED_WORK_TREE
},
385 { "merge-tree", cmd_merge_tree
, RUN_SETUP
},
386 { "mktag", cmd_mktag
, RUN_SETUP
},
387 { "mktree", cmd_mktree
, RUN_SETUP
},
388 { "mv", cmd_mv
, RUN_SETUP
| NEED_WORK_TREE
},
389 { "name-rev", cmd_name_rev
, RUN_SETUP
},
390 { "notes", cmd_notes
, RUN_SETUP
},
391 { "pack-objects", cmd_pack_objects
, RUN_SETUP
},
392 { "pack-redundant", cmd_pack_redundant
, RUN_SETUP
},
393 { "pack-refs", cmd_pack_refs
, RUN_SETUP
},
394 { "patch-id", cmd_patch_id
},
395 { "peek-remote", cmd_ls_remote
, RUN_SETUP_GENTLY
},
396 { "pickaxe", cmd_blame
, RUN_SETUP
},
397 { "prune", cmd_prune
, RUN_SETUP
},
398 { "prune-packed", cmd_prune_packed
, RUN_SETUP
},
399 { "push", cmd_push
, RUN_SETUP
},
400 { "read-tree", cmd_read_tree
, RUN_SETUP
},
401 { "receive-pack", cmd_receive_pack
},
402 { "reflog", cmd_reflog
, RUN_SETUP
},
403 { "remote", cmd_remote
, RUN_SETUP
},
404 { "remote-ext", cmd_remote_ext
},
405 { "remote-fd", cmd_remote_fd
},
406 { "replace", cmd_replace
, RUN_SETUP
},
407 { "repo-config", cmd_repo_config
, RUN_SETUP_GENTLY
},
408 { "rerere", cmd_rerere
, RUN_SETUP
},
409 { "reset", cmd_reset
, RUN_SETUP
},
410 { "rev-list", cmd_rev_list
, RUN_SETUP
},
411 { "rev-parse", cmd_rev_parse
},
412 { "revert", cmd_revert
, RUN_SETUP
| NEED_WORK_TREE
},
413 { "rm", cmd_rm
, RUN_SETUP
},
414 { "send-pack", cmd_send_pack
, RUN_SETUP
},
415 { "shortlog", cmd_shortlog
, RUN_SETUP_GENTLY
| USE_PAGER
},
416 { "show", cmd_show
, RUN_SETUP
},
417 { "show-branch", cmd_show_branch
, RUN_SETUP
},
418 { "show-ref", cmd_show_ref
, RUN_SETUP
},
419 { "stage", cmd_add
, RUN_SETUP
| NEED_WORK_TREE
},
420 { "status", cmd_status
, RUN_SETUP
| NEED_WORK_TREE
},
421 { "stripspace", cmd_stripspace
},
422 { "symbolic-ref", cmd_symbolic_ref
, RUN_SETUP
},
423 { "tag", cmd_tag
, RUN_SETUP
},
424 { "tar-tree", cmd_tar_tree
},
425 { "unpack-file", cmd_unpack_file
, RUN_SETUP
},
426 { "unpack-objects", cmd_unpack_objects
, RUN_SETUP
},
427 { "update-index", cmd_update_index
, RUN_SETUP
},
428 { "update-ref", cmd_update_ref
, RUN_SETUP
},
429 { "update-server-info", cmd_update_server_info
, RUN_SETUP
},
430 { "upload-archive", cmd_upload_archive
},
431 { "var", cmd_var
, RUN_SETUP_GENTLY
},
432 { "verify-pack", cmd_verify_pack
},
433 { "verify-tag", cmd_verify_tag
, RUN_SETUP
},
434 { "version", cmd_version
},
435 { "whatchanged", cmd_whatchanged
, RUN_SETUP
},
436 { "write-tree", cmd_write_tree
, RUN_SETUP
},
439 static const char ext
[] = STRIP_EXTENSION
;
441 if (sizeof(ext
) > 1) {
442 i
= strlen(argv
[0]) - strlen(ext
);
443 if (i
> 0 && !strcmp(argv
[0] + i
, ext
)) {
444 char *argv0
= xstrdup(argv
[0]);
445 argv
[0] = cmd
= argv0
;
450 /* Turn "git cmd --help" into "git help cmd" */
451 if (argc
> 1 && !strcmp(argv
[1], "--help")) {
453 argv
[0] = cmd
= "help";
456 for (i
= 0; i
< ARRAY_SIZE(commands
); i
++) {
457 struct cmd_struct
*p
= commands
+i
;
458 if (strcmp(p
->cmd
, cmd
))
460 exit(run_builtin(p
, argc
, argv
));
464 static void execv_dashed_external(const char **argv
)
466 struct strbuf cmd
= STRBUF_INIT
;
471 use_pager
= check_pager_config(argv
[0]);
472 commit_pager_choice();
474 strbuf_addf(&cmd
, "git-%s", argv
[0]);
477 * argv[0] must be the git command, but the argv array
478 * belongs to the caller, and may be reused in
479 * subsequent loop iterations. Save argv[0] and
480 * restore it on error.
485 trace_argv_printf(argv
, "trace: exec:");
488 * if we fail because the command is not found, it is
489 * OK to return. Otherwise, we just pass along the status code.
491 status
= run_command_v_opt(argv
, RUN_SILENT_EXEC_FAILURE
);
492 if (status
>= 0 || errno
!= ENOENT
)
497 strbuf_release(&cmd
);
500 static int run_argv(int *argcp
, const char ***argv
)
505 /* See if it's an internal command */
506 handle_internal_command(*argcp
, *argv
);
508 /* .. then try the external ones */
509 execv_dashed_external(*argv
);
511 /* It could be an alias -- this works around the insanity
512 * of overriding "git log" with "git show" by having
515 if (done_alias
|| !handle_alias(argcp
, argv
))
524 int main(int argc
, const char **argv
)
528 startup_info
= &git_startup_info
;
530 cmd
= git_extract_argv0_path(argv
[0]);
535 * "git-xxxx" is the same as "git xxxx", but we obviously:
537 * - cannot take flags in between the "git" and the "xxxx".
538 * - cannot execute it externally (since it would just do
539 * the same thing over again)
541 * So we just directly call the internal command handler, and
542 * die if that one cannot handle it.
544 if (!prefixcmp(cmd
, "git-")) {
547 handle_internal_command(argc
, argv
);
548 die("cannot handle %s internally", cmd
);
551 /* Look for flags.. */
554 handle_options(&argv
, &argc
, NULL
);
556 if (!prefixcmp(argv
[0], "--"))
559 /* The user didn't specify a command; give them help */
560 commit_pager_choice();
561 printf("usage: %s\n\n", git_usage_string
);
562 list_common_cmds_help();
563 printf("\n%s\n", git_more_info_string
);
569 * We use PATH to find git commands, but we prepend some higher
570 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
571 * environment, and the $(gitexecdir) from the Makefile at build
577 static int done_help
= 0;
578 static int was_alias
= 0;
579 was_alias
= run_argv(&argc
, &argv
);
583 fprintf(stderr
, "Expansion of alias '%s' failed; "
584 "'%s' is not a git command\n",
589 cmd
= argv
[0] = help_unknown_cmd(cmd
);
595 fprintf(stderr
, "Failed to run command '%s': %s\n",
596 cmd
, strerror(errno
));