6 const char git_usage_string
[] =
7 "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]";
9 const char git_more_info_string
[] =
10 "See 'git help COMMAND' for more information on a specific command.";
12 static int handle_options(const char*** argv
, int* argc
, int* envchanged
)
17 const char *cmd
= (*argv
)[0];
22 * For legacy reasons, the "version" and "help"
23 * commands can be written with "--" prepended
24 * to make them look like flags.
26 if (!strcmp(cmd
, "--help") || !strcmp(cmd
, "--version"))
30 * Check remaining flags.
32 if (!prefixcmp(cmd
, "--exec-path")) {
35 git_set_argv_exec_path(cmd
+ 1);
37 puts(git_exec_path());
40 } else if (!strcmp(cmd
, "-p") || !strcmp(cmd
, "--paginate")) {
42 } else if (!strcmp(cmd
, "--no-pager")) {
43 setenv("GIT_PAGER", "cat", 1);
46 } else if (!strcmp(cmd
, "--git-dir")) {
48 fprintf(stderr
, "No directory given for --git-dir.\n" );
49 usage(git_usage_string
);
51 setenv(GIT_DIR_ENVIRONMENT
, (*argv
)[1], 1);
57 } else if (!prefixcmp(cmd
, "--git-dir=")) {
58 setenv(GIT_DIR_ENVIRONMENT
, cmd
+ 10, 1);
61 } else if (!strcmp(cmd
, "--work-tree")) {
63 fprintf(stderr
, "No directory given for --work-tree.\n" );
64 usage(git_usage_string
);
66 setenv(GIT_WORK_TREE_ENVIRONMENT
, (*argv
)[1], 1);
71 } else if (!prefixcmp(cmd
, "--work-tree=")) {
72 setenv(GIT_WORK_TREE_ENVIRONMENT
, cmd
+ 12, 1);
75 } else if (!strcmp(cmd
, "--bare")) {
76 static char git_dir
[PATH_MAX
+1];
77 is_bare_repository_cfg
= 1;
78 setenv(GIT_DIR_ENVIRONMENT
, getcwd(git_dir
, sizeof(git_dir
)), 0);
82 fprintf(stderr
, "Unknown option: %s\n", cmd
);
83 usage(git_usage_string
);
93 static int split_cmdline(char *cmdline
, const char ***argv
)
95 int src
, dst
, count
= 0, size
= 16;
98 *argv
= xmalloc(sizeof(char*) * size
);
100 /* split alias_string */
101 (*argv
)[count
++] = cmdline
;
102 for (src
= dst
= 0; cmdline
[src
];) {
103 char c
= cmdline
[src
];
104 if (!quoted
&& isspace(c
)) {
106 while (cmdline
[++src
]
107 && isspace(cmdline
[src
]))
111 *argv
= xrealloc(*argv
, sizeof(char*) * size
);
113 (*argv
)[count
++] = cmdline
+ dst
;
114 } else if(!quoted
&& (c
== '\'' || c
== '"')) {
117 } else if (c
== quoted
) {
121 if (c
== '\\' && quoted
!= '\'') {
127 return error("cmdline ends with \\");
140 return error("unclosed quote");
146 static int handle_alias(int *argcp
, const char ***argv
)
148 int envchanged
= 0, ret
= 0, saved_errno
= errno
;
150 int count
, option_count
;
151 const char** new_argv
;
152 const char *alias_command
;
156 subdir
= setup_git_directory_gently(&unused_nongit
);
158 alias_command
= (*argv
)[0];
159 alias_string
= alias_lookup(alias_command
);
161 if (alias_string
[0] == '!') {
165 strbuf_init(&buf
, PATH_MAX
);
166 strbuf_addstr(&buf
, alias_string
);
167 sq_quote_argv(&buf
, (*argv
) + 1, PATH_MAX
);
169 alias_string
= buf
.buf
;
171 trace_printf("trace: alias to shell cmd: %s => %s\n",
172 alias_command
, alias_string
+ 1);
173 ret
= system(alias_string
+ 1);
174 if (ret
>= 0 && WIFEXITED(ret
) &&
175 WEXITSTATUS(ret
) != 127)
176 exit(WEXITSTATUS(ret
));
177 die("Failed to run '%s' when expanding alias '%s'\n",
178 alias_string
+ 1, alias_command
);
180 count
= split_cmdline(alias_string
, &new_argv
);
181 option_count
= handle_options(&new_argv
, &count
, &envchanged
);
183 die("alias '%s' changes environment variables\n"
184 "You can use '!git' in the alias to do this.",
186 memmove(new_argv
- option_count
, new_argv
,
187 count
* sizeof(char *));
188 new_argv
-= option_count
;
191 die("empty alias for %s", alias_command
);
193 if (!strcmp(alias_command
, new_argv
[0]))
194 die("recursive alias: %s", alias_command
);
196 trace_argv_printf(new_argv
,
197 "trace: alias expansion: %s =>",
200 new_argv
= xrealloc(new_argv
, sizeof(char*) *
201 (count
+ *argcp
+ 1));
202 /* insert after command name */
203 memcpy(new_argv
+ count
, *argv
+ 1, sizeof(char*) * *argcp
);
204 new_argv
[count
+*argcp
] = NULL
;
220 const char git_version_string
[] = GIT_VERSION
;
222 #define RUN_SETUP (1<<0)
223 #define USE_PAGER (1<<1)
225 * require working tree to be present -- anything uses this needs
226 * RUN_SETUP for reading from the configuration file.
228 #define NEED_WORK_TREE (1<<2)
232 int (*fn
)(int, const char **, const char *);
236 static int run_command(struct cmd_struct
*p
, int argc
, const char **argv
)
243 if (p
->option
& RUN_SETUP
)
244 prefix
= setup_git_directory();
245 if (p
->option
& USE_PAGER
)
247 if (p
->option
& NEED_WORK_TREE
)
250 trace_argv_printf(argv
, "trace: built-in: git");
252 status
= p
->fn(argc
, argv
, prefix
);
254 return status
& 0xff;
256 /* Somebody closed stdout? */
257 if (fstat(fileno(stdout
), &st
))
259 /* Ignore write errors for pipes and sockets.. */
260 if (S_ISFIFO(st
.st_mode
) || S_ISSOCK(st
.st_mode
))
263 /* Check for ENOSPC and EIO errors.. */
265 die("write failure on standard output: %s", strerror(errno
));
267 die("unknown write failure on standard output");
269 die("close failed on standard output: %s", strerror(errno
));
273 static void handle_internal_command(int argc
, const char **argv
)
275 const char *cmd
= argv
[0];
276 static struct cmd_struct commands
[] = {
277 { "add", cmd_add
, RUN_SETUP
| NEED_WORK_TREE
},
278 { "annotate", cmd_annotate
, RUN_SETUP
},
279 { "apply", cmd_apply
},
280 { "archive", cmd_archive
},
281 { "blame", cmd_blame
, RUN_SETUP
},
282 { "branch", cmd_branch
, RUN_SETUP
},
283 { "bundle", cmd_bundle
},
284 { "cat-file", cmd_cat_file
, RUN_SETUP
},
285 { "checkout", cmd_checkout
, RUN_SETUP
| NEED_WORK_TREE
},
286 { "checkout-index", cmd_checkout_index
,
287 RUN_SETUP
| NEED_WORK_TREE
},
288 { "check-ref-format", cmd_check_ref_format
},
289 { "check-attr", cmd_check_attr
, RUN_SETUP
},
290 { "cherry", cmd_cherry
, RUN_SETUP
},
291 { "cherry-pick", cmd_cherry_pick
, RUN_SETUP
| NEED_WORK_TREE
},
292 { "clone", cmd_clone
},
293 { "clean", cmd_clean
, RUN_SETUP
| NEED_WORK_TREE
},
294 { "commit", cmd_commit
, RUN_SETUP
| NEED_WORK_TREE
},
295 { "commit-tree", cmd_commit_tree
, RUN_SETUP
},
296 { "config", cmd_config
},
297 { "count-objects", cmd_count_objects
, RUN_SETUP
},
298 { "describe", cmd_describe
, RUN_SETUP
},
299 { "diff", cmd_diff
},
300 { "diff-files", cmd_diff_files
, RUN_SETUP
},
301 { "diff-index", cmd_diff_index
, RUN_SETUP
},
302 { "diff-tree", cmd_diff_tree
, RUN_SETUP
},
303 { "fast-export", cmd_fast_export
, RUN_SETUP
},
304 { "fetch", cmd_fetch
, RUN_SETUP
},
305 { "fetch-pack", cmd_fetch_pack
, RUN_SETUP
},
306 { "fetch--tool", cmd_fetch__tool
, RUN_SETUP
},
307 { "fmt-merge-msg", cmd_fmt_merge_msg
, RUN_SETUP
},
308 { "for-each-ref", cmd_for_each_ref
, RUN_SETUP
},
309 { "format-patch", cmd_format_patch
, RUN_SETUP
},
310 { "fsck", cmd_fsck
, RUN_SETUP
},
311 { "fsck-objects", cmd_fsck
, RUN_SETUP
},
312 { "gc", cmd_gc
, RUN_SETUP
},
313 { "get-tar-commit-id", cmd_get_tar_commit_id
},
314 { "grep", cmd_grep
, RUN_SETUP
| USE_PAGER
},
315 { "help", cmd_help
},
317 { "http-fetch", cmd_http_fetch
, RUN_SETUP
},
319 { "init", cmd_init_db
},
320 { "init-db", cmd_init_db
},
321 { "log", cmd_log
, RUN_SETUP
| USE_PAGER
},
322 { "ls-files", cmd_ls_files
, RUN_SETUP
},
323 { "ls-tree", cmd_ls_tree
, RUN_SETUP
},
324 { "ls-remote", cmd_ls_remote
},
325 { "mailinfo", cmd_mailinfo
},
326 { "mailsplit", cmd_mailsplit
},
327 { "merge-base", cmd_merge_base
, RUN_SETUP
},
328 { "merge-file", cmd_merge_file
},
329 { "merge-ours", cmd_merge_ours
, RUN_SETUP
},
330 { "merge-recursive", cmd_merge_recursive
, RUN_SETUP
| NEED_WORK_TREE
},
331 { "merge-subtree", cmd_merge_recursive
, RUN_SETUP
| NEED_WORK_TREE
},
332 { "mv", cmd_mv
, RUN_SETUP
| NEED_WORK_TREE
},
333 { "name-rev", cmd_name_rev
, RUN_SETUP
},
334 { "pack-objects", cmd_pack_objects
, RUN_SETUP
},
335 { "peek-remote", cmd_ls_remote
},
336 { "pickaxe", cmd_blame
, RUN_SETUP
},
337 { "prune", cmd_prune
, RUN_SETUP
},
338 { "prune-packed", cmd_prune_packed
, RUN_SETUP
},
339 { "push", cmd_push
, RUN_SETUP
},
340 { "read-tree", cmd_read_tree
, RUN_SETUP
},
341 { "reflog", cmd_reflog
, RUN_SETUP
},
342 { "remote", cmd_remote
, RUN_SETUP
},
343 { "repo-config", cmd_config
},
344 { "rerere", cmd_rerere
, RUN_SETUP
},
345 { "reset", cmd_reset
, RUN_SETUP
},
346 { "rev-list", cmd_rev_list
, RUN_SETUP
},
347 { "rev-parse", cmd_rev_parse
},
348 { "revert", cmd_revert
, RUN_SETUP
| NEED_WORK_TREE
},
349 { "rm", cmd_rm
, RUN_SETUP
},
350 { "send-pack", cmd_send_pack
, RUN_SETUP
},
351 { "shortlog", cmd_shortlog
, USE_PAGER
},
352 { "show-branch", cmd_show_branch
, RUN_SETUP
},
353 { "show", cmd_show
, RUN_SETUP
| USE_PAGER
},
354 { "status", cmd_status
, RUN_SETUP
| NEED_WORK_TREE
| USE_PAGER
},
355 { "stripspace", cmd_stripspace
},
356 { "symbolic-ref", cmd_symbolic_ref
, RUN_SETUP
},
357 { "tag", cmd_tag
, RUN_SETUP
},
358 { "tar-tree", cmd_tar_tree
},
359 { "unpack-objects", cmd_unpack_objects
, RUN_SETUP
},
360 { "update-index", cmd_update_index
, RUN_SETUP
},
361 { "update-ref", cmd_update_ref
, RUN_SETUP
},
362 { "upload-archive", cmd_upload_archive
},
363 { "verify-tag", cmd_verify_tag
, RUN_SETUP
},
364 { "version", cmd_version
},
365 { "whatchanged", cmd_whatchanged
, RUN_SETUP
| USE_PAGER
},
366 { "write-tree", cmd_write_tree
, RUN_SETUP
},
367 { "verify-pack", cmd_verify_pack
},
368 { "show-ref", cmd_show_ref
, RUN_SETUP
},
369 { "pack-refs", cmd_pack_refs
, RUN_SETUP
},
372 static const char ext
[] = STRIP_EXTENSION
;
374 if (sizeof(ext
) > 1) {
375 i
= strlen(argv
[0]) - strlen(ext
);
376 if (i
> 0 && !strcmp(argv
[0] + i
, ext
)) {
377 char *argv0
= strdup(argv
[0]);
378 argv
[0] = cmd
= argv0
;
383 /* Turn "git cmd --help" into "git help cmd" */
384 if (argc
> 1 && !strcmp(argv
[1], "--help")) {
386 argv
[0] = cmd
= "help";
389 for (i
= 0; i
< ARRAY_SIZE(commands
); i
++) {
390 struct cmd_struct
*p
= commands
+i
;
391 if (strcmp(p
->cmd
, cmd
))
393 exit(run_command(p
, argc
, argv
));
397 static void execv_dashed_external(const char **argv
)
402 strbuf_init(&cmd
, 0);
403 strbuf_addf(&cmd
, "git-%s", argv
[0]);
406 * argv[0] must be the git command, but the argv array
407 * belongs to the caller, and may be reused in
408 * subsequent loop iterations. Save argv[0] and
409 * restore it on error.
414 trace_argv_printf(argv
, "trace: exec:");
416 /* execvp() can only ever return if it fails */
417 execvp(cmd
.buf
, (char **)argv
);
419 trace_printf("trace: exec failed: %s\n", strerror(errno
));
423 strbuf_release(&cmd
);
427 int main(int argc
, const char **argv
)
429 const char *cmd
= argv
[0] && *argv
[0] ? argv
[0] : "git-help";
430 char *slash
= (char *)cmd
+ strlen(cmd
);
431 const char *cmd_path
= NULL
;
435 * Take the basename of argv[0] as the command
436 * name, and the dirname as the default exec_path
437 * if we don't have anything better.
441 while (cmd
<= slash
&& !is_dir_sep(*slash
));
449 * "git-xxxx" is the same as "git xxxx", but we obviously:
451 * - cannot take flags in between the "git" and the "xxxx".
452 * - cannot execute it externally (since it would just do
453 * the same thing over again)
455 * So we just directly call the internal command handler, and
456 * die if that one cannot handle it.
458 if (!prefixcmp(cmd
, "git-")) {
461 handle_internal_command(argc
, argv
);
462 die("cannot handle %s internally", cmd
);
465 /* Look for flags.. */
468 handle_options(&argv
, &argc
, NULL
);
470 if (!prefixcmp(argv
[0], "--"))
473 /* The user didn't specify a command; give them help */
474 printf("usage: %s\n\n", git_usage_string
);
475 list_common_cmds_help();
476 printf("\n%s\n", git_more_info_string
);
482 * We use PATH to find git commands, but we prepend some higher
483 * precidence paths: the "--exec-path" option, the GIT_EXEC_PATH
484 * environment, and the $(gitexecdir) from the Makefile at build
487 setup_path(cmd_path
);
490 /* See if it's an internal command */
491 handle_internal_command(argc
, argv
);
493 /* .. then try the external ones */
494 execv_dashed_external(argv
);
496 /* It could be an alias -- this works around the insanity
497 * of overriding "git log" with "git show" by having
500 if (done_alias
|| !handle_alias(&argc
, &argv
))
505 if (errno
== ENOENT
) {
507 fprintf(stderr
, "Expansion of alias '%s' failed; "
508 "'%s' is not a git-command\n",
512 help_unknown_cmd(cmd
);
515 fprintf(stderr
, "Failed to run command '%s': %s\n",
516 cmd
, strerror(errno
));