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 use_pager
= -1;
18 static int pager_command_config(const char *var
, const char *value
, void *data
)
20 struct pager_config
*c
= data
;
21 if (!prefixcmp(var
, "pager.") && !strcmp(var
+ 6, c
->cmd
))
22 c
->val
= git_config_bool(var
, value
);
26 /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
27 int check_pager_config(const char *cmd
)
29 struct pager_config c
;
32 git_config(pager_command_config
, &c
);
36 static void commit_pager_choice(void) {
39 setenv("GIT_PAGER", "cat", 1);
49 static int handle_options(const char*** argv
, int* argc
, int* envchanged
)
54 const char *cmd
= (*argv
)[0];
59 * For legacy reasons, the "version" and "help"
60 * commands can be written with "--" prepended
61 * to make them look like flags.
63 if (!strcmp(cmd
, "--help") || !strcmp(cmd
, "--version"))
67 * Check remaining flags.
69 if (!prefixcmp(cmd
, "--exec-path")) {
72 git_set_argv_exec_path(cmd
+ 1);
74 puts(git_exec_path());
77 } else if (!strcmp(cmd
, "-p") || !strcmp(cmd
, "--paginate")) {
79 } else if (!strcmp(cmd
, "--no-pager")) {
83 } else if (!strcmp(cmd
, "--git-dir")) {
85 fprintf(stderr
, "No directory given for --git-dir.\n" );
86 usage(git_usage_string
);
88 setenv(GIT_DIR_ENVIRONMENT
, (*argv
)[1], 1);
94 } else if (!prefixcmp(cmd
, "--git-dir=")) {
95 setenv(GIT_DIR_ENVIRONMENT
, cmd
+ 10, 1);
98 } else if (!strcmp(cmd
, "--work-tree")) {
100 fprintf(stderr
, "No directory given for --work-tree.\n" );
101 usage(git_usage_string
);
103 setenv(GIT_WORK_TREE_ENVIRONMENT
, (*argv
)[1], 1);
108 } else if (!prefixcmp(cmd
, "--work-tree=")) {
109 setenv(GIT_WORK_TREE_ENVIRONMENT
, cmd
+ 12, 1);
112 } else if (!strcmp(cmd
, "--bare")) {
113 static char git_dir
[PATH_MAX
+1];
114 is_bare_repository_cfg
= 1;
115 setenv(GIT_DIR_ENVIRONMENT
, getcwd(git_dir
, sizeof(git_dir
)), 0);
119 fprintf(stderr
, "Unknown option: %s\n", cmd
);
120 usage(git_usage_string
);
130 static int split_cmdline(char *cmdline
, const char ***argv
)
132 int src
, dst
, count
= 0, size
= 16;
135 *argv
= xmalloc(sizeof(char*) * size
);
137 /* split alias_string */
138 (*argv
)[count
++] = cmdline
;
139 for (src
= dst
= 0; cmdline
[src
];) {
140 char c
= cmdline
[src
];
141 if (!quoted
&& isspace(c
)) {
143 while (cmdline
[++src
]
144 && isspace(cmdline
[src
]))
148 *argv
= xrealloc(*argv
, sizeof(char*) * size
);
150 (*argv
)[count
++] = cmdline
+ dst
;
151 } else if(!quoted
&& (c
== '\'' || c
== '"')) {
154 } else if (c
== quoted
) {
158 if (c
== '\\' && quoted
!= '\'') {
164 return error("cmdline ends with \\");
177 return error("unclosed quote");
183 static int handle_alias(int *argcp
, const char ***argv
)
185 int envchanged
= 0, ret
= 0, saved_errno
= errno
;
187 int count
, option_count
;
188 const char** new_argv
;
189 const char *alias_command
;
193 subdir
= setup_git_directory_gently(&unused_nongit
);
195 alias_command
= (*argv
)[0];
196 alias_string
= alias_lookup(alias_command
);
198 if (alias_string
[0] == '!') {
202 strbuf_init(&buf
, PATH_MAX
);
203 strbuf_addstr(&buf
, alias_string
);
204 sq_quote_argv(&buf
, (*argv
) + 1, PATH_MAX
);
206 alias_string
= buf
.buf
;
208 trace_printf("trace: alias to shell cmd: %s => %s\n",
209 alias_command
, alias_string
+ 1);
210 ret
= system(alias_string
+ 1);
211 if (ret
>= 0 && WIFEXITED(ret
) &&
212 WEXITSTATUS(ret
) != 127)
213 exit(WEXITSTATUS(ret
));
214 die("Failed to run '%s' when expanding alias '%s'\n",
215 alias_string
+ 1, alias_command
);
217 count
= split_cmdline(alias_string
, &new_argv
);
218 option_count
= handle_options(&new_argv
, &count
, &envchanged
);
220 die("alias '%s' changes environment variables\n"
221 "You can use '!git' in the alias to do this.",
223 memmove(new_argv
- option_count
, new_argv
,
224 count
* sizeof(char *));
225 new_argv
-= option_count
;
228 die("empty alias for %s", alias_command
);
230 if (!strcmp(alias_command
, new_argv
[0]))
231 die("recursive alias: %s", alias_command
);
233 trace_argv_printf(new_argv
,
234 "trace: alias expansion: %s =>",
237 new_argv
= xrealloc(new_argv
, sizeof(char*) *
238 (count
+ *argcp
+ 1));
239 /* insert after command name */
240 memcpy(new_argv
+ count
, *argv
+ 1, sizeof(char*) * *argcp
);
241 new_argv
[count
+*argcp
] = NULL
;
257 const char git_version_string
[] = GIT_VERSION
;
259 #define RUN_SETUP (1<<0)
260 #define USE_PAGER (1<<1)
262 * require working tree to be present -- anything uses this needs
263 * RUN_SETUP for reading from the configuration file.
265 #define NEED_WORK_TREE (1<<2)
269 int (*fn
)(int, const char **, const char *);
273 static int run_command(struct cmd_struct
*p
, int argc
, const char **argv
)
280 if (p
->option
& RUN_SETUP
)
281 prefix
= setup_git_directory();
283 if (use_pager
== -1 && p
->option
& RUN_SETUP
)
284 use_pager
= check_pager_config(p
->cmd
);
285 if (use_pager
== -1 && p
->option
& USE_PAGER
)
287 commit_pager_choice();
289 if (p
->option
& NEED_WORK_TREE
)
292 trace_argv_printf(argv
, "trace: built-in: git");
294 status
= p
->fn(argc
, argv
, prefix
);
296 return status
& 0xff;
298 /* Somebody closed stdout? */
299 if (fstat(fileno(stdout
), &st
))
301 /* Ignore write errors for pipes and sockets.. */
302 if (S_ISFIFO(st
.st_mode
) || S_ISSOCK(st
.st_mode
))
305 /* Check for ENOSPC and EIO errors.. */
307 die("write failure on standard output: %s", strerror(errno
));
309 die("unknown write failure on standard output");
311 die("close failed on standard output: %s", strerror(errno
));
315 static void handle_internal_command(int argc
, const char **argv
)
317 const char *cmd
= argv
[0];
318 static struct cmd_struct commands
[] = {
319 { "add", cmd_add
, RUN_SETUP
| NEED_WORK_TREE
},
320 { "annotate", cmd_annotate
, RUN_SETUP
},
321 { "apply", cmd_apply
},
322 { "archive", cmd_archive
},
323 { "blame", cmd_blame
, RUN_SETUP
},
324 { "branch", cmd_branch
, RUN_SETUP
},
325 { "bundle", cmd_bundle
},
326 { "cat-file", cmd_cat_file
, RUN_SETUP
},
327 { "checkout", cmd_checkout
, RUN_SETUP
| NEED_WORK_TREE
},
328 { "checkout-index", cmd_checkout_index
,
329 RUN_SETUP
| NEED_WORK_TREE
},
330 { "check-ref-format", cmd_check_ref_format
},
331 { "check-attr", cmd_check_attr
, RUN_SETUP
},
332 { "cherry", cmd_cherry
, RUN_SETUP
},
333 { "cherry-pick", cmd_cherry_pick
, RUN_SETUP
| NEED_WORK_TREE
},
334 { "clone", cmd_clone
},
335 { "clean", cmd_clean
, RUN_SETUP
| NEED_WORK_TREE
},
336 { "commit", cmd_commit
, RUN_SETUP
| NEED_WORK_TREE
},
337 { "commit-tree", cmd_commit_tree
, RUN_SETUP
},
338 { "config", cmd_config
},
339 { "count-objects", cmd_count_objects
, RUN_SETUP
},
340 { "describe", cmd_describe
, RUN_SETUP
},
341 { "diff", cmd_diff
},
342 { "diff-files", cmd_diff_files
, RUN_SETUP
},
343 { "diff-index", cmd_diff_index
, RUN_SETUP
},
344 { "diff-tree", cmd_diff_tree
, RUN_SETUP
},
345 { "fast-export", cmd_fast_export
, RUN_SETUP
},
346 { "fetch", cmd_fetch
, RUN_SETUP
},
347 { "fetch-pack", cmd_fetch_pack
, RUN_SETUP
},
348 { "fetch--tool", cmd_fetch__tool
, RUN_SETUP
},
349 { "fmt-merge-msg", cmd_fmt_merge_msg
, RUN_SETUP
},
350 { "for-each-ref", cmd_for_each_ref
, RUN_SETUP
},
351 { "format-patch", cmd_format_patch
, RUN_SETUP
},
352 { "fsck", cmd_fsck
, RUN_SETUP
},
353 { "fsck-objects", cmd_fsck
, RUN_SETUP
},
354 { "gc", cmd_gc
, RUN_SETUP
},
355 { "get-tar-commit-id", cmd_get_tar_commit_id
},
356 { "grep", cmd_grep
, RUN_SETUP
| USE_PAGER
},
357 { "help", cmd_help
},
359 { "http-fetch", cmd_http_fetch
, RUN_SETUP
},
361 { "init", cmd_init_db
},
362 { "init-db", cmd_init_db
},
363 { "log", cmd_log
, RUN_SETUP
| USE_PAGER
},
364 { "ls-files", cmd_ls_files
, RUN_SETUP
},
365 { "ls-tree", cmd_ls_tree
, RUN_SETUP
},
366 { "ls-remote", cmd_ls_remote
},
367 { "mailinfo", cmd_mailinfo
},
368 { "mailsplit", cmd_mailsplit
},
369 { "merge-base", cmd_merge_base
, RUN_SETUP
},
370 { "merge-file", cmd_merge_file
},
371 { "merge-ours", cmd_merge_ours
, RUN_SETUP
},
372 { "merge-recursive", cmd_merge_recursive
, RUN_SETUP
| NEED_WORK_TREE
},
373 { "merge-subtree", cmd_merge_recursive
, RUN_SETUP
| NEED_WORK_TREE
},
374 { "mv", cmd_mv
, RUN_SETUP
| NEED_WORK_TREE
},
375 { "name-rev", cmd_name_rev
, RUN_SETUP
},
376 { "pack-objects", cmd_pack_objects
, RUN_SETUP
},
377 { "peek-remote", cmd_ls_remote
},
378 { "pickaxe", cmd_blame
, RUN_SETUP
},
379 { "prune", cmd_prune
, RUN_SETUP
},
380 { "prune-packed", cmd_prune_packed
, RUN_SETUP
},
381 { "push", cmd_push
, RUN_SETUP
},
382 { "read-tree", cmd_read_tree
, RUN_SETUP
},
383 { "reflog", cmd_reflog
, RUN_SETUP
},
384 { "remote", cmd_remote
, RUN_SETUP
},
385 { "repo-config", cmd_config
},
386 { "rerere", cmd_rerere
, RUN_SETUP
},
387 { "reset", cmd_reset
, RUN_SETUP
},
388 { "rev-list", cmd_rev_list
, RUN_SETUP
},
389 { "rev-parse", cmd_rev_parse
},
390 { "revert", cmd_revert
, RUN_SETUP
| NEED_WORK_TREE
},
391 { "rm", cmd_rm
, RUN_SETUP
},
392 { "send-pack", cmd_send_pack
, RUN_SETUP
},
393 { "shortlog", cmd_shortlog
, USE_PAGER
},
394 { "show-branch", cmd_show_branch
, RUN_SETUP
},
395 { "show", cmd_show
, RUN_SETUP
| USE_PAGER
},
396 { "status", cmd_status
, RUN_SETUP
| NEED_WORK_TREE
| USE_PAGER
},
397 { "stripspace", cmd_stripspace
},
398 { "symbolic-ref", cmd_symbolic_ref
, RUN_SETUP
},
399 { "tag", cmd_tag
, RUN_SETUP
},
400 { "tar-tree", cmd_tar_tree
},
401 { "unpack-objects", cmd_unpack_objects
, RUN_SETUP
},
402 { "update-index", cmd_update_index
, RUN_SETUP
},
403 { "update-ref", cmd_update_ref
, RUN_SETUP
},
404 { "upload-archive", cmd_upload_archive
},
405 { "verify-tag", cmd_verify_tag
, RUN_SETUP
},
406 { "version", cmd_version
},
407 { "whatchanged", cmd_whatchanged
, RUN_SETUP
| USE_PAGER
},
408 { "write-tree", cmd_write_tree
, RUN_SETUP
},
409 { "verify-pack", cmd_verify_pack
},
410 { "show-ref", cmd_show_ref
, RUN_SETUP
},
411 { "pack-refs", cmd_pack_refs
, RUN_SETUP
},
414 static const char ext
[] = STRIP_EXTENSION
;
416 if (sizeof(ext
) > 1) {
417 i
= strlen(argv
[0]) - strlen(ext
);
418 if (i
> 0 && !strcmp(argv
[0] + i
, ext
)) {
419 char *argv0
= strdup(argv
[0]);
420 argv
[0] = cmd
= argv0
;
425 /* Turn "git cmd --help" into "git help cmd" */
426 if (argc
> 1 && !strcmp(argv
[1], "--help")) {
428 argv
[0] = cmd
= "help";
431 for (i
= 0; i
< ARRAY_SIZE(commands
); i
++) {
432 struct cmd_struct
*p
= commands
+i
;
433 if (strcmp(p
->cmd
, cmd
))
435 exit(run_command(p
, argc
, argv
));
439 static void execv_dashed_external(const char **argv
)
444 strbuf_init(&cmd
, 0);
445 strbuf_addf(&cmd
, "git-%s", argv
[0]);
448 * argv[0] must be the git command, but the argv array
449 * belongs to the caller, and may be reused in
450 * subsequent loop iterations. Save argv[0] and
451 * restore it on error.
456 trace_argv_printf(argv
, "trace: exec:");
458 /* execvp() can only ever return if it fails */
459 execvp(cmd
.buf
, (char **)argv
);
461 trace_printf("trace: exec failed: %s\n", strerror(errno
));
465 strbuf_release(&cmd
);
469 int main(int argc
, const char **argv
)
471 const char *cmd
= argv
[0] && *argv
[0] ? argv
[0] : "git-help";
472 char *slash
= (char *)cmd
+ strlen(cmd
);
473 const char *cmd_path
= NULL
;
477 * Take the basename of argv[0] as the command
478 * name, and the dirname as the default exec_path
479 * if we don't have anything better.
483 while (cmd
<= slash
&& !is_dir_sep(*slash
));
491 * "git-xxxx" is the same as "git xxxx", but we obviously:
493 * - cannot take flags in between the "git" and the "xxxx".
494 * - cannot execute it externally (since it would just do
495 * the same thing over again)
497 * So we just directly call the internal command handler, and
498 * die if that one cannot handle it.
500 if (!prefixcmp(cmd
, "git-")) {
503 handle_internal_command(argc
, argv
);
504 die("cannot handle %s internally", cmd
);
507 /* Look for flags.. */
510 handle_options(&argv
, &argc
, NULL
);
511 commit_pager_choice();
513 if (!prefixcmp(argv
[0], "--"))
516 /* The user didn't specify a command; give them help */
517 printf("usage: %s\n\n", git_usage_string
);
518 list_common_cmds_help();
519 printf("\n%s\n", git_more_info_string
);
525 * We use PATH to find git commands, but we prepend some higher
526 * precidence paths: the "--exec-path" option, the GIT_EXEC_PATH
527 * environment, and the $(gitexecdir) from the Makefile at build
530 setup_path(cmd_path
);
533 /* See if it's an internal command */
534 handle_internal_command(argc
, argv
);
536 /* .. then try the external ones */
537 execv_dashed_external(argv
);
539 /* It could be an alias -- this works around the insanity
540 * of overriding "git log" with "git show" by having
543 if (done_alias
|| !handle_alias(&argc
, &argv
))
548 if (errno
== ENOENT
) {
550 fprintf(stderr
, "Expansion of alias '%s' failed; "
551 "'%s' is not a git-command\n",
555 help_unknown_cmd(cmd
);
558 fprintf(stderr
, "Failed to run command '%s': %s\n",
559 cmd
, strerror(errno
));