5 #include "run-command.h"
7 const char git_usage_string
[] =
8 "git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]\n"
9 " [-p|--paginate|--no-pager]\n"
10 " [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]\n"
11 " [--help] COMMAND [ARGS]";
13 const char git_more_info_string
[] =
14 "See 'git help COMMAND' for more information on a specific command.";
16 static int use_pager
= -1;
22 static int pager_command_config(const char *var
, const char *value
, void *data
)
24 struct pager_config
*c
= data
;
25 if (!prefixcmp(var
, "pager.") && !strcmp(var
+ 6, c
->cmd
))
26 c
->val
= git_config_bool(var
, value
);
30 /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
31 int check_pager_config(const char *cmd
)
33 struct pager_config c
;
36 git_config(pager_command_config
, &c
);
40 static void commit_pager_choice(void) {
43 setenv("GIT_PAGER", "cat", 1);
53 static int handle_options(const char ***argv
, int *argc
, int *envchanged
)
58 const char *cmd
= (*argv
)[0];
63 * For legacy reasons, the "version" and "help"
64 * commands can be written with "--" prepended
65 * to make them look like flags.
67 if (!strcmp(cmd
, "--help") || !strcmp(cmd
, "--version"))
71 * Check remaining flags.
73 if (!prefixcmp(cmd
, "--exec-path")) {
76 git_set_argv_exec_path(cmd
+ 1);
78 puts(git_exec_path());
81 } else if (!strcmp(cmd
, "--html-path")) {
82 puts(system_path(GIT_HTML_PATH
));
84 } else if (!strcmp(cmd
, "-p") || !strcmp(cmd
, "--paginate")) {
86 } else if (!strcmp(cmd
, "--no-pager")) {
90 } else if (!strcmp(cmd
, "--git-dir")) {
92 fprintf(stderr
, "No directory given for --git-dir.\n" );
93 usage(git_usage_string
);
95 setenv(GIT_DIR_ENVIRONMENT
, (*argv
)[1], 1);
101 } else if (!prefixcmp(cmd
, "--git-dir=")) {
102 setenv(GIT_DIR_ENVIRONMENT
, cmd
+ 10, 1);
105 } else if (!strcmp(cmd
, "--work-tree")) {
107 fprintf(stderr
, "No directory given for --work-tree.\n" );
108 usage(git_usage_string
);
110 setenv(GIT_WORK_TREE_ENVIRONMENT
, (*argv
)[1], 1);
115 } else if (!prefixcmp(cmd
, "--work-tree=")) {
116 setenv(GIT_WORK_TREE_ENVIRONMENT
, cmd
+ 12, 1);
119 } else if (!strcmp(cmd
, "--bare")) {
120 static char git_dir
[PATH_MAX
+1];
121 is_bare_repository_cfg
= 1;
122 setenv(GIT_DIR_ENVIRONMENT
, getcwd(git_dir
, sizeof(git_dir
)), 0);
126 fprintf(stderr
, "Unknown option: %s\n", cmd
);
127 usage(git_usage_string
);
137 static int handle_alias(int *argcp
, const char ***argv
)
139 int envchanged
= 0, ret
= 0, saved_errno
= errno
;
141 int count
, option_count
;
142 const char **new_argv
;
143 const char *alias_command
;
147 subdir
= setup_git_directory_gently(&unused_nongit
);
149 alias_command
= (*argv
)[0];
150 alias_string
= alias_lookup(alias_command
);
152 if (alias_string
[0] == '!') {
156 strbuf_init(&buf
, PATH_MAX
);
157 strbuf_addstr(&buf
, alias_string
);
158 sq_quote_argv(&buf
, (*argv
) + 1, PATH_MAX
);
160 alias_string
= buf
.buf
;
162 trace_printf("trace: alias to shell cmd: %s => %s\n",
163 alias_command
, alias_string
+ 1);
164 ret
= system(alias_string
+ 1);
165 if (ret
>= 0 && WIFEXITED(ret
) &&
166 WEXITSTATUS(ret
) != 127)
167 exit(WEXITSTATUS(ret
));
168 die("Failed to run '%s' when expanding alias '%s'",
169 alias_string
+ 1, alias_command
);
171 count
= split_cmdline(alias_string
, &new_argv
);
173 die("Bad alias.%s string", alias_command
);
174 option_count
= handle_options(&new_argv
, &count
, &envchanged
);
176 die("alias '%s' changes environment variables\n"
177 "You can use '!git' in the alias to do this.",
179 memmove(new_argv
- option_count
, new_argv
,
180 count
* sizeof(char *));
181 new_argv
-= option_count
;
184 die("empty alias for %s", alias_command
);
186 if (!strcmp(alias_command
, new_argv
[0]))
187 die("recursive alias: %s", alias_command
);
189 trace_argv_printf(new_argv
,
190 "trace: alias expansion: %s =>",
193 new_argv
= xrealloc(new_argv
, sizeof(char *) *
195 /* insert after command name */
196 memcpy(new_argv
+ count
, *argv
+ 1, sizeof(char *) * *argcp
);
204 if (subdir
&& chdir(subdir
))
205 die_errno("Cannot change to '%s'", subdir
);
212 const char git_version_string
[] = GIT_VERSION
;
214 #define RUN_SETUP (1<<0)
215 #define USE_PAGER (1<<1)
217 * require working tree to be present -- anything uses this needs
218 * RUN_SETUP for reading from the configuration file.
220 #define NEED_WORK_TREE (1<<2)
224 int (*fn
)(int, const char **, const char *);
228 static int run_builtin(struct cmd_struct
*p
, int argc
, const char **argv
)
235 if (p
->option
& RUN_SETUP
)
236 prefix
= setup_git_directory();
238 if (use_pager
== -1 && p
->option
& RUN_SETUP
)
239 use_pager
= check_pager_config(p
->cmd
);
240 if (use_pager
== -1 && p
->option
& USE_PAGER
)
242 commit_pager_choice();
244 if (p
->option
& NEED_WORK_TREE
)
247 trace_argv_printf(argv
, "trace: built-in: git");
249 status
= p
->fn(argc
, argv
, prefix
);
253 /* Somebody closed stdout? */
254 if (fstat(fileno(stdout
), &st
))
256 /* Ignore write errors for pipes and sockets.. */
257 if (S_ISFIFO(st
.st_mode
) || S_ISSOCK(st
.st_mode
))
260 /* Check for ENOSPC and EIO errors.. */
262 die_errno("write failure on standard output");
264 die("unknown write failure on standard output");
266 die_errno("close failed on standard output");
270 static void handle_internal_command(int argc
, const char **argv
)
272 const char *cmd
= argv
[0];
273 static struct cmd_struct commands
[] = {
274 { "add", cmd_add
, RUN_SETUP
| NEED_WORK_TREE
},
275 { "stage", cmd_add
, RUN_SETUP
| NEED_WORK_TREE
},
276 { "annotate", cmd_annotate
, RUN_SETUP
},
277 { "apply", cmd_apply
},
278 { "archive", cmd_archive
},
279 { "bisect--helper", cmd_bisect__helper
, RUN_SETUP
| NEED_WORK_TREE
},
280 { "blame", cmd_blame
, RUN_SETUP
},
281 { "branch", cmd_branch
, RUN_SETUP
},
282 { "bundle", cmd_bundle
},
283 { "cat-file", cmd_cat_file
, RUN_SETUP
},
284 { "checkout", cmd_checkout
, RUN_SETUP
| NEED_WORK_TREE
},
285 { "checkout-index", cmd_checkout_index
,
286 RUN_SETUP
| NEED_WORK_TREE
},
287 { "check-ref-format", cmd_check_ref_format
},
288 { "check-attr", cmd_check_attr
, RUN_SETUP
},
289 { "cherry", cmd_cherry
, RUN_SETUP
},
290 { "cherry-pick", cmd_cherry_pick
, RUN_SETUP
| NEED_WORK_TREE
},
291 { "clone", cmd_clone
},
292 { "clean", cmd_clean
, RUN_SETUP
| NEED_WORK_TREE
},
293 { "commit", cmd_commit
, RUN_SETUP
| NEED_WORK_TREE
},
294 { "commit-tree", cmd_commit_tree
, RUN_SETUP
},
295 { "config", cmd_config
},
296 { "count-objects", cmd_count_objects
, RUN_SETUP
},
297 { "describe", cmd_describe
, RUN_SETUP
},
298 { "diff", cmd_diff
},
299 { "diff-files", cmd_diff_files
, RUN_SETUP
| NEED_WORK_TREE
},
300 { "diff-index", cmd_diff_index
, RUN_SETUP
},
301 { "diff-tree", cmd_diff_tree
, RUN_SETUP
},
302 { "fast-export", cmd_fast_export
, RUN_SETUP
},
303 { "fetch", cmd_fetch
, RUN_SETUP
},
304 { "fetch-pack", cmd_fetch_pack
, RUN_SETUP
},
305 { "fetch--tool", cmd_fetch__tool
, RUN_SETUP
},
306 { "fmt-merge-msg", cmd_fmt_merge_msg
, RUN_SETUP
},
307 { "for-each-ref", cmd_for_each_ref
, RUN_SETUP
},
308 { "format-patch", cmd_format_patch
, RUN_SETUP
},
309 { "fsck", cmd_fsck
, RUN_SETUP
},
310 { "fsck-objects", cmd_fsck
, RUN_SETUP
},
311 { "gc", cmd_gc
, RUN_SETUP
},
312 { "get-tar-commit-id", cmd_get_tar_commit_id
},
313 { "grep", cmd_grep
, RUN_SETUP
| USE_PAGER
},
314 { "help", cmd_help
},
315 { "init", cmd_init_db
},
316 { "init-db", cmd_init_db
},
317 { "log", cmd_log
, RUN_SETUP
| USE_PAGER
},
318 { "ls-files", cmd_ls_files
, RUN_SETUP
},
319 { "ls-tree", cmd_ls_tree
, RUN_SETUP
},
320 { "ls-remote", cmd_ls_remote
},
321 { "mailinfo", cmd_mailinfo
},
322 { "mailsplit", cmd_mailsplit
},
323 { "merge", cmd_merge
, RUN_SETUP
| NEED_WORK_TREE
},
324 { "merge-base", cmd_merge_base
, RUN_SETUP
},
325 { "merge-file", cmd_merge_file
},
326 { "merge-ours", cmd_merge_ours
, RUN_SETUP
},
327 { "merge-recursive", cmd_merge_recursive
, RUN_SETUP
| NEED_WORK_TREE
},
328 { "merge-subtree", cmd_merge_recursive
, RUN_SETUP
| NEED_WORK_TREE
},
329 { "mktree", cmd_mktree
, RUN_SETUP
},
330 { "mv", cmd_mv
, RUN_SETUP
| NEED_WORK_TREE
},
331 { "name-rev", cmd_name_rev
, RUN_SETUP
},
332 { "pack-objects", cmd_pack_objects
, RUN_SETUP
},
333 { "peek-remote", cmd_ls_remote
},
334 { "pickaxe", cmd_blame
, RUN_SETUP
},
335 { "prune", cmd_prune
, RUN_SETUP
},
336 { "prune-packed", cmd_prune_packed
, RUN_SETUP
},
337 { "push", cmd_push
, RUN_SETUP
},
338 { "read-tree", cmd_read_tree
, RUN_SETUP
},
339 { "receive-pack", cmd_receive_pack
},
340 { "reflog", cmd_reflog
, RUN_SETUP
},
341 { "remote", cmd_remote
, RUN_SETUP
},
342 { "replace", cmd_replace
, 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
},
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 { "update-server-info", cmd_update_server_info
, RUN_SETUP
},
363 { "upload-archive", cmd_upload_archive
},
364 { "verify-tag", cmd_verify_tag
, RUN_SETUP
},
365 { "version", cmd_version
},
366 { "whatchanged", cmd_whatchanged
, RUN_SETUP
| USE_PAGER
},
367 { "write-tree", cmd_write_tree
, RUN_SETUP
},
368 { "verify-pack", cmd_verify_pack
},
369 { "show-ref", cmd_show_ref
, RUN_SETUP
},
370 { "pack-refs", cmd_pack_refs
, RUN_SETUP
},
373 static const char ext
[] = STRIP_EXTENSION
;
375 if (sizeof(ext
) > 1) {
376 i
= strlen(argv
[0]) - strlen(ext
);
377 if (i
> 0 && !strcmp(argv
[0] + i
, ext
)) {
378 char *argv0
= xstrdup(argv
[0]);
379 argv
[0] = cmd
= argv0
;
384 /* Turn "git cmd --help" into "git help cmd" */
385 if (argc
> 1 && !strcmp(argv
[1], "--help")) {
387 argv
[0] = cmd
= "help";
390 for (i
= 0; i
< ARRAY_SIZE(commands
); i
++) {
391 struct cmd_struct
*p
= commands
+i
;
392 if (strcmp(p
->cmd
, cmd
))
394 exit(run_builtin(p
, argc
, argv
));
398 static void execv_dashed_external(const char **argv
)
400 struct strbuf cmd
= STRBUF_INIT
;
404 strbuf_addf(&cmd
, "git-%s", argv
[0]);
407 * argv[0] must be the git command, but the argv array
408 * belongs to the caller, and may be reused in
409 * subsequent loop iterations. Save argv[0] and
410 * restore it on error.
415 trace_argv_printf(argv
, "trace: exec:");
418 * if we fail because the command is not found, it is
419 * OK to return. Otherwise, we just pass along the status code.
421 status
= run_command_v_opt(argv
, RUN_SILENT_EXEC_FAILURE
);
422 if (status
>= 0 || errno
!= ENOENT
)
427 strbuf_release(&cmd
);
430 static int run_argv(int *argcp
, const char ***argv
)
435 /* See if it's an internal command */
436 handle_internal_command(*argcp
, *argv
);
438 /* .. then try the external ones */
439 execv_dashed_external(*argv
);
441 /* It could be an alias -- this works around the insanity
442 * of overriding "git log" with "git show" by having
445 if (done_alias
|| !handle_alias(argcp
, argv
))
454 int main(int argc
, const char **argv
)
458 cmd
= git_extract_argv0_path(argv
[0]);
463 * "git-xxxx" is the same as "git xxxx", but we obviously:
465 * - cannot take flags in between the "git" and the "xxxx".
466 * - cannot execute it externally (since it would just do
467 * the same thing over again)
469 * So we just directly call the internal command handler, and
470 * die if that one cannot handle it.
472 if (!prefixcmp(cmd
, "git-")) {
475 handle_internal_command(argc
, argv
);
476 die("cannot handle %s internally", cmd
);
479 /* Look for flags.. */
482 handle_options(&argv
, &argc
, NULL
);
483 commit_pager_choice();
485 if (!prefixcmp(argv
[0], "--"))
488 /* The user didn't specify a command; give them help */
489 printf("usage: %s\n\n", git_usage_string
);
490 list_common_cmds_help();
491 printf("\n%s\n", git_more_info_string
);
497 * We use PATH to find git commands, but we prepend some higher
498 * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
499 * environment, and the $(gitexecdir) from the Makefile at build
505 static int done_help
= 0;
506 static int was_alias
= 0;
507 was_alias
= run_argv(&argc
, &argv
);
511 fprintf(stderr
, "Expansion of alias '%s' failed; "
512 "'%s' is not a git-command\n",
517 cmd
= argv
[0] = help_unknown_cmd(cmd
);
523 fprintf(stderr
, "Failed to run command '%s': %s\n",
524 cmd
, strerror(errno
));