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 static void prepend_to_path(const char *dir
, int len
)
11 const char *old_path
= getenv("PATH");
16 old_path
= "/usr/local/bin:/usr/bin:/bin";
18 path_len
= len
+ strlen(old_path
) + 1;
20 path
= xmalloc(path_len
+ 1);
22 memcpy(path
, dir
, len
);
28 memcpy(path
+ len
+ 1, old_path
, path_len
- len
);
30 setenv("PATH", path
, 1);
35 static int handle_options(const char*** argv
, int* argc
, int* envchanged
)
40 const char *cmd
= (*argv
)[0];
45 * For legacy reasons, the "version" and "help"
46 * commands can be written with "--" prepended
47 * to make them look like flags.
49 if (!strcmp(cmd
, "--help") || !strcmp(cmd
, "--version"))
53 * Check remaining flags.
55 if (!prefixcmp(cmd
, "--exec-path")) {
58 git_set_exec_path(cmd
+ 1);
60 puts(git_exec_path());
63 } else if (!strcmp(cmd
, "-p") || !strcmp(cmd
, "--paginate")) {
65 } else if (!strcmp(cmd
, "--no-pager")) {
66 setenv("GIT_PAGER", "cat", 1);
69 } else if (!strcmp(cmd
, "--git-dir")) {
71 fprintf(stderr
, "No directory given for --git-dir.\n" );
72 usage(git_usage_string
);
74 setenv(GIT_DIR_ENVIRONMENT
, (*argv
)[1], 1);
80 } else if (!prefixcmp(cmd
, "--git-dir=")) {
81 setenv(GIT_DIR_ENVIRONMENT
, cmd
+ 10, 1);
84 } else if (!strcmp(cmd
, "--work-tree")) {
86 fprintf(stderr
, "No directory given for --work-tree.\n" );
87 usage(git_usage_string
);
89 setenv(GIT_WORK_TREE_ENVIRONMENT
, (*argv
)[1], 1);
94 } else if (!prefixcmp(cmd
, "--work-tree=")) {
95 setenv(GIT_WORK_TREE_ENVIRONMENT
, cmd
+ 12, 1);
98 } else if (!strcmp(cmd
, "--bare")) {
99 static char git_dir
[PATH_MAX
+1];
100 is_bare_repository_cfg
= 1;
101 setenv(GIT_DIR_ENVIRONMENT
, getcwd(git_dir
, sizeof(git_dir
)), 0);
105 fprintf(stderr
, "Unknown option: %s\n", cmd
);
106 usage(git_usage_string
);
116 static const char *alias_command
;
117 static char *alias_string
;
119 static int git_alias_config(const char *var
, const char *value
)
121 if (!prefixcmp(var
, "alias.") && !strcmp(var
+ 6, alias_command
)) {
122 alias_string
= xstrdup(value
);
127 static int split_cmdline(char *cmdline
, const char ***argv
)
129 int src
, dst
, count
= 0, size
= 16;
132 *argv
= xmalloc(sizeof(char*) * size
);
134 /* split alias_string */
135 (*argv
)[count
++] = cmdline
;
136 for (src
= dst
= 0; cmdline
[src
];) {
137 char c
= cmdline
[src
];
138 if (!quoted
&& isspace(c
)) {
140 while (cmdline
[++src
]
141 && isspace(cmdline
[src
]))
145 *argv
= xrealloc(*argv
, sizeof(char*) * size
);
147 (*argv
)[count
++] = cmdline
+ dst
;
148 } else if(!quoted
&& (c
== '\'' || c
== '"')) {
151 } else if (c
== quoted
) {
155 if (c
== '\\' && quoted
!= '\'') {
161 return error("cmdline ends with \\");
174 return error("unclosed quote");
180 static int handle_alias(int *argcp
, const char ***argv
)
182 int nongit
= 0, envchanged
= 0, ret
= 0, saved_errno
= errno
;
184 int count
, option_count
;
185 const char** new_argv
;
187 subdir
= setup_git_directory_gently(&nongit
);
189 alias_command
= (*argv
)[0];
190 git_config(git_alias_config
);
192 if (alias_string
[0] == '!') {
194 int i
, sz
= PATH_MAX
;
195 char *s
= xmalloc(sz
), *new_alias
= s
;
197 add_to_string(&s
, &sz
, alias_string
, 0);
199 alias_string
= new_alias
;
200 for (i
= 1; i
< *argcp
&&
201 !add_to_string(&s
, &sz
, " ", 0) &&
202 !add_to_string(&s
, &sz
, (*argv
)[i
], 1)
206 die("Too many or long arguments");
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
, count
,
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();
282 if (p
->option
& USE_PAGER
)
284 if (p
->option
& NEED_WORK_TREE
) {
285 const char *work_tree
= get_git_work_tree();
286 const char *git_dir
= get_git_dir();
287 if (!is_absolute_path(git_dir
))
288 set_git_dir(make_absolute_path(git_dir
));
289 if (!work_tree
|| chdir(work_tree
))
290 die("%s must be run in a work tree", p
->cmd
);
292 trace_argv_printf(argv
, argc
, "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-index", cmd_checkout_index
,
328 RUN_SETUP
| NEED_WORK_TREE
},
329 { "check-ref-format", cmd_check_ref_format
},
330 { "check-attr", cmd_check_attr
, RUN_SETUP
| NEED_WORK_TREE
},
331 { "cherry", cmd_cherry
, RUN_SETUP
},
332 { "cherry-pick", cmd_cherry_pick
, RUN_SETUP
| NEED_WORK_TREE
},
333 { "commit-tree", cmd_commit_tree
, RUN_SETUP
},
334 { "config", cmd_config
},
335 { "count-objects", cmd_count_objects
, RUN_SETUP
},
336 { "describe", cmd_describe
, RUN_SETUP
},
337 { "diff", cmd_diff
},
338 { "diff-files", cmd_diff_files
},
339 { "diff-index", cmd_diff_index
, RUN_SETUP
},
340 { "diff-tree", cmd_diff_tree
, RUN_SETUP
},
341 { "fetch--tool", cmd_fetch__tool
, RUN_SETUP
},
342 { "fmt-merge-msg", cmd_fmt_merge_msg
, RUN_SETUP
},
343 { "for-each-ref", cmd_for_each_ref
, RUN_SETUP
},
344 { "format-patch", cmd_format_patch
, RUN_SETUP
},
345 { "fsck", cmd_fsck
, RUN_SETUP
},
346 { "fsck-objects", cmd_fsck
, RUN_SETUP
},
347 { "gc", cmd_gc
, RUN_SETUP
},
348 { "get-tar-commit-id", cmd_get_tar_commit_id
},
349 { "grep", cmd_grep
, RUN_SETUP
| USE_PAGER
},
350 { "help", cmd_help
},
351 { "init", cmd_init_db
},
352 { "init-db", cmd_init_db
},
353 { "log", cmd_log
, RUN_SETUP
| USE_PAGER
},
354 { "ls-files", cmd_ls_files
, RUN_SETUP
},
355 { "ls-tree", cmd_ls_tree
, RUN_SETUP
},
356 { "mailinfo", cmd_mailinfo
},
357 { "mailsplit", cmd_mailsplit
},
358 { "merge-base", cmd_merge_base
, RUN_SETUP
},
359 { "merge-file", cmd_merge_file
},
360 { "mv", cmd_mv
, RUN_SETUP
| NEED_WORK_TREE
},
361 { "name-rev", cmd_name_rev
, RUN_SETUP
},
362 { "pack-objects", cmd_pack_objects
, RUN_SETUP
},
363 { "pickaxe", cmd_blame
, RUN_SETUP
},
364 { "prune", cmd_prune
, RUN_SETUP
},
365 { "prune-packed", cmd_prune_packed
, RUN_SETUP
},
366 { "push", cmd_push
, RUN_SETUP
},
367 { "read-tree", cmd_read_tree
, RUN_SETUP
},
368 { "reflog", cmd_reflog
, RUN_SETUP
},
369 { "repo-config", cmd_config
},
370 { "rerere", cmd_rerere
, RUN_SETUP
},
371 { "rev-list", cmd_rev_list
, RUN_SETUP
},
372 { "rev-parse", cmd_rev_parse
, RUN_SETUP
},
373 { "revert", cmd_revert
, RUN_SETUP
| NEED_WORK_TREE
},
374 { "rm", cmd_rm
, RUN_SETUP
| NEED_WORK_TREE
},
375 { "runstatus", cmd_runstatus
, RUN_SETUP
| NEED_WORK_TREE
},
376 { "shortlog", cmd_shortlog
, RUN_SETUP
| USE_PAGER
},
377 { "show-branch", cmd_show_branch
, RUN_SETUP
},
378 { "show", cmd_show
, RUN_SETUP
| USE_PAGER
},
379 { "stripspace", cmd_stripspace
},
380 { "symbolic-ref", cmd_symbolic_ref
, RUN_SETUP
},
381 { "tag", cmd_tag
, RUN_SETUP
},
382 { "tar-tree", cmd_tar_tree
},
383 { "unpack-objects", cmd_unpack_objects
, RUN_SETUP
},
384 { "update-index", cmd_update_index
, RUN_SETUP
},
385 { "update-ref", cmd_update_ref
, RUN_SETUP
},
386 { "upload-archive", cmd_upload_archive
},
387 { "verify-tag", cmd_verify_tag
, RUN_SETUP
},
388 { "version", cmd_version
},
389 { "whatchanged", cmd_whatchanged
, RUN_SETUP
| USE_PAGER
},
390 { "write-tree", cmd_write_tree
, RUN_SETUP
},
391 { "verify-pack", cmd_verify_pack
},
392 { "show-ref", cmd_show_ref
, RUN_SETUP
},
393 { "pack-refs", cmd_pack_refs
, RUN_SETUP
},
397 #ifdef STRIP_EXTENSION
398 i
= strlen(argv
[0]) - strlen(STRIP_EXTENSION
);
399 if (i
> 0 && !strcmp(argv
[0] + i
, STRIP_EXTENSION
)) {
400 char *argv0
= strdup(argv
[0]);
401 argv
[0] = cmd
= argv0
;
406 /* Turn "git cmd --help" into "git help cmd" */
407 if (argc
> 1 && !strcmp(argv
[1], "--help")) {
409 argv
[0] = cmd
= "help";
412 for (i
= 0; i
< ARRAY_SIZE(commands
); i
++) {
413 struct cmd_struct
*p
= commands
+i
;
414 if (strcmp(p
->cmd
, cmd
))
416 exit(run_command(p
, argc
, argv
));
420 int main(int argc
, const char **argv
)
422 const char *cmd
= argv
[0] ? argv
[0] : "git-help";
423 char *slash
= strrchr(cmd
, '/');
424 const char *exec_path
= NULL
;
428 * Take the basename of argv[0] as the command
429 * name, and the dirname as the default exec_path
430 * if it's an absolute path and we don't have
435 slash
= strrchr(cmd
, '\\');
439 if (is_absolute_path(cmd
))
445 * "git-xxxx" is the same as "git xxxx", but we obviously:
447 * - cannot take flags in between the "git" and the "xxxx".
448 * - cannot execute it externally (since it would just do
449 * the same thing over again)
451 * So we just directly call the internal command handler, and
452 * die if that one cannot handle it.
454 if (!prefixcmp(cmd
, "git-")) {
457 handle_internal_command(argc
, argv
);
458 die("cannot handle %s internally", cmd
);
461 /* Look for flags.. */
464 handle_options(&argv
, &argc
, NULL
);
466 if (!prefixcmp(argv
[0], "--"))
469 /* Default command: "help" */
476 * We execute external git command via execv_git_cmd(),
477 * which looks at "--exec-path" option, GIT_EXEC_PATH
478 * environment, and $(gitexecdir) in Makefile while built,
479 * in this order. For scripted commands, we prepend
480 * the value of the exec_path variable to the PATH.
483 prepend_to_path(exec_path
, strlen(exec_path
));
484 exec_path
= git_exec_path();
485 prepend_to_path(exec_path
, strlen(exec_path
));
488 /* See if it's an internal command */
489 handle_internal_command(argc
, argv
);
491 /* .. then try the external ones */
494 /* It could be an alias -- this works around the insanity
495 * of overriding "git log" with "git show" by having
498 if (done_alias
|| !handle_alias(&argc
, &argv
))
503 if (errno
== ENOENT
) {
505 fprintf(stderr
, "Expansion of alias '%s' failed; "
506 "'%s' is not a git-command\n",
510 help_unknown_cmd(cmd
);
513 fprintf(stderr
, "Failed to run command '%s': %s\n",
514 cmd
, strerror(errno
));