6 const char git_usage_string
[] =
7 "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate] [--bare] [--git-dir=GIT_DIR] [--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
)
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 (!strncmp(cmd
, "--exec-path", 11)) {
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
, "--git-dir")) {
67 fprintf(stderr
, "No directory given for --git-dir.\n" );
68 usage(git_usage_string
);
70 setenv(GIT_DIR_ENVIRONMENT
, (*argv
)[1], 1);
73 } else if (!strncmp(cmd
, "--git-dir=", 10)) {
74 setenv(GIT_DIR_ENVIRONMENT
, cmd
+ 10, 1);
75 } else if (!strcmp(cmd
, "--bare")) {
76 static char git_dir
[PATH_MAX
+1];
77 setenv(GIT_DIR_ENVIRONMENT
, getcwd(git_dir
, sizeof(git_dir
)), 1);
79 fprintf(stderr
, "Unknown option: %s\n", cmd
);
80 usage(git_usage_string
);
90 static const char *alias_command
;
91 static char *alias_string
;
93 static int git_alias_config(const char *var
, const char *value
)
95 if (!strncmp(var
, "alias.", 6) && !strcmp(var
+ 6, alias_command
)) {
96 alias_string
= xstrdup(value
);
101 static int split_cmdline(char *cmdline
, const char ***argv
)
103 int src
, dst
, count
= 0, size
= 16;
106 *argv
= malloc(sizeof(char*) * size
);
108 /* split alias_string */
109 (*argv
)[count
++] = cmdline
;
110 for (src
= dst
= 0; cmdline
[src
];) {
111 char c
= cmdline
[src
];
112 if (!quoted
&& isspace(c
)) {
114 while (cmdline
[++src
]
115 && isspace(cmdline
[src
]))
119 *argv
= xrealloc(*argv
, sizeof(char*) * size
);
121 (*argv
)[count
++] = cmdline
+ dst
;
122 } else if(!quoted
&& (c
== '\'' || c
== '"')) {
125 } else if (c
== quoted
) {
129 if (c
== '\\' && quoted
!= '\'') {
135 return error("cmdline ends with \\");
148 return error("unclosed quote");
154 static int handle_alias(int *argcp
, const char ***argv
)
156 int nongit
= 0, ret
= 0, saved_errno
= errno
;
158 int count
, option_count
;
159 const char** new_argv
;
161 subdir
= setup_git_directory_gently(&nongit
);
163 alias_command
= (*argv
)[0];
164 git_config(git_alias_config
);
166 count
= split_cmdline(alias_string
, &new_argv
);
167 option_count
= handle_options(&new_argv
, &count
);
168 memmove(new_argv
- option_count
, new_argv
,
169 count
* sizeof(char *));
170 new_argv
-= option_count
;
173 die("empty alias for %s", alias_command
);
175 if (!strcmp(alias_command
, new_argv
[0]))
176 die("recursive alias: %s", alias_command
);
178 trace_argv_printf(new_argv
, count
,
179 "trace: alias expansion: %s =>",
182 new_argv
= xrealloc(new_argv
, sizeof(char*) *
183 (count
+ *argcp
+ 1));
184 /* insert after command name */
185 memcpy(new_argv
+ count
, *argv
+ 1, sizeof(char*) * *argcp
);
186 new_argv
[count
+*argcp
] = NULL
;
202 const char git_version_string
[] = GIT_VERSION
;
204 #define RUN_SETUP (1<<0)
205 #define USE_PAGER (1<<1)
207 * require working tree to be present -- anything uses this needs
208 * RUN_SETUP for reading from the configuration file.
210 #define NOT_BARE (1<<2)
212 static void handle_internal_command(int argc
, const char **argv
, char **envp
)
214 const char *cmd
= argv
[0];
215 static struct cmd_struct
{
217 int (*fn
)(int, const char **, const char *);
220 { "add", cmd_add
, RUN_SETUP
| NOT_BARE
},
221 { "annotate", cmd_annotate
, },
222 { "apply", cmd_apply
},
223 { "archive", cmd_archive
},
224 { "blame", cmd_blame
, RUN_SETUP
| USE_PAGER
},
225 { "branch", cmd_branch
, RUN_SETUP
},
226 { "cat-file", cmd_cat_file
, RUN_SETUP
},
227 { "checkout-index", cmd_checkout_index
, RUN_SETUP
},
228 { "check-ref-format", cmd_check_ref_format
},
229 { "cherry", cmd_cherry
, RUN_SETUP
},
230 { "commit-tree", cmd_commit_tree
, RUN_SETUP
},
231 { "count-objects", cmd_count_objects
, RUN_SETUP
},
232 { "describe", cmd_describe
, RUN_SETUP
},
233 { "diff", cmd_diff
, RUN_SETUP
| USE_PAGER
},
234 { "diff-files", cmd_diff_files
, RUN_SETUP
},
235 { "diff-index", cmd_diff_index
, RUN_SETUP
},
236 { "diff-stages", cmd_diff_stages
, RUN_SETUP
},
237 { "diff-tree", cmd_diff_tree
, RUN_SETUP
},
238 { "fmt-merge-msg", cmd_fmt_merge_msg
, RUN_SETUP
},
239 { "for-each-ref", cmd_for_each_ref
, RUN_SETUP
},
240 { "format-patch", cmd_format_patch
, RUN_SETUP
},
241 { "get-tar-commit-id", cmd_get_tar_commit_id
},
242 { "grep", cmd_grep
, RUN_SETUP
},
243 { "help", cmd_help
},
244 { "init", cmd_init_db
},
245 { "init-db", cmd_init_db
},
246 { "log", cmd_log
, RUN_SETUP
| USE_PAGER
},
247 { "ls-files", cmd_ls_files
, RUN_SETUP
},
248 { "ls-tree", cmd_ls_tree
, RUN_SETUP
},
249 { "mailinfo", cmd_mailinfo
},
250 { "mailsplit", cmd_mailsplit
},
251 { "merge-base", cmd_merge_base
, RUN_SETUP
},
252 { "merge-file", cmd_merge_file
},
253 { "mv", cmd_mv
, RUN_SETUP
| NOT_BARE
},
254 { "name-rev", cmd_name_rev
, RUN_SETUP
},
255 { "pack-objects", cmd_pack_objects
, RUN_SETUP
},
256 { "pickaxe", cmd_blame
, RUN_SETUP
| USE_PAGER
},
257 { "prune", cmd_prune
, RUN_SETUP
},
258 { "prune-packed", cmd_prune_packed
, RUN_SETUP
},
259 { "push", cmd_push
, RUN_SETUP
},
260 { "read-tree", cmd_read_tree
, RUN_SETUP
},
261 { "reflog", cmd_reflog
, RUN_SETUP
},
262 { "repo-config", cmd_repo_config
},
263 { "rerere", cmd_rerere
, RUN_SETUP
},
264 { "rev-list", cmd_rev_list
, RUN_SETUP
},
265 { "rev-parse", cmd_rev_parse
, RUN_SETUP
},
266 { "rm", cmd_rm
, RUN_SETUP
| NOT_BARE
},
267 { "runstatus", cmd_runstatus
, RUN_SETUP
| NOT_BARE
},
268 { "shortlog", cmd_shortlog
, RUN_SETUP
| USE_PAGER
},
269 { "show-branch", cmd_show_branch
, RUN_SETUP
},
270 { "show", cmd_show
, RUN_SETUP
| USE_PAGER
},
271 { "stripspace", cmd_stripspace
},
272 { "symbolic-ref", cmd_symbolic_ref
, RUN_SETUP
},
273 { "tar-tree", cmd_tar_tree
},
274 { "unpack-objects", cmd_unpack_objects
, RUN_SETUP
},
275 { "update-index", cmd_update_index
, RUN_SETUP
},
276 { "update-ref", cmd_update_ref
, RUN_SETUP
},
277 { "upload-archive", cmd_upload_archive
},
278 { "version", cmd_version
},
279 { "whatchanged", cmd_whatchanged
, RUN_SETUP
| USE_PAGER
},
280 { "write-tree", cmd_write_tree
, RUN_SETUP
},
281 { "verify-pack", cmd_verify_pack
},
282 { "show-ref", cmd_show_ref
, RUN_SETUP
},
283 { "pack-refs", cmd_pack_refs
, RUN_SETUP
},
287 #ifdef STRIP_EXTENSION
288 i
= strlen(argv
[0]) - strlen(STRIP_EXTENSION
);
289 if (i
> 0 && !strcmp(argv
[0] + i
, STRIP_EXTENSION
)) {
290 char *argv0
= strdup(argv
[0]);
291 argv
[0] = cmd
= argv0
;
296 /* Turn "git cmd --help" into "git help cmd" */
297 if (argc
> 1 && !strcmp(argv
[1], "--help")) {
299 argv
[0] = cmd
= "help";
302 for (i
= 0; i
< ARRAY_SIZE(commands
); i
++) {
303 struct cmd_struct
*p
= commands
+i
;
305 if (strcmp(p
->cmd
, cmd
))
309 if (p
->option
& RUN_SETUP
)
310 prefix
= setup_git_directory();
311 if (p
->option
& USE_PAGER
)
313 if ((p
->option
& NOT_BARE
) && is_bare_repository())
314 die("%s cannot be used in a bare git directory", cmd
);
315 trace_argv_printf(argv
, argc
, "trace: built-in: git");
317 exit(p
->fn(argc
, argv
, prefix
));
321 int main(int argc
, const char **argv
, char **envp
)
323 const char *cmd
= argv
[0] ? argv
[0] : "git-help";
324 char *slash
= strrchr(cmd
, '/');
325 const char *exec_path
= NULL
;
329 * Take the basename of argv[0] as the command
330 * name, and the dirname as the default exec_path
331 * if it's an absolute path and we don't have
342 slash
= strrchr(cmd
, '\\');
352 * "git-xxxx" is the same as "git xxxx", but we obviously:
354 * - cannot take flags in between the "git" and the "xxxx".
355 * - cannot execute it externally (since it would just do
356 * the same thing over again)
358 * So we just directly call the internal command handler, and
359 * die if that one cannot handle it.
361 if (!strncmp(cmd
, "git-", 4)) {
364 handle_internal_command(argc
, argv
, envp
);
365 die("cannot handle %s internally", cmd
);
368 /* Look for flags.. */
371 handle_options(&argv
, &argc
);
373 if (!strncmp(argv
[0], "--", 2))
376 /* Default command: "help" */
383 * We search for git commands in the following order:
385 * - the path of the "git" command if we could find it
387 * - the regular PATH.
390 prepend_to_path(exec_path
, strlen(exec_path
));
391 exec_path
= git_exec_path();
392 prepend_to_path(exec_path
, strlen(exec_path
));
395 /* See if it's an internal command */
396 handle_internal_command(argc
, argv
, envp
);
398 /* .. then try the external ones */
401 /* It could be an alias -- this works around the insanity
402 * of overriding "git log" with "git show" by having
405 if (done_alias
|| !handle_alias(&argc
, &argv
))
411 help_unknown_cmd(cmd
);
413 fprintf(stderr
, "Failed to run command '%s': %s\n",
414 cmd
, strerror(errno
));