11 #include "git-compat-util.h"
18 static void prepend_to_path(const char *dir, int len)
20 const char *old_path = getenv("PATH");
25 old_path = "/usr/local/bin:/usr/bin:/bin";
27 path_len = len + strlen(old_path) + 1;
29 path = malloc(path_len + 1);
31 memcpy(path, dir, len);
33 memcpy(path + len + 1, old_path, path_len - len);
35 setenv("PATH", path, 1);
38 static int handle_options(const char*** argv, int* argc)
43 const char *cmd = (*argv)[0];
48 * For legacy reasons, the "version" and "help"
49 * commands can be written with "--" prepended
50 * to make them look like flags.
52 if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
56 * Check remaining flags.
58 if (!strncmp(cmd, "--exec-path", 11)) {
61 git_set_exec_path(cmd + 1);
63 puts(git_exec_path());
66 } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
68 } else if (!strcmp(cmd, "--git-dir")) {
71 setenv("GIT_DIR", (*argv)[1], 1);
74 } else if (!strncmp(cmd, "--git-dir=", 10)) {
75 setenv("GIT_DIR", cmd + 10, 1);
76 } else if (!strcmp(cmd, "--bare")) {
77 static char git_dir[1024];
78 setenv("GIT_DIR", getcwd(git_dir, 1024), 1);
80 fprintf(stderr, "Unknown option: %s\n", cmd);
81 cmd_usage(0, NULL, NULL);
91 static const char *alias_command;
92 static char *alias_string = NULL;
94 static int git_alias_config(const char *var, const char *value)
96 if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) {
97 alias_string = strdup(value);
102 static int split_cmdline(char *cmdline, const char ***argv)
104 int src, dst, count = 0, size = 16;
107 *argv = malloc(sizeof(char*) * size);
109 /* split alias_string */
110 (*argv)[count++] = cmdline;
111 for (src = dst = 0; cmdline[src];) {
112 char c = cmdline[src];
113 if (!quoted && isspace(c)) {
115 while (cmdline[++src]
116 && isspace(cmdline[src]))
120 *argv = realloc(*argv, sizeof(char*) * size);
122 (*argv)[count++] = cmdline + dst;
123 } else if(!quoted && (c == '\'' || c == '"')) {
126 } else if (c == quoted) {
130 if (c == '\\' && quoted != '\'') {
136 return error("cmdline ends with \\");
149 return error("unclosed quote");
155 static int handle_alias(int *argcp, const char ***argv)
157 int nongit = 0, ret = 0, saved_errno = errno;
160 subdir = setup_git_directory_gently(&nongit);
162 int count, option_count;
163 const char** new_argv;
165 alias_command = (*argv)[0];
166 git_config(git_alias_config);
169 count = split_cmdline(alias_string, &new_argv);
170 option_count = handle_options(&new_argv, &count);
171 memmove(new_argv - option_count, new_argv,
172 count * sizeof(char *));
173 new_argv -= option_count;
176 die("empty alias for %s", alias_command);
178 if (!strcmp(alias_command, new_argv[0]))
179 die("recursive alias: %s", alias_command);
181 if (getenv("GIT_TRACE")) {
183 fprintf(stderr, "trace: alias expansion: %s =>",
185 for (i = 0; i < count; ++i) {
187 sq_quote_print(stderr, new_argv[i]);
193 new_argv = realloc(new_argv, sizeof(char*) *
194 (count + *argcp + 1));
195 /* insert after command name */
196 memcpy(new_argv + count, *argv + 1,
197 sizeof(char*) * *argcp);
198 new_argv[count+*argcp] = NULL;
215 const char git_version_string[] = GIT_VERSION;
217 static void handle_internal_command(int argc, const char **argv, char **envp)
219 const char *cmd = argv[0];
220 static struct cmd_struct {
222 int (*fn)(int, const char **, char **);
224 { "version", cmd_version },
225 { "help", cmd_help },
227 { "whatchanged", cmd_whatchanged },
228 { "show", cmd_show },
229 { "push", cmd_push },
230 { "format-patch", cmd_format_patch },
231 { "count-objects", cmd_count_objects },
232 { "diff", cmd_diff },
233 { "grep", cmd_grep },
236 { "rev-list", cmd_rev_list },
237 { "init-db", cmd_init_db },
238 { "get-tar-commit-id", cmd_get_tar_commit_id },
239 { "upload-tar", cmd_upload_tar },
240 { "check-ref-format", cmd_check_ref_format },
241 { "ls-files", cmd_ls_files },
242 { "ls-tree", cmd_ls_tree },
243 { "tar-tree", cmd_tar_tree },
244 { "read-tree", cmd_read_tree },
245 { "commit-tree", cmd_commit_tree },
246 { "apply", cmd_apply },
247 { "show-branch", cmd_show_branch },
248 { "diff-files", cmd_diff_files },
249 { "diff-index", cmd_diff_index },
250 { "diff-stages", cmd_diff_stages },
251 { "diff-tree", cmd_diff_tree },
252 { "cat-file", cmd_cat_file },
253 { "rev-parse", cmd_rev_parse },
254 { "write-tree", cmd_write_tree },
255 { "mailsplit", cmd_mailsplit },
256 { "mailinfo", cmd_mailinfo },
257 { "stripspace", cmd_stripspace },
258 { "update-index", cmd_update_index },
259 { "update-ref", cmd_update_ref },
260 { "fmt-merge-msg", cmd_fmt_merge_msg },
261 { "prune", cmd_prune },
265 /* Turn "git cmd --help" into "git help cmd" */
266 if (argc > 1 && !strcmp(argv[1], "--help")) {
268 argv[0] = cmd = "help";
271 for (i = 0; i < ARRAY_SIZE(commands); i++) {
272 struct cmd_struct *p = commands+i;
273 if (strcmp(p->cmd, cmd))
276 if (getenv("GIT_TRACE")) {
278 fprintf(stderr, "trace: built-in: git");
279 for (i = 0; i < argc; ++i) {
281 sq_quote_print(stderr, argv[i]);
287 exit(p->fn(argc, argv, envp));
291 int main(int argc, const char **argv, char **envp)
293 const char *cmd = argv[0];
294 char *slash = strrchr(cmd, '/');
295 const char *exec_path = NULL;
299 * Take the basename of argv[0] as the command
300 * name, and the dirname as the default exec_path
301 * if it's an absolute path and we don't have
312 * "git-xxxx" is the same as "git xxxx", but we obviously:
314 * - cannot take flags in between the "git" and the "xxxx".
315 * - cannot execute it externally (since it would just do
316 * the same thing over again)
318 * So we just directly call the internal command handler, and
319 * die if that one cannot handle it.
321 if (!strncmp(cmd, "git-", 4)) {
324 handle_internal_command(argc, argv, envp);
325 die("cannot handle %s internally", cmd);
328 /* Look for flags.. */
331 handle_options(&argv, &argc);
333 if (!strncmp(argv[0], "--", 2))
336 /* Default command: "help" */
343 * We search for git commands in the following order:
345 * - the path of the "git" command if we could find it
347 * - the regular PATH.
350 prepend_to_path(exec_path, strlen(exec_path));
351 exec_path = git_exec_path();
352 prepend_to_path(exec_path, strlen(exec_path));
355 /* See if it's an internal command */
356 handle_internal_command(argc, argv, envp);
358 /* .. then try the external ones */
361 /* It could be an alias -- this works around the insanity
362 * of overriding "git log" with "git show" by having
365 if (done_alias || !handle_alias(&argc, &argv))
371 cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
373 fprintf(stderr, "Failed to run command '%s': %s\n",
374 cmd, strerror(errno));