11 #include "git-compat-util.h"
17 static void prepend_to_path(const char *dir, int len)
19 char *path, *old_path = getenv("PATH");
23 old_path = "/usr/local/bin:/usr/bin:/bin";
25 path_len = len + strlen(old_path) + 1;
27 path = malloc(path_len + 1);
29 memcpy(path, dir, len);
31 memcpy(path + len + 1, old_path, path_len - len);
33 setenv("PATH", path, 1);
36 static const char *alias_command;
37 static char *alias_string = NULL;
39 static int git_alias_config(const char *var, const char *value)
41 if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) {
42 alias_string = strdup(value);
47 static int split_cmdline(char *cmdline, const char ***argv)
49 int src, dst, count = 0, size = 16;
52 *argv = malloc(sizeof(char*) * size);
54 /* split alias_string */
55 (*argv)[count++] = cmdline;
56 for (src = dst = 0; cmdline[src];) {
57 char c = cmdline[src];
58 if (!quoted && isspace(c)) {
61 && isspace(cmdline[src]))
65 *argv = realloc(*argv, sizeof(char*) * size);
67 (*argv)[count++] = cmdline + dst;
68 } else if(!quoted && (c == '\'' || c == '"')) {
71 } else if (c == quoted) {
75 if (c == '\\' && quoted != '\'') {
81 return error("cmdline ends with \\");
94 return error("unclosed quote");
100 static int handle_alias(int *argcp, const char ***argv)
102 int nongit = 0, ret = 0;
105 subdir = setup_git_directory_gently(&nongit);
108 const char** new_argv;
110 alias_command = (*argv)[0];
111 git_config(git_alias_config);
114 count = split_cmdline(alias_string, &new_argv);
117 die("empty alias for %s", alias_command);
119 if (!strcmp(alias_command, new_argv[0]))
120 die("recursive alias: %s", alias_command);
122 /* insert after command name */
124 new_argv = realloc(new_argv, sizeof(char*) *
126 memcpy(new_argv + count, *argv + 1,
127 sizeof(char*) * *argcp);
143 const char git_version_string[] = GIT_VERSION;
145 static void handle_internal_command(int argc, const char **argv, char **envp)
147 const char *cmd = argv[0];
148 static struct cmd_struct {
150 int (*fn)(int, const char **, char **);
152 { "version", cmd_version },
153 { "help", cmd_help },
155 { "whatchanged", cmd_whatchanged },
156 { "show", cmd_show },
157 { "push", cmd_push },
158 { "format-patch", cmd_format_patch },
159 { "count-objects", cmd_count_objects },
160 { "diff", cmd_diff },
161 { "grep", cmd_grep },
164 { "rev-list", cmd_rev_list },
165 { "init-db", cmd_init_db },
166 { "get-tar-commit-id", cmd_get_tar_commit_id },
167 { "upload-tar", cmd_upload_tar },
168 { "check-ref-format", cmd_check_ref_format },
169 { "ls-files", cmd_ls_files },
170 { "ls-tree", cmd_ls_tree },
171 { "tar-tree", cmd_tar_tree },
172 { "read-tree", cmd_read_tree },
173 { "commit-tree", cmd_commit_tree },
174 { "apply", cmd_apply },
175 { "show-branch", cmd_show_branch },
176 { "diff-files", cmd_diff_files },
177 { "diff-index", cmd_diff_index },
178 { "diff-stages", cmd_diff_stages },
179 { "diff-tree", cmd_diff_tree },
180 { "cat-file", cmd_cat_file },
181 { "rev-parse", cmd_rev_parse },
182 { "write-tree", cmd_write_tree },
183 { "mailsplit", cmd_mailsplit },
184 { "mailinfo", cmd_mailinfo },
185 { "stripspace", cmd_stripspace },
186 { "update-index", cmd_update_index },
187 { "update-ref", cmd_update_ref }
191 /* Turn "git cmd --help" into "git help cmd" */
192 if (argc > 1 && !strcmp(argv[1], "--help")) {
194 argv[0] = cmd = "help";
197 for (i = 0; i < ARRAY_SIZE(commands); i++) {
198 struct cmd_struct *p = commands+i;
199 if (strcmp(p->cmd, cmd))
201 exit(p->fn(argc, argv, envp));
205 int main(int argc, const char **argv, char **envp)
207 const char *cmd = argv[0];
208 char *slash = strrchr(cmd, '/');
209 const char *exec_path = NULL;
213 * Take the basename of argv[0] as the command
214 * name, and the dirname as the default exec_path
215 * if it's an absolute path and we don't have
226 * "git-xxxx" is the same as "git xxxx", but we obviously:
228 * - cannot take flags in between the "git" and the "xxxx".
229 * - cannot execute it externally (since it would just do
230 * the same thing over again)
232 * So we just directly call the internal command handler, and
233 * die if that one cannot handle it.
235 if (!strncmp(cmd, "git-", 4)) {
238 handle_internal_command(argc, argv, envp);
239 die("cannot handle %s internally", cmd);
242 /* Default command: "help" */
245 /* Look for flags.. */
250 if (strncmp(cmd, "--", 2))
256 * For legacy reasons, the "version" and "help"
257 * commands can be written with "--" prepended
258 * to make them look like flags.
260 if (!strcmp(cmd, "help"))
262 if (!strcmp(cmd, "version"))
266 * Check remaining flags (which by now must be
267 * "--exec-path", but maybe we will accept
268 * other arguments some day)
270 if (!strncmp(cmd, "exec-path", 9)) {
273 git_set_exec_path(cmd + 1);
276 puts(git_exec_path());
279 cmd_usage(0, NULL, NULL);
284 * We search for git commands in the following order:
286 * - the path of the "git" command if we could find it
288 * - the regular PATH.
291 prepend_to_path(exec_path, strlen(exec_path));
292 exec_path = git_exec_path();
293 prepend_to_path(exec_path, strlen(exec_path));
296 /* See if it's an internal command */
297 handle_internal_command(argc, argv, envp);
299 /* .. then try the external ones */
302 /* It could be an alias -- this works around the insanity
303 * of overriding "git log" with "git show" by having
306 if (done_alias || !handle_alias(&argc, &argv))
312 cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
314 fprintf(stderr, "Failed to run command '%s': %s\n",
315 cmd, strerror(errno));