11 #include "git-compat-util.h"
16 static void prepend_to_path(const char *dir, int len)
18 char *path, *old_path = getenv("PATH");
22 old_path = "/usr/local/bin:/usr/bin:/bin";
24 path_len = len + strlen(old_path) + 1;
26 path = malloc(path_len + 1);
28 memcpy(path, dir, len);
30 memcpy(path + len + 1, old_path, path_len - len);
32 setenv("PATH", path, 1);
35 const char git_version_string[] = GIT_VERSION;
37 static void handle_internal_command(int argc, const char **argv, char **envp)
39 const char *cmd = argv[0];
40 static struct cmd_struct {
42 int (*fn)(int, const char **, char **);
44 { "version", cmd_version },
47 { "whatchanged", cmd_whatchanged },
50 { "count-objects", cmd_count_objects },
53 { "rev-list", cmd_rev_list },
54 { "init-db", cmd_init_db },
55 { "check-ref-format", cmd_check_ref_format },
56 { "ls-files", cmd_ls_files },
57 { "ls-tree", cmd_ls_tree },
58 { "tar-tree", cmd_tar_tree },
59 { "read-tree", cmd_read_tree },
60 { "commit-tree", cmd_commit_tree },
61 { "apply", cmd_apply },
62 { "show-branch", cmd_show_branch }
66 /* Turn "git cmd --help" into "git help cmd" */
67 if (argc > 1 && !strcmp(argv[1], "--help")) {
69 argv[0] = cmd = "help";
72 for (i = 0; i < ARRAY_SIZE(commands); i++) {
73 struct cmd_struct *p = commands+i;
74 if (strcmp(p->cmd, cmd))
76 exit(p->fn(argc, argv, envp));
80 int main(int argc, const char **argv, char **envp)
82 const char *cmd = argv[0];
83 char *slash = strrchr(cmd, '/');
84 char git_command[PATH_MAX + 1];
85 const char *exec_path = NULL;
88 * Take the basename of argv[0] as the command
89 * name, and the dirname as the default exec_path
90 * if it's an absolute path and we don't have
101 * "git-xxxx" is the same as "git xxxx", but we obviously:
103 * - cannot take flags in between the "git" and the "xxxx".
104 * - cannot execute it externally (since it would just do
105 * the same thing over again)
107 * So we just directly call the internal command handler, and
108 * die if that one cannot handle it.
110 if (!strncmp(cmd, "git-", 4)) {
113 handle_internal_command(argc, argv, envp);
114 die("cannot handle %s internally", cmd);
117 /* Default command: "help" */
120 /* Look for flags.. */
125 if (strncmp(cmd, "--", 2))
131 * For legacy reasons, the "version" and "help"
132 * commands can be written with "--" prepended
133 * to make them look like flags.
135 if (!strcmp(cmd, "help"))
137 if (!strcmp(cmd, "version"))
141 * Check remaining flags (which by now must be
142 * "--exec-path", but maybe we will accept
143 * other arguments some day)
145 if (!strncmp(cmd, "exec-path", 9)) {
148 git_set_exec_path(cmd + 1);
151 puts(git_exec_path());
154 cmd_usage(0, NULL, NULL);
159 * We search for git commands in the following order:
161 * - the path of the "git" command if we could find it
163 * - the regular PATH.
166 prepend_to_path(exec_path, strlen(exec_path));
167 exec_path = git_exec_path();
168 prepend_to_path(exec_path, strlen(exec_path));
170 /* See if it's an internal command */
171 handle_internal_command(argc, argv, envp);
173 /* .. then try the external ones */
177 cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
179 fprintf(stderr, "Failed to run command '%s': %s\n",
180 git_command, strerror(errno));