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 },
49 { "fmt-patch", cmd_format_patch },
50 { "count-objects", cmd_count_objects },
54 /* Turn "git cmd --help" into "git help cmd" */
55 if (argc > 1 && !strcmp(argv[1], "--help")) {
57 argv[0] = cmd = "help";
60 for (i = 0; i < ARRAY_SIZE(commands); i++) {
61 struct cmd_struct *p = commands+i;
62 if (strcmp(p->cmd, cmd))
64 exit(p->fn(argc, argv, envp));
68 int main(int argc, const char **argv, char **envp)
70 const char *cmd = argv[0];
71 char *slash = strrchr(cmd, '/');
72 char git_command[PATH_MAX + 1];
73 const char *exec_path = NULL;
76 * Take the basename of argv[0] as the command
77 * name, and the dirname as the default exec_path
78 * if it's an absolute path and we don't have
89 * "git-xxxx" is the same as "git xxxx", but we obviously:
91 * - cannot take flags in between the "git" and the "xxxx".
92 * - cannot execute it externally (since it would just do
93 * the same thing over again)
95 * So we just directly call the internal command handler, and
96 * die if that one cannot handle it.
98 if (!strncmp(cmd, "git-", 4)) {
101 handle_internal_command(argc, argv, envp);
102 die("cannot handle %s internally", cmd);
105 /* Default command: "help" */
108 /* Look for flags.. */
113 if (strncmp(cmd, "--", 2))
119 * For legacy reasons, the "version" and "help"
120 * commands can be written with "--" prepended
121 * to make them look like flags.
123 if (!strcmp(cmd, "help"))
125 if (!strcmp(cmd, "version"))
129 * Check remaining flags (which by now must be
130 * "--exec-path", but maybe we will accept
131 * other arguments some day)
133 if (!strncmp(cmd, "exec-path", 9)) {
136 git_set_exec_path(cmd + 1);
139 puts(git_exec_path());
142 cmd_usage(0, NULL, NULL);
147 * We search for git commands in the following order:
149 * - the path of the "git" command if we could find it
151 * - the regular PATH.
154 prepend_to_path(exec_path, strlen(exec_path));
155 exec_path = git_exec_path();
156 prepend_to_path(exec_path, strlen(exec_path));
158 /* See if it's an internal command */
159 handle_internal_command(argc, argv, envp);
161 /* .. then try the external ones */
165 cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
167 fprintf(stderr, "Failed to run command '%s': %s\n",
168 git_command, strerror(errno));