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 { "fmt-patch", cmd_format_patch },
51 { "count-objects", cmd_count_objects },
58 /* Turn "git cmd --help" into "git help cmd" */
59 if (argc > 1 && !strcmp(argv[1], "--help")) {
61 argv[0] = cmd = "help";
64 for (i = 0; i < ARRAY_SIZE(commands); i++) {
65 struct cmd_struct *p = commands+i;
66 if (strcmp(p->cmd, cmd))
68 exit(p->fn(argc, argv, envp));
72 int main(int argc, const char **argv, char **envp)
74 const char *cmd = argv[0];
75 char *slash = strrchr(cmd, '/');
76 char git_command[PATH_MAX + 1];
77 const char *exec_path = NULL;
80 * Take the basename of argv[0] as the command
81 * name, and the dirname as the default exec_path
82 * if it's an absolute path and we don't have
93 * "git-xxxx" is the same as "git xxxx", but we obviously:
95 * - cannot take flags in between the "git" and the "xxxx".
96 * - cannot execute it externally (since it would just do
97 * the same thing over again)
99 * So we just directly call the internal command handler, and
100 * die if that one cannot handle it.
102 if (!strncmp(cmd, "git-", 4)) {
105 handle_internal_command(argc, argv, envp);
106 die("cannot handle %s internally", cmd);
109 /* Default command: "help" */
112 /* Look for flags.. */
117 if (strncmp(cmd, "--", 2))
123 * For legacy reasons, the "version" and "help"
124 * commands can be written with "--" prepended
125 * to make them look like flags.
127 if (!strcmp(cmd, "help"))
129 if (!strcmp(cmd, "version"))
133 * Check remaining flags (which by now must be
134 * "--exec-path", but maybe we will accept
135 * other arguments some day)
137 if (!strncmp(cmd, "exec-path", 9)) {
140 git_set_exec_path(cmd + 1);
143 puts(git_exec_path());
146 cmd_usage(0, NULL, NULL);
151 * We search for git commands in the following order:
153 * - the path of the "git" command if we could find it
155 * - the regular PATH.
158 prepend_to_path(exec_path, strlen(exec_path));
159 exec_path = git_exec_path();
160 prepend_to_path(exec_path, strlen(exec_path));
162 /* See if it's an internal command */
163 handle_internal_command(argc, argv, envp);
165 /* .. then try the external ones */
169 cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
171 fprintf(stderr, "Failed to run command '%s': %s\n",
172 git_command, strerror(errno));