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
},
56 /* Turn "git cmd --help" into "git help cmd" */
57 if (argc
> 1 && !strcmp(argv
[1], "--help")) {
59 argv
[0] = cmd
= "help";
62 for (i
= 0; i
< ARRAY_SIZE(commands
); i
++) {
63 struct cmd_struct
*p
= commands
+i
;
64 if (strcmp(p
->cmd
, cmd
))
66 exit(p
->fn(argc
, argv
, envp
));
70 int main(int argc
, const char **argv
, char **envp
)
72 const char *cmd
= argv
[0];
73 char *slash
= strrchr(cmd
, '/');
74 char git_command
[PATH_MAX
+ 1];
75 const char *exec_path
= NULL
;
78 * Take the basename of argv[0] as the command
79 * name, and the dirname as the default exec_path
80 * if it's an absolute path and we don't have
91 * "git-xxxx" is the same as "git xxxx", but we obviously:
93 * - cannot take flags in between the "git" and the "xxxx".
94 * - cannot execute it externally (since it would just do
95 * the same thing over again)
97 * So we just directly call the internal command handler, and
98 * die if that one cannot handle it.
100 if (!strncmp(cmd
, "git-", 4)) {
103 handle_internal_command(argc
, argv
, envp
);
104 die("cannot handle %s internally", cmd
);
107 /* Default command: "help" */
110 /* Look for flags.. */
115 if (strncmp(cmd
, "--", 2))
121 * For legacy reasons, the "version" and "help"
122 * commands can be written with "--" prepended
123 * to make them look like flags.
125 if (!strcmp(cmd
, "help"))
127 if (!strcmp(cmd
, "version"))
131 * Check remaining flags (which by now must be
132 * "--exec-path", but maybe we will accept
133 * other arguments some day)
135 if (!strncmp(cmd
, "exec-path", 9)) {
138 git_set_exec_path(cmd
+ 1);
141 puts(git_exec_path());
144 cmd_usage(0, NULL
, NULL
);
149 * We search for git commands in the following order:
151 * - the path of the "git" command if we could find it
153 * - the regular PATH.
156 prepend_to_path(exec_path
, strlen(exec_path
));
157 exec_path
= git_exec_path();
158 prepend_to_path(exec_path
, strlen(exec_path
));
160 /* See if it's an internal command */
161 handle_internal_command(argc
, argv
, envp
);
163 /* .. then try the external ones */
167 cmd_usage(0, exec_path
, "'%s' is not a git-command", cmd
);
169 fprintf(stderr
, "Failed to run command '%s': %s\n",
170 git_command
, strerror(errno
));