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 },
63 { "diff-files", cmd_diff_files },
64 { "diff-index", cmd_diff_index },
65 { "diff-stages", cmd_diff_stages },
66 { "diff-tree", cmd_diff_tree }
70 /* Turn "git cmd --help" into "git help cmd" */
71 if (argc > 1 && !strcmp(argv[1], "--help")) {
73 argv[0] = cmd = "help";
76 for (i = 0; i < ARRAY_SIZE(commands); i++) {
77 struct cmd_struct *p = commands+i;
78 if (strcmp(p->cmd, cmd))
80 exit(p->fn(argc, argv, envp));
84 int main(int argc, const char **argv, char **envp)
86 const char *cmd = argv[0];
87 char *slash = strrchr(cmd, '/');
88 char git_command[PATH_MAX + 1];
89 const char *exec_path = NULL;
92 * Take the basename of argv[0] as the command
93 * name, and the dirname as the default exec_path
94 * if it's an absolute path and we don't have
105 * "git-xxxx" is the same as "git xxxx", but we obviously:
107 * - cannot take flags in between the "git" and the "xxxx".
108 * - cannot execute it externally (since it would just do
109 * the same thing over again)
111 * So we just directly call the internal command handler, and
112 * die if that one cannot handle it.
114 if (!strncmp(cmd, "git-", 4)) {
117 handle_internal_command(argc, argv, envp);
118 die("cannot handle %s internally", cmd);
121 /* Default command: "help" */
124 /* Look for flags.. */
129 if (strncmp(cmd, "--", 2))
135 * For legacy reasons, the "version" and "help"
136 * commands can be written with "--" prepended
137 * to make them look like flags.
139 if (!strcmp(cmd, "help"))
141 if (!strcmp(cmd, "version"))
145 * Check remaining flags (which by now must be
146 * "--exec-path", but maybe we will accept
147 * other arguments some day)
149 if (!strncmp(cmd, "exec-path", 9)) {
152 git_set_exec_path(cmd + 1);
155 puts(git_exec_path());
158 cmd_usage(0, NULL, NULL);
163 * We search for git commands in the following order:
165 * - the path of the "git" command if we could find it
167 * - the regular PATH.
170 prepend_to_path(exec_path, strlen(exec_path));
171 exec_path = git_exec_path();
172 prepend_to_path(exec_path, strlen(exec_path));
174 /* See if it's an internal command */
175 handle_internal_command(argc, argv, envp);
177 /* .. then try the external ones */
181 cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
183 fprintf(stderr, "Failed to run command '%s': %s\n",
184 git_command, strerror(errno));