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 { "format-patch", cmd_format_patch },
51 { "count-objects", cmd_count_objects },
56 { "rev-list", cmd_rev_list },
57 { "init-db", cmd_init_db },
58 { "tar-tree", cmd_tar_tree },
59 { "upload-tar", cmd_upload_tar },
60 { "check-ref-format", cmd_check_ref_format },
61 { "ls-files", cmd_ls_files },
62 { "ls-tree", cmd_ls_tree },
63 { "tar-tree", cmd_tar_tree },
64 { "read-tree", cmd_read_tree },
65 { "commit-tree", cmd_commit_tree },
66 { "apply", cmd_apply },
67 { "show-branch", cmd_show_branch },
68 { "diff-files", cmd_diff_files },
69 { "diff-index", cmd_diff_index },
70 { "diff-stages", cmd_diff_stages },
71 { "diff-tree", cmd_diff_tree }
75 /* Turn "git cmd --help" into "git help cmd" */
76 if (argc > 1 && !strcmp(argv[1], "--help")) {
78 argv[0] = cmd = "help";
81 for (i = 0; i < ARRAY_SIZE(commands); i++) {
82 struct cmd_struct *p = commands+i;
83 if (strcmp(p->cmd, cmd))
85 exit(p->fn(argc, argv, envp));
89 int main(int argc, const char **argv, char **envp)
91 const char *cmd = argv[0];
92 char *slash = strrchr(cmd, '/');
93 char git_command[PATH_MAX + 1];
94 const char *exec_path = NULL;
97 * Take the basename of argv[0] as the command
98 * name, and the dirname as the default exec_path
99 * if it's an absolute path and we don't have
110 * "git-xxxx" is the same as "git xxxx", but we obviously:
112 * - cannot take flags in between the "git" and the "xxxx".
113 * - cannot execute it externally (since it would just do
114 * the same thing over again)
116 * So we just directly call the internal command handler, and
117 * die if that one cannot handle it.
119 if (!strncmp(cmd, "git-", 4)) {
122 handle_internal_command(argc, argv, envp);
123 die("cannot handle %s internally", cmd);
126 /* Default command: "help" */
129 /* Look for flags.. */
134 if (strncmp(cmd, "--", 2))
140 * For legacy reasons, the "version" and "help"
141 * commands can be written with "--" prepended
142 * to make them look like flags.
144 if (!strcmp(cmd, "help"))
146 if (!strcmp(cmd, "version"))
150 * Check remaining flags (which by now must be
151 * "--exec-path", but maybe we will accept
152 * other arguments some day)
154 if (!strncmp(cmd, "exec-path", 9)) {
157 git_set_exec_path(cmd + 1);
160 puts(git_exec_path());
163 cmd_usage(0, NULL, NULL);
168 * We search for git commands in the following order:
170 * - the path of the "git" command if we could find it
172 * - the regular PATH.
175 prepend_to_path(exec_path, strlen(exec_path));
176 exec_path = git_exec_path();
177 prepend_to_path(exec_path, strlen(exec_path));
179 /* See if it's an internal command */
180 handle_internal_command(argc, argv, envp);
182 /* .. then try the external ones */
186 cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
188 fprintf(stderr, "Failed to run command '%s': %s\n",
189 git_command, strerror(errno));