upload-pack: optionally allow fetching reachable sha1

diff --git a/parse-options.c b/parse-options.c
index e7dafa80d55adb9b863c23f711389e5eaa6b2c5e..80106c06bcc68782baad6afa5954b829ab17ba8d 100644 (file)
--- a/parse-options.c
+++ b/parse-options.c
@@ -14,8 +14,12 @@ static int parse_options_usage(struct parse_opt_ctx_t *ctx,
 
 int optbug(const struct option *opt, const char *reason)
 {
-       if (opt->long_name)
+       if (opt->long_name) {
+               if (opt->short_name)
+                       return error("BUG: switch '%c' (--%s) %s",
+                                    opt->short_name, opt->long_name, reason);
                return error("BUG: option '%s' %s", opt->long_name, reason);
+       }
        return error("BUG: switch '%c' %s", opt->short_name, reason);
 }
 
@@ -347,12 +351,20 @@ static void check_typos(const char *arg, const struct option *options)
 static void parse_options_check(const struct option *opts)
 {
        int err = 0;
+       char short_opts[128];
 
+       memset(short_opts, '\0', sizeof(short_opts));
        for (; opts->type != OPTION_END; opts++) {
                if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
                    (opts->flags & PARSE_OPT_OPTARG))
                        err |= optbug(opts, "uses incompatible flags "
                                        "LASTARG_DEFAULT and OPTARG");
+               if (opts->short_name) {
+                       if (0x7F <= opts->short_name)
+                               err |= optbug(opts, "invalid short name");
+                       else if (short_opts[opts->short_name]++)
+                               err |= optbug(opts, "short name already used");
+               }
                if (opts->flags & PARSE_OPT_NODASH &&
                    ((opts->flags & PARSE_OPT_OPTARG) ||
                     !(opts->flags & PARSE_OPT_NOARG) ||