magit: ruby.txt

modified   ruby.c
@@ -1708,9 +1708,12 @@ proc_options(long argc, char **argv, ruby_cmdline_options_t *opt, int envopt)
 
           case 'E':
             if (!*++s && (!--argc || !(s = *++argv))) {
-                rb_raise(rb_eRuntimeError, "missing argument for -E");
-            }
-            proc_encoding_option(opt, s, "-E");
+                printf("Available Encodings:\n\n");
+                // cheat! I can't call rb_eval_string at this point of init
+                opt->e_script = rb_str_new2("puts Encoding.constants.map { |k| Encoding.const_get(k) }.grep(Encoding).map(&:name).uniq.grep_v(/stateless|-SoftBank/).sort_by(&:downcase).join(', '); exit(1)");
+                opt->script = "-e";
+            } else
+                proc_encoding_option(opt, s, "-E");
             break;
 
           case 'U':