Support `--` (end of options) to `mruby` command
#### Before this patch:
```
$ bin/mruby -e 'p ARGV' -- -x
bin/mruby: invalid option -- (-h will show valid options)
```
#### After this patch:
```
$ bin/mruby -e 'p ARGV' -- -x
["-x"]
```
MODIFY
mrbgems/mruby-bin-mruby/bintest/mruby.rb
mrbgems/mruby-bin-mruby/bintest/mruby.rb
@@ -128,6 +128,10 @@ assert('mruby -r option (file not found)') do
assert_mruby("", /\A.*: Cannot open library file: .*\n\z/, false, %w[-r _no_exists_])
end
+assert('mruby --') do
+ assert_mruby(%{["-x", "1"]\n}, "", true, %w[-e p(ARGV) -- -x 1])
+end
+
assert('mruby invalid short option') do
assert_mruby("", /\A.*: invalid option -1 .*\n\z/, false, %w[-1])
end

MODIFY
mrbgems/mruby-bin-mruby/tools/mruby/mruby.c
mrbgems/mruby-bin-mruby/tools/mruby/mruby.c
@@ -64,21 +64,33 @@ options_init(struct options *opts, int argc, char **argv)
static const char *
options_opt(struct options *opts)
{
+ /* concatenated short options (e.g. `-cv`) */
if (*opts->short_opt && *++opts->opt) {
short_opt:
opts->short_opt[0] = *opts->opt;
opts->short_opt[1] = 0;
return opts->short_opt;
}
+
while (++opts->argv, --opts->argc) {
opts->opt = *opts->argv;
+
+ /* empty || not start with `-` || `-` */
if (!opts->opt[0] || opts->opt[0] != '-' || !opts->opt[1]) return NULL;
+
if (opts->opt[1] == '-') {
+ /* `--` */
+ if (!opts->opt[2]) {
+ ++opts->argv, --opts->argc;
+ return NULL;
+ }
+ /* long option */
opts->opt += 2;
*opts->short_opt = 0;
return opts->opt;
}
else {
+ /* short option */
++opts->opt;
goto short_opt;
}
@@ -90,6 +102,7 @@ static const char *
options_arg(struct options *opts)
{
if (*opts->short_opt && opts->opt[1]) {
+ /* concatenated short option and option argument (e.g. `-rLIBRARY`) */
*opts->short_opt = 0;
return opts->opt + 1;
}

Support `--` (end of options) to `mruby` command

#### Before this patch:

  ```
  $ bin/mruby -e 'p ARGV' -- -x
  bin/mruby: invalid option -- (-h will show valid options)
  ```

#### After this patch:

  ```
  $ bin/mruby -e 'p ARGV' -- -x
  ["-x"]
  ```