Issue #22244 has been updated by zenspider (Ryan Davis). Quick and dirty patch: https://github.com/ruby/ruby/compare/master...zenspider:ruby:zenspider__enco... This is rough. I'm faking an eval early in the option handling. There is probably a better C way to do this. It is probably failing tests. But the idea is there. ---------------------------------------- Feature #22244: `ruby -UU` should set both internal and external, `ruby -E` should print encoding list https://bugs.ruby-lang.org/issues/22244#change-118522 * Author: zenspider (Ryan Davis) * Status: Open ---------------------------------------- ``` 10004 $ env -u LANG ruby -U -e 'pp [Encoding.default_internal, Encoding.default_external]' [#<Encoding:UTF-8>, #<Encoding:US-ASCII>] 10005 $ env -u LANG ruby -EUTF-8 -e 'pp [...]' [nil, #<Encoding:UTF-8>] 10006 $ env -u LANG ruby -EUTF-8 -U -e 'pp [...]' [#<Encoding:UTF-8>, #<Encoding:UTF-8>] 10007 $ env -u LANG ruby -EUTF-8:UTF-8 -e 'pp [...]' [#<Encoding:UTF-8>, #<Encoding:UTF-8>] 10008 $ env -u LANG ruby -UU -e 'pp [...]' [#<Encoding:UTF-8>, #<Encoding:US-ASCII>] ``` I think the option processing of encodings is VERY poorly documented and frustrating to try to use. 1. --help doesn't list -U. (The man page does) 2. --help for -E doesn't provide a means to get a list of available encoding names (same with manpage), leading me to try U, UTF8, UTF_8, before finding UTF-8. `ruby -E` could just print them all out. 3. WHY NOT take UTF8 or UTF_8 (since that's the class name)? 4. Please consider `-UU` to mean `-EUTF-8:UTF-8` -- https://bugs.ruby-lang.org/