Suggestions for features to define

[karfau]

I'm collectiong rough ideas here of features to describe once I finished the current parsers (or maybe some from #2). They would then be added to each pkg/features.json in one go.

• parsing of arguments
• stop at first positional
  • top prio since this is what started the research see Stop parsing options after passing runnable in list of arguments runex#7
  • also talk about -- which is a common convention in unix
  • the topic "interspersed arguments", the possibility to mix options and positional arguments, seems to be related.
• slicing of argv (mandatory vs default vs configurable ...)
• help/usage output
  • generated from configuration?
  • quite some options out there
  • automatic/reserverd flag(s)
• checking keys from process.env (e.g. based on prefix, or configured per option)
• checking config file(s) for options
• Paradigms: Singelton/global state; functional; Class instance;...?
• options.syntax:-o=value
• options.syntax:grouping of single letter aliases
• options.syntax.default-value: default value for options not passed (has been specified for dashdash, because I confused it with options.types.default-string)

Later (or might not happen if I don't need it, but open for PRs although would prefer other features first.)

• compatible option formats (I think I have seen similarities/compatibility goals between some libs)
• support for (sub)command(s)
  • seems to be quite a big scope and the differences might be huge
  • I don't need it for runex currently