Required options raise exception if not provided

[DannyBen]

Hello,

I am not sure if this is a design choice or not.
It seems like in some cases, Clim handles exceptions on its own, and shows a friendly error to the user, and in other cases, it does not.

• "Option that requires an argument" - this prints a friendly error
• "Required options" - this raises an exception

Sample code

# src/bug1.cr
require "clim"

module Hello
  class Cli < Clim
    main do
      usage "hello <name>"
      option "--prefix <text>", type: String, desc: "Prefix.", required: true
      
      run do |opts, args|
        puts "ok"
      end
    end
  end
end

Hello::Cli.start(ARGV)

Actual behavior

$ crystal run src/bug1.cr -- --prefix
ERROR: Option that requires an argument. "--prefix"

Please see the `--help`.


$ crystal run src/bug1.cr -- --prefix a
ok


$ crystal run src/bug1.cr
Unhandled exception: Required options. "--prefix <text>" (Exception)
  from lib/clim/src/clim/command/parser.cr:31:11 in 'required_validate!'
  from lib/clim/src/clim/command.cr:79:7 in 'parse_by_parser'
  from lib/clim/src/clim/command.cr:72:14 in 'recursive_parse'
  from lib/clim/src/clim/command.cr:62:7 in 'parse'
  ... snip ...

Expected behavior

$ crystal run src/bug1.cr
ERROR: required option: "--prefix"

[at-grandpa]

@DannyBen
Thanks!!
Let me think about it.

[at-grandpa]

@DannyBen
released https://github.com/at-grandpa/clim/releases/tag/v0.11.2

The exception message has been fixed to read as follows.

$ crystal run src/bug1.cr
ERROR: Required options. "--prefix <text>"

Please see the `--help`.