OptParseValidator

gem install opt_parse_validator

# test.rb

require 'opt_parse_validator'

begin
  # For constructor options, such as setting a banner, the summary width and indent,
  # see http://ruby-doc.org/stdlib-2.4.2/libdoc/optparse/rdoc/OptionParser.html#method-c-new
  parsed_cli_options = OptParseValidator::OptParser.new.add(
    OptParseValidator::OptString.new(['-m', '--mandatory PARAM', 'A Mandatory CLI option'], required: true),
    OptParseValidator::OptBoolean.new(['--test', '-t', 'Option Helper Message']),
    OptParseValidator::OptFilePath.new(['-o', '--output FILE', 'Output to FILE'], writable: true, exists: false),
    OptParseValidator::OptAlias.new(['--alias', '-a'], alias_for: '--test -o file.txt')
  ).results

  p parsed_cli_options
rescue OptParseValidator::Error => e
  puts 'Parsing Error: ' + e.message
end

Then have a play with ruby test.rb -h ruby test.rb -m hh -t ruby test.rb -t

It is worth to note that when aliases are used, it is recommended to provide them first in the CLI. Otherwise, they might override user-suplied cli options. For example, using the options above, ruby test.rb -m aa -o override.txt --alias won't have the desired effect (to have --output as override.txt), but ruby test.rb --alias -m aa -o override.txt will.

For more option examples, see

• https://github.com/wpscanteam/CMSScanner/blob/master/app/controllers/core/cli_options.rb
• https://github.com/wpscanteam/wpscan/blob/master/app/controllers/enumeration/cli_options.rb

Please feel free to send Pull Requests to improve this Readme

Some attributes are available for all Validators:

• :required (whether or not the associated cli option is required/mandatory - example).
• :required_unless (like the above, except if the option/s given in this parameter are called in the CLI - example, can be a single symbol or array of symbols)
• :default (Default value to use if the option is not supplied, the correct format has to be used as it won't go through the validation and normalization processes)
• :value_if_empty (Value to use if no argument has been supplied for the related option)
• :advanced (Whether or or not the option is an advanced one. If set to true, the option won't be displayed in the #simple_help, but will in the #full_help)

• Alias:
  • :alias_for (mandatory)
• Array
  • :separator (default: ',')
• Boolean
• Choice
  • :choices (mandatory)
  • :case_sensitive
• Credentials
• Directory Path
  • :create
  • :exists
  • :executable
  • :readable
  • :writable
• File Path
  • :create
  • :exists
  • :executable
  • :readable
  • :writable
• Headers
• Integer
• IntegerRange
  • separator (default: '-')
• MultiChoices
  • choices (mandatory)
  • separator (default: ',')
  • incompatible
• Positive Integer
• Path
  • :create
  • :file
  • :directory
  • :exists
  • :executable
  • :readable
  • :writable
• Proxy
  • :protocols
  • :default_protocol
• Regexp:
  • :options (See http://ruby-doc.org/core-2.2.1/Regexp.html#method-c-new)
• SmartList
  • separator (default: ',')
• String
• URI
  • :protocols
  • :default_protocol
• URL
  • :default_protocol