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module Dry
# Argument parser
#
# Passing and array or arguments, it will decide which one are arguments
# and which one are options.
#
# We have a limitation if setting the value without options, as a hash
# having the same key as one of the valid options, will parse the value
# as options. In this case, all unknown options will be reject with an exception.
#
# @example
# p = Dry::Configurable::ArgumentParser.new.('db:sqlite', reader: true)
#
# p[0] # => 'db:sqlite'
# p[1] # => ArgumentParser::DEFAULT_PROCESSOR
# p[2] # => { reader: true }
module Configurable
class Settings
# @private
class ArgumentParser
DEFAULT_PROCESSOR = ->(v) { v }
# @private
def call(val, opts, block)
if block && block.parameters.empty?
raise ArgumentError unless Undefined.equal?(opts)
processor = DEFAULT_PROCESSOR
value, options = Settings.capture(&block), val
else
processor = block || DEFAULT_PROCESSOR
if Undefined.equal?(opts) && val.is_a?(Hash) && val.key?(:reader)
value, options = Undefined, val
else
value, options = val, opts
end
end
[value, processor, options(**Undefined.default(options, EMPTY_HASH))]
end
def options(reader: false)
{ reader: reader }
end
end
end
end
end
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