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Contents
module R10K
module Util
# Allow for easy setting of instance options based on a hash
#
# This emulates the behavior of Ruby 2.0 named arguments, but since r10k
# supports Ruby 1.8.7+ we cannot use that functionality.
module Setopts
private
# @param opts [Hash]
# @param allowed [Hash<Symbol, Symbol>]
#
# @example
# opts = {:one => "one value"}
# allowed => {:one => :self}
# setopts(opts, allowed)
# @one # => "one value"
#
# @example
# opts = {:uno => "one value"}
# allowed => {:one => :one, :uno => :one}
# setopts(opts, allowed)
# @one # => "one value"
#
# @example
#
# opts = {:trace => "something"}
# allowed = {:trace => nil}
# setopts(opts, allowed)
# @trace # => nil
#
def setopts(opts, allowed)
opts.each_pair do |key, value|
if allowed.key?(key)
rhs = allowed[key]
case rhs
when NilClass, FalseClass
# Ignore nil options
when :self, TrueClass
instance_variable_set("@#{key}".to_sym, value)
else
instance_variable_set("@#{rhs}".to_sym, value)
end
else
raise ArgumentError, "#{self.class.name} cannot handle option '#{key}'"
end
end
end
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems