Class: Rum::Docker::Options

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
Enumerable
Defined in:
lib/rumrunner/docker.rb

Overview

Collection of Docker command options to be applied on execution.

Instance Method Summary collapse

Constructor Details

#initialize(options = {}, &block) ⇒ Options

Initialize a new OPTIONS collection for Docker executable. Evaluates the &block if given.



113
114
115
116
 
# File 'lib/rumrunner/docker.rb', line 113

def initialize(options = {}, &block)
  @data = Hash.new{|hash, key| hash[key] = [] }.update(options)
  instance_eval(&block) if block_given?
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(m, *args, &block) ⇒ Object

Missing methods are interpreted as options to be added to the underlying collection.

Example:

opts = Options.new
opts.fizz "buzz"
# => @data={:fizz=>["buzz"]}



127
128
129
130
 
# File 'lib/rumrunner/docker.rb', line 127

def method_missing(m, *args, &block)
  @data[m] += args unless args.empty?
  self
end

Instance Method Details

#each ⇒ Object

Yield each option as a CLI flag/option, with - or -- prefix.

Example:

opts = Options.new
opts.fizz "buzz"
opts.to_a
# => ["--fizz", "buzz"]



141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
 
# File 'lib/rumrunner/docker.rb', line 141

def each
  @data.each do |name, values|
    option = flagify name
    values.each do |value|
      if value.is_a?(Hash)
        value.map{|kv| kv.join("=") }.each do |val|
          yield option
          yield val
        end
      elsif [true, false].include? value
        yield "#{option}=#{value}"
      else
        yield option
        yield value.to_s
      end
    end
  end
end

#to_s ⇒ Object

Convert options to string.

Example:

opts = Options.new
opts.fizz "buzz"
opts.to_s
# => "--fizz buzz"



169
170
171
 
# File 'lib/rumrunner/docker.rb', line 169

def to_s
  to_a.join(" ")
end