Class: Brash::Command

Inherits:
Object
  • Object
show all
Defined in:
lib/brash.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(command, *args) ⇒ Command

Returns a new instance of Command.



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# File 'lib/brash.rb', line 28

def initialize(command, *args)
  @command = command
  @args = Array(args).join("")
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

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



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# File 'lib/brash.rb', line 25

def method_missing(method, *args, &block)
  @compound_command = Command.new(method, *args, &block).tap{|c| c.context = context}
end

Instance Attribute Details

#context ⇒ Object

Returns the value of attribute context.



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# File 'lib/brash.rb', line 24

def context
  @context
end

Instance Method Details

#arg(arg) ⇒ Object 



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# File 'lib/brash.rb', line 41

def arg(arg)
  @args += " " + escape_arg(arg)
  self
end

#dash(*args) ⇒ Object 



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# File 'lib/brash.rb', line 36

def dash(*args)
  @args += "-#{args.first}" if args.length > 0
  @args += " " + args[1..-1].map{|arg| escape_arg(arg)}.join(" ") if args.length > 1
  self
end

#escape(bash, depth = context.depth) ⇒ Object 



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# File 'lib/brash.rb', line 53

def escape(bash, depth=context.depth)
  escaped = bash
  escaped = "\\"*(depth-1) + "\"" + "#{escaped}" + "\\"*(depth-1) + "\"" if depth > 0
  escaped 
end

#escape_arg(arg) ⇒ Object 



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# File 'lib/brash.rb', line 45

def escape_arg(arg)
  if arg.is_a?(Proc)
    CommandContext.surround(context.depth + 1, &arg).command.to_bash
  elsif arg.is_a?(String) && arg.include?(" ")
    escape(arg, context.depth+1)
  else arg
  end
end

#pipe_to(&block) ⇒ Object 



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# File 'lib/brash.rb', line 32

def pipe_to(&block)
  command = Brash.build(&block)
  @args += " | " + command.to_bash
end

#to_bash ⇒ Object 



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# File 'lib/brash.rb', line 58

def to_bash
  bash = @command.to_s
  bash += " " + @args unless @args == ""
  bash += " " + @compound_command.to_bash if @compound_command
  escape(bash)
end