Class: Migr8::Util::CommandOptionDefinition

Inherits:
Object
  • Object
show all
Defined in:
lib/migr8.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(defstr) ⇒ CommandOptionDefinition

Returns a new instance of CommandOptionDefinition.



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# File 'lib/migr8.rb', line 1966

def initialize(defstr)
  case defstr
  when /\A *--(\w[-\w]*)(?:\[=(.+?)\]|=(\S.*?))?(?:\s+\#(\w+))?\s*:(?:\s+(.*)?)?\z/
    short, long, arg, name, desc = nil, $1, ($2 || $3), $4, $5
    arg_required = $2 ? nil : $3 ? true : false
  when /\A *-(\w),\s*--(\w[-\w]*)(?:\[=(.+?)\]|=(\S.*?))?(?:\s+\#(\w+))?\s*:(?:\s+(.*)?)?\z/
    short, long, arg, name, desc = $1, $2, ($3 || $4), $5, $6
    arg_required = $3 ? nil : $4 ? true : false
  when /\A *-(\w)(?:\[(.+?)\]|\s+([^\#\s].*?))?(?:\s+\#(\w+))?\s*:(?:\s+(.*)?)?\z/
    short, long, arg, name, desc = $1, nil, ($2 || $3), $4, $5
    arg_required = $2 ? nil : $3 ? true : false
  else
    raise CommandOptionDefinitionError.new("'#{defstr}': invalid definition.")
  end
  name ||= (long || short)
  #
  @short = _strip(short)
  @long  = _strip(long)
  @arg   = _strip(arg)
  @name  = _strip(name)
  @desc  = _strip(desc)
  @arg_required = arg_required
end

Instance Attribute Details

#arg ⇒ Object

Returns the value of attribute arg.



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# File 'lib/migr8.rb', line 1964

def arg
  @arg
end

#arg_required ⇒ Object

Returns the value of attribute arg_required.



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# File 'lib/migr8.rb', line 1964

def arg_required
  @arg_required
end

#desc ⇒ Object

Returns the value of attribute desc.



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# File 'lib/migr8.rb', line 1964

def desc
  @desc
end

#long ⇒ Object

Returns the value of attribute long.



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# File 'lib/migr8.rb', line 1964

def long
  @long
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/migr8.rb', line 1964

def name
  @name
end

#short ⇒ Object

Returns the value of attribute short.



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# File 'lib/migr8.rb', line 1964

def short
  @short
end

Instance Method Details

#usage(width = 20) ⇒ Object 



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# File 'lib/migr8.rb', line 1990

def usage(width=20)
  argreq = @arg_required
  if @short && @long
    s = "-#{@short}, --#{@long}"           if argreq == false
    s = "-#{@short}, --#{@long}=#{@arg}"   if argreq == true
    s = "-#{@short}, --#{@long}[=#{@arg}]" if argreq == nil
  elsif @long
    s = "--#{@long}"           if argreq == false
    s = "--#{@long}=#{@arg}"   if argreq == true
    s = "--#{@long}[=#{@arg}]" if argreq == nil
  elsif @short
    s = "-#{@short}"           if argreq == false
    s = "-#{@short} #{@arg}"   if argreq == true
    s = "-#{@short}[#{@arg}]"  if argreq == nil
  end
  #; [!xd9do] returns option usage with specified width.
  return "%-#{width}s: %s" % [s, @desc]
end