Module: Semi::Variable

Defined in:
lib/semi/variable.rb

Constant Summary collapse

@@var_types =

Variable types are ordered from most to least specific

{ 'url'       =>   Semi::Variables::Url,
'path'      =>   Semi::Variables::Path,
'boolean'   =>   Semi::Variables::Boolean,
'integer'   =>   Semi::Variables::Integer,
'string'    =>   Semi::Variables::String, }

Class Method Summary collapse

Class Method Details

.expand(val, dict) ⇒ Object 



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# File 'lib/semi/variable.rb', line 54

def self.expand(val, dict)
  unless ['Semi::Variables::String', 'String'].include? val.class.to_s
    return val
  end

  check = true
  while check
    # Look for simple variable expansion
    if match = /\$\{?(\w+)\}?/.match(val)
      val = match.pre_match + dict[match[1].downcase] + match.post_match
    elsif match = /\$\((.*)\)/.match(val)
      val = match.pre_match + `#{match[1]} 2>/dev/null` + match.post_match
    else
      # no more matches... we must be done...
      check = false
    end
  end

  return val
end

.import(val, hints = nil) ⇒ Object 



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# File 'lib/semi/variable.rb', line 22

def self.import(val, hints=nil)
  # If hints have been supplied, try to create from them
  unless hints.nil?
    hints = [hints].flatten.select {|h| @@var_types.include? h }
    if hints.count > 0
      return @@var_types[hints[0]].new(val)
    end
  end

  # look for the obsure patterns before returning a string var
  case
  when Semi::Variables::Url::validate(val)
    return Semi::Variables::Url.new(val)
  when Semi::Variables::Path.validate(val)
    return Semi::Variables::Path.new(val)
  when Semi::Variables::Boolean.validate(val)
    return Semi::Variables::Boolean.new(val)
  when Semi::Variables::Integer.validate(val)
    return Semi::Variables::Integer.new(val)
  when val.class == 1.class   # Fixnum vs Integer
    return Semi::Variables::Integer.new(val)
  when val.class == TrueClass
    return Semi::Variables::Boolean.new(val)
  when val.class == FalseClass
    return Semi::Variables::Boolean.new(val)
  else
    return Semi::Variables::String.new(val)
  end

end