Class: Pfu::Parser

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

Class Method Summary collapse

Class Method Details

.parse(path) ⇒ Object 



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# File 'lib/pfu/parser.rb', line 38

def self.parse(path)
  return unless File.extname(path) == '.rb'
  source = File.read(path)
  lines  = source.split("\n")

  begin
    funcname, opts, lineno = eval(source)
    
    raise 'Invalid function definition' unless (funcname and opts and lineno)
  rescue => e
    $logger.error "The function in #{path} doesn't load properly!"
    $logger.error e.message
    return nil
  end

  stripcount = case source
  when /module\s+Puppet::Parser::Functions/
    2
  when /Puppet::Parser::Functions(.|::)newfunction/
    1
  end

  block = lines[(lineno-1)..-1].join("\n")
  block.gsub!(/\A.*\|\*?\w+\|/, '')                            # remove block arg string ("|args|")
  block.gsub!(/((end|})\s*){#{stripcount}}(^#.*|\s*)*\z/, '')  # remove closing block keywords and trailing comments

  heredoc = source.match(/<<-['"]?(\w+)['"]?/)
  if heredoc
    block.gsub!(/\A.*#{heredoc[1]}/m, '')
  end

  header = lines[0...(lines.index { |l| l =~ /Puppet::Parser::Functions/ })].join("\n")
  args   = lines[lineno-1].match(/\|\s*\*?(\w+)\s*\|/)[1]

  opts[:doc]            = opts[:doc].gsub("\n", "\n#") unless opts[:doc].nil?
  opts[:name]           = funcname.to_sym
  opts[:header]         = header
  opts[:args]           = args
  opts[:implementation] = block

  opts
end