Class: ShellOpts::Analyzer

Inherits:
Object
  • Object
show all
Includes:
Grammar
Defined in:
lib/shellopts/analyzer.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(grammar) ⇒ Analyzer

Returns a new instance of Analyzer.



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# File 'lib/shellopts/analyzer.rb', line 72

def initialize(grammar)
  @grammar = grammar
end

Instance Attribute Details

#grammar ⇒ Object (readonly)

Returns the value of attribute grammar.



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# File 'lib/shellopts/analyzer.rb', line 70

def grammar
  @grammar
end

Class Method Details

.analyze(source) ⇒ Object 



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# File 'lib/shellopts/analyzer.rb', line 127

def Analyzer.analyze(source) self.new(source).analyze end

Instance Method Details

#analyze ⇒ Object 



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# File 'lib/shellopts/analyzer.rb', line 106

def analyze()
  move_commands

  @grammar.traverse(Grammar::Command) { |command|
    command.set_supercommand
    command.reorder_options
    command.collect_options
    command.compute_option_hashes
  }

  @grammar.compute_command_hashes

  @grammar.traverse { |node| 
    node.remove_brief_nodes 
    node.remove_arg_descr_nodes
    node.remove_arg_spec_nodes
  }

  @grammar
end

#move_commands ⇒ Object

Move commands that are nested within a different command than it belongs to



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# File 'lib/shellopts/analyzer.rb', line 77

def move_commands
  # We can't use Command#[] at this point so we collect the commands here
  h = {}
  @grammar.traverse(Grammar::Command) { |command|
    h[command.path] = command
  }

  # Find commands to move
  #
  # Commands are moved in two steps because the behaviour of #traverse is
  # not defined when the data structure changes beneath it
  move = []
  @grammar.traverse(Grammar::Command) { |command|
    if command.path.size > 1 && command.parent && command.parent.path != command.path[0..-2]
      move << command
    else
      command.instance_variable_set(:@command, command.parent)
    end
  }

  # Move commands but do not change parent/child relationship
  move.each { |command|
    supercommand = h[command.path[0..-2]] or analyzer_error "Can't find #{command.ident}!"
    command.parent.commands.delete(command)
    supercommand.commands << command
    command.instance_variable_set(:@command, supercommand)
  }
end