Class: Ant::ProjectConverter

Inherits:
Object
  • Object
show all
Includes:
REXML::SAX2Listener
Defined in:
lib/rake/ant/project_converter.rb

Constant Summary collapse

ID = 
/\A[a-zA-Z_][a-zA-Z0-9_]*\z/

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ProjectConverter

Returns a new instance of ProjectConverter.



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# File 'lib/rake/ant/project_converter.rb', line 9

def initialize
  @output = $stdout
  @depth = 0
  @seen = ['<DOC>', 0]
end

Class Method Details

.convert(file = "build.xml") ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 93

def self.convert(file = "build.xml")
  source = File.exists?(file) ? File.new(file) : $stdin
  parser = REXML::Parsers::SAX2Parser.new source
  parser.listen self.new
  parser.parse
end

Instance Method Details

#characters(text) ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 34

def characters(text)
  @output.print value_inspect(text.strip) if text.strip.length > 0
end

#emit(code, attributes = nil) ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 53

def emit(code, attributes = nil)
  print_with_indent safe_method_name(code, attributes)
  if attributes
    first = true
    attributes.each do |k,v|
      @output.print "," unless first
      @output.print " #{symbol_or_string(k)} => #{value_inspect(v)}"
      first = false
    end
  end
end

#emit_do(tag) ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 38

def emit_do(tag)
  @output.puts " do" if @seen.last[1] != @depth
  @seen << [tag, @depth]
end

#emit_end(tag) ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 43

def emit_end(tag)
  level = @seen.last
  if level[0] == tag && level[1] == @depth
    @output.puts
  else
    print_with_indent "end\n"
    @seen << ["/#{tag}", @depth]
  end
end

#end_element(uri, localname, qname) ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 29

def end_element(uri, localname, qname)
  @depth -= 1
  emit_end(localname)
end

#print_with_indent(str) ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 65

def print_with_indent(str)
  @output.print "  " * @depth
  @output.print str
end

#safe_method_name(s, attributes) ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 84

def safe_method_name(s, attributes)
  s = Ant.safe_method_name(s)
  if s =~ ID
    s
  else
    "_element #{s.inspect}#{attributes.nil? || attributes.empty? ? '' : ','}"
  end
end

#start_element(uri, localname, qname, attributes) ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 15

def start_element(uri, localname, qname, attributes)
  emit_do(localname)
  case localname
  when "project"
    @output.puts "require 'ant'"
    emit "ant", attributes
  when "description"
    print_with_indent "project.description = "
  else
    emit localname, attributes
  end
  @depth += 1
end

#symbol_or_string(s) ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 72

def symbol_or_string(s)
  if s =~ ID
    ":#{s}"
  else
    s.inspect
  end
end

#value_inspect(s) ⇒ Object 



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# File 'lib/rake/ant/project_converter.rb', line 80

def value_inspect(s)
  s.inspect.gsub("\\n", "\n")
end