Class: Erector::Erect

Inherits:
Object show all
Defined in:
lib/erector/erect.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Erect

Returns a new instance of Erect.



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# File 'lib/erector/erect.rb', line 8

def initialize(args)
  @verbose = true
  @mode = :to_erector
  @output_dir = nil
  
  opts = OptionParser.new do |opts|
    opts.banner = "Usage: erect [options] [file|dir]*"

    opts.separator "Converts from html/rhtml files to erector widgets, or from erector widgets to html files"
    opts.separator ""
    opts.separator "Options:"

    opts.on("-q", "--quiet",
            "Operate silently except in case of error") do |quiet|
      @verbose = !quiet
    end
    
    opts.on("--to-erector", "(default) Convert from html/rhtml to erector classes") do
      @mode = :to_erector
    end

    opts.on("--to-html", "Convert from erector to html") do
      @mode = :to_html
    end
    
    opts.on("-o", "--output-dir DIRECTORY", "Output files to DIRECTORY (default: output files go next to input files)") do |dir|
      @output_dir = dir
    end

    opts.on_tail("-h", "--help", "Show this message") do
      @mode = :help
      puts opts
      exit
    end

    opts.on_tail("-v", "--version", "Show version") do
      puts Erector::VERSION
      exit
    end
    
  end
  opts.parse!(args)
  @files = args
  explode_dirs
end

Instance Attribute Details

#files ⇒ Object (readonly)

Returns the value of attribute files.



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# File 'lib/erector/erect.rb', line 7

def files
  @files
end

#mode ⇒ Object (readonly)

Returns the value of attribute mode.



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# File 'lib/erector/erect.rb', line 7

def mode
  @mode
end

#output_dir ⇒ Object (readonly)

Returns the value of attribute output_dir.



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# File 'lib/erector/erect.rb', line 7

def output_dir
  @output_dir
end

#verbose ⇒ Object (readonly)

Returns the value of attribute verbose.



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# File 'lib/erector/erect.rb', line 7

def verbose
  @verbose
end

Instance Method Details

#camelize(lower_case_and_underscored_word, first_letter_in_uppercase = true) ⇒ Object

stolen from activesuppport/lib/inflector.rb



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# File 'lib/erector/erect.rb', line 132

def camelize(lower_case_and_underscored_word, first_letter_in_uppercase = true)
  if first_letter_in_uppercase
    lower_case_and_underscored_word.to_s.gsub(/\/(.?)/) { "::" + $1.upcase }.gsub(/(^|_)(.)/) { $2.upcase }
  else
    lower_case_and_underscored_word.first + camelize(lower_case_and_underscored_word)[1..-1]
  end
end

#constantize(camel_cased_word) ⇒ Object 



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# File 'lib/erector/erect.rb', line 139

def constantize(camel_cased_word)
  unless /\A(?:::)?([A-Z]\w*(?:::[A-Z]\w*)*)\z/ =~ camel_cased_word
    raise NameError, "#{camel_cased_word.inspect} is not a valid constant name!"
  end
  Object.module_eval("::#{$1}", __FILE__, __LINE__)
end

#explode(dir) ⇒ Object 



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# File 'lib/erector/erect.rb', line 71

def explode(dir)
  case mode
  when :to_erector
    FileList["#{dir}/**/*.rhtml", "#{dir}/**/*.html", "#{dir}/**/*.html.erb"]
  when :to_html
    FileList["#{dir}/**/*.rb"]
  end
end

#explode_dirs ⇒ Object

todo: unit test



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# File 'lib/erector/erect.rb', line 59

def explode_dirs
  exploded_files = FileList.new
  files.each do |file|
    if File.directory?(file)
      exploded_files.add(explode(file))
    else
      exploded_files.add(file)
    end
  end
  @files = exploded_files
end

#run ⇒ Object 



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# File 'lib/erector/erect.rb', line 80

def run
  self.send(mode)
end

#say(msg) ⇒ Object 



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# File 'lib/erector/erect.rb', line 54

def say(msg)
  print msg if verbose
end

#to_erector ⇒ Object 



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# File 'lib/erector/erect.rb', line 84

def to_erector
  files.each do |file|
    say "Erecting #{file}... "
    begin
      e = Erector::Erected.new(file)
      e.convert
      say " --> #{e.filename}\n"
    rescue => e
      puts e
      puts e.backtrace.join("\n\t")
      puts
    end
  end
end

#to_html ⇒ Object 



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# File 'lib/erector/erect.rb', line 99

def to_html
  files.each do |file|
    say "Erecting #{file}... "
    #todo: move this into Erected with better tests for the naming methods
    begin
      #todo: fail if file isn't a .rb file
      require file
      #todo: understand modulized widgets (e.g. class Foo::Bar::Baz < Erector::Widget in baz.rb)
      filename = file.split('/').last.gsub(/\.rb$/, '')
      widget_name = camelize(filename)
      widget_class = constantize(widget_name)
      
      if widget_class < Erector::Widget
        widget = widget_class.new
        #todo: skip if it's missing a no-arg constructor
        dir = output_dir || File.dirname(file)
        FileUtils.mkdir_p(dir)
        output_file = "#{dir}/#{filename}.html"
        File.open(output_file, "w") do |f|
          f.puts widget.to_s
        end
        say " --> #{output_file}\n"
      else
        say " -- not a widget, skipping\n"
      end
    rescue => e
      puts e
      puts e.backtrace.join("\n\t")
    end
  end
end