Class: Erubis::Main

Inherits:
Object
  • Object
show all
Defined in:
lib/erubis/main.rb

Overview

main class of command

ex.

Main.main(ARGV)

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Main

Returns a new instance of Main.



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# File 'lib/erubis/main.rb', line 51

def initialize
  @single_options = "hvxztTSbeBXNUC"
  @arg_options    = "pcrfKIlaE" #C
  @option_names   = {
    'h' => :help,
    'v' => :version,
    'x' => :source,
    'z' => :syntax,
    'T' => :unexpand,
    't' => :untabify,      # obsolete
    'S' => :intern,
    'b' => :bodyonly,
    'B' => :binding,
    'p' => :pattern,
    'c' => :context,
    #'C' => :class,
    'e' => :escape,
    'r' => :requires,
    'f' => :datafiles,
    'K' => :kanji,
    'I' => :includes,
    'l' => :lang,
    'a' => :action,
    'E' => :enhancers,
    'X' => :notext,
    'N' => :linenum,
    'U' => :unique,
    'C' => :compact,
  }
  assert unless @single_options.length + @arg_options.length == @option_names.length
  (@single_options + @arg_options).each_byte do |ch|
    assert unless @option_names.key?(ch.chr)
  end
end

Class Method Details

.main(argv = ARGV) ⇒ Object 



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# File 'lib/erubis/main.rb', line 40

def self.main(argv=ARGV)
  status = 0
  begin
    Main.new.execute(ARGV)
  rescue CommandOptionError => ex
    $stderr.puts ex.message
    status = 1
  end
  exit(status)
end

Instance Method Details

#execute(argv = ARGV) ⇒ Object 



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# File 'lib/erubis/main.rb', line 87

def execute(argv=ARGV)
  ## parse command-line options
  options, properties = parse_argv(argv, @single_options, @arg_options)
  filenames = argv
  options['h'] = true if properties[:help]
  opts = Object.new
  arr = @option_names.collect {|ch, name| "def #{name}; @#{name}; end\n" }
  opts.instance_eval arr.join
  options.each do |ch, val|
    name = @option_names[ch]
    opts.instance_variable_set("@#{name}", val)
  end

  ## help, version, enhancer list
  if opts.help || opts.version
    puts version()         if opts.version
    puts usage()           if opts.help
    puts show_properties() if opts.help
    puts show_enhancers()  if opts.help
    return
  end

  ## include path
  opts.includes.split(/,/).each do |path|
    $: << path
  end if opts.includes

  ## require library
  opts.requires.split(/,/).each do |library|
    require library
  end if opts.requires

  ## action
  action = opts.action
  action ||= 'syntax'  if opts.syntax
  action ||= 'convert' if opts.source || opts.notext

  ## lang
  lang = opts.lang || 'ruby'
  action ||= 'convert' if opts.lang

  ## class name of Eruby
  #classname = opts.class
  classname = nil
  klass = get_classobj(classname, lang, properties[:pi])

  ## kanji code
  $KCODE = opts.kanji if opts.kanji

  ## read context values from yaml file
  datafiles = opts.datafiles
  context = load_datafiles(datafiles, opts)

  ## parse context data
  if opts.context
    context = parse_context_data(opts.context, opts)
  end

  ## properties for engine
  properties[:escape]   = true         if opts.escape && !properties.key?(:escape)
  properties[:pattern]  = opts.pattern if opts.pattern
  #properties[:trim]     = false        if opts.notrim
  properties[:preamble] = properties[:postamble] = false if opts.bodyonly
  properties[:pi]       = nil          if properties[:pi] == true

  ## create engine and extend enhancers
  engine = klass.new(nil, properties)
  enhancers = get_enhancers(opts.enhancers)
  #enhancers.push(Erubis::EscapeEnhancer) if opts.escape
  enhancers.each do |enhancer|
    engine.extend(enhancer)
    engine.bipattern = properties[:bipattern] if enhancer == Erubis::BiPatternEnhancer
  end

  ## no-text
  engine.extend(Erubis::NoTextEnhancer) if opts.notext

  ## convert and execute
  val = nil
  msg = "Syntax OK\n"
  if filenames && !filenames.empty?
    filenames.each do |filename|
      File.file?(filename)  or
        raise CommandOptionError.new("#{filename}: file not found.")
      engine.filename = filename
      engine.convert!(File.read(filename))
      val = do_action(action, engine, context, filename, opts)
      msg = nil if val
    end
  else
    engine.filename = filename = '(stdin)'
    engine.convert!($stdin.read())
    val = do_action(action, engine, context, filename, opts)
    msg = nil if val
  end
  print msg if action == 'syntax' && msg

end