Module: RERB::CLI

Defined in:
lib/rerb/cli.rb

Overview

Command Line Interface for invoking RERB

Class Method Summary collapse

Class Method Details

.parse(args) ⇒ Object 



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# File 'lib/rerb/cli.rb', line 11

def parse(args)
  parser = OptionParser.new do |o|
    o.banner = "Usage: werb [options...] FILE"
    o.on(
      "--template TYPE",
      ["umd", "iife", "nil"],
      "Specify which html template to use to wrap the generated code. " \
        "Valid options are umd, iife, and nil.",
      "nil will use no template and just output raw ruby.wasm code. " \
        "Defaults to umd",
    )
    o.on(
      "--root NAME",
      "The html id of the root element to add all other DOM nodes to. " \
        'Defaults to "root"',
    )
    o.on("-v", "--version", "Output version information and exit.")
  end
  opts = {
    template: "umd",
    document: "document",
    root: "root",
    el_prefix: "el",
  }
  parser.parse!(args, into: opts)

  filename = args.shift
  return puts parser.help if filename.nil?

  input = File.read(filename)
  case opts[:template]
  when "umd"
    res = UMDTemplater.new(filename, opts[:root])
      .generate(input)
  when "iife"
    res = IIFETemplater.new(filename, opts[:root])
      .generate(input)
  when "nil"
    res = Templater.new(filename, opts[:root])
      .generate(input)
  else
    raise "Invalid template option. Choose between umd, iife, nil."
  end
  puts res
end