Class: Haml::Exec::HamlSass

Inherits:

Generic

• Object
• Generic
• Haml::Exec::HamlSass

Defined in:

lib/haml/exec.rb

Overview

An abstrac class that encapsulates the code specific to the haml and sass executables.

Direct Known Subclasses

Haml, Sass

Constant Summary

Constants inherited from Generic

Generic::COLORS

Instance Method Summary

• #initialize(args) ⇒ HamlSass constructor

  A new instance of HamlSass.

• #process_result protected

  Processes the options set by the command-line arguments.

• #set_opts(opts) protected

  Tells optparse how to parse the arguments available for the haml and sass executables.

Methods inherited from Generic

#color, #get_line, #parse, #parse!, #puts_action, #to_s

Constructor Details

#initialize(args) ⇒ HamlSass

Returns a new instance of HamlSass.

Parameters:

• args (Array<String>) —

  The command-line arguments

# File 'lib/haml/exec.rb', line 175

def initialize(args)
  super
  @options[:for_engine] = {}
end

Instance Method Details

#process_result (protected)

Processes the options set by the command-line arguments. In particular, sets @options[:for_engine][:filename] to the input filename and requires the appropriate file.

This is meant to be overridden by subclasses so they can run their respective programs.

# File 'lib/haml/exec.rb', line 259

def process_result
  super
  @options[:for_engine][:filename] = @options[:filename] if @options[:filename]
  require File.dirname(__FILE__) + "/../#{@name.downcase}"
end

#set_opts(opts) (protected)

Tells optparse how to parse the arguments available for the haml and sass executables.

This is meant to be overridden by subclasses so they can add their own options.

Parameters:

• opts (OptionParser)

# File 'lib/haml/exec.rb', line 189

def set_opts(opts)
  opts.banner = <<END
Usage: #{@name.downcase} [options] [INPUT] [OUTPUT]

Description:
  Uses the #{@name} engine to parse the specified template
  and outputs the result to the specified file.

Options:
END

  opts.on('--rails RAILS_DIR', "Install Haml and Sass from the Gem to a Rails project") do |dir|
    original_dir = dir

    env = File.join(dir, "config", "environment.rb")
    if File.exists?(File.join(dir, "Gemfile"))
      puts("haml --rails isn't needed for Rails 3 or greater.",
        "Add 'gem \"haml\"' to your Gemfile instead.", "",
        "haml --rails will no longer work in the next version of #{@name}.", "")
    elsif File.exists?(env) && File.open(env) {|env| env.grep(/config\.gem/)}
      puts("haml --rails isn't needed for Rails 2.1 or greater.",
        "Add 'gem \"haml\"' to config/environment.rb instead.", "",
        "haml --rails will no longer work in the next version of #{@name}.", "")
    end

    dir = File.join(dir, 'vendor', 'plugins')

    unless File.exists?(dir)
      puts "Directory #{dir} doesn't exist"
      exit 1
    end

    dir = File.join(dir, 'haml')

    if File.exists?(dir)
      print "Directory #{dir} already exists, overwrite [y/N]? "
      exit 2 if gets !~ /y/i
      FileUtils.rm_rf(dir)
    end

    begin
      Dir.mkdir(dir)
    rescue SystemCallError
      puts "Cannot create #{dir}"
      exit 1
    end

    File.open(File.join(dir, 'init.rb'), 'w') do |file|
      file << File.read(File.dirname(__FILE__) + "/../../init.rb")
    end

    puts "Haml plugin added to #{original_dir}"
    exit
  end

  opts.on('-c', '--check', "Just check syntax, don't evaluate.") do
    require 'stringio'
    @options[:check_syntax] = true
    @options[:output] = StringIO.new
  end

  super
end