Class: BowerRails::Performer

Inherits:
Object
  • Object
show all
Includes:
FileUtils
Defined in:
lib/bower-rails/performer.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.perform(*args, &block) ⇒ Object 



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# File 'lib/bower-rails/performer.rb', line 10

def self.perform(*args, &block)
  new.perform(*args, &block)
end

Instance Method Details

#dsl ⇒ Object 



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# File 'lib/bower-rails/performer.rb', line 42

def dsl
  @dsl ||= BowerRails::Dsl.evalute(root_path, "Bowerfile")
end

#dsl_perform_command(remove_components = true, &block) ⇒ Object 



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# File 'lib/bower-rails/performer.rb', line 46

def dsl_perform_command(remove_components = true, &block)
  if remove_components
    dsl.write_bower_json
    dsl.write_dotbowerrc
    puts "bower.js files generated"
  end

  if block_given?
    dsl.directories.each do |dir|
      Dir.chdir(dir) do
        yield
      end
    end
  end
end

#find_command(cmd, paths = []) ⇒ Object

http://stackoverflow.com/questions/2108727/which-in-ruby-checking-if-program-exists-in-path-from-ruby



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# File 'lib/bower-rails/performer.rb', line 185

def find_command(cmd, paths = [])
  exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']
  paths += ENV['PATH'].split(File::PATH_SEPARATOR)
  paths.each do |path|
    exts.each do |ext|
      exe = File.join(path, "#{cmd}#{ext}")
      if (File.executable?(exe) && File.file?(exe))
        return Shellwords.escape exe
      end
    end
  end
  nil
end

#perform(remove_components = true, &block) ⇒ Object 



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# File 'lib/bower-rails/performer.rb', line 18

def perform(remove_components = true, &block)
  npm_path = File.join(root_path, 'node_modules', '.bin')
  bower = find_command('bower', [npm_path])

  if bower.nil?
    $stderr.puts ["Bower not found! You can install Bower using Node and npm:",
    "$ npm install bower -g",
    "For more info see http://bower.io/"].join("\n")
    exit 127
  end

  if entries.include?('Bowerfile')
    dsl_perform_command remove_components do
      instance_exec(bower, &block) if block_given?
    end
  elsif entries.include?('bower.json')
    perform_command remove_components do
      instance_exec(bower, &block) if block_given?
    end
  else
    raise LoadError, "No Bowerfile or bower.json file found. Make sure you have it at the root of your project"
  end
end

#perform_command(remove_components = true, &block) ⇒ Object

run the passed bower block in appropriate folders



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# File 'lib/bower-rails/performer.rb', line 63

def perform_command(remove_components = true, &block)
  # Load in bower json file
  txt  = File.read(File.join(root_path, "bower.json"))
  json = JSON.parse(txt)


  # Load and merge root .bowerrc
  dot_bowerrc = JSON.parse(File.read(File.join(root_path, '.bowerrc'))) rescue {}
  dot_bowerrc["directory"] = components_directory

  if json.reject{ |key| ['lib', 'vendor'].include? key }.empty?
    folders = json.keys
  else
    raise "Assuming a standard bower package but cannot find the required 'name' key" unless !!json['name']
    folders = ['vendor']
  end

  folders.each do |dir|
    data = json[dir]

    # Assume using standard bower.json if folder name is not found
    data = json if data.nil?

    # Check folder existence and create?
    dir = File.join(root_path, dir, "assets")
    FileUtils.mkdir_p dir unless File.directory? dir
    # Go in to dir to act
    Dir.chdir(dir) do

      # Remove old components
      FileUtils.rm_rf("#{components_directory}/*") if remove_components

      # Create bower.json
      File.open("bower.json", "w") do |f|
        f.write(data.to_json)
      end

      # Create .bowerrc
      File.open(".bowerrc", "w") do |f|
        f.write(JSON.pretty_generate(dot_bowerrc))
      end

      # Run command
      yield  if block_given?

      # Remove bower.json
      FileUtils.rm("bower.json")

      # Remove .bowerrc
      FileUtils.rm(".bowerrc")
    end if data && !data["dependencies"].empty?
  end
end

#remove_extra_files ⇒ Object 



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# File 'lib/bower-rails/performer.rb', line 146

def remove_extra_files
  puts "\nAttempting to remove all but main files as specified by bower\n"

  Dir["#{components_directory}/*"].each do |component_dir|
    component_name = component_dir.split('/').last
    next if clean_should_skip_component? component_name

    if File.exists?(File.join(component_dir, 'bower.json'))
      bower_file = File.read(File.join(component_dir, 'bower.json'))
    elsif File.exists?(File.join(component_dir, '.bower.json'))
      bower_file = File.read(File.join(component_dir, '.bower.json'))
    else
      next
    end

    # Parse bower.json
    bower_json = JSON.parse(bower_file)
    main_files = Array(bower_json['main']) + main_files_for_component(component_name)
    next if main_files.empty?

    # Remove "./" relative path from main file strings
    main_files.map! { |file| File.join(component_dir, file.gsub(/^\.\//, '')) }

    # Make Regexp to handle wildcards
    main_files.map! { |file| Regexp.new("\\A" + file.gsub(/\*/, '.*') + "\\Z") }

    # Delete all files that are not in main
    Find.find(component_dir).reverse_each do |file_or_dir|
      next if main_files.any? { |pattern| file_or_dir =~ pattern }
      if File.directory?(file_or_dir)
        Dir.rmdir(file_or_dir) if (Dir.entries(file_or_dir) - %w[ . .. ]).empty?
      else
        FileUtils.rm(file_or_dir)
      end
    end
  end
end

#resolve_asset_paths(root_directory = components_directory) ⇒ Object 



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# File 'lib/bower-rails/performer.rb', line 117

def resolve_asset_paths(root_directory = components_directory)
  # Resolve relative paths in CSS
  Dir["#{components_directory}/**/*.css"].each do |filename|
    contents = File.read(filename) if FileTest.file?(filename)
    # http://www.w3.org/TR/CSS2/syndata.html#uri
    url_regex = /url\((?!\#)\s*['"]?((?![a-z]+:)([^'"\)]*?)([?#][^'"\)]*)?)['"]?\s*\)/

    # Resolve paths in CSS file if it contains a url
    if contents =~ url_regex
      directory_path = Pathname.new(File.dirname(filename))
      .relative_path_from(Pathname.new(root_directory))

      # Replace relative paths in URLs with Rails asset_path helper
      new_contents = contents.gsub(url_regex) do |match|
        relative_path = $2
        params = $3
        image_path = directory_path.join(relative_path).cleanpath
        puts "#{match} => #{image_path} #{params}"

        "url(<%= asset_path '#{image_path}' %>#{params})"
      end

      # Replace CSS with ERB CSS file with resolved asset paths
      FileUtils.rm(filename)
      File.write(filename + '.erb', new_contents)
    end
  end
end

#root_path ⇒ Object 



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# File 'lib/bower-rails/performer.rb', line 14

def root_path
  BowerRails.root_path
end