Class: Jets::Builders::ReconfigureRails

Inherits:
Object
  • Object
show all
Defined in:
lib/jets/builders/reconfigure_rails.rb

Instance Method Summary collapse

Constructor Details

#initialize(full_app_root) ⇒ ReconfigureRails

Returns a new instance of ReconfigureRails.



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# File 'lib/jets/builders/reconfigure_rails.rb', line 4

def initialize(full_app_root)
  # IE: @app_root: /tmp/jets/demo/stage/code/rack
  @app_root = full_app_root
end

Instance Method Details

#add_jets_rails_gem(lines) ⇒ Object 



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# File 'lib/jets/builders/reconfigure_rails.rb', line 38

def add_jets_rails_gem(lines)
  return lines if lines.detect { |l| l =~ /jets-rails/ }
  lines << "\n"
  lines << %Q|gem "jets-rails"\n|
  lines
end

#comment_out_ruby_declaration(lines) ⇒ Object

Jets packages up and uses only one version of ruby and different declarations of ruby can cause issues.



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# File 'lib/jets/builders/reconfigure_rails.rb', line 47

def comment_out_ruby_declaration(lines)
  lines.map do |l|
    l =~ /^(ruby[ (].*)/ ? "# #{$1} # commented out by jets" : l
  end
end

#copy_initializer ⇒ Object 



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# File 'lib/jets/builders/reconfigure_rails.rb', line 21

def copy_initializer
  templates = File.expand_path("./reconfigure_rails", File.dirname(__FILE__))
  relative_path = "config/initializers/jets.rb"
  src = "#{templates}/#{relative_path}"
  dest = "#{@app_root}/#{relative_path}"
  FileUtils.mkdir_p(File.dirname(dest))
  FileUtils.cp(src, dest)
end

#rails? ⇒ Boolean

Rudimentary rails detection

Returns:

  • (Boolean) 


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# File 'lib/jets/builders/reconfigure_rails.rb', line 93

def rails?
  config_ru = "#{@app_root}/config.ru"
  return false unless File.exist?(config_ru)
  !IO.readlines(config_ru).grep(/Rails.application/).empty?
end

#run ⇒ Object

Only support Rails right now. Maybe move into plugin when adding support to more frameworks. Or maybe better to just abstract but maintain in Jets.



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# File 'lib/jets/builders/reconfigure_rails.rb', line 11

def run
  return unless rails?

  puts "Mega Mode: Reconfiguring Rails app."
  copy_initializer
  update_gemfile
  update_development_environment
  set_favicon
end

#set_favicon ⇒ Object

Evaluate the application layout and see if has a custom favicon defined yet. If not insert one and rewrite the application layout.

This avoids serving binary assets from API gateway, instead serve it from s3 directly.



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# File 'lib/jets/builders/reconfigure_rails.rb', line 70

def set_favicon
  app_layout = "#{@app_root}/app/views/layouts/application.html.erb"
  return  unless File.exist?(app_layout)

  favicon = '<link rel="shortcut icon" href="<%= asset_path("/favicon.ico") %>">'

  lines = IO.readlines(app_layout)
  has_favicon = !!lines.find { |l| l.include?(favicon) }
  return if has_favicon

  content = IO.read(app_layout)
  content = content.sub('</head>', "\n    #{favicon}\n  </head>")

  IO.write(app_layout, content)
end

#update_development_environment ⇒ Object 



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# File 'lib/jets/builders/reconfigure_rails.rb', line 53

def update_development_environment
  env_file = "#{@app_root}/config/environments/development.rb"
  lines = IO.readlines(env_file)
  new_lines = lines.map do |line|
    if line =~ /(config\.file_watcher.*)/
      "  # #{$1} # commented out by jets\n"
    else
      line
    end
  end
  write_content(env_file, new_lines)
end

#update_gemfile ⇒ Object 



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# File 'lib/jets/builders/reconfigure_rails.rb', line 30

def update_gemfile
  gemfile = "#{@app_root}/Gemfile"
  lines = IO.readlines(gemfile)
  lines = add_jets_rails_gem(lines)
  lines = comment_out_ruby_declaration(lines)
  write_content(gemfile, lines)
end

#write_content(path, lines) ⇒ Object

lines is an Array



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# File 'lib/jets/builders/reconfigure_rails.rb', line 87

def write_content(path, lines)
  content = lines.join + "\n"
  IO.write(path, content)
end