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require 'fileutils'
require 'active_record/support/inflector'
module Generator
class GeneratorError < StandardError; end
class Base
@@template_root = File.dirname(__FILE__) + '/../generators/templates'
cattr_accessor :template_root
attr_reader :rails_root, :class_name, :file_name, :table_name,
:actions, :options
def initialize(rails_root, object_name, actions = [], options = {})
@rails_root = rails_root
@class_name = Inflector.camelize(object_name)
@file_name = Inflector.underscore(@class_name)
@table_name = Inflector.pluralize(@file_name)
@actions = actions
@options = options
# Use local templates if rails_root/generators directory exists.
local_template_root = File.join(@rails_root, 'generators')
if File.directory?(local_template_root)
self.class.template_root = local_template_root
end
end
protected
# Generate a file in a fresh Rails app from an ERB template.
# Takes a template path relative to +template_root+, a
# destination path relative to +rails_root+, evaluates the template,
# and writes the result to the destination.
def generate_file(template_file_path, rails_file_path, eval_binding = nil)
# Determine full paths for source and destination files.
template_path = File.join(template_root, template_file_path)
rails_path = File.join(rails_root, rails_file_path)
# Create destination directories.
FileUtils.mkdir_p(File.dirname(rails_path))
# Render template and write result.
eval_binding ||= binding
contents = ERB.new(File.read(template_path), nil, '-').result(eval_binding)
File.open(rails_path, 'w') { |file| file.write(contents) }
end
end
# Generate controller, helper, functional test, and views.
class Controller < Base
def generate
options[:scaffold] = file_name if options[:scaffold]
# Controller class.
generate_file "controller.erb", "app/controllers/#{file_name}_controller.rb"
# Helper class.
generate_file "helper.erb", "app/helpers/#{file_name}_helper.rb"
# Function test.
generate_file "controller_test.erb", "test/functional/#{file_name}_controller_test.rb"
# Create the views directory even if there are no actions.
FileUtils.mkdir_p "app/views/#{file_name}"
# View template for each action.
@actions.each do |action|
generate_file "controller_view.rhtml",
"app/views/#{file_name}/#{action}.rhtml",
binding
end
end
end
# Generate model, unit test, and fixtures.
class Model < Base
def generate
# Model class.
generate_file "model.erb", "app/models/#{file_name}.rb"
# Model unit test.
generate_file "model_test.erb", "test/unit/#{file_name}_test.rb"
# Test fixtures directory.
FileUtils.mkdir_p("test/fixtures/#{table_name}")
end
end
# Generate mailer, helper, functional test, and views.
class Mailer < Base
def generate
# Mailer class.
generate_file "mailer.erb", "app/models/#{file_name}.rb"
# Mailer unit test.
generate_file "mailer_test.erb", "test/unit/#{file_name}_test.rb"
# Test fixtures directory.
FileUtils.mkdir_p("test/fixtures/#{table_name}")
# View template and fixture for each action.
@actions.each do |action|
generate_file "mailer_action.rhtml",
"app/views/#{file_name}/#{action}.rhtml",
binding
generate_file "mailer_fixture.rhtml",
"test/fixtures/#{table_name}/#{action}",
binding
end
end
end
end
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