Add application templates for rails3

templates/rails.rb

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+apply 'http://datamapper.org/templates/rails/gemfile.rb'
+apply 'http://datamapper.org/templates/rails/application.rb'

templates/rails/application.rb

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+# This needs to be called after one of the gemfile templates
+
+apply 'http://datamapper.org/templates/rails/config.rb'
+apply 'http://datamapper.org/templates/rails/database.yml.rb'
+
+initializer 'jruby_monkey_patch.rb', <<-CODE
+if RUBY_PLATFORM =~ /java/
+  # ignore the anchor to allow this to work with jruby:
+  # http://jira.codehaus.org/browse/JRUBY-4649
+  class Rack::Mount::Strexp
+
+    class << self
+      alias :compile_old :compile
+      def compile(str, requirements, separators, anchor)
+        self.compile_old(str, requirements, separators)
+      end
+    end
+  end
+end
+CODE
+
+say ''
+say '--------------------------------------------------------------------------'
+say "Edit your Gemfile (don't forget to run 'bundle install' after doing that)"
+say 'Generate a scaffold: rails generate scaffold Person name:string'
+say 'Automigrate the DB:  rake db:automigrate'
+say 'Start the server:    rails server'
+say '--------------------------------------------------------------------------'
+say 'After the sever booted, point your browser at http://localhost:3000/people'
+say '--------------------------------------------------------------------------'
+say ''

templates/rails/config.rb

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+gsub_file 'config/application.rb', /require 'rails\/all'/ do
+<<-RUBY
+# Pick the frameworks you want:
+require 'action_controller/railtie'
+require 'dm-rails/railtie'
+# require 'action_mailer/railtie'
+# require 'active_resource/railtie'
+# require 'rails/test_unit/railtie'
+RUBY
+end
+
+gsub_file 'config/environments/development.rb', /config.action_mailer.raise_delivery_errors = false/ do
+  "# config.action_mailer.raise_delivery_errors = false"
+end
+
+gsub_file 'config/environments/test.rb', /config.action_mailer.delivery_method = :test/ do
+  "# config.action_mailer.delivery_method = :test"
+end

templates/rails/database.yml.rb

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+# TODO think about a better way
+db_name = app_path.split('/').last
+
+remove_file 'config/database.yml'
+create_file 'config/database.yml' do
+<<-YAML
+defaults: &defaults
+  adapter: sqlite3
+
+development:
+  database: #{db_name}_development.db
+  <<: *defaults
+
+  # Add more repositories
+  # repositories:
+  #   repo1:
+  #     adapter:  postgresql
+  #     database: sample_development
+  #     username: the_user
+  #     password: secrets
+  #     host:     localhost
+  #   repo2:
+  #     ...
+
+test:
+  database: #{db_name}_app_test.db
+  <<: *defaults
+production:
+  database: #{db_name}_app_production.db
+  <<: *defaults
+YAML
+end

templates/rails/gemfile.rb

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+# workaround <<-GEMFILE wanting to
+# execute the string subsitution
+DATAMAPPER = '#{DATAMAPPER}'
+RSPEC      = '#{RSPEC}'
+
+remove_file 'Gemfile'
+create_file 'Gemfile' do
+<<-GEMFILE
+source 'http://rubygems.org'
+
+RAILS_VERSION = '~> 3.0.0.beta3'
+
+DM_VERSION    = '~> 1.0.0.rc3'
+
+RSPEC_VERSION = '~> 2.0.0.beta.9'
+
+gem 'activesupport',      RAILS_VERSION, :require => 'active_support'
+gem 'actionpack',         RAILS_VERSION, :require => 'action_pack'
+gem 'actionmailer',       RAILS_VERSION, :require => 'action_mailer'
+gem 'railties',           RAILS_VERSION, :require => 'rails'
+
+gem 'dm-rails',             DM_VERSION
+gem 'dm-sqlite-adapter',    DM_VERSION
+
+# You can use any of the other available database adapters.
+# This is only a small excerpt of the list of all available adapters
+# Have a look at
+#
+#  http://wiki.github.com/datamapper/dm-core/adapters
+#  http://wiki.github.com/datamapper/dm-core/community-plugins
+#
+# for a rather complete list of available datamapper adapters and plugins
+
+# gem 'dm-mysql-adapter',     DM_VERSION
+# gem 'dm-postgres-adapter',  DM_VERSION
+# gem 'dm-oracle-adapter',    DM_VERSION
+# gem 'dm-sqlserver-adapter', DM_VERSION
+
+gem 'dm-migrations',        DM_VERSION
+gem 'dm-types',             DM_VERSION
+gem 'dm-validations',       DM_VERSION
+gem 'dm-constraints',       DM_VERSION
+gem 'dm-transactions',      DM_VERSION
+gem 'dm-aggregates',        DM_VERSION
+gem 'dm-timestamps',        DM_VERSION
+gem 'dm-observer',          DM_VERSION
+
+group(:test) do
+
+  gem 'rspec',              RSPEC_VERSION
+  gem 'rspec-core',         RSPEC_VERSION, :require => 'rspec/core'
+  gem 'rspec-expectations', RSPEC_VERSION, :require => 'rspec/expectations'
+  gem 'rspec-mocks',        RSPEC_VERSION, :require => 'rspec/mocks'
+  gem 'rspec-rails',        '~> 2.0.0.beta.9.1'
+
+end
+
+# ------------------------------------------------------------------------------
+
+# These gems are only listed here in the Gemfile because we want to pin them
+# to the github repositories for as long as no stable version has been released.
+# The dm-core gem is a hard dependency for dm-rails so it would get pulled in by
+# simply adding dm-rails. The dm-do-adapter gem is a hard dependency for any of
+# the available dm-xxx-adapters. Once we have stable gems available, pinning these
+# gems to github will be optional.
+
+gem 'dm-core',              DM_VERSION
+gem 'dm-do-adapter',        DM_VERSION
+gem 'dm-active_model',      DM_VERSION
+GEMFILE
+end