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require File.dirname(__FILE__) + '/scm/scm'
require File.dirname(__FILE__) + '/scm/git'
require File.dirname(__FILE__) + '/scm/svn'
require 'open-uri'
require 'fileutils'
module Rails
class TemplateRunner
attr_reader :root
attr_writer :logger
def initialize(template, root = '') # :nodoc:
@root = File.expand_path(File.directory?(root) ? root : File.join(Dir.pwd, root))
log 'applying', "template: #{template}"
load_template(template)
log 'applied', "#{template}"
end
def load_template(template)
begin
code = open(template).read
in_root { self.instance_eval(code) }
rescue LoadError, Errno::ENOENT => e
raise "The template [#{template}] could not be loaded. Error: #{e}"
end
end
# Create a new file in the Rails project folder. Specify the
# relative path from RAILS_ROOT. Data is the return value of a block
# or a data string.
#
# ==== Examples
#
# file("lib/fun_party.rb") do
# hostname = ask("What is the virtual hostname I should use?")
# "vhost.name = #{hostname}"
# end
#
# file("config/apach.conf", "your apache config")
#
def file(filename, data = nil, log_action = true, &block)
log 'file', filename if log_action
dir, file = [File.dirname(filename), File.basename(filename)]
inside(dir) do
File.open(file, "w") do |f|
if block_given?
f.write(block.call)
else
f.write(data)
end
end
end
end
# Install a plugin. You must provide either a Subversion url or Git url.
# For a Git-hosted plugin, you can specify if it should be added as a submodule instead of cloned.
#
# ==== Examples
#
# plugin 'restful-authentication', :git => 'git://github.com/technoweenie/restful-authentication.git'
# plugin 'restful-authentication', :git => 'git://github.com/technoweenie/restful-authentication.git', :submodule => true
# plugin 'restful-authentication', :svn => 'svn://svnhub.com/technoweenie/restful-authentication/trunk'
#
def plugin(name, options)
log 'plugin', name
if options[:git] && options[:submodule]
in_root do
Git.run("submodule add #{options[:git]} vendor/plugins/#{name}")
end
elsif options[:git] || options[:svn]
in_root do
run("script/plugin install #{options[:svn] || options[:git]}", false)
end
else
log "! no git or svn provided for #{name}. skipping..."
end
end
# Adds an entry into config/environment.rb for the supplied gem :
def gem(name, options = {})
log 'gem', name
gems_code = "config.gem '#{name}'"
if options.any?
opts = options.inject([]) {|result, h| result << [":#{h[0]} => '#{h[1]}'"] }.join(", ")
gems_code << ", #{opts}"
end
environment gems_code
end
# Adds a line inside the Initializer block for config/environment.rb. Used by #gem
def environment(data = nil, &block)
sentinel = 'Rails::Initializer.run do |config|'
data = block.call if !data && block_given?
in_root do
gsub_file 'config/environment.rb', /(#{Regexp.escape(sentinel)})/mi do |match|
"#{match}\n " << data
end
end
end
# Run a command in git.
#
# ==== Examples
#
# git :init
# git :add => "this.file that.rb"
# git :add => "onefile.rb", :rm => "badfile.cxx"
#
def git(command = {})
in_root do
if command.is_a?(Symbol)
log 'running', "git #{command}"
Git.run(command.to_s)
else
command.each do |command, options|
log 'running', "git #{command} #{options}"
Git.run("#{command} #{options}")
end
end
end
end
# Create a new file in the vendor/ directory. Code can be specified
# in a block or a data string can be given.
#
# ==== Examples
#
# vendor("sekrit.rb") do
# sekrit_salt = "#{Time.now}--#{3.years.ago}--#{rand}--"
# "salt = '#{sekrit_salt}'"
# end
#
# vendor("foreign.rb", "# Foreign code is fun")
#
def vendor(filename, data = nil, &block)
log 'vendoring', filename
file("vendor/#{filename}", data, false, &block)
end
# Create a new file in the lib/ directory. Code can be specified
# in a block or a data string can be given.
#
# ==== Examples
#
# lib("crypto.rb") do
# "crypted_special_value = '#{rand}--#{Time.now}--#{rand(1337)}--'"
# end
#
# lib("foreign.rb", "# Foreign code is fun")
#
def lib(filename, data = nil, &block)
log 'lib', filename
file("lib/#{filename}", data, false, &block)
end
# Create a new Rakefile with the provided code (either in a block or a string).
#
# ==== Examples
#
# rakefile("bootstrap.rake") do
# project = ask("What is the UNIX name of your project?")
#
# <<-TASK
# namespace :#{project} do
# task :bootstrap do
# puts "i like boots!"
# end
# end
# TASK
# end
#
# rakefile("seed.rake", "puts 'im plantin ur seedz'")
#
def rakefile(filename, data = nil, &block)
log 'rakefile', filename
file("lib/tasks/#{filename}", data, false, &block)
end
# Create a new initializer with the provided code (either in a block or a string).
#
# ==== Examples
#
# initializer("globals.rb") do
# data = ""
#
# ['MY_WORK', 'ADMINS', 'BEST_COMPANY_EVAR'].each do
# data << "#{const} = :entp"
# end
#
# data
# end
#
# initializer("api.rb", "API_KEY = '123456'")
#
def initializer(filename, data = nil, &block)
log 'initializer', filename
file("config/initializers/#{filename}", data, false, &block)
end
# Generate something using a generator from Rails or a plugin.
# The second parameter is the argument string that is passed to
# the generator or an Array that is joined.
#
# ==== Example
#
# generate(:authenticated, "user session")
#
def generate(what, *args)
log 'generating', what
argument = args.map(&:to_s).flatten.join(" ")
in_root { run("script/generate #{what} #{argument}", false) }
end
# Executes a command
#
# ==== Example
#
# inside('vendor') do
# run('ln -s ~/edge rails)
# end
#
def run(command, log_action = true)
log 'executing', "#{command} from #{Dir.pwd}" if log_action
`#{command}`
end
# Runs the supplied rake task
#
# ==== Example
#
# rake("db:migrate")
# rake("db:migrate", :env => "production")
# rake("gems:install", :sudo => true)
#
def rake(command, options = {})
log 'rake', command
env = options[:env] || 'development'
sudo = options[:sudo] ? 'sudo ' : ''
in_root { run("#{sudo}rake #{command} RAILS_ENV=#{env}", false) }
end
# Just run the capify command in root
#
# ==== Example
#
# capify!
#
def capify!
log 'capifying'
in_root { run('capify .', false) }
end
# Add Rails to /vendor/rails
#
# ==== Example
#
# freeze!
#
def freeze!(args = {})
log 'vendor', 'rails edge'
in_root { run('rake rails:freeze:edge', false) }
end
# Make an entry in Rails routing file conifg/routes.rb
#
# === Example
#
# route "map.root :controller => :welcome"
#
def route(routing_code)
log 'route', routing_code
sentinel = 'ActionController::Routing::Routes.draw do |map|'
in_root do
gsub_file 'config/routes.rb', /(#{Regexp.escape(sentinel)})/mi do |match|
"#{match}\n #{routing_code}\n"
end
end
end
protected
# Get a user's input
#
# ==== Example
#
# answer = ask("Should I freeze the latest Rails?")
# freeze! if ask("Should I freeze the latest Rails?") == "yes"
#
def ask(string)
log '', string
gets.strip
end
# Do something in the root of the Rails application or
# a provided subfolder; the full path is yielded to the block you provide.
# The path is set back to the previous path when the method exits.
def inside(dir = '', &block)
folder = File.join(root, dir)
FileUtils.mkdir_p(folder) unless File.exist?(folder)
FileUtils.cd(folder) { block.arity == 1 ? yield(folder) : yield }
end
def in_root
FileUtils.cd(root) { yield }
end
# Helper to test if the user says yes(y)?
#
# ==== Example
#
# freeze! if yes?("Should I freeze the latest Rails?")
#
def yes?(question)
answer = ask(question).downcase
answer == "y" || answer == "yes"
end
# Helper to test if the user does NOT say yes(y)?
#
# ==== Example
#
# capify! if no?("Will you be using vlad to deploy your application?")
#
def no?(question)
!yes?(question)
end
def gsub_file(relative_destination, regexp, *args, &block)
path = destination_path(relative_destination)
content = File.read(path).gsub(regexp, *args, &block)
File.open(path, 'wb') { |file| file.write(content) }
end
def destination_path(relative_destination)
File.join(root, relative_destination)
end
def log(action, message = '')
logger.log(action, message)
end
def logger
@logger ||= Rails::Generator::Base.logger
end
end
end
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