Two scripts to be put into the script folder of a rails app. ./script/setup prepares the app/system/dependencies for booting the app for the first time. ./script/bootstrap should be run whenever changes from collaborators are pulled in. It installs dependencies and updates gems if necessary. It is fast, because actions are only executed if there…

bootstrap.rb

# ./script/bootstrap

#!/usr/bin/env ruby
require 'fileutils'

# Capture ctrl-c and exit with a message.
Signal.trap("SIGINT") do
  puts ; puts "Buh bye".red
  exit 1
end

# MONKEY PATCH TIME!
class String
  # colorization
  def colorize(color_code) ; "\e[#{color_code}m#{self}\e[0m" ; end
  def red ;    colorize(31) ; end
  def green ;  colorize(32) ; end
  def yellow ; colorize(33) ; end
  def pink ;   colorize(35) ; end
end



# Returns true if command is in $PATH, false otherwise.
def command?(command)
  system("which #{command} > /dev/null 2>&1")
end

def checksums(file)
  checksum = `cksum #{file}`.to_i
  installed = File.read(".checksums/#{file}").to_i rescue nil
  [checksum, installed]
end

def write_checksum(file, checksum)
  File.open(".checksums/#{file}", 'wb') { |fd| fd.puts(checksum) }
end


def update_dependencies!
  if !command?('brewdle')
    puts "Brewdle is not installed. Installing now.".yellow
    system('gem install brewdler')
  end

  file = 'Brewfile'
  checksum, installed = checksums(file)
  if checksum == installed
    puts "All dependencies are installed.".green
  else
    puts "Some or all dependencies are missing. Installing them now.".yellow
    puts `brewdle install`
    write_checksum(file, checksum)
    # puts "Done".green
  end
end

# Checks if the Gemfile has changed after pull. If yes, run bundle update.
def update_gems!
  file = 'Gemfile'
  checksum, installed = checksums(file)

  if checksum == installed && system('bundle check 1>/dev/null 2>&1')
    puts "Gem environment up-to-date.".green
  else
    puts "Your Gemfile is not up to date. Running 'bundle install'.".yellow
    system('bundle install')
    write_checksum(file, checksum)
    # puts "Done".green
  end
end




# Project Root
root = File.expand_path('../..', __FILE__)
Dir.chdir(root)

# Create the local .checksums directory
FileUtils.mkdir_p('.checksums')


update_dependencies!

update_gems!

puts "Everything should to be up to date now."
puts "Start your external dependencies by running "
puts "`foreman start -f Procfile.dev`".yellow

setup.rb

# ./script/setup

#!/usr/bin/env ruby
require 'fileutils'

ROOT = File.expand_path('../..', __FILE__)
PROJECT = File.basename(ROOT)
Dir.chdir(ROOT)

# Capture ctrl-c and exit with a message.
Signal.trap("SIGINT") do
  puts ; puts "Buh bye".red
  exit 1
end

# MONKEY PATCH TIME!
class String
  # colorization
  def colorize(color_code) ; "\e[#{color_code}m#{self}\e[0m" ; end
  def red ;    colorize(31) ; end
  def green ;  colorize(32) ; end
  def yellow ; colorize(33) ; end
  def pink ;   colorize(35) ; end
end

def setup_pow!
  port = File.read(File.join([ROOT, '.foreman'])).split(':').last.strip
  path_to_pow = [File.readlink("/Users/#{`whoami`.strip}/.pow")
  puts "linking #{PROJECT} to POW! using port #{port}"
  File.open(File.join(path_to_pow, PROJECT]), 'w+') {|f| f.write(port) }
  puts "#{PROJECT} is now available as http://#{PROJECT.downcase}.dev".green
rescue
  puts "Cannot link POW!".red
  abort
end

puts "This script assumes that you have set up your system as a developer machine."
puts "If you have not, press CTRL-C now and run the setup script,"
puts "otherwise hit enter to continue. Also make sure your Ruby env is set up."


# wait for input
input = gets.chomp


# Set up pow! for this machine.
setup_pow!


exec './script/bootstrap'