rails_prep.rb - a ruby script to prepare a new rails application

create_gemset

#!/bin/bash
#
# I use this bash script to create an rvm gemset for a new rails app
# and I call this script from my rails_prep.rb ruby script
#
echo "create new gemset for new rails application ..."
#rvm --create 1.9.2@$1  # <--> this instruction does not work, but the following does
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" && rvm --create @$1
# -------------------------------
# Use the gemset we just created 
# --------------------------------------------------------------------------------------
#rvm gemset use 1.9.2@$1_rails323  # <--> this does not work, but the following does
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" && rvm use @$1
# the above line came from 
# http://stackoverflow.com/questions/8716987/how-to-change-rvm-gemset-using-bash-script
# --------------------------------------------------------------------------------------
echo "new gemset created"

rails_prep.rb

#!/usr/bin/env ruby
# =========================================================================
# This script will create a new rails app, a new git local repository, 
# substitute a new Gemfile and .gitignore file from 'master' copies, 
# run bundle install, run rspec:install and cucumber:install and 
# create and modify files for the gem 'simplecov'
#
# ** YOU WILL NEED TO MODIFY THE FILE PATHS for your own use! **
#
# usage: ruby rails_prep app_name OR
#        ./rails_prep app_name
#   for example, to create a new rails app named 'blog':
#   ruby rails_prep.rb blog
#     -- OR --
#   ./rails_prep blog
#
# This script does not perform error checking!  It assumes that the
# rails gem has already been installed.  It also assumes that the
# master files exist in the hard coded directories.  It also assumes
# that you are using (and your Gemfile includes) rspec, cucumber &
# simplecov.
# =========================================================================
#
require 'fileutils'
# -------------
# -- Methods --
# -------------
def modify_files(fn)
  # this method adds the 'require simplecov'
  # instruction to the file whose name is
  # passed as an argument
  puts "accessing #{fn} ..."
  f = File.open(fn, "r")
  f = f.readlines
  File.open(fn, "w") do |x|
    s = "require 'simplecov'\n\n"
    s = [s]
    contents = s.concat(f)
    x.puts contents
  end
end
# **************************
# *** Begin Main Routine ***
# **************************
if ARGV[0].nil?
  puts "**************************************"
  puts "***      Forgetting something?     ***"
  puts "*** Please pass the rails app name ***"
  puts "***       (nothing done)           ***"
  puts "**************************************"
  exit
end
app_name = ARGV[0]

# ----------------------------------------------------------------
# -- create gemset for use with new rails application           --
#  (I use a bash script here because I could not figure out     --
#  how to create and use rvm gemsets from within a ruby script) --
# ----------------------------------------------------------------
puts "creating gemset for use with new rails app ..."
`./create_gemset #{app_name}`

# -----------------------------
# create new rails application
# -----------------------------
puts "create new rails application #{app_name} (please be patient)..."
result = `rails new #{app_name} -T`
if result.match("Rails is not currently installed")
  puts "Oops!  rails gem is not installed.  Exiting ..."
  exit
  #`gem install rails`
  #`rails new #{app_name} -T`
end
# change to the newly created rails app directory
FileUtils.cd(app_name)

# --------------------------------
# configure new rails application
# --------------------------------
#
# setup for git
#
puts "copy master .gitignore file ..."
`cp ~/rails_projects/master_files/gitignore .gitignore`
puts "creating git repository ..."
`git init`
puts "configure git for color output ..."
`git config color.ui true`
#
# replace default Gemfile with my master & install gems
#
puts "copy master Gemfile ..."
`cp ~/rails_projects/master_files/Gemfile Gemfile`
puts "install gems (please be patient)..."
`bundle install`
#
# setup app for testing
#
puts "setup rspec folders ..."
`rails generate rspec:install`
puts "setup cucumber folders ..."
`rails generate cucumber:install`
puts "set up development and test databases ..."
`rake db:migrate`
`rake db:test:prepare`
puts "copy 'training wheels' files (web_steps.rb, etc.)"
`rails generate cucumber_rails_training_wheels:install`
puts "copy master .simplecov file ..."
`cp ~/rails_projects/master_files/simplecov .simplecov`
puts "modifying test framework files to use simplecov ..."
puts "modifying env.rb ..."
modify_files("/Users/rab/rails_projects/#{app_name}/features/support/env.rb")
puts "modifying spec_helper.rb"
modify_files("/Users/rab/rails_projects/#{app_name}/spec/spec_helper.rb")
puts "** Done! **"