Ruby development stack presentation

bundle_config.yml

---
BUNDLE_PATH: vendor/bundle

bundle_install_example.sh

# install all gems in ./vendor/bundle
$ bundle install --path=vendor/bundle
# install gems' binaries in ./bin
$ bundle install --binstubs
# use the installed bin instead of `bundle exec`
$ bin/rake

bundler_ruby_usage.rb

# encoding: utf-8

# Bundler must be in the global load path.
require 'bundler'
# Require the gems declared in the Gemfile
# you can require by groups
Bundler.require(:default, :test)

# or you can do:
#   Bundler.setup(:default, :test)
#   require 'rake'

# Use the gems
Rake::Task['test'].invoke

gem_install.sh

$ gem install rake --version 0.3.1 --force

Gemfile

# encoding: utf-8

# Gemfile
source 'https://rubygems.org/'

gem 'rake'             # up to date version
gem 'rack', '~> 1.4.1' # pessimistic version
gem 'thin', '= 1.5'    # exact version
group :test do
  gem 'rspec'
end

irb_example.sh

$ irb
irb(main):001:0> IRB.rc_file
=> "/Users/jhbabon/.irbrc"
irb(main):002:0> hello = lambda { |p| puts "Hello #{p}" }
=> #<Proc:0x007fdc14873398@(irb):22 (lambda)>
irb(main):003:0> hello.call('world')
Hello world
=> nil

rails_generators_examples.sh

$ bundle exec rails g
Usage: rails generate GENERATOR [args] [options]

General options:
  -h, [--help]     # Print generator's options and usage
  -p, [--pretend]  # Run but do not make any changes
  -f, [--force]    # Overwrite files that already exist
  -s, [--skip]     # Skip files that already exist
  -q, [--quiet]    # Suppress status output

Please choose a generator below.

Rails:
  controller
  generator
  helper
  mailer
  migration
  model
  observer
  responders_controller
  scaffold

ActiveRecord:
  active_record:devise
# and more...

rails_task_example.sh

# set the Rails environment with an shell env variable
$ RAILS_ENV=staging bundle exec rake db:migrate
# show all tasks
$ bundle exec rake -T
rake db:create  # Create the database from config/database.yml for the current Rails.env (use db:cr...
rake db:drop    # Drops the database for the current Rails.env (use db:drop:all to drop all databases)
rake db:migrate # Migrate the database (options: VERSION=x, VERBOSE=false). 
rake log:clear  # Truncates all *.log files in log/ to zero bytes
rake middleware # Prints out your Rack middleware stack
rake notes      # Enumerate all annotations (use notes:optimize, :fixme, :todo for focus)
rake routes     # Print out all defined routes in match
# many more...

rake_usage_example.sh

# call default task
$ bundle exec rake
# or a explicit task
$ bundle exec rake test

Rakefile

# encoding: utf-8

# Rakefile
# example from: http://rake.rubyforge.org/
task default: [:test]

desc "Run all tests"
task :test do
  $stdout.puts "---> Running all tests"
  ruby "test/unittest.rb"
end