Ruby2.0, Rails4.0 beta1のインストール


## Ruby2.0のインストール

homebrewを使い、rbenv, ruby-buildでRubyをビルドする。

### rbenv, ruby-build

homebrewは既にインストールされてる前提で。

```
$ brew install rbenv
$ brew install ruby-build
```

### openssl, readline

OpenSSL, コンソールでの日本語利用のため、これらもインストールしておく。

```
$ brew install openssl
$ brew install readline
```

```
$ brew link openssl readline
```

こちらの記事
[homebrew で入れた openssl を使って Ruby をコンパイルすると SSL 利用時に証明書エラーが発生する場合の対応](http://qiita.com/items/12457815d5cee3723b97)
を参考に、curl-ca-bundleも。

```
$ brew install curl-ca-bundle
$ cp /usr/local/Cellar/curl-ca-bundle/1.87/share/ca-bundle.crt /usr/local/etc/openssl/cert.pem
```

### Ruby

オプションつけて、rubyをインストール。

```
$ RUBY_CONFIGURE_OPTS="--with-readline-dir=`brew --prefix readline` --with-openssl-dir=`brew --prefix openssl`" rbenv install 2.0.0-p0
```

早速Ruby2.0をデフォルトに。

```
$ rbenv global 2.0.0-p0
$ ruby -v
ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-darwin12.2.0]
```

bundlerも最後に入れとく。

```
$ gem install bundler
$ rbenv rehash
$ gem list bundler

*** LOCAL GEMS ***

bundler (1.3.0)
```

## Rails4.0 beta1のインストール
やっとgemでインストールできるようになった。。

```
$ gem install rails -v 4.0.0.beta1
$ rbenv rehash
$ rails -v
Rails 4.0.0.beta1
```

試しに`rails new`してみんとす

```
$ rails new hoge
      create  
      create  README.rdoc
      create  Rakefile
      create  config.ru
      create  .gitignore
      create  Gemfile
      create  app
      create  app/assets/images/rails.png
      create  app/assets/javascripts/application.js
      create  app/assets/stylesheets/application.css
      create  app/controllers/application_controller.rb
      create  app/helpers/application_helper.rb
      create  app/views/layouts/application.html.erb
      create  app/mailers/.keep
      create  app/models/.keep
      create  app/controllers/concerns/.keep
      create  app/models/concerns/.keep
      create  bin
      create  bin/bundle
      create  bin/rails
      create  bin/rake
      create  config
      create  config/routes.rb
      create  config/application.rb
      create  config/environment.rb
      create  config/environments
      create  config/environments/development.rb
      create  config/environments/production.rb
      create  config/environments/test.rb
      create  config/initializers
      create  config/initializers/backtrace_silencers.rb
      create  config/initializers/filter_parameter_logging.rb
      create  config/initializers/inflections.rb
      create  config/initializers/mime_types.rb
      create  config/initializers/secret_token.rb
      create  config/initializers/session_store.rb
      create  config/initializers/wrap_parameters.rb
      create  config/locales
      create  config/locales/en.yml
      create  config/boot.rb
      create  config/database.yml
      create  db
      create  db/seeds.rb
      create  lib
      create  lib/tasks
      create  lib/tasks/.keep
      create  lib/assets
      create  lib/assets/.keep
      create  log
      create  log/.keep
      create  public
      create  public/404.html
      create  public/422.html
      create  public/500.html
      create  public/favicon.ico
      create  public/robots.txt
      create  test/fixtures
      create  test/fixtures/.keep
      create  test/controllers
      create  test/controllers/.keep
      create  test/mailers
      create  test/mailers/.keep
      create  test/models
      create  test/models/.keep
      create  test/helpers
      create  test/helpers/.keep
      create  test/integration
      create  test/integration/.keep
      create  test/test_helper.rb
      create  tmp/cache
      create  tmp/cache/assets
      create  vendor/assets/javascripts
      create  vendor/assets/javascripts/.keep
      create  vendor/assets/stylesheets
      create  vendor/assets/stylesheets/.keep
         run  bundle install
Fetching gem metadata from https://rubygems.org/...........
Fetching gem metadata from https://rubygems.org/..
Resolving dependencies...
Installing rake (10.0.3) 
Using i18n (0.6.4) 
Installing minitest (4.6.2) 
Using multi_json (1.6.1) 
Using atomic (1.0.1) 
Using thread_safe (0.1.0) 
Using tzinfo (0.3.35) 
Using activesupport (4.0.0.beta1) 
Using builder (3.1.4) 
Using erubis (2.7.0) 
Using rack (1.5.2) 
Using rack-test (0.6.2) 
Using actionpack (4.0.0.beta1) 
Using mime-types (1.21) 
Using polyglot (0.3.3) 
Using treetop (1.4.12) 
Using mail (2.5.3) 
Using actionmailer (4.0.0.beta1) 
Using activemodel (4.0.0.beta1) 
Using activerecord-deprecated_finders (0.0.3) 
Using arel (4.0.0.beta1) 
Using activerecord (4.0.0.beta1) 
Using bundler (1.3.0) 
Installing coffee-script-source (1.5.0) 
Installing execjs (1.4.0) 
Installing coffee-script (2.2.0) 
Using json (1.7.7) 
Using rdoc (3.12.2) 
Using thor (0.17.0) 
Using railties (4.0.0.beta1) 
Installing coffee-rails (4.0.0.beta1) 
Using hike (1.2.1) 
Installing jbuilder (1.0.2) 
Installing jquery-rails (2.2.1) 
Using tilt (1.3.4) 
Using sprockets (2.9.0) 
Using sprockets-rails (2.0.0.rc3) 
Using rails (4.0.0.beta1) 
Installing sass (3.2.6) 
Installing sass-rails (4.0.0.beta1) 
Installing sqlite3 (1.3.7) 
Installing turbolinks (1.0.0) 
Installing uglifier (1.3.0) 
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.
```

生成された`Gemfile`は以下の様な感じだった。

```ruby:Gemfile
source 'https://rubygems.org'                                                                       

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.0.0.beta1'

gem 'sqlite3'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 4.0.0.beta1'
  gem 'coffee-rails', '~> 4.0.0.beta1'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer', platforms: :ruby

  gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails'

# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'

# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 1.0.1'

# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'

# Use unicorn as the app server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano', group: :development

# To use debugger
# gem 'debugger' 
```

以上。あとで`rails g scaffold`とかしてみよう。