#+TITLE: Ruby contribution layer for Spacemacs

[[file:img/ruby.gif]]

* Table of Contents                                                   :TOC@4:
 - [[#description][Description]]
 - [[#install][Install]]
     - [[#prerequisites][Prerequisites]]
     - [[#ruby-version-management][Ruby version management]]
     - [[#rails-support][Rails support]]
 - [[#key-bindings][Key bindings]]
     - [[#ruby-enh-ruby-mode-robe-inf-ruby][Ruby (enh-ruby-mode, robe, inf-ruby)]]
     - [[#ruby-test-mode][ruby-test-mode]]
     - [[#rails-projectile-rails][Rails (projectile-rails)]]
         - [[#code-navigation][Code Navigation]]
         - [[#refactoring][Refactoring]]
         - [[#run-commands][RUN commands]]
         - [[#ex-commands][Ex-commands]]

* Description

This layer aims at providing support for the Ruby language using
[[https://github.com/zenspider/enhanced-ruby-mode][enh-ruby-mode]] and [[https://github.com/dgutov/robe][robe-mode]].

* Install

To use this contribution add it to your =~/.spacemacs=

#+BEGIN_SRC emacs-lisp
  (setq-default dotspacemacs-configuration-layers '(ruby))
#+END_SRC

** Prerequisites

Some of the advanced features supported by this layer depend on external gems
that need to be installed in the context of your project (see below for guidance
based on your version manager):

*=pry= and =pry-doc= are required for *jump to definition* and *code documentation* (=robe-mode=)
*=ruby_parser= is required for *goto-step_definition* in =feature-mode=

You can install the gems in the context of your current project by
adding them to the =Gemfile=, e.g.:

#+BEGIN_SRC ruby
  gem 'pry'
#+END_SRC

or on the command line (please refer to your ruby version manager
specific documentation for details and caveats):

#+BEGIN_SRC sh
  $ gem install pry
#+END_SRC

** Ruby version management

This layer supports the use of [[https://rvm.io/][RVM]] and [[https://github.com/sstephenson/rbenv][Rbenv]].
To enable it, set the =ruby-version-manager= var in your =~/.spacemacs=:

#+BEGIN_SRC emacs-lisp
  (defun dotspacemacs/init ()
    (setq-default ruby-version-manager 'rbenv)
  )
#+END_SRC

Possible values are =rbenv= and =rvm=.

** Rails support

Rails support is available through [[https://github.com/asok/projectile-rails][projectile-rails]].
To enable it, set the =ruby-enable-ruby-on-rails-support= var in your
=~/.spacemacs=:

#+BEGIN_SRC emacs-lisp
  (defun dotspacemacs/init ()
    (setq-default ruby-enable-ruby-on-rails-support t)
  )
#+END_SRC

This will also add [[https://github.com/nex3/haml-mode][haml-mode]] (for templates written in [[http://haml.info][haml language]] and
[[https://github.com/michaelklishin/cucumber.el][feature-mode]] for [[http://cukes.info][Cucumber]] support.

* Key bindings

** Ruby (enh-ruby-mode, robe, inf-ruby)

| Key binding | Description                                 |
|-------------+---------------------------------------------|
| ~SPC m g g~ | go to definition (robe-jump)                |
| ~SPC m h d~ | go to Documentation                         |
| ~SPC m s f~ | send function definition                    |
| ~SPC m s F~ | send function definition and switch to REPL |
| ~SPC m s i~ | start REPL                                  |
| ~SPC m s r~ | send region                                 |
| ~SPC m s R~ | send region and switch to REPL              |
| ~SPC m s s~ | switch to REPL                              |

** ruby-test-mode

ruby-test-mode comes bundled with spacemacs, but this contribution adds
a couple of useful keybindings:

| Key binding | Description         |
|-------------+---------------------|
| ~SPC m t b~ | run test file       |
| ~SPC m t t~ | run test at pointer |

** Rails (projectile-rails)

*** Code Navigation

| Key binding   | Description                                                     |
|---------------+-----------------------------------------------------------------|
| ~SPC m r f a~ | find localization file                                          |
| ~SPC m r f c~ | find controller                                                 |
| ~SPC m r f e~ | find environment file                                           |
| ~SPC m r f f~ | find feature                                                    |
| ~SPC m r f h~ | find helper                                                     |
| ~SPC m r f i~ | find initializer                                                |
| ~SPC m r f j~ | find javascript file                                            |
| ~SPC m r f l~ | find library                                                    |
| ~SPC m r f m~ | find model                                                      |
| ~SPC m r f n~ | find migration                                                  |
| ~SPC m r f o~ | find log                                                        |
| ~SPC m r f p~ | find spec file                                                  |
| ~SPC m r f r~ | find rake task                                                  |
| ~SPC m r f s~ | find stylesheet file                                            |
| ~SPC m r f t~ | find test                                                       |
| ~SPC m r f u~ | find fixture                                                    |
| ~SPC m r f v~ | find view                                                       |
| ~SPC m r f y~ | find layout                                                     |
| ~SPC m r f @~ | find mailer                                                     |
| ~SPC m r g c~ | go to current controller                                        |
| ~SPC m r g d~ | go to DB schema                                                 |
| ~SPC m r g e~ | go to DB seeds                                                  |
| ~SPC m r g h~ | go to current helper                                            |
| ~SPC m r g j~ | go to current javascript                                        |
| ~SPC m r g g~ | go to Gemfile                                                   |
| ~SPC m r g m~ | go to current model                                             |
| ~SPC m r g n~ | go to current migration                                         |
| ~SPC m r g p~ | go to current spec                                              |
| ~SPC m r g r~ | go to routes                                                    |
| ~SPC m r g s~ | go to current stylesheet                                        |
| ~SPC m r g t~ | go to current test                                              |
| ~SPC m r g u~ | go to current fixture                                           |
| ~SPC m r g v~ | go to current view                                              |
| ~SPC m r g z~ | go to spec helper                                               |
| ~SPC m r g .~ | go to file at point (faster but less powerful than ~SPC m g g~) |

*** Refactoring

| Key binding   | Description                 |
|---------------+-----------------------------|
| ~SPC m r R x~ | extract region into partial |

*** RUN commands

| Key binding   | Description          |
|---------------+----------------------|
| ~SPC m r c c~ | run rails generator  |
| ~SPC m r i~   | start rails console  |
| ~SPC m r s r~ | reload Rails project |
| ~SPC m r r :~ | run rake task        |
| ~SPC m r x s~ | start rails server   |

*** Ex-commands

| Key binding | Description                             |
|-------------+-----------------------------------------|
| ~:A~        | Switch between implementation and tests |