diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..9c62a5d
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,178 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2019-03-26 12:32:08 -0300 using RuboCop version 0.66.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyleAlignWith, AutoCorrect, Severity.
+# SupportedStylesAlignWith: keyword, variable, start_of_line
+Layout/EndAlignment:
+  Exclude:
+    - 'app/models/post/image_uploader.rb'
+
+# Offense count: 1
+# Configuration parameters: AllowSafeAssignment.
+Lint/AssignmentInCondition:
+  Exclude:
+    - 'app/controllers/invitadxs_controller.rb'
+
+# Offense count: 4
+Lint/DuplicateMethods:
+  Exclude:
+    - 'app/models/post.rb'
+    - 'app/models/site.rb'
+
+# Offense count: 1
+Lint/HandleExceptions:
+  Exclude:
+    - 'app/controllers/posts_controller.rb'
+
+# Offense count: 1
+Lint/NonLocalExitFromIterator:
+  Exclude:
+    - 'app/models/invitadx.rb'
+
+# Offense count: 1
+Lint/ShadowingOuterLocalVariable:
+  Exclude:
+    - 'app/models/post.rb'
+
+# Offense count: 3
+Lint/UnderscorePrefixedVariableName:
+  Exclude:
+    - 'app/models/post.rb'
+    - 'app/models/post/template_field.rb'
+    - 'app/models/site.rb'
+
+# Offense count: 2
+Lint/UselessAssignment:
+  Exclude:
+    - 'app/models/invitadx.rb'
+    - 'app/models/site.rb'
+
+# Offense count: 19
+Metrics/AbcSize:
+  Max: 58
+
+# Offense count: 3
+# Configuration parameters: CountComments, ExcludedMethods.
+# ExcludedMethods: refine
+Metrics/BlockLength:
+  Max: 31
+
+# Offense count: 3
+# Configuration parameters: CountComments.
+Metrics/ClassLength:
+  Max: 379
+
+# Offense count: 6
+Metrics/CyclomaticComplexity:
+  Max: 18
+
+# Offense count: 15
+# Configuration parameters: CountComments, ExcludedMethods.
+Metrics/MethodLength:
+  Max: 34
+
+# Offense count: 5
+Metrics/PerceivedComplexity:
+  Max: 20
+
+# Offense count: 1
+# Configuration parameters: EnforcedStyleForLeadingUnderscores.
+# SupportedStylesForLeadingUnderscores: disallowed, required, optional
+Naming/MemoizedInstanceVariableName:
+  Exclude:
+    - 'app/models/post/image_uploader.rb'
+
+# Offense count: 1
+# Configuration parameters: NamePrefix, NamePrefixBlacklist, NameWhitelist, MethodDefinitionMacros.
+# NamePrefix: is_, has_, have_
+# NamePrefixBlacklist: is_, has_, have_
+# NameWhitelist: is_a?
+# MethodDefinitionMacros: define_method, define_singleton_method
+Naming/PredicateName:
+  Exclude:
+    - 'spec/**/*'
+    - 'app/models/post.rb'
+
+# Offense count: 4
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect.
+Performance/TimesMap:
+  Exclude:
+    - 'app/models/site.rb'
+    - 'test/models/site_test.rb'
+
+# Offense count: 102
+# Configuration parameters: AllowedChars.
+Style/AsciiComments:
+  Exclude:
+    - 'app/controllers/application_controller.rb'
+    - 'app/controllers/i18n_controller.rb'
+    - 'app/controllers/posts_controller.rb'
+    - 'app/controllers/sites_controller.rb'
+    - 'app/models/invitadx.rb'
+    - 'app/models/jekyll_i18n.rb'
+    - 'app/models/post.rb'
+    - 'app/models/post/image_uploader.rb'
+    - 'app/models/post/template_field.rb'
+    - 'app/models/site.rb'
+    - 'app/models/usuaria.rb'
+    - 'app/policies/post_policy.rb'
+    - 'config/routes.rb'
+    - 'lib/warden/imap.rb'
+
+# Offense count: 4
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect, EnforcedStyle.
+# SupportedStyles: nested, compact
+Style/ClassAndModuleChildren:
+  Exclude:
+    - 'app/models/post/image_uploader.rb'
+    - 'config/initializers/commonmarker.rb'
+    - 'config/initializers/warden.rb'
+    - 'test/test_helper.rb'
+
+# Offense count: 25
+Style/Documentation:
+  Enabled: false
+
+# Offense count: 5
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Exclude:
+    - 'app/controllers/posts_controller.rb'
+    - 'app/models/invitadx.rb'
+    - 'app/models/post.rb'
+    - 'lib/warden/email_and_password.rb'
+
+# Offense count: 7
+# Cop supports --auto-correct.
+Style/IfUnlessModifier:
+  Exclude:
+    - 'app/models/invitadx.rb'
+    - 'app/models/jekyll_i18n.rb'
+    - 'app/models/post.rb'
+    - 'bin/bundle'
+
+# Offense count: 2
+Style/MixinUsage:
+  Exclude:
+    - 'bin/setup'
+    - 'bin/update'
+
+# Offense count: 1
+Style/OptionalArguments:
+  Exclude:
+    - 'app/models/site.rb'
+
+# Offense count: 66
+# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
+# URISchemes: http, https
+Metrics/LineLength:
+  Max: 190
diff --git a/Capfile b/Capfile
index 529ada8..5abc2d8 100644
--- a/Capfile
+++ b/Capfile
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 # Load DSL and Setup Up Stages
 require 'capistrano/setup'
 
diff --git a/Gemfile b/Gemfile
index df03003..cf2df23 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 git_source(:github) do |repo_name|
-  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
+  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?('/')
   "https://github.com/#{repo_name}.git"
 end
 
@@ -30,21 +32,21 @@ gem 'bcrypt', '~> 3.1.7'
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
 
+gem 'bootstrap', '~> 4.0.0'
+gem 'carrierwave'
+gem 'carrierwave-bombshelter'
+gem 'carrierwave-i18n'
 gem 'commonmarker'
 gem 'email_address'
-gem 'rails_warden'
+gem 'exception_notification'
+gem 'font-awesome-rails'
 gem 'haml-rails'
-gem 'bootstrap', '~> 4.0.0'
 gem 'jekyll'
 gem 'jquery-rails'
-gem 'font-awesome-rails'
-gem 'exception_notification'
-gem 'whenever', require: false
-gem 'carrierwave'
-gem 'carrierwave-i18n'
 gem 'mini_magick'
-gem 'carrierwave-bombshelter'
 gem 'pundit'
+gem 'rails_warden'
+gem 'whenever', require: false
 
 group :development, :test do
   gem 'pry'
@@ -55,17 +57,18 @@ end
 
 group :development do
   # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
-  gem 'web-console', '>= 3.3.0'
   gem 'listen', '>= 3.0.5', '< 3.2'
+  gem 'web-console', '>= 3.3.0'
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
-  gem 'spring'
-  gem 'spring-watcher-listen', '~> 2.0.0'
   gem 'bcrypt_pbkdf'
   gem 'capistrano'
   gem 'capistrano-bundler'
   gem 'capistrano-passenger'
   gem 'capistrano-rails'
   gem 'capistrano-rbenv'
-  gem 'rbnacl', '< 5.0'
   gem 'letter_opener'
+  gem 'rbnacl', '< 5.0'
+  gem 'rubocop'
+  gem 'spring'
+  gem 'spring-watcher-listen', '~> 2.0.0'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index d702de3..e523f24 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,6 +43,7 @@ GEM
     airbrussh (1.3.1)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (8.0.0)
+    ast (2.4.0)
     autoprefixer-rails (9.5.0)
       execjs
     bcrypt (3.1.12)
@@ -134,6 +135,7 @@ GEM
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
+    jaro_winkler (1.5.2)
     jbuilder (2.8.0)
       activesupport (>= 4.2.0)
       multi_json (>= 1.2)
@@ -190,12 +192,16 @@ GEM
     nio4r (2.3.1)
     nokogiri (1.10.2)
       mini_portile2 (~> 2.4.0)
+    parallel (1.15.0)
+    parser (2.6.2.0)
+      ast (~> 2.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     popper_js (1.14.5)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
+    psych (3.1.0)
     public_suffix (3.0.3)
     puma (3.12.1)
     pundit (2.0.1)
@@ -228,6 +234,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
+    rainbow (3.0.0)
     rake (12.3.2)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
@@ -235,8 +242,17 @@ GEM
     rbnacl (4.0.2)
       ffi
     rouge (3.3.0)
+    rubocop (0.66.0)
+      jaro_winkler (~> 1.5.1)
+      parallel (~> 1.10)
+      parser (>= 2.5, != 2.5.1.1)
+      psych (>= 3.1.0)
+      rainbow (>= 2.2.2, < 4.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 1.6)
     ruby-enum (0.7.2)
       i18n
+    ruby-progressbar (1.10.0)
     ruby_dep (1.5.0)
     ruby_parser (3.13.0)
       sexp_processor (~> 4.9)
@@ -289,6 +305,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.5)
+    unicode-display_width (1.5.0)
     warden (1.2.8)
       rack (>= 2.0.6)
     web-console (3.7.0)
@@ -338,6 +355,7 @@ DEPENDENCIES
   rails (~> 5.1.4)
   rails_warden
   rbnacl (< 5.0)
+  rubocop
   sass-rails (~> 5.0)
   selenium-webdriver
   spring
diff --git a/Rakefile b/Rakefile
index e85f913..488c551 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index fabd520..804c519 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Forma de ingreso a Sutty
 class ApplicationController < ActionController::Base
   protect_from_forgery with: :exception
@@ -9,8 +11,7 @@ class ApplicationController < ActionController::Base
     redirect_to sites_path
   end
 
-  def markdown
-  end
+  def markdown; end
 
   private
 
diff --git a/app/controllers/i18n_controller.rb b/app/controllers/i18n_controller.rb
index a8a63fa..bb96044 100644
--- a/app/controllers/i18n_controller.rb
+++ b/app/controllers/i18n_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class I18nController < ApplicationController
   include Pundit
   before_action :authenticate!
@@ -15,7 +17,7 @@ class I18nController < ApplicationController
     @lang_from = params.fetch(:from, I18n.locale.to_s)
     @lang_to = params.fetch(:to, @lang_from)
     @options = I18n.available_locales.map do |lang|
-      [ t("i18n.#{lang.to_s}"), lang.to_s ]
+      [t("i18n.#{lang}"), lang.to_s]
     end
   end
 
diff --git a/app/controllers/invitadxs_controller.rb b/app/controllers/invitadxs_controller.rb
index 19d0e33..d967c43 100644
--- a/app/controllers/invitadxs_controller.rb
+++ b/app/controllers/invitadxs_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class InvitadxsController < ApplicationController
   include Pundit
 
@@ -53,6 +55,6 @@ class InvitadxsController < ApplicationController
 
   def invitadx_params
     params.require(:invitadx).permit(:email, :password,
-      :password_confirmation, :acepta_politicas_de_privacidad)
+                                     :password_confirmation, :acepta_politicas_de_privacidad)
   end
 end
diff --git a/app/controllers/login_controller.rb b/app/controllers/login_controller.rb
index 6bae992..da71247 100644
--- a/app/controllers/login_controller.rb
+++ b/app/controllers/login_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class LoginController < ApplicationController
   protect_from_forgery with: :exception
 
@@ -15,7 +17,7 @@ class LoginController < ApplicationController
   def create
     authenticate
     session[:lang] = params[:lang]
-    referer = request.referer unless /\/login/ =~ request.referer
+    referer = request.referer unless %r{/login} =~ request.referer
     referer = params[:referer] if params[:referer].present?
 
     if authenticated?
diff --git a/app/controllers/posts_controller.rb b/app/controllers/posts_controller.rb
index e8611ab..2b9ad02 100644
--- a/app/controllers/posts_controller.rb
+++ b/app/controllers/posts_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostsController < ApplicationController
   include Pundit
   before_action :authenticate!
@@ -32,9 +34,9 @@ class PostsController < ApplicationController
     @lang = find_lang(@site)
     @template = find_template(@site)
     @post = Post.new(site: @site,
-      front_matter: { date: Time.now },
-      lang: @lang,
-      template: @template)
+                     front_matter: { date: Time.now },
+                     lang: @lang,
+                     template: @template)
   end
 
   def create
@@ -47,17 +49,17 @@ class PostsController < ApplicationController
 
     # El post se guarda como incompleto si se envió con "guardar para
     # después"
-    @post.update_attributes({incomplete: params[:commit_incomplete].present?})
+    @post.update_attributes(incomplete: params[:commit_incomplete].present?)
 
     #  Las usuarias pueden especificar una autora, de la contrario por
     #  defecto es la usuaria actual
     if current_user.is_a? Usuaria
-      @post.update_attributes({author: params[:post][:author]})
+      @post.update_attributes(author: params[:post][:author])
     else
       # Todo lo que crean lxs invitadxs es borrador
-      @post.update_attributes({draft: true})
+      @post.update_attributes(draft: true)
     end
-    @post.update_attributes({author: current_user.username}) unless @post.author
+    @post.update_attributes(author: current_user.username) unless @post.author
 
     if @post.save
       flash[:success] = @site.config.dig('thanks')
@@ -87,11 +89,11 @@ class PostsController < ApplicationController
 
     # Solo las usuarias pueden modificar la autoría
     if current_user.is_a? Usuaria
-      @post.update_attributes({author: params[:post][:author]}) if params[:post][:author].present?
-      @post.update_attributes({draft: false})
+      @post.update_attributes(author: params[:post][:author]) if params[:post][:author].present?
+      @post.update_attributes(draft: false)
     else
       # Todo lo que crean lxs invitadxs es borrador
-      @post.update_attributes({draft: true})
+      @post.update_attributes(draft: true)
     end
 
     if @post.save
@@ -114,11 +116,11 @@ class PostsController < ApplicationController
     obj.each do |key, value|
       if value.is_a?(ActionController::Parameters) || value.is_a?(Hash)
         # If any non-integer keys
-        if value.keys.find {|k, _| k =~ /\D/ }
+        if value.keys.find { |k, _| k =~ /\D/ }
           repair_nested_params(value)
         else
           obj[key] = value.values
-          obj[key].each {|h| repair_nested_params(h) }
+          obj[key].each { |h| repair_nested_params(h) }
         end
       end
     end
diff --git a/app/controllers/sites_controller.rb b/app/controllers/sites_controller.rb
index 100bf9e..f1cf8da 100644
--- a/app/controllers/sites_controller.rb
+++ b/app/controllers/sites_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Controlador de sitios
 class SitesController < ApplicationController
   include Pundit
@@ -25,7 +27,7 @@ class SitesController < ApplicationController
     file  = [params[:basename], params[:format]].join('.')
     path  = Pathname.new(File.join(@site.path, 'public', params[:type], file))
 
-    # TODO Verificar que no nos estén sacando archivos del sistema, como
+    # TODO: Verificar que no nos estén sacando archivos del sistema, como
     # /etc/passwd
     #
     # En sí el matcher de la ruta no admite .. así que estaríamos semi
@@ -50,10 +52,10 @@ class SitesController < ApplicationController
     @site = find_site
     authorize @site
 
-    # TODO eliminar ANSI
+    # TODO: eliminar ANSI
     render file: @site.build_log,
-      layout: false,
-      content_type: 'text/plain; charset=utf-8'
+           layout: false,
+           content_type: 'text/plain; charset=utf-8'
   end
 
   def reorder_posts
@@ -61,11 +63,11 @@ class SitesController < ApplicationController
     authorize @site
     lang = params.require(:posts).require(:lang)
 
-    if params[:posts][:force].present?
-      result = @site.reorder_collection! lang
-    else
-      result = @site.reorder_collection(lang, params.require(:posts).require(:order))
-    end
+    result = if params[:posts][:force].present?
+               @site.reorder_collection! lang
+             else
+               @site.reorder_collection(lang, params.require(:posts).require(:order))
+             end
 
     if result
       flash[:info] = I18n.t('info.posts.reorder')
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 40fcf4f..f8ca552 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationHelper
   # Devuelve el atributo name de un campo posiblemente anidado
   def field_name_for_post(names)
diff --git a/app/jobs/application_job.rb b/app/jobs/application_job.rb
index a009ace..d92ffdd 100644
--- a/app/jobs/application_job.rb
+++ b/app/jobs/application_job.rb
@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 class ApplicationJob < ActiveJob::Base
 end
diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index 286b223..d84cb6e 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationMailer < ActionMailer::Base
   default from: 'from@example.com'
   layout 'mailer'
diff --git a/app/mailers/invitadx_mailer.rb b/app/mailers/invitadx_mailer.rb
index ee94f5c..cfb80a5 100644
--- a/app/mailers/invitadx_mailer.rb
+++ b/app/mailers/invitadx_mailer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class InvitadxMailer < ApplicationMailer
   def confirmation_required
     @invitadx = params[:invitadx]
diff --git a/app/models/application_record.rb b/app/models/application_record.rb
index 10a4cba..71fbba5 100644
--- a/app/models/application_record.rb
+++ b/app/models/application_record.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
 end
diff --git a/app/models/invitadx.rb b/app/models/invitadx.rb
index 3d44063..c9e5393 100644
--- a/app/models/invitadx.rb
+++ b/app/models/invitadx.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Invitadx < ApplicationRecord
   has_secure_password
   validates_uniqueness_of :email
@@ -15,9 +17,10 @@ class Invitadx < ApplicationRecord
     File.join(Rails.root, '_invitadxs', email)
   end
 
-  # TODO convertir el Pathname en un helper
+  # TODO: convertir el Pathname en un helper
   def site_dirs
-    return [] unless Dir.exists? path
+    return [] unless Dir.exist? path
+
     Pathname.new(path).children.map(&:expand_path).map(&:to_s)
   end
 
@@ -32,7 +35,7 @@ class Invitadx < ApplicationRecord
   def acepto_politicas_de_privacidad
     unless acepta_politicas_de_privacidad?
       errors.add(:acepta_politicas_de_privacidad,
-        :no_acepta_politicas_de_privacidad)
+                 :no_acepta_politicas_de_privacidad)
     end
   end
 
@@ -47,11 +50,11 @@ class Invitadx < ApplicationRecord
       dir  = File.join(path, site.name)
       file = site.invitadxs_file
 
-      unless File.exists? dir
+      unless File.exist? dir
         FileUtils.ln_s File.join('..', '..', '_sites', site.name), dir
       end
 
-      if File.exists? file
+      if File.exist? file
         invitadxs = File.read(file).split("\n")
         invitadxs_orig = invitadxs.dup
         invitadxs << email unless invitadxs.include? email
@@ -78,7 +81,6 @@ class Invitadx < ApplicationRecord
         f.flush
         f.truncate(f.pos)
       end
-
     end
   end
 end
diff --git a/app/models/jekyll_i18n.rb b/app/models/jekyll_i18n.rb
index 8267825..d8d06a5 100644
--- a/app/models/jekyll_i18n.rb
+++ b/app/models/jekyll_i18n.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Esta clase se encarga de guardan los archivos YAML de idiomas
 #
 # TODO se podría convertir en una clase genérica de editor de YAML
@@ -45,7 +47,7 @@ class JekyllI18n
 
   # Obtiene la ruta a partir del sitio y el idioma
   def path
-    File.join(@site.path, '_data', "#{@lang.to_s}.yml")
+    File.join(@site.path, '_data', "#{@lang}.yml")
   end
 
   def exist?
@@ -79,6 +81,7 @@ class JekyllI18n
     end
 
     return true if r.zero?
+
     false
   end
 
diff --git a/app/models/post.rb b/app/models/post.rb
index fac446d..6971f8c 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'jekyll/utils'
 
 # Esta clase representa un post en un sitio jekyll e incluye métodos
@@ -16,7 +17,7 @@ require 'jekyll/utils'
 class Post
   attr_accessor :content, :front_matter
   attr_reader :post, :site, :errors, :old_post, :lang, :template,
-    :template_fields
+              :template_fields
 
   REJECT_FROM_DATA = %w[excerpt].freeze
   # datos que no tienen que terminar en el front matter
@@ -24,8 +25,8 @@ class Post
   # datos que no traemos del template
   REJECT_FROM_TEMPLATE = %w[draft categories layout title ext tags date slug post pre].freeze
   DEFAULT_PARAMS = [:title, :date, :content, :slug, :cover,
-      :layout, :permalink, :dir,
-      { lang: {} }, { tags: [] }, { categories: [] }]
+                    :layout, :permalink, :dir,
+                    { lang: {} }, { tags: [] }, { categories: [] }].freeze
 
   def inspect
     "#<Post @id=#{id} @site=#{site.name}>"
@@ -37,29 +38,29 @@ class Post
   def initialize(site:, post: nil, front_matter: {}, lang: nil, template: nil)
     unless site.is_a?(Site)
       raise ArgumentError,
-        I18n.t('errors.argument_error', argument: :site, class: Site)
+            I18n.t('errors.argument_error', argument: :site, class: Site)
     end
 
     unless post.nil? || post.is_a?(Jekyll::Document)
       raise ArgumentError,
-        I18n.t('errors.argument_error', argument: :post,
-          class: Jekyll::Document)
+            I18n.t('errors.argument_error', argument: :post,
+                                            class: Jekyll::Document)
     end
 
     @site = site
     @post = post
     @template = template
-    # los errores tienen que ser un hash para que 
+    # los errores tienen que ser un hash para que
     # ActiveModel pueda traer los errores normalmente
     @errors = {}
 
     # Si el sitio está traducido, trabajamos con la colección del
     # idioma, sino, con posts
-    if @site.i18n?
-      @collection = @lang = lang || I18n.locale.to_s
-    else
-      @collection = 'posts'
-    end
+    @collection = if @site.i18n?
+                    @lang = lang || I18n.locale.to_s
+                  else
+                    'posts'
+                  end
 
     # sincronizar los datos del document
     if new?
@@ -115,6 +116,7 @@ class Post
 
     slugs.map do |lang, id|
       next if lang == @lang
+
       @site.posts_for(lang).find do |p|
         p.id == id
       end
@@ -141,7 +143,7 @@ class Post
     add_post_to_site!
     true
   end
-  alias :save! :save
+  alias save! save
 
   def title
     get_front_matter 'title'
@@ -166,7 +168,7 @@ class Post
   def categories
     get_front_matter('categories') || []
   end
-  alias :category :categories
+  alias category categories
 
   # Devuelve la ruta del post, si se cambió alguno de los datos,
   # generamos una ruta nueva para tener siempre la ruta actualizada.
@@ -178,13 +180,13 @@ class Post
     end
   end
 
-  # TODO los slugs se pueden repetir, el identificador real sería
+  # TODO: los slugs se pueden repetir, el identificador real sería
   # fecha+slug, pero se ve feo en las urls?
   def id
     get_front_matter 'slug'
   end
-  alias :slug :id
-  alias :to_s :id
+  alias slug id
+  alias to_s id
 
   def basename_changed?
     @post.try(:basename) != basename_from_front_matter
@@ -208,7 +210,7 @@ class Post
 
   def has_field?(field)
     if template
-      template.fetch_front_matter("has_#{field.to_s}", true)
+      template.fetch_front_matter("has_#{field}", true)
     else
       true
     end
@@ -225,7 +227,7 @@ class Post
     # convertir los hashes en arrays si los campos son anidados
     # usamos to_hash por todos lados porque sino son
     # HashWithIndifferentAccess
-    _attrs = attrs.to_hash.map do |k,v|
+    _attrs = attrs.to_hash.map do |k, v|
       t = template_fields.find { |t| t.key == k }
       if t
         # Subir la imagen!
@@ -257,7 +259,7 @@ class Post
       else
         { k => v }
       end
-    end.reduce(Hash.new, :merge).stringify_keys
+    end.reduce({}, :merge).stringify_keys
 
     # el cuerpo se maneja por separado
     @content = _attrs.delete('content') if _attrs.key? 'content'
@@ -275,6 +277,7 @@ class Post
     # XXX este es un principio de validación de plantillas, aunque no es
     # recursivo
     return if fetch_front_matter('incomplete', false)
+
     template_fields.each do |tf|
       errors = [get_front_matter(tf.key)].flatten.compact
       if tf.image? && errors.map { |i| File.exist?(File.join(site.path, i)) }.none?
@@ -299,6 +302,7 @@ class Post
   def url?(name)
     path = get_front_matter(name)
     return false unless path.is_a?(String) || path.is_a?(Array)
+
     # El primer valor es '' porque la URL empieza con /
     [path].flatten.map do |p|
       p.split('/').second == 'public'
@@ -308,20 +312,20 @@ class Post
   def image?(name)
     return false unless url? name
 
-    # TODO no chequear por la extensión
-    %[gif jpg jpeg png].include? get_front_matter(name).gsub(/.*\./, '')
+    # TODO: no chequear por la extensión
+    %(gif jpg jpeg png).include? get_front_matter(name).gsub(/.*\./, '')
   end
 
   # Obtiene metadatos de forma recursiva
   # TODO devolver un valor por defecto en base al template?
   def get_front_matter(name)
-    if name.is_a? Array
-      # Convertir los indices numericos a integers
-      name = name.map { |i| i =~ /[0-9]+/ ? i.to_i : i }
-    else
-      # XXX retrocompatibilidad
-      name = name.to_s
-    end
+    name = if name.is_a? Array
+             # Convertir los indices numericos a integers
+             name.map { |i| /[0-9]+/.match?(i) ? i.to_i : i }
+           else
+             # XXX retrocompatibilidad
+             name.to_s
+           end
     @front_matter.dig(*name)
   end
 
@@ -341,9 +345,10 @@ class Post
     end
   end
 
-  # TODO convertir a hash para que sea más fácil buscar uno
+  # TODO: convertir a hash para que sea más fácil buscar uno
   def template_fields
     return [] unless template
+
     @template_fields ||= template.front_matter.map do |key, contents|
       next if REJECT_FROM_TEMPLATE.include? key
       next if key.start_with? 'has_'
@@ -355,9 +360,7 @@ class Post
   # devuelve las plantillas como strong params, primero los valores
   # simples, luego los arrays y al final los hashes
   def template_params
-    @template_params ||= (DEFAULT_PARAMS + template_fields.map do |k|
-      k.to_param
-    end).sort_by do |s|
+    @template_params ||= (DEFAULT_PARAMS + template_fields.map(&:to_param)).sort_by do |s|
       s.is_a?(Symbol) ? 0 : 1
     end
   end
@@ -375,7 +378,7 @@ class Post
     # entramos en una race condition
     return {} unless @template
 
-    ft = template_fields.map(&:to_front_matter).reduce(Hash.new, :merge)
+    ft = template_fields.map(&:to_front_matter).reduce({}, :merge)
     # Convertimos el slug en layout
     ft['layout'] = template.slug
 
@@ -430,7 +433,7 @@ class Post
   # Obtiene el nombre del archivo a partir de los datos que le
   # pasemos
   def basename_from_front_matter
-    ext  = get_front_matter('ext')  || '.markdown'
+    ext = get_front_matter('ext') || '.markdown'
 
     "#{date_as_string}-#{slug}#{ext}"
   end
@@ -485,7 +488,7 @@ class Post
   end
 
   def remove_empty_front_matter!
-    @front_matter.delete_if do |k,v|
+    @front_matter.delete_if do |_k, v|
       v.blank?
     end
   end
@@ -526,7 +529,7 @@ class Post
   # obtener el contenido por defecto si es que no lo enviamos
   # modificaciones, como en `update_translations!`
   def full_content
-    yaml = @front_matter.reject do |k,_|
+    yaml = @front_matter.reject do |k, _|
       REJECT_FROM_FRONT_MATTER.include? k
     end
 
@@ -534,12 +537,12 @@ class Post
   end
 
   def add_error(hash)
-    hash.each_pair do |k,i|
-      if @errors.key?(k)
-        @errors[k] = [@errors[k], i]
-      else
-        @errors[k] = i
-      end
+    hash.each_pair do |k, i|
+      @errors[k] = if @errors.key?(k)
+                     [@errors[k], i]
+                   else
+                     i
+                   end
     end
 
     @errors
@@ -557,18 +560,17 @@ class Post
 
   # XXX es necesario ahora que tenemos select2?
   def things_to_arrays!
-    [:tags,:categories].each do |c|
+    %i[tags categories].each do |c|
       thing = @front_matter.dig(c.to_s)
       next if thing.blank?
       next if thing.is_a? Array
+
       @front_matter[c.to_s] = thing.split(',').map(&:strip)
     end
   end
 
   def slugify_title!
-    if slug.blank?
-      @front_matter['slug'] = Jekyll::Utils.slugify(title)
-    end
+    @front_matter['slug'] = Jekyll::Utils.slugify(title) if slug.blank?
   end
 
   # Agregar al final de la cola si no especificamos un orden
@@ -585,20 +587,20 @@ class Post
   def create_glossary!
     return unless site.glossary?
 
-    [:tags,:categories].each do |i|
-      self.send(i).each do |c|
-        # TODO no hardcodear, hacer _configurable
+    %i[tags categories].each do |i|
+      send(i).each do |c|
+        # TODO: no hardcodear, hacer _configurable
         next if c == 'Glossary'
         next if site.posts.find do |p|
           p.title == c
         end
 
         glossary = Post.new(site: site, lang: lang)
-        glossary.update_attributes({
+        glossary.update_attributes(
           title: c,
           layout: 'glossary',
           categories: 'Glossary'
-        })
+        )
 
         glossary.save!
       end
diff --git a/app/models/post/image_uploader.rb b/app/models/post/image_uploader.rb
index 101b0fe..61837a6 100644
--- a/app/models/post/image_uploader.rb
+++ b/app/models/post/image_uploader.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Una clase que permite adjuntar imágenes a artículos
 class Post::ImageUploader < CarrierWave::Uploader::Base
   include CarrierWave::MiniMagick
@@ -9,7 +11,7 @@ class Post::ImageUploader < CarrierWave::Uploader::Base
 
   version :thumb do
     process :strip
-    process resize_to_fit: [200,200]
+    process resize_to_fit: [200, 200]
   end
 
   def strip
@@ -28,7 +30,7 @@ class Post::ImageUploader < CarrierWave::Uploader::Base
 
   # Solo aceptamos imágenes
   def content_type_whitelist
-    /\Aimage\//
+    %r{\Aimage/}
   end
 
   # Devuelve la ubicación del directorio dentro de Jekyll, para eso,
@@ -46,10 +48,10 @@ class Post::ImageUploader < CarrierWave::Uploader::Base
   # están repetidos.
   def filename
     current_filename = parent_version.try(:filename) || file.try(:filename)
-    @unique_filename ||= if /\A(thumb_)?[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\..*\Z/ =~ current_filename
-      current_filename
-    else
-      [SecureRandom.uuid, '.', file.extension].join
+    @unique_filename ||= if /\A(thumb_)?[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\..*\Z/.match?(current_filename)
+                           current_filename
+                         else
+                           [SecureRandom.uuid, '.', file.extension].join
     end
   end
 
diff --git a/app/models/post/template_field.rb b/app/models/post/template_field.rb
index 6e9475a..540f09b 100644
--- a/app/models/post/template_field.rb
+++ b/app/models/post/template_field.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Representa los distintos tipos de campos que pueden venir de una
 # plantilla compleja
 class Post
@@ -5,7 +7,7 @@ class Post
     attr_reader :post, :contents, :key
 
     STRING_VALUES = %w[string text url number email password date year
-      image video audio document].freeze
+                       image video audio document].freeze
 
     # Tipo de valores que son archivos
     FILE_TYPES = %w[image video audio document].freeze
@@ -27,50 +29,51 @@ class Post
 
     def max
       return 0 if simple?
+
       contents.fetch('max', 0)
     end
 
     def min
       return 0 if simple?
+
       contents.fetch('min', 0)
     end
 
-    # TODO volver elegante!
+    # TODO: volver elegante!
     def type
       return @type if @type
 
-      case
-      when image?
+      if image?
         @type = 'image'
-      when email?
+      elsif email?
         @type = 'email'
-      when url?
+      elsif url?
         @type = 'url'
-      when number?
+      elsif number?
         @type = 'number'
-      when password?
+      elsif password?
         @type = 'password'
-      when date?
+      elsif date?
         @type = 'date'
-      when year?
+      elsif year?
         @type = 'year'
-      when text_area?
+      elsif text_area?
         @type = 'text_area'
-      when check_box_group?
+      elsif check_box_group?
         @type = 'check_box_group'
-      when radio_group?
+      elsif radio_group?
         @type = 'radio_group'
-      when string?
+      elsif string?
         @type = 'text'
-      # TODO volver a hacer funcionar esto y ahorranos los multiple:
+      # TODO: volver a hacer funcionar esto y ahorranos los multiple:
       # false
-      when string? && contents.split('/', 2).count == 2
+      elsif string? && contents.split('/', 2).count == 2
         @type = 'select'
-      when nested?
+      elsif nested?
         @type = 'table'
-      when array?
+      elsif array?
         @type = 'select'
-      when boolean?
+      elsif boolean?
         @type = 'check_box'
       end
 
@@ -79,15 +82,14 @@ class Post
 
     # Devuelve los valores vacíos según el tipo
     def empty_value
-      case
-      when string?
+      if string?
         ''
-      when nested?
-      # TODO devolver las keys también
+      elsif nested?
+        # TODO: devolver las keys también
         {}
-      when array?
+      elsif array?
         []
-      when boolean?
+      elsif boolean?
         false
       end
     end
@@ -124,7 +126,7 @@ class Post
     def email?
       value == 'email' || value == 'mail'
     end
-    alias :mail? :email?
+    alias mail? email?
 
     def date?
       value == 'date'
@@ -192,7 +194,7 @@ class Post
       value.is_a? Array
     end
 
-    # TODO detectar cuando es complejo y tomar el valor de :multiple
+    # TODO: detectar cuando es complejo y tomar el valor de :multiple
     def multiple?
       # si la plantilla es simple, es multiple cuando tenemos un array
       return array? if simple?
@@ -211,6 +213,7 @@ class Post
       # Todos los valores simples son abiertos
       return true unless complex?
       return false unless array?
+
       # La cosa se complejiza cuando tenemos valores complejos
       #
       # Si tenemos una lista cerrada de valores, necesitamos saber si el
@@ -241,7 +244,7 @@ class Post
 
     def human
       h = key.humanize
-      h = h + ' *' if required?
+      h += ' *' if required?
 
       h
     end
@@ -260,21 +263,21 @@ class Post
       v = value
       v = value.first if array?
 
-      @nested_fields ||= v.map do |k,sv|
+      @nested_fields ||= v.map do |k, sv|
         Post::TemplateField.new post, k, sv
       end
     end
 
     # Obtiene los valores posibles para el campo de la plantilla
     def values
-      return 'false' if self.value == false
-      return 'true'  if self.value == true
+      return 'false' if value == false
+      return 'true'  if value == true
       # XXX por alguna razón `value` no refiere a value() :/
-      return '' if STRING_VALUES.include? self.value
+      return '' if STRING_VALUES.include? value
       # Las listas cerradas no necesitan mayor procesamiento
-      return self.value if array? && closed? && self.value.count > 1
+      return value if array? && closed? && value.count > 1
       # Y las vacías tampoco
-      return self.value if array? && self.value.empty?
+      return value if array? && value.empty?
       # Ahorrarnos el trabajo
       return @values if @values
 
@@ -301,7 +304,7 @@ class Post
         collection, attr, subattr = v.split('/', 3)
 
         if collection == 'site'
-          # TODO puede ser peligroso permitir acceder a cualquier
+          # TODO: puede ser peligroso permitir acceder a cualquier
           # atributo de site?  No estamos trayendo nada fuera de
           # lo normal
           post.site.send(attr.to_sym)
@@ -311,11 +314,11 @@ class Post
         # TODO volver recursivo!
         elsif subattr
           post.site.everything_of(attr, lang: collection)
-            .compact
-            .map { |sv| sv[subattr] }
-            .flatten
-            .compact
-            .uniq
+              .compact
+              .map { |sv| sv[subattr] }
+              .flatten
+              .compact
+              .uniq
         else
           post.site.everything_of(attr, lang: collection).compact
         end
@@ -331,7 +334,7 @@ class Post
         if _value.count == 1
           _value = [(_value.first + value).uniq]
         elsif _value.count == 2
-          _value = _value.each_with_index.map do |v,i|
+          _value = _value.each_with_index.map do |v, i|
             v + value.fetch(i, [])
           end
         end
diff --git a/app/models/site.rb b/app/models/site.rb
index a25cd03..93c6712 100644
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -1,7 +1,8 @@
+# frozen_string_literal: true
+
 # Un sitio es un directorio dentro del directorio de sitios de cada
 # Usuaria
 class Site
-
   attr_accessor :jekyll, :collections
   attr_reader   :path
 
@@ -71,8 +72,8 @@ class Site
   def name
     @name ||= File.basename(@jekyll.config['source'])
   end
-  alias :id   :name
-  alias :to_s :name
+  alias id   name
+  alias to_s name
 
   def name_with_i18n(lang)
     [name, lang].join('/')
@@ -108,9 +109,7 @@ class Site
     @jekyll.config
   end
 
-  def collections
-    @collections
-  end
+  attr_reader :collections
 
   def collections_names
     @jekyll.config['collections'].keys
@@ -132,6 +131,7 @@ class Site
   # Devuelve nil si la colección no existe
   def posts_for(collection)
     return unless collections_names.include? collection
+
     # Si pedimos 'posts' pero estamos en un sitio traducido, traemos el
     # idioma actual
     collection = default_lang if collection == 'posts' && i18n?
@@ -192,6 +192,7 @@ class Site
 
   def invitadxs
     return [] unless invitadxs?
+
     @invitadxs ||= File.read(invitadxs_file).split("\n").map do |i|
       Invitadx.find_by_email(i)
     end
@@ -208,7 +209,7 @@ class Site
   def defail
     FileUtils.rm failed_file if failed?
   end
-  alias :defail! :defail
+  alias defail! defail
 
   def build_log
     File.join(path, 'build.log')
@@ -225,13 +226,13 @@ class Site
   def enqueued?
     File.exist? queue_file
   end
-  alias :queued? :enqueued?
+  alias queued? enqueued?
 
   # El sitio se genera cuando se coloca en una cola de generación, para
   # que luego lo construya un cronjob
   def enqueue
     defail!
-    # TODO ya van tres métodos donde usamos esta idea, convertir en un
+    # TODO: ya van tres métodos donde usamos esta idea, convertir en un
     # helper o algo
     r = File.open(queue_file, File::RDWR | File::CREAT, 0o640) do |f|
       # Bloquear el archivo para que no sea accedido por otro
@@ -249,19 +250,17 @@ class Site
       f.truncate(f.pos)
     end
   end
-  alias :enqueue! :enqueue
+  alias enqueue! enqueue
 
   # Eliminar de la cola
   def dequeue
     FileUtils.rm(queue_file) if enqueued?
   end
-  alias :dequeue! :dequeue
+  alias dequeue! dequeue
 
   # Verifica si los posts están ordenados
   def ordered?(collection = 'posts')
-    posts_for(collection).map do |p|
-      p.order
-    end.all?
+    posts_for(collection).map(&:order).all?
   end
 
   # Reordena la colección usando la posición informada
@@ -293,10 +292,10 @@ class Site
 
   # Reordena la colección usando la posición actual de los artículos
   def reorder_collection!(collection = 'posts')
-    order = Hash[posts_for(collection).count.times.map { |i| [i.to_s,i.to_s] }]
+    order = Hash[posts_for(collection).count.times.map { |i| [i.to_s, i.to_s] }]
     reorder_collection collection, order
   end
-  alias :reorder_posts! :reorder_collection!
+  alias reorder_posts! reorder_collection!
 
   # Obtener una ruta disponible para Sutty
   def get_url_for_sutty(path)
@@ -336,9 +335,9 @@ class Site
     # Especificamos `safe` para no cargar los _plugins, que interfieren
     # entre sitios incluso
     config = ::Jekyll.configuration('source' => path,
-      'destination' => File.join(path, '_site'),
-      'safe' => true,
-      'watch' => false)
+                                    'destination' => File.join(path, '_site'),
+                                    'safe' => true,
+                                    'watch' => false)
 
     # No necesitamos cargar plugins en este momento
     %w[plugins gems theme].each do |unneeded|
@@ -348,10 +347,8 @@ class Site
     # Si estamos usando nuestro propio plugin de i18n, los posts están
     # en "colecciones"
     i18n = config.dig('i18n')
-    if i18n
-      i18n.each do |i|
-        config['collections'][i] = {}
-      end
+    i18n&.each do |i|
+      config['collections'][i] = {}
     end
 
     Jekyll::Site.new(config)
diff --git a/app/models/usuaria.rb b/app/models/usuaria.rb
index 68647fb..707c7b2 100644
--- a/app/models/usuaria.rb
+++ b/app/models/usuaria.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Un modelo para la usuaria que no se corresponde con una base de datos
 # porque vienen de IMAP
 #
diff --git a/app/policies/i18n_policy.rb b/app/policies/i18n_policy.rb
index 68b2949..899a3ec 100644
--- a/app/policies/i18n_policy.rb
+++ b/app/policies/i18n_policy.rb
@@ -1,6 +1,7 @@
-class I18nPolicy < SuttyPolicy
+# frozen_string_literal: true
 
-  def initialize(usuarix, i18n)
+class I18nPolicy < SuttyPolicy
+  def initialize(usuarix, _i18n)
     @usuarix = usuarix
   end
 
diff --git a/app/policies/invitadx_policy.rb b/app/policies/invitadx_policy.rb
index 402b201..6c1a5d9 100644
--- a/app/policies/invitadx_policy.rb
+++ b/app/policies/invitadx_policy.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class InvitadxPolicy
   attr_reader :usuarix, :model
 
diff --git a/app/policies/post_policy.rb b/app/policies/post_policy.rb
index f3aaba1..9af48ea 100644
--- a/app/policies/post_policy.rb
+++ b/app/policies/post_policy.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostPolicy < SuttyPolicy
   attr_reader :post
 
diff --git a/app/policies/site_policy.rb b/app/policies/site_policy.rb
index 3050f30..a243fa6 100644
--- a/app/policies/site_policy.rb
+++ b/app/policies/site_policy.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class SitePolicy < SuttyPolicy
   attr_reader :site
 
diff --git a/app/policies/sutty_policy.rb b/app/policies/sutty_policy.rb
index 4ca31a4..23d71d5 100644
--- a/app/policies/sutty_policy.rb
+++ b/app/policies/sutty_policy.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class SuttyPolicy
   attr_reader :usuarix
 
diff --git a/app/views/posts/_form.haml b/app/views/posts/_form.haml
index 5757999..dfac48d 100644
--- a/app/views/posts/_form.haml
+++ b/app/views/posts/_form.haml
@@ -117,7 +117,7 @@
   - @post.template_fields.each do |template|
     - next unless type = template.type
     - if template.title.present?
-      %h1= template.title
+      %h1{id: template.title.tr(' ', '_').titleize}= template.title
     - value = @post.new? ? template.values : @post.get_front_matter(template.key)
     .form-group
       = label_tag "post_#{template}", id: template do
diff --git a/bin/bundle b/bin/bundle
index 524dfd3..6965387 100755
--- a/bin/bundle
+++ b/bin/bundle
@@ -8,22 +8,23 @@
 # this file is here to facilitate running it.
 #
 
-require "rubygems"
+require 'rubygems'
 
 m = Module.new do
-    module_function
+  module_function
 
   def invoked_as_script?
-    File.expand_path($0) == File.expand_path(__FILE__)
+    File.expand_path($PROGRAM_NAME) == File.expand_path(__FILE__)
   end
 
   def env_var_version
-    ENV["BUNDLER_VERSION"]
+    ENV['BUNDLER_VERSION']
   end
 
   def cli_arg_version
     return unless invoked_as_script? # don't want to hijack other binstubs
-    return unless "update".start_with?(ARGV.first || " ") # must be running `bundle update`
+    return unless 'update'.start_with?(ARGV.first || ' ') # must be running `bundle update`
+
     bundler_version = nil
     update_index = nil
     ARGV.each_with_index do |a, i|
@@ -31,23 +32,24 @@ m = Module.new do
         bundler_version = a
       end
       next unless a =~ /\A--bundler(?:[= ](#{Gem::Version::VERSION_PATTERN}))?\z/
-      bundler_version = $1 || ">= 0.a"
+
+      bundler_version = Regexp.last_match(1) || '>= 0.a'
       update_index = i
     end
     bundler_version
   end
 
   def gemfile
-    gemfile = ENV["BUNDLE_GEMFILE"]
+    gemfile = ENV['BUNDLE_GEMFILE']
     return gemfile if gemfile && !gemfile.empty?
 
-    File.expand_path("../../Gemfile", __FILE__)
+    File.expand_path('../Gemfile', __dir__)
   end
 
   def lockfile
     lockfile =
       case File.basename(gemfile)
-      when "gems.rb" then gemfile.sub(/\.rb$/, gemfile)
+      when 'gems.rb' then gemfile.sub(/\.rb$/, gemfile)
       else "#{gemfile}.lock"
       end
     File.expand_path(lockfile)
@@ -55,8 +57,10 @@ m = Module.new do
 
   def lockfile_version
     return unless File.file?(lockfile)
+
     lockfile_contents = File.read(lockfile)
     return unless lockfile_contents =~ /\n\nBUNDLED WITH\n\s{2,}(#{Gem::Version::VERSION_PATTERN})\n/
+
     Regexp.last_match(1)
   end
 
@@ -68,24 +72,26 @@ m = Module.new do
   end
 
   def load_bundler!
-    ENV["BUNDLE_GEMFILE"] ||= gemfile
+    ENV['BUNDLE_GEMFILE'] ||= gemfile
 
     # must dup string for RG < 1.8 compatibility
     activate_bundler(bundler_version.dup)
   end
 
   def activate_bundler(bundler_version)
-    if Gem::Version.correct?(bundler_version) && Gem::Version.new(bundler_version).release < Gem::Version.new("2.0")
-      bundler_version = "< 2"
+    if Gem::Version.correct?(bundler_version) && Gem::Version.new(bundler_version).release < Gem::Version.new('2.0')
+      bundler_version = '< 2'
     end
     gem_error = activation_error_handling do
-      gem "bundler", bundler_version
+      gem 'bundler', bundler_version
     end
     return if gem_error.nil?
+
     require_error = activation_error_handling do
-      require "bundler/version"
+      require 'bundler/version'
     end
     return if require_error.nil? && Gem::Requirement.new(bundler_version).satisfied_by?(Gem::Version.new(Bundler::VERSION))
+
     warn "Activating bundler (#{bundler_version}) failed:\n#{gem_error.message}\n\nTo install the version of bundler this project requires, run `gem install bundler -v '#{bundler_version}'`"
     exit 42
   end
@@ -100,6 +106,4 @@ end
 
 m.load_bundler!
 
-if m.invoked_as_script?
-  load Gem.bin_path("bundler", "bundle")
-end
+load Gem.bin_path('bundler', 'bundle') if m.invoked_as_script?
diff --git a/bin/cap b/bin/cap
index db774dc..2410b2c 100755
--- a/bin/cap
+++ b/bin/cap
@@ -8,14 +8,14 @@
 # this file is here to facilitate running it.
 #
 
-require "pathname"
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
-  Pathname.new(__FILE__).realpath)
+require 'pathname'
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile',
+                                           Pathname.new(__FILE__).realpath)
 
-bundle_binstub = File.expand_path("../bundle", __FILE__)
+bundle_binstub = File.expand_path('bundle', __dir__)
 
 if File.file?(bundle_binstub)
-  if File.read(bundle_binstub, 300) =~ /This file was generated by Bundler/
+  if /This file was generated by Bundler/.match?(File.read(bundle_binstub, 300))
     load(bundle_binstub)
   else
     abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
@@ -23,7 +23,7 @@ Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this
   end
 end
 
-require "rubygems"
-require "bundler/setup"
+require 'rubygems'
+require 'bundler/setup'
 
-load Gem.bin_path("capistrano", "cap")
+load Gem.bin_path('capistrano', 'cap')
diff --git a/bin/capify b/bin/capify
index 6892100..eebf2d2 100755
--- a/bin/capify
+++ b/bin/capify
@@ -8,14 +8,14 @@
 # this file is here to facilitate running it.
 #
 
-require "pathname"
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
-  Pathname.new(__FILE__).realpath)
+require 'pathname'
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile',
+                                           Pathname.new(__FILE__).realpath)
 
-bundle_binstub = File.expand_path("../bundle", __FILE__)
+bundle_binstub = File.expand_path('bundle', __dir__)
 
 if File.file?(bundle_binstub)
-  if File.read(bundle_binstub, 300) =~ /This file was generated by Bundler/
+  if /This file was generated by Bundler/.match?(File.read(bundle_binstub, 300))
     load(bundle_binstub)
   else
     abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
@@ -23,7 +23,7 @@ Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this
   end
 end
 
-require "rubygems"
-require "bundler/setup"
+require 'rubygems'
+require 'bundler/setup'
 
-load Gem.bin_path("capistrano", "capify")
+load Gem.bin_path('capistrano', 'capify')
diff --git a/bin/rails b/bin/rails
index 5badb2f..3504c3f 100755
--- a/bin/rails
+++ b/bin/rails
@@ -1,6 +1,8 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 begin
-  load File.expand_path('../spring', __FILE__)
+  load File.expand_path('spring', __dir__)
 rescue LoadError => e
   raise unless e.message.include?('spring')
 end
diff --git a/bin/rake b/bin/rake
index d87d5f5..1fe6cf0 100755
--- a/bin/rake
+++ b/bin/rake
@@ -1,6 +1,8 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 begin
-  load File.expand_path('../spring', __FILE__)
+  load File.expand_path('spring', __dir__)
 rescue LoadError => e
   raise unless e.message.include?('spring')
 end
diff --git a/bin/setup b/bin/setup
index 78c4e86..3b7333e 100755
--- a/bin/setup
+++ b/bin/setup
@@ -1,10 +1,12 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 require 'pathname'
 require 'fileutils'
 include FileUtils
 
 # path to your application root.
-APP_ROOT = Pathname.new File.expand_path('../../', __FILE__)
+APP_ROOT = Pathname.new File.expand_path('..', __dir__)
 
 def system!(*args)
   system(*args) || abort("\n== Command #{args} failed ==")
@@ -21,7 +23,6 @@ chdir APP_ROOT do
   # Install JavaScript dependencies if using Yarn
   # system('bin/yarn')
 
-
   # puts "\n== Copying sample files =="
   # unless File.exist?('config/database.yml')
   #   cp 'config/database.yml.sample', 'config/database.yml'
diff --git a/bin/spring b/bin/spring
index fb2ec2e..9bd27ec 100755
--- a/bin/spring
+++ b/bin/spring
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 # This file loads spring without using Bundler, in order to be fast.
 # It gets overwritten when you run the `spring binstub` command.
@@ -8,7 +9,7 @@ unless defined?(Spring)
   require 'bundler'
 
   lockfile = Bundler::LockfileParser.new(Bundler.default_lockfile.read)
-  spring = lockfile.specs.detect { |spec| spec.name == "spring" }
+  spring = lockfile.specs.detect { |spec| spec.name == 'spring' }
   if spring
     Gem.use_paths Gem.dir, Bundler.bundle_path.to_s, *Gem.path
     gem 'spring', spring.version
diff --git a/bin/update b/bin/update
index a8e4462..1d6aa6a 100755
--- a/bin/update
+++ b/bin/update
@@ -1,10 +1,12 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 require 'pathname'
 require 'fileutils'
 include FileUtils
 
 # path to your application root.
-APP_ROOT = Pathname.new File.expand_path('../../', __FILE__)
+APP_ROOT = Pathname.new File.expand_path('..', __dir__)
 
 def system!(*args)
   system(*args) || abort("\n== Command #{args} failed ==")
diff --git a/bin/whenever b/bin/whenever
index 7350453..a29ab70 100755
--- a/bin/whenever
+++ b/bin/whenever
@@ -8,14 +8,14 @@
 # this file is here to facilitate running it.
 #
 
-bundle_binstub = File.expand_path("../bundle", __FILE__)
+bundle_binstub = File.expand_path('bundle', __dir__)
 load(bundle_binstub) if File.file?(bundle_binstub)
 
-require "pathname"
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
-  Pathname.new(__FILE__).realpath)
+require 'pathname'
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile',
+                                           Pathname.new(__FILE__).realpath)
 
-require "rubygems"
-require "bundler/setup"
+require 'rubygems'
+require 'bundler/setup'
 
-load Gem.bin_path("whenever", "whenever")
+load Gem.bin_path('whenever', 'whenever')
diff --git a/bin/wheneverize b/bin/wheneverize
index de812b6..8e7491a 100755
--- a/bin/wheneverize
+++ b/bin/wheneverize
@@ -8,14 +8,14 @@
 # this file is here to facilitate running it.
 #
 
-bundle_binstub = File.expand_path("../bundle", __FILE__)
+bundle_binstub = File.expand_path('bundle', __dir__)
 load(bundle_binstub) if File.file?(bundle_binstub)
 
-require "pathname"
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
-  Pathname.new(__FILE__).realpath)
+require 'pathname'
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile',
+                                           Pathname.new(__FILE__).realpath)
 
-require "rubygems"
-require "bundler/setup"
+require 'rubygems'
+require 'bundler/setup'
 
-load Gem.bin_path("whenever", "wheneverize")
+load Gem.bin_path('whenever', 'wheneverize')
diff --git a/bin/yarn b/bin/yarn
index c2bacef..80b670d 100755
--- a/bin/yarn
+++ b/bin/yarn
@@ -1,11 +1,11 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 VENDOR_PATH = File.expand_path('..', __dir__)
 Dir.chdir(VENDOR_PATH) do
-  begin
-    exec "yarnpkg #{ARGV.join(" ")}"
-  rescue Errno::ENOENT
-    $stderr.puts "Yarn executable was not detected in the system."
-    $stderr.puts "Download Yarn at https://yarnpkg.com/en/docs/install"
-    exit 1
-  end
+  exec "yarnpkg #{ARGV.join(' ')}"
+rescue Errno::ENOENT
+  warn 'Yarn executable was not detected in the system.'
+  warn 'Download Yarn at https://yarnpkg.com/en/docs/install'
+  exit 1
 end
diff --git a/config.ru b/config.ru
index f7ba0b5..842bccc 100644
--- a/config.ru
+++ b/config.ru
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file is used by Rack-based servers to start the application.
 
 require_relative 'config/environment'
diff --git a/config/application.rb b/config/application.rb
index e3c36b1..2cc92e8 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -1,16 +1,18 @@
+# frozen_string_literal: true
+
 require_relative 'boot'
 
-require "rails"
+require 'rails'
 # Pick the frameworks you want:
-require "active_model/railtie"
-require "active_job/railtie"
-require "active_record/railtie"
-require "action_controller/railtie"
-require "action_mailer/railtie"
-require "action_view/railtie"
+require 'active_model/railtie'
+require 'active_job/railtie'
+require 'active_record/railtie'
+require 'action_controller/railtie'
+require 'action_mailer/railtie'
+require 'action_view/railtie'
 # require "action_cable/engine"
-require "sprockets/railtie"
-require "rails/test_unit/railtie"
+require 'sprockets/railtie'
+require 'rails/test_unit/railtie'
 
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.
diff --git a/config/boot.rb b/config/boot.rb
index 30f5120..30e594e 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
 
 require 'bundler/setup' # Set up gems listed in the Gemfile.
diff --git a/config/deploy.rb b/config/deploy.rb
index ae2674e..5b3fcc7 100644
--- a/config/deploy.rb
+++ b/config/deploy.rb
@@ -1,11 +1,12 @@
 # frozen_string_literal: true
+
 set :application, 'sutty'
 set :repo_url, 'git@0xacab.org:itacate-kefir/sutty.git'
 
 set :bundle_flags, '--deployment'
 set :default_env, path: '/usr/lib/passenger/bin:$PATH'
 
-set :linked_dirs, %w{_sites _deploy _usuarias _invitadxs public/covers}
-set :linked_files, %w{.env db/production.sqlite3}
+set :linked_dirs, %w[_sites _deploy _usuarias _invitadxs public/covers]
+set :linked_files, %w[.env db/production.sqlite3]
 
 set :keep_releases, 1
diff --git a/config/deploy/example.rb b/config/deploy/example.rb
index c1ace7c..29f5abf 100644
--- a/config/deploy/example.rb
+++ b/config/deploy/example.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 set :deploy_user, 'DEPLOY_USER'
 set :deploy_to, '/srv/http/sutty.kefir.red'
 set :branch, 'rails'
@@ -11,7 +12,7 @@ set :rbenv_type, :user
 set :rbenv_ruby, '2.3.6'
 
 set :rbenv_prefix, "RBENV_ROOT=#{fetch(:rbenv_path)} RBENV_VERSION=#{fetch(:rbenv_ruby)} #{fetch(:rbenv_path)}/bin/rbenv exec"
-set :rbenv_map_bins, %w(rake gem bundle ruby rails)
+set :rbenv_map_bins, %w[rake gem bundle ruby rails]
 set :rbenv_roles, :all # default value
 
 # Evitar compilar nokogiri
@@ -19,4 +20,4 @@ set :bundle_env_variables, nokogiri_use_system_libraries: 1
 
 server 'DEPLOY_SERVER',
        user: fetch(:deploy_user),
-       roles: %w(app web db)
+       roles: %w[app web db]
diff --git a/config/deploy/production.rb b/config/deploy/production.rb
index 94e514e..07c0a26 100644
--- a/config/deploy/production.rb
+++ b/config/deploy/production.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 set :deploy_user, 'app'
 set :deploy_to, '/srv/http/sutty.kefir.red'
 set :branch, 'rails'
@@ -11,7 +12,7 @@ set :rbenv_type, :user
 set :rbenv_ruby, '2.3.6'
 
 set :rbenv_prefix, "RBENV_ROOT=#{fetch(:rbenv_path)} RBENV_VERSION=#{fetch(:rbenv_ruby)} #{fetch(:rbenv_path)}/bin/rbenv exec"
-set :rbenv_map_bins, %w(rake gem bundle ruby rails)
+set :rbenv_map_bins, %w[rake gem bundle ruby rails]
 set :rbenv_roles, :all # default value
 
 # Evitar compilar nokogiri
@@ -19,4 +20,4 @@ set :bundle_env_variables, nokogiri_use_system_libraries: 1
 
 server 'miso',
        user: fetch(:deploy_user),
-       roles: %w(app web db)
+       roles: %w[app web db]
diff --git a/config/environment.rb b/config/environment.rb
index 426333b..d5abe55 100644
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Load the Rails application.
 require_relative 'application'
 
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 5d13e7a..ad1c4d9 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 7474a05..924b6ef 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
@@ -39,7 +41,6 @@ Rails.application.configure do
   # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
   # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
 
-
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true
 
@@ -48,7 +49,7 @@ Rails.application.configure do
   config.log_level = :debug
 
   # Prepend all log lines with the following tags.
-  config.log_tags = [ :request_id ]
+  config.log_tags = [:request_id]
 
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
@@ -76,7 +77,7 @@ Rails.application.configure do
   # require 'syslog/logger'
   # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
 
-  if ENV["RAILS_LOG_TO_STDOUT"].present?
+  if ENV['RAILS_LOG_TO_STDOUT'].present?
     logger           = ActiveSupport::Logger.new(STDOUT)
     logger.formatter = config.log_formatter
     config.logger    = ActiveSupport::TaggedLogging.new(logger)
@@ -93,9 +94,9 @@ Rails.application.configure do
   config.action_mailer.default_options = { from: ENV.fetch('DEFAULT_FROM', 'sutty@kefir.red') }
 
   config.middleware.use ExceptionNotification::Rack,
-    email: {
-      email_prefix: '[ERROR]',
-      sender_address: %(sutty@kefir.red),
-      exception_recipients: 'sysadmin@kefir.red'
-    }
+                        email: {
+                          email_prefix: '[ERROR]',
+                          sender_address: %(sutty@kefir.red),
+                          exception_recipients: 'sysadmin@kefir.red'
+                        }
 end
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 8e5cbde..669350a 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
diff --git a/config/initializers/application_controller_renderer.rb b/config/initializers/application_controller_renderer.rb
index 89d2efa..6d56e43 100644
--- a/config/initializers/application_controller_renderer.rb
+++ b/config/initializers/application_controller_renderer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # ActiveSupport::Reloader.to_prepare do
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index 4b828e8..a9b0d0f 100644
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
diff --git a/config/initializers/backtrace_silencers.rb b/config/initializers/backtrace_silencers.rb
index 59385cd..4b63f28 100644
--- a/config/initializers/backtrace_silencers.rb
+++ b/config/initializers/backtrace_silencers.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
diff --git a/config/initializers/carrierwave.rb b/config/initializers/carrierwave.rb
index 2ff728f..8b11537 100644
--- a/config/initializers/carrierwave.rb
+++ b/config/initializers/carrierwave.rb
@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 CarrierWave.configure do |config|
-  config.permissions = 0640
-  config.directory_permissions = 0750
+  config.permissions = 0o640
+  config.directory_permissions = 0o750
   config.storage = :file
 end
diff --git a/config/initializers/commonmarker.rb b/config/initializers/commonmarker.rb
index 4f98c68..4d6743f 100644
--- a/config/initializers/commonmarker.rb
+++ b/config/initializers/commonmarker.rb
@@ -1,18 +1,17 @@
+# frozen_string_literal: true
+
 require 'commonmarker'
 
 module Haml::Filters
-
-  remove_filter("Markdown") #remove the existing Markdown filter
+  remove_filter('Markdown') # remove the existing Markdown filter
 
   module Markdown
-
     include Haml::Filters::Base
 
     def render(text)
       CommonMarker.render_html(text,
-        [:TABLE_PREFER_STYLE_ATTRIBUTES],
-        [:table,:strikethrough,:autolink,:tagfilter])
+                               [:TABLE_PREFER_STYLE_ATTRIBUTES],
+                               %i[table strikethrough autolink tagfilter])
     end
-
   end
 end
diff --git a/config/initializers/cookies_serializer.rb b/config/initializers/cookies_serializer.rb
index 5a6a32d..ee8dff9 100644
--- a/config/initializers/cookies_serializer.rb
+++ b/config/initializers/cookies_serializer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Specify a serializer for the signed and encrypted cookie jars.
diff --git a/config/initializers/filter_parameter_logging.rb b/config/initializers/filter_parameter_logging.rb
index 4a994e1..7a4f47b 100644
--- a/config/initializers/filter_parameter_logging.rb
+++ b/config/initializers/filter_parameter_logging.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Configure sensitive parameters which will be filtered from the log file.
diff --git a/config/initializers/inflections.rb b/config/initializers/inflections.rb
index d5cf5d8..cd74149 100644
--- a/config/initializers/inflections.rb
+++ b/config/initializers/inflections.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 ActiveSupport::Inflector.inflections(:en) do |inflect|
   inflect.plural 'invitadx', 'invitadxs'
   inflect.singular 'invitadxs', 'invitadx'
diff --git a/config/initializers/locale.rb b/config/initializers/locale.rb
index 71e5a74..056f48a 100644
--- a/config/initializers/locale.rb
+++ b/config/initializers/locale.rb
@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
-  config.i18n.available_locales = [:es, :en, :ar]
+  config.i18n.available_locales = %i[es en ar]
   config.i18n.default_locale = :es
 end
diff --git a/config/initializers/mime_types.rb b/config/initializers/mime_types.rb
index dc18996..be6fedc 100644
--- a/config/initializers/mime_types.rb
+++ b/config/initializers/mime_types.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Add new mime types for use in respond_to blocks:
diff --git a/config/initializers/warden.rb b/config/initializers/warden.rb
index aec9a8b..b527966 100644
--- a/config/initializers/warden.rb
+++ b/config/initializers/warden.rb
@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 require 'warden/imap'
 require 'warden/email_and_password'
 
 Rails.configuration.middleware.use RailsWarden::Manager do |manager|
   manager.default_strategies :email, :imap
-  manager.failure_app = -> (env) { LoginController.action(:new).call(env) }
+  manager.failure_app = ->(env) { LoginController.action(:new).call(env) }
 end
 
 class Warden::SessionSerializer
diff --git a/config/initializers/wrap_parameters.rb b/config/initializers/wrap_parameters.rb
index bbfc396..2f3c0db 100644
--- a/config/initializers/wrap_parameters.rb
+++ b/config/initializers/wrap_parameters.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # This file contains settings for ActionController::ParamsWrapper which
diff --git a/config/puma.rb b/config/puma.rb
index 1e19380..7d53b13 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -1,19 +1,21 @@
+# frozen_string_literal: true
+
 # Puma can serve each request in a thread from an internal thread pool.
 # The `threads` method setting takes two numbers: a minimum and maximum.
 # Any libraries that use thread pools should be configured to match
 # the maximum value specified for Puma. Default is set to 5 threads for minimum
 # and maximum; this matches the default thread size of Active Record.
 #
-threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
+threads_count = ENV.fetch('RAILS_MAX_THREADS') { 1 }
 threads threads_count, threads_count
 
 # Specifies the `port` that Puma will listen on to receive requests; default is 3000.
 #
-port        ENV.fetch("PORT") { 3000 }
+port        ENV.fetch('PORT') { 3000 }
 
 # Specifies the `environment` that Puma will run in.
 #
-environment ENV.fetch("RAILS_ENV") { "development" }
+environment ENV.fetch('RAILS_ENV') { 'development' }
 
 # Specifies the number of `workers` to boot in clustered mode.
 # Workers are forked webserver processes. If using threads and workers together
diff --git a/config/routes.rb b/config/routes.rb
index 4340a9b..fab13c9 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.routes.draw do
   root 'application#index'
 
@@ -7,16 +9,15 @@ Rails.application.routes.draw do
 
   get 'markdown', to: 'application#markdown'
 
-
   # XXX Mantenemos solo esta ruta acá porque form_for no reconoce @site
   # como un objeto válido
   resources :invitadxs, only: [:create]
 
-  resources :sites, only: [:index, :show], constraints: { site_id: /[^\/]+/, id: /[^\/]+/ } do
+  resources :sites, only: %i[index show], constraints: { site_id: %r{[^/]+}, id: %r{[^/]+} } do
     get 'public/:type/:basename', to: 'sites#send_public_file'
     resources :posts
     resources :templates
-    resources :invitadxs, only: [:index, :new, :show] do
+    resources :invitadxs, only: %i[index new show] do
       get :confirmation, to: 'invitadxs#confirmation'
     end
     get :'invitadxs/login/new', to: 'login#new'
diff --git a/config/schedule.rb b/config/schedule.rb
index 7174101..c17dbfd 100644
--- a/config/schedule.rb
+++ b/config/schedule.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 env 'MAILTO', 'sysadmin@kefir.red'
 job_type :bash, 'cd :path && ./bin/:task'
 
diff --git a/config/spring.rb b/config/spring.rb
index 0b96270..b1293ae 100644
--- a/config/spring.rb
+++ b/config/spring.rb
@@ -1,14 +1,16 @@
+# frozen_string_literal: true
+
 # https://github.com/thoughtbot/ember-cli-rails/issues/479#issuecomment-241302961
 Spring::Watcher::Listen.class_eval do
   def base_directories
-    %w(app config db lib test vendor)
+    %w[app config db lib test vendor]
       .uniq.map { |path| Pathname.new(File.join(root, path)) }
   end
 end
 
-%w(
+%w[
   .ruby-version
   .rbenv-vars
   tmp/restart.txt
   tmp/caching-dev.txt
-).each { |path| Spring.watch(path) }
+].each { |path| Spring.watch(path) }
diff --git a/db/migrate/20180925183241_create_invitadxs.rb b/db/migrate/20180925183241_create_invitadxs.rb
index 7fafd54..99dfb87 100644
--- a/db/migrate/20180925183241_create_invitadxs.rb
+++ b/db/migrate/20180925183241_create_invitadxs.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateInvitadxs < ActiveRecord::Migration[5.1]
   def change
     create_table :invitadxs do |t|
diff --git a/db/migrate/20190211184815_add_acepta_politicas_de_privacidad_to_invitadx.rb b/db/migrate/20190211184815_add_acepta_politicas_de_privacidad_to_invitadx.rb
index d2cec55..a917389 100644
--- a/db/migrate/20190211184815_add_acepta_politicas_de_privacidad_to_invitadx.rb
+++ b/db/migrate/20190211184815_add_acepta_politicas_de_privacidad_to_invitadx.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddAceptaPoliticasDePrivacidadToInvitadx < ActiveRecord::Migration[5.1]
   def change
     add_column :invitadxs, :acepta_politicas_de_privacidad, :boolean, default: false
diff --git a/db/seeds.rb b/db/seeds.rb
index 1beea2a..ebd1889 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file should contain all the record creation needed to seed the database with its default values.
 # The data can then be loaded with the rails db:seed command (or created alongside the database with db:setup).
 #
diff --git a/lib/warden/email_and_password.rb b/lib/warden/email_and_password.rb
index 8f05f00..3586f9e 100644
--- a/lib/warden/email_and_password.rb
+++ b/lib/warden/email_and_password.rb
@@ -1,11 +1,13 @@
+# frozen_string_literal: true
+
 require 'email_address'
 module Warden
   module EmailAndPassword
-
     class Strategy < Warden::Strategies::Base
       def valid?
         return false unless params.include? 'username'
         return false unless params.include? 'password'
+
         username = params['username']
         @email = EmailAddress.new(username, host_validation: :a)
 
diff --git a/lib/warden/imap.rb b/lib/warden/imap.rb
index a5f5646..87ade2e 100644
--- a/lib/warden/imap.rb
+++ b/lib/warden/imap.rb
@@ -55,4 +55,3 @@ module Warden
     end
   end
 end
-
diff --git a/test/application_system_test_case.rb b/test/application_system_test_case.rb
index d19212a..652febb 100644
--- a/test/application_system_test_case.rb
+++ b/test/application_system_test_case.rb
@@ -1,4 +1,6 @@
-require "test_helper"
+# frozen_string_literal: true
+
+require 'test_helper'
 
 class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
   driven_by :selenium, using: :chrome, screen_size: [1400, 1400]
diff --git a/test/models/post_test.rb b/test/models/post_test.rb
index c67bdb6..ee441b4 100644
--- a/test/models/post_test.rb
+++ b/test/models/post_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class PostTest < ActiveSupport::TestCase
diff --git a/test/models/site_test.rb b/test/models/site_test.rb
index 52deb29..e655a9d 100644
--- a/test/models/site_test.rb
+++ b/test/models/site_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class SiteTest < ActiveSupport::TestCase
@@ -9,7 +11,7 @@ class SiteTest < ActiveSupport::TestCase
     @site.read
   end
 
-  test "El directorio es un sitio jekyll" do
+  test 'El directorio es un sitio jekyll' do
     assert Site.jekyll?(@path)
   end
 
@@ -27,21 +29,21 @@ class SiteTest < ActiveSupport::TestCase
 
   test 'No podemos poner órdenes arbitrarios' do
     total = @site.posts.count
-    new_order = Hash[total.times.map { |i| [i.to_s,rand(total)] }]
+    new_order = Hash[total.times.map { |i| [i.to_s, rand(total)] }]
 
     assert_not @site.reorder_collection('posts', new_order)
   end
 
   test 'Si les damos un orden alternativo los reordenamos' do
     total = @site.posts.count
-    order = total.times.map { |i| i.to_s }
+    order = total.times.map(&:to_s)
     new_order = Hash[order.zip(order.shuffle)]
 
     assert @site.reorder_collection('posts', new_order)
 
     # podemos hacer este test porque reordenar los posts no ordena el
     # array
-    new_order.each do |k,v|
+    new_order.each do |k, v|
       v = v.to_i
       k = k.to_i
       assert_equal v, @site.posts[k].order
@@ -50,14 +52,14 @@ class SiteTest < ActiveSupport::TestCase
 
   test 'Podemos reordenar solo una parte de los artículos' do
     total = @site.posts.count
-    order = (total - rand(total - 1)).times.map { |i| i.to_s }
+    order = (total - rand(total - 1)).times.map(&:to_s)
     new_order = Hash[order.zip(order.shuffle)]
 
     assert @site.reorder_collection('posts', new_order)
 
     # podemos hacer este test porque reordenar los posts no ordena el
     # array
-    new_order.each do |k,v|
+    new_order.each do |k, v|
       v = v.to_i
       k = k.to_i
       assert_equal v, @site.posts[k].order
@@ -75,7 +77,7 @@ class SiteTest < ActiveSupport::TestCase
 
   test 'El sitio tiene layouts' do
     assert_equal %w[anexo archive default feed header.ar header.en
-      header.es header license.ar license.en license.es license pandoc
-      politicas sesion simple style ].sort, @site.layouts
+                    header.es header license.ar license.en license.es license pandoc
+                    politicas sesion simple style ].sort, @site.layouts
   end
 end
diff --git a/test/models/usuaria_test.rb b/test/models/usuaria_test.rb
index fc7d103..1bff620 100644
--- a/test/models/usuaria_test.rb
+++ b/test/models/usuaria_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class UsuariaTest < ActiveSupport::TestCase
@@ -6,11 +8,11 @@ class UsuariaTest < ActiveSupport::TestCase
     @usuaria = Usuaria.find(@mail)
   end
 
-  test "La usuaria puede encontrarse por su mail" do
+  test 'La usuaria puede encontrarse por su mail' do
     assert_equal @mail, @usuaria.username
   end
 
-  test "La usuaria tiene sitios" do
+  test 'La usuaria tiene sitios' do
     @usuaria.sites.each do |s|
       assert_equal Site, s.class
     end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index aad06af..8a5709e 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,4 +1,6 @@
-require File.expand_path('../../config/environment', __FILE__)
+# frozen_string_literal: true
+
+require File.expand_path('../config/environment', __dir__)
 require 'rails/test_help'
 require 'open3'
 
@@ -6,7 +8,7 @@ class ActiveSupport::TestCase
   # Resetear el repositorio a su estado original antes de leerlo
   def reset_git_repo(path)
     Dir.chdir(path) do
-      Open3::popen3('git reset --hard') do |_, _, _, thread|
+      Open3.popen3('git reset --hard') do |_, _, _, thread|
         # Wait for the process to finish
         thread.value
       end