agregar un menu para poder filtrar por categoria

Gemfile

@@ -34,7 +34,7 @@ gem 'commonmarker'
 gem 'email_address'
 gem 'rails_warden'
 gem 'haml-rails'
-gem 'bootstrap', '~> 4.0.0.beta3'
+gem 'bootstrap', '~> 4.0.0'
 gem 'jekyll'
 gem 'jquery-rails'
 gem 'font-awesome-rails'

Gemfile.lock

@@ -43,7 +43,7 @@ GEM
     airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (8.0.0)
-    autoprefixer-rails (8.3.0)
+    autoprefixer-rails (9.1.4)
       execjs
     bcrypt_pbkdf (1.0.0)
     bindex (0.5.0)
@@ -111,7 +111,7 @@ GEM
       activesupport (>= 4.0, < 6)
     execjs (2.7.0)
     fastimage (2.1.3)
-    ffi (1.9.23)
+    ffi (1.9.25)
     font-awesome-rails (4.7.0.4)
       railties (>= 3.2, < 6.0)
     forwardable-extended (2.6.0)
@@ -188,7 +188,7 @@ GEM
       mini_portile2 (~> 2.3.0)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    popper_js (1.12.9)
+    popper_js (1.14.3)
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
@@ -236,7 +236,7 @@ GEM
       sexp_processor (~> 4.9)
     rubyzip (1.2.1)
     safe_yaml (1.0.4)
-    sass (3.5.6)
+    sass (3.5.7)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -303,7 +303,7 @@ PLATFORMS
 
 DEPENDENCIES
   bcrypt_pbkdf
-  bootstrap (~> 4.0.0.beta3)
+  bootstrap (~> 4.0.0)
   capistrano
   capistrano-bundler
   capistrano-passenger
@@ -340,4 +340,4 @@ DEPENDENCIES
   whenever
 
 BUNDLED WITH
-   1.16.1
+   1.16.3

app/views/posts/index.haml

@@ -24,6 +24,16 @@
     - @site.translations.each do |l|
       = link_to t("i18n.#{l}"), site_posts_path(@site, category: @category, lang: l),
         class: 'btn btn-info'
+    .btn-group.pull-right
+      = link_to t('posts.categories'), site_posts_path(@site, lang: @lang), class: 'btn btn-secondary'
+      %button.btn.btn-secondary.dropdown-toggle.dropdown-toggle-split{data: { toggle: 'split' },
+        aria: { haspopup: 'true', expanded: 'false' }}
+        %span.sr-only= t('posts.dropdown')
+      .dropdown-menu
+        - @site.categories.each do |c|
+          = link_to c.split(':').first,
+            site_posts_path(@site, lang: @lang, category: c),
+            class: (params[:category] == c) ? 'dropdown-item active' : 'dropdown-item'
 
 .row
   .col

config/locales/en.yml

@@ -150,6 +150,7 @@ en:
     order: 'Order'
     new: 'New post'
     dropdown: 'Toggle dropdown'
+    categories: 'Everything'
     index: 'Posts'
     edit: 'Edit'
     save: 'Save'
@@ -158,7 +159,6 @@ en:
     title: 'Title'
     tags: 'Tags'
     tags_help: 'Comma separated!'
-    categories: 'Categories'
     tags: 'Tags'
     slug: 'Slug'
     slug_help: 'This is the name of the article on the URL, ie. /title/.

config/locales/es.yml

@@ -146,6 +146,8 @@ es:
       order: 'posición'
       date: 'fecha'
     order: 'Posición'
+    categories: 'Todos'
+    dropdown: 'Desplegar el menú'
     new: 'Empezar un artículo nuevo'
     index: 'Artículos'
     edit: 'Editar'