From 541fe9b110fce15c42ba15df27926552c234afd0 Mon Sep 17 00:00:00 2001
From: kibigo! <marrus-sh@users.noreply.github.com>
Date: Thu, 30 Nov 2017 19:29:47 -0800
Subject: [PATCH] Skins support

---
 app/controllers/application_controller.rb     | 43 +++++++++++------
 .../settings/preferences_controller.rb        |  1 +
 app/javascript/core/common.js                 |  3 ++
 app/javascript/core/settings.js               |  6 +++
 app/javascript/core/theme.yml                 |  4 +-
 app/javascript/packs/common.js                |  4 +-
 app/javascript/skins/vanilla/win95.scss       |  1 +
 .../styles/mastodon/components.scss           |  8 ++--
 app/javascript/styles/win95.scss              | 48 +++++++++----------
 app/javascript/themes/glitch/packs/common.js  |  2 -
 app/javascript/themes/glitch/packs/public.js  |  1 -
 app/javascript/themes/win95/index.js          | 10 ----
 app/javascript/themes/win95/theme.yml         | 18 -------
 app/lib/themes.rb                             | 25 ++++++++++
 app/lib/user_settings_decorator.rb            |  7 ++-
 app/models/user.rb                            |  2 +-
 app/views/layouts/_theme.html.haml            |  7 ++-
 app/views/settings/preferences/show.html.haml |  1 +
 config/locales/simple_form.en.yml             |  2 +
 config/settings.yml                           |  1 +
 config/webpack/configuration.js               | 28 +++++++++--
 config/webpack/shared.js                      | 20 +++++++-
 22 files changed, 157 insertions(+), 85 deletions(-)
 create mode 100644 app/javascript/skins/vanilla/win95.scss
 delete mode 100644 app/javascript/themes/win95/index.js
 delete mode 100644 app/javascript/themes/win95/theme.yml

diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 7cc4eea275..f5753963df 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -12,6 +12,8 @@ class ApplicationController < ActionController::Base
 
   helper_method :current_account
   helper_method :current_session
+  helper_method :current_theme
+  helper_method :current_skin
   helper_method :single_user_mode?
 
   rescue_from ActionController::RoutingError, with: :not_found
@@ -52,14 +54,14 @@ class ApplicationController < ActionController::Base
     new_user_session_path
   end
 
-  def pack(data, pack_name)
+  def pack(data, pack_name, skin = 'default')
     return nil unless pack?(data, pack_name)
     pack_data = {
       common: pack_name == 'common' ? nil : resolve_pack(data['name'] ? Themes.instance.get(current_theme) : Themes.instance.core, 'common'),
       name: data['name'],
       pack: pack_name,
       preload: nil,
-      stylesheet: false
+      skin: nil,
     }
     if data['pack'][pack_name].is_a?(Hash)
       pack_data[:common] = nil if data['pack'][pack_name]['use_common'] == false
@@ -68,7 +70,11 @@ class ApplicationController < ActionController::Base
         pack_data[:preload] = [data['pack'][pack_name]['preload']] if data['pack'][pack_name]['preload'].is_a?(String)
         pack_data[:preload] = data['pack'][pack_name]['preload'] if data['pack'][pack_name]['preload'].is_a?(Array)
       end
-      pack_data[:stylesheet] = true if data['pack'][pack_name]['stylesheet']
+      if skin != 'default' && data['skin'][skin]
+        pack_data[:skin] = skin if data['skin'][skin].include?(pack_name)
+      else  #  default skin
+        pack_data[:skin] = 'default' if data['pack'][pack_name]['stylesheet']
+      end
     end
     pack_data
   end
@@ -80,39 +86,39 @@ class ApplicationController < ActionController::Base
     false
   end
 
-  def nil_pack(data, pack_name)
+  def nil_pack(data, pack_name, skin = 'default')
     {
-      common: pack_name == 'common' ? nil : resolve_pack(data['name'] ? Themes.instance.get(current_theme) : Themes.instance.core, 'common'),
+      common: pack_name == 'common' ? nil : resolve_pack(data['name'] ? Themes.instance.get(current_theme) : Themes.instance.core, 'common', skin),
       name: data['name'],
       pack: nil,
       preload: nil,
-      stylesheet: false
+      skin: nil,
     }
   end
 
-  def resolve_pack(data, pack_name)
-    result = pack(data, pack_name)
+  def resolve_pack(data, pack_name, skin = 'default')
+    result = pack(data, pack_name, skin)
     unless result
       if data['name'] && data.key?('fallback')
         if data['fallback'].nil?
-          return nil_pack(data, pack_name)
+          return nil_pack(data, pack_name, skin)
         elsif data['fallback'].is_a?(String) && Themes.instance.get(data['fallback'])
-          return resolve_pack(Themes.instance.get(data['fallback']), pack_name)
+          return resolve_pack(Themes.instance.get(data['fallback']), pack_name, skin)
         elsif data['fallback'].is_a?(Array)
           data['fallback'].each do |fallback|
-            return resolve_pack(Themes.instance.get(fallback), pack_name) if Themes.instance.get(fallback)
+            return resolve_pack(Themes.instance.get(fallback), pack_name, skin) if Themes.instance.get(fallback)
           end
         end
-        return nil_pack(data, pack_name)
+        return nil_pack(data, pack_name, skin)
       end
-      return data.key?('name') && data['name'] != default_theme ? resolve_pack(Themes.instance.get(default_theme), pack_name) : nil_pack(data, pack_name)
+      return data.key?('name') && data['name'] != default_theme ? resolve_pack(Themes.instance.get(default_theme), pack_name, skin) : nil_pack(data, pack_name, skin)
     end
     result
   end
 
   def use_pack(pack_name)
     @core = resolve_pack(Themes.instance.core, pack_name)
-    @theme = resolve_pack(Themes.instance.get(current_theme), pack_name)
+    @theme = resolve_pack(Themes.instance.get(current_theme), pack_name, current_skin)
   end
 
   protected
@@ -154,6 +160,15 @@ class ApplicationController < ActionController::Base
     current_user.setting_theme
   end
 
+  def default_skin
+    'default'
+  end
+
+  def current_skin
+    return default_skin unless Themes.instance.skins_for(current_theme).include? current_user&.setting_skin
+    current_user.setting_skin
+  end
+
   def cache_collection(raw, klass)
     return raw unless klass.respond_to?(:with_includes)
 
diff --git a/app/controllers/settings/preferences_controller.rb b/app/controllers/settings/preferences_controller.rb
index 3aefd90a2d..56baebed26 100644
--- a/app/controllers/settings/preferences_controller.rb
+++ b/app/controllers/settings/preferences_controller.rb
@@ -39,6 +39,7 @@ class Settings::PreferencesController < Settings::BaseController
       :setting_system_font_ui,
       :setting_noindex,
       :setting_theme,
+      :setting_skin,
       notification_emails: %i(follow follow_request reblog favourite mention digest),
       interactions: %i(must_be_follower must_be_following)
     )
diff --git a/app/javascript/core/common.js b/app/javascript/core/common.js
index 24c0fdf612..bb4b979351 100644
--- a/app/javascript/core/common.js
+++ b/app/javascript/core/common.js
@@ -1,5 +1,8 @@
 //  This file will be loaded on all pages, regardless of theme.
 
 import { start } from 'rails-ujs';
+import 'font-awesome/css/font-awesome.css';
+
+require.context('images/', true);
 
 start();
diff --git a/app/javascript/core/settings.js b/app/javascript/core/settings.js
index 7fb1d8e77a..bc5f9ed1d9 100644
--- a/app/javascript/core/settings.js
+++ b/app/javascript/core/settings.js
@@ -3,6 +3,8 @@
 const { length } = require('stringz');
 const { delegate } = require('rails-ujs');
 
+import { processBio } from 'themes/glitch/util/bio_metadata';
+
 delegate(document, '.account_display_name', 'input', ({ target }) => {
   const nameCounter = document.querySelector('.name-counter');
 
@@ -35,3 +37,7 @@ delegate(document, '#account_header', 'change', ({ target }) => {
 
   header.style.backgroundImage = `url(${url})`;
 });
+
+delegate(document, '#user_setting_theme', 'change', ({ target }) => {
+  target.form.submit();
+});
diff --git a/app/javascript/core/theme.yml b/app/javascript/core/theme.yml
index 17e8e66b32..0dc05a1493 100644
--- a/app/javascript/core/theme.yml
+++ b/app/javascript/core/theme.yml
@@ -4,7 +4,9 @@ pack:
   about:
   admin: admin.js
   auth:
-  common: common.js
+  common:
+    filename: common.js
+    stylesheet: true
   embed: embed.js
   error:
   home:
diff --git a/app/javascript/packs/common.js b/app/javascript/packs/common.js
index f3156c1c66..5d42509c5f 100644
--- a/app/javascript/packs/common.js
+++ b/app/javascript/packs/common.js
@@ -1,3 +1 @@
-import 'font-awesome/css/font-awesome.css';
-import 'styles/application.scss'
-require.context('../images/', true);
+import 'styles/application.scss';
diff --git a/app/javascript/skins/vanilla/win95.scss b/app/javascript/skins/vanilla/win95.scss
new file mode 100644
index 0000000000..298f6ee9d5
--- /dev/null
+++ b/app/javascript/skins/vanilla/win95.scss
@@ -0,0 +1 @@
+@import 'styles/win95';
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 0ded6f1596..8566585c5c 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -2075,7 +2075,7 @@
 .getting-started {
   box-sizing: border-box;
   padding-bottom: 235px;
-  background: url('../images/mastodon-getting-started.png') no-repeat 0 100%;
+  background: url('~images/mastodon-getting-started.png') no-repeat 0 100%;
   flex: 1 0 auto;
 
   p {
@@ -2270,7 +2270,7 @@ button.icon-button.active i.fa-retweet {
   justify-content: center;
 
   & > div {
-    background: url('../images/mastodon-not-found.png') no-repeat center -50px;
+    background: url('~images/mastodon-not-found.png') no-repeat center -50px;
     padding-top: 210px;
     width: 100%;
   }
@@ -3143,7 +3143,7 @@ button.icon-button.active i.fa-retweet {
   img,
   canvas {
     display: block;
-    background: url('../images/void.png') repeat;
+    background: url('~images/void.png') repeat;
     object-fit: contain;
   }
 
@@ -3390,7 +3390,7 @@ button.icon-button.active i.fa-retweet {
 }
 
 .onboarding-modal__page-one__elephant-friend {
-  background: url('../images/elephant-friend-1.png') no-repeat center center / contain;
+  background: url('~images/elephant-friend-1.png') no-repeat center center / contain;
   width: 155px;
   height: 193px;
   margin-right: 15px;
diff --git a/app/javascript/styles/win95.scss b/app/javascript/styles/win95.scss
index 6c89fc5bf6..d683218b06 100644
--- a/app/javascript/styles/win95.scss
+++ b/app/javascript/styles/win95.scss
@@ -1,7 +1,7 @@
 //  win95 theme from cybrespace.
 
-//  Modified to inherit glitch styles (themes/glitch/styles/index.scss)
-//  instead of vanilla ones (./application.scss)
+//  Modified by kibi! to use webpack package syntax for urls (eg,
+//  `url(~images/…)`) for easy importing into skins.
 
 $win95-bg: #bfbfbf;
 $win95-dark-grey: #404040;
@@ -73,10 +73,10 @@ $ui-highlight-color: $win95-window-header;
 
 @font-face {
   font-family:"premillenium";
-  src: url('../fonts/premillenium/MSSansSerif.ttf') format('truetype');
+  src: url('~fonts/premillenium/MSSansSerif.ttf') format('truetype');
 }
 
-@import '../themes/glitch/styles/index';  //  Imports glitch themes
+@import 'application';
 
 /* borrowed from cybrespace style: wider columns and full column width images */
 
@@ -179,7 +179,7 @@ body.admin {
   font-size:0px;
   color:$win95-bg;
 
-  background-image: url("../images/start.png");
+  background-image: url("~images/start.png");
   background-repeat:no-repeat;
   background-position:8%;
   background-clip:padding-box;
@@ -716,7 +716,7 @@ body.admin {
   font-size:0px;
   color:$win95-bg;
 
-  background-image: url("../images/start.png");
+  background-image: url("~images/start.png");
   background-repeat:no-repeat;
   background-position:8%;
   background-clip:padding-box;
@@ -1055,40 +1055,40 @@ body.admin {
 }
 
 .column-link[href="/web/timelines/public"] {
-  background-image: url("../images/icon_public.png");
-  &:hover { background-image: url("../images/icon_public.png"); }
+  background-image: url("~images/icon_public.png");
+  &:hover { background-image: url("~images/icon_public.png"); }
 }
 .column-link[href="/web/timelines/public/local"] {
-  background-image: url("../images/icon_local.png");
-  &:hover { background-image: url("../images/icon_local.png"); }
+  background-image: url("~images/icon_local.png");
+  &:hover { background-image: url("~images/icon_local.png"); }
 }
 .column-link[href="/web/pinned"] {
-  background-image: url("../images/icon_pin.png");
-  &:hover { background-image: url("../images/icon_pin.png"); }
+  background-image: url("~images/icon_pin.png");
+  &:hover { background-image: url("~images/icon_pin.png"); }
 }
 .column-link[href="/web/favourites"] {
-  background-image: url("../images/icon_likes.png");
-  &:hover { background-image: url("../images/icon_likes.png"); }
+  background-image: url("~images/icon_likes.png");
+  &:hover { background-image: url("~images/icon_likes.png"); }
 }
 .column-link[href="/web/blocks"] {
-  background-image: url("../images/icon_blocks.png");
-  &:hover { background-image: url("../images/icon_blocks.png"); }
+  background-image: url("~images/icon_blocks.png");
+  &:hover { background-image: url("~images/icon_blocks.png"); }
 }
 .column-link[href="/web/mutes"] {
-  background-image: url("../images/icon_mutes.png");
-  &:hover { background-image: url("../images/icon_mutes.png"); }
+  background-image: url("~images/icon_mutes.png");
+  &:hover { background-image: url("~images/icon_mutes.png"); }
 }
 .column-link[href="/settings/preferences"] {
-  background-image: url("../images/icon_settings.png");
-  &:hover { background-image: url("../images/icon_settings.png"); }
+  background-image: url("~images/icon_settings.png");
+  &:hover { background-image: url("~images/icon_settings.png"); }
 }
 .column-link[href="/about/more"] {
-  background-image: url("../images/icon_about.png");
-  &:hover { background-image: url("../images/icon_about.png"); }
+  background-image: url("~images/icon_about.png");
+  &:hover { background-image: url("~images/icon_about.png"); }
 }
 .column-link[href="/auth/sign_out"] {
-  background-image: url("../images/icon_logout.png");
-  &:hover { background-image: url("../images/icon_logout.png"); }
+  background-image: url("~images/icon_logout.png");
+  &:hover { background-image: url("~images/icon_logout.png"); }
 }
 
 .getting-started__footer {
diff --git a/app/javascript/themes/glitch/packs/common.js b/app/javascript/themes/glitch/packs/common.js
index f4fa129e1a..fd4254a0e4 100644
--- a/app/javascript/themes/glitch/packs/common.js
+++ b/app/javascript/themes/glitch/packs/common.js
@@ -1,3 +1 @@
-import 'font-awesome/css/font-awesome.css';
-require.context('images/', true);
 import 'themes/glitch/styles/index.scss';
diff --git a/app/javascript/themes/glitch/packs/public.js b/app/javascript/themes/glitch/packs/public.js
index d9a1b96559..410e66716b 100644
--- a/app/javascript/themes/glitch/packs/public.js
+++ b/app/javascript/themes/glitch/packs/public.js
@@ -1,5 +1,4 @@
 import loadPolyfills from 'themes/glitch/util/load_polyfills';
-import { processBio } from 'themes/glitch/util/bio_metadata';
 import ready from 'themes/glitch/util/ready';
 
 function main() {
diff --git a/app/javascript/themes/win95/index.js b/app/javascript/themes/win95/index.js
deleted file mode 100644
index bed6a1ef3d..0000000000
--- a/app/javascript/themes/win95/index.js
+++ /dev/null
@@ -1,10 +0,0 @@
-//  These lines are the same as in glitch:
-import 'font-awesome/css/font-awesome.css';
-require.context('../../images/', true);
-
-//  …But we want to use our own styles instead.
-import 'styles/win95.scss';
-
-//  Be sure to make this style file import from
-//  `themes/glitch/styles/index.scss` (the glitch styling), and not
-//  `application.scss` (which are the vanilla styles).
diff --git a/app/javascript/themes/win95/theme.yml b/app/javascript/themes/win95/theme.yml
deleted file mode 100644
index c4ac8aa55f..0000000000
--- a/app/javascript/themes/win95/theme.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-#  win95 theme.
-
-#  Ported over from `cybrespace:mastodon/theme_win95`.
-#  <https://github.com/cybrespace/mastodon/tree/theme_win95>
-
-#  You can use this theme file as inspiration for porting over
-#  a preëxisting Mastodon theme.
-
-#  We only modify the `common` pack, which contains our styling.
-pack:
-  common:
-    filename: index.js
-    stylesheet: true
-  #  All unspecified packs will inherit from glitch.
-
-#  The `fallback` parameter tells us to use glitch files for everything
-#  we haven't specified.
-fallback: glitch
diff --git a/app/lib/themes.rb b/app/lib/themes.rb
index 7ced9f945a..0819e2c908 100644
--- a/app/lib/themes.rb
+++ b/app/lib/themes.rb
@@ -17,10 +17,31 @@ class Themes
       name = File.basename(File.dirname(path))
       if data['pack']
         data['name'] = name
+        data['skin'] = { 'default' => [] }
         result[name] = data
       end
     end
 
+    Dir.glob(Rails.root.join('app', 'javascript', 'skins', '*', '*')) do |path|
+      ext = File.extname(path)
+      skin = File.basename(path)
+      name = File.basename(File.dirname(path))
+      if result[name]
+        if File.directory?(path)
+          pack = []
+          Dir.glob(File.join(path, '*.{css,scss}')) do |sheet|
+            pack.push(File.basename(sheet, File.extname(sheet)))
+          end
+        elsif ext.match?(/^\.s?css$/i)
+          skin = File.basename(path, ext)
+          pack = ['common']
+        end
+        if skin != 'default'
+          result[name]['skin'][skin] = pack
+        end
+      end
+    end
+
     @core = core
     @conf = result
 
@@ -37,4 +58,8 @@ class Themes
   def names
     @conf.keys
   end
+
+  def skins_for(name)
+    @conf[name]['skin'].keys
+  end
 end
diff --git a/app/lib/user_settings_decorator.rb b/app/lib/user_settings_decorator.rb
index d86959c0bb..730c701772 100644
--- a/app/lib/user_settings_decorator.rb
+++ b/app/lib/user_settings_decorator.rb
@@ -27,6 +27,7 @@ class UserSettingsDecorator
     user.settings['system_font_ui']      = system_font_ui_preference if change?('setting_system_font_ui')
     user.settings['noindex']             = noindex_preference if change?('setting_noindex')
     user.settings['theme']               = theme_preference if change?('setting_theme')
+    user.settings['skin']                = skin_preference if change?('setting_skin')
   end
 
   def merged_notification_emails
@@ -76,7 +77,11 @@ class UserSettingsDecorator
   def theme_preference
     settings['setting_theme']
   end
-  
+
+  def skin_preference
+    settings['setting_skin']
+  end
+
   def boolean_cast_setting(key)
     settings[key] == '1'
   end
diff --git a/app/models/user.rb b/app/models/user.rb
index b9b228c00d..1d42d4f701 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -74,7 +74,7 @@ class User < ApplicationRecord
   has_many :session_activations, dependent: :destroy
 
   delegate :auto_play_gif, :default_sensitive, :unfollow_modal, :boost_modal, :delete_modal,
-           :reduce_motion, :system_font_ui, :noindex, :theme,
+           :reduce_motion, :system_font_ui, :noindex, :theme, :skin,
            to: :settings, prefix: :setting, allow_nil: false
 
   def confirmed?
diff --git a/app/views/layouts/_theme.html.haml b/app/views/layouts/_theme.html.haml
index cdec4b370d..941ccc9148 100644
--- a/app/views/layouts/_theme.html.haml
+++ b/app/views/layouts/_theme.html.haml
@@ -3,8 +3,11 @@
     = render partial: 'layouts/theme', object: theme[:common]
   - if theme[:pack]
     = javascript_pack_tag theme[:name] ? "themes/#{theme[:name]}/#{theme[:pack]}" : "core/#{theme[:pack]}", integrity: true, crossorigin: 'anonymous'
-    - if theme[:stylesheet]
-      = stylesheet_pack_tag theme[:name] ? "themes/#{theme[:name]}/#{theme[:pack]}" : "core/#{theme[:pack]}", integrity: true, media: 'all'
+    - if theme[:skin]
+      - if !theme[:name] || theme[:skin] == 'default'
+        = stylesheet_pack_tag theme[:name] ? "themes/#{theme[:name]}/#{theme[:pack]}" : "core/#{theme[:pack]}", integrity: true, media: 'all'
+      - else
+        = stylesheet_pack_tag "skins/#{theme[:name]}/#{theme[:skin]}/#{theme[:pack]}"
     - if theme[:preload]
       - theme[:preload].each do |link|
         %link{ href: asset_pack_path("#{link}.js"), crossorigin: 'anonymous', rel: 'preload', as: 'script' }/
diff --git a/app/views/settings/preferences/show.html.haml b/app/views/settings/preferences/show.html.haml
index 69e26a7be2..0d487d9f38 100644
--- a/app/views/settings/preferences/show.html.haml
+++ b/app/views/settings/preferences/show.html.haml
@@ -28,6 +28,7 @@
   .fields-group
     - if Themes.instance.names.size > 1
       = f.input :setting_theme, collection: Themes.instance.names, label_method: lambda { |theme| I18n.t("themes.#{theme}", default: theme) }, wrapper: :with_label, include_blank: false
+      = f.input :setting_skin, collection: Themes.instance.skins_for(current_theme), label_method: lambda { |skin| I18n.t("themes.#{current_theme}.skins.#{skin}", default: skin) }, wrapper: :with_label, include_blank: false
 
     = f.input :setting_unfollow_modal, as: :boolean, wrapper: :with_label
     = f.input :setting_boost_modal, as: :boolean, wrapper: :with_label
diff --git a/config/locales/simple_form.en.yml b/config/locales/simple_form.en.yml
index faf41f316c..b9ef21fef1 100644
--- a/config/locales/simple_form.en.yml
+++ b/config/locales/simple_form.en.yml
@@ -15,6 +15,7 @@ en:
           other: <span class="note-counter">%{count}</span> characters left
         setting_noindex: Affects your public profile and status pages
         setting_theme: Affects how Mastodon looks when you're logged in from any device.
+        setting_skin: Reskins the selected Mastodon theme
       imports:
         data: CSV file exported from another Mastodon instance
       sessions:
@@ -47,6 +48,7 @@ en:
         setting_reduce_motion: Reduce motion in animations
         setting_system_font_ui: Use system's default font
         setting_theme: Site theme
+        setting_skin: Skin
         setting_unfollow_modal: Show confirmation dialog before unfollowing someone
         severity: Severity
         type: Import type
diff --git a/config/settings.yml b/config/settings.yml
index 6983484d0e..5abf647e87 100644
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -26,6 +26,7 @@ defaults: &defaults
   system_font_ui: false
   noindex: false
   theme: 'glitch'
+  skin: 'default'
   notification_emails:
     follow: false
     reblog: false
diff --git a/config/webpack/configuration.js b/config/webpack/configuration.js
index f8741c5d86..cb31c6ab83 100644
--- a/config/webpack/configuration.js
+++ b/config/webpack/configuration.js
@@ -1,15 +1,16 @@
 // Common configuration for webpacker loaded from config/webpacker.yml
 
-const { basename, dirname, join, resolve } = require('path');
+const { basename, dirname, extname, join, resolve } = require('path');
 const { env } = require('process');
 const { safeLoad } = require('js-yaml');
-const { readFileSync } = require('fs');
+const { lstatSync, readFileSync } = require('fs');
 const glob = require('glob');
 
 const configPath = resolve('config', 'webpacker.yml');
 const loadersDir = join(__dirname, 'loaders');
 const settings = safeLoad(readFileSync(configPath), 'utf8')[env.NODE_ENV];
 const themeFiles = glob.sync('app/javascript/themes/*/theme.yml');
+const skinFiles = glob.sync('app/javascript/skins/*/*');
 const themes = {};
 
 const core = function () {
@@ -25,14 +26,35 @@ for (let i = 0; i < themeFiles.length; i++) {
   const themeFile = themeFiles[i];
   const data = safeLoad(readFileSync(themeFile), 'utf8');
   data.name = basename(dirname(themeFile));
+  data.skin = {};
   if (!data.pack_directory) {
     data.pack_directory = dirname(themeFile);
   }
-  if (data.pack && typeof data.pack == 'object') {
+  if (data.pack && typeof data.pack === 'object') {
     themes[data.name] = data;
   }
 }
 
+for (let i = 0; i < skinFiles.length; i++) {
+  const skinFile = skinFiles[i];
+  let skin = basename(skinFile);
+  const name = basename(dirname(skinFile));
+  if (!themes[name]) {
+    continue;
+  }
+  const data = themes[name].skin;
+  if (lstatSync(skinFile).isDirectory()) {
+    data[skin] = {};
+    const skinPacks = glob.sync(skinFile, '*.{css,scss}');
+    for (let j = 0; j < skinPacks.length; j++) {
+      const pack = skinPacks[i];
+      data[skin][basename(pack, extname(pack))] = pack;
+    }
+  } else if ((skin = skin.match(/^(.*)\.s?css$/i))) {
+    data[skin[1]] = { common: skinFile };
+  }
+}
+
 function removeOuterSlashes(string) {
   return string.replace(/^\/*/, '').replace(/\/*$/, '');
 }
diff --git a/config/webpack/shared.js b/config/webpack/shared.js
index 5b90f27fb5..a2550bc819 100644
--- a/config/webpack/shared.js
+++ b/config/webpack/shared.js
@@ -1,7 +1,7 @@
 // Note: You must restart bin/webpack-dev-server for changes to take effect
 
 const webpack = require('webpack');
-const { basename, dirname, join, relative, resolve } = require('path');
+const { basename, join, resolve } = require('path');
 const { sync } = require('glob');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
 const ManifestPlugin = require('webpack-manifest-plugin');
@@ -24,6 +24,24 @@ function reducePacks (data, into = {}) {
     }
     return map;
   }, into);
+  if (data.name) {
+    Object.keys(data.skin).reduce((map, entry) => {
+      const skin = data.skin[entry];
+      const skinName = entry;
+      if (!skin) {
+        return map;
+      }
+      Object.keys(skin).reduce((map, entry) => {
+        const packFile = skin[entry];
+        if (!packFile) {
+          return map;
+        }
+        map[`skins/${data.name}/${skinName}/${entry}`] = resolve(packFile);
+        return map;
+      }, into);
+      return map;
+    }, into);
+  }
   return into;
 }