6 files changed, 41 insertions, 25 deletions
diff --git a/config/initializers/frontends.rb b/config/initializers/frontends.rb
deleted file mode 100644
index 2cb68cc61..000000000
--- a/config/initializers/frontends.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-# Be sure to restart your server when you modify this file.
-
-Rails.application.configure do
-  frontends = []
-  Rails.root.join('app', 'javascript', 'packs', 'frontends').each_child(false) { |f| frontends.push f.to_s }
-  config.x.available_frontends = frontends
-end
diff --git a/config/locales/simple_form.en.yml b/config/locales/simple_form.en.yml
index fb8524a24..f9d4e2e52 100644
--- a/config/locales/simple_form.en.yml
+++ b/config/locales/simple_form.en.yml
@@ -13,6 +13,7 @@ en:
           one: <span class="note-counter">1</span> character left
           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.
       imports:
         data: CSV file exported from another Mastodon instance
       sessions:
@@ -44,6 +45,7 @@ en:
         setting_noindex: Opt-out of search engine indexing
         setting_system_font_ui: Use system's default font
         setting_unfollow_modal: Show confirmation dialog before unfollowing someone
+        setting_theme: Site theme
         severity: Severity
         type: Import type
         username: Username
diff --git a/config/settings.yml b/config/settings.yml
index 39dfb8f55..3cd3307f4 100644
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -24,6 +24,7 @@ defaults: &defaults
   auto_play_gif: false
   system_font_ui: false
   noindex: false
+  theme: 'default'
   notification_emails:
     follow: false
     reblog: false
diff --git a/config/webpack/configuration.js b/config/webpack/configuration.js
index 6ef484c3a..606eb97f1 100644
--- a/config/webpack/configuration.js
+++ b/config/webpack/configuration.js
@@ -1,13 +1,27 @@
 // Common configuration for webpacker loaded from config/webpacker.yml
 
-const { join, resolve } = require('path');
+const { dirname, join, resolve } = require('path');
 const { env } = require('process');
 const { safeLoad } = require('js-yaml');
 const { 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 themes = {};
+
+for (let i = 0; i < themeFiles.length; i++) {
+  const themeFile = themeFiles[i];
+  const data = safeLoad(readFileSync(themeFile), 'utf8');
+  if (!data.pack_directory) {
+    data.pack_directory = dirname(themeFile);
+  }
+  if (data.name && data.pack) {
+    themes[data.name] = data;
+  }
+}
 
 function removeOuterSlashes(string) {
   return string.replace(/^\/*/, '').replace(/\/*$/, '');
@@ -29,6 +43,7 @@ const output = {
 
 module.exports = {
   settings,
+  themes,
   env,
   loadersDir,
   output,
diff --git a/config/webpack/loaders/sass.js b/config/webpack/loaders/sass.js
index 40e81b43b..96ad7abe8 100644
--- a/config/webpack/loaders/sass.js
+++ b/config/webpack/loaders/sass.js
@@ -9,7 +9,7 @@ module.exports = {
       { loader: 'css-loader', options: { minimize: env.NODE_ENV === 'production' } },
       { loader: 'postcss-loader', options: { sourceMap: true } },
       'resolve-url-loader',
-      { loader: 'sass-loader', options: { includePaths: ['app/javascript/styles'] } },
+      { loader: 'sass-loader', options: { includePaths: ['app/javascript'] } },
     ],
   }),
 };
diff --git a/config/webpack/shared.js b/config/webpack/shared.js
index be1b49421..ab925b020 100644
--- a/config/webpack/shared.js
+++ b/config/webpack/shared.js
@@ -1,13 +1,12 @@
 // Note: You must restart bin/webpack-dev-server for changes to take effect
 
-const { existsSync } = require('fs');
 const webpack = require('webpack');
 const { basename, dirname, join, relative, resolve } = require('path');
 const { sync } = require('glob');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
 const ManifestPlugin = require('webpack-manifest-plugin');
 const extname = require('path-complete-extname');
-const { env, settings, output, loadersDir } = require('./configuration.js');
+const { env, settings, themes, output, loadersDir } = require('./configuration.js');
 const localePackPaths = require('./generateLocalePacks');
 
 const extensionGlob = `**/*{${settings.extensions.join(',')}}*`;
@@ -18,17 +17,27 @@ const entryPacks = [...packPaths, ...localePackPaths].filter(path => path !== jo
 const customApplicationStyle = resolve(join(settings.source_path, 'styles/custom.scss'));
 const originalApplicationStyle = resolve(join(settings.source_path, 'styles/application.scss'));
 
+const themePaths = Object.keys(themes).reduce(
+  (themePaths, name) => {
+    themeData = themes[name];
+    themePaths[`themes/${name}`] = resolve(themeData.pack_directory, themeData.pack);
+    return themePaths;
+  }, {}
+);
+
 module.exports = {
-  entry: entryPacks.reduce(
-    (map, entry) => {
-      const localMap = map;
-      let namespace = relative(join(entryPath), dirname(entry));
-      if (namespace === join('..', '..', '..', 'tmp', 'packs')) {
-        namespace = ''; // generated by generateLocalePacks.js
-      }
-      localMap[join(namespace, basename(entry, extname(entry)))] = resolve(entry);
-      return localMap;
-    }, {}
+  entry: Object.assign(
+    entryPacks.reduce(
+      (map, entry) => {
+        const localMap = map;
+        let namespace = relative(join(entryPath), dirname(entry));
+        if (namespace === join('..', '..', '..', 'tmp', 'packs')) {
+          namespace = ''; // generated by generateLocalePacks.js
+        }
+        localMap[join(namespace, basename(entry, extname(entry)))] = resolve(entry);
+        return localMap;
+      }, {}
+    ), themePaths
   ),
 
   output: {
@@ -59,10 +68,6 @@ module.exports = {
   ],
 
   resolve: {
-    alias: {
-      'mastodon-application-style': existsSync(customApplicationStyle) ?
-                                    customApplicationStyle : originalApplicationStyle,
-    },
     extensions: settings.extensions,
     modules: [
       resolve(settings.source_path),