Precompile core stylesheets independently of themes

lib/stylesheet/manager.rb

@@ -42,6 +42,17 @@ class Stylesheet::Manager
   end
 
   def self.precompile_css
+    targets = [:desktop, :mobile, :desktop_rtl, :mobile_rtl, :admin, :wizard]
+    targets += Discourse.find_plugin_css_assets(include_disabled: true, mobile_view: true, desktop_view: true)
+
+    targets.each do |target|
+      STDERR.puts "precompile target: #{target}"
+
+      Stylesheet::Manager::Builder.new(target: target, manager: nil).compile(force: true)
+    end
+  end
+
+  def self.precompile_theme_css
     themes = Theme.where('user_selectable OR id = ?', SiteSetting.default_theme_id).pluck(:id, :name, :color_scheme_id)
     themes << nil
 
@@ -49,8 +60,7 @@ class Stylesheet::Manager
     color_schemes << ColorScheme.find_by(id: SiteSetting.default_dark_mode_color_scheme_id)
     color_schemes = color_schemes.compact.uniq
 
-    targets = [:desktop, :mobile, :desktop_rtl, :mobile_rtl, :desktop_theme, :mobile_theme, :admin, :wizard]
-    targets += Discourse.find_plugin_css_assets(include_disabled: true, mobile_view: true, desktop_view: true)
+    targets = [:desktop_theme, :mobile_theme]
 
     themes.each do |id, name, color_scheme_id|
       theme_id = id || SiteSetting.default_theme_id
@@ -193,15 +203,19 @@ class Stylesheet::Manager
   def stylesheet_details(target = :desktop, media = 'all')
     target = target.to_sym
     current_hostname = Discourse.current_hostname
+    is_theme_target = !!(target.to_s =~ THEME_REGEX)
+
+    array_cache_key = is_theme_target ?
+      "array_themes_#{@theme_ids.join(",")}_#{target}_#{current_hostname}" :
+      "array_#{target}_#{current_hostname}"
 
-    array_cache_key = "array_themes_#{@theme_ids.join(",")}_#{target}_#{current_hostname}"
     stylesheets = cache[array_cache_key]
     return stylesheets if stylesheets.present?
 
     @@lock.synchronize do
       stylesheets = []
       stale_theme_ids = []
-      theme_ids = target.to_s =~ THEME_REGEX ? @theme_ids : [@theme_id]
+      theme_ids = is_theme_target ? @theme_ids : [nil]
 
       theme_ids.each do |theme_id|
         cache_key = "path_#{target}_#{theme_id}_#{current_hostname}"
@@ -219,7 +233,8 @@ class Stylesheet::Manager
 
       scss_checker = ScssChecker.new(target, stale_theme_ids)
 
-      themes = @theme_id.blank? ? [nil] : load_themes(stale_theme_ids)
+      if is_theme_target
+        themes = load_themes(stale_theme_ids)
 
         themes.each do |theme|
           theme_id = theme&.id
@@ -240,6 +255,16 @@ class Stylesheet::Manager
           data[:new_href] = href
           stylesheets << data
         end
+      else
+        builder = Builder.new(target: target, manager: self)
+        builder.compile unless File.exists?(builder.stylesheet_fullpath)
+        href = builder.stylesheet_path(current_hostname)
+
+        cache.defer_set("path_#{target}__#{current_hostname}", href)
+
+        data = { target: target, new_href: href }
+        stylesheets << data
+      end
 
       cache.defer_set(array_cache_key, stylesheets.freeze)
       stylesheets

lib/tasks/assets.rake

@@ -51,7 +51,8 @@ task 'assets:precompile:css' => 'environment' do
       if ActiveRecord::Base.connection.table_exists?(Theme.table_name)
         STDERR.puts "Compiling css for #{db} #{Time.zone.now}"
         begin
-          Stylesheet::Manager.precompile_css
+          Stylesheet::Manager.precompile_css if db == "default"
+          Stylesheet::Manager.precompile_theme_css
         rescue PG::UndefinedColumn, ActiveModel::MissingAttributeError, NoMethodError => e
           STDERR.puts "#{e.class} #{e.message}: #{e.backtrace.join("\n")}"
           STDERR.puts "Skipping precompilation of CSS cause schema is old, you are precompiling prior to running migrations."

spec/components/stylesheet/manager_spec.rb

@@ -39,7 +39,7 @@ describe Stylesheet::Manager do
     }}
 
     it "generates the right links for non-theme targets" do
-      manager = manager(theme.id)
+      manager = manager(nil)
 
       hrefs = manager.stylesheet_details(:desktop, 'all')
 
@@ -607,8 +607,7 @@ describe Stylesheet::Manager do
     end
   end
 
-  # this test takes too long, we don't run it by default
-  describe ".precompile_css", if: ENV["RUN_LONG_TESTS"] == "1" do
+  describe "precompile css" do
     before do
       class << STDERR
         alias_method :orig_write, :write
@@ -661,14 +660,22 @@ describe Stylesheet::Manager do
 
       StylesheetCache.destroy_all
 
+      # only core
       Stylesheet::Manager.precompile_css
       results = StylesheetCache.pluck(:target)
+      expect(results.size).to eq(core_targets.size)
 
-      expect(results.size).to eq(24) # (2 themes x 8 targets) + (1 child Theme x 2 targets) + 6 color schemes (2 custom theme schemes, 4 base schemes)
+      StylesheetCache.destroy_all
 
-      core_targets.each do |tar|
-        expect(results.count { |target| target =~ /^#{tar}_(#{scheme1.id}|#{scheme2.id})$/ }).to eq(2)
-      end
+      # only themes
+      Stylesheet::Manager.precompile_theme_css
+      results = StylesheetCache.pluck(:target)
+      expect(results.size).to eq(12) # (2 themes * 2 targets) + (one child theme * 2 targets) + 6 color schemes (2 custom, 4 base schemes)
+
+      # themes + core
+      Stylesheet::Manager.precompile_css
+      results = StylesheetCache.pluck(:target)
+      expect(results.size).to eq(18) # core targets + 6 theme + 6 color schemes
 
       theme_targets.each do |tar|
         expect(results.count { |target| target =~ /^#{tar}_(#{user_theme.id}|#{default_theme.id})$/ }).to eq(2)
@@ -677,18 +684,11 @@ describe Stylesheet::Manager do
       Theme.clear_default!
       StylesheetCache.destroy_all
 
+      # themes + core with no theme set as default
       Stylesheet::Manager.precompile_css
+      Stylesheet::Manager.precompile_theme_css
       results = StylesheetCache.pluck(:target)
-
-      expect(results.size).to eq(30) # (2 themes x 8 targets) + (1 child Theme x 2 targets) + (1 no/default/core theme x 6 core targets) + 6 color schemes (2 custom theme schemes, 4 base schemes)
-
-      core_targets.each do |tar|
-        expect(results.count { |target| target =~ /^(#{tar}_(#{scheme1.id}|#{scheme2.id})|#{tar})$/ }).to eq(3)
-      end
-
-      theme_targets.each do |tar|
-        expect(results.count { |target| target =~ /^#{tar}_(#{user_theme.id}|#{default_theme.id})$/ }).to eq(2)
-      end
+      expect(results.size).to eq(18) # core targets + 6 theme + 6 color schemes
 
       expect(results).to include(color_scheme_targets[0])
       expect(results).to include(color_scheme_targets[1])