Add compiler option :generate_assets

lib/mix/tasks/compile/surface.asset_generator.ex

@@ -12,6 +12,16 @@ defmodule Mix.Tasks.Compile.Surface.AssetGenerator do
   @hooks_extension "#{@hooks_tag}.{#{@supported_hooks_extensions}}"
 
   def run(components, opts \\ []) do
+    generate_assets? = Keyword.get(opts, :generate_assets, true)
+
+    if generate_assets? do
+      do_run(components, opts)
+    else
+      []
+    end
+  end
+
+  defp do_run(components, opts) do
     components = Enum.sort(components, :desc)
     hooks_output_dir = Keyword.get(opts, :hooks_output_dir, @default_hooks_output_dir)
     css_output_file = Keyword.get(opts, :css_output_file, @default_css_output_file)

lib/mix/tasks/compile/surface.ex

@@ -21,6 +21,10 @@ defmodule Mix.Tasks.Compile.Surface do
 
   ### Options
 
+  * `generate_assets` - instructs the compiler to generate components' css and js files.
+    Set it to `false` when developing a library of components that doesn't require any CSS
+    style nor JS hooks. Default is `true`.
+
   * `hooks_output_dir` - defines the folder where the compiler generates the JS hooks files.
     Default is `./assets/js/_hooks/`.
 
@@ -148,6 +152,7 @@ defmodule Mix.Tasks.Compile.Surface do
   ]
 
   @assets_opts [
+    :generate_assets,
     :hooks_output_dir,
     :css_output_file,
     :enable_variants,

test/mix/tasks/compile/surface.asset_generator_test.exs

@@ -374,6 +374,18 @@ defmodule Mix.Tasks.Compile.Surface.AssetGeneratorTest do
     refute File.exists?(@link_dest_hooks_file)
   end
 
+  test "don't generate assets if :generate_assets is false", %{opts: opts} do
+    refute File.exists?(@css_output_file)
+    refute File.exists?(@variants_output_file)
+    refute File.exists?(@hooks_output_dir)
+
+    assert run(@components, [generate_assets: false] ++ opts) == []
+
+    refute File.exists?(@css_output_file)
+    refute File.exists?(@variants_output_file)
+    refute File.exists?(@hooks_output_dir)
+  end
+
   test "returns diagnostic if component has more then 1 hook and uses the first one", %{opts: opts} do
     File.write!(@other_link_src_hooks_file, @link_src_hooks_file_content)
     refute File.exists?(@hooks_output_dir)