Support Tailwind CSS in core dummy app

This allows running the core dummy app with the Tailwind required for
setting sails towards the new frontend.

admin/lib/solidus_admin/testing_support/admin_assets.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+RSpec.configure do |config|
+ config.when_first_matching_example_defined(solidus_admin: true) do
+ config.before(:suite) do
+ system('bin/rails solidus_admin:tailwindcss:build') or abort 'Failed to build Tailwind CSS'
+ Rails.application.precompiled_assets
+ end
+ end
+end

admin/lib/solidus_admin/testing_support/dummy_app/rake_tasks.rb

@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+namespace :solidus_admin do
+ namespace :tailwindcss do
+ desc "Build Tailwind CSS"
+ task build: :dummy_environment do
+ require "solidus_admin"
+ require "tailwindcss/commands"
+
+ config_file = <<~JS
+ const adminRoot = "#{SolidusAdmin::Engine.root}"
+ const solidusAdmin = require(`${adminRoot}/config/tailwind.config.js`)
+
+ module.exports = {
+ // Read how to use TailwindCSS presets: https://tailwindcss.com/docs/presets.
+ presets: [solidusAdmin],
+
+ content: [
+ // Include paths coming from SolidusAdmin.
+ ...solidusAdmin.content,
+
+ // Include paths to your own components.
+ `${__dirname}/../../../../app/components/admin/**/*`,
+ `${__dirname}/../../../../lib/components/admin/**/*`,
+ ],
+ }
+ JS
+ FileUtils.mkdir_p(DummyApp::Application.root.join("config"))
+ File.write(DummyApp::Application.root.join("config/tailwind.config.js"), config_file)
+ FileUtils.mkdir_p(DummyApp::Application.root.join("app/assets/stylesheets/solidus_admin"))
+ FileUtils.cp(
+ SolidusAdmin::Engine.root.join("app/assets/stylesheets/solidus_admin/application.tailwind.css"),
+ DummyApp::Application.root.join("app/assets/stylesheets/solidus_admin/application.tailwind.css")
+ )
+
+ tailwindcss = Tailwindcss::Commands.executable
+
+ tailwindcss_command = [
+ tailwindcss,
+ "--config", DummyApp::Application.root.join("config/tailwind.config.js"),
+ "--input", DummyApp::Application.root.join("app/assets/stylesheets/solidus_admin/application.tailwind.css"),
+ "--output", DummyApp::Application.root.join("assets/builds/solidus_admin/tailwind.css")
+ ]
+
+ sh tailwindcss_command.shelljoin
+ end
+ end
+end
+
+# Attach Tailwind CSS build to other tasks.
+%w[
+ assets:precompile
+ test:prepare
+ spec:prepare
+ db:test:prepare
+].each do |task_name|
+ next unless Rake::Task.task_defined?(task_name)
+
+ Rake::Task[task_name].enhance(["solidus_admin:tailwindcss:build"])
+end

legacy_promotions/Rakefile

@@ -5,6 +5,7 @@ require 'rake'
 require 'rake/testtask'
 require 'rspec/core/rake_task'
 require 'spree/testing_support/dummy_app/rake_tasks'
+require 'solidus_admin/testing_support/dummy_app/rake_tasks'
 require 'bundler/gem_tasks'
 
 RSpec::Core::RakeTask.new

legacy_promotions/spec/rails_helper.rb

@@ -21,12 +21,7 @@
  }
  mount Spree::Core::Engine, at: "/"
 end
-
-unless SolidusAdmin::Engine.root.join('app/assets/builds/solidus_admin/tailwind.css').exist?
- Dir.chdir(SolidusAdmin::Engine.root) do
- system 'bundle exec rake tailwindcss:build' or abort 'Failed to build Tailwind CSS'
- end
-end
+require "solidus_admin/testing_support/admin_assets"
 
 require 'rails-controller-testing'
 require 'rspec/rails'