WIP: Introduce suspenders:install:web generator and application tem…

…plate

Create generator to invoke all necessary generators. We add it to the
`install` namespace to provide flexibility should we add other
installation options, such as ones for API Only applications.

We manually invoke generators rather than using `generate "suspenders:generator"`.
This is because in those cases, the generator is actually run, which
slows down the test suite dramatically.

More importantly, this allows us  to use [Mocha][] to mock generators in
an effort to improve testing. By mocking the generators, we ensure
they're not actually invoked, which would result in a slow test. Also,
it would mean we would need to build up extensive `prepare_destination`
and `restore_destination` method declarations.

[Mocha]: https://github.com/freerange/mocha

NEWS.md

@@ -9,6 +9,7 @@ Unreleased
 * Introduce `suspenders:jobs` generator
 * Introduce `suspenders:lint` generator
 * Introduce `suspenders:rake` generator
+* Introduce `suspenders:install:web` generator
 
 20230113.0 (January, 13, 2023)
 

README.md

@@ -9,14 +9,24 @@ if you like missing deadlines.
 
 ## Usage
 
+### Existing Rails Applications
+
 ```
 group :development, :test do
   gem "suspenders"
 end
 ```
 
 ```
-bin/rails g suspenders:all
+bin/rails g suspenders:install:web
+```
+
+### New Rails Applications
+
+```
+rails new my_app \
+-d=postgresql \
+-m=https://raw.githubusercontent.com/thoughtbot/suspenders/lib/install/web.rb
 ```
 
 ## Generators

lib/generators/suspenders/install/web_generator.rb

@@ -0,0 +1,40 @@
+require "generators/suspenders/accessibility_generator"
+require "generators/suspenders/styles_generator"
+require "generators/suspenders/advisories_generator"
+require "generators/suspenders/inline_svg_generator"
+require "generators/suspenders/factories_generator"
+require "generators/suspenders/jobs_generator"
+require "generators/suspenders/lint_generator"
+require "generators/suspenders/rake_generator"
+
+module Suspenders
+  module Generators
+    module Install
+      class WebGenerator < Rails::Generators::Base
+        include Suspenders::Generators::APIAppUnsupported
+
+        class_option :css, enum: Generators::CSS_OPTIONS
+
+        def invoke_generators
+          Suspenders::Generators::AccessibilityGenerator.new.invoke_all
+          Suspenders::Generators::StylesGenerator.new([], css: css).invoke_all
+          Suspenders::Generators::AdvisoriesGenerator.new.invoke_all
+          Suspenders::Generators::InlineSvgGenerator.new.invoke_all
+          Suspenders::Generators::FactoriesGenerator.new.invoke_all
+          Suspenders::Generators::JobsGenerator.new.invoke_all
+          Suspenders::Generators::RakeGenerator.new.invoke_all
+
+          # Needs to be invoked last, since it fixes any liting violations
+          # caused by the previous generators.
+          Suspenders::Generators::LintGenerator.new.invoke_all
+        end
+
+        private
+
+        def css
+          @css ||= options["css"]
+        end
+      end
+    end
+  end
+end

lib/generators/suspenders/styles_generator.rb

@@ -3,9 +3,7 @@ module Generators
     class StylesGenerator < Rails::Generators::Base
       include Suspenders::Generators::APIAppUnsupported
 
-      CSS_OPTIONS = %w[tailwind postcss].freeze
-
-      class_option :css, enum: CSS_OPTIONS, default: "postcss"
+      class_option :css, enum: Generators::CSS_OPTIONS, default: "postcss"
       desc <<~TEXT
         Configures applications to use PostCSS or Tailwind via cssbundling-rails.
         Defaults to PostCSS with modern-normalize, with the option to override via

lib/install/web.rb

@@ -0,0 +1,13 @@
+css = ask("What CSS framwork do you want to use? [postcss, tailwind]")
+
+raise ArgumentError if ["postcss","tailwind"].exclude? css
+
+after_bundle do
+  gem_group :development, :test do
+    gem "suspenders", github: "thoughtbot/suspenders", branch: "suspenders-3-0-0-web-generator"
+  end
+
+  run "bundle install"
+
+  generate "suspenders:install:web --css=#{css}"
+end

lib/suspenders/generators.rb

@@ -2,6 +2,9 @@
 
 module Suspenders
   module Generators
+
+    CSS_OPTIONS = %w[tailwind postcss].freeze
+
     module Helpers
       def default_test_suite?
         File.exist? Rails.root.join("test")

test/generators/suspenders/install/web_generator_test.rb

@@ -0,0 +1,87 @@
+require "test_helper"
+require "generators/suspenders/install/web_generator"
+
+module Suspenders
+  module Generators
+    module Install
+      class WebGeneratorTest < Rails::Generators::TestCase
+        include Suspenders::TestHelpers
+
+        tests Suspenders::Generators::Install::WebGenerator
+        destination Rails.root
+        setup :prepare_destination
+        teardown :restore_destination
+
+        test "raises if API only application" do
+          within_api_only_app do
+            assert_raises Suspenders::Generators::APIAppUnsupported::Error do
+              run_generator
+            end
+          end
+        end
+
+        test "invokes generators" do
+          accessibility_generator_mock = mock("accessibility_generator")
+          Suspenders::Generators::AccessibilityGenerator.stubs(:new).returns(accessibility_generator_mock)
+
+          styles_generator_mock = mock("styles_generator")
+          Suspenders::Generators::StylesGenerator.expects(:new).with([], css: "tailwind").returns(styles_generator_mock)
+
+          advisories_generator_mock = mock("advisories_generator")
+          Suspenders::Generators::AdvisoriesGenerator.stubs(:new).returns(advisories_generator_mock)
+
+          inline_svg_generator_mock = mock("inline_svg_generator")
+          Suspenders::Generators::InlineSvgGenerator.stubs(:new).returns(inline_svg_generator_mock)
+
+          facories_generator_mock = mock("facories_generator")
+          Suspenders::Generators::FactoriesGenerator.stubs(:new).returns(facories_generator_mock)
+
+          jobs_generator_mock = mock("jobs_generator")
+          Suspenders::Generators::JobsGenerator.stubs(:new).returns(jobs_generator_mock)
+
+          lint_generator_mock = mock("lint_generator")
+          Suspenders::Generators::LintGenerator.stubs(:new).returns(lint_generator_mock)
+
+          rake_generator_mock = mock("rake_generator")
+          Suspenders::Generators::RakeGenerator.stubs(:new).returns(rake_generator_mock)
+
+          accessibility_generator_mock.expects(:invoke_all).once
+          styles_generator_mock.expects(:invoke_all).once
+          advisories_generator_mock.expects(:invoke_all).once
+          inline_svg_generator_mock.expects(:invoke_all).once
+          facories_generator_mock.expects(:invoke_all).once
+          jobs_generator_mock.expects(:invoke_all).once
+          lint_generator_mock.expects(:invoke_all).once
+          rake_generator_mock.expects(:invoke_all).once
+
+          generator_class.new([], css: "tailwind").invoke_generators
+        end
+
+        test "requires a css option" do
+          option = generator_class.class_options[:css]
+
+          assert_equal :string, option.type
+          assert_not option.required
+          assert_equal %w[tailwind postcss], option.enum
+          assert_nil option.default
+        end
+
+        test "raises if css option is unsupported" do
+          output = capture(:stderr) { run_generator %w[--css=unknown] }
+
+          assert_match(/Expected '--css' to be one of/, output)
+        end
+
+        private
+
+        def prepare_destination
+          touch "Gemfile"
+        end
+
+        def restore_destination
+          remove_file_if_exists "Gemfile"
+        end
+      end
+    end
+  end
+end