feat(background_processor): include redis docker configuration

lib/potassium/assets/redis.yml

@@ -1,6 +1,5 @@
 development: &default
-  host: <%= ENV["BOXEN_REDIS_HOST"] || ENV["REDIS_HOST"] || "127.0.0.1" %>
-  port: <%= ENV["BOXEN_REDIS_PORT"] || ENV["REDIS_PORT"] || 6379 %>
+  url: <%= ENV.fetch("REDIS_URL") %>
 
 test:
   <<: *default

lib/potassium/recipes/background_processor.rb

@@ -12,7 +12,11 @@ def ask
   end
 
   def create
-    add_sidekiq if get(:background_processor)
+    if get(:background_processor)
+      add_sidekiq
+      add_docker_compose_redis_config
+      set_redis_dot_env
+    end
   end
 
   def install
@@ -26,6 +30,35 @@ def installed?
     gem_exists?(/sidekiq/)
   end
 
+  private
+
+  def add_docker_compose_redis_config
+    compose = DockerHelpers.new('docker-compose.yml')
+
+    service_definition =
+      <<~YAML
+        image: redis
+        ports:
+          - 6379
+        volumes:
+          - redis_data:/data
+      YAML
+
+    compose.add_service('redis', service_definition)
+    compose.add_volume('redis_data')
+  end
+
+  def set_redis_dot_env
+    append_to_file(
+      '.env.development',
+      <<~TEXT
+        REDIS_HOST=127.0.0.1
+        REDIS_PORT=$(make services-port SERVICE=redis PORT=6379)
+        REDIS_URL=redis://${REDIS_HOST}:${REDIS_PORT}/1
+      TEXT
+    )
+  end
+
   def add_sidekiq
     gather_gem("sidekiq")
     add_adapters("sidekiq")

spec/features/background_processor_spec.rb

@@ -1,4 +1,5 @@
 require "spec_helper"
+require 'yaml'
 
 RSpec.describe "BackgroundProcessor" do
   context "working with sidekiq" do
@@ -41,6 +42,9 @@
     it "adds ENV vars" do
       content = IO.read("#{project_path}/.env.development")
       expect(content).to include("DB_POOL=25")
+      expect(content).to include('REDIS_HOST=127.0.0.1')
+      expect(content).to include('REDIS_PORT=$(make services-port SERVICE=redis PORT=6379)')
+      expect(content).to include('REDIS_URL=redis://${REDIS_HOST}:${REDIS_PORT}/1')
     end
 
     it "adds sidekiq.rb file" do
@@ -55,12 +59,19 @@
 
     it "adds redis.yml file" do
       content = IO.read("#{project_path}/config/redis.yml")
-      expect(content).to include("REDIS_HOST")
+      expect(content).to include("REDIS_URL")
     end
 
     it "mounts sidekiq app" do
       content = IO.read("#{project_path}/config/routes.rb")
       expect(content).to include("mount Sidekiq::Web => '/queue'")
     end
+
+    it 'adds redis to docker-compose' do
+      compose_file = IO.read("#{project_path}/docker-compose.yml")
+      compose_content = YAML.safe_load(compose_file, symbolize_names: true)
+
+      expect(compose_content[:services]).to include(:redis)
+    end
   end
 end