Improve Dockerfile when use some skip options

railties/lib/rails/generators/app_base.rb

@@ -271,7 +271,7 @@ def web_server_gemfile_entry # :doc:
       end
 
       def asset_pipeline_gemfile_entry
-        return if options[:skip_asset_pipeline]
+        return if skip_asset_pipeline?
 
         if options[:asset_pipeline] == "sprockets"
           GemfileEntry.floats "sprockets-rails",
@@ -335,7 +335,11 @@ def keeps? # :doc:
       end
 
       def sqlite3? # :doc:
-        !options[:skip_active_record] && options[:database] == "sqlite3"
+        !skip_active_record? && options[:database] == "sqlite3"
+      end
+
+      def skip_active_record? # :doc:
+        options[:skip_active_record]
       end
 
       def skip_active_storage? # :doc:
@@ -354,12 +358,16 @@ def skip_action_text? # :doc:
         options[:skip_action_text]
       end
 
+      def skip_asset_pipeline? # :doc:
+        options[:skip_asset_pipeline]
+      end
+
       def skip_sprockets?
-        options[:skip_asset_pipeline] || options[:asset_pipeline] != "sprockets"
+        skip_asset_pipeline? || options[:asset_pipeline] != "sprockets"
       end
 
       def skip_propshaft?
-        options[:skip_asset_pipeline] || options[:asset_pipeline] != "propshaft"
+        skip_asset_pipeline? || options[:asset_pipeline] != "propshaft"
       end
 
 
@@ -511,10 +519,10 @@ def dockerfile_binfile_fixups
 
       def dockerfile_build_packages
         # start with the essentials
-        packages = %w(build-essential git)
+        packages = %w(build-essential git pkg-config)
 
-        # add databases: sqlite3, postgres, mysql
-        packages += %w(pkg-config libpq-dev default-libmysqlclient-dev)
+        # add database support
+        packages << build_package_for_database unless skip_active_record?
 
         # ActiveStorage preview support
         packages << "libvips" unless skip_active_storage?
@@ -543,17 +551,19 @@ def dockerfile_build_packages
           end
         end
 
-        packages.sort
+        packages.compact.sort
       end
 
       def dockerfile_deploy_packages
-        # start with databases: sqlite3, postgres, mysql
-        packages = %w(libsqlite3-0 postgresql-client default-mysql-client)
+        packages = []
+
+        # ActiveRecord databases
+        packages << deploy_package_for_database unless skip_active_record?
 
         # ActiveStorage preview support
         packages << "libvips" unless skip_active_storage?
 
-        packages.sort
+        packages.compact.sort
       end
 
       # CSS processors other than Tailwind and Sass require a node-based JavaScript environment. So overwrite the normal JS default
@@ -727,6 +737,15 @@ def git_init_command
       def edge_branch
         self.class.edge_branch
       end
+
+      def dockerfile_chown_directories
+        directories = %w(log tmp)
+
+        directories << "storage" unless skip_active_storage? && !sqlite3?
+        directories << "db" unless skip_active_record?
+
+        directories.sort
+      end
     end
   end
 end

railties/lib/rails/generators/database.rb

@@ -38,6 +38,23 @@ def convert_database_option_for_jruby
         end
       end
 
+      def build_package_for_database(database = options[:database])
+        case database
+        when "mysql" then "default-libmysqlclient-dev"
+        when "postgresql" then "libpq-dev"
+        else nil
+        end
+      end
+
+      def deploy_package_for_database(database = options[:database])
+        case database
+        when "mysql" then "default-mysql-client"
+        when "postgresql" then "postgresql-client"
+        when "sqlite3" then "libsqlite3-0"
+        else nil
+        end
+      end
+
       private
         def mysql_socket
           @mysql_socket ||= [

railties/lib/rails/generators/rails/app/templates/Dockerfile.tt

@@ -58,7 +58,7 @@ RUN bundle exec bootsnap precompile app/ lib/
 <%= "RUN " + dockerfile_binfile_fixups.join(" && \\\n    ") %>
 
 <% end -%>
-<% unless options.api? -%>
+<% unless options.api? || skip_asset_pipeline? -%>
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
 RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
 
@@ -67,18 +67,20 @@ RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
 # Final stage for app image
 FROM base
 
+<% unless dockerfile_deploy_packages.empty? -%>
 # Install packages needed for deployment
 RUN apt-get update -qq && \
     apt-get install --no-install-recommends -y <%= dockerfile_deploy_packages.join(" ") %> && \
     rm -rf /var/lib/apt/lists /var/cache/apt/archives
 
+<% end -%>
 # Copy built artifacts: gems, application
 COPY --from=build /usr/local/bundle /usr/local/bundle
 COPY --from=build /rails /rails
 
 # Run and own only the runtime files as a non-root user for security
 RUN useradd rails --home /rails --shell /bin/bash && \
-    chown -R rails:rails db log storage tmp
+    chown -R rails:rails <%= dockerfile_chown_directories.join(" ") %>
 USER rails:rails
 
 # Entrypoint prepares the database.

railties/lib/rails/generators/rails/app/templates/docker-entrypoint.tt

@@ -1,8 +1,10 @@
 #!/bin/bash -e
 
+<% unless skip_active_record? -%>
 # If running the rails server then create or migrate existing database
 if [ "${*}" == "./bin/rails server" ]; then
   ./bin/rails db:prepare
 fi
 
+<% end -%>
 exec "${@}"