Add Devise compiler

Gemfile

@@ -11,6 +11,7 @@ group :development do
   gem "minitest-reporters"
 
   gem "attr_json"
+  gem "devise"
   gem "kaminari-activerecord"
   gem "money-rails"
   gem "paperclip"

Gemfile.lock

@@ -83,6 +83,7 @@ GEM
     attr_json (2.5.0)
       activerecord (>= 6.0.0, < 8.1)
     base64 (0.2.0)
+    bcrypt (3.1.20)
     benchmark (0.4.0)
     bigdecimal (3.1.8)
     builder (3.3.0)
@@ -91,6 +92,12 @@ GEM
     connection_pool (2.4.1)
     crass (1.0.6)
     date (3.3.4)
+    devise (4.9.4)
+      bcrypt (~> 3.0)
+      orm_adapter (~> 0.1)
+      railties (>= 4.1.0)
+      responders
+      warden (~> 1.2.3)
     drb (2.2.1)
     erubi (1.13.1)
     globalid (1.2.1)
@@ -157,6 +164,7 @@ GEM
     nokogiri (1.16.7)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
+    orm_adapter (0.5.0)
     paperclip (6.1.0)
       activemodel (>= 4.2.0)
       activesupport (>= 4.2.0)
@@ -218,6 +226,9 @@ GEM
     regexp_parser (2.9.2)
     reline (0.5.10)
       io-console (~> 0.5)
+    responders (3.1.1)
+      actionpack (>= 5.2)
+      railties (>= 5.2)
     rexml (3.3.9)
     rubocop (1.65.1)
       json (~> 2.3)
@@ -275,6 +286,8 @@ GEM
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.5.0)
     useragent (0.16.10)
+    warden (1.2.9)
+      rack (>= 2.0.9)
     webrick (1.8.1)
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
@@ -292,6 +305,7 @@ PLATFORMS
 DEPENDENCIES
   attr_json
   boba!
+  devise
   kaminari-activerecord
   minitest
   minitest-hooks

lib/tapioca/dsl/compilers/devise.rb

@@ -0,0 +1,66 @@
+# typed: true
+# frozen_string_literal: true
+
+return unless defined?(Devise)
+
+module Tapioca
+  module Dsl
+    module Compilers
+      # `Tapioca::Dsl::Compilers::Devise` generates RBI files for `ApplicationController`
+      #
+      # For example, with the following routes configuration:
+      #
+      # ~~~rb
+      # Rails.application.routes.draw do
+      #   devise_for :users
+      # end
+      # ~~~
+      #
+      # this compiler will produce the RBI file `user.rbi` with the following content:
+      #
+      # ~~~rbi
+      # # user.rbi
+      # # typed: true
+      # class ApplicationController
+      #   sig { returns(T.nilable(T::Hash[T.untyped, T.untyped])) }
+      #   def user_session; end
+      #
+      #   sig { returns(T::Boolean) }
+      #   def user_signed_in?; end
+      #
+      #   sig { void }
+      #   def authenticate_user!; end
+      #
+      #   sig { returns(T.nilable(User)) }
+      #   def current_user; end
+      # end
+      # ~~~
+      class Devise < Tapioca::Dsl::Compiler
+        extend T::Sig
+
+        ConstantType = type_member { { upper: ActiveRecord::Base } }
+
+        class << self
+          extend T::Sig
+
+          sig { override.returns(T::Enumerable[Module]) }
+          def gather_constants
+            ::Devise.mappings.values.map(&:class_name).map(&:constantize)
+          end
+        end
+
+        sig { override.void }
+        def decorate
+          ::Devise.mappings.each do |key, mapping|
+            root.create_path(ApplicationController) do |klass|
+              klass.create_method("current_#{key}", return_type: "T.nilable(#{mapping.class_name})")
+              klass.create_method("authenticate_#{key}!", return_type: "void")
+              klass.create_method("#{key}_session", return_type: "T.nilable(T::Hash[T.untyped, T.untyped])")
+              klass.create_method("#{key}_signed_in?", return_type: "T::Boolean")
+            end
+          end
+        end
+      end
+    end
+  end
+end

manual/compiler_devise.md

@@ -0,0 +1,31 @@
+## Devise
+
+`Tapioca::Dsl::Compilers::Devise` generates RBI files for `ApplicationController`
+
+For example, with the following routes configuration:
+
+~~~rb
+Rails.application.routes.draw do
+  devise_for :users
+end
+~~~
+
+this compiler will produce the RBI file `user.rbi` with the following content:
+
+~~~rbi
+# user.rbi
+# typed: true
+class ApplicationController
+  sig { returns(T.nilable(T::Hash[T.untyped, T.untyped])) }
+  def user_session; end
+
+  sig { returns(T::Boolean) }
+  def user_signed_in?; end
+
+  sig { void }
+  def authenticate_user!; end
+
+  sig { returns(T.nilable(User)) }
+  def current_user; end
+end
+~~~

manual/compilers.md

@@ -8,6 +8,7 @@ This list is an evergeen list of currently available compilers.
 * [ActiveRecordAssociationsPersisted](compiler_activerecordassociationspersisted.md)
 * [ActiveRecordColumnsPersisted](compiler_activerecordcolumnspersisted.md)
 * [AttrJson](compiler_attrjson.md)
+* [Devise](compiler_devise.md)
 * [Kaminari](compiler_kaminari.md)
 * [MoneyRails](compiler_moneyrails.md)
 * [Paperclip](compiler_paperclip.md)