Add routes generator

.gitignore

@@ -23,3 +23,4 @@
 .ruby-gemset
 
 .env
+/spec/tmp/config/routes.rb

.rubocop.yml

@@ -5,7 +5,7 @@ Rails:
   Enabled: true
 
 AllCops:
-  TargetRubyVersion: 2.2
+  TargetRubyVersion: 2.3
   DisplayCopNames: true
   Exclude:
     - bin/**/*

graphql_devise.gemspec

@@ -41,4 +41,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rubocop-rspec'
   spec.add_development_dependency 'sqlite3', '~> 1.3'
   spec.add_development_dependency 'github_changelog_generator'
+  spec.add_development_dependency 'generator_spec'
 end

lib/generators/graphql_devise/install_generator.rb

@@ -0,0 +1,60 @@
+module GraphqlDevise
+  class InstallGenerator < ::Rails::Generators::Base
+    source_root File.expand_path('templates', __dir__)
+
+    argument :user_class, type: :string, default: 'User'
+    argument :mount_path, type: :string, default: 'auth'
+
+    def mount_resource_route
+      f           = 'config/routes.rb'
+      str         = "mount_graphql_devise_for '#{user_class}', at: '#{mount_path}'"
+      routes_file = File.join(destination_root, f)
+
+      if File.exist?(routes_file)
+        line = parse_file_for_line(f, 'mount_graphql_devise_for')
+
+        if line
+          existing_user_class = true
+        else
+          line = 'Rails.application.routes.draw do'
+          existing_user_class = false
+        end
+
+        if parse_file_for_line(f, str)
+          say_status('skipped', "Routes already exist for #{user_class} at #{mount_path}")
+        else
+          insert_text_after_line(f, line, str)
+
+          if existing_user_class
+            scoped_routes = ''\
+              "as :#{user_class.underscore} do\n"\
+              "    # Define routes for #{user_class} within this block.\n"\
+              "  end\n"
+            insert_text_after_line(f, str, scoped_routes)
+          end
+        end
+      else
+        say_status('skipped', "config/routes.rb not found. Add \"mount_graphql_devise_for '#{user_class}', at: '#{mount_path}'\" to your routes file.")
+      end
+    end
+
+    private
+
+    def insert_text_after_line(filename, line, str)
+      gsub_file filename, /(#{Regexp.escape(line)})/mi do |match|
+        "#{match}\n  #{str}"
+      end
+    end
+
+    def parse_file_for_line(filename, str)
+      match = false
+
+      File.open(File.join(destination_root, filename)) do |f|
+        f.each_line do |line|
+          match = line if line =~ /(#{Regexp.escape(str)})/mi
+        end
+      end
+      match
+    end
+  end
+end

spec/generators/graphql_devise/install_generator_spec.rb

@@ -0,0 +1,28 @@
+# Generators are not automatically loaded by Rails
+require 'rails_helper'
+require 'fileutils'
+require 'generators/graphql_devise/install_generator'
+
+RSpec.describe GraphqlDevise::InstallGenerator, type: :generator do
+  destination File.expand_path("../../../tmp", __FILE__)
+  arguments %w(User auth)
+
+  before do
+    prepare_destination
+    FileUtils::mkdir(config_path)
+    File.open(routes_path, "w") do |f|
+      f.write('Rails.application.routes.draw do')
+      f.write("\nend")
+    end
+    run_generator
+  end
+
+  let(:config_path) { "#{destination_root}/config" }
+  let(:routes_path) { "#{config_path}/routes.rb" }
+  let(:routes_content) { File.read(routes_path) }
+
+  it 'add the routes to config/routes.rb' do
+    generator_added_route = /  mount_graphql_devise_for 'User', at: 'auth'/
+    expect(routes_content).to match(generator_added_route)
+  end
+end

spec/rails_helper.rb

@@ -10,6 +10,7 @@
 # Add additional requires below this line. Rails is not loaded until this point!
 require 'factory_bot'
 require 'faker'
+require 'generator_spec'
 
 # Load RSpec helpers.
 Dir[File.join(ENGINE_ROOT, 'spec/support/**/*.rb')].each { |f| require f }