Switch to Ruby-2.x+ syntax

.rubocop.yml

@@ -1,4 +1,5 @@
 AllCops:
+  TargetRubyVersion: 2.1
   Include:
     - Dangerfile
     - gemfiles/*.gemfile

CHANGELOG.md

@@ -4,6 +4,7 @@
 * [#1480](https://github.com/ruby-grape/grape/pull/1480): Use the ruby-grape-danger gem for PR linting - [@dblock](https://github.com/dblock).
 * [#1486](https://github.com/ruby-grape/grape/pull/1486): Implemented except in values validator - [@jonmchan](https://github.com/jonmchan).
 * [#1470](https://github.com/ruby-grape/grape/pull/1470): Drop support for ruby-2.0 - [@namusyaka](https://github.com/namusyaka).
+* [#1490](https://github.com/ruby-grape/grape/pull/1490): Switch to Ruby-2.x+ syntax - [@namusyaka](https://github.com/namusyaka).
 * Your contribution here.
 
 #### Fixes

lib/grape/api.rb

@@ -194,13 +194,13 @@ def add_head_not_allowed_methods_and_options_methods
 
     # Generate a route that returns an HTTP 405 response for a user defined
     # path on methods not specified
-    def generate_not_allowed_method(pattern, attributes = {})
-      not_allowed_methods = %w(GET PUT POST DELETE PATCH HEAD) - attributes[:allowed_methods]
+    def generate_not_allowed_method(pattern, allowed_methods: [], **attributes)
+      not_allowed_methods = %w(GET PUT POST DELETE PATCH HEAD) - allowed_methods
       not_allowed_methods << Grape::Http::Headers::OPTIONS if self.class.namespace_inheritable(:do_not_route_options)
 
       return if not_allowed_methods.empty?
 
-      @router.associate_routes(pattern, attributes.merge(not_allowed_methods: not_allowed_methods))
+      @router.associate_routes(pattern, not_allowed_methods: not_allowed_methods, **attributes)
     end
 
     # Allows definition of endpoints that ignore the versioning configuration

lib/grape/cookies.rb

@@ -31,7 +31,7 @@ def each(&block)
       @cookies.each(&block)
     end
 
-    def delete(name, opts = {})
+    def delete(name, **opts)
       options = opts.merge(value: 'deleted', expires: Time.at(0))
       self.[]=(name, options)
     end

lib/grape/dsl/inside_route.rb

@@ -97,9 +97,8 @@ def error!(message, status = nil, headers = nil)
       # @param options [Hash] The options used when redirect.
       #                       :permanent, default false.
       #                       :body, default a short message including the URL.
-      def redirect(url, options = {})
-        permanent = options.fetch(:permanent, false)
-        body_message = options.fetch(:body, nil)
+      def redirect(url, permanent: false, body: nil, **_options)
+        body_message = body
         if permanent
           status 301
           body_message ||= "This resource has been moved permanently to #{url}."

lib/grape/dsl/request_response.rb

@@ -88,7 +88,7 @@ def default_error_status(new_status = nil)
         #       rescue_from CustomError
         #     end
         #
-        # @overload rescue_from(*exception_classes, options = {})
+        # @overload rescue_from(*exception_classes, **options)
         #   @param [Array] exception_classes A list of classes that you want to rescue, or
         #     the symbol :all to rescue from all exceptions.
         #   @param [Block] block Execution block to handle the given exception.

lib/grape/endpoint.rb

@@ -194,8 +194,8 @@ def prepare_version
       version.length == 1 ? version.first.to_s : version
     end
 
-    def merge_route_options(default = {})
-      options[:route_options].clone.reverse_merge(default)
+    def merge_route_options(**default)
+      options[:route_options].clone.reverse_merge(**default)
     end
 
     def map_routes

lib/grape/error_formatter.rb

@@ -17,8 +17,8 @@ def formatters(options)
         builtin_formatters.merge(default_elements).merge(options[:error_formatters] || {})
       end
 
-      def formatter_for(api_format, options = {})
-        spec = formatters(options)[api_format]
+      def formatter_for(api_format, **options)
+        spec = formatters(**options)[api_format]
         case spec
         when nil
           options[:default_error_formatter] || Grape::ErrorFormatter::Txt

lib/grape/exceptions/base.rb

@@ -7,10 +7,10 @@ class Base < StandardError
 
       attr_reader :status, :message, :headers
 
-      def initialize(args = {})
-        @status = args[:status] || nil
-        @message = args[:message] || nil
-        @headers = args[:headers] || nil
+      def initialize(status: nil, message: nil, headers: nil, **_options)
+        @status  = status
+        @message = message
+        @headers = headers
       end
 
       def [](index)
@@ -22,12 +22,12 @@ def [](index)
       # TODO: translate attribute first
       # if BASE_ATTRIBUTES_KEY.key respond to a string message, then short_message is returned
       # if BASE_ATTRIBUTES_KEY.key respond to a Hash, means it may have problem , summary and resolution
-      def compose_message(key, attributes = {})
-        short_message = translate_message(key, attributes)
+      def compose_message(key, **attributes)
+        short_message = translate_message(key, **attributes)
         if short_message.is_a? Hash
-          @problem = problem(key, attributes)
-          @summary = summary(key, attributes)
-          @resolution = resolution(key, attributes)
+          @problem = problem(key, **attributes)
+          @summary = summary(key, **attributes)
+          @resolution = resolution(key, **attributes)
           [['Problem', @problem], ['Summary', @summary], ['Resolution', @resolution]].reduce('') do |message, detail_array|
             message << "\n#{detail_array[0]}:\n  #{detail_array[1]}" unless detail_array[1].blank?
             message
@@ -49,30 +49,30 @@ def resolution(key, attributes)
         translate_message("#{key}.resolution".to_sym, attributes)
       end
 
-      def translate_attributes(keys, options = {})
+      def translate_attributes(keys, **options)
         keys.map do |key|
-          translate("#{BASE_ATTRIBUTES_KEY}.#{key}", options.reverse_merge(default: key))
+          translate("#{BASE_ATTRIBUTES_KEY}.#{key}", default: key, **options)
         end.join(', ')
       end
 
-      def translate_attribute(key, options = {})
-        translate("#{BASE_ATTRIBUTES_KEY}.#{key}", options.reverse_merge(default: key))
+      def translate_attribute(key, **options)
+        translate("#{BASE_ATTRIBUTES_KEY}.#{key}", default: key, **options)
       end
 
-      def translate_message(key, options = {})
+      def translate_message(key, **options)
         case key
         when Symbol
-          translate("#{BASE_MESSAGES_KEY}.#{key}", options.reverse_merge(default: ''))
+          translate("#{BASE_MESSAGES_KEY}.#{key}", default: '', **options)
         when Proc
           key.call
         else
           key
         end
       end
 
-      def translate(key, options = {})
-        message = ::I18n.translate(key, options)
-        message.present? ? message : ::I18n.translate(key, options.merge(locale: FALLBACK_LOCALE))
+      def translate(key, **options)
+        message = ::I18n.translate(key, **options)
+        message.present? ? message : ::I18n.translate(key, locale: FALLBACK_LOCALE, **options)
       end
     end
   end

lib/grape/exceptions/validation.rb

@@ -6,14 +6,13 @@ class Validation < Grape::Exceptions::Base
       attr_accessor :params
       attr_accessor :message_key
 
-      def initialize(args = {})
-        raise 'Params are missing:' unless args.key? :params
-        @params = args[:params]
-        if args.key?(:message)
-          @message_key = args[:message] if args[:message].is_a?(Symbol)
-          args[:message] = translate_message(args[:message])
+      def initialize(params:, message: nil, **args)
+        @params = params
+        if message
+          @message_key = message if message.is_a?(Symbol)
+          args[:message] = translate_message(message)
         end
-        super
+        super(args)
       end
 
       # remove all the unnecessary stuff from Grape::Exceptions::Base like status

lib/grape/exceptions/validation_errors.rb

@@ -7,14 +7,14 @@ class ValidationErrors < Grape::Exceptions::Base
 
       attr_reader :errors
 
-      def initialize(args = {})
+      def initialize(errors: [], headers: {}, **_options)
         @errors = {}
-        args[:errors].each do |validation_error|
+        errors.each do |validation_error|
           @errors[validation_error.params] ||= []
           @errors[validation_error.params] << validation_error
         end
 
-        super message: full_messages.join(', '), status: 400, headers: args[:headers]
+        super message: full_messages.join(', '), status: 400, headers: headers
       end
 
       def each
@@ -25,7 +25,7 @@ def each
         end
       end
 
-      def as_json(_opts = {})
+      def as_json(**_opts)
         errors.map do |k, v|
           {
             params: k,
@@ -34,7 +34,7 @@ def as_json(_opts = {})
         end
       end
 
-      def to_json(_opts = {})
+      def to_json(**_opts)
         as_json.to_json
       end
 

lib/grape/formatter.rb

@@ -17,8 +17,8 @@ def formatters(options)
         builtin_formmaters.merge(default_elements).merge(options[:formatters] || {})
       end
 
-      def formatter_for(api_format, options = {})
-        spec = formatters(options)[api_format]
+      def formatter_for(api_format, **options)
+        spec = formatters(**options)[api_format]
         case spec
         when nil
           ->(obj, _env) { obj }

lib/grape/middleware/auth/base.rb

@@ -6,9 +6,9 @@ module Auth
       class Base
         attr_accessor :options, :app, :env
 
-        def initialize(app, options = {})
+        def initialize(app, **options)
           @app = app
-          @options = options || {}
+          @options = options
         end
 
         def context

lib/grape/middleware/base.rb

@@ -10,9 +10,9 @@ class Base
 
       # @param [Rack Application] app The standard argument for a Rack middleware.
       # @param [Hash] options A hash of options, simply stored for use by subclasses.
-      def initialize(app, options = {})
+      def initialize(app, **options)
         @app = app
-        @options = default_options.merge(options)
+        @options = default_options.merge(**options)
       end
 
       def default_options

lib/grape/middleware/error.rb

@@ -21,7 +21,7 @@ def default_options
         }
       end
 
-      def initialize(app, options = {})
+      def initialize(app, **options)
         super
         self.class.send(:include, @options[:helpers]) if @options[:helpers]
       end

lib/grape/namespace.rb

@@ -10,7 +10,7 @@ class Namespace
     # @option options :requirements [Hash] param-regex pairs, all of which must
     #   be met by a request's params for all endpoints in this namespace, or
     #   validation will fail and return a 422.
-    def initialize(space, options = {})
+    def initialize(space, **options)
       @space = space.to_s
       @options = options
     end

lib/grape/parser.rb

@@ -15,8 +15,8 @@ def parsers(options)
         builtin_parsers.merge(default_elements).merge(options[:parsers] || {})
       end
 
-      def parser_for(api_format, options = {})
-        spec = parsers(options)[api_format]
+      def parser_for(api_format, **options)
+        spec = parsers(**options)[api_format]
         case spec
         when nil
           nil

lib/grape/presenters/presenter.rb

@@ -1,7 +1,7 @@
 module Grape
   module Presenters
     class Presenter
-      def self.represent(object, _options = {})
+      def self.represent(object, **_options)
         object
       end
     end

lib/grape/router.rb

@@ -5,7 +5,7 @@ class Router
     attr_reader :map, :compiled
 
     class Any < AttributeTranslator
-      def initialize(pattern, attributes = {})
+      def initialize(pattern, **attributes)
         @pattern = pattern
         super(attributes)
       end
@@ -42,9 +42,9 @@ def append(route)
       map[route.request_method.to_s.upcase] << route
     end
 
-    def associate_routes(pattern, options = {})
+    def associate_routes(pattern, **options)
       regexp = /(?<_#{@neutral_map.length}>)#{pattern.to_regexp}/
-      @neutral_map << Any.new(pattern, options.merge(regexp: regexp, index: @neutral_map.length))
+      @neutral_map << Any.new(pattern, regexp: regexp, index: @neutral_map.length, **options)
     end
 
     def call(env)

lib/grape/router/pattern.rb

@@ -14,9 +14,9 @@ class Pattern
       def_delegators :@regexp, :===
       alias match? ===
 
-      def initialize(pattern, options = {})
+      def initialize(pattern, **options)
         @origin  = pattern
-        @path    = build_path(pattern, options)
+        @path    = build_path(pattern, **options)
         @capture = extract_capture(options)
         @pattern = Mustermann.new(@path, pattern_options)
         @regexp  = to_regexp
@@ -34,13 +34,13 @@ def pattern_options
         options
       end
 
-      def build_path(pattern, options = {})
-        pattern << '*path' unless options[:anchor] || pattern.end_with?('*path')
-        pattern + options[:suffix].to_s
+      def build_path(pattern, anchor: false, suffix: nil, **_options)
+        pattern << '*path' unless anchor || pattern.end_with?('*path')
+        pattern + suffix.to_s
       end
 
-      def extract_capture(options = {})
-        requirements = {}.merge(options[:requirements])
+      def extract_capture(requirements: {}, **options)
+        requirements = {}.merge(requirements)
         supported_capture.each_with_object(requirements) do |field, capture|
           option = Array(options[field])
           capture[field] = option.map(&:to_s) if option.present?

lib/grape/router/route.rb

@@ -57,11 +57,11 @@ def route_path
         pattern.path
       end
 
-      def initialize(method, pattern, options = {})
+      def initialize(method, pattern, **options)
         @suffix     = options[:suffix]
         @options    = options.merge(method: method.to_s.upcase)
-        @pattern    = Pattern.new(pattern, options)
-        @translator = AttributeTranslator.new(options.merge(request_method: method.to_s.upcase))
+        @pattern    = Pattern.new(pattern, **options)
+        @translator = AttributeTranslator.new(**options, request_method: method.to_s.upcase)
       end
 
       def exec(env)

spec/grape/exceptions/validation_spec.rb

@@ -2,7 +2,7 @@
 
 describe Grape::Exceptions::Validation do
   it 'fails when params are missing' do
-    expect { Grape::Exceptions::Validation.new(message: 'presence') }.to raise_error(RuntimeError, 'Params are missing:')
+    expect { Grape::Exceptions::Validation.new(message: 'presence') }.to raise_error(ArgumentError, 'missing keyword: params')
   end
   context 'when message is a symbol' do
     it 'stores message_key' do