chore: RuboCop lints Style/S*

.rubocop_todo.yml

@@ -6,7 +6,7 @@
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# Offense count: 41
+# Offense count: 40
 Metrics/AbcSize:
   Max: 86
 
@@ -21,7 +21,7 @@ Metrics/BlockLength:
 Metrics/ClassLength:
   Max: 216
 
-# Offense count: 20
+# Offense count: 19
 Metrics/CyclomaticComplexity:
   Max: 20
 
@@ -35,7 +35,7 @@ Metrics/MethodLength:
 Metrics/ModuleLength:
   Max: 101
 
-# Offense count: 19
+# Offense count: 17
 Metrics/PerceivedComplexity:
   Max: 21
 
@@ -138,14 +138,13 @@ Style/ModuleFunction:
   Exclude:
     - 'lib/faraday/utils.rb'
 
-# Offense count: 6
+# Offense count: 5
 # Cop supports --auto-correct.
 Style/MultilineIfModifier:
   Exclude:
     - 'lib/faraday/adapter/em_http.rb'
     - 'lib/faraday/adapter/em_synchrony.rb'
     - 'lib/faraday/adapter/net_http_persistent.rb'
-    - 'lib/faraday/adapter/rack.rb'
     - 'test/adapters/em_http_test.rb'
     - 'test/helper.rb'
 
@@ -272,50 +271,6 @@ Style/RescueStandardError:
     - 'lib/faraday/adapter/em_synchrony.rb'
     - 'lib/faraday/adapter/httpclient.rb'
 
-# Offense count: 10
-# Cop supports --auto-correct.
-# Configuration parameters: ConvertCodeThatCanStartToReturnNil, Whitelist.
-# Whitelist: present?, blank?, presence, try, try!
-Style/SafeNavigation:
-  Exclude:
-    - 'lib/faraday/adapter.rb'
-    - 'lib/faraday/adapter/httpclient.rb'
-    - 'lib/faraday/adapter/net_http.rb'
-    - 'lib/faraday/adapter/patron.rb'
-    - 'lib/faraday/adapter/rack.rb'
-    - 'lib/faraday/connection.rb'
-    - 'lib/faraday/options/proxy_options.rb'
-
-# Offense count: 9
-# Cop supports --auto-correct.
-# Configuration parameters: AllowIfMethodIsEmpty.
-Style/SingleLineMethods:
-  Exclude:
-    - 'lib/faraday/adapter.rb'
-    - 'lib/faraday/adapter/em_http.rb'
-    - 'lib/faraday/rack_builder.rb'
-    - 'lib/faraday/utils.rb'
-    - 'spec/support/fake_safe_buffer.rb'
-    - 'test/adapters/em_http_test.rb'
-    - 'test/adapters/em_synchrony_test.rb'
-    - 'test/adapters/rack_test.rb'
-
-# Offense count: 6
-# Cop supports --auto-correct.
-# Configuration parameters: .
-# SupportedStyles: use_perl_names, use_english_names
-Style/SpecialGlobalVars:
-  EnforcedStyle: use_perl_names
-
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: single_quotes, double_quotes
-Style/StringLiteralsInInterpolation:
-  Exclude:
-    - 'lib/faraday/options/env.rb'
-    - 'spec/faraday/utils_spec.rb'
-
 # Offense count: 280
 # Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
 # URISchemes: http, https

lib/faraday/adapter.rb

@@ -24,7 +24,9 @@ class Adapter
     # This module marks an Adapter as supporting parallel requests.
     module Parallelism
       attr_writer :supports_parallel
-      def supports_parallel?() @supports_parallel end
+      def supports_parallel?
+        @supports_parallel
+      end
 
       def inherited(subclass)
         super
@@ -51,7 +53,7 @@ def call(env)
     def save_response(env, status, body, headers = nil, reason_phrase = nil)
       env.status = status
       env.body = body
-      env.reason_phrase = reason_phrase && reason_phrase.to_s.strip
+      env.reason_phrase = reason_phrase&.to_s&.strip
       env.response_headers = Utils::Headers.new.tap do |response_headers|
         response_headers.update headers unless headers.nil?
         yield(response_headers) if block_given?

lib/faraday/adapter/em_http.rb

@@ -206,7 +206,9 @@ def reset
         end
 
         # @return [Boolean]
-        def running?() @running end
+        def running?
+          @running
+        end
 
         def add
           if running?

lib/faraday/adapter/em_synchrony.rb

@@ -78,7 +78,7 @@ def call(env)
 
         @app.call env
       rescue Errno::ECONNREFUSED
-        raise Faraday::ConnectionFailed, $!
+        raise Faraday::ConnectionFailed, $ERROR_INFO
       rescue EventMachine::Connectify::CONNECTError => err
         if err.message.include?('Proxy Authentication Required')
           raise Faraday::ConnectionFailed, %(407 "Proxy Authentication Required ")

lib/faraday/adapter/httpclient.rb

@@ -51,15 +51,15 @@ def call(env)
 
         @app.call env
       rescue ::HTTPClient::TimeoutError, Errno::ETIMEDOUT
-        raise Faraday::TimeoutError, $!
+        raise Faraday::TimeoutError, $ERROR_INFO
       rescue ::HTTPClient::BadResponseError => err
         if err.message.include?('status 407')
           raise Faraday::ConnectionFailed, %(407 "Proxy Authentication Required ")
         else
-          raise Faraday::ClientError, $!
+          raise Faraday::ClientError, $ERROR_INFO
         end
       rescue Errno::ECONNREFUSED, IOError, SocketError
-        raise Faraday::ConnectionFailed, $!
+        raise Faraday::ConnectionFailed, $ERROR_INFO
       rescue => err
         if defined?(OpenSSL) && err.is_a?(OpenSSL::SSL::SSLError)
           raise Faraday::SSLError, err
@@ -112,7 +112,7 @@ def configure_timeouts(req)
       end
 
       def configure_client
-        @config_block.call(client) if @config_block
+        @config_block&.call(client)
       end
 
       # @param ssl [Hash]

lib/faraday/adapter/net_http.rb

@@ -163,7 +163,7 @@ def configure_request(http, req)
         # Only set if Net::Http supports it, since Ruby 2.5.
         http.max_retries = 0 if http.respond_to?(:max_retries=)
 
-        @config_block.call(http) if @config_block
+        @config_block&.call(http)
       end
 
       def ssl_cert_store(ssl)

lib/faraday/adapter/patron.rb

@@ -12,7 +12,7 @@ def call(env)
         env[:body] = env[:body].read if env[:body].respond_to? :read
 
         session = ::Patron::Session.new
-        @config_block.call(session) if @config_block
+        @config_block&.call(session)
         configure_ssl(session, env[:ssl]) if (env[:url].scheme == 'https') && env[:ssl]
 
         if (req = env[:request])
@@ -31,7 +31,7 @@ def call(env)
           data = env[:body] ? env[:body].to_s : nil
           session.request(env[:method], env[:url].to_s, env[:request_headers], data: data)
                    rescue Errno::ECONNREFUSED, ::Patron::ConnectionFailed
-                     raise Faraday::ConnectionFailed, $!
+                     raise Faraday::ConnectionFailed, $ERROR_INFO
         end
 
         if (req = env[:request]).stream_response?

lib/faraday/adapter/rack.rb

@@ -35,11 +35,11 @@ def call(env)
           'rack.url_scheme' => env[:url].scheme
         }
 
-        env[:request_headers].each do |name, value|
+        env[:request_headers]&.each do |name, value|
           name = name.upcase.tr('-', '_')
           name = "HTTP_#{name}" unless SPECIAL_HEADERS.include? name
           rack_env[name] = value
-        end if env[:request_headers]
+        end
 
         timeout  = env[:request][:timeout] || env[:request][:open_timeout]
         response = if timeout

lib/faraday/connection.rb

@@ -344,7 +344,7 @@ def default_parallel_manager
       @default_parallel_manager ||= begin
         adapter = @builder.adapter.klass if @builder.adapter
 
-        if adapter && adapter.respond_to?(:supports_parallel?) && adapter.supports_parallel?
+        if adapter&.respond_to?(:supports_parallel?) && adapter&.supports_parallel?
           adapter.setup_parallel_manager
         elsif block_given?
           yield
@@ -372,7 +372,7 @@ def in_parallel(manager = nil)
         nil
       end
       yield
-      @parallel_manager && @parallel_manager.run
+      @parallel_manager&.run
     ensure
       @parallel_manager = nil
     end
@@ -512,7 +512,7 @@ def build_exclusive_url(url = nil, params = nil, params_encoder = nil)
       end
       uri = url ? base + url : base
       uri.query = params.to_query(params_encoder || options.params_encoder) if params
-      uri.query = nil if uri.query && uri.query.empty?
+      uri.query = nil if uri.query&.empty?
       uri
     end
 

lib/faraday/options/env.rb

@@ -152,7 +152,7 @@ def inspect
       unless custom_members.empty?
         attrs << "@custom=#{custom_members.inspect}"
       end
-      %(#<#{self.class}#{attrs.join(" ")}>)
+      %(#<#{self.class}#{attrs.join(' ')}>)
     end
 
     # @private

lib/faraday/options/proxy_options.rb

@@ -19,7 +19,7 @@ def self.from(value)
       super(value)
     end
 
-    memoized(:user) { uri && uri.user && Utils.unescape(uri.user) }
-    memoized(:password) { uri && uri.password && Utils.unescape(uri.password) }
+    memoized(:user) { uri&.user && Utils.unescape(uri.user) }
+    memoized(:password) { uri&.password && Utils.unescape(uri.password) }
   end
 end

lib/faraday/rack_builder.rb

@@ -36,9 +36,13 @@ def initialize(klass, *args, &block)
         @args, @block = args, block
       end
 
-      def klass() @@constants[@name] end
+      def klass
+        @@constants[@name]
+      end
 
-      def inspect() @name end
+      def inspect
+        @name
+      end
 
       def ==(other)
         if other.is_a? Handler

lib/faraday/utils.rb

@@ -23,7 +23,9 @@ def escape(str)
       end.tr(' ', '+')
     end
 
-    def unescape(str) CGI.unescape str.to_s end
+    def unescape(str)
+      CGI.unescape str.to_s
+    end
 
     DEFAULT_SEP = /[&;] */n
 

spec/faraday/utils_spec.rb

@@ -40,7 +40,7 @@
     end
 
     it 'parses with block' do
-      with_default_uri_parser(->(u) { "booya#{"!" * u.size}" }) do
+      with_default_uri_parser(->(u) { "booya#{'!' * u.size}" }) do
         expect(normalize(url)).to eq('booya!!!!!!!!!!!!!!!!!!!!!!')
       end
     end

spec/support/fake_safe_buffer.rb

@@ -2,7 +2,9 @@
 
 # emulates ActiveSupport::SafeBuffer#gsub
 FakeSafeBuffer = Struct.new(:string) do
-  def to_s; self end
+  def to_s
+    self
+  end
 
   def gsub(regex)
     string.gsub(regex) do

test/adapters/em_http_test.rb

@@ -4,7 +4,9 @@
 
 module Adapters
   class EMHttpTest < Faraday::TestCase
-    def adapter() :em_http end
+    def adapter
+      :em_http
+    end
 
     Integration.apply(self, :Parallel, :NonStreaming, :ParallelNonStreaming) do
       # https://github.com/eventmachine/eventmachine/pull/289

test/adapters/em_synchrony_test.rb

@@ -4,7 +4,9 @@
 
 module Adapters
   class EMSynchronyTest < Faraday::TestCase
-    def adapter() :em_synchrony end
+    def adapter
+      :em_synchrony
+    end
 
     unless jruby?
       Integration.apply(self, :Parallel, :NonStreaming, :ParallelNonStreaming) do

test/adapters/rack_test.rb

@@ -5,7 +5,9 @@
 
 module Adapters
   class RackTest < Faraday::TestCase
-    def adapter() :rack end
+    def adapter
+      :rack
+    end
 
     def adapter_options
       [Faraday::LiveServer]

test/live_server.rb

@@ -81,6 +81,6 @@ class LiveServer < Sinatra::Base
   end
 end
 
-if $0 == __FILE__
+if $PROGRAM_NAME == __FILE__
   Faraday::LiveServer.run!
 end