Autofixing new Perf cops in 0.37.2

   6 Performance/Casecmp
  18 Performance/Detect
   1 Performance/RangeInclude
  27 Performance/RedundantBlockCall
   6 Performance/RedundantMatch
   5 Performance/RedundantMerge
  18 Performance/StringReplacement

63 files changed, 77 insertions, 75 deletions

diff --git a/Gemfile b/Gemfile
index 2c37e6c7d4..2d0a7338ea 100644
--- a/Gemfile
+++ b/Gemfile
@@ -30,7 +30,7 @@ group(:development, :test) do
   # gem 'chefstyle', github: 'chef/chefstyle'
   gem "chefstyle", git: "https://github.com/chef/chefstyle.git", branch: "master"
 
-  gem "ruby-shadow", platforms: :ruby unless RUBY_PLATFORM.downcase.match(/(aix|cygwin)/)
+  gem "ruby-shadow", platforms: :ruby unless RUBY_PLATFORM.downcase =~ /(aix|cygwin)/
 
   # For external tests
   #  gem 'chef-zero', github: 'chef/chef-zero'
diff --git a/chef-config/lib/chef-config/package_task.rb b/chef-config/lib/chef-config/package_task.rb
index 4f75af9c6c..1860335854 100644
--- a/chef-config/lib/chef-config/package_task.rb
+++ b/chef-config/lib/chef-config/package_task.rb
@@ -99,7 +99,7 @@ module ChefConfig
       if defined?(Bundler)
         Bundler.with_clean_env(&block)
       else
-        block.call
+        yield
       end
     end
 
diff --git a/lib/chef/application/client.rb b/lib/chef/application/client.rb
index 9ec553fb8a..79cb046919 100644
--- a/lib/chef/application/client.rb
+++ b/lib/chef/application/client.rb
@@ -263,7 +263,7 @@ class Chef::Application::Client < Chef::Application
   option :audit_mode,
     :long           => "--audit-mode MODE",
     :description    => "Enable audit-mode with `enabled`. Disable audit-mode with `disabled`. Skip converge and only perform audits with `audit-only`",
-    :proc           => lambda { |mo| mo.gsub("-", "_").to_sym }
+    :proc           => lambda { |mo| mo.tr("-", "_").to_sym }
 
   option :minimal_ohai,
     :long           => "--minimal-ohai",
diff --git a/lib/chef/chef_fs/data_handler/container_data_handler.rb b/lib/chef/chef_fs/data_handler/container_data_handler.rb
index a2e277fc7a..6e578e53d6 100644
--- a/lib/chef/chef_fs/data_handler/container_data_handler.rb
+++ b/lib/chef/chef_fs/data_handler/container_data_handler.rb
@@ -18,7 +18,7 @@ class Chef
         def verify_integrity(object, entry, &on_error)
           base_name = remove_dot_json(entry.name)
           if object["containername"] != base_name
-            on_error.call("Name in #{entry.path_for_printing} must be '#{base_name}' (is '#{object['name']}')")
+            yield("Name in #{entry.path_for_printing} must be '#{base_name}' (is '#{object['name']}')")
           end
         end
 
diff --git a/lib/chef/chef_fs/data_handler/data_bag_item_data_handler.rb b/lib/chef/chef_fs/data_handler/data_bag_item_data_handler.rb
index 8ac9a520a4..3b609fad4e 100644
--- a/lib/chef/chef_fs/data_handler/data_bag_item_data_handler.rb
+++ b/lib/chef/chef_fs/data_handler/data_bag_item_data_handler.rb
@@ -45,7 +45,7 @@ class Chef
         def verify_integrity(object, entry, &on_error)
           base_name = remove_dot_json(entry.name)
           if object["raw_data"]["id"] != base_name
-            on_error.call("ID in #{entry.path_for_printing} must be '#{base_name}' (is '#{object['raw_data']['id']}')")
+            yield("ID in #{entry.path_for_printing} must be '#{base_name}' (is '#{object['raw_data']['id']}')")
           end
         end
 
diff --git a/lib/chef/chef_fs/data_handler/data_handler_base.rb b/lib/chef/chef_fs/data_handler/data_handler_base.rb
index 83f56ed16d..93d54e3bee 100644
--- a/lib/chef/chef_fs/data_handler/data_handler_base.rb
+++ b/lib/chef/chef_fs/data_handler/data_handler_base.rb
@@ -192,7 +192,7 @@ class Chef
         def verify_integrity(object, entry, &on_error)
           base_name = remove_dot_json(entry.name)
           if object["name"] != base_name
-            on_error.call("Name must be '#{base_name}' (is '#{object['name']}')")
+            yield("Name must be '#{base_name}' (is '#{object['name']}')")
           end
         end
 
diff --git a/lib/chef/chef_fs/data_handler/organization_data_handler.rb b/lib/chef/chef_fs/data_handler/organization_data_handler.rb
index 3e5528cc49..d61e4f454a 100644
--- a/lib/chef/chef_fs/data_handler/organization_data_handler.rb
+++ b/lib/chef/chef_fs/data_handler/organization_data_handler.rb
@@ -21,7 +21,7 @@ class Chef
 
         def verify_integrity(object, entry, &on_error)
           if entry.org != object["name"]
-            on_error.call("Name must be '#{entry.org}' (is '#{object['name']}')")
+            yield("Name must be '#{entry.org}' (is '#{object['name']}')")
           end
         end
       end
diff --git a/lib/chef/chef_fs/data_handler/policy_data_handler.rb b/lib/chef/chef_fs/data_handler/policy_data_handler.rb
index 477d2bf637..47f534bfc9 100644
--- a/lib/chef/chef_fs/data_handler/policy_data_handler.rb
+++ b/lib/chef/chef_fs/data_handler/policy_data_handler.rb
@@ -29,11 +29,11 @@ class Chef
         def verify_integrity(object_data, entry, &on_error)
           name, revision = name_and_revision(entry.name)
           if object_data["name"] != name
-            on_error.call("Object name '#{object_data['name']}' doesn't match entry '#{entry.name}'.")
+            yield("Object name '#{object_data['name']}' doesn't match entry '#{entry.name}'.")
           end
 
           if object_data["revision_id"] != revision
-            on_error.call("Object revision ID '#{object_data['revision']}' doesn't match entry '#{entry.name}'.")
+            yield("Object revision ID '#{object_data['revision']}' doesn't match entry '#{entry.name}'.")
           end
         end
       end
diff --git a/lib/chef/chef_fs/data_handler/policy_group_data_handler.rb b/lib/chef/chef_fs/data_handler/policy_group_data_handler.rb
index e5c430ab64..d3bdd81e25 100644
--- a/lib/chef/chef_fs/data_handler/policy_group_data_handler.rb
+++ b/lib/chef/chef_fs/data_handler/policy_group_data_handler.rb
@@ -17,7 +17,7 @@ class Chef
 
         def verify_integrity(object_data, entry, &on_error)
           if object_data["policies"].empty?
-            on_error.call("Policy group #{object_data["name"]} does not have any policies in it.")
+            yield("Policy group #{object_data["name"]} does not have any policies in it.")
           end
         end
 
diff --git a/lib/chef/chef_fs/file_system.rb b/lib/chef/chef_fs/file_system.rb
index 415556300c..e6cf735971 100644
--- a/lib/chef/chef_fs/file_system.rb
+++ b/lib/chef/chef_fs/file_system.rb
@@ -55,7 +55,7 @@ class Chef
         def list_from(entry, &block)
           # Include self in results if it matches
           if pattern.match?(entry.path)
-            block.call(entry)
+            yield(entry)
           end
 
           if pattern.could_match_children?(entry.path)
diff --git a/lib/chef/chef_fs/file_system/chef_server/acl_dir.rb b/lib/chef/chef_fs/file_system/chef_server/acl_dir.rb
index 9943aaeca7..58a32d3860 100644
--- a/lib/chef/chef_fs/file_system/chef_server/acl_dir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/acl_dir.rb
@@ -30,7 +30,7 @@ class Chef
           end
 
           def make_child_entry(name, exists = nil)
-            result = @children.select { |child| child.name == name }.first if @children
+            result = @children.find { |child| child.name == name } if @children
             result || AclEntry.new(name, self, exists)
           end
 
diff --git a/lib/chef/chef_fs/file_system/chef_server/acls_dir.rb b/lib/chef/chef_fs/file_system/chef_server/acls_dir.rb
index d03164023f..b9af486203 100644
--- a/lib/chef/chef_fs/file_system/chef_server/acls_dir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/acls_dir.rb
@@ -39,7 +39,7 @@ class Chef
           end
 
           def make_child_entry(name)
-            children.select { |child| child.name == name }.first
+            children.find { |child| child.name == name }
           end
 
           def can_have_child?(name, is_dir)
diff --git a/lib/chef/chef_fs/file_system/chef_server/chef_server_root_dir.rb b/lib/chef/chef_fs/file_system/chef_server/chef_server_root_dir.rb
index 6c99d6de73..5030a0733f 100644
--- a/lib/chef/chef_fs/file_system/chef_server/chef_server_root_dir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/chef_server_root_dir.rb
@@ -119,7 +119,7 @@ class Chef
           end
 
           def can_have_child?(name, is_dir)
-            result = children.select { |child| child.name == name }.first
+            result = children.find { |child| child.name == name }
             result && !!result.dir? == !!is_dir
           end
 
@@ -136,7 +136,7 @@ class Chef
           end
 
           def make_child_entry(name)
-            children.select { |child| child.name == name }.first
+            children.find { |child| child.name == name }
           end
 
           def children
diff --git a/lib/chef/chef_fs/file_system/chef_server/cookbook_artifacts_dir.rb b/lib/chef/chef_fs/file_system/chef_server/cookbook_artifacts_dir.rb
index 020f8510b7..0b82a64a0a 100644
--- a/lib/chef/chef_fs/file_system/chef_server/cookbook_artifacts_dir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/cookbook_artifacts_dir.rb
@@ -35,7 +35,7 @@ class Chef
         class CookbookArtifactsDir < CookbooksDir
 
           def make_child_entry(name)
-            result = @children.select { |child| child.name == name }.first if @children
+            result = @children.find { |child| child.name == name } if @children
             result || CookbookArtifactDir.new(name, self)
           end
 
diff --git a/lib/chef/chef_fs/file_system/chef_server/cookbook_dir.rb b/lib/chef/chef_fs/file_system/chef_server/cookbook_dir.rb
index 3a08768baf..d69126ce6e 100644
--- a/lib/chef/chef_fs/file_system/chef_server/cookbook_dir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/cookbook_dir.rb
@@ -74,7 +74,7 @@ class Chef
             # we need to make sure we don't rethrow the exception.  (child(name)
             # is not supposed to fail.)
             begin
-              children.select { |child| child.name == name }.first
+              children.find { |child| child.name == name }
             rescue Chef::ChefFS::FileSystem::NotFoundError
               nil
             end
@@ -101,7 +101,7 @@ class Chef
                   container = self
                   parts[0, parts.length - 1].each do |part|
                     old_container = container
-                    container = old_container.children.select { |child| part == child.name }.first
+                    container = old_container.children.find { |child| part == child.name }
                     if !container
                       container = CookbookSubdir.new(part, old_container, segment_info[:ruby_only], segment_info[:recursive])
                       old_container.add_child(container)
diff --git a/lib/chef/chef_fs/file_system/chef_server/cookbook_subdir.rb b/lib/chef/chef_fs/file_system/chef_server/cookbook_subdir.rb
index 913cf1a5e2..01297a39ba 100644
--- a/lib/chef/chef_fs/file_system/chef_server/cookbook_subdir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/cookbook_subdir.rb
@@ -47,7 +47,7 @@ class Chef
           end
 
           def make_child_entry(name)
-            result = @children.select { |child| child.name == name }.first if @children
+            result = @children.find { |child| child.name == name } if @children
             result || NonexistentFSObject.new(name, self)
           end
 
diff --git a/lib/chef/chef_fs/file_system/chef_server/cookbooks_dir.rb b/lib/chef/chef_fs/file_system/chef_server/cookbooks_dir.rb
index 75d7150f8e..72cefe44eb 100644
--- a/lib/chef/chef_fs/file_system/chef_server/cookbooks_dir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/cookbooks_dir.rb
@@ -41,7 +41,7 @@ class Chef
           include Chef::Mixin::FileClass
 
           def make_child_entry(name)
-            result = @children.select { |child| child.name == name }.first if @children
+            result = @children.find { |child| child.name == name } if @children
             result || CookbookDir.new(name, self)
           end
 
diff --git a/lib/chef/chef_fs/file_system/chef_server/data_bags_dir.rb b/lib/chef/chef_fs/file_system/chef_server/data_bags_dir.rb
index 9246d8e2b7..ec382e60ef 100644
--- a/lib/chef/chef_fs/file_system/chef_server/data_bags_dir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/data_bags_dir.rb
@@ -25,7 +25,7 @@ class Chef
       module ChefServer
         class DataBagsDir < RestListDir
           def make_child_entry(name, exists = false)
-            result = @children.select { |child| child.name == name }.first if @children
+            result = @children.find { |child| child.name == name } if @children
             result || DataBagDir.new(name, self, exists)
           end
 
diff --git a/lib/chef/chef_fs/file_system/chef_server/policies_dir.rb b/lib/chef/chef_fs/file_system/chef_server/policies_dir.rb
index ebb274a9eb..4a4be19fe4 100644
--- a/lib/chef/chef_fs/file_system/chef_server/policies_dir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/policies_dir.rb
@@ -47,7 +47,7 @@ class Chef
           # }
 
           def make_child_entry(name, exists = nil)
-            @children.select { |child| child.name == name }.first if @children
+            @children.find { |child| child.name == name } if @children
             PolicyRevisionEntry.new(name, self, exists)
           end
 
diff --git a/lib/chef/chef_fs/file_system/chef_server/rest_list_dir.rb b/lib/chef/chef_fs/file_system/chef_server/rest_list_dir.rb
index 488e9c0ed0..b5b602a208 100644
--- a/lib/chef/chef_fs/file_system/chef_server/rest_list_dir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/rest_list_dir.rb
@@ -168,7 +168,7 @@ class Chef
           end
 
           def make_child_entry(name, exists = nil)
-            @children.select { |child| child.name == name }.first if @children
+            @children.find { |child| child.name == name } if @children
             RestListEntry.new(name, self, exists)
           end
         end
diff --git a/lib/chef/chef_fs/file_system/chef_server/versioned_cookbooks_dir.rb b/lib/chef/chef_fs/file_system/chef_server/versioned_cookbooks_dir.rb
index 9abafed5e7..172405763a 100644
--- a/lib/chef/chef_fs/file_system/chef_server/versioned_cookbooks_dir.rb
+++ b/lib/chef/chef_fs/file_system/chef_server/versioned_cookbooks_dir.rb
@@ -41,7 +41,7 @@ class Chef
         class VersionedCookbooksDir < CookbooksDir
 
           def make_child_entry(name)
-            result = @children.select { |child| child.name == name }.first if @children
+            result = @children.find { |child| child.name == name } if @children
             result || VersionedCookbookDir.new(name, self)
           end
 
diff --git a/lib/chef/chef_fs/file_system/memory/memory_dir.rb b/lib/chef/chef_fs/file_system/memory/memory_dir.rb
index beb661448d..6049f404b1 100644
--- a/lib/chef/chef_fs/file_system/memory/memory_dir.rb
+++ b/lib/chef/chef_fs/file_system/memory/memory_dir.rb
@@ -14,7 +14,7 @@ class Chef
           attr_reader :children
 
           def make_child_entry(name)
-            @children.select { |child| child.name == name }.first
+            @children.find { |child| child.name == name }
           end
 
           def add_child(child)
diff --git a/lib/chef/chef_fs/parallelizer/flatten_enumerable.rb b/lib/chef/chef_fs/parallelizer/flatten_enumerable.rb
index 6094fab493..84db2c2053 100644
--- a/lib/chef/chef_fs/parallelizer/flatten_enumerable.rb
+++ b/lib/chef/chef_fs/parallelizer/flatten_enumerable.rb
@@ -26,7 +26,7 @@ class Chef
               flatten(child, levels.nil? ? levels : levels - 1, &block)
             end
           else
-            block.call(value)
+            yield(value)
           end
         end
       end
diff --git a/lib/chef/cookbook_version.rb b/lib/chef/cookbook_version.rb
index 9ebf705d79..d9078ac48c 100644
--- a/lib/chef/cookbook_version.rb
+++ b/lib/chef/cookbook_version.rb
@@ -493,7 +493,7 @@ class Chef
         if rendered_manifest.has_key?(segment)
           rendered_manifest[segment].each do |manifest_record|
             url_options = { :cookbook_name => name.to_s, :cookbook_version => version, :checksum => manifest_record["checksum"] }
-            manifest_record["url"] = url_generator.call(url_options)
+            manifest_record["url"] = yield(url_options)
           end
         end
       end
diff --git a/lib/chef/http/authenticator.rb b/lib/chef/http/authenticator.rb
index b5e28cf54d..84065bf816 100644
--- a/lib/chef/http/authenticator.rb
+++ b/lib/chef/http/authenticator.rb
@@ -47,7 +47,7 @@ class Chef
       end
 
       def handle_request(method, url, headers = {}, data = false)
-        headers.merge!({ "X-Ops-Server-API-Version" => @api_version })
+        headers["X-Ops-Server-API-Version"] = @api_version
         headers.merge!(authentication_headers(method, url, data, headers)) if sign_requests?
         [method, url, headers, data]
       end
diff --git a/lib/chef/http/basic_client.rb b/lib/chef/http/basic_client.rb
index e0a02a05cf..58ae496418 100644
--- a/lib/chef/http/basic_client.rb
+++ b/lib/chef/http/basic_client.rb
@@ -104,7 +104,7 @@ class Chef
         # proxy before parsing. The regex /^.*:\/\// matches, for example, http://. Reusing proxy
         # here since we are really just trying to get the string built correctly.
         if String === proxy && !proxy.strip.empty?
-          if proxy.match(/^.*:\/\//)
+          if proxy =~ /^.*:\/\//
             proxy = URI.parse(proxy.strip)
           else
             proxy = URI.parse("#{url.scheme}://#{proxy.strip}")
diff --git a/lib/chef/http/remote_request_id.rb b/lib/chef/http/remote_request_id.rb
index ef8a18a1e3..a779df805e 100644
--- a/lib/chef/http/remote_request_id.rb
+++ b/lib/chef/http/remote_request_id.rb
@@ -25,7 +25,7 @@ class Chef
       end
 
       def handle_request(method, url, headers = {}, data = false)
-        headers.merge!({ "X-REMOTE-REQUEST-ID" => Chef::RequestID.instance.request_id })
+        headers["X-REMOTE-REQUEST-ID"] = Chef::RequestID.instance.request_id
         [method, url, headers, data]
       end
 
diff --git a/lib/chef/http/socketless_chef_zero_client.rb b/lib/chef/http/socketless_chef_zero_client.rb
index c8590903f6..e25242c033 100644
--- a/lib/chef/http/socketless_chef_zero_client.rb
+++ b/lib/chef/http/socketless_chef_zero_client.rb
@@ -67,7 +67,7 @@ class Chef
           end
 
           if block_given?
-            block.call(@body)
+            yield(@body)
           else
             super
           end
diff --git a/lib/chef/knife.rb b/lib/chef/knife.rb
index 657216bcf0..71127b5b57 100644
--- a/lib/chef/knife.rb
+++ b/lib/chef/knife.rb
@@ -514,7 +514,7 @@ class Chef
       output = edit_data(object, object_class: object_class)
 
       if Kernel.block_given?
-        output = block.call(output)
+        output = yield(output)
       else
         output.save
       end
@@ -530,7 +530,7 @@ class Chef
       confirm("Do you really want to delete #{name}")
 
       if Kernel.block_given?
-        object = block.call
+        object = yield
       else
         object = klass.load(name)
         object.destroy
diff --git a/lib/chef/knife/cookbook_site_download.rb b/lib/chef/knife/cookbook_site_download.rb
index 2bdeea9781..21a251a011 100644
--- a/lib/chef/knife/cookbook_site_download.rb
+++ b/lib/chef/knife/cookbook_site_download.rb
@@ -102,7 +102,7 @@ class Chef
       end
 
       def specific_cookbook_version_url
-        "#{cookbooks_api_url}/#{@name_args[0]}/versions/#{@name_args[1].gsub('.', '_')}"
+        "#{cookbooks_api_url}/#{@name_args[0]}/versions/#{@name_args[1].tr('.', '_')}"
       end
     end
   end
diff --git a/lib/chef/knife/cookbook_site_show.rb b/lib/chef/knife/cookbook_site_show.rb
index a6a4c82c85..c0280cb318 100644
--- a/lib/chef/knife/cookbook_site_show.rb
+++ b/lib/chef/knife/cookbook_site_show.rb
@@ -33,7 +33,7 @@ class Chef
         when 1
           noauth_rest.get("https://supermarket.chef.io/api/v1/cookbooks/#{@name_args[0]}")
         when 2
-          noauth_rest.get("https://supermarket.chef.io/api/v1/cookbooks/#{@name_args[0]}/versions/#{name_args[1].gsub('.', '_')}")
+          noauth_rest.get("https://supermarket.chef.io/api/v1/cookbooks/#{@name_args[0]}/versions/#{name_args[1].tr('.', '_')}")
         end
       end
 
diff --git a/lib/chef/knife/core/bootstrap_context.rb b/lib/chef/knife/core/bootstrap_context.rb
index b05cae688c..5379b6504c 100644
--- a/lib/chef/knife/core/bootstrap_context.rb
+++ b/lib/chef/knife/core/bootstrap_context.rb
@@ -171,9 +171,10 @@ validation_client_name "#{@chef_config[:validation_client_name]}"
         def first_boot
           (@config[:first_boot_attributes] || {}).tap do |attributes|
             if @config[:policy_name] && @config[:policy_group]
-              attributes.merge!(:policy_name => @config[:policy_name], :policy_group => @config[:policy_group])
+              attributes[:policy_name] = @config[:policy_name]
+              attributes[:policy_group] = @config[:policy_group]
             else
-              attributes.merge!(:run_list => @run_list)
+              attributes[:run_list] = @run_list
             end
 
             attributes.merge!(:tags => @config[:tags]) if @config[:tags] && !@config[:tags].empty?
diff --git a/lib/chef/knife/core/subcommand_loader.rb b/lib/chef/knife/core/subcommand_loader.rb
index 95ab219c80..e636013c70 100644
--- a/lib/chef/knife/core/subcommand_loader.rb
+++ b/lib/chef/knife/core/subcommand_loader.rb
@@ -118,7 +118,7 @@ class Chef
         load_command(cmd_words)
         result = Chef::Knife.subcommands[find_longest_key(Chef::Knife.subcommands,
                                                           cmd_words, "_")]
-        result || Chef::Knife.subcommands[args.first.gsub("-", "_")]
+        result || Chef::Knife.subcommands[args.first.tr("-", "_")]
       end
 
       def guess_category(args)
diff --git a/lib/chef/knife/search.rb b/lib/chef/knife/search.rb
index 30a3db3cf2..520c9273af 100644
--- a/lib/chef/knife/search.rb
+++ b/lib/chef/knife/search.rb
@@ -177,7 +177,7 @@ class Chef
       # See lib/chef/search/query.rb for more examples of this.
       def create_result_filter(filter_string)
         final_filter = Hash.new
-        filter_string.gsub!(" ", "")
+        filter_string.delete!(" ")
         filters = filter_string.split(",")
         filters.each do |f|
           return_id, attr_path = f.split("=")
diff --git a/lib/chef/knife/ssh.rb b/lib/chef/knife/ssh.rb
index 4184171a4e..9c0f8936f0 100644
--- a/lib/chef/knife/ssh.rb
+++ b/lib/chef/knife/ssh.rb
@@ -424,7 +424,7 @@ class Chef
           end.join(" \\; ")
         end
 
-        tmux_name = "'knife ssh #{@name_args[0].gsub(/:/, '=')}'"
+        tmux_name = "'knife ssh #{@name_args[0].tr(':', '=')}'"
         begin
           server = session.servers_for.first
           cmd = ["tmux new-session -d -s #{tmux_name}",
diff --git a/lib/chef/log.rb b/lib/chef/log.rb
index bfb5829be6..ac2baeb9d1 100644
--- a/lib/chef/log.rb
+++ b/lib/chef/log.rb
@@ -48,7 +48,7 @@ class Chef
       # Pick the first caller that is *not* part of the Chef gem, that's the
       # thing the user wrote.
       chef_gem_path = File.expand_path("../..", __FILE__)
-      caller(0..20).select { |c| !c.start_with?(chef_gem_path) }.first
+      caller(0..20).find { |c| !c.start_with?(chef_gem_path) }
     end
 
     def self.deprecation(msg = nil, location = caller(2..2)[0], &block)
diff --git a/lib/chef/mixin/command.rb b/lib/chef/mixin/command.rb
index 257ed11221..435daeda77 100644
--- a/lib/chef/mixin/command.rb
+++ b/lib/chef/mixin/command.rb
@@ -183,7 +183,7 @@ class Chef
           raise Chef::Exceptions::Exec, "#{dir} does not exist or is not a directory"
         end
         Dir.chdir(dir) do
-          block.call
+          yield
         end
       end
 
diff --git a/lib/chef/mixin/properties.rb b/lib/chef/mixin/properties.rb
index 2e33d2d0e7..1ee16b8b4a 100644
--- a/lib/chef/mixin/properties.rb
+++ b/lib/chef/mixin/properties.rb
@@ -98,7 +98,8 @@ class Chef
           options.each { |k, v| options[k.to_sym] = v if k.is_a?(String) }
 
           options[:instance_variable_name] = :"@#{name}" if !options.has_key?(:instance_variable_name)
-          options.merge!(name: name, declared_in: self)
+          options[:name] = name
+          options[:declared_in] = self
 
           if type == NOT_PASSED
             # If a type is not passed, the property derives from the
diff --git a/lib/chef/mixin/why_run.rb b/lib/chef/mixin/why_run.rb
index b2aa5949c0..69fee58e31 100644
--- a/lib/chef/mixin/why_run.rb
+++ b/lib/chef/mixin/why_run.rb
@@ -49,7 +49,7 @@ class Chef
         def add_action(descriptions, &block)
           @actions << [descriptions, block]
           if (@resource.respond_to?(:is_guard_interpreter) && @resource.is_guard_interpreter) || !Chef::Config[:why_run]
-            block.call
+            yield
           end
           events.resource_update_applied(@resource, @action, descriptions)
         end
diff --git a/lib/chef/provider/link.rb b/lib/chef/provider/link.rb
index d184094bbb..83b5dd8c00 100644
--- a/lib/chef/provider/link.rb
+++ b/lib/chef/provider/link.rb
@@ -86,7 +86,7 @@ class Chef
       end
 
       def canonicalize(path)
-        Chef::Platform.windows? ? path.gsub("/", '\\') : path
+        Chef::Platform.windows? ? path.tr("/", '\\') : path
       end
 
       def action_create
diff --git a/lib/chef/provider/package/portage.rb b/lib/chef/provider/package/portage.rb
index a514dcc66c..7127fa723f 100644
--- a/lib/chef/provider/package/portage.rb
+++ b/lib/chef/provider/package/portage.rb
@@ -66,7 +66,7 @@ class Chef
 
           txt.each_line do |line|
             if line =~ /\*\s+#{PACKAGE_NAME_PATTERN}/
-              found_package_name = $&.gsub(/\*/, "").strip
+              found_package_name = $&.delete("*").strip
               if package =~ /\// #the category is specified
                 if found_package_name == package
                   availables[found_package_name] = nil
diff --git a/lib/chef/provider/package/rubygems.rb b/lib/chef/provider/package/rubygems.rb
index 7a2db6b32b..6afe908180 100644
--- a/lib/chef/provider/package/rubygems.rb
+++ b/lib/chef/provider/package/rubygems.rb
@@ -410,7 +410,7 @@ class Chef
         def find_gem_by_path
           Chef::Log.debug("#{@new_resource} searching for 'gem' binary in path: #{ENV['PATH']}")
           separator = ::File::ALT_SEPARATOR ? ::File::ALT_SEPARATOR : ::File::SEPARATOR
-          path_to_first_gem = ENV["PATH"].split(::File::PATH_SEPARATOR).select { |path| ::File.exists?(path + separator + "gem") }.first
+          path_to_first_gem = ENV["PATH"].split(::File::PATH_SEPARATOR).find { |path| ::File.exists?(path + separator + "gem") }
           raise Chef::Exceptions::FileNotFound, "Unable to find 'gem' binary in path: #{ENV['PATH']}" if path_to_first_gem.nil?
           path_to_first_gem + separator + "gem"
         end
diff --git a/lib/chef/provider/service/arch.rb b/lib/chef/provider/service/arch.rb
index 9c66fb4098..c0545e9fb3 100644
--- a/lib/chef/provider/service/arch.rb
+++ b/lib/chef/provider/service/arch.rb
@@ -33,7 +33,7 @@ class Chef::Provider::Service::Arch < Chef::Provider::Service::Init
 
   def load_current_resource
     raise Chef::Exceptions::Service, "Could not find /etc/rc.conf" unless ::File.exists?("/etc/rc.conf")
-    raise Chef::Exceptions::Service, "No DAEMONS found in /etc/rc.conf" unless ::File.read("/etc/rc.conf").match(/DAEMONS=\((.*)\)/m)
+    raise Chef::Exceptions::Service, "No DAEMONS found in /etc/rc.conf" unless ::File.read("/etc/rc.conf") =~ /DAEMONS=\((.*)\)/m
     super
 
     @current_resource.enabled(daemons.include?(@current_resource.service_name))
@@ -49,7 +49,7 @@ class Chef::Provider::Service::Arch < Chef::Provider::Service::Init
   #   )
   def daemons
     entries = []
-    if ::File.read("/etc/rc.conf").match(/DAEMONS=\((.*)\)/m)
+    if ::File.read("/etc/rc.conf") =~ /DAEMONS=\((.*)\)/m
       entries += $1.gsub(/\\?[\r\n]/, " ").gsub(/# *[^ ]+/, " ").split(" ") if $1.length > 0
     end
 
diff --git a/lib/chef/provider/service/openbsd.rb b/lib/chef/provider/service/openbsd.rb
index c31df25e68..c60bbf170c 100644
--- a/lib/chef/provider/service/openbsd.rb
+++ b/lib/chef/provider/service/openbsd.rb
@@ -92,7 +92,7 @@ class Chef
               old_services_list = rc_conf_local.match(/^pkg_scripts="(.*)"/)
               old_services_list = old_services_list ? old_services_list[1].split(" ") : []
               new_services_list = old_services_list + [new_resource.service_name]
-              if rc_conf_local.match(/^pkg_scripts="(.*)"/)
+              if rc_conf_local =~ /^pkg_scripts="(.*)"/
                 new_rcl = rc_conf_local.sub(/^pkg_scripts="(.*)"/, "pkg_scripts=\"#{new_services_list.join(' ')}\"")
               else
                 new_rcl = rc_conf_local + "\n" + "pkg_scripts=\"#{new_services_list.join(' ')}\"\n"
@@ -159,7 +159,7 @@ class Chef
           result = false
           var_name = builtin_service_enable_variable_name
           if var_name
-            if rc_conf.match(/^#{Regexp.escape(var_name)}=(.*)/)
+            if rc_conf =~ /^#{Regexp.escape(var_name)}=(.*)/
               result = true
             end
           end
diff --git a/lib/chef/provider/service/upstart.rb b/lib/chef/provider/service/upstart.rb
index edd41dba7e..3ac5ff51da 100644
--- a/lib/chef/provider/service/upstart.rb
+++ b/lib/chef/provider/service/upstart.rb
@@ -62,7 +62,7 @@ class Chef
           end
 
           platform, version = Chef::Platform.find_platform_and_version(run_context.node)
-          if platform == "ubuntu" && (8.04..9.04).include?(version.to_f)
+          if platform == "ubuntu" && (8.04..9.04).cover?(version.to_f)
             @upstart_job_dir = "/etc/event.d"
             @upstart_conf_suffix = ""
           else
diff --git a/lib/chef/resource/mount.rb b/lib/chef/resource/mount.rb
index 44143d583c..2d85b3897c 100644
--- a/lib/chef/resource/mount.rb
+++ b/lib/chef/resource/mount.rb
@@ -102,7 +102,7 @@ class Chef
                             )
 
         if ret.is_a? String
-          ret.gsub(/,/, " ").split(/ /)
+          ret.tr(",", " ").split(/ /)
         else
           ret
         end
diff --git a/lib/chef/run_list.rb b/lib/chef/run_list.rb
index b9ec9259ca..9647ef16e6 100644
--- a/lib/chef/run_list.rb
+++ b/lib/chef/run_list.rb
@@ -106,11 +106,11 @@ class Chef
     end
 
     def each(&block)
-      @run_list_items.each { |i| block.call(i) }
+      @run_list_items.each { |i| yield(i) }
     end
 
     def each_index(&block)
-      @run_list_items.each_index { |i| block.call(i) }
+      @run_list_items.each_index { |i| yield(i) }
     end
 
     def include?(item)
diff --git a/lib/chef/search/query.rb b/lib/chef/search/query.rb
index 487a54f0df..ebf13bec36 100644
--- a/lib/chef/search/query.rb
+++ b/lib/chef/search/query.rb
@@ -87,7 +87,7 @@ WARNDEP
         response = call_rest_service(type, query: query, **args_h)
 
         if block
-          response["rows"].each { |row| block.call(row) if row }
+          response["rows"].each { |row| yield(row) if row }
           #
           # args_h[:rows] and args_h[:start] are the page size and
           # start position requested of the search index backing the
diff --git a/lib/chef/util/windows/net_user.rb b/lib/chef/util/windows/net_user.rb
index b0a779e44a..9bb615aee7 100644
--- a/lib/chef/util/windows/net_user.rb
+++ b/lib/chef/util/windows/net_user.rb
@@ -123,7 +123,7 @@ class Chef::Util::Windows::NetUser < Chef::Util::Windows
     user = get_info
     user[:last_logon] = user[:units_per_week] = 0 #ignored as per USER_INFO_3 doc
     user[:logon_hours] = nil #PBYTE field; \0 == no changes
-    proc.call(user)
+    yield(user)
     set_info(user)
   end
 
diff --git a/lib/chef/win32/api/file.rb b/lib/chef/win32/api/file.rb
index 52ac4868c7..09501e66ce 100644
--- a/lib/chef/win32/api/file.rb
+++ b/lib/chef/win32/api/file.rb
@@ -550,7 +550,7 @@ BOOL WINAPI VerQueryValue(
             if handle == INVALID_HANDLE_VALUE
               Chef::ReservedNames::Win32::Error.raise!
             end
-            block.call(handle, find_data)
+            yield(handle, find_data)
           ensure
             FindClose(handle) if handle && handle != INVALID_HANDLE_VALUE
           end
@@ -568,7 +568,7 @@ BOOL WINAPI VerQueryValue(
             if handle == INVALID_HANDLE_VALUE
               Chef::ReservedNames::Win32::Error.raise!
             end
-            block.call(handle)
+            yield(handle)
           ensure
             CloseHandle(handle) if handle && handle != INVALID_HANDLE_VALUE
           end
@@ -583,7 +583,7 @@ BOOL WINAPI VerQueryValue(
             if handle == INVALID_HANDLE_VALUE
               Chef::ReservedNames::Win32::Error.raise!
             end
-            block.call(handle)
+            yield(handle)
           ensure
             CloseHandle(handle) if handle && handle != INVALID_HANDLE_VALUE
           end
diff --git a/lib/chef/win32/version.rb b/lib/chef/win32/version.rb
index 85a2744645..303fe1531d 100644
--- a/lib/chef/win32/version.rb
+++ b/lib/chef/win32/version.rb
@@ -41,7 +41,7 @@ class Chef
       private_class_method :get_system_metrics
 
       def self.method_name_from_marketing_name(marketing_name)
-        "#{marketing_name.gsub(/\s/, '_').gsub(/\./, '_').downcase}?"
+        "#{marketing_name.gsub(/\s/, '_').tr('.', '_').downcase}?"
         # "#{marketing_name.gsub(/\s/, '_').gsub(//, '_').downcase}?"
       end
 
diff --git a/spec/functional/resource/link_spec.rb b/spec/functional/resource/link_spec.rb
index f55b9fca1e..7ea3b44a3d 100644
--- a/spec/functional/resource/link_spec.rb
+++ b/spec/functional/resource/link_spec.rb
@@ -73,7 +73,7 @@ describe Chef::Resource::Link do
   end
 
   def canonicalize(path)
-    windows? ? path.gsub("/", '\\') : path
+    windows? ? path.tr("/", '\\') : path
   end
 
   def symlink(a, b)
diff --git a/spec/functional/resource/user/useradd_spec.rb b/spec/functional/resource/user/useradd_spec.rb
index 6ac855fbfc..f5b228a4df 100644
--- a/spec/functional/resource/user/useradd_spec.rb
+++ b/spec/functional/resource/user/useradd_spec.rb
@@ -508,7 +508,7 @@ describe Chef::Provider::User::Useradd, metadata do
     let(:user_locked_context?) { false }
 
     def shadow_entry
-      etc_shadow.lines.select { |l| l.include?(username) }.first
+      etc_shadow.lines.find { |l| l.include?(username) }
     end
 
     def shadow_password
diff --git a/spec/functional/run_lock_spec.rb b/spec/functional/run_lock_spec.rb
index b0e52471db..f1e480c917 100644
--- a/spec/functional/run_lock_spec.rb
+++ b/spec/functional/run_lock_spec.rb
@@ -343,7 +343,7 @@ describe Chef::RunLock do
       write_to_process.print "#{to_event}\n"
 
       # Run the background block
-      background_block.call if background_block
+      yield if background_block
 
       # Wait until it gets there
       Timeout.timeout(CLIENT_PROCESS_TIMEOUT) do
diff --git a/spec/stress/win32/security_spec.rb b/spec/stress/win32/security_spec.rb
index 4fbd1dac9c..58cf7b3357 100644
--- a/spec/stress/win32/security_spec.rb
+++ b/spec/stress/win32/security_spec.rb
@@ -27,7 +27,7 @@ end
 describe "Chef::ReservedNames::Win32::Security", :windows_only do
 
   def monkeyfoo
-    File.join(CHEF_SPEC_DATA, "monkeyfoo").gsub("/", "\\")
+    File.join(CHEF_SPEC_DATA, "monkeyfoo").tr("/", "\\")
   end
 
   before :all do
diff --git a/spec/support/chef_helpers.rb b/spec/support/chef_helpers.rb
index aa60737c86..f64c14da4d 100644
--- a/spec/support/chef_helpers.rb
+++ b/spec/support/chef_helpers.rb
@@ -81,7 +81,7 @@ end
 # This is a helper to canonicalize paths that we're using in the file
 # tests.
 def canonicalize_path(path)
-  windows? ? path.gsub("/", '\\') : path
+  windows? ? path.tr("/", '\\') : path
 end
 
 # Check if a cmd exists on the PATH
diff --git a/spec/support/mock/constant.rb b/spec/support/mock/constant.rb
index a2abc1905e..942905144f 100644
--- a/spec/support/mock/constant.rb
+++ b/spec/support/mock/constant.rb
@@ -13,7 +13,7 @@ def mock_constants(constants, &block)
   end
 
   begin
-    block.call
+    yield
   ensure
     constants.each do |constant, val|
       source_object, const_name = parse_constant(constant)
diff --git a/spec/support/shared/unit/provider/file.rb b/spec/support/shared/unit/provider/file.rb
index 7ddd51db80..2b2c7255cc 100644
--- a/spec/support/shared/unit/provider/file.rb
+++ b/spec/support/shared/unit/provider/file.rb
@@ -37,7 +37,7 @@ end
 
 # forwards-vs-reverse slashes on windows sucks
 def windows_path
-  windows? ? normalized_path.gsub(/\\/, "/") : normalized_path
+  windows? ? normalized_path.tr('\\', "/") : normalized_path
 end
 
 # this is all getting a bit stupid, CHEF-4802 cut to remove all this
diff --git a/spec/unit/api_client/registration_spec.rb b/spec/unit/api_client/registration_spec.rb
index f086993860..0f036766da 100644
--- a/spec/unit/api_client/registration_spec.rb
+++ b/spec/unit/api_client/registration_spec.rb
@@ -98,7 +98,7 @@ describe Chef::ApiClient::Registration do
   it "has an HTTP client configured with validator credentials" do
     expect(registration.http_api).to be_a_kind_of(Chef::ServerAPI)
     expect(registration.http_api.options[:client_name]).to eq("test-validator")
-    auth = registration.http_api.middlewares.select { |klass| klass.kind_of? Chef::HTTP::Authenticator }.first
+    auth = registration.http_api.middlewares.find { |klass| klass.kind_of? Chef::HTTP::Authenticator }
     expect(auth.client_name).to eq("test-validator")
   end
 
diff --git a/spec/unit/chef_fs/parallelizer.rb b/spec/unit/chef_fs/parallelizer.rb
index 20edbcdcde..96b713b547 100644
--- a/spec/unit/chef_fs/parallelizer.rb
+++ b/spec/unit/chef_fs/parallelizer.rb
@@ -466,12 +466,12 @@ describe Chef::ChefFS::Parallelizer do
     def each(&each_block)
       @values.each do |value|
         @num_processed += 1
-        each_block.call(value)
+        yield(value)
       end
       if @block
         @block.call do |value|
           @num_processed += 1
-          each_block.call(value)
+          yield(value)
         end
       end
     end
diff --git a/spec/unit/knife/cookbook_site_download_spec.rb b/spec/unit/knife/cookbook_site_download_spec.rb
index d7f26f2f2e..d283bd417f 100644
--- a/spec/unit/knife/cookbook_site_download_spec.rb
+++ b/spec/unit/knife/cookbook_site_download_spec.rb
@@ -28,7 +28,7 @@ describe Chef::Knife::CookbookSiteDownload do
       @stderr           = StringIO.new
       @cookbook_api_url = "https://supermarket.chef.io/api/v1/cookbooks"
       @version          = "1.0.2"
-      @version_us       = @version.gsub ".", "_"
+      @version_us       = @version.tr ".", "_"
       @current_data     = { "deprecated"       => false,
                             "latest_version"   => "#{@cookbook_api_url}/apache2/versions/#{@version_us}",
                             "replacement" => "other_apache2" }
@@ -120,7 +120,7 @@ describe Chef::Knife::CookbookSiteDownload do
       context "downloading a cookbook of a specific version" do
         before do
           @version         = "1.0.1"
-          @version_us      = @version.gsub ".", "_"
+          @version_us      = @version.tr ".", "_"
           @cookbook_data   = { "version" => @version,
                                "file"    => "http://example.com/apache2_#{@version_us}.tgz" }
           @temp_file       = double(:path => "/tmp/apache2_#{@version_us}.tgz")
diff --git a/spec/unit/provider/link_spec.rb b/spec/unit/provider/link_spec.rb
index 31065d7bfd..6bb08551a2 100644
--- a/spec/unit/provider/link_spec.rb
+++ b/spec/unit/provider/link_spec.rb
@@ -39,7 +39,7 @@ describe Chef::Resource::Link, :not_supported_on_win2k3 do
   end
 
   def canonicalize(path)
-    Chef::Platform.windows? ? path.gsub("/", '\\') : path
+    Chef::Platform.windows? ? path.tr("/", '\\') : path
   end
 
   describe "when the target is a symlink" do
diff --git a/tasks/external_tests.rb b/tasks/external_tests.rb
index f6fd79c86b..a909ec2178 100644
--- a/tasks/external_tests.rb
+++ b/tasks/external_tests.rb
@@ -58,7 +58,7 @@ EXTERNAL_PROJECTS = {
 task :external_specs => EXTERNAL_PROJECTS.keys.map { |g| :"#{g.sub("-", "_")}_spec" }
 
 EXTERNAL_PROJECTS.each do |test_gem, commands|
-  task :"#{test_gem.gsub("-", "_")}_spec" do
+  task :"#{test_gem.tr("-", "_")}_spec" do
     bundle_exec_with_chef(test_gem, commands)
   end
 end