(MAINT) Drop Ruby 2.1.x and Puppet 4.x compatibility

.rubocop.yml

@@ -1,6 +1,8 @@
+require: rubocop-performance
 inherit_from: .rubocop_todo.yml
 
 AllCops:
+  TargetRubyVersion: 2.3
   Exclude:
     # Ignore HTML related things
     - '**/*.erb'
@@ -9,6 +11,7 @@ AllCops:
     - spec/fixtures/modules/**/*
     - spec/fixtures/ruby/**/*
 
+
 # DISABLED - not useful
 Bundler/OrderedGems:
   Enabled: false
@@ -34,7 +37,7 @@ Lint/EnsureReturn:
   Enabled: false
 
 # MAYBE useful - errors when rescue {} happens.
-Lint/HandleExceptions:
+Lint/SuppressedException:
   Enabled: false
 
 # MAYBE useful - but too many instances
@@ -119,7 +122,7 @@ Lint/ParenthesesAsGroupedExpression:
 Lint/RescueException:
   Enabled: false
 
-Lint/StringConversionInInterpolation:
+Lint/RedundantStringCoercion:
   Enabled: false
 
 Lint/UnusedBlockArgument:
@@ -143,13 +146,13 @@ Naming/AccessorMethodName:
 Style/Alias:
   Enabled: false
 
-Layout/AlignArray:
+Layout/ArrayAlignment:
   Enabled: false
 
-Layout/AlignHash:
+Layout/HashAlignment:
   Enabled: false
 
-Layout/AlignParameters:
+Layout/ParameterAlignment:
   Enabled: false
 
 Metrics/BlockNesting:
@@ -161,9 +164,6 @@ Style/AsciiComments:
 Style/Attr:
   Enabled: false
 
-Style/BracesAroundHashParameters:
-  Enabled: false
-
 Style/CaseEquality:
   Enabled: false
 
@@ -198,7 +198,7 @@ Style/WhenThen:
 Style/WordArray:
   Enabled: false
 
-Style/UnneededPercentQ:
+Style/RedundantPercentQ:
   Enabled: false
 
 Layout/Tab:
@@ -207,7 +207,7 @@ Layout/Tab:
 Layout/SpaceBeforeSemicolon:
   Enabled: false
 
-Layout/TrailingBlankLines:
+Layout/TrailingEmptyLines:
   Enabled: false
 
 Layout/SpaceInsideBlockBraces:
@@ -292,10 +292,10 @@ Style/EachWithObject:
 Layout/EmptyLineBetweenDefs:
   Enabled: false
 
-Layout/IndentArray:
+Layout/FirstArrayElementIndentation:
   Enabled: false
 
-Layout/IndentHash:
+Layout/FirstHashElementIndentation:
   Enabled: false
 
 Layout/IndentationConsistency:
@@ -313,7 +313,7 @@ Layout/EmptyLinesAroundAccessModifier:
 Style/EmptyLiteral:
   Enabled: false
 
-Metrics/LineLength:
+Layout/LineLength:
   Enabled: false
 
 Style/MethodCallWithoutArgsParentheses:
@@ -430,6 +430,9 @@ Style/Not:
 Style/NumericLiterals:
   Enabled: false
 
+Style/NumericPredicate:
+  Enabled: false
+
 Style/OneLineConditional:
   Enabled: false
 
@@ -526,7 +529,7 @@ Layout/EmptyLinesAroundBlockBody:
 Layout/EmptyLinesAroundClassBody:
   Enabled: false
 
-Style/UnneededInterpolation:
+Style/RedundantInterpolation:
   Enabled: false
 
 Style/SymbolProc:
@@ -575,5 +578,24 @@ Naming/VariableNumber:
 Layout/EndOfLine:
   EnforcedStyle: lf
 
-Layout/IndentHeredoc: # Not appicable on Ruby 2.1
+Layout/HeredocIndentation: # Not appicable on Ruby 2.1
   Enabled: false
+
+Lint/RaiseException:
+  Enabled: true
+
+Lint/StructNewOverride:
+  Enabled: true
+
+Style/HashEachMethods:
+  Enabled: true
+
+Style/HashTransformKeys:
+  Enabled: false # requires Ruby 2.5
+
+Style/HashTransformValues:
+  Enabled: false # requires Ruby 2.4
+
+Naming/MethodParameterName:
+  Enabled: true
+  AllowedNames: [ o ]

.travis.yml

@@ -16,18 +16,14 @@ script: 'SPEC_OPTS="--format documentation" COVERAGE="yes" bundle exec rake $CHE
 jobs:
   fast_finish: true
   include:
-    - rvm: 2.1.9
-      env: PUPPET_GEM_VERSION="~> 4" CHECK=spec
-    - rvm: 2.4.1
-      env: PUPPET_GEM_VERSION="~> 4" CHECK=spec
-    - rvm: 2.4.1
+    - rvm: 2.3
+      env: PUPPET_GEM_VERSION="~> 4" CHECK=rubocop
+    - rvm: 2.4
       env: PUPPET_GEM_VERSION="~> 5" CHECK=spec
     - rvm: 2.5
       env: PUPPET_GEM_VERSION="~> 6" CHECK=spec
     - rvm: 2.7
       env: PUPPET_GEM_VERSION="~> 6" CHECK=spec
-    - rvm: 2.1.9
-      env: PUPPET_GEM_VERSION="~> 4" CHECK=rubocop
     - bundler_args: ""
       rvm: 2.5
       before_script:

Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source ENV['GEM_SOURCE'] || "https://rubygems.org"
 
 gemspec
@@ -37,8 +39,9 @@ group :development do
   gem 'pry-byebug'
 end
 
+gem 'rubocop', '~> 0.81.0' # last release that supports Ruby 2.3.0
 gem 'rubocop-rspec'
-gem 'rubocop', '~> 0.57.2'
+gem 'rubocop-performance'
 
 # Evaluate Gemfile.local if it exists
 if File.exists? "#{__FILE__}.local"

Rakefile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 if Bundler.rubygems.find_name('puppet_litmus').any?
   require 'puppet_litmus/rake_tasks'
 
@@ -54,7 +56,7 @@ PuppetLint.configuration.ignore_paths = %w(acceptance/**/*.pp spec/**/*.pp pkg/*
 desc 'Validate Ruby source files and ERB templates.'
 task :validate do
   Dir['spec/**/*.rb','lib/**/*.rb'].each do |ruby_file|
-    sh "ruby -c #{ruby_file}" unless ruby_file =~ /spec\/fixtures/
+    sh "ruby -c #{ruby_file}" unless /spec\/fixtures/.match?(ruby_file)
   end
   Dir['lib/puppet-strings/yard/templates/**/*.erb'].each do |template|
     sh "erb -P -x -T '-' #{template} | ruby -c"
@@ -93,10 +95,12 @@ namespace :litmus do
     `gem build puppet-strings.gemspec --quiet`
     result = $CHILD_STATUS
     raise "Unable to build the puppet-strings gem. Returned exit code #{result.exitstatus}" unless result.exitstatus.zero?
+
     puts 'Built'
     # Find the gem build artifact
     gem_tar = Dir.glob('puppet-strings-*.gem').max_by { |f| File.mtime(f) }
     raise "Unable to find package in 'puppet-strings-*.gem'" if gem_tar.nil?
+
     gem_tar = File.expand_path(gem_tar)
 
     target_string = if args[:target_node_name].nil?

lib/puppet-strings.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # The root module for Puppet Strings.
 module PuppetStrings
   # The glob patterns used to search for files to document.

lib/puppet-strings/describe.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'json'
 require 'puppet-strings/json'
 

lib/puppet-strings/json.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'json'
 
 # The module for JSON related functionality.

lib/puppet-strings/markdown.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'puppet-strings/json'
 
 # module for parsing Yard Registries and generating markdown
@@ -15,15 +17,15 @@ module PuppetStrings::Markdown
   # @return [String] markdown doc
   def self.generate
     final = "# Reference\n\n"
-    final << "<!-- DO NOT EDIT: This document was generated by Puppet Strings -->\n\n"
-    final << PuppetStrings::Markdown::TableOfContents.render
-    final << PuppetStrings::Markdown::PuppetClasses.render
-    final << PuppetStrings::Markdown::DefinedTypes.render
-    final << PuppetStrings::Markdown::ResourceTypes.render
-    final << PuppetStrings::Markdown::Functions.render
-    final << PuppetStrings::Markdown::DataTypes.render
-    final << PuppetStrings::Markdown::PuppetTasks.render
-    final << PuppetStrings::Markdown::PuppetPlans.render
+    final += "<!-- DO NOT EDIT: This document was generated by Puppet Strings -->\n\n"
+    final += PuppetStrings::Markdown::TableOfContents.render
+    final += PuppetStrings::Markdown::PuppetClasses.render
+    final += PuppetStrings::Markdown::DefinedTypes.render
+    final += PuppetStrings::Markdown::ResourceTypes.render
+    final += PuppetStrings::Markdown::Functions.render
+    final += PuppetStrings::Markdown::DataTypes.render
+    final += PuppetStrings::Markdown::PuppetTasks.render
+    final += PuppetStrings::Markdown::PuppetPlans.render
 
     final
   end

lib/puppet-strings/markdown/base.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'puppet-strings'
 require 'puppet-strings/json'
 require 'puppet-strings/yard'
@@ -68,7 +70,7 @@ def initialize(registry, component_type)
 
     # @return [String] top-level name
     def name
-      @registry[:name].to_s unless @registry[:name].nil?
+      @registry[:name]&.to_s
     end
 
     # @return [String] 'Overview' text (untagged text)

lib/puppet-strings/markdown/data_type.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'puppet-strings/markdown/base'
 
 module PuppetStrings::Markdown

lib/puppet-strings/markdown/data_types.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'data_type'
 
 module PuppetStrings::Markdown
@@ -22,7 +24,7 @@ def self.contains_private?
     def self.render
       final = in_dtypes.length > 0 ? "## Data types\n\n" : ""
       in_dtypes.each do |type|
-        final << type.render unless type.private?
+        final += type.render unless type.private?
       end
       final
     end

lib/puppet-strings/markdown/defined_type.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'puppet-strings/markdown/base'
 
 module PuppetStrings::Markdown

lib/puppet-strings/markdown/defined_types.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'defined_type'
 
 module PuppetStrings::Markdown
@@ -19,7 +21,7 @@ def self.contains_private?
     def self.render
       final = in_dtypes.length > 0 ? "## Defined types\n\n" : ""
       in_dtypes.each do |type|
-        final << type.render unless type.private?
+        final += type.render unless type.private?
       end
       final
     end

lib/puppet-strings/markdown/function.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'puppet-strings/markdown/base'
 
 module PuppetStrings::Markdown
@@ -19,23 +21,23 @@ def render
 
     def type
       t = @registry[:type]
-      if t =~ /ruby4x/
+      if /ruby4x/.match?(t)
         "Ruby 4.x API"
-      elsif t =~ /ruby3/
+      elsif /ruby3/.match?(t)
         "Ruby 3.x API"
-      elsif t =~ /ruby/
+      elsif /ruby/.match?(t)
         "Ruby"
       else
         "Puppet Language"
       end
     end
 
-    def error_type(r) # rubocop:disable Naming/UncommunicativeMethodParamName
-      "`#{r.split(' ')[0]}`"
+    def error_type(type)
+      "`#{type.split(' ')[0]}`"
     end
 
-    def error_text(r) # rubocop:disable Naming/UncommunicativeMethodParamName
-      "#{r.split(' ').drop(1).join(' ')}"
+    def error_text(text)
+      "#{text.split(' ').drop(1).join(' ')}"
     end
   end
 

lib/puppet-strings/markdown/functions.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'function'
 
 module PuppetStrings::Markdown
@@ -19,7 +21,7 @@ def self.contains_private?
     def self.render
       final = in_functions.length > 0 ? "## Functions\n\n" : ""
       in_functions.each do |func|
-        final << func.render unless func.private?
+        final += func.render unless func.private?
       end
       final
     end

lib/puppet-strings/markdown/puppet_class.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'puppet-strings/markdown/base'
 
 module PuppetStrings::Markdown

lib/puppet-strings/markdown/puppet_classes.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'puppet_class'
 
 module PuppetStrings::Markdown
@@ -19,7 +21,7 @@ def self.contains_private?
     def self.render
       final = in_classes.length > 0 ? "## Classes\n\n" : ""
       in_classes.each do |klass|
-        final << klass.render unless klass.private?
+        final += klass.render unless klass.private?
       end
       final
     end

lib/puppet-strings/markdown/puppet_plan.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'puppet-strings/markdown/base'
 
 module PuppetStrings::Markdown