audit: Port rules from line_problems to rubocop part 3

Library/Homebrew/dev-cmd/audit.rb

@@ -866,10 +866,6 @@ class FormulaAuditor
 
     problem "Use spaces instead of tabs for indentation" if line =~ /^[ ]*\t/
 
-    if line.include?("ENV.x11")
-      problem "Use \"depends_on :x11\" instead of \"ENV.x11\""
-    end
-
     # Avoid hard-coding compilers
     if line =~ %r{(system|ENV\[.+\]\s?=)\s?['"](/usr/bin/)?(gcc|llvm-gcc|clang)['" ]}
       problem "Use \"\#{ENV.cc}\" instead of hard-coding \"#{Regexp.last_match(3)}\""
@@ -883,14 +879,6 @@ class FormulaAuditor
       problem "Use ENV instead of invoking '#{Regexp.last_match(1)}' to modify the environment"
     end
 
-    if formula.name != "wine" && line =~ /ENV\.universal_binary/
-      problem "macOS has been 64-bit only since 10.6 so ENV.universal_binary is deprecated."
-    end
-
-    if line =~ /build\.universal\?/
-      problem "macOS has been 64-bit only so build.universal? is deprecated."
-    end
-
     if line =~ /version == ['"]HEAD['"]/
       problem "Use 'build.head?' instead of inspecting 'version'"
     end
@@ -931,12 +919,6 @@ class FormulaAuditor
       problem "Use build instead of ARGV to check options"
     end
 
-    problem "Use new-style option definitions" if line.include?("def options")
-
-    if line.end_with?("def test")
-      problem "Use new-style test definitions (test do)"
-    end
-
     if line.include?("MACOS_VERSION")
       problem "Use MacOS.version instead of MACOS_VERSION"
     end
@@ -950,11 +932,6 @@ class FormulaAuditor
       problem "\"#{$&}\" is deprecated, use a comparison to MacOS.version instead"
     end
 
-    if line =~ /skip_clean\s+:all/
-      problem "`skip_clean :all` is deprecated; brew no longer strips symbols\n" \
-              "\tPass explicit paths to prevent Homebrew from removing empty folders."
-    end
-
     if line =~ /depends_on [A-Z][\w:]+\.new$/
       problem "`depends_on` can take requirement classes instead of instances"
     end
@@ -993,30 +970,6 @@ class FormulaAuditor
       problem "Use `assert_match` instead of `assert ...include?`"
     end
 
-    if line.include?('system "npm", "install"') && !line.include?("Language::Node") &&
-       formula.name !~ /^kibana(\@\d+(\.\d+)?)?$/
-      problem "Use Language::Node for npm install args"
-    end
-
-    if line.include?("fails_with :llvm")
-      problem "'fails_with :llvm' is now a no-op so should be removed"
-    end
-
-    if line =~ /system\s+['"](otool|install_name_tool|lipo)/ && formula.name != "cctools"
-      problem "Use ruby-macho instead of calling #{Regexp.last_match(1)}"
-    end
-
-    if formula.tap.to_s == "homebrew/core"
-      ["OS.mac?", "OS.linux?"].each do |check|
-        next unless line.include?(check)
-        problem "Don't use #{check}; Homebrew/core only supports macOS"
-      end
-    end
-
-    if line =~ /((revision|version_scheme)\s+0)/
-      problem "'#{Regexp.last_match(1)}' should be removed"
-    end
-
     return unless @strict
 
     problem "`#{Regexp.last_match(1)}` in formulae is deprecated" if line =~ /(env :(std|userpaths))/

Library/Homebrew/rubocops/extend/formula_cop.rb

@@ -3,12 +3,13 @@ require "parser/current"
 module RuboCop
   module Cop
     class FormulaCop < Cop
+      attr_accessor :file_path
       @registry = Cop.registry
 
       # This method is called by RuboCop and is the main entry point
       def on_class(node)
-        file_path = processed_source.buffer.name
+        @file_path = processed_source.buffer.name
-        return unless file_path_allowed?(file_path)
+        return unless file_path_allowed?
         return unless formula_class?(node)
         return unless respond_to?(:audit_formula)
         class_node, parent_class_node, @body = *node
@@ -99,8 +100,7 @@ module RuboCop
       def find_method_with_args(node, method_name, *args)
         methods = find_every_method_call_by_name(node, method_name)
         methods.each do |method|
-          next unless parameters_passed?(method, *args)
+          yield method if parameters_passed?(method, *args)
-          yield method
         end
       end
 
@@ -111,7 +111,7 @@ module RuboCop
       def find_instance_method_call(node, instance, method_name)
         methods = find_every_method_call_by_name(node, method_name)
         methods.each do |method|
-          next unless method.receiver && method.receiver.const_name == instance
+          next unless method.receiver && (method.receiver.const_name == instance || method.receiver.method_name == instance)
           @offense_source_range = method.source_range
           @offensive_node = method
           yield method
@@ -400,6 +400,12 @@ module RuboCop
         method_name(component_node) if component_node.def_type?
       end
 
+      # Returns the formula tap
+      def formula_tap
+        return unless match_obj = @file_path.match(%r{/(homebrew-\w+)/})
+        match_obj[1]
+      end
+
       def problem(msg)
         add_offense(@offensive_node, @offense_source_range, msg)
       end
@@ -411,11 +417,11 @@ module RuboCop
         class_node && string_content(class_node) == "Formula"
       end
 
-      def file_path_allowed?(file_path)
+      def file_path_allowed?
         paths_to_exclude = [%r{/Library/Homebrew/compat/},
                             %r{/Library/Homebrew/test/}]
-        return true if file_path.nil? # file_path is nil when source is directly passed to the cop eg., in specs
+        return true if @file_path.nil? # file_path is nil when source is directly passed to the cop eg., in specs
-        file_path !~ Regexp.union(paths_to_exclude)
+        @file_path !~ Regexp.union(paths_to_exclude)
       end
     end
   end

Library/Homebrew/rubocops/lines_cop.rb

@@ -73,7 +73,64 @@ module RuboCop
             next unless block_arg.source.size>1
             problem "\"inreplace <filenames> do |s|\" is preferred over \"|#{block_arg.source}|\"."
           end
+
+          [:rebuild, :version_scheme].each do |m|
+            find_method_with_args(body_node, m, 0) do
+              problem "'#{m} 0' should be removed"
+            end
+          end
+
+          [:mac?, :linux?].each do |m|
+            next unless formula_tap == "homebrew-core"
+            find_instance_method_call(body_node, "OS", m) do |check|
+              problem "Don't use #{check.source}; Homebrew/core only supports macOS"
+            end
+          end
+
+          find_method_with_args(body_node, :fails_with, :llvm) do
+            problem "'fails_with :llvm' is now a no-op so should be removed"
+          end
+
+          find_method_with_args(body_node, :system, /^(otool|install_name_tool|lipo)$/) do
+            problem "Use ruby-macho instead of calling #{@offensive_node.source}"
+          end
+          #
+          find_method_with_args(body_node, :system, /npm/, /install/) do |m|
+            next if @formula_name =~ /^kibana(\@\d+(\.\d+)?)?$/
+            problem "Use Language::Node for npm install args" unless languageNode?(m)
+          end
+          if find_method_def(body_node, :test)
+            problem "Use new-style test definitions (test do)"
+          end
+
+          if find_method_def(body_node, :options)
+            problem "Use new-style option definitions"
+          end
+
+          find_method_with_args(body_node, :skip_clean, :all) do
+            problem "`skip_clean :all` is deprecated; brew no longer strips symbols\n" \
+              "\tPass explicit paths to prevent Homebrew from removing empty folders."
+          end
+
+          find_instance_method_call(body_node, :build, :universal?) do
+            problem "macOS has been 64-bit only so build.universal? is deprecated."
+          end
+
+          find_instance_method_call(body_node, "ENV", :universal_binary) do
+            problem "macOS has been 64-bit only since 10.6 so ENV.universal_binary is deprecated."
+          end
+
+          find_instance_method_call(body_node, "ENV", :x11) do
+            problem 'Use "depends_on :x11" instead of "ENV.x11"'
+          end
         end
+
+        # This is Pattern Matching method for AST
+        # Takes the AST node as argument and yields matching node if block given
+        # Else returns boolean for the match
+        def_node_search :languageNode?, <<-PATTERN
+          (const (const nil :Language) :Node)
+        PATTERN
       end
     end
   end