audit: Port rules from line_problems to rubocop part 4(WIP)

Library/Homebrew/dev-cmd/audit.rb

@@ -927,15 +927,6 @@ class FormulaAuditor
       problem "Use MacOS.full_version instead of MACOS_FULL_VERSION"
     end
 
-    cats = %w[leopard snow_leopard lion mountain_lion].join("|")
-    if line =~ /MacOS\.(?:#{cats})\?/
-      problem "\"#{$&}\" is deprecated, use a comparison to MacOS.version instead"
-    end
-
-    if line =~ /depends_on [A-Z][\w:]+\.new$/
-      problem "`depends_on` can take requirement classes instead of instances"
-    end
-
     if line =~ /^def (\w+).*$/
       problem "Define method #{Regexp.last_match(1).inspect} in the class body, not at the top-level"
     end
@@ -956,20 +947,6 @@ class FormulaAuditor
       conditional_dep_problems(Regexp.last_match(1), Regexp.last_match(2), $&)
     end
 
-    if line =~ /(Dir\[("[^\*{},]+")\])/
-      problem "#{Regexp.last_match(1)} is unnecessary; just use #{Regexp.last_match(2)}"
-    end
-
-    if line =~ /system (["'](#{FILEUTILS_METHODS})["' ])/o
-      system = Regexp.last_match(1)
-      method = Regexp.last_match(2)
-      problem "Use the `#{method}` Ruby method instead of `system #{system}`"
-    end
-
-    if line =~ /assert [^!]+\.include?/
-      problem "Use `assert_match` instead of `assert ...include?`"
-    end
-
     return unless @strict
 
     problem "`#{Regexp.last_match(1)}` in formulae is deprecated" if line =~ /(env :(std|userpaths))/

Library/Homebrew/rubocops/lines_cop.rb

@@ -1,3 +1,4 @@
+require 'FileUtils'
 require_relative "./extend/formula_cop"
 
 module RuboCop
@@ -123,6 +124,37 @@ module RuboCop
           find_instance_method_call(body_node, "ENV", :x11) do
             problem 'Use "depends_on :x11" instead of "ENV.x11"'
           end
+
+          find_every_method_call_by_name(body_node, :assert).each do |m|
+            if method_called?(m, :include?) && !method_called?(m, :!)
+              problem "Use `assert_match` instead of `assert ...include?`"
+            end
+          end
+
+          find_every_method_call_by_name(body_node, :depends_on).each do |m|
+            next unless method_called?(m, :new)
+            problem "`depends_on` can take requirement classes instead of instances"
+          end
+
+          os = [:leopard?, :snow_leopard?, :lion?, :mountain_lion?]
+          os.each do |version|
+            find_instance_method_call(body_node, :MacOS, version) do |m|
+              problem "\"#{m.source}\" is deprecated, use a comparison to MacOS.version instead"
+            end
+          end
+
+          dirPattern(body_node) do |m|
+            next unless m =~ /\[("[^\*{},]+")\]/
+            problem "Dir(#{Regexp.last_match(1)}) is unnecessary; just use #{Regexp.last_match(1)}"
+          end
+
+          fileUtils_methods= FileUtils.singleton_methods(false).map { |m| Regexp.escape(m) }.join "|"
+          find_method_with_args(body_node, :system, /fileUtils_methods/) do |m|
+            method = string_content(@offensive_node)
+            problem "Use the `#{method}` Ruby method instead of `#{m.source}`"
+          end
+
+
         end
 
         # This is Pattern Matching method for AST
@@ -131,7 +163,16 @@ module RuboCop
         def_node_search :languageNode?, <<-PATTERN
           (const (const nil :Language) :Node)
         PATTERN
+
+        def_node_search :dirPattern, <<-PATTERN
+          (send (const nil :Dir) :[] (str $_))
+        PATTERN
       end
     end
   end
 end
+
+# Strict rules ported early
+# find_method_with_args(@processed_source.ast, :require, "formula") do |m|
+#   problem "#{m.source} is now unnecessary"
+# end