audit: Port dependency rules from line_problems to rubocop and add tests

Library/Homebrew/dev-cmd/audit.rb

@@ -909,16 +909,6 @@ class FormulaAuditor
       problem "\"#{Regexp.last_match(1)}\" should be \"\#{#{Regexp.last_match(2)}}\""
     end
 
-    if line =~ /depends_on :(automake|autoconf|libtool)/
-      problem ":#{Regexp.last_match(1)} is deprecated. Usage should be \"#{Regexp.last_match(1)}\""
-    end
-
-    if line =~ /depends_on :apr/
-      problem ":apr is deprecated. Usage should be \"apr-util\""
-    end
-
-    problem ":tex is deprecated" if line =~ /depends_on :tex/
-
     if line =~ /depends_on\s+['"](.+)['"]\s+=>\s+:(lua|perl|python|ruby)(\d*)/
       problem "#{Regexp.last_match(2)} modules should be vendored rather than use deprecated `depends_on \"#{Regexp.last_match(1)}\" => :#{Regexp.last_match(2)}#{Regexp.last_match(3)}`"
     end

Library/Homebrew/rubocops.rb

@@ -10,3 +10,4 @@ require_relative "./rubocops/legacy_patches_cop"
 require_relative "./rubocops/conflicts_cop"
 require_relative "./rubocops/options_cop"
 require_relative "./rubocops/urls_cop"
+require_relative "./rubocops/lines_cop"

Library/Homebrew/rubocops/extend/formula_cop.rb

@@ -124,7 +124,8 @@ module RuboCop
 
         case type
         when :required
-          type_match = !node.method_args.nil? && node.method_args.first.str_type?
+          type_match = !node.method_args.nil? &&
+                       (node.method_args.first.str_type? || node.method_args.first.sym_type?)
           if type_match && !name_match
             name_match = node_equals?(node.method_args.first, name)
           end

Library/Homebrew/rubocops/lines_cop.rb

@@ -0,0 +1,20 @@
+require_relative "./extend/formula_cop"
+
+module RuboCop
+  module Cop
+    module FormulaAudit
+      # This cop checks for various miscellaneous Homebrew coding styles
+      class Lines < FormulaCop
+        def audit_formula(_node, _class_node, _parent_class_node, _body_node)
+          [:automake, :autoconf, :libtool].each do |dependency|
+            next unless depends_on?(dependency)
+            problem ":#{dependency} is deprecated. Usage should be \"#{dependency}\""
+          end
+
+          problem ':apr is deprecated. Usage should be "apr-util"' if depends_on?(:apr)
+          problem ":tex is deprecated" if depends_on?(:tex)
+        end
+      end
+    end
+  end
+end

Library/Homebrew/test/rubocops/lines_cop_spec.rb

@@ -0,0 +1,53 @@
+require "rubocop"
+require "rubocop/rspec/support"
+require_relative "../../extend/string"
+require_relative "../../rubocops/lines_cop"
+
+describe RuboCop::Cop::FormulaAudit::Lines do
+  subject(:cop) { described_class.new }
+
+  context "When auditing lines" do
+    it "with correctable deprecated dependencies" do
+      formulae = [{
+        "dependency" => :automake,
+        "correct"    => "automake",
+      }, {
+        "dependency" => :autoconf,
+        "correct"    => "autoconf",
+      }, {
+        "dependency" => :libtool,
+        "correct"    => "libtool",
+      }, {
+        "dependency" => :apr,
+        "correct"    => "apr-util",
+      }, {
+        "dependency" => :tex,
+      }]
+
+      formulae.each do |formula|
+        source = <<-EOS.undent
+        class Foo < Formula
+          url 'http://example.com/foo-1.0.tgz'
+          depends_on :#{formula["dependency"]}
+        end
+        EOS
+        if formula.key?("correct")
+          offense = ":#{formula["dependency"]} is deprecated. Usage should be \"#{formula["correct"]}\""
+        else
+          offense = ":#{formula["dependency"]} is deprecated"
+        end
+        expected_offenses = [{  message: offense,
+                                severity: :convention,
+                                line: 3,
+                                column: 2,
+                                source: source }]
+
+        inspect_source(cop, source)
+
+        expected_offenses.zip(cop.offenses.reverse).each do |expected, actual|
+          expect_offense(expected, actual)
+        end
+      end
+    end
+  end
+end