implement #filter_excluded_tags_regex with regex exclude_tags

lib/github_changelog_generator/generator/generator_tags.rb

@@ -131,9 +131,13 @@ module GitHubChangelogGenerator
     # @param [Array] all_tags all tags
     # @return [Array] filtered tags according :exclude_tags option
     def filter_excluded_tags(all_tags)
-      return all_tags unless @options[:exclude_tags]
-
-      apply_exclude_tags(all_tags)
+      if @options[:exclude_tags]
+        apply_exclude_tags(all_tags)
+      elsif @options[:exclude_tags_regex]
+        apply_exclude_tags_regex(all_tags)
+      else
+        all_tags
+      end
     end
 
     private
@@ -146,9 +150,20 @@ module GitHubChangelogGenerator
       end
     end
 
+    def apply_exclude_tags_regex(all_tags)
+      filter_tags_with_regex(all_tags)
+    end
+
     def filter_tags_with_regex(all_tags)
       warn_if_nonmatching_regex(all_tags)
-      all_tags.reject { |tag| @options[:exclude_tags] =~ tag.name }
+
+      if @options[:exclude_tags]
+        all_tags.reject { |tag| @options[:exclude_tags] =~ tag.name }
+      elsif @options[:exclude_tags_regex]
+        regex = Regexp.new(@options[:exclude_tags_regex])
+        all_tags.reject { |tag| regex =~ tag.name }
+      end
+
     end
 
     def filter_exact_tags(all_tags)

spec/unit/generator/generator_tags_spec.rb

@@ -73,6 +73,16 @@ describe GitHubChangelogGenerator::Generator do
     end
   end
 
+  describe "#filter_excluded_tags_regex" do
+    subject { generator.filter_excluded_tags(tags_mash_from_strings(%w(v1.2.3+12 v1.2.3))) }
+
+    context "with regex exclude_tags" do
+      let(:generator) { GitHubChangelogGenerator::Generator.new(exclude_tags_regex: '.*\+\d{1,}') }
+      it { is_expected.to be_a Array }
+      it { is_expected.to match_array(tags_mash_from_strings(%w(v1.2.3))) }
+    end
+  end
+
   describe "#filter_excluded_tags" do
     subject { generator.filter_excluded_tags(tags_mash_from_strings(%w(1 2 3))) }