Merge branch 'extract-ee-specific-banzai-filters' into 'master'

Extract EE-specific lines from Banzai pipelines

Closes #6065

See merge request gitlab-org/gitlab-ee!6518

ee/lib/ee/banzai/pipeline/gfm_pipeline.rb

+module EE
+  module Banzai
+    module Pipeline
+      module GfmPipeline
+        extend ActiveSupport::Concern
+
+        class_methods do
+          def reference_filters
+            [
+              ::Banzai::Filter::EpicReferenceFilter,
+              *super
+            ]
+          end
+        end
+      end
+    end
+  end
+end

ee/lib/ee/banzai/pipeline/post_process_pipeline.rb

+module EE
+  module Banzai
+    module Pipeline
+      module PostProcessPipeline
+        extend ActiveSupport::Concern
+
+        class_methods do
+          def internal_link_filters
+            [
+              *super,
+              ::Banzai::Filter::CrossProjectIssuableInformationFilter
+            ]
+          end
+        end
+      end
+    end
+  end
+end

ee/lib/ee/banzai/pipeline/single_line_pipeline.rb

+module EE
+  module Banzai
+    module Pipeline
+      module SingleLinePipeline
+        extend ActiveSupport::Concern
+
+        class_methods do
+          def reference_filters
+            [
+              ::Banzai::Filter::EpicReferenceFilter,
+              *super
+            ]
+          end
+        end
+      end
+    end
+  end
+end

lib/banzai/pipeline/gfm_pipeline.rb

 module Banzai
   module Pipeline
     class GfmPipeline < BasePipeline
+      prepend EE::Banzai::Pipeline::GfmPipeline
+
       # These filters convert GitLab Flavored Markdown (GFM) to HTML.
       # The handlers defined in app/assets/javascripts/behaviors/markdown/copy_as_gfm.js
       # consequently convert that same HTML to GFM to be copied to the clipboard.
@@ -24,7 +26,17 @@ module Banzai
           Filter::AutolinkFilter,
           Filter::ExternalLinkFilter,
 
-          Filter::EpicReferenceFilter,
+          *reference_filters,
+
+          Filter::TaskListFilter,
+          Filter::InlineDiffFilter,
+
+          Filter::SetDirectionFilter
+        ]
+      end
+
+      def self.reference_filters
+        [
           Filter::UserReferenceFilter,
           Filter::IssueReferenceFilter,
           Filter::ExternalIssueReferenceFilter,
@@ -33,12 +45,7 @@ module Banzai
           Filter::CommitRangeReferenceFilter,
           Filter::CommitReferenceFilter,
           Filter::LabelReferenceFilter,
-          Filter::MilestoneReferenceFilter,
-
-          Filter::TaskListFilter,
-          Filter::InlineDiffFilter,
-
-          Filter::SetDirectionFilter
+          Filter::MilestoneReferenceFilter
         ]
       end
 

lib/banzai/pipeline/post_process_pipeline.rb

 module Banzai
   module Pipeline
     class PostProcessPipeline < BasePipeline
+      prepend EE::Banzai::Pipeline::PostProcessPipeline
+
       def self.filters
-        FilterArray[
+        @filters ||= FilterArray[
+          *internal_link_filters,
+          Filter::AbsoluteLinkFilter
+        ]
+      end
+
+      def self.internal_link_filters
+        [
           Filter::RedactorFilter,
           Filter::RelativeLinkFilter,
-          Filter::IssuableStateFilter,
-          Filter::CrossProjectIssuableInformationFilter,
-          Filter::AbsoluteLinkFilter
+          Filter::IssuableStateFilter
         ]
       end
 

lib/banzai/pipeline/single_line_pipeline.rb

 module Banzai
   module Pipeline
     class SingleLinePipeline < GfmPipeline
+      prepend EE::Banzai::Pipeline::SingleLinePipeline
+
       def self.filters
         @filters ||= FilterArray[
           Filter::HtmlEntityFilter,
@@ -10,7 +12,12 @@ module Banzai
           Filter::AutolinkFilter,
           Filter::ExternalLinkFilter,
 
-          Filter::EpicReferenceFilter,
+          *reference_filters
+        ]
+      end
+
+      def self.reference_filters
+        [
           Filter::UserReferenceFilter,
           Filter::IssueReferenceFilter,
           Filter::ExternalIssueReferenceFilter,