Add file_identifier_hash to diff position

lib/gitlab/diff/formatters/base_formatter.rb

@@ -6,6 +6,7 @@ module Gitlab
       class BaseFormatter
         attr_reader :old_path
         attr_reader :new_path
+        attr_reader :file_identifier_hash
         attr_reader :base_sha
         attr_reader :start_sha
         attr_reader :head_sha
@@ -16,6 +17,7 @@ module Gitlab
             attrs[:diff_refs] = diff_file.diff_refs
             attrs[:old_path] = diff_file.old_path
             attrs[:new_path] = diff_file.new_path
+            attrs[:file_identifier_hash] = diff_file.file_identifier_hash
           end
 
           if diff_refs = attrs[:diff_refs]
@@ -26,6 +28,7 @@ module Gitlab
 
           @old_path = attrs[:old_path]
           @new_path = attrs[:new_path]
+          @file_identifier_hash = attrs[:file_identifier_hash]
           @base_sha = attrs[:base_sha]
           @start_sha = attrs[:start_sha]
           @head_sha  = attrs[:head_sha]
@@ -36,7 +39,7 @@ module Gitlab
         end
 
         def to_h
-          {
+          out = {
             base_sha: base_sha,
             start_sha: start_sha,
             head_sha: head_sha,
@@ -44,6 +47,12 @@ module Gitlab
             new_path: new_path,
             position_type: position_type
           }
+
+          if Feature.enabled?(:file_identifier_hash)
+            out[:file_identifier_hash] = file_identifier_hash
+          end
+
+          out
         end
 
         def position_type

lib/gitlab/diff/position.rb

@@ -9,6 +9,7 @@ module Gitlab
 
       delegate :old_path,
                :new_path,
+               :file_identifier_hash,
                :base_sha,
                :start_sha,
                :head_sha,

spec/lib/gitlab/diff/formatters/image_formatter_spec.rb

@@ -10,6 +10,7 @@ describe Gitlab::Diff::Formatters::ImageFormatter do
       head_sha: 789,
       old_path: 'old_image.png',
       new_path: 'new_image.png',
+      file_identifier_hash: '777',
       position_type: 'image'
     }
   end

spec/lib/gitlab/diff/formatters/text_formatter_spec.rb

@@ -10,6 +10,7 @@ describe Gitlab::Diff::Formatters::TextFormatter do
       head_sha: 789,
       old_path: 'old_path.txt',
       new_path: 'new_path.txt',
+      file_identifier_hash: '777',
       line_range: nil
     }
   end

spec/spec_helper.rb

@@ -195,6 +195,10 @@ RSpec.configure do |config|
         stub_feature_flags(flag => enable_rugged)
       end
 
+      # Disable the usage of file_identifier_hash by default until it is ready
+      # See https://gitlab.com/gitlab-org/gitlab/-/issues/33867
+      stub_feature_flags(file_identifier_hash: false)
+
       allow(Gitlab::GitalyClient).to receive(:can_use_disk?).and_return(enable_rugged)
     end
 

spec/support/shared_examples/lib/gitlab/position_formatters_shared_examples.rb

@@ -32,8 +32,22 @@ RSpec.shared_examples "position formatter" do
 
     subject { formatter.to_h }
 
+    context 'when file_identifier_hash is disabled' do
+      before do
+        stub_feature_flags(file_identifier_hash: false)
+      end
+
+      it { is_expected.to eq(formatter_hash.except(:file_identifier_hash)) }
+    end
+
+    context 'when file_identifier_hash is enabled' do
+      before do
+        stub_feature_flags(file_identifier_hash: true)
+      end
+
       it { is_expected.to eq(formatter_hash) }
     end
+  end
 
   describe '#==' do
     subject { formatter }