Change GetRawChanges RPC to use bytes

changelogs/unreleased/po-raw-changes-encoding.yml

+---
+title: Expect bytes from Gitaly RPC GetRawChanges
+merge_request: 28164
+author:
+type: fixed

lib/gitlab/git/raw_diff_change.rb

@@ -11,8 +11,8 @@ module Gitlab
         if raw_change.is_a?(Gitaly::GetRawChangesResponse::RawChange)
           @blob_id = raw_change.blob_id
           @blob_size = raw_change.size
-          @old_path = raw_change.old_path.presence
-          @new_path = raw_change.new_path.presence
+          @old_path = raw_change.old_path_bytes.presence
+          @new_path = raw_change.new_path_bytes.presence
           @operation = raw_change.operation&.downcase || :unknown
         else
           parse(raw_change)

spec/models/repository_spec.rb

@@ -844,6 +844,19 @@ describe Repository do
     end
   end
 
+  describe '#get_raw_changes' do
+    context `with non-UTF8 bytes in paths` do
+      let(:old_rev) { 'd0888d297eadcd7a345427915c309413b1231e65' }
+      let(:new_rev) { '19950f03c765f7ac8723a73a0599764095f52fc0' }
+      let(:changes) { repository.raw_changes_between(old_rev, new_rev) }
+
+      it 'returns the changes' do
+        expect { changes }.not_to raise_error
+        expect(changes.first.new_path.bytes).to eq("hello\x80world".bytes)
+      end
+    end
+  end
+
   describe '#create_ref' do
     it 'redirects the call to write_ref' do
       ref, ref_path = '1', '2'

spec/support/helpers/test_env.rb

@@ -64,7 +64,8 @@ module TestEnv
     'with-codeowners'                    => '219560e',
     'submodule_inside_folder'            => 'b491b92',
     'png-lfs'                            => 'fe42f41',
-    'sha-starting-with-large-number'     => '8426165'
+    'sha-starting-with-large-number'     => '8426165',
+    'invalid-utf8-diff-paths'            => '99e4853'
   }.freeze
 
   # gitlab-test-fork is a fork of gitlab-fork, but we don't necessarily