Restore snippets repositories from GitLab backups

In this commit, we add the logic to restore snippet
repositories from GitLab backups.

changelogs/unreleased/233627-fj-restore-snippets-in-backups.yml

+---
+title: Restore snippet repositories from backups
+merge_request: 43696
+author:
+type: changed

lib/backup/repositories.rb

@@ -46,6 +46,10 @@ module Backup
         restore_repository(project, Gitlab::GlRepository::DESIGN)
       end
 
+      Snippet.find_each(batch_size: 1000) do |snippet|
+        restore_repository(snippet, Gitlab::GlRepository::SNIPPET)
+      end
+
       restore_object_pools
     end
 

spec/lib/backup/repositories_spec.rb

@@ -159,12 +159,16 @@ RSpec.describe Backup::Repositories do
 
   describe '#restore' do
     let_it_be(:project) { create(:project) }
+    let_it_be(:personal_snippet) { create(:personal_snippet, author: project.owner) }
+    let_it_be(:project_snippet) { create(:project_snippet, project: project, author: project.owner) }
 
     it 'restores repositories from bundles', :aggregate_failures do
       next_path_to_bundle = [
         Rails.root.join('spec/fixtures/lib/backup/project_repo.bundle'),
         Rails.root.join('spec/fixtures/lib/backup/wiki_repo.bundle'),
-        Rails.root.join('spec/fixtures/lib/backup/design_repo.bundle')
+        Rails.root.join('spec/fixtures/lib/backup/design_repo.bundle'),
+        Rails.root.join('spec/fixtures/lib/backup/personal_snippet_repo.bundle'),
+        Rails.root.join('spec/fixtures/lib/backup/project_snippet_repo.bundle')
       ].to_enum
 
       allow_next_instance_of(described_class::BackupRestore) do |backup_restore|
@@ -178,6 +182,8 @@ RSpec.describe Backup::Repositories do
       expect(collect_commit_shas.call(project.repository)).to eq(['393a7d860a5a4c3cc736d7eb00604e3472bb95ec'])
       expect(collect_commit_shas.call(project.wiki.repository)).to eq(['c74b9948d0088d703ee1fafeddd9ed9add2901ea'])
       expect(collect_commit_shas.call(project.design_repository)).to eq(['c3cd4d7bd73a51a0f22045c3a4c871c435dc959d'])
+      expect(collect_commit_shas.call(personal_snippet.repository)).to eq(['3b3c067a3bc1d1b695b51e2be30c0f8cf698a06e'])
+      expect(collect_commit_shas.call(project_snippet.repository)).to eq(['6e44ba56a4748be361a841e759c20e421a1651a1'])
     end
 
     describe 'command failure' do
@@ -228,7 +234,9 @@ RSpec.describe Backup::Repositories do
       expect_next_instance_of(DesignManagement::Repository) do |repository|
         expect(repository).to receive(:remove)
       end
-      expect(Repository).to receive(:new).twice.and_wrap_original do |method, *original_args|
+
+      # 4 times = project repo + wiki repo + project_snippet repo + personal_snippet repo
+      expect(Repository).to receive(:new).exactly(4).times.and_wrap_original do |method, *original_args|
         repository = method.call(*original_args)
 
         expect(repository).to receive(:remove)