Merge branch 'sh-speed-up-export' into 'master'

Speed up project exports by moving the archive to the cache dir

See merge request gitlab-org/gitlab!78986

app/uploaders/import_export_uploader.rb

@@ -12,6 +12,10 @@ class ImportExportUploader < AttachmentUploader
   end
 
   def move_to_cache
+    # Exports create temporary files that we can safely move.
+    # Imports may be from project templates that we want to copy.
+    return super if mounted_as == :export_file
+
     false
   end
 

spec/uploaders/import_export_uploader_spec.rb

@@ -10,6 +10,20 @@ RSpec.describe ImportExportUploader do
   subject { described_class.new(model, :import_file) }
 
   context 'local store' do
+    describe '#move_to_cache' do
+      it 'returns false' do
+        expect(subject.move_to_cache).to be false
+      end
+
+      context 'with project export' do
+        subject { described_class.new(model, :export_file) }
+
+        it 'returns true' do
+          expect(subject.move_to_cache).to be true
+        end
+      end
+    end
+
     describe '#move_to_store' do
       it 'returns true' do
         expect(subject.move_to_store).to be true
@@ -33,6 +47,20 @@ RSpec.describe ImportExportUploader do
       let(:fixture) { File.join('spec', 'fixtures', 'group_export.tar.gz') }
     end
 
+    describe '#move_to_cache' do
+      it 'returns false' do
+        expect(subject.move_to_cache).to be false
+      end
+
+      context 'with project export' do
+        subject { described_class.new(model, :export_file) }
+
+        it 'returns true' do
+          expect(subject.move_to_cache).to be false
+        end
+      end
+    end
+
     describe '#move_to_store' do
       it 'returns false' do
         expect(subject.move_to_store).to be false