Ignore when item is already unpublished.

closes #5114

Gemfile.lock

@@ -368,7 +368,7 @@ GEM
     public_suffix (6.0.0)
     puma (6.4.2)
       nio4r (~> 2.0)
-    purl_fetcher-client (1.5.2)
+    purl_fetcher-client (1.5.3)
       activesupport
       faraday (~> 2.1)
     racc (1.8.0)

app/services/publish/metadata_transfer_service.rb

@@ -109,6 +109,8 @@ def release_tags_on_success
     #
     def publish_delete_on_success
       PurlFetcher::Client::Unpublish.unpublish(druid:)
+    rescue PurlFetcher::Client::AlreadyDeletedResponseError
+      # It's fine. The object is already deleted.
     end
 
     def publish_shelve

spec/services/publish/metadata_transfer_service_spec.rb

@@ -64,26 +64,36 @@
     context 'with no world discover access in rightsMetadata' do
       let(:purl_root) { Dir.mktmpdir }
 
+      let(:druid1) { DruidTools::Druid.new cocina_object.externalIdentifier, purl_root }
+
       before do
         allow(Settings.stacks).to receive(:local_document_cache_root).and_return(purl_root)
         allow(PurlFetcher::Client::Unpublish).to receive(:unpublish)
-
-        stub_request(:delete, "example.com/purl/purls/#{druid}")
+        # create druid tree and dummy content in purl root
+        druid1.mkdir
+        File.write(File.join(druid1.path, 'tmpfile'), 'junk')
       end
 
       after do
         FileUtils.remove_entry purl_root
       end
 
       it "removes the item's content from the Purl document cache and notifies the purl service of the deletion" do
-        # create druid tree and dummy content in purl root
-        druid1 = DruidTools::Druid.new cocina_object.externalIdentifier, purl_root
-        druid1.mkdir
-        File.write(File.join(druid1.path, 'tmpfile'), 'junk')
         service.publish
         expect(File).not_to exist(druid1.path) # it should now be gone
         expect(PurlFetcher::Client::Unpublish).to have_received(:unpublish).with(druid: cocina_object.externalIdentifier)
       end
+
+      context 'when already deleted' do
+        before do
+          allow(PurlFetcher::Client::Unpublish).to receive(:unpublish).and_raise(PurlFetcher::Client::AlreadyDeletedResponseError)
+        end
+
+        it 'ignores the error' do
+          service.publish
+          expect(File).not_to exist(druid1.path) # it should now be gone
+        end
+      end
     end
 
     describe 'copies to the document cache' do