Expire and build repository cache after project import

After a project import, there's a chance that the UI checks the
branch count before the project has been imported. This change
causes more of the keys to be flushed after an import and forces
a rebuild of the repository cache.

Closes #13518

CHANGELOG.md

@@ -13,6 +13,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 
 ## 8.13.1 (unreleased)
   - Fix error in generating labels
+  - Expire and build repository cache after project import
 
 ## 8.13.0 (2016-10-22)
 

app/models/repository.rb

@@ -419,6 +419,17 @@ class Repository
     @exists = nil
   end
 
+  # expire cache that doesn't depend on repository data (when expiring)
+  def expire_content_cache
+    expire_tags_cache
+    expire_tag_count_cache
+    expire_branches_cache
+    expire_branch_count_cache
+    expire_root_ref_cache
+    expire_emptiness_caches
+    expire_exists_cache
+  end
+
   # Runs code after a repository has been created.
   def after_create
     expire_exists_cache
@@ -473,14 +484,13 @@ class Repository
   end
 
   def before_import
-    expire_emptiness_caches
-    expire_exists_cache
+    expire_content_cache
   end
 
   # Runs code after a repository has been forked/imported.
   def after_import
-    expire_emptiness_caches
-    expire_exists_cache
+    expire_content_cache
+    build_cache
   end
 
   # Runs code after a new commit has been pushed.

spec/models/repository_spec.rb

@@ -1146,28 +1146,17 @@ describe Repository, models: true do
   end
 
   describe '#before_import' do
-    it 'flushes the emptiness cachess' do
-      expect(repository).to receive(:expire_emptiness_caches)
-
-      repository.before_import
-    end
-
-    it 'flushes the exists cache' do
-      expect(repository).to receive(:expire_exists_cache)
+    it 'flushes the repository caches' do
+      expect(repository).to receive(:expire_content_cache)
 
       repository.before_import
     end
   end
 
   describe '#after_import' do
-    it 'flushes the emptiness cachess' do
-      expect(repository).to receive(:expire_emptiness_caches)
-
-      repository.after_import
-    end
-
-    it 'flushes the exists cache' do
-      expect(repository).to receive(:expire_exists_cache)
+    it 'flushes and builds the cache' do
+      expect(repository).to receive(:expire_content_cache)
+      expect(repository).to receive(:build_cache)
 
       repository.after_import
     end