Use repository and redis cache

app/controllers/projects/issues_controller.rb

@@ -51,7 +51,7 @@ class Projects::IssuesController < Projects::ApplicationController
     @issue = @noteable = @project.issues.new(issue_params)
-    @issue.description = @project.repository_issues_template
+    @issue.description = @project.repository.issues_template
     respond_with(@issue)
   end

app/models/project.rb

@@ -929,16 +929,4 @@ class Project < ActiveRecord::Base
   def wiki
     @wiki ||= ProjectWiki.new(self, self.owner)
   end
-
-  def repository_issues_template
-    repository.blob_at_branch('HEAD', 'ISSUE_TEMPLATE').data
-  rescue
-    nil
-  end
-
-  def repository_merge_requests_template
-    repository.blob_at_branch('HEAD', 'MERGE_REQUESTS_TEMPLATE').data
-  rescue
-    nil
-  end
 end

app/models/repository.rb

@@ -375,6 +375,26 @@ class Repository
     end
   end
+  def issue_template
+    cache.fetch(:issue_template) do
+      [nil, '.gitlab', '.github'].each do |path|
+        tree(:head, path).blobs.find do |file|
+          file.name =~ /\Aissue_template(?\.txt)(?\.md)\z/i
+        end
+      end
+    end
+  end
+
+  def merge_request_template
+    cache.fetch(:merge_request_template) do
+      [nil, '.gitlab', '.github'].each do |path|
+        tree(:head, path).blobs.find do |file|
+          file.name =~ /\Amerge_request_template(?\.txt)(?\.md)\z/i
+        end
+      end
+    end
+  end
+
   def head_commit
     @head_commit ||= commit(self.root_ref)
   end

app/services/merge_requests/build_service.rb

@@ -61,7 +61,7 @@ module MergeRequests
         merge_request.title = merge_request.source_branch.titleize.humanize
       end
-      merge_request.description = merge_request.target_project.repository_merge_requests_template
+      merge_request.description = merge_request.target_project.repository.merge_request_template
       merge_request
     end