New Repository#insights_config method

Signed-off-by: Rémy Coutable <remy@rymai.me>

app/models/repository.rb

@@ -39,7 +39,8 @@ class Repository
                       changelog license_blob license_key gitignore
                       gitlab_ci_yml branch_names tag_names branch_count
                       tag_count avatar exists? root_ref has_visible_content?
-                      issue_template_names merge_request_template_names xcode_project?).freeze
+                      issue_template_names merge_request_template_names xcode_project?
+                      insights_config).freeze
   # Methods that use cache_method but only memoize the value
   MEMOIZED_CACHED_METHODS = %i(license).freeze
@@ -57,7 +58,8 @@ class Repository
     avatar: :avatar,
     issue_template: :issue_template_names,
     merge_request_template: :merge_request_template_names,
-    xcode_config: :xcode_project?
+    xcode_config: :xcode_project?,
+    insights_config: :insights_config
   }.freeze
   def initialize(full_path, project, disk_path: nil, is_wiki: false)
@@ -663,6 +665,11 @@ class Repository
   end
   cache_method :xcode_project?
+  def insights_config
+    file_on_head(:insights_config)
+  end
+  cache_method :insights_config
+
   def head_commit
     @head_commit ||= commit(self.root_ref)
   end

lib/gitlab/file_detector.rb

@@ -22,6 +22,7 @@ module Gitlab
       gitignore: '.gitignore',
       gitlab_ci: '.gitlab-ci.yml',
       route_map: '.gitlab/route-map.yml',
+      insights_config: '.gitlab/insights.yml',
       # Dependency files
       cartfile: %r{\ACartfile[^/]*\z},

spec/lib/gitlab/file_detector_spec.rb

@@ -77,6 +77,10 @@ describe Gitlab::FileDetector do
       expect(described_class.type_of('.gitlab/merge_request_templates/foo.md')).to eq(:merge_request_template)
     end
+    it 'returns the type of an Insights config file' do
+      expect(described_class.type_of('.gitlab/insights.yml')).to eq(:insights_config)
+    end
+
     it 'returns nil for an unknown file' do
       expect(described_class.type_of('foo.txt')).to be_nil
     end

spec/models/repository_spec.rb

@@ -1616,7 +1616,8 @@ describe Repository do
         :has_visible_content?,
         :issue_template_names,
         :merge_request_template_names,
-        :xcode_project?
+        :xcode_project?,
+        :insights_config
       ])
       repository.after_change_head
@@ -1882,6 +1883,26 @@ describe Repository do
     end
   end
+  describe "#insights_config", :use_clean_rails_memory_store_caching do
+    it 'returns a valid Insights config file' do
+      files = [TestBlob.new('file'), TestBlob.new('.gitlab/insights.yml')]
+
+      expect(repository.tree).to receive(:blobs).and_return(files)
+      expect(repository.insights_config.path).to eq('.gitlab/insights.yml')
+    end
+
+    it 'returns nil if does not exist' do
+      expect(repository.tree).to receive(:blobs).and_return([])
+      expect(repository.insights_config).to be_nil
+    end
+
+    it 'returns nil for an empty repository' do
+      allow(repository).to receive(:root_ref).and_raise(Gitlab::Git::Repository::NoRepository)
+
+      expect(repository.insights_config).to be_nil
+    end
+  end
+
   describe "#keep_around" do
     it "does not fail if we attempt to reference bad commit" do
       expect(repository.kept_around?('abc1234')).to be_falsey