Add code owners metric to DevOps adoption page

It will be used to track adoption of code owners feature

Changelog: added

changelogs/unreleased/326008-add-codeowners-to-devops-adoption.yml

+---
+title: Add code owners metric to DevOps adoption page
+merge_request: 59874
+author:
+type: added

db/migrate/20210421081724_add_codeowners_devops_adoption_snapshot.rb

+# frozen_string_literal: true
+
+class AddCodeownersDevopsAdoptionSnapshot < ActiveRecord::Migration[6.0]
+  def change
+    add_column :analytics_devops_adoption_snapshots, :total_projects_count, :integer
+    add_column :analytics_devops_adoption_snapshots, :code_owners_used_count, :integer
+  end
+end

db/schema_migrations/20210421081724

+9049dc22e97261115ba935a059beb5b4f2eb810f1fdcc0881f96d4b6a501ab09
\ No newline at end of file

db/structure.sql

@@ -9084,7 +9084,9 @@ CREATE TABLE analytics_devops_adoption_snapshots (
     pipeline_succeeded boolean NOT NULL,
     deploy_succeeded boolean NOT NULL,
     security_scan_succeeded boolean NOT NULL,
-    end_time timestamp with time zone NOT NULL
+    end_time timestamp with time zone NOT NULL,
+    total_projects_count integer,
+    code_owners_used_count integer
 );
 
 CREATE SEQUENCE analytics_devops_adoption_snapshots_id_seq

doc/api/graphql/reference/index.md

@@ -7810,6 +7810,7 @@ Snapshot.
 
 | Name | Type | Description |
 | ---- | ---- | ----------- |
+| <a id="devopsadoptionsnapshotcodeownersusedcount"></a>`codeOwnersUsedCount` | [`Int`](#int) | Total number of projects with existing CODEOWNERS file. |
 | <a id="devopsadoptionsnapshotdeploysucceeded"></a>`deploySucceeded` | [`Boolean!`](#boolean) | At least one deployment succeeded. |
 | <a id="devopsadoptionsnapshotendtime"></a>`endTime` | [`Time!`](#time) | The end time for the snapshot where the data points were collected. |
 | <a id="devopsadoptionsnapshotissueopened"></a>`issueOpened` | [`Boolean!`](#boolean) | At least one issue was opened. |
@@ -7820,6 +7821,7 @@ Snapshot.
 | <a id="devopsadoptionsnapshotrunnerconfigured"></a>`runnerConfigured` | [`Boolean!`](#boolean) | At least one runner was used. |
 | <a id="devopsadoptionsnapshotsecurityscansucceeded"></a>`securityScanSucceeded` | [`Boolean!`](#boolean) | At least one security scan succeeded. |
 | <a id="devopsadoptionsnapshotstarttime"></a>`startTime` | [`Time!`](#time) | The start time for the snapshot where the data points were collected. |
+| <a id="devopsadoptionsnapshottotalprojectscount"></a>`totalProjectsCount` | [`Int`](#int) | Total number of projects. |
 
 ### `DiffPosition`
 

ee/app/graphql/types/admin/analytics/devops_adoption/snapshot_type.rb

@@ -23,6 +23,10 @@ module Types
                 description: 'At least one deployment succeeded.'
           field :security_scan_succeeded, GraphQL::BOOLEAN_TYPE, null: false,
                 description: 'At least one security scan succeeded.'
+          field :code_owners_used_count, GraphQL::INT_TYPE, null: true,
+                description: 'Total number of projects with existing CODEOWNERS file.'
+          field :total_projects_count, GraphQL::INT_TYPE, null: true,
+                description: 'Total number of projects.'
           field :recorded_at, Types::TimeType, null: false,
                 description: 'The time the snapshot was recorded.'
           field :start_time, Types::TimeType, null: false,

ee/app/models/analytics/devops_adoption/snapshot.rb

@@ -13,6 +13,8 @@ class Analytics::DevopsAdoption::Snapshot < ApplicationRecord
   validates :pipeline_succeeded, inclusion: { in: [true, false] }
   validates :deploy_succeeded, inclusion: { in: [true, false] }
   validates :security_scan_succeeded, inclusion: { in: [true, false] }
+  validates :total_projects_count, numericality: { only_integer: true, greater_than_or_equal_to: 0 }, allow_nil: true
+  validates :code_owners_used_count, numericality: { only_integer: true, greater_than_or_equal_to: 0 }, allow_nil: true
 
   scope :latest_snapshot_for_segment_ids, -> (ids) do
     inner_select = model

ee/app/models/ee/repository.rb

@@ -81,7 +81,7 @@ module EE
       ::Geo::RepositoryUpdatedService.new(self).execute
     end
 
-    def code_owners_blob(ref: 'HEAD')
+    def code_owners_blob(ref:)
       possible_code_owner_blobs = ::Gitlab::CodeOwners::FILE_PATHS.map { |path| [ref, path] }
       blobs_at(possible_code_owner_blobs).compact.first
     end

ee/app/services/analytics/devops_adoption/snapshots/update_service.rb

@@ -4,19 +4,12 @@ module Analytics
   module DevopsAdoption
     module Snapshots
       class UpdateService
-        ALLOWED_ATTRIBUTES = [
+        ALLOWED_ATTRIBUTES = ([
           :segment,
           :segment_id,
           :end_time,
-          :recorded_at,
-          :issue_opened,
-          :merge_request_opened,
-          :merge_request_approved,
-          :runner_configured,
-          :pipeline_succeeded,
-          :deploy_succeeded,
-          :security_scan_succeeded
-        ].freeze
+          :recorded_at
+        ] + SnapshotCalculator::ADOPTION_METRICS).freeze
 
         def initialize(snapshot:, params: {})
           @snapshot = snapshot

ee/config/feature_flags/development/analytics_devops_adoption_codeowners.yml

+---
+name: analytics_devops_adoption_codeowners
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/59874
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/328542
+milestone: '13.12'
+type: development
+group: group::optimize
+default_enabled: true

ee/db/fixtures/development/31_devops_adoption.rb

@@ -35,6 +35,8 @@ Gitlab::Seeder.quiet do
           pipeline_succeeded: booleans.sample,
           deploy_succeeded: booleans.sample,
           security_scan_succeeded: booleans.sample,
+          code_owners_used_count: rand(10),
+          total_projects_count: rand(10..19),
           recorded_at: [end_time + 1.day, Time.zone.now].min,
           end_time: end_time
         }

ee/lib/analytics/devops_adoption/snapshot_calculator.rb

@@ -5,7 +5,22 @@ module Analytics
     class SnapshotCalculator
       attr_reader :segment, :range_end, :range_start, :snapshot
 
-      ADOPTION_FLAGS = %i[issue_opened merge_request_opened merge_request_approved runner_configured pipeline_succeeded deploy_succeeded security_scan_succeeded].freeze
+      BOOLEAN_METRICS = [
+        :issue_opened,
+        :merge_request_opened,
+        :merge_request_approved,
+        :runner_configured,
+        :pipeline_succeeded,
+        :deploy_succeeded,
+        :security_scan_succeeded
+      ].freeze
+
+      NUMERIC_METRICS = [
+        :code_owners_used_count,
+        :total_projects_count
+      ].freeze
+
+      ADOPTION_METRICS = BOOLEAN_METRICS + NUMERIC_METRICS
 
       def initialize(segment:, range_end:, snapshot: nil)
         @segment = segment
@@ -17,8 +32,12 @@ module Analytics
       def calculate
         params = { recorded_at: Time.zone.now, end_time: range_end, segment: segment }
 
-        ADOPTION_FLAGS.each do |flag|
-          params[flag] = snapshot&.public_send(flag) || send(flag) # rubocop:disable GitlabSecurity/PublicSend
+        BOOLEAN_METRICS.each do |metric|
+          params[metric] = snapshot&.public_send(metric) || send(metric) # rubocop:disable GitlabSecurity/PublicSend
+        end
+
+        NUMERIC_METRICS.each do |metric|
+          params[metric] = send(metric) # rubocop:disable GitlabSecurity/PublicSend
         end
 
         params
@@ -32,10 +51,14 @@ module Analytics
 
       # rubocop: disable CodeReuse/ActiveRecord
       def snapshot_project_ids
-        @snapshot_project_ids ||= Project.in_namespace(snapshot_groups).pluck(:id)
+        @snapshot_project_ids ||= snapshot_projects.pluck(:id)
       end
       # rubocop: enable CodeReuse/ActiveRecord
 
+      def snapshot_projects
+        @snapshot_projects ||= Project.in_namespace(snapshot_groups)
+      end
+
       def snapshot_merge_requests
         @snapshot_merge_requests ||= MergeRequest.of_projects(snapshot_project_ids)
       end
@@ -76,6 +99,18 @@ module Analytics
           .exists?
       end
       # rubocop: enable CodeReuse/ActiveRecord
+
+      def total_projects_count
+        snapshot_project_ids.count
+      end
+
+      def code_owners_used_count
+        return unless Feature.enabled?(:analytics_devops_adoption_codeowners, segment.namespace, default_enabled: :yaml)
+
+        snapshot_projects.count do |project|
+          !Gitlab::CodeOwners::Loader.new(project, project.default_branch).empty_code_owners?
+        end
+      end
     end
   end
 end

ee/lib/gitlab/code_owners/loader.rb

@@ -5,7 +5,7 @@ module Gitlab
     class Loader
       include ::Gitlab::Utils::StrongMemoize
 
-      def initialize(project, ref, paths)
+      def initialize(project, ref, paths = [])
         @project = project
         @ref = ref
         @paths = Array(paths)

ee/spec/lib/analytics/devops_adoption/snapshot_calculator_spec.rb

@@ -128,19 +128,53 @@ RSpec.describe Analytics::DevopsAdoption::SnapshotCalculator do
     it { is_expected.to eq false }
   end
 
-  context 'when snapshot already exists' do
-    let_it_be(:snapshot) { create :devops_adoption_snapshot, segment: segment, issue_opened: true, merge_request_opened: false }
+  describe 'total_projects_count' do
+    subject { data[:total_projects_count] }
+
+    it { is_expected.to eq 2 }
+  end
+
+  describe 'code_owners_used_count' do
+    let!(:project_with_code_owners) { create(:project, :repository, group: subgroup)}
+
+    subject { data[:code_owners_used_count] }
+
+    before do
+      allow_any_instance_of(Project).to receive(:default_branch).and_return('with-codeowners') # rubocop:disable RSpec/AnyInstanceOf
+    end
+
+    it { is_expected.to eq 1 }
+
+    context 'when feature is disabled' do
+      before do
+        stub_feature_flags(analytics_devops_adoption_codeowners: false)
+      end
 
+      it { is_expected.to eq nil }
+    end
+  end
+
+  context 'when snapshot already exists' do
     subject(:data) { described_class.new(segment: segment, range_end: range_end, snapshot: snapshot).calculate }
 
-    let!(:fresh_merge_request) { create(:merge_request, source_project: project, created_at: 3.weeks.ago(range_end)) }
+    let(:snapshot) { create :devops_adoption_snapshot, segment: segment, issue_opened: true, merge_request_opened: false, total_projects_count: 1}
+
+    context 'for boolean metrics' do
+      let!(:fresh_merge_request) { create(:merge_request, source_project: project, created_at: 3.weeks.ago(range_end)) }
+
+      it 'calculates metrics which are not true yet' do
+        expect(data[:merge_request_opened]).to eq true
+      end
 
-    it 'calculates metrics which are not true yet' do
-      expect(data[:merge_request_opened]).to eq true
+      it "doesn't change metrics which are true already" do
+        expect(data[:issue_opened]).to eq true
+      end
     end
 
-    it "doesn't change metrics which are true already" do
-      expect(data[:issue_opened]).to eq true
+    context 'for numeric metrics' do
+      it 'always recalculates metric' do
+        expect(data[:total_projects_count]).to eq 2
+      end
     end
   end
 end

ee/spec/models/repository_spec.rb

@@ -173,12 +173,12 @@ RSpec.describe Repository do
 
     it 'requests the CODOWNER blobs in batch in the correct order' do
       expect(repository).to receive(:blobs_at)
-                              .with([%w(HEAD CODEOWNERS),
-                                     %w(HEAD docs/CODEOWNERS),
-                                     %w(HEAD .gitlab/CODEOWNERS)])
+                              .with([%w(master CODEOWNERS),
+                                     %w(master docs/CODEOWNERS),
+                                     %w(master .gitlab/CODEOWNERS)])
                               .and_call_original
 
-      repository.code_owners_blob
+      repository.code_owners_blob(ref: 'master')
     end
   end
 

ee/spec/services/analytics/devops_adoption/snapshots/create_service_spec.rb

@@ -7,9 +7,14 @@ RSpec.describe Analytics::DevopsAdoption::Snapshots::CreateService do
 
   let(:snapshot) { service_response.payload[:snapshot] }
   let(:params) do
-    params = Analytics::DevopsAdoption::SnapshotCalculator::ADOPTION_FLAGS.each_with_object({}) do |attribute, result|
-      result[attribute] = rand(2).odd?
+    params = {}
+    Analytics::DevopsAdoption::SnapshotCalculator::BOOLEAN_METRICS.each.with_index do |attribute, i|
+      params[attribute] = i.odd?
     end
+    Analytics::DevopsAdoption::SnapshotCalculator::NUMERIC_METRICS.each.with_index do |attribute, i|
+      params[attribute] = i
+    end
+
     params[:recorded_at] = Time.zone.now
     params[:end_time] = 1.month.ago.end_of_month
     params[:segment] = segment

ee/spec/services/analytics/devops_adoption/snapshots/update_service_spec.rb

@@ -9,8 +9,12 @@ RSpec.describe Analytics::DevopsAdoption::Snapshots::UpdateService do
   let(:segment) { create(:devops_adoption_segment, last_recorded_at: 1.year.ago) }
 
   let(:params) do
-    params = Analytics::DevopsAdoption::SnapshotCalculator::ADOPTION_FLAGS.each_with_object({}) do |attribute, result|
-      result[attribute] = rand(2).odd?
+    params = {}
+    Analytics::DevopsAdoption::SnapshotCalculator::BOOLEAN_METRICS.each.with_index do |attribute, i|
+      params[attribute] = i.odd?
+    end
+    Analytics::DevopsAdoption::SnapshotCalculator::NUMERIC_METRICS.each.with_index do |attribute, i|
+      params[attribute] = i
     end
     params[:recorded_at] = Time.zone.now
     params[:segment] = segment