Instrument job inclusion in the pipeline logger

With this instrumentation we can observe how many builds a pipeline
could have and how long it takes to compute if they should be persisted.

lib/gitlab/ci/pipeline/chain/seed.rb

@@ -53,13 +53,18 @@ module Gitlab
           end
 
           def context
-            Gitlab::Ci::Pipeline::Seed::Context.new(pipeline, root_variables: root_variables)
+            Gitlab::Ci::Pipeline::Seed::Context.new(
+              pipeline,
+              root_variables: root_variables,
+              logger: logger
+            )
           end
 
           def root_variables
             logger.instrument(:pipeline_seed_merge_variables) do
               ::Gitlab::Ci::Variables::Helpers.merge_variables(
-                @command.yaml_processor_result.root_variables, @command.workflow_rules_result.variables
+                @command.yaml_processor_result.root_variables,
+                @command.workflow_rules_result.variables
               )
             end
           end

lib/gitlab/ci/pipeline/logger.rb

@@ -58,7 +58,6 @@ module Gitlab
           if pipeline.persisted?
             attributes[:pipeline_builds_tags_count] = pipeline.tags_count
             attributes[:pipeline_builds_distinct_tags_count] = pipeline.distinct_tags_count
-
             attributes[:pipeline_id] = pipeline.id
           end
 

lib/gitlab/ci/pipeline/seed/build.rb

@@ -41,6 +41,7 @@ module Gitlab
 
           def included?
             strong_memoize(:inclusion) do
+              logger.instrument(:pipeline_seed_build_inclusion) do
                 if @using_rules
                   rules_result.pass?
                 elsif @using_only || @using_except
@@ -50,6 +51,7 @@ module Gitlab
                 end
               end
             end
+          end
 
           def errors
             return unless included?
@@ -122,6 +124,8 @@ module Gitlab
 
           private
 
+          delegate :logger, to: :@context
+
           def all_of_only?
             @only.all? { |spec| spec.satisfied_by?(@pipeline, evaluate_context) }
           end

lib/gitlab/ci/pipeline/seed/context.rb

@@ -5,11 +5,18 @@ module Gitlab
     module Pipeline
       module Seed
         class Context
-          attr_reader :pipeline, :root_variables
+          attr_reader :pipeline, :root_variables, :logger
 
-          def initialize(pipeline, root_variables: [])
+          def initialize(pipeline, root_variables: [], logger: nil)
             @pipeline = pipeline
             @root_variables = root_variables
+            @logger = logger || build_logger
+          end
+
+          private
+
+          def build_logger
+            ::Gitlab::Ci::Pipeline::Logger.new(project: pipeline.project)
           end
         end
       end

spec/lib/gitlab/ci/pipeline/seed/build_spec.rb

@@ -8,7 +8,7 @@ RSpec.describe Gitlab::Ci::Pipeline::Seed::Build do
 
   let(:pipeline) { build(:ci_empty_pipeline, project: project, sha: head_sha) }
   let(:root_variables) { [] }
-  let(:seed_context) { double(pipeline: pipeline, root_variables: root_variables) }
+  let(:seed_context) { Gitlab::Ci::Pipeline::Seed::Context.new(pipeline, root_variables: root_variables) }
   let(:attributes) { { name: 'rspec', ref: 'master', scheduling_type: :stage, when: 'on_success' } }
   let(:previous_stages) { [] }
   let(:current_stage) { double(seeds_names: [attributes[:name]]) }

spec/lib/gitlab/ci/pipeline/seed/pipeline_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe Gitlab::Ci::Pipeline::Seed::Pipeline do
   let_it_be(:project) { create(:project, :repository) }
   let_it_be(:pipeline) { create(:ci_pipeline, project: project) }
 
-  let(:seed_context) { double(pipeline: pipeline, root_variables: []) }
+  let(:seed_context) { Gitlab::Ci::Pipeline::Seed::Context.new(pipeline, root_variables: []) }
 
   let(:stages_attributes) do
     [

spec/lib/gitlab/ci/pipeline/seed/stage_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe Gitlab::Ci::Pipeline::Seed::Stage do
   let(:project) { create(:project, :repository) }
   let(:pipeline) { create(:ci_empty_pipeline, project: project) }
   let(:previous_stages) { [] }
-  let(:seed_context) { double(pipeline: pipeline, root_variables: []) }
+  let(:seed_context) { Gitlab::Ci::Pipeline::Seed::Context.new(pipeline, root_variables: []) }
 
   let(:attributes) do
     { name: 'test',

spec/services/ci/create_pipeline_service/logger_spec.rb

@@ -36,6 +36,7 @@ RSpec.describe Ci::CreatePipelineService do
         'pipeline_creation_duration_s' => counters,
         'pipeline_size_count' => counters,
         'pipeline_step_gitlab_ci_pipeline_chain_seed_duration_s' => counters,
+        'pipeline_seed_build_inclusion_duration_s' => counters,
         'pipeline_builds_tags_count' => a_kind_of(Numeric),
         'pipeline_builds_distinct_tags_count' => a_kind_of(Numeric)
       }