Decouple pipeline stage seeds from building environments

app/services/ci/create_pipeline_stages_service.rb

@@ -3,17 +3,7 @@ module Ci
     def execute(pipeline)
       pipeline.stage_seeds.each do |seed|
         seed.user = current_user
-
-        seed.create! do |build|
-          ##
-          # Create the environment before the build starts. This sets its slug and
-          # makes it available as an environment variable
-          #
-          if build.has_environment?
-            environment_name = build.expanded_environment_name
-            project.environments.find_or_create_by(name: environment_name)
-          end
-        end
+        seed.create!
       end
     end
   end

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

@@ -14,6 +14,19 @@ module Gitlab
               ::Ci::CreatePipelineStagesService
                 .new(project, current_user)
                 .execute(pipeline)
+
+              # TODO populate environments with find_or_initialize_by in the chain too.
+
+              ##
+              # Create the environment before the build starts. This sets its slug and
+              # makes it available as an environment variable
+              #
+              pipeline.builds.each do |build|
+                if build.has_environment?
+                  environment_name = build.expanded_environment_name
+                  project.environments.find_or_create_by(name: environment_name)
+                end
+              end
             end
           rescue ActiveRecord::RecordInvalid => e
             error("Failed to persist the pipeline: #{e}")

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

@@ -19,7 +19,9 @@ module Gitlab
           end
 
           def attributes
-            { name: @name, pipeline: @pipeline, project: @pipeline.project }
+            { name: @name,
+              pipeline: @pipeline,
+              project: @pipeline.project }
           end
 
           # TODO decouple
@@ -43,10 +45,6 @@ module Gitlab
               @pipeline.stages << stage
 
               stage.save!
-
-              stage.builds.each do |build|
-                yield build if block_given?
-              end
             end
           end
         end

lib/gitlab/ci/yaml_processor.rb

@@ -73,8 +73,10 @@ module Gitlab
         seeds = @stages.uniq.map do |stage|
           builds = pipeline_stage_builds(stage, pipeline)
 
+          if builds.any?
             Gitlab::Ci::Pipeline::Seed::Stage
-            .new(pipeline, stage, builds) if builds.any?
+              .new(pipeline, stage, builds)
+          end
         end
 
         seeds.compact