Add some minor improvements to pipeline creation chain

app/services/ci/create_pipeline_service.rb

@@ -15,7 +15,7 @@ module Ci
         ref: ref,
         sha: sha,
         before_sha: before_sha,
-        tag: tag?,
+        tag: tag_exists?,
         trigger_requests: Array(trigger_request),
         user: current_user,
         pipeline_schedule: schedule,
@@ -88,20 +88,14 @@ module Ci
       params[:ref]
     end
 
-    def tag?
-      return @is_tag if defined?(@is_tag)
-
-      @is_tag = project.repository.tag_exists?(ref)
+    def tag_exists?
+      project.repository.tag_exists?(ref)
     end
 
     def ref
       @ref ||= Gitlab::Git.ref_name(origin_ref)
     end
 
-    def valid_sha?
-      origin_sha && origin_sha != Gitlab::Git::BLANK_SHA
-    end
-
     def pipeline_created_counter
       @pipeline_created_counter ||= Gitlab::Metrics
         .counter(:pipelines_created_total, "Counter of pipelines created")

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

@@ -18,7 +18,7 @@ module Gitlab
 
               break if step.break?
 
-              @completed << true
+              @completed << step
             end
 
             @pipeline.tap do
@@ -27,8 +27,7 @@ module Gitlab
           end
 
           def complete?
-            @completed.size == @sequence.size &&
-              @completed.all?
+            @completed.size == @sequence.size
           end
         end
       end

lib/gitlab/ci/pipeline/chain/validate/repository.rb

@@ -14,8 +14,6 @@ module Gitlab
               ## TODO, we check commit in the service, that is why
               # there is no repository access here.
               #
-              # Should we validate repository before building a pipeline?
-              #
               unless pipeline.sha
                 return error('Commit not found')
               end