Adds a way to start multiple manual jobs in stage

- Adds an endpoint on PipelinesController
- Adds a service that iterates over every build in a stage and
plays it.
- Includes 'play_manual' details on EntitySerializer
- Builds a new Stage state: PlayManual. An stage can take this status if
it has manual builds or an skipped, scheduled or manual status
- Includes FE modifications and specs

3 files changed, 12 insertions, 0 deletions

diff --git a/app/models/ci/legacy_stage.rb b/app/models/ci/legacy_stage.rb
index 96dbc7b6895..930c8a71453 100644
--- a/app/models/ci/legacy_stage.rb
+++ b/app/models/ci/legacy_stage.rb
@@ -58,5 +58,9 @@ module Ci
         statuses.latest.failed_but_allowed.any?
       end
     end
+
+    def manual_playable?
+      %[manual scheduled skipped].include?(status.to_s)
+    end
   end
 end
diff --git a/app/models/ci/pipeline.rb b/app/models/ci/pipeline.rb
index 2b7835d7fab..80401ca0a1e 100644
--- a/app/models/ci/pipeline.rb
+++ b/app/models/ci/pipeline.rb
@@ -771,6 +771,10 @@ module Ci
       Gitlab::Utils.slugify(source_ref.to_s)
     end
 
+    def find_stage_by_name!(name)
+      stages.find_by!(name: name)
+    end
+
     private
 
     def ci_yaml_from_repo
diff --git a/app/models/ci/stage.rb b/app/models/ci/stage.rb
index b25b0369666..d90339d90dc 100644
--- a/app/models/ci/stage.rb
+++ b/app/models/ci/stage.rb
@@ -120,5 +120,9 @@ module Ci
         .new(self, current_user)
         .fabricate!
     end
+
+    def manual_playable?
+      blocked? || skipped?
+    end
   end
 end