Export pipeline stages in import/export feature

lib/gitlab/import_export/import_export.yml

@@ -38,6 +38,7 @@ project_tree:
     - notes:
       - :author
       - :events
+    - :stages
     - :statuses
   - :triggers
   - :pipeline_schedules

lib/gitlab/import_export/relation_factory.rb

@@ -3,6 +3,7 @@ module Gitlab
     class RelationFactory
       OVERRIDES = { snippets: :project_snippets,
                     pipelines: 'Ci::Pipeline',
+                    stages: 'Ci::Stage',
                     statuses: 'commit_status',
                     triggers: 'Ci::Trigger',
                     pipeline_schedules: 'Ci::PipelineSchedule',

spec/lib/gitlab/import_export/all_models.yml

@@ -91,6 +91,7 @@ merge_request_diff:
 pipelines:
 - project
 - user
+- stages
 - statuses
 - builds
 - trigger_requests
@@ -104,9 +105,15 @@ pipelines:
 - artifacts
 - pipeline_schedule
 - merge_requests
+stages:
+- project
+- pipeline
+- statuses
+- builds
 statuses:
 - project
 - pipeline
+- stage
 - user
 - auto_canceled_by
 variables:

spec/lib/gitlab/import_export/safe_model_attributes.yml

@@ -191,6 +191,13 @@ Ci::Pipeline:
 - lock_version
 - auto_canceled_by_id
 - pipeline_schedule_id
+Ci::Stage:
+- id
+- name
+- project_id
+- pipeline_id
+- created_at
+- updated_at
 CommitStatus:
 - id
 - project_id