Add rake task to migrate CI tags

db/migrate/20150914215247_add_ci_tags.rb

+class AddCiTags < ActiveRecord::Migration
+  def change
+    create_table "ci_taggings", force: true do |t|
+      t.integer  "tag_id"
+      t.integer  "taggable_id"
+      t.string   "taggable_type"
+      t.integer  "tagger_id"
+      t.string   "tagger_type"
+      t.string   "context",       limit: 128
+      t.datetime "created_at"
+    end
+
+    add_index "ci_taggings", ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "ci_taggings_idx", unique: true, using: :btree
+    add_index "ci_taggings", ["taggable_id", "taggable_type", "context"], name: "index_ci_taggings_on_taggable_id_and_taggable_type_and_context", using: :btree
+
+    create_table "ci_tags", force: true do |t|
+      t.string  "name"
+      t.integer "taggings_count", default: 0
+    end
+
+    add_index "ci_tags", ["name"], name: "index_ci_tags_on_name", unique: true, using: :btree
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150902001023) do
+ActiveRecord::Schema.define(version: 20150914215247) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -223,6 +223,26 @@ ActiveRecord::Schema.define(version: 20150902001023) do
   add_index "ci_sessions", ["session_id"], name: "index_ci_sessions_on_session_id", using: :btree
   add_index "ci_sessions", ["updated_at"], name: "index_ci_sessions_on_updated_at", using: :btree
 
+  create_table "ci_taggings", force: true do |t|
+    t.integer  "tag_id"
+    t.integer  "taggable_id"
+    t.string   "taggable_type"
+    t.integer  "tagger_id"
+    t.string   "tagger_type"
+    t.string   "context",       limit: 128
+    t.datetime "created_at"
+  end
+
+  add_index "ci_taggings", ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "ci_taggings_idx", unique: true, using: :btree
+  add_index "ci_taggings", ["taggable_id", "taggable_type", "context"], name: "index_ci_taggings_on_taggable_id_and_taggable_type_and_context", using: :btree
+
+  create_table "ci_tags", force: true do |t|
+    t.string  "name"
+    t.integer "taggings_count", default: 0
+  end
+
+  add_index "ci_tags", ["name"], name: "index_ci_tags_on_name", unique: true, using: :btree
+
   create_table "ci_trigger_requests", force: true do |t|
     t.integer  "trigger_id", null: false
     t.text     "variables"

lib/tasks/ci/migrate.rake

+namespace :ci do
+  namespace :migrate do
+    def list_objects(type)
+      ids = ActiveRecord::Base.connection.select_all(
+        'select distinct taggable_id from ci_taggings where taggable_type = $1',
+        nil, [[nil, type]]
+      )
+      ids.map { |id| id['taggable_id'] }
+    end
+
+    def list_tags(type, id)
+      tags = ActiveRecord::Base.connection.select_all(
+        'select ci_tags.name from ci_tags ' +
+        'join ci_taggings on ci_tags.id = ci_taggings.tag_id ' +
+        'where taggable_type = $1 and taggable_id = $2 and context = $3',
+        nil, [[nil, type], [nil, id], [nil, 'tags']]
+      )
+      tags.map { |tag| tag['name'] }
+    end
+
+    desc 'GITLAB | Migrate CI tags'
+    task tags: :environment do
+      list_objects('Runner').each do |id|
+        runner = Ci::Runner.find_by_id(id)
+        if runner
+          tags = list_tags('Runner', id)
+          runner.update_attributes(tag_list: tags)
+        end
+      end
+
+      list_objects('Build').each do |id|
+        build = Ci::Build.find_by_id(id)
+        if build
+          tags = list_tags('Build', id)
+          build.update_attributes(tag_list: tags)
+        end
+      end
+    end
+  end
+end