Move importers to lib folder

This moves our metric importers into the lib folder. This will allow
them to be autoloaded instead of having to explicitly require them.

5 files changed, 8 insertions, 139 deletions

diff --git a/db/importers/common_metrics.rb b/db/importers/common_metrics.rb
deleted file mode 100644
index 411d366ef83..00000000000
--- a/db/importers/common_metrics.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-require_relative './common_metrics/importer'
-require_relative './common_metrics/prometheus_metric'
-require_relative './common_metrics/prometheus_metric_enums'
-
-require Rails.root.join('ee', 'db', 'importers', 'common_metrics') if Gitlab.ee?
-
-module Importers
-  module CommonMetrics
-  end
-
-  # Patch to preserve old CommonMetricsImporter api
-  module CommonMetricsImporter
-    def self.new(*args)
-      Importers::CommonMetrics::Importer.new(*args)
-    end
-  end
-end
diff --git a/db/importers/common_metrics/importer.rb b/db/importers/common_metrics/importer.rb
deleted file mode 100644
index 24149fbbea6..00000000000
--- a/db/importers/common_metrics/importer.rb
+++ /dev/null
@@ -1,76 +0,0 @@
-# frozen_string_literal: true
-
-module Importers
-  module CommonMetrics
-    class Importer
-      MissingQueryId = Class.new(StandardError)
-
-      attr_reader :content
-
-      def initialize(filename = 'common_metrics.yml')
-        @content = YAML.load_file(Rails.root.join('config', 'prometheus', filename))
-      end
-
-      def execute
-        PrometheusMetric.reset_column_information
-
-        process_content do |id, attributes|
-          find_or_build_metric!(id)
-            .update!(**attributes)
-        end
-      end
-
-      private
-
-      def process_content(&blk)
-        content['panel_groups'].map do |group|
-          process_group(group, &blk)
-        end
-      end
-
-      def process_group(group, &blk)
-        attributes = {
-          group: find_group_title_key(group['group'])
-        }
-
-        group['panels'].map do |panel|
-          process_panel(panel, attributes, &blk)
-        end
-      end
-
-      def process_panel(panel, attributes, &blk)
-        attributes = attributes.merge(
-          title: panel['title'],
-          y_label: panel['y_label'])
-
-        panel['metrics'].map do |metric_details|
-          process_metric_details(metric_details, attributes, &blk)
-        end
-      end
-
-      def process_metric_details(metric_details, attributes, &blk)
-        attributes = attributes.merge(
-          legend: metric_details['label'],
-          query: metric_details['query_range'],
-          unit: metric_details['unit'])
-
-        yield(metric_details['id'], attributes)
-      end
-
-      def find_or_build_metric!(id)
-        raise MissingQueryId unless id
-
-        PrometheusMetric.common.find_by(identifier: id) ||
-          PrometheusMetric.new(common: true, identifier: id)
-      end
-
-      def find_group_title_key(title)
-        PrometheusMetricEnums.groups[find_group_title(title)]
-      end
-
-      def find_group_title(title)
-        PrometheusMetricEnums.group_titles.invert[title]
-      end
-    end
-  end
-end
diff --git a/db/importers/common_metrics/prometheus_metric.rb b/db/importers/common_metrics/prometheus_metric.rb
deleted file mode 100644
index 9149549c750..00000000000
--- a/db/importers/common_metrics/prometheus_metric.rb
+++ /dev/null
@@ -1,8 +0,0 @@
-module Importers
-  module CommonMetrics
-    class PrometheusMetric < ActiveRecord::Base
-      enum group: PrometheusMetricEnums.groups
-      scope :common, -> { where(common: true) }
-    end
-  end
-end
diff --git a/db/importers/common_metrics/prometheus_metric_enums.rb b/db/importers/common_metrics/prometheus_metric_enums.rb
deleted file mode 100644
index 50a1081a629..00000000000
--- a/db/importers/common_metrics/prometheus_metric_enums.rb
+++ /dev/null
@@ -1,36 +0,0 @@
-module Importers
-  module CommonMetrics
-    module PrometheusMetricEnums
-      def self.groups
-        {
-          # built-in groups
-          nginx_ingress_vts: -1,
-          ha_proxy: -2,
-          aws_elb: -3,
-          nginx: -4,
-          kubernetes: -5,
-          nginx_ingress: -6,
-
-          # custom groups
-          business: 0,
-          response: 1,
-          system: 2
-        }
-      end
-
-      def self.group_titles
-        {
-          business: _('Business metrics (Custom)'),
-          response: _('Response metrics (Custom)'),
-          system: _('System metrics (Custom)'),
-          nginx_ingress_vts: _('Response metrics (NGINX Ingress VTS)'),
-          nginx_ingress: _('Response metrics (NGINX Ingress)'),
-          ha_proxy: _('Response metrics (HA Proxy)'),
-          aws_elb: _('Response metrics (AWS ELB)'),
-          nginx: _('Response metrics (NGINX)'),
-          kubernetes: _('System metrics (Kubernetes)')
-        }
-      end
-    end
-  end
-end
diff --git a/db/importers/common_metrics_importer.rb b/db/importers/common_metrics_importer.rb
index cf5f5e181de..a2e3996a123 100644
--- a/db/importers/common_metrics_importer.rb
+++ b/db/importers/common_metrics_importer.rb
@@ -1,3 +1,9 @@
-# This functionality has been moved to the common_metrics module.
+# This functionality has been moved to the lib/gitlab/importers/common_metrics module.
 # This is here only to preserve existing ::Importers::CommonMetricsImporter api
-require_relative './common_metrics'
+module Importers
+  module CommonMetricsImporter
+    def self.new(*args)
+      Gitlab::Importers::CommonMetrics::Importer.new(*args)
+    end
+  end
+end