Remove plugin initializer and add plugins:validate rake task

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/services/system_hooks_service.rb

@@ -13,7 +13,7 @@ class SystemHooksService
     end
 
     # Execute external plugins
-    PLUGINS.each do |plugin|
+    Gitlab::Plugin.all.each do |plugin|
       begin
         plugin.new.execute(data)
       rescue => e

config/initializers/9_plugins.rb

@@ -1,29 +0,0 @@
-class PluginsSystem
-  attr_accessor :plugins, :files
-
-  def initialize
-    @files = Dir.glob(Rails.root.join('plugins', '*_plugin.rb'))
-  end
-
-  def valid_plugins
-    files.map do |file|
-      file_name = File.basename(file, '.rb')
-
-      # Just give sample data to method and expect it to not crash.
-      begin
-        klass = Object.const_get(file_name.classify)
-        klass.new.execute(Gitlab::DataBuilder::Push::SAMPLE_DATA)
-      rescue => e
-        Rails.logger.warn("GitLab -> Plugins -> #{file_name} raised an exception during boot check. #{e}")
-        next
-      else
-        Rails.logger.info "GitLab -> Plugins -> #{file_name} passed boot check"
-        klass
-      end
-    end
-  end
-end
-
-# Load external plugins from /plugins directory
-# and set into PLUGINS variable
-PLUGINS = PluginsSystem.new.valid_plugins

lib/gitlab/plugin.rb

@@ -0,0 +1,25 @@
+module Gitlab
+  module Plugin
+    def self.all
+      files.map do |file|
+        file_name = File.basename(file, '.rb')
+
+        # Just give sample data to method and expect it to not crash.
+        begin
+          klass = Object.const_get(file_name.classify)
+          klass.new.execute(Gitlab::DataBuilder::Push::SAMPLE_DATA)
+        rescue => e
+          Rails.logger.warn("GitLab -> Plugins -> #{file_name} raised an exception during boot check. #{e}")
+          next
+        else
+          Rails.logger.info "GitLab -> Plugins -> #{file_name} passed validation check"
+          klass
+        end
+      end
+    end
+
+    def self.files
+      Dir.glob(Rails.root.join('plugins', '*_plugin.rb'))
+    end
+  end
+end

lib/tasks/plugins.rake

@@ -22,4 +22,19 @@ namespace :plugins do
       puts "Failed to save #{file_path}."
     end
   end
+
+  desc 'Validate existing plugins'
+  task validate: :environment do
+    puts 'Validating plugins from /plugins directory'
+
+    Gitlab::Plugin.all.each do |plugin|
+      begin
+        plugin.new.execute(Gitlab::DataBuilder::Push::SAMPLE_DATA)
+      rescue => e
+        puts "- #{plugin} raised an exception during boot check. #{e}"
+      else
+        puts "- #{plugin} passed validation check"
+      end
+    end
+  end
 end