Update lib/sparkline_hook_listener.rb, lib/settings_controller_patch.rb,...

Update lib/sparkline_hook_listener.rb, lib/settings_controller_patch.rb, lib/sparkline_projects_helper_patch.rb, init.rb files
Deleted lib/patches/projects_helper_patch.rb, lib/patches/settings_controller_patch.rb files

init.rb

+require 'redmine'
+
 Redmine::Plugin.register :sparkline do
   name 'Sparkline plugin'
   author 'Sperling'
@@ -21,4 +23,10 @@ Redmine::Plugin.register :sparkline do
      }
   end
 
+  Rails.configuration.to_prepare do
+    require_dependency 'projects_helper'
+    unless ProjectsHelper.included_modules.include? SparklineProjectsHelperPatch
+      ProjectsHelper.send(:include, SparklineProjectsHelperPatch)
+    end
+  end
 end

lib/patches/projects_helper_patch.rb

-# frozen_string_literal: true
-
-# Redmine - project management software
-# Copyright (C) 2006-2019  Jean-Philippe Lang
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 2
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-
-
-module ProjectsHelperPatch
-  def self.included(base)
-    # :nodoc:
-    base.extend(ClassMethods)
-
-    base.send(:include, InstanceMethods)
-    # Same as typing in the class
-    base.class_eval do
-      unloadable # Send unloadable so it will not be unloaded in development
-
-      alias_method :project_settings_tabs_without_sparkline, :project_settings_tabs
-      alias_method :project_settings_tabs, :project_settings_tabs_with_sparkline
-    end
-  end
-
-  module ClassMethods
-  end
-
-  module InstanceMethods
-    def project_settings_tabs_with_sparkline
-      tabs = project_settings_tabs_without_sparkline
-      if @project.enabled_module(:sparkline)
-        tabs.push ( {:name => 'sparkline', :action => :sparkline, :partial => 'settings/plugin_sparkline', :label => :sparkline})
-      end
-      tabs
-    end
-  end
-end
-
-
-
-unless ProjectsHelper.included_modules.include? ProjectsHelperPatch
-  ProjectsHelper.send(:include, ProjectsHelperPatch)
-end

lib/patches/settings_controller_patch.rb → lib/settings_controller_patch.rb

@@ -62,4 +62,4 @@ end
 
 unless SettingsController.included_modules.include? SettingsControllerPatch
   SettingsController.send(:include, SettingsControllerPatch)
-end
\ No newline at end of file
+end

lib/sparkline_hook_listener.rb

@@ -2,4 +2,4 @@ class SparklineHookListener < Redmine::Hook::ViewListener
   render_on :view_issues_index_bottom, partial: "hooks/sparkline_issues_list"
 
    render_on :view_issues_show_details_bottom, partial: "hooks/sparkline_issues_show"
-end
\ No newline at end of file
+end

lib/sparkline_projects_helper_patch.rb

+require_dependency 'projects_helper'
+
+module SparklineProjectsHelperPatch
+  module ProjectsHelperPatch
+    def project_settings_tabs
+      tabs = super
+      action = {:name => 'sparkline',
+                  :action => :sparkline,
+                  :partial => 'settings/plugin_sparkline',
+                  :label => :sparkline}
+      tabs << action if @project.enabled_module(:sparkline)
+     tabs
+    end
+  end
+end
+
+ProjectsHelper.prepend SparklineProjectsHelperPatch::ProjectsHelperPatch