FEATURE: plugins can register a custom admin quick start topic that will be seeded into new sites

db/fixtures/999_topics.rb

@@ -54,6 +54,15 @@ if seed_welcome_topics
     post.topic.update_pinned(true)
   end
 
-  welcome = File.read(Rails.root + 'docs/ADMIN-QUICK-START-GUIDE.md')
-  PostCreator.create(Discourse.system_user, raw: welcome, title: "READ ME FIRST: Admin Quick Start Guide", skip_validations: true, category: staff ? staff.name : nil)
+  filename = DiscoursePluginRegistry.seed_data["admin_quick_start_filename"]
+  if filename.nil? || !File.exists?(filename)
+    filename = Rails.root + 'docs/ADMIN-QUICK-START-GUIDE.md'
+  end
+
+  welcome = File.read(filename)
+  PostCreator.create( Discourse.system_user,
+                      raw: welcome,
+                      title: DiscoursePluginRegistry.seed_data["admin_quick_start_title"] || "READ ME FIRST: Admin Quick Start Guide",
+                      skip_validations: true,
+                      category: staff ? staff.name : nil)
 end

lib/discourse_plugin_registry.rb

@@ -13,6 +13,7 @@ class DiscoursePluginRegistry
     attr_writer :sass_variables
     attr_writer :handlebars
     attr_writer :serialized_current_user_fields
+    attr_writer :seed_data
 
     attr_accessor :custom_html
 
@@ -56,6 +57,10 @@ class DiscoursePluginRegistry
     def serialized_current_user_fields
       @serialized_current_user_fields ||= Set.new
     end
+
+    def seed_data
+      @seed_data ||= HashWithIndifferentAccess.new({})
+    end
   end
 
   def register_js(filename, options={})
@@ -104,6 +109,10 @@ class DiscoursePluginRegistry
     end
   end
 
+  def self.register_seed_data(key, value)
+    self.seed_data[key] = value
+  end
+
   def javascripts
     self.class.javascripts
   end

lib/plugin/instance.rb

@@ -17,6 +17,10 @@ class Plugin::Instance
     }
   end
 
+  def seed_data
+    @seed_data ||= {}
+  end
+
   def self.find_all(parent_path)
     [].tap { |plugins|
       # also follows symlinks - http://stackoverflow.com/q/357754
@@ -168,6 +172,10 @@ class Plugin::Instance
     color_schemes << {name: name, colors: colors}
   end
 
+  def register_seed_data(key, value)
+    seed_data[key] = value
+  end
+
   def automatic_assets
     css = styles.join("\n")
     js = javascripts.join("\n")
@@ -224,6 +232,10 @@ class Plugin::Instance
 
     register_assets! unless assets.blank?
 
+    seed_data.each do |key, value|
+      DiscoursePluginRegistry.register_seed_data(key, value)
+    end
+
     # TODO: possibly amend this to a rails engine
 
     # Automatically include assets

spec/components/discourse_plugin_registry_spec.rb

@@ -43,6 +43,14 @@ describe DiscoursePluginRegistry do
     end
   end
 
+  context '#seed_data' do
+    it 'defaults to an empty Set' do
+      registry.seed_data = nil
+      expect(registry.seed_data).to be_a(Hash)
+      expect(registry.seed_data.size).to eq(0)
+    end
+  end
+
   context '.register_css' do
     before do
       registry_instance.register_css('hello.css')
@@ -143,4 +151,20 @@ describe DiscoursePluginRegistry do
     end
   end
 
+  context '#register_seed_data' do
+    let(:registry) { DiscoursePluginRegistry }
+
+    after do
+      registry.reset!
+    end
+
+    it "registers seed data properly" do
+      registry.register_seed_data("admin_quick_start_title", "Banana Hosting: Quick Start Guide")
+      registry.register_seed_data("admin_quick_start_filename", File.expand_path("../docs/BANANA-QUICK-START.md", __FILE__))
+
+      expect(registry.seed_data["admin_quick_start_title"]).to eq("Banana Hosting: Quick Start Guide")
+      expect(registry.seed_data["admin_quick_start_filename"]).to eq(File.expand_path("../docs/BANANA-QUICK-START.md", __FILE__))
+    end
+  end
+
 end