WIP - Trigger custom rake tasks at end of deploy process

hatchet.json

@@ -28,6 +28,7 @@
     "sharpstone/bad_ruby_version"
   ],
   "rack": [
+    "sharpstone/finish_deploy",
     "sharpstone/default_ruby",
     "sharpstone/mri_187_nokogiri",
     "sharpstone/mri_192",
@@ -55,6 +56,9 @@
   "rails41": [
     "sharpstone/rails41_scaffold"
   ],
+  "rails42": [
+    "sharpstone/rails42_finish_deploy"
+  ],
   "multibuildpack": [
     "sharpstone/node_multi"
   ]

lib/language_pack/ruby.rb

@@ -97,12 +97,23 @@ def compile
         install_binaries
         run_assets_precompile_rake_task
       end
+      finish_deploy
       super
     end
   end
 
 private
 
+  def finish_deploy
+    task = rake.task("finish:deploy")
+    if task.is_defined?
+      task.invoke(env: rake_env)
+      raise BuildpackError, "Expected `rake finish:deploy` to return non-zero exit code" unless task.success?
+    else
+      topic("Skipping finish:deploy rake task, not found")
+    end
+  end
+
   # the base PATH environment variable to be used
   # @return [String] the resulting PATH
   def default_path

spec/rack_spec.rb

@@ -12,4 +12,10 @@
       expect(app.run("env")).to match(custom_env)
     end
   end
+
+  it "should trigger custom rake tasks" do
+    Hatchet::Runner.new("finish_deploy").deploy do |app|
+      expect(app.output).to include("Hello from a custom rake task")
+    end
+  end
 end

spec/rails_42_spec.rb

@@ -0,0 +1,9 @@
+require_relative 'spec_helper'
+
+describe "Rails 4.2.x" do
+  it "call the `finish:deploy` rake task if defined" do
+    Hatchet::Runner.new("rails42_finish_deploy").deploy do |app, heroku|
+      expect(app.output).to include("Hello from a custom rake task")
+    end
+  end
+end