turn into a gem

Gemfile

@@ -0,0 +1,4 @@
+source "http://rubygems.org"
+
+# Specify your gem's dependencies in heroku-sendgrid-test-email.gemspec
+gemspec

Rakefile

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+require 'bundler'
+Bundler::GemHelper.install_tasks

heroku-sendgrid-test-email.gemspec

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+# -*- encoding: utf-8 -*-
+$:.push File.expand_path("../lib", __FILE__)
+require "heroku-sendgrid-test-email/version"
+
+Gem::Specification.new do |s|
+  s.name        = "heroku-sendgrid-test-email"
+  s.version     = Heroku::Command::Sendgrid::TestEmail::VERSION
+  s.authors     = ["Terence Lee"]
+  s.email       = ["hone02@gmail.com"]
+  s.homepage    = ""
+  s.summary     = %q{Heroku plugin to test sendgrid addon}
+  s.description = %q{Heroku plugin to test sendgrid addon}
+
+  s.rubyforge_project = "heroku-sendgrid-test-email"
+
+  s.files         = `git ls-files`.split("\n")
+  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
+  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
+  s.require_paths = ["lib"]
+
+  s.add_dependency "heroku", "~> 2.0.0"
+  s.add_development_dependency "rake"
+end

init.rb

@@ -1,21 +1 @@
-class Heroku::Command::Sendgrid < Heroku::Command::Base
-  def test_email
-    app  = extract_app
-    vars = heroku.config_vars(app)
-    to = ''
-    args.each do |arg|
-      key, value = arg.split("=")
-      to = value if key == "to"
-    end
-
-    if to.empty?
-      error "please specify an address to send to using to=<me@example.com>"
-    else
-      resource = RestClient::Resource.new("https://pony-mail-test.heroku.com")
-      display resource["/mail"].post(:sendgrid_username => vars["SENDGRID_USERNAME"],
-                                     :sendgrid_password => vars["SENDGRID_PASSWORD"],
-                                     :sendgrid_domain   => vars["SENDGRID_DOMAIN"],
-                                     :to                => to)
-    end
-  end
-end
+require 'heroku-sendgrid-test-email'

lib/heroku-sendgrid-test-email.rb

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+require 'heroku-sendgrid-test-email/command/sendgrid'

lib/heroku-sendgrid-test-email/command/sendgrid.rb

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+require 'heroku/command/base'
+
+class Heroku::Command::Sendgrid < Heroku::Command::Base
+  def test_email
+    app  = extract_app
+    vars = heroku.config_vars(app)
+    to = ''
+    args.each do |arg|
+      key, value = arg.split("=")
+      to = value if key == "to"
+    end
+
+    if to.empty?
+      error "please specify an address to send to using to=<me@example.com>"
+    else
+      resource = RestClient::Resource.new("https://pony-mail-test.heroku.com")
+      display resource["/mail"].post(:sendgrid_username => vars["SENDGRID_USERNAME"],
+                                     :sendgrid_password => vars["SENDGRID_PASSWORD"],
+                                     :sendgrid_domain   => vars["SENDGRID_DOMAIN"],
+                                     :to                => to)
+    end
+  end
+end

lib/heroku-sendgrid-test-email/version.rb

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+module Heroku
+  module Command
+    module Sendgrid
+      module TestEmail
+        VERSION = "0.0.1"
+      end
+    end
+  end
+end