Add expeditor

Expeditor is the next-generation utility that we'll use for version
bumping. It will include additional features that we don't currently
have like the ability to not bump a version on a specific PR.

Signed-off-by: Tom Duffield <tom@chef.io>

.expeditor/bundle_install.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+set -evx
+
+gem environment
+bundler_version=$(grep bundler omnibus_overrides.rb | cut -d'"' -f2)
+gem install bundler -v $bundler_version --user-install --conservative
+export BUNDLE_WITHOUT=omnibus_package:test:aix:bsd:linux:mac_os_x:solaris:windows:default
+bundle _${bundler_version}_ install --no-deployment

.expeditor/config.yml

@@ -0,0 +1,14 @@
+product_key: chefdk
+
+slack:
+  notify_channel: chef-notify
+
+docker:
+  enable: true
+  build_args:
+    CHANNEL: "{{channel}}"
+    VERSION: "{{version}}"
+
+github:
+  bump_version_on_merge: true
+  trigger_build_on_bump: true

.expeditor/update_version.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -evx
+
+export LANG=en_US.UTF-8
+
+. ci/bundle_install.sh
+
+bundle exec rake expeditor_update_version
+
+git checkout .bundle/config

tasks/version.rb

@@ -38,6 +38,29 @@
   end
 end
 
+task :expeditor_update_version do
+  begin
+    require "rake"
+
+    Rake::Task["version:update_gemfile_lock"].invoke
+
+    begin
+      Rake::Task["changelog:update"].invoke
+    rescue Exception => e
+      puts "There was an error updating the CHANGELOG"
+      puts e
+    end
+
+    begin
+      Rake::Task["update_dockerfile"].invoke
+    rescue Exception => e
+      puts "There was an error updating the Dockerfile"
+      puts e
+    end
+  end
+end
+
+
 namespace :version do
   desc "Bump patch version in lib/chef-dk/version.rb and update Gemfile*.lock conservatively to include the new version. If Gemfile has changed, this will update modified constraints as well."
   task :bump => "ci_version_bump"