Add preflight check for Toolbelt (CLI)

Author: kmayer

.gitignore

@@ -5,3 +5,4 @@ Thumbs.db
 tmp
 .idea/**
 *.swp
+.rspec

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    heroku_san (4.0.1)
+    heroku_san (4.0.2)
       activesupport
       heroku-api (>= 0.1.2)
       rake
@@ -60,8 +60,8 @@ GEM
     git-smart (0.1.9)
       colorize
     godot (0.1.0)
-    heroku-api (0.3.5)
-      excon (~> 0.16.1)
+    heroku-api (0.3.6)
+      excon (~> 0.16.7)
     hike (1.2.1)
     i18n (0.6.0)
     journey (1.0.3)

Rakefile

@@ -10,5 +10,4 @@ task :default => :spec
 desc "Run all specs"
 RSpec::Core::RakeTask.new do |t|
   t.pattern = 'spec/**/*_spec.rb'
-  t.rspec_opts = ["-c", "-f progress"]
 end

lib/heroku_san/stage.rb

@@ -139,12 +139,17 @@ def auth_token
     end
 
     def sh_heroku(*command)
+      preflight_check_for_cli
       cmd = (command + ['--app', app]).compact
       show_command = cmd.join(' ')
       $stderr.puts show_command if @debug
       ok = system "heroku", *cmd
       status = $?
       ok or fail "Command failed with status (#{status.exitstatus}): [heroku #{show_command}]"
     end
+
+    def preflight_check_for_cli
+      raise "The Heroku Toolbelt is required for this action. http://toolbelt.heroku.com" if system('heroku version') == nil
+    end
   end
 end

spec/heroku_san/stage_spec.rb

@@ -4,6 +4,9 @@
   include Git
   subject { HerokuSan::Stage.new('production', {"app" => "awesomeapp", "stack" => "cedar"})}
   STOCK_CONFIG = {"BUNDLE_WITHOUT"=>"development:test", "LANG"=>"en_US.UTF-8", "RACK_ENV"=>"production"}
+  before do
+    HerokuSan::Stage.any_instance.stub(:preflight_check_for_cli)
+  end
 
   context "initializes" do
     subject { HerokuSan::Stage.new('production',