Added a --debug flag. Maybe chaning this latter to be --verbose or --…

…trace

Change-Id: I1fd04ebd413127ab04dae35fb3ee09642477b1e2

lib/vmc/cli.rb

@@ -38,6 +38,9 @@ class CLI < Mothership
     option :force, :desc => "Skip interaction when possible", :alias => "-f",
       :type => :boolean, :default => proc { input[:script] }
 
+    option :debug, :desc => "Print full stack trace (instead of crash log)",
+           :type => :boolean, :default => false
+
     option :quiet, :desc => "Simplify output format", :alias => "-q",
       :type => :boolean, :default => proc { input[:script] }
 
@@ -137,6 +140,7 @@ def execute(cmd, argv, global = {})
       msg << ": #{e}" unless e.to_s.empty?
       msg << "\nFor more information, see #{VMC::CRASH_FILE}"
       err msg
+      raise if debug?
     end
 
     def log_error(e)
@@ -173,6 +177,10 @@ def force?
       input[:force]
     end
 
+    def debug?
+      !!input[:debug]
+    end
+
     def color_enabled?
       input[:color]
     end

spec/vmc/cli_spec.rb

@@ -4,8 +4,10 @@
   let(:cmd) { Class.new(VMC::CLI).new }
 
   describe '#execute' do
+    let(:inputs) { {} }
+
     subject do
-      stub(cmd).input { {} }
+      stub(cmd).input { inputs }
       cmd.execute(nil, [])
     end
 
@@ -15,6 +17,24 @@
       mock(cmd).err "GET /foo timed out"
       subject
     end
+
+    context "when the debug flag is on" do
+      let(:inputs) { {:debug => true} }
+
+      it 'reraises' do
+        stub(cmd).precondition { raise StandardError.new }
+        expect { subject }.to raise_error(StandardError)
+      end
+    end
+
+    context "when the debug flag is off" do
+      it 'outputs the crash log message' do
+        stub(cmd).precondition { raise StandardError.new }
+        mock(cmd).err "StandardError: StandardError\nFor more information, see /Users/pivotal/workspace/vmc/vmc/spec/tmp/.vmc/crash"
+
+        expect { subject }.not_to raise_error(StandardError)
+      end
+    end
   end
 end