travis: notify if no casks modified

ci/travis/helpers.sh

@@ -18,13 +18,17 @@ NC='\033[0m' # no color
 
 # log command before running and add a blank line
 run () {
-  echo -e "${MAGENTA}>>>${NC} $*"
+  ohai "$*"
   eval "$*"
   local retval=$?
   echo
   return $retval
 }
 
+ohai () {
+  echo -e "${MAGENTA}>>>${NC} $*"
+}
+
 # print args as a cyan header
 header () {
   echo

ci/travis/script.sh

@@ -14,4 +14,6 @@ if any_casks_modified; then
   modified_casks=($(modified_cask_files))
   run brew cask _audit_modified_casks "${TRAVIS_COMMIT_RANGE}"
   run brew cask style "${modified_casks[@]}"
+else
+  ohai 'No casks modified, skipping'
 fi