Merge pull request #577 from eatdrinksleepcode/verify-no-changes

Check that there are no source file changes before building

.travis.yml

@@ -11,4 +11,6 @@ cache:
   directories:
     - "node_modules"
 script:
+  - ./checkgit.sh "Source files were modified before build; is yarn.lock out of sync with package.json?" || travis_terminate $?
   - yarn grunt
+  - ./checkgit.sh "Source files were modified by the build" || travis_terminate $?

checkgit.sh

@@ -0,0 +1,6 @@
+GIT_STATUS=$(git status --porcelain | wc -l )
+if [[ GIT_STATUS -ne 0 ]]; then
+  echo "${1:-Source files were modified}"
+  git status
+  exit $GIT_STATUS
+fi;