scripts/release.sh: check that git repo is clean and that exactly two…

… changes were made when bumping version number before proceeding

scripts/release.sh

@@ -1,7 +1,6 @@
 #!/bin/bash
 set -e
 
-
 cd "$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )" # scripts/
 cd ../ # store.js project root
 
@@ -17,6 +16,11 @@ if [ "$GIT_BRANCH" != "master" ]; then
 	exit -1
 fi
 
+if [[ $(git status 2> /dev/null | tail -n1) != "nothing to commit (working directory clean)" ]]; then
+	echo "git repo is dirty. Commit all changes before using release.sh"
+	exit -1
+fi
+
 echo
 echo "> Bump package.json version:"
 echo
@@ -33,6 +37,11 @@ sed -E s/"version\: '[0-9]+\.[0-9]+\.[0-9]+'"/"version\: '$VERSION'"/ src/store-
 	mv /tmp/store-engine.js src/store-engine.js
 cat src/store-engine.js | grep $VERSION -C 1
 
+if [[ ! `git diff --stat` =~ "2 files changed, 2 insertions, 2 deletions" ]]; then
+	echo "WARNING! Expected exactly 2 changes in 2 files after replacing version number. Bailing! (check git status and git diff)"
+	exit -1
+fi
+
 echo
 while true; do
     read -p "> Ready to build, commit, tag and release v$VERSION? (y/n): " yn