Address comments.

build-package.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# exit on any error
+set -e
+
 . ./pre-check.sh
 
 tsc

push-package.sh

@@ -1,12 +1,21 @@
 #!/bin/bash
-if [[ "${1}x" == "x" ]]; then
-  echo "Usage: ${0} <version>"
-  exit 1
-fi
+
+# exit on any error
+set -e 
+
+version=$(cat package.json | jq -r .version)
 
 . ./pre-check.sh
 
+echo "This will tag and publish package version ${version}"
+read -p "Confirm [y/N]" confirm
+
+case "${confirm}" in
+  y|Y ) echo "Tagging and pushing ${version}";;
+  * ) echo "Aborting"; exit 0;;
+esac
+
 git tag ${1}
-git push upstream ${tag}
+git push upstream ${1}
 
 npm publish