Print some extra info in the deploy script.
#!/bin/bash
set -e
+# Print Travis environment variables.
+echo "TRAVIS_PULL_REQUEST: ${TRAVIS_PULL_REQUEST}."
+echo "TRAVIS_TAG: ${TRAVIS_TAG}."
+echo "TRAVIS_BRANCH: ${TRAVIS_BRANCH}."
+
# Only act if this is build was fired from a push to master.
if [ "${TRAVIS_PULL_REQUEST}" = "false" ] && [ "${TRAVIS_TAG}" = "false" ] && [ "${TRAVIS_BRANCH}" = "master" ]
then
