Get documentation version before building.

Author: daspecster

scripts/update_json_docs.sh

@@ -45,18 +45,22 @@ function cleanSubmodule () {
 }
 
 # Run this to verifiy that the docs build successfully.
-buildDocs $TRAVIS_BRANCH
+if [[ ! -z ${TRAVIS_TAG} ]]; then
+  DOC_VERSION = ${TRAVIS_TAG}
+else
+  DOC_VERSION = ${TRAVIS_BRANCH}
+fi
+
+buildDocs ${DOC_VERSION}
 
 if [ "${TRAVIS_BRANCH}" == "master" ] && [ "${TRAVIS_PULL_REQUEST}" == "false" ]; then
-    buildDocs $TRAVIS_BRANCH
-  pushDocs $TRAVIS_BRANCH
+  pushDocs ${DOC_VERSION}
   cleanSubmodule
   echo "Done pushing docsite. See: https://googlecloudplatform.github.io/gcloud-python/"
 fi
 
-if [[ ! -z $TRAVIS_TAG ]]; then
-  buildDocs $TRAVIS_TAG
-  pushDocs $TRAVIS_TAG
+if [[ ! -z ${TRAVIS_TAG} ]]; then
+  pushDocs ${DOC_VERSION}
   cleanSubmodule
   echo "Done pushing docsite. See: https://googlecloudplatform.github.io/gcloud-python/"
 fi