change travis builds to publish docker images with tag 'nightly' (#71)

Author: dgrove-oss

.travis.yml

@@ -46,7 +46,7 @@ deploy:
       condition: "${TRAVIS_TAG%@*} = dockerskeleton || ${TRAVIS_TAG%@*} = example"
       repo: apache/incubator-openwhisk-runtime-docker
   - provider: script
-    script: "./tools/travis/publish.sh openwhisk dockerskeleton latest && ./tools/travis/publish.sh openwhisk example latest"
+    script: "./tools/travis/publish.sh openwhisk dockerskeleton nightly && ./tools/travis/publish.sh openwhisk example nightly"
     on:
       branch: master
       repo: apache/incubator-openwhisk-runtime-docker

tools/travis/publish.sh

@@ -48,8 +48,8 @@ if [[ ! -z ${GRADLE_BUILD} ]] && [[ ! -z ${IMAGE_PREFIX} ]] && [[ ! -z ${IMAGE_T
   -PdockerImagePrefix=${IMAGE_PREFIX} \
   -PdockerImageTag=${IMAGE_TAG}
 
-    # if doing latest also push a tag with the hash commit
-  if [ ${IMAGE_TAG} == "latest" ]; then
+    # if doing nightly also push a tag with the hash commit
+  if [ ${IMAGE_TAG} == "nightly" ]; then
     SHORT_COMMIT=`git rev-parse --short HEAD`
     TERM=dumb ./gradlew \
     ${GRADLE_BUILD} \