Support timestamp based package names for nightlies

Change-Id: Ibad230f6d82aad146d011a25dfc529f6c6f3b5c4

package.sh

@@ -14,7 +14,10 @@
 
 # This script generates RPM and debian packages.
 #
-# Usage: ./package.sh [VERSION_TAG]
+# Usage: ./package.sh [-t] [VERSION_TAG]
+#
+#
+#   -t: use timestamp based package name for unstable packges.
 #
 #   VERSION_TAG: Tag to determine version and revision string for
 #                deb and RPM packages.
@@ -24,6 +27,15 @@
 
 set -e
 
+while getopts t OPT; do
+    case "$OPT" in
+      t)
+          USE_TIMESTAMP=yes
+          shift
+          ;;
+    esac
+done
+
 # Get version tag from command line or defaults to use git describe
 version_tag=$1
 if [ "$version_tag" == "" ]; then
@@ -61,7 +73,12 @@ elif [[ "$version_tag" =~ ^([0-9]{4}\.[0-9]+)\+([0-9]+\.[0-9])\.(rc[0-9]+.*)$ ]]
     echo Producing unstable packages for tag: $version_tag
     upstream_version=${BASH_REMATCH[1]}
     downstream_version=${BASH_REMATCH[2]}
-    pre_release_tag=$(echo ${BASH_REMATCH[3]} | sed -e 's/-/./g')
+
+    if [ "$USE_TIMESTAMP" == "yes" ]; then
+        pre_release_tag=$(date '+%Y%m%d%H%M')
+    else
+        pre_release_tag=$(echo ${BASH_REMATCH[3]} | sed -e 's/-/./g')
+    fi
 
     rpm_version=$upstream_version+$downstream_version
     rpm_revision="0."$pre_release_tag