Mirror image - added subdirectory for aptly-add packages.sh

Change-Id: Ife6de39a2e220729d0f1567ed7f3d459817187be
diff --git a/mirror-image/aptly-add-packages.sh b/mirror-image/aptly-add-packages.sh
index ea93aa0..4ba9b94 100755
--- a/mirror-image/aptly-add-packages.sh
+++ b/mirror-image/aptly-add-packages.sh
@@ -1,14 +1,16 @@
 #!/bin/bash
-DIR="$PWD"
+WORKING_DIR="$PWD"
 while getopts "d:"  option
 do
  case "${option}"
   in
-  d|\?) DIR="${OPTARG}";;
+  d|\?) WORKING_DIR="${OPTARG}";;
   esac
 done
 
-mkdir $DIR
+TIME=$(date +%Y%m%d-%H%M%S)
+DIR="$WORKING_DIR/aptly-packages-import-$TIME"
+mkdir -p $DIR
 
 PAYLOAD_LINE=`awk '/^__PAYLOAD_BELOW__/ {print NR + 1; exit 0; }' $0`
 
@@ -19,7 +21,7 @@
 for REPO in $REPOS
 do
     aptly repo add $REPO $DIR/$REPO
-    SNAPSHOT_NAME="$REPO-$(date +%Y%m%d-%H%M%S)"
+    SNAPSHOT_NAME="$REPO-$TIME"
     aptly snapshot create $SNAPSHOT_NAME from repo $REPO
 done