vicell command for editing/applying cell configurations

Change-Id: I3e9731342ef015649978941ba984af4fc0af41d2

@@ -116,3 +116,41 @@ function spy {
 function nuke {
     spy "$@" | cut -c7-11 | xargs kill
 }
+
+# Edit a cell file by providing a cell name. Opens the cell file in $EDITOR.
+function vicell() {
+  local apply=false
+  local create=false
+  local cdf=""
+  local cpath="${ONOS_ROOT}/tools/test/cells/"
+
+  if [ -z "$1" ] || [ "$1" = "-h" ] ; then
+    printf "usage: vicell [file] [options]\n\noptions:\n"
+    printf "\t-a: apply the cell after editing\n"
+    printf "\t-e: [editor] set EDITOR to [editor] (default *vi*)\n"
+    printf "\t-c: create cell file if none exist\n\n"
+    return 1
+  fi
+
+  while [ $# -gt 0 ]; do
+    case "$1" in
+      -a) apply=true ;;
+      -e) EDITOR=$2; shift ;;
+      -c) create=true ;;
+      *) cdf="$1" ;;
+    esac
+    shift
+  done
+
+  if [ ! -e "${cpath}${cdf}" ] && [ "$create" = "false" ]; then
+       printf "${cdf} : no such cell\n" && return 1
+  fi
+
+  if [ -z "$EDITOR" ]; then
+    vi ${cpath}${cdf}
+  else
+    $EDITOR ${cpath}${cdf}
+  fi
+  ($apply) && cell ${cdf}
+
+}