Create common script file for workon tools. Planning on using in another CL.

cros_workon

 #!/bin/bash
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script moves ebuilds between 'stable' and 'live' states.
 # By default 'stable' ebuilds point at and build from source at the
 # last known good commit. Moving an ebuild to 'live' (via cros_workon start)
 # is intended to support development. The current source tip is fetched,
 # source modified and built using the unstable 'live' (9999) ebuild.
 
 # Load common constants.  This should be the first executable line.
 # The path to common.sh should be relative to your script's location.
 . "$(dirname "$0")/common.sh"
 
+# Load common functions for workon scripts.
+. "$(dirname "$0")/lib/cros_workon_common.sh"
+
 # Script must be run inside the chroot
 restart_in_chroot_if_needed $*
 get_default_board
 
 DEFINE_string board "${DEFAULT_BOARD}" \
   "The board to set package keywords for."
 DEFINE_boolean host "${FLAGS_FALSE}" \
   "Uses the host instead of board"
 DEFINE_string command "git status" \
   "The command to be run by forall."
@@ skipping 120 matching lines @@
 ebuild_iterate() {
   local atoms=$1
 
   for atom in ${atoms}; do
     info "Running \"${FLAGS_command}\" on ${atom}"
     eval $(${EBUILDCMD} $(${EQUERYCMD} which ${atom}) info)
     (cd "${CROS_WORKON_SRCDIR}" && bash -c "${FLAGS_command}")
   done
 }
 
-show_workon_ebuilds() {
-  pushd "${BOARD_DIR}"/etc/ 1> /dev/null
-  source make.conf
-  popd 1> /dev/null
-  local CROS_OVERLAYS="${PORTDIR_OVERLAY}"
-
-  for overlay in ${CROS_OVERLAYS}; do
-    pushd ${overlay} 1> /dev/null
-    find . -name '*.ebuild' | xargs fgrep cros-workon | \
-      awk -F / '{ print $2 "/" $3 }' | uniq | sort
-    popd 1> /dev/null
-  done
-}
-
 # --all makes commands operate on different lists
 if [ ${FLAGS_all} = "${FLAGS_TRUE}" ]; then
   case ${WORKON_CMD} in
     start) ATOM_LIST=$(show_workon_ebuilds);;
     stop|iterate) ATOM_LIST=$(show_live_ebuilds);;
     list) ;;
     *) die "--all is invalid for the given command";;
   esac
 else # not selected --all
   case ${WORKON_CMD} in
     start|stop|iterate)
       ATOM_LIST=$@
       if [ -z "${ATOM_LIST}" ]; then
         die "${WORKON_CMD}: No packages specified"
       elif ! ATOM_LIST=$(canonicalize_names "${ATOM_LIST}"); then
         die "Error parsing package list"
       fi;;
     *) ;;
   esac
 fi
 
 case ${WORKON_CMD} in
   start)  ebuild_to_live "${ATOM_LIST}" ;;
   stop)   ebuild_to_stable "${ATOM_LIST}" ;;
   list)   [ ${FLAGS_all} = "${FLAGS_FALSE}" ] && show_live_ebuilds || show_workon_ebuilds ;;
   iterate)ebuild_iterate "${ATOM_LIST}" ;;
   *)      die "invalid cros_workon command" ;;
 esac