cros_workon: allow a stop on a dead package

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,
@@ skipping 85 matching lines @@
   [ -f "${UNMASK_FILE}" ] && sudo mv "${UNMASK_FILE}" "${WORKON_FILE}"
   sudo ln -s "${WORKON_FILE}" "${UNMASK_FILE}" || \
     die "ln -s ${WORKON_FILE} ${UNMASK_FILE}"
 fi
 
 # Canonicalize package name to category/package.
 canonicalize_name () {
   local pkgfile
   local pkgname
 
+  if grep -qx "=$1-9999" "${WORKON_FILE}" ; then
+    echo $1
+    return 0
+  fi
+
   if ! pkgfile=$(ACCEPT_KEYWORDS="~${BOARD_KEYWORD}" ${EQUERYCMD} which $1); then
     warn "error looking up package $1" 1>&2
     return 1
   fi
 
   pkgname=$(\
     echo "${pkgfile}" |awk -F '/' '{ print $(NF-2) "/" $(NF-1) }')
 
   if ! grep -q "cros-workon" ${pkgfile}; then
     warn "${pkgname} is not a cros-workon package" 1>&2
@@ skipping 123 matching lines @@
 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 ${BOARD_KEYWORD} ;;
   list-all) show_all_live_ebuilds ;;
   iterate)ebuild_iterate "${ATOM_LIST}" ;;
   *)      die "$(basename $0): command '${WORKON_CMD}' not recognized" ;;
 esac