cros_workon: also create unmask

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 21 matching lines @@
 FLAGS "$@" || exit 1
 eval set -- "${FLAGS_ARGV}"
 
 [ -n "${FLAGS_board}" ] || die "--board is required."
 
 # eat the workon command keywords: start, stop or list.
 WORKON_CMD=$1
 shift
 
 BOARD_DIR=/build/"${FLAGS_board}"
+
 KEYWORDS_DIR=${BOARD_DIR}/etc/portage/package.keywords
+UNMASK_DIR=${BOARD_DIR}/etc/portage/package.unmask
 KEYWORDS_FILE=${KEYWORDS_DIR}/cros-workon
+UNMASK_FILE=${UNMASK_DIR}/cros-workon
 
-sudo mkdir -p "${KEYWORDS_DIR}" || die "mkdir -p ${KEYWORDS_DIR}"
-sudo touch "${KEYWORDS_FILE}" || die "touch ${KEYWORDS_FILE}"
+sudo mkdir -p "${KEYWORDS_DIR}" "${UNMASK_DIR}" || die "mkdir -p ${KEYWORDS_DIR} ${UNMASK_DIR}"
+sudo touch "${KEYWORDS_FILE}" "${UNMASK_FILE}" || die "touch ${KEYWORDS_FILE} ${UNMASK_FILE}"
 
 # Canonicalize package name to category/package.
 canonicalize_name () {
   equery-${FLAGS_board} which $1 | \
     awk -F '/' '{ print $(NF-2) "/" $(NF-1) }'
 }
 
 # Canonicalize a list of names.
 canonicalize_names () {
   local atoms=$1
@@ skipping 17 matching lines @@
 [ -n "${ATOM_LIST}" ] || ATOM_LIST=$(show_live_ebuilds)
 
 # Move a stable ebuild to the live development catgeory.  The ebuild
 # src_unpack step fetches the package source for local development.
 ebuild_to_live () {
   local atoms=$1
 
   for atom in ${atoms}; do
     if ! grep -qx "${atom}" "${KEYWORDS_FILE}" ; then
       sudo bash -c "echo \"${atom}\" >> \"${KEYWORDS_FILE}\""
+      sudo bash -c "echo \"~${atom}-9999\" >> \"${UNMASK_FILE}\""
     fi
   done
 }
 
 # Move a live development ebuild back to stable.
 ebuild_to_stable () {
   local atoms=$1
 
   for atom in ${atoms}; do
+    # remove the keyword
     sudo bash -c "grep -v '^${atom}\$' \"${KEYWORDS_FILE}\" > \
         \"${KEYWORDS_FILE}+\""
     sudo mv "${KEYWORDS_FILE}+" "${KEYWORDS_FILE}"
+    # remove the unmask
+    sudo bash -c "grep -v '^~${atom}-9999\$' \"${UNMASK_FILE}\" > \
+        \"${UNMASK_FILE}+\""
+    sudo mv "${UNMASK_FILE}+" "${UNMASK_FILE}"
+
   done
 }
 
 # Run a command on all or a set of repos.
 ebuild_forall() {
   local atoms=$1
 
   for atom in ${atoms}; do
     info "Running \"${FLAGS_command}\" on ${atom}"
     eval $(ebuild-${FLAGS_board} $(equery-${FLAGS_board} which ${atom}) info)
     (cd "${CROS_WORKON_SRCDIR}" && bash -c "${FLAGS_command}")
   done
 }
 
 case ${WORKON_CMD} in
   start)  ebuild_to_live "${ATOM_LIST}" ;;
   stop)   ebuild_to_stable "${ATOM_LIST}" ;;
   list)   show_live_ebuilds ;;
   forall) ebuild_forall "${ATOM_LIST}" ;;
   *)      die "invalid cros_workon command" ;;
 esac