cros_workon: introduce a very simple listall command

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 11 matching lines @@
   "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."
 
 FLAGS_HELP="usage: $0 <command> [flags]
 commands:
   start:  Moves an ebuild to live (intended to support development)
   stop:  Moves an ebuild to stable (use last known good)
-  list:  List of all live ebuilds
+  list:  List of current live ebuilds
+  listall: List all possible cros-workon ebuilds
   forall:  For each ebuild, cd to the source dir and run a commond"
 FLAGS "$@" || exit 1
 eval set -- "${FLAGS_ARGV}"
 
+
+# eat the workon command keywords: start, stop or list.
+WORKON_CMD=$1
+shift
+
+
 # board dir config
 [ -n "${FLAGS_board}" ] && [ "${FLAGS_host}" = ${FLAGS_TRUE} ] && \
   die "Flags --host and --board are mutually exclusive."
 [ -z "${FLAGS_board}" ] && [ "${FLAGS_host}" = ${FLAGS_FALSE} ] && \
   die "You must specify either --host or --board="
 
 if [ -n "${FLAGS_board}" ]; then
   BOARD_DIR=/build/"${FLAGS_board}" # --board specified
   EQUERY=equery-"${FLAGS_board}"
 else
   BOARD_DIR="" # --host specified
   EQUERY=equery
 fi
 
-
-# eat the workon command keywords: start, stop or list.
-WORKON_CMD=$1
-shift
-
-
 KEYWORDS_DIR=${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 "${KEYWORDS_DIR}" "${UNMASK_DIR}" || \
   die "mkdir -p ${KEYWORDS_DIR} ${UNMASK_DIR}"
 sudo touch "${KEYWORDS_FILE}" "${UNMASK_FILE}" || \
   die "touch ${KEYWORDS_FILE} ${UNMASK_FILE}"
 
@@ skipping 85 matching lines @@
 ebuild_forall() {
   local atoms=$1
 
   for atom in ${atoms}; do
     info "Running \"${FLAGS_command}\" on ${atom}"
     eval $(ebuild-${FLAGS_board} $(${EQUERY} 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
+}
+
 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}" ;;
+  listall)show_workon_ebuilds ;;
   *)      die "invalid cros_workon command" ;;
 esac