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#!/bin/bash
# Copyright (c) 2005 Gentoo Foundation.
# $Header$
# This file is part of the 'eselect' tools framework.
#
# eselect is free software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# eselect is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# eselect; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place, Suite 330, Boston, MA 02111-1307 USA
# die [-q] "Message" PUBLIC
# Display "Message" as an error. If -q is not provided, gives a stacktrace.
die() {
local item funcname="" sourcefile="" lineno="" n e s="yes"
# do we have a working write_error_msg?
if is_function "write_error_msg" ; then
e="write_error_msg"
else
e="echo"
fi
# quiet?
if [[ ${1} == "-q" ]] ; then
s=""
shift
fi
$e "${@:-(no message)}"
if [[ -n "${s}" ]] ; then
echo "Call stack:" 1>&2
for (( n = 1 ; n < ${#FUNCNAME[@]} ; ++n )) ; do
funcname=${FUNCNAME[${n}]}
sourcefile=$(basename ${BASH_SOURCE[$(( n - 1 ))]})
lineno=${BASH_LINENO[$(( n - 1 ))]}
echo " * ${funcname} (${sourcefile}:${lineno})" 1>&2
done
fi
# Evil, but effective.
kill ${ESELECT_KILL_TARGET}
exit 249
}
# is_function function PUBLIC
# Test whether function exists
is_function() {
[[ $(type -t "${1}" ) == "function" ]]
}
# check_do function args
# Check that function exists, and call it with args.
check_do() {
local function="${1}"
shift
if is_function "${function}" ; then
${function} "$@"
else
die "No function ${function}"
fi
}
# do_action action args...
# Load and do 'action' with the specified args
do_action() {
local action="${1##--}" modfile="" subaction="${2##--}"
[[ -z ${action} ]] && die "Usage: do_action <action> <args>"
shift 2
ESELECT_MODULE_NAME="${action}"
ESELECT_COMMAND="${ESELECT_PROGRAM_NAME} ${ESELECT_MODULE_NAME}"
[[ ${ESELECT_BINARY_NAME##*/} != ${ESELECT_PROGRAM_NAME} ]] && \
ESELECT_COMMAND="${ESELECT_BINARY_NAME##*/}"
modfile=$( ec_find_module "${action}" )
(
source "$ESELECT_DEFAULT_ACTIONS" 2>/dev/null \
|| die "Couldn't source ${ESELECT_DEFAULT_ACTIONS}"
source "${modfile}" 2>/dev/null \
|| die "Couldn't source ${modfile}"
if [[ -z ${subaction} ]] ; then
check_do "do_${DEFAULT_ACTION:-usage}" "$@"
else
is_function "do_${subaction}" \
|| die -q "Action ${subaction} unknown"
check_do "do_${subaction}" "$@"
fi
)
}
# has varname item
has() {
local var=${1} item
for item in ${var} ; do
[[ ${item} == ${2} ]] && return 0
done
return 1
}
# make eval not work, because it's evil
eval() {
die "Don't use eval. Find another way."
}
# vim: set sw=4 et sts=4 tw=80 :
|
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