scripts/libmakepkg/util/option.sh


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#!/bin/bash
#
#   option.sh - functions to test if build/packaging options are enabled
#
#   Copyright (c) 2009-2015 Pacman Development Team <pacman-dev@archlinux.org>
#
#   This program 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.
#
#   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
#

[ -n "$LIBMAKEPKG_UTIL_OPTION_SH" ] && return
LIBMAKEPKG_UTIL_OPTION_SH=1


##
#  usage : in_opt_array( $needle, $haystack )
# return : 0   - enabled
#          1   - disabled
#          127 - not found
##
in_opt_array() {
        local needle=$1; shift

        local i opt
        for (( i = $#; i > 0; i-- )); do
                opt=${!i}
                if [[ $opt = "$needle" ]]; then
                        # enabled
                        return 0
                elif [[ $opt = "!$needle" ]]; then
                        # disabled
                        return 1
                fi
        done

        # not found
        return 127
}


##
# Checks to see if options are present in makepkg.conf or PKGBUILD;
# PKGBUILD options always take precedence.
#
#  usage : check_option( $option, $expected_val )
# return : 0   - matches expected
#          1   - does not match expected
#          127 - not found
##
check_option() {
        in_opt_array "$1" ${options[@]}
        case $? in
                0) # assert enabled
                        [[ $2 = y ]]
                        return ;;
                1) # assert disabled
                        [[ $2 = n ]]
                        return
        esac

        # fall back to makepkg.conf options
        in_opt_array "$1" ${OPTIONS[@]}
        case $? in
                0) # assert enabled
                        [[ $2 = y ]]
                        return ;;
                1) # assert disabled
                        [[ $2 = n ]]
                        return
        esac

        # not found
        return 127
}


##
# Check if option is present in BUILDENV
#
#  usage : check_buildenv( $option, $expected_val )
# return : 0   - matches expected
#          1   - does not match expected
#          127 - not found
##
check_buildenv() {
        in_opt_array "$1" ${BUILDENV[@]}
        case $? in
                0) # assert enabled
                        [[ $2 = "y" ]]
                        return ;;
                1) # assert disabled
                        [[ $2 = "n" ]]
                        return ;;
        esac

        # not found
        return 127
}