#
# $Id: frontend.in,v 1.44 2004/05/14 15:13:38 jmmv Exp $
# bt_logic's frontend.
#
# buildtool
# Copyright (c) 2003, 2004 Julio M. Merino Vidal.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
# 3. Neither the name of the author nor the names of contributors may
#    be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#

usage() {
    local exitstatus=${1}
    local detailed=${2}

    [ ${detailed} = yes ] && echo "@PACKAGE@ version @VERSION@" 1>&2

    echo "usage: ${ProgName} [extra opts] {-s ,--stage=}name" \
        "[target1 ... targetN]" 1>&2

    if [ ${detailed} = yes ]; then
        cat 1>&2 <<EOF

Available options:
    {-d |--destdir=}dir     Set installation destination (only during install).
    {-f |--file=}file       Set script name.
    {-h|--help}             Show this help message.
    --ignore-sw-config      Ignore system wide configuration file.
    {-l |--logfile=}file    Set log file name and enable logging.
    {-s |--stage=}name      Specifiy stage to be executed.
    {-w |--workdir=}dir     Set work directory.

See buildtool(1) for more information.
EOF
    fi

    exit ${exitstatus}
}

main() {
    local load_sw_config

    btcmn_req_runtime

    load_sw_config=yes
    scrfile=
    LogFile=
    Stage=

    BT_DESTDIR=
    BT_WORKDIR=

    while [ $# -gt 0 ]; do
        [ -z "$(echo ${1} | grep ^-)" ] && break

        case "${1}" in
            -d)
                BT_DESTDIR="${2}"; shift
                ;;
            --destdir=*)
                BT_DESTDIR=$(echo ${1} | sed -e 's|--destdir=||')
                ;;
            -f)
                if echo ${2} | grep / >/dev/null; then
                    scrfile="./${2}"
                else
                    scrfile="${2}"
                fi
                shift
                ;;
            --file=*)
                arg=$(echo ${1} | sed -e 's|--file=||')
                if echo ${arg} | grep / >/dev/null; then
                    scrfile="./${arg}"
                else
                    scrfile="${arg}"
                fi
                ;;
            --ignore-sw-config)
                load_sw_config=no
                ;;
            -h|--help)
                usage 0 yes
                ;;
            -l)
                LogFile="${2}"; shift
                ;;
            --logfile=*)
                LogFile=$(echo ${1} | sed -e 's|--logfile=||')
                ;;
            -s)
                Stage="${2}"; shift
                ;;
            --stage=*)
                Stage=$(echo ${1} | sed -e 's|--stage=||')
                ;;
            -w)
                BT_WORKDIR="${2}"; shift
                ;;
            --workdir=*)
                BT_WORKDIR=$(echo ${1} | sed -e 's|--workdir=||')
                ;;
            --)
                shift; break
                ;;
            *)
                btcmn_warn "unknown option \`${1}'"
                usage 1 no
                ;;
        esac
        shift
    done

    [ ${Stage} != install -a -n "${BT_DESTDIR}" ] && \
        btcmn_err "-d (--destdir) can only be used during the \`install' stage"

    btcmn_req_project

    [ -n "${scrfile}" ] && LogicFile="${scrfile}"
    if [ -z "${BT_WORKDIR}" ]; then
        if [ -d "${BT_TOPDIR}/work.bt" -a \
             -f "${BT_TOPDIR}/work.bt/bt_config.env" ]
        then
            BT_WORKDIR=${BT_TOPDIR}/work.bt
        else
            BT_WORKDIR=${BT_TOPDIR}
        fi
    fi

    # Load system configuration
    if [ ${load_sw_config} = yes -a -f "@DIR_CONF@/bt_logic.conf" ]; then
        echo "bt_logic: loading system-wide configuration"
        . "@DIR_CONF@/bt_logic.conf"
    fi

    if [ ! -f "${BT_WORKDIR}/bt_config.env" ]; then
        btcmn_err "the package is not configured (use \`buildtool config')" \
            "(or maybe you forgot to specify the work directory?)"
    fi
    . ${BT_WORKDIR}/bt_config.env
    [ -f ${BT_WORKDIR}/bt_logic.env ] && . ${BT_WORKDIR}/bt_logic.env

    bt_enter_obj

    bt_init

    btcmn_req_docs
    btcmn_req_logic

    [ ${BT_FEATURE_DEVELOPER} = yes -a -z "${LogFile}" ] && \
        LogFile=${BT_OBJDIR}/.bt_logic.log

    docs
    logic

    _BT_CMDTARGETS="$*"
    if [ $# -gt 0 ]; then
        BT_TARGETS=
        bt_target $*
    fi

    local res
    if ! isfunc stage_${Stage}; then
        btcmn_warn "unknown stage \`${Stage}'"
        res=1
    else
        if [ -n "${LogFile}" ]; then
            [ -f "${LogFile}" ] && echo >> ${LogFile}
            echo "---------------------------------------------------------------------------" >> ${LogFile} # NOLINT
            echo "bt_logic session started at $(date)" >> ${LogFile}
            echo >> ${LogFile}
        fi
        eval stage_${Stage} ${BT_TARGETS}
        res=$?
    fi

    return ${res}
}

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