epm-provides

#!/bin/sh
#
# Copyright (C) 2013  Etersoft
# Copyright (C) 2013  Vitaly Lipatov <lav@etersoft.ru>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

load_helper epm-query
load_helper epm-print

epm_provides_files()
{
    local pkg_files="$*"
    [ -n "$pkg_files" ] || return

    local PKGTYPE="$(get_package_type $pkg_files)"

    case $PKGTYPE in
        rpm)
            assure_exists rpm
            docmd rpm -q --provides -p $pkg_files
            ;;
        deb)
            assure_exists dpkg
            # FIXME: will we provide ourself?
            docmd dpkg -I $pkg_files | grep "^ *Provides:" | sed "s|^ *Provides:||g"
            ;;
        *)
            fatal "Have no suitable command for $PMTYPE"
            ;;
    esac
}


epm_provides_names()
{
    local pkg_names="$*"
    local CMD
    [ -n "$pkg_names" ] || return

# by package name
case $PMTYPE in
    apt-rpm)
        # FIXME: need fix for a few names case
        # TODO: separate this function to two section
        if is_installed $pkg_names ; then
            CMD="rpm -q --provides"
        else
            EXTRA_SHOWDOCMD=' | grep "Provides:"'
            docmd apt-cache show $pkg_names | grep "Provides:"
            return
        fi
        ;;
    urpm-rpm|zypper-rpm|yum-rpm|dnf-rpm)
        if is_installed $pkg_names ; then
            CMD="rpm -q --provides"
        else
            fatal "FIXME: use hi level commands"
        fi
        ;;
    emerge)
        assure_exists equery
        CMD="equery files"
        ;;
#    yum-rpm)
#        CMD="yum deplist"
#        ;;
    pkgng)
        CMD="pkg info -b"
        ;;
    apt-dpkg)
        # FIXME: need fix for a few names case
        if is_installed $pkg_names ; then
            showcmd dpkg -s $pkg_names
            a='' dpkg -s $pkg_names | grep "^Provides:" | sed "s|^Provides:||g"
            return
        else
            EXTRA_SHOWDOCMD=' | grep "Provides:"'
            docmd apt-cache show $pkg_names | grep "Provides:" | sed -e 's|, |\n|g' | grep -v "^Provides:"
            return
        fi
        ;;
    *)
        fatal "Have no suitable command for $PMTYPE"
        ;;
esac

docmd $CMD $pkg_names

}

epm_provides()
{
    [ -n "$pkg_filenames" ] || fatal "Provides: package name is missed"

    epm_provides_files $pkg_files
    # shellcheck disable=SC2046
    epm_provides_names $(print_name $pkg_names)
}