NBash

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#!/bin/sh
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#
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# Copyright (C) 2020, 2021  Etersoft
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# Copyright (C) 2020, 2021  Vitaly Lipatov <lav@etersoft.ru>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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load_helper epm-sh-altlinux
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# under root only
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SAVELISTDIR=$epm_vardir/eepm-etc-save
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__save_alt_repo_lists()
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{
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    assure_root
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    info "Creating copy of all sources lists to $SAVELISTDIR ..."
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    local i
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    rm -rf $verbose $SAVELISTDIR 2>/dev/null
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    mkdir -p $SAVELISTDIR/apt/ $SAVELISTDIR/apt/sources.list.d/
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    for i in /etc/apt/sources.list /etc/apt/sources.list.d/*.list ; do
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        [ -s "$i" ] || continue
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        local DD="$(echo "$i" | sed -e "s|/etc|$SAVELISTDIR|")"
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        cp -af $verbose "$i" "$DD" || fatal "Can't save apt source list files to $SAVELISTDIR"
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    done
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}
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# under root only
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__restore_alt_repo_lists()
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{
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    assure_root
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    info "Restoring copy of all sources lists from $SAVELISTDIR ..."
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    local i
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    [ -d "$SAVELISTDIR/apt" ] || return 0
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    mkdir -p $SAVELISTDIR/apt/ $SAVELISTDIR/apt/sources.list.d/
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    for i in /etc/apt/sources.list /etc/apt/sources.list.d/*.list ; do
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        [ -s "$i" ] || continue
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        local DD="$(echo "$i" | sed -e "s|/etc|$SAVELISTDIR|")"
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        # restore only if there are differences
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        if diff -q "$DD" "$i" >/dev/null ; then
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            rm -f $verbose "$DD"
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        else
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            mv $verbose "$DD" "$i" || warning "Can't restore $i file"
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        fi
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    done
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}
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# save and restore repo lists
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__on_error_restore_alt_repo_lists()
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{
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    warning "An error occurred..."
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    epm repo restore
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}
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try_change_alt_repo()
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{
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    epm repo save
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    trap __on_error_restore_alt_repo_lists EXIT
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}
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end_change_alt_repo()
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{
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    trap - EXIT
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}
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epm_reposave()
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{
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case $PMTYPE in
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    apt-*)
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        if ! is_root ; then
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            sudoepm repo save
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            return
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        fi
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        __save_alt_repo_lists
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        ;;
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    *)
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        fatal "Have no suitable command for $PMTYPE"
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        ;;
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esac
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}
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epm_reporestore()
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{
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case $PMTYPE in
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    apt-*)
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        if ! is_root ; then
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            sudoepm repo restore
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            return
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        fi
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        __restore_alt_repo_lists
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        ;;
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    *)
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        fatal "Have no suitable command for $PMTYPE"
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        ;;
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esac
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}
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epm_reporeset()
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{
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case $BASEDISTRNAME in
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    alt)
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        sudoepm repo set $DISTRVERSION
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        return
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        ;;
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esac
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case $PMTYPE in
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    winget)
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        sudocmd winget source reset
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        ;;
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    *)
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        fatal "Have no suitable command for $PMTYPE"
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        ;;
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esac
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}
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epm_repostatus()
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{
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case $PMTYPE in
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    apt-*)
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        load_helper epm-check_updated_repo
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        if [ -n "$short" ] ; then
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            local days
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            days="$(__epm_check_apt_db_days)" && return 0
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            echo "$days"
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            return 1
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        else
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            local days
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            days="$(__epm_check_apt_db_days)" && info "APT database is actual." && return 0
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            info "APT database is $days."
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            return 1
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        fi
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        ;;
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    *)
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        fatal "Have no suitable command for $PMTYPE"
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        ;;
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esac
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}
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