#!/bin/sh


# This file is part of scripts.

# scripts 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, version 3.

# scripts 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 scripts.  If not, see <https://www.gnu.org/licenses/>.

# Original author: Maciej Barć <xgqt@riseup.net>
# Copyright (c) 2020-2021, src_prepare group
# Licensed under the GNU GPL v3 License

# Use this script to check which pkgs in a overlay might
# be redundant - are in overlays other than the tested one
# Arguments:
#     1 - overlay

# depends (heavily) on eix (1)
# Some eix options used here:
#     --exact
#     --force-color
#     --in-overlay
#     --only-in-overlay
#     --only-names
#     --remote
#     --remote2


trap 'exit 128' INT


bold="$(tput bold)"
red="$(tput setaf 1)"
green="$(tput setaf 2)"
white="$(tput setaf 7)"
reset="$(tput sgr0)"


ok_msg() {
   printf "%s\n" "${bold}${green}* ${white}${1}${reset}"
}

err_msg() {
    # redirect error messages to standard error stream
    printf "%s\n" "${bold}${red}* ${white}${1}${reset}" >> /dev/stderr
}

usage() {
    cat <<EOF
Usage: planarchaos OVERLAY
Show redundant pkgs

Options:
    -h  show help

EOF
}

use_eix() {
    EIX_LIMIT=0 eix --remote --remote2 "${@}"
}


if ! command -v eix >/dev/null
then
    err_msg "No eix!"
    exit 1
fi

case "${1}" in
    -h | --help )
        usage
        exit 0
        ;;
    -* )
        usage
        exit 1
        ;;
    "" )
        usage
        exit 1
        ;;
esac


ov_pkgs="$(use_eix --only-names --in-overlay "${1}")"
known_unique="$(use_eix --only-in-overlay "${1}")"

nnuniq=0


for pkg in ${ov_pkgs}
do
    # check if pkg is not in known_unique (other overlys have it)
    if [ "${known_unique#*${pkg}}" = "${known_unique}" ]
    then
        nnuniq=$((nnuniq + 1))
        printf "\n"
        ok_msg "Package ${nnuniq} ${pkg}:"
        use_eix --exact --force-color "${pkg}"
    fi
done