#!/bin/sh


# Original author: XGQT
# Licensed under the ISC License
# Copyright (c) 2020, src_prepare group

# 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() {
   echo "${bold}${green}* ${white}${1}${reset}"
}

err_msg() {
    echo "${bold}${red}* ${white}${1}${reset}"
}

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))
        echo
        ok_msg "Package ${nnuniq} ${pkg}:"
        use_eix --exact --force-color "${pkg}"
    fi
done