#!/bin/sh
# Display information for quick install

set -e

OPT_ALL=
OPT_EXIST=
OPT_QUIET=
while getopts "aeq" opt; do
    case "${opt}" in
    a)
        OPT_ALL="yes"
        ;;
    e)
        OPT_EXIST="yes"
        ;;
    q)
        OPT_QUIET="yes"
        ;;
    *)
        ;;
    esac
done
shift $(expr ${OPTIND} - 1)
PKGNAME="$1"
test -z "${PKGNAME}" && OPT_ALL="yes"

set -u

_error() {
    local msg="$1"
    test -z "${OPT_QUIET}" && echo "${msg}"
    exit 1
}

_info_pkg () {
    local pkg="$1"

    test -r "${pkg}/+COMMENT" || return 2
    test -n "${OPT_EXIST}" && return 0

    echo -n "${pkg}"
    if [ -n "${OPT_QUIET}" ]; then
        echo ""
    else
        echo -n " "
        head -1 ${pkg}/+COMMENT
    fi
}

test -n "${PKG_DBDIR}" || _error "Error: No such directory"
test -d "${PKG_DBDIR}" || exit 0

cd ${PKG_DBDIR} || _error "Error: Permission denied"

if [ -n "${PKGNAME}" ]; then
    _info_pkg "${PKGNAME}" || _error "Error: No package matching ${PKGNAME}"
elif [ -n "${OPT_ALL}" ]; then
    ls -1 | while read dir; do
        _info_pkg "${dir}" || :
    done
fi

: end of script