#!/bin/bash
#  $HeadURL$ $LastChangedRevision$

#  Modules
. $(miniade) || { echo "${0##*/}: ERROR: miniade failed (hint: run 'miniade' to see error)" >&2; exit 1; }

#  Configurable stuff

#  Other globals

main()
{
    local MY_ARGS
    #  Defaults for options

    #  Process options
    miniade_process_options --help-handler=help MY_ARGS "$@" && set -- "${MY_ARGS[@]}"

    #  Process arguments
    [ $# = 1 ] || miniade_bad_usage
    type encode > /dev/null 2>&1 || miniade_internal "encode: command not found (hint: is PATH set correctly?)"
    ENCODE_OUTPUT=$(encode --decode "$1") || miniade_internal "encode: failed (hint: see messages above)"
    eval set -- "$ENCODE_OUTPUT"
    [ $# -ge 2 ] || miniade_bad_usage
    LOGIN="$1"
    shift
    unset GROUPS    #  GROUPS is a bash builtin until unassigned
    GROUPS="$@"
    echo "LOGIN=$LOGIN, GROUPS=$GROUPS"

    #  Sanity checks and derivations
    id $LOGIN > /dev/null 2>&1 || miniade_error "$LOGIN: no such login"
    for GROUP in $GROUPS; do
         getent group $GROUP > /dev/null 2>&1 || miniade_error "$GROUP: no such group"
    done
    
    #  Guts
    usermod -a -G ${GROUPS// /,} $LOGIN
}

help()
{
    local PROGNAME

    miniade_get_progname PROGNAME
    echo "Usage: $PROGNAME [ <standard-options> ] <login>@<group>[@<group>...]>"
    exit 0
}

main "$@"