#!/bin/bash
#  $HeadURL$ $LastChangedRevision$
set -e
PROGNAME=$(basename $0)

#  Load support functions
. $(pcms-config PCMS_SHARE_PREFIX)/scripts/support.sh

main()
{
    #  Defaults for options
    VERBOSELEVEL=2
    OPT_FILE=
    OPT_TOUCH=false

    #  Process options
    while [ $# -ge 1 ]; do
        case $1 in
            --file=*)        OPT_FILE=${1#*=} ;;
            --touch)         OPT_TOUCH=true ;;
            --debug=*)       VERBOSELEVEL=${1#*=} ;;
            -d)              VERBOSELEVEL=$2; shift ;;
            -v|--verbose)    VERBOSELEVEL=3 ;;
            --)              shift; break ;;
            -*)              error "main: $1: bad option" ;;
            *)               break ;;
        esac
        shift
    done

    #  Process arguments
    [ $# = 1 ] || usage
    eval set -- $(encode --decode "$1")
    [ $# -eq 2 ] || usage
    LOGIN="$1"
    SSHKEY="$2"

    #  Sanity checks and derivations
    id $LOGIN >/dev/null 2>&1 || error "$LOGIN: no such login"
    if [ "X$OPT_FILE" != X ]; then
        CHOWN_FLAG=false
    else
        CHOWN_FLAG=true
        eval "OPT_FILE=~$LOGIN/.ssh/authorized_keys"
    fi

    #  Guts
    lineinfile --after=EOF --text="$SSHKEY" --file=$OPT_FILE
    ! $CHOWN_FLAG || chown -R $LOGIN:$LOGIN $(dirname $OPT_FILE)
    ! $OPT_TOUCH || touch $OPT_FILE
}

usage() { echo "Usage: $PROGNAME <login>@<key>" >&2; exit 1; }

main "$@"