#!/bin/sh
#
# 2012 Nico Schottelius (nico-cdist at schottelius.org)
#
# This file is part of cdist.
#
# cdist 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, either version 3 of the License, or
# (at your option) any later version.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#
#

file="/$__object_id"
regex=""
state_should="present"
[ -f "$__object/parameter/file" ]  && file=$(cat "$__object/parameter/file")
[ -f "$__object/parameter/regex" ] && regex=$(cat "$__object/parameter/regex")
[ -f "$__object/parameter/state" ] && state_should=$(cat "$__object/parameter/state")
[ -f "$__object/parameter/line" ]  && line=$(cat "$__object/parameter/line")

state_is="$(cat "$__object/explorer/state")"

[ "$state_should" = "$state_is" ] && exit 0

case "$state_should" in
    present)
        if [ ! "$line" ]; then
            echo "Required parameter \"line\" is missing" >&2
            exit 1
        fi

        echo "echo \"$line\" >> $file"

    ;;
    absent)
        if [ "$regex" -a "$line" ]; then
            echo "Mutally exclusive parameters regex and line given for state absent" >&2
            exit 1
        fi

        [ "$line" ] && regex="^$line\$"

        cat << eof
tmp=\$(mktemp)
sed '/$regex/d' "$file" > \$tmp && cat "\$tmp" > "$file" && rm -f "\$tmp"
eof
        #echo "echo q | ex -c \"/${line}/d|w|q\" \"${file}\""
    ;;
    *)
       echo "Unknown state: $state_should" >&2
       exit 1
    ;;
esac