#!/bin/sh -e
#
# 2018 Ander Punnar (ander-at-kvlt-dot-ee)
#
# 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/>.
#

os="$( cat "$__global/explorer/os" )"

acl_path="/$__object_id"

acl_is="$( cat "$__object/explorer/acl_is" )"

acl_should="$( for parameter in user group
do
    if [ ! -f "$__object/parameter/$parameter" ]
    then continue
    fi
    while read -r l
    do
        echo "$parameter:$l"

        if [ -f "$__object/parameter/default" ]
        then echo "default:$parameter:$l"
        fi
    done < "$__object/parameter/$parameter"
done
if [ -f "$__object/parameter/mask" ]
then
    l=$( cat "$__object/parameter/mask" )

    echo "mask::$l"

    if [ -f "$__object/parameter/default" ]
    then echo "default:mask::$l"
    fi
fi
)"

setfacl_exec='setfacl'

if [ -f "$__object/parameter/recursive" ]
then
    if echo "$os" | grep -Eq 'macosx|freebsd'
    then
        echo "$os setfacl do not support recursive operations" >&2
    else
        setfacl_exec="$setfacl_exec -R"
    fi
fi

if [ -f "$__object/parameter/remove" ]
then
    if echo "$os" | grep -Fq 'solaris'
    then
        # Solaris setfacl behaves differently.
        # We will not support Solaris for now, because no way to test it.
        # But adding support should be easy (use -s instead of -m on modify).
        echo "$os setfacl do not support -x flag for ACL remove" >&2
    else
        echo "$acl_is" | while read -r acl
        do
            if echo "$acl_should" | grep -Fq "$acl"
            then continue
            fi

            no_bits="$( echo "$acl" | sed -r 's/:[rwx-]+$//' )"

            echo "$setfacl_exec -x \"$no_bits\" \"$acl_path\""
        done
    fi
fi

for acl in $acl_should
do
    if ! echo "$acl_is" | grep -Eq "^$acl"
    then echo "$setfacl_exec -m \"$acl\" \"$acl_path\""
    fi
done