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# -*-eselect-*- vim: ft=eselect
# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2 or later
# $Id: $
DESCRIPTION="Switch between LightDM greeters"
MAINTAINER="lxnay@gentoo.org"
VERSION="0.1"
# Module variables
GREETERS_DIR="${EROOT}/usr/share/xgreeters"
GREETER_SYM="${GREETERS_DIR}/default.desktop"
find_targets() {
local f fname
for f in "${GREETERS_DIR}/"*; do
[[ "${f}" == "${GREETER_SYM}" ]] && continue
# skip dirs
[[ -d "${f}" ]] && continue
# skip broken syms etc
[[ ! -e "${f}" ]] && continue
# skip non reg files
[[ ! -f "${f}" ]] && continue
fname=$(basename "${f}")
[[ "${fname}" == *.desktop ]] || continue
echo "${fname%%.desktop}"
done
}
remove_symlink() {
rm "${GREETER_SYM}"
}
set_symlink() {
local target="${1}"
if is_number "${target}"; then
local targets=( $(find_targets) )
target=${targets[target-1]}
fi
[[ -z "${target}" || ! -f "${GREETERS_DIR}/${target}.desktop" ]] \
&& die -q "Target \"${target}\" doesn't appear to be valid!"
echo "Setting LightDM greeter to ${target}"
ln -sf "${target}.desktop" "${GREETER_SYM}" || die "Cannot create symlink"
}
### show action ###
describe_show() {
echo "Show the current LightDM greeter"
}
describe_show_options() {
echo "--quiet : only print the actual symlink value"
echo "--silent : same as --quiet"
}
do_show() {
local quiet=""
while [[ $# -gt 0 ]]; do
case ${1##--} in
quiet|silent)
quiet="1"
;;
esac
shift
done
[[ -z "${quiet}" ]] && write_list_start "Current greeter:"
if [[ -L "${GREETER_SYM}" ]] && [[ -e "${GREETER_SYM}" ]]; then
local greeter=$(canonicalise "${GREETER_SYM}")
local greeter_bn=$(basename "${greeter%.desktop}")
if [[ -n "${quiet}" ]]; then
echo "${greeter_bn}"
else
write_kv_list_entry "${greeter_bn}" ""
fi
else
if [[ -z "${quiet}" ]]; then
write_kv_list_entry "(unset)" ""
fi
fi
}
### list action ###
describe_list() {
echo "List available LightDM greeters"
}
describe_list_options() {
echo "--quiet : only print the actual symlink value"
echo "--silent : same as --quiet"
}
do_list() {
local quiet
while [[ $# -gt 0 ]]; do
case ${1##--} in
quiet|silent)
quiet="1"
;;
esac
shift
done
local i targets=( $(find_targets) )
[[ -z "${quiet}" ]] && write_list_start "Available LightDM greeters:"
for (( i = 0; i < ${#targets[@]}; i++ )); do
if [[ -z "${quiet}" ]]; then
# highlight the target where the symlink is pointing to
[[ ${targets[i]} = \
$(basename "$(canonicalise "${GREETER_SYM}")") ]] \
&& targets[i]=$(highlight_marker "${targets[i]}")
else
echo "${targets[i]}"
fi
done
[[ -z "${quiet}" ]] && \
write_numbered_list -m "(none found)" "${targets[@]}"
}
### set action ###
describe_set() {
echo "Set a new LightDM greeter"
}
describe_set_parameters() {
echo "<target>"
}
describe_set_options() {
echo "target : Target name or number (from 'list' action)"
echo "--use-old : use the old value if target is already set"
}
do_set() {
local use_old
local target="${1}"
while [[ $# -gt 0 ]]; do
case ${1##--} in
use-old)
use_old="1"
;;
esac
shift
done
[[ -z "${target}" ]] && \
die -q "You didn't tell me what to set the symlink to"
[[ ${#} -gt 1 ]] && die -q "Too many parameters"
if [[ "${use_old}" = "1" ]]; then
old_target=$(do_show --quiet)
target="${old_target:-${target}}"
fi
if [[ -L "${GREETER_SYM}" ]]; then
# existing symlink
remove_symlink || die -q "Couldn't remove existing symlink"
set_symlink "${target}" || die -q "Couldn't set a new symlink"
elif [[ -e "${GREETER_SYM}" ]]; then
# we have something strange
die -q "${GREETER_SYM} exists but is not a symlink"
else
set_symlink "${target}" || die -q "Couldn't set a new symlink"
fi
}
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