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# -*-eselect-*- vim: ft=eselect
# Copyright 2014-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
inherit config multilib
DESCRIPTION="Manage lua symlinks"
MAINTAINER="mva@gentoo.org"
HEADER_FILES="lauxlib.h luaconf.h lua.h lua.hpp lualib.h"
remove_symlinks() {
rm -f "${EROOT}"/usr/bin/{lua,luac} &>/dev/null
rm -f "${EROOT}"/usr/share/man/man1/lua{,c}.1{,.*} &>/dev/null
}
_dup() {
dirname ${1}/.
}
set_symlinks() {
local ver=${1#lua}
local bin_prefix="${EROOT}/usr/bin"
ln -s lua${ver} $(_dup "${bin_prefix}"/lua)
if [[ -f "${bin_prefix}"/luac${ver} ]]; then
ln -s luac${ver} $(_dup "${bin_prefix}"/luac)
fi
for manpage in "${EROOT}"/usr/share/man/man1/lua{,c}${ver}.1.* ; do
test -f ${manpage} &&
ln -s $(basename "${manpage}") $(_dup "${manpage//${ver}}")
done
}
find_targets() {
local dirs
local prefix="${EROOT}/usr/bin/"
for f in ${prefix}lua{5,jit-2}.* ; do
[[ -f "${f}" ]] && dirs="${dirs} ${f##$prefix}"
done
echo $dirs
}
resolve_target() {
local targets=( $(find_targets) )
if is_number $1; then
[[ $1 -le ${#targets[@]} && $1 -gt 0 ]] && echo "${targets[ $(( $1 - 1 )) ]}"
elif has $1 ${targets[@]}; then
echo $1
fi
}
get_active_version() {
readlink -e "${EROOT}"/usr/bin/lua | sed -ne "s:.*/usr/bin/\([\w.-]*\):\1:p"
}
## Actual actions
## set action
describe_set() {
echo "Sets the current version of lua"
}
describe_set_parameters() {
echo '[--if-unset] <target>'
}
describe_set_options() {
echo '--if-unset: Do not replace currently selected implementation'
echo 'target: Target name or number (from "list" action)'
}
do_set() {
if [ "${1}" == "--if-unset" ]; then
if [[ -n "$(get_active_version)" ]]; then
return
fi
shift
fi
local target=$(resolve_target $1)
if [[ -z "${target}" ]]; then
die -q "You need to specify a version"
fi
remove_symlinks
set_symlinks $target
}
## List action
describe_list() {
echo 'Lists available lua versions'
}
do_list() {
local targets
local a
targets=( $(find_targets) )
a=$(get_active_version)
for (( i = 0; i < ${#targets[@]}; i++ )) ; do
[[ $a == ${targets[i]} ]] && targets[i]=$(highlight_marker "${targets[i]}")
done
write_numbered_list -m '(none found)' "${targets[@]}"
}
## Show action
describe_show() {
echo 'Show the active lua version'
}
do_show() {
get_active_version
}
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