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# -*-eselect-*- vim: ft=eselect
# Copyright 1999-2020 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
DESCRIPTION="Manage /usr/bin/vi implementations"
MAINTAINER="vim@gentoo.org"
VERSION="1.2"
# find a list of vi symlink targets, best first
find_targets() {
local f
for f in \
"${EROOT}"/usr/bin/vim \
"${EROOT}"/usr/bin/nvim \
"${EROOT}"/usr/bin/nvi \
"${EROOT}"/usr/bin/elvis \
"${EROOT}"/usr/bin/vile \
"${EROOT}"/usr/bin/gvim \
"${EROOT}"/usr/bin/qvim \
"${EROOT}"/usr/bin/xvile \
"${EROOT}"/usr/bin/vis \
"${EROOT}"/usr/bin/pyvim \
"${EROOT}"/bin/busybox \
; do
if [[ -f "${f}" ]] ; then
echo $(basename "${f}" )
fi
done
}
# try to remove the vi, ex, view and man vi symlinks
remove_symlinks() {
rm -f "${EROOT}"/usr/bin/{vi,ex,view} &>/dev/null && \
rm -f "${EROOT}"/usr/share/man/man1/{vi,ex,view}.1{,.Z,.gz,.bz2,.lzma,.lz,.lzo,.lz4,.xz,.zst} &> /dev/null
}
# set a man page symlink
set_man_symlink() {
local target="${1}" link_name="${2}" x extension
for x in '' .Z .gz .bz2 .lzma .lz .lzo .lz4 .xz .zst; do
if [[ -e ${EROOT}/usr/share/man/man1/${target}.1${x} ]]; then
extension=".1${x}"
break
fi
done
if [[ -z "${extension}" ]]; then
echo "Couldn't find a man page for ${target}; skipping." 1>&2
return 1
fi
ln -s "${target}${extension}" \
"${EROOT}/usr/share/man/man1/${link_name}${extension}"
}
# set the vi, ex, view, and man vi symlinks
set_symlinks() {
local target="${1}" targets
if is_number "${target}" && [[ ${target} -ge 1 ]]; then
targets=( $(find_targets ) )
target=${targets[target-1]}
fi
local dir
if [[ ${target} == "busybox" ]]; then
dir="${EROOT}/bin"
else
dir="${EROOT}/usr/bin"
fi
if [[ -f "${dir}/${target}" ]] ; then
remove_symlinks
# it's okay if these fail
set_man_symlink "${target}" "vi"
set_man_symlink "${target}" "ex"
set_man_symlink "${target}" "view"
# it's not okay if these fail
target=$(relative_name "${dir}/${target}" "${EROOT}/usr/bin")
ln -s "${target}" "${EROOT}/usr/bin/vi" \
|| die "Couldn't set ${target} /usr/bin/vi symlink"
ln -s "${target}" "${EROOT}/usr/bin/ex" \
|| die "Couldn't set ${target} /usr/bin/ex symlink"
ln -s "${target}" "${EROOT}/usr/bin/view" \
|| die "Couldn't set ${target} /usr/bin/view symlink"
else
die -q "Target \"${1}\" doesn't appear to be valid!"
fi
}
### show action ###
describe_show() {
echo "Show the current vi implementation"
}
do_show() {
[[ -z "${@}" ]] || die -q "Too many parameters"
write_list_start "Current vi implementation:"
if [[ -L "${EROOT}/usr/bin/vi" ]] ; then
write_kv_list_entry "$(basename $(canonicalise ${EROOT}/usr/bin/vi ) )" ""
elif [[ -e "${EROOT}/usr/bin/vi" ]] ; then
write_kv_list_entry "(not a symlink)" ""
else
write_kv_list_entry "(unset)" ""
fi
}
### list action ###
describe_list() {
echo "List available vi implementations"
}
do_list() {
[[ -z "${@}" ]] || die -q "Too many parameters"
local i targets
targets=( $(find_targets ) )
for (( i = 0; i < ${#targets[@]}; i++ )); do
[[ ${targets[i]} = \
$(basename "$(canonicalise "${EROOT}/usr/bin/vi")") ]] \
&& targets[i]=$(highlight_marker "${targets[i]}")
done
write_list_start "Available vi implementations:"
write_numbered_list -m "(none found)" "${targets[@]}"
}
### set action ###
describe_set() {
echo "Set a new vi implementation provider"
}
describe_set_options() {
echo "target : Target name or number (from 'list' action)"
}
describe_set_parameters() {
echo "<target>"
}
do_set() {
if [[ -z "${1}" ]] ; then
die -q "You didn't give me a provider name"
elif [[ -n "${2}" ]] ; then
die -q "Too many parameters"
elif [[ -L "${EROOT}/usr/bin/vi" ]] ; then
if ! remove_symlinks ; then
die -q "Can't remove existing provider"
elif ! set_symlinks "${1}" ; then
die -q "Can't set new provider"
fi
elif [[ -e "${EROOT}/usr/bin/vi" ]] ; then
die -q "Sorry, ${EROOT}/usr/bin/vi confuses me"
else
set_symlinks "${1}" || die -q "Can't set a new provider"
fi
}
### update action ###
describe_update() {
echo "Automatically update the vi provider"
}
describe_update_options() {
echo "--if-unset : Do not override existing implementation"
}
do_update() {
[[ -z "${1}" ]] || ( [[ -z "${2}" ]] && [[ "${1}" == "--if-unset" ]] ) || \
die -q "Usage error"
if [[ -L "${EROOT}/usr/bin/vi" ]]; then
[[ ${1} == "--if-unset" ]] && return
remove_symlinks || die -q "Can't remove existing link"
fi
if [[ -e "${EROOT}/usr/bin/vi" ]]; then
die -q "Can't set a new provider"
elif ! [[ -z $(find_targets ) ]]; then
set_symlinks 1 || die -q "Can't set a new provider"
fi
}
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