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Diffstat (limited to 'vi.eselect.in')
| -rw-r--r-- | vi.eselect.in | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/vi.eselect.in b/vi.eselect.in new file mode 100644 index 0000000..af51482 --- /dev/null +++ b/vi.eselect.in @@ -0,0 +1,190 @@ +# -*-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 \ + "${EROOT}"/usr/bin/pyvim \ + "${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{,.gz,.bz2,.lzma} &>/dev/null +} + +# set a man page symlink +set_man_symlink() { + local target="${1}" link_name="${2}" x extension + + for x in ".1" ".1.bz2" ".1.gz" ".1.lzma"; do + if [[ -e ${EROOT}/usr/share/man/man1/${target}${x} ]]; then + extension="${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 +} |