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# -*-eselect-*- vim: ft=eselect
# Copyright 2014 Gentoo Foundation
# Distributed under the terms of the GNU GPL version 2 or later
DESCRIPTION="Manage the rust compiler versions"
MAINTAINER="jauhien@gentoo.org"
VERSION="0.1"
inherit package-manager path-manipulation
SITELISP=/usr/share/emacs/site-lisp
SITEVIM=/usr/share/vim/vimfiles
SITEZSH=/usr/share/zsh/site-functions
# find a list of installed rust compilers
find_targets() {
local f
local version
for f in "${EROOT}"/usr/bin/rustc-*; do
version=""
[[ -x ${f} ]] && version=`basename "${f}" | awk -F"-" '{ print $2 }'`
has_version "=dev-lang/rust-${version}" && echo ${version}
done
}
# remove symlink if exists
remove_symlink() {
local symlink=$1
if [[ -L ${symlink} ]]; then
# existing symlink
rm ${symlink} || die -q "Couldn't remove existing symlink ${symlink}"
elif [[ -e ${symlink} ]]; then
# we have something strange
die -q "${symlink} exists but is not a symlink"
fi
}
# Regenerate the site-gentoo.el file, based on packages' site
# initialisation files in the /usr/share/emacs/site-lisp/site-gentoo.d/
# directory.
# A slightly changed function from elisp-common.eclass
elisp-site-regen() {
local sitelisp=${EROOT}${SITELISP}
local sf i ret=0 null="" page=$'\f'
local -a sflist
local T=${EROOT}/tmp/eselect
mkdir -p "${T}" || die -q "temporary directory creation failed for ${T}"
[[ -d ${sitelisp} ]] \
|| die -q "elisp-site-regen: Directory ${sitelisp} does not exist"
[[ -d ${T} ]] \
|| die -q "elisp-site-regen: Temporary directory ${T} does not exist"
for sf in "${sitelisp}"/site-gentoo.d/[0-9][0-9]*.el; do
[[ -r ${sf} ]] && sflist+=("${sf}")
done
cat <<-EOF >"${T}"/site-gentoo.el || ret=$?
;;; site-gentoo.el --- site initialisation for Gentoo-installed packages
;;; Commentary:
;; Automatically generated by eselect-rust
;; DO NOT EDIT THIS FILE
;;; Code:
EOF
# Use sed instead of cat here, since files may miss a trailing newline.
sed '$q' "${sflist[@]}" </dev/null >>"${T}"/site-gentoo.el || ret=$?
cat <<-EOF >>"${T}"/site-gentoo.el || ret=$?
${page}
(provide 'site-gentoo)
;; Local ${null}Variables:
;; no-byte-compile: t
;; buffer-read-only: t
;; End:
;;; site-gentoo.el ends here
EOF
if [[ ${ret} -ne 0 ]]; then
die -q "elisp-site-regen: Writing site-gentoo.el failed."
else
mv "${T}"/site-gentoo.el "${sitelisp}"/site-gentoo.el || \
die -q "elisp-site-regen: Replacing site-gentoo.el failed"
fi
rm -rf "${T}"
true
}
# set symlink if source exists
set_symlink() {
local source=$1
local dest=$2
if [[ -e ${source} ]]; then
mkdir -p "$(dirname ${dest})" || die -q "directory creation failed for $(dirname ${dest})"
ln -s "${source}" "${dest}" || die -q "${dest} symlink setting failed"
else
false
fi
}
# set the rust version
set_version() {
local target=$1
if is_number "${target}"; then
local targets=( $(find_targets) )
target=${targets[target-1]}
fi
[[ -z ${target} || ! -x "${EROOT}/usr/bin/rustc-${target}" ]] \
&& die -q "Target \"$1\" doesn't appear to be valid!"
local datadir="${EROOT}/usr/share/rust-${target}"
remove_symlink "${EROOT}"/usr/bin/rustc
remove_symlink "${EROOT}"/usr/bin/rustdoc
remove_symlink "${EROOT}/${SITELISP}"/rust-mode
remove_symlink "${EROOT}/${SITELISP}"/site-gentoo.d/50rust-mode-gentoo.el
for i in after/syntax autoload ftdetect ftplugin indent plugin syntax; do
remove_symlink "${EROOT}/${SITEVIM}/${i}/rust.vim"
done
for i in compiler syntax_checkers/rust; do
remove_symlink "${EROOT}/${SITEVIM}/${i}/rustc.vim"
done
remove_symlink "${EROOT}/${SITEVIM}/doc/rust.txt"
remove_symlink "${EROOT}/${SITEZSH}/_rust"
ln -s "${EROOT}/usr/bin/rustc-${target}" "${EROOT}/usr/bin/rustc" || die -q "rustc symlink setting failed"
ln -s "${EROOT}/usr/bin/rustdoc-${target}" "${EROOT}/usr/bin/rustdoc" || die -q "rustdoc symlink setting failed"
set_symlink "${datadir}/emacs/site-lisp/rust-mode" "${EROOT}/${SITELISP}/rust-mode" && \
set_symlink "${datadir}/emacs/site-lisp/site-gentoo.d/50rust-mode-gentoo.el" \
"${EROOT}/${SITELISP}/site-gentoo.d/50rust-mode-gentoo.el" && \
elisp-site-regen
local rustvimdir="${datadir}/vim/vimfiles"
for i in after/syntax autoload ftdetect ftplugin indent plugin syntax; do
set_symlink "${rustvimdir}/${i}/rust.vim" "${EROOT}/${SITEVIM}/${i}/rust.vim"
done
for i in compiler syntax_checkers/rust; do
set_symlink "${rustvimdir}/${i}/rustc.vim" "${EROOT}/${SITEVIM}/${i}/rustc.vim"
done
set_symlink "${rustvimdir}/doc/rust.txt" "${EROOT}/${SITEVIM}/doc/rust.txt"
set_symlink "${datadir}/zsh/site-functions/_rust" "${EROOT}/${SITEZSH}/_rust"
true
}
### list action ###
describe_list() {
echo "List available rust versions"
}
do_list() {
local i targets=( $(find_targets) )
write_list_start "Available rust versions:"
for (( i = 0; i < ${#targets[@]}; i++ )); do
# highlight the target where the symlink is pointing to
[[ rustc-${targets[i]} = \
$(basename "$(canonicalise "${EROOT}/usr/bin/rustc")") ]] \
&& targets[i]=$(highlight_marker "${targets[i]}")
done
write_numbered_list -m "(none found)" "${targets[@]}"
}
### set action ###
describe_set() {
echo "Set active rust version"
}
describe_set_parameters() {
echo "<target>"
}
describe_set_options() {
echo "target : Target number (from 'list' action)"
}
do_set() {
[[ -z $1 ]] && die -q "You didn't tell me what to set the version to"
[[ $# -gt 1 ]] && die -q "Too many parameters"
set_version "$1" || die -q "Couldn't set new active version"
}
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