1 files changed, 121 insertions, 0 deletions
diff --git a/dev-util/rustup/files/symlink_rustup.sh b/dev-util/rustup/files/symlink_rustup.sh
new file mode 100644
index 000000000000..87365028843a
--- /dev/null
+++ b/dev-util/rustup/files/symlink_rustup.sh
@@ -0,0 +1,121 @@
+#!@GENTOO_PORTAGE_EPREFIX@/bin/bash
+
+set -euo pipefail
+IFS=$'\n\t'
+
+SYMLINK_RUSTUP_VERSION="0.0.2"
+
+: "${CARGO_HOME:=${HOME}/.cargo}"
+: "${RUSTUP_HOME:=${HOME}/.rustup}"
+
+__err_exists="already exists, remove and re-run the script"
+
+# dies with optional message
+die() {
+	[[ ${QUIET-no} ]] && echo -e "${NOCOLOR=\e[1;31m*\e[0m }ERROR: ${*}" >&2
+	exit 1
+} # die()
+
+
+# outputs gentoo-style green * prefixed message, a good one ofc
+good() {
+	[[ ${QUIET-no} ]] && echo -e "${NOCOLOR=\e[1;32m*\e[0m }${*}"
+	return 0
+} # good()
+
+
+# do I need to explain this?
+usage() {
+	echo "Usage: ${0} [<options>]"
+} # usage()
+
+# and this
+help() {
+	usage
+	echo
+	echo -n "Symlink system installation of rustup to"
+	echo " ${CARGO_HOME}"
+	echo
+	echo "Options:"
+	echo "	-a, --apply	Apply changes (required)"
+	echo "	-C, --nocolor	Disable colored output"
+	echo "	-d, --debug	Debug mode (sets -x shell option)"
+	echo "	-V, --version	Print version number"
+	echo "	-q, --quiet	Quiet mode"
+} # help()
+
+
+symlink_rustup() {
+	local binpath gentoo_rust tool tools=(
+		cargo{,-clippy,-fmt,-miri}
+		clippy-driver
+		rls
+		rust{c,doc,fmt,-gdb,-lldb,up}
+	)
+
+	binpath="@GENTOO_PORTAGE_EPREFIX@/usr/bin/rustup-init"
+	gentoo_rust="$(eselect --brief rust show 2>/dev/null)"
+
+	mkdir -p "${CARGO_HOME}/bin" || die
+
+	for tool in "${tools[@]}"; do
+		local symlink_path="${CARGO_HOME}/bin/${tool}"
+		if [[ -e "${symlink_path}" ]]; then
+			die "${symlink_path} ${__err_exists}"
+		else
+			ln -s ${QUIET--v} "${binpath}" "${symlink_path}" || die
+		fi
+	done
+
+	good "Setting gentoo ${gentoo_rust// /} as default toolchain"
+	[[ ${QUIET+set} != set ]] && "${CARGO_HOME}/bin/rustup" -V
+	"${CARGO_HOME}/bin/rustup" ${QUIET--v} toolchain link gentoo "/usr"
+	"${CARGO_HOME}/bin/rustup" ${QUIET--v} default gentoo
+	[[ ${QUIET+set} != set ]] && "${CARGO_HOME}/bin/rustup" show
+
+	good "Prepend ${CARGO_HOME}/bin to your PATH to use rustup"
+	good "rustup selfupdate is disabled, it will be updated by portage"
+} # symlink_rustup()
+
+
+main(){
+	local me
+	me="$(basename "${BASH_SOURCE[${#BASH_SOURCE[@]} - 1]}")"
+	while [[ ${#} -gt 0 ]]; do
+		case ${1} in
+			-a|--apply)
+				APPLY=true
+				;;
+			-h|--help)
+				help
+				exit 0
+				;;
+			-V|--version)
+				echo "${me} ${SYMLINK_RUSTUP_VERSION:-unknown}"
+				exit 0
+				;;
+			-d|--debug)
+				set -x
+				;;
+			-C|--nocolor)
+				NOCOLOR=
+				;;
+			-q|--quiet)
+				QUIET=
+				;;
+			-*)
+				usage >&2
+				exit 1
+				;;
+		esac
+		shift
+	done
+	if [[ ${APPLY:-false} == true ]]; then
+		symlink_rustup
+	else
+		help
+	fi
+} # main()
+
+
+main "${@}"