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install-toolchain.sh

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#!/bin/bash

set -eu

scripts_dir="$(cd "$(dirname $0)" && pwd)"

default_swift_version="$(cat $scripts_dir/../.swift-version)"

SWIFT_VERSION="${SWIFT_VERSION:-$default_swift_version}"

swift_tag="swift-$SWIFT_VERSION"

if [ -z "$(which swiftenv)" ]; then

echo "swiftenv not installed, please install it before this script."

exit 1

fi

if [ ! -z "$(swiftenv versions | grep $SWIFT_VERSION)" ]; then

echo "$SWIFT_VERSION is already installed."

exit 0

fi

case $(uname -s) in

Darwin)

toolchain_download="$swift_tag-macos_x86_64.pkg"

;;

Linux)

if [ $(grep RELEASE /etc/lsb-release) == "DISTRIB_RELEASE=18.04" ]; then

toolchain_download="$swift_tag-ubuntu18.04_x86_64.tar.gz"

elif [ $(grep RELEASE /etc/lsb-release) == "DISTRIB_RELEASE=20.04" ]; then

toolchain_download="$swift_tag-ubuntu20.04_x86_64.tar.gz"

else

echo "Unknown Ubuntu version"

exit 1

fi

;;

*)

echo "Unrecognised platform $(uname -s)"

exit 1

;;

esac

toolchain_download_url="https://github.com/swiftwasm/swift/releases/download/$swift_tag/$toolchain_download"

swiftenv install "$toolchain_download_url"