tc-latest

#!/bin/bash

set -e

branch=$1
if [ -z "$branch" ]; then
    branch="main"
    urlPrefix="https://download.swift.org/development/xcode"
else
    urlPrefix="https://download.swift.org/swift-${branch}-branch/xcode"
fi

latest=$(curl -s https://www.swift.org/api/v1/install/dev/${branch}/macos.json | jq '.universal | max_by(.date)')

dir=$(echo ${latest} | jq -r '.dir')

tcDir=~/Library/Developer/Toolchains
latestDir=${tcDir}/${dir}.xctoolchain

if [ -d ${latestDir} ]; then
    echo ${dir} already installed
    exit 0
else
    echo installing ${dir}
fi

pkg=$(echo ${latest} | jq -r '.download')
pkgtmp=${pkg}.tmp

mkdir -p ${tcDir}
curl -L ${urlPrefix}/${dir}/${pkg} > ${tcDir}/${pkg}
pkgutil --expand ${tcDir}/${pkg} ${tcDir}/${pkgtmp}
mkdir -p ${latestDir}
tar xf ${tcDir}/${pkgtmp}/${dir}-osx-package.pkg/Payload -C ${latestDir}
rm -fr ${tcDir}/${pkg} ${tcDir}/${pkgtmp}
ln -sf ${latestDir} ${tcDir}/latest