#!/usr/bin/env bash
# Install or update the GitHub Actions runner in ~/actions-runner, for
# copying into one sandbox per job. From https://exe.dev/deploy/github-actions.
# It doesn't register the runner: the dispatcher registers each copy itself.
set -euo pipefail

rel=$(curl -fsSL https://api.github.com/repos/actions/runner/releases/latest)
version=$(jq -r .tag_name <<<"$rel")
sha=$(jq -r .body <<<"$rel" | sed -n 's/.*<!-- BEGIN SHA linux-x64 -->\([0-9a-f]\{64\}\)<!-- END SHA linux-x64 -->.*/\1/p')
tarball=actions-runner-linux-x64-${version#v}.tar.gz

rm -rf ~/actions-runner && mkdir -p ~/actions-runner && cd ~/actions-runner
curl -fsSL -o "$tarball" "https://github.com/actions/runner/releases/download/$version/$tarball"
echo "$sha  $tarball" | sha256sum -c -
tar xzf "$tarball" && rm "$tarball"
sudo ./bin/installdependencies.sh >/tmp/runner-deps.log 2>&1 || { cat /tmp/runner-deps.log; exit 1; }

# Containers in jobs: start Docker with the VM rather than on first use.
sudo systemctl enable --now docker.service >/dev/null 2>&1
sync
echo "runner $version installed in ~/actions-runner"