#!/bin/bash

set -ex

token=$REGISTRATION_TOKEN
instance=$INSTANCE

[ -z "$token" ] && 2>&1 echo "REGISTRATION_TOKEN env var must be provided" && exit 1
[ -z "$instance" ] && 2>&1 echo "INSTANCE env var is not provided" && exit 1
[ $UID -ne 0 ] && 2>&1 echo "Run as root please, we are going to install stuff" && exit 1

mkdir -p /tmp/actrunner

trap "rm -rf /tmp/actrunner" EXIT

pushd /tmp/actrunner

VERSION=$(curl -s https://gitea.com/api/v1/repos/gitea/act_runner/releases | python3 -c 'import json,sys;print(json.load(sys.stdin)[0]["tag_name"])' | sed 's/v//')
OS=$(uname -s | tr '[:upper:]' '[:lower:]')
ARCH=$(uname -m | sed 's/x86_/amd/')

echo "Downloading version ${VERSION} ${OS} ${ARCH}..."
curl --progress-bar -L -o act_runner https://gitea.com/gitea/act_runner/releases/download/v${VERSION}/act_runner-${VERSION}-${OS}-${ARCH}
chmod +x act_runner

./act_runner register --no-interactive --instance $instance --token $token --name $(hostname) --labels ${OS},${ARCH}

cat <<EOF >/etc/systemd/system/act_runner.service
[Unit]
Description=Gitea Actions runner
Documentation=https://gitea.com/gitea/act_runner
After=docker.service

[Service]
ExecStart=/usr/sbin/act_runner daemon --config /etc/act_runner/config.yaml
ExecReload=/bin/kill -s HUP $MAINPID
WorkingDirectory=/var/lib/act_runner
TimeoutSec=0
RestartSec=10
Restart=always
User=act_runner

[Install]
WantedBy=multi-user.target
EOF

mkdir -p /etc/act_runner
mkdir -p /var/lib/act_runner
./act_runner generate-config > /etc/act_runner/config.yaml
mv act_runner /usr/sbin/
mv .runner /var/lib/act_runner/

useradd -r -m act_runner
usermod -aG docker act_runner
chown -R act_runner:act_runner /etc/act_runner
chown -R act_runner:act_runner /var/lib/act_runner

systemctl enable act_runner.service
systemctl start act_runner.service

popd