#!/bin/bash

#
# Ephemeral runner startup script.
#
# Expects the following environment variables:
#
# - repo=<owner>/<name>
# - access_token=<ghp_***>
#

set -e -u

# Check the cached registration token.
token_file=registration-token.json
set +e
expires_at=$(jq --raw-output .expires_at "$token_file" 2>/dev/null)
status=$?
set -e
if [[ $status -ne 0 || $(date +%s) -ge $(date -d "$expires_at" +%s) ]]; then
    # Refresh the cached registration token.
    curl \
        -X POST \
        -H "Accept: application/vnd.github.v3+json" \
        -H "Authorization: token $access_token" \
        "https://api.github.com/repos/$repo/actions/runners/registration-token" \
        -o "$token_file"
fi

# (Re-)register the runner.
registration_token=$(jq --raw-output .token "$token_file")
./config.sh remove --token "$registration_token" || true
./config.sh \
    --url "https://github.com/$repo" \
    --token "$registration_token" \
    --labels z15 \
    --ephemeral

# Run one job.
./run.sh